Hello to all…

..Isolated to Scattered Strong to Severe Thunderstorms are possible Tuesday Afternoon and Evening anytime between 12-9 PM across much of Southern New England with the greatest potential in interior Southern New England from roughly Southwest Massachusetts and the Connecticut River Valley through Central and interior Northeast Massachusetts, North-Central Rhode Island and Connecticut..
..The Storm Prediction Center (SPC) has placed much of Southern New England in a marginal risk for severe weather for Tuesday with strong to damaging winds, hail, frequent lighting and heavy rainfall leading to urban and poor drainage flooding as the main threats..
..Additionally, SPC has placed all of Southern New England in a slight risk for severe weather on Thursday as oppressive heat and humidity builds into the region. Future coordination messages on Wednesday will detail this severe weather potential and the oppressive heat potential for the Thursday through Saturday timeframe..
..A Post Severe Weather/Flood Coordination Message from the Friday 7/21/23 flash flood and severe weather event will be posted later today or on Wednesday as we wrap up data, pictures, videos etc. that have come in while handling today’s severe weather potential and the team also handled isolated strong thunderstorm activity from Monday Afternoon and Evening..
..SKYWARN Self-Activation will monitor the severe weather potential for Tuesday Afternoon and Evening and Self-Activation, at minimum, is likely on Thursday Afternoon and Evening..

Continued periodic chances for severe weather and flooding continue this week along with the potential for a heat wave in the Thursday through Saturday timeframe. This message focuses on today’s potential across Southern New England with another potentially more robust severe weather event on Thursday that will be handled in future coordination messages along with the oppressive heat potential. The headlines depict the current thinking. Key factors for Tuesday’s severe weather potential include:

1.) Timing of the trough axis into Southern New England. This timing has varied the severe weather potential from early to mid afternoon to the later afternoon/early evening timeframe so there is a wide range in time on the severe weather potential.
2.) Upper level Wind Shear and certain instability parameters are favorable but lower levels of the atmosphere winds and other instability parameters are unfavorable so the more favorable parameters will be key in overcoming the unfavorable ones for isolated to scattered strong to severe thunderstorms to develop.

SKYWARN Self-Activation will monitor the severe weather potential for Tuesday Afternoon and Evening and Self-Activation, at minimum, is likely on Thursday Afternoon and Evening. This will likely be the only coordination message on today’s severe weather potential unless a significant upgrade to the situation occurs and time allows for an update. Below is the NWS Boston/Norton Area Forecast Discussion, Enhanced Hazardous Weather Outlook and SPC Day-1 Convective Outlook:

NWS Boston/Norton Area Forecast Discussion:
https://forecast.weather.gov/product.php?site=NWS&issuedby=BOX&product=AFD&format=CI&version=1&glossary=1&highlight=off

NWS Boston/Norton Enhanced Hazardous Weather Outlook:
https://www.weather.gov/erh/ghwo?wfo=box

SPC Day-1 Convective Outlook:
https://www.spc.noaa.gov/products/outlook/day1otlk.html

Respectfully Submitted,

Robert Macedo (KD1CY)
ARES SKYWARN Coordinator
Eastern Massachusetts ARES Section Emergency Coordinator
Home Phone #: (508) 994-1875
Home/Data #: (508) 997-4503
Email Address: rmacedo@rcn.com
https://ares.ema.arrl.org
https://www.wx1box.org
Like us on Facebook – https://www.facebook.com/wx1box
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Hello to all…

..Isolated to scattered strong to severe thunderstorms are becoming more likely in Western, Central Massachusetts and Connecticut for Friday Afternoon and Evening between 2-9 PM. Strong to damaging winds, hail, heavy rainfall with urban and poor drainage flooding are the primary threats with an isolated tornado as a secondary threat. The Storm Prediction Center (SPC) has upgraded Western and Central Massachusetts and Connecticut to a slight risk for severe weather with a marginal risk through Rhode Island and the I-495 corridor of Eastern Massachusetts north of the Mass Pike..
..The Weather Prediction Center (WPC) has placed the same area in a marginal to slight risk of excessive rainfall..
..SKYWARN Self-Activation will monitor the severe weather and flood potential for Friday Afternoon and Evening..

An evolving severe weather scenario for today with increasing potential per model runs between last night and this morning. SPC has upgraded Western and Central Massachusetts to a Slight Risk for severe weather as noted in the headlines. The key factors for today include:

1.) Current radar shows showers and cloud cover over the Slight risk area with clearing behind this activity. This is associated with the warm front which is expected to slow down and hold near the Central Massachusetts to New Hampshire area. The amount of clearing for destabilization and instability will be critical for a more robust severe weather event in the Slight risk area.
2.) The overlap of instability with shear and forcing near the time of peak heating.
3.) The position of the warm front and how close it is to cold frontal thunderstorms will determine the level of rotation within the thunderstorms. Timing and whether two rounds of strong to severe thunderstorms may occur in the region is a bit lower confidence so the afternoon and early evening timeframe from 2-9 PM and perhaps slightly earlier in the afternoon will need to be watched.

SKYWARN Self-Activation will monitor the severe weather and flood potential for Friday Afternoon and Evening. This will be the last coordination message as we shift into operations mode unless time allows and a critical operational update is needed. Below is the NWS Boston/Norton Area Forecast Discussion, Enhanced Hazardous Weather Outlook, SPC Day-1 Convective Outlook and WPC Excessive Rainfall Outlook..

NWS Boston/Norton Area Forecast Discussion:
https://forecast.weather.gov/product.php?site=NWS&issuedby=BOX&product=AFD&format=CI&version=1&glossary=1&highlight=off

NWS Boston/Norton Enhanced Hazardous Weather Outlook:
https://www.weather.gov/erh/ghwo?wfo=box

WPC Day-2 Excessive Rainfall Outlook & Discussion:
https://www.wpc.ncep.noaa.gov/discussions/hpcdiscussions.php?disc=qpferd
https://www.wpc.ncep.noaa.gov/qpf/excessive_rainfall_outlook_ero.php

SPC Day-1 Convective Outlook:
https://www.spc.noaa.gov/products/outlook/day1otlk.html

Respectfully Submitted,

Robert Macedo (KD1CY)
ARES SKYWARN Coordinator
Eastern Massachusetts ARES Section Emergency Coordinator
Home Phone #: (508) 994-1875
Home/Data #: (508) 997-4503
Email Address: rmacedo@rcn.com
https://ares.ema.arrl.org
https://www.wx1box.org
Like us on Facebook – https://www.facebook.com/wx1box
Follow us on Twitter – https://twitter.com/wx1box
Subscribe on YouTube – https://www.youtube.com/@wx1box-nwsboston-amateur-radio

Hello to all…

..Isolated to scattered strong to severe thunderstorms are possible in Western and Central Massachusetts and most of Connecticut for Friday Afternoon and Evening between 2-9 PM. Strong to damaging winds, hail, heavy rainfall with urban and poor drainage flooding are the primary threats with an isolated tornado as a secondary threat. The Storm Prediction Center (SPC) has placed Western and Central Massachusetts and most of Connecticut in a marginal risk for severe weather and the Weather Prediction Center (WPC) has placed the same area in a marginal to slight risk of excessive rainfall..
..SKYWARN Self-Activation will monitor the severe weather and flood potential for Friday Afternoon and Evening. A more complete coordination message will be posted Friday Morning by 11 AM. Below is the NWS Boston/Norton Area Forecast Discussion, Enhanced Hazardous Weather Outlook, SPC Day-2 Convective Outlook and WPC Excessive Rainfall Outlook..

NWS Boston/Norton Area Forecast Discussion:
https://forecast.weather.gov/product.php?site=NWS&issuedby=BOX&product=AFD&format=CI&version=1&glossary=1&highlight=off

NWS Boston/Norton Enhanced Hazardous Weather Outlook:
https://www.weather.gov/erh/ghwo?wfo=box

WPC Day-2 Excessive Rainfall Outlook & Discussion:
https://www.wpc.ncep.noaa.gov/discussions/hpcdiscussions.php?disc=qpferd
https://www.wpc.ncep.noaa.gov/qpf/excessive_rainfall_outlook_ero.php

SPC Day-2 Convective Outlook:
https://www.spc.noaa.gov/products/outlook/archive/2023/day2otlk_20230720_1730.html

Respectfully Submitted,

Robert Macedo (KD1CY)
ARES SKYWARN Coordinator
Eastern Massachusetts ARES Section Emergency Coordinator
Home Phone #: (508) 994-1875
Home/Data #: (508) 997-4503
Email Address: rmacedo@rcn.com
https://ares.ema.arrl.org
https://www.wx1box.org
Like us on Facebook – https://www.facebook.com/wx1box
Follow us on Twitter – https://twitter.com/wx1box
Subscribe on YouTube – https://www.youtube.com/@wx1box-nwsboston-amateur-radio

Hello to all…

..Isolated to Scattered Strong to Severe Thunderstorms possible particularly across Western and Central Massachusetts and North-Central Connecticut this Tuesday Afternoon and Evening with strong to damging winds, hail, frequent lightning and heavy rainfall with the potential of urban, poor drainage, river and stream flooding. The Storm Prediction Center (SPC) has a slight risk for severe weather in Norhwest Massachusetts with a marginal risk of severe weather through West-Central Massachusetts and Northwest Connecticut with the Weather Prediction Center (WPC) having a similar area in a marginal to slight risk of flash flooding..
..A Flood Watch is in effect from through Tuesday Evening for Hartford County Connecticut, Franklin, Hampshire, Hampden, Northern Worcester and Northern Middlesex Counties of Massachusetts for excessive rainfall and prior heavy rainfall resulting in flooding of urban, poor drainage areas, rivers and streams..
..SKYWARN Self-Activation will monitor the severe weather and flash flood potential for this Tuesday Afternoon and Evening. This will be the only coordination message as we are in operations mode. Below is the NWS Boston/Norton Flood Watch Statement, Enhanced Hazardous Weather Outlook, SPC Day-1 Convective Outlook and WPC Excessive Rainfall Outlook..

NWS Boston/Norton Flood Watch Statement:
https://forecast.weather.gov/product.php?site=NWS&issuedby=BOX&product=FFA&format=CI&version=1&glossary=1&highlight=off

NWS Boston/Norton Area Forecast Discussion:
https://forecast.weather.gov/product.php?site=NWS&issuedby=BOX&product=AFD&format=CI&version=1&glossary=1&highlight=off

NWS Boston/Norton Enhanced Hazardous Weather Outlook:
https://www.weather.gov/erh/ghwo?wfo=box

WPC Day-1 Excessive Rainfall Outlook & Discussion:
https://www.wpc.ncep.noaa.gov/discussions/hpcdiscussions.php?disc=qpferd
https://www.wpc.ncep.noaa.gov/qpf/excessive_rainfall_outlook_ero.php

SPC Day-1 Convective Outlook:
https://www.spc.noaa.gov/products/outlook/day1otlk.html

Respectfully Submitted,

Robert Macedo (KD1CY)
ARES SKYWARN Coordinator
Eastern Massachusetts ARES Section Emergency Coordinator
Home Phone #: (508) 994-1875
Home/Data #: (508) 997-4503
Email Address: rmacedo@rcn.com
https://ares.ema.arrl.org
https://www.wx1box.org
Like us on Facebook – https://www.facebook.com/wx1box
Follow us on Twitter – https://twitter.com/wx1box
Subscribe on YouTube – https://www.youtube.com/@wx1box-nwsboston-amateur-radio

Hello to all…

..Relentless heavy rainfall for portions of Southern New England will become much more widespread on Sunday with a significant flash flood threat to urban, poor drainage areas, rivers and streams from thunderstorms with frequent lightning and heavy downpours and a secondary threat for isolated to scattered strong to severe thunderstorms with strong to damaging winds, hail and even a isolated weak tornado as a secondary threat..
..A Flood Watch is in effect from 2 AM Sunday through late Sunday Night for all of Southern New England except for Plymouth County Massachusetts, Cape Cod and the Islands for excessive runoff from heavy rainfall may cause flooding of small creeks, streams, urban and poor drainage areas, highways, and low lying spots along with 1-2″ per hour rainfall rates..
..The Weather Prediction Center (WPC) has placed much of Southern New England in a Moderate Risk for Excessive Rainfall and the remaining eastern parts of the region in a slight risk of excessive rainfall for Sunday..
..The Storm Prediction Center (SPC) has expanded the marginal risk for severe weather for Sunday to all of Southern New England..
..SKYWARN Activation with Amateur Radio Operations at NWS Boston/Norton will commence no later than 9 AM for this potentially significant flood event and the secondary threat for severe weather. ARES/RACES groups should closely monitor the progress of Sunday’s weather and seek advice on any activation for this situation. Pictures and videos of flooding and storm damage can be sent as a reply to this message, via our WX1BOX Facebook and Twitter feeds or via the email address pics@nsradio.org with credit being given to the spotter unless otherwise indicated..

A relentless pattern for heavy rainfall, thunderstorms, flooding as the primary threat with isolated to scattered strong to severe thunderstorms as a secondary threat continues particularly for Sunday. Sunday needs to be monitored for significant flooding impacts for the region. The headlines depict the current thinking. Key factors include:

1.) There will be a widespread 1-3″ rainfall but there will be enhanced areas of 3-5″+ rainfall. If this heavier rainfall falls over metro/urbanized areas and/or areas hardest hit by heavy rainfall over the last 2 weeks, it will have the potential to cause a high impact in parts of our coverage area.
2.) The severe weather potential is a secondary threat but any sunshine that increases instability coupled with sufficient wind shear profiles would increase the severe weather potential and NWS Boston/Norton in coordination with SPC has expanded the marginal risk for severe weather to all of Southern New England.
3.) Rain Gauge and flood reports, pictures and videos will be key to closely monitor the impacts of flooding and always are helpful for any severe thunderstorm wind damage.

SKYWARN Activation with Amateur Radio Operations at NWS Boston/Norton will commence no later than 9 AM for this potentially significant flood event and the secondary threat for severe weather. ARES/RACES groups should closely monitor the progress of Sunday’s weather and seek advice on any activation for this situation. Pictures and videos of flooding and storm damage can be sent as a reply to this message, via our WX1BOX Facebook and Twitter feeds or via the email address pics@nsradio.org with credit being given to the spotter unless otherwise indicated. Another coordination message will be posted by 10 AM Sunday depending on what level of activity operations are at during the early morning hours tomorrow. Below is the NWS Boston/Norton Flood Watch Statement & Map, Area Forecast Discussion, Enhanced Hazardous Weather Outlook, WPC Day-2 Excessive Rainfall Outlook & Discussion and SPC Day-2 Convective Outlook:

NWS Boston/Norton Flood Watch Statement & Map:
https://forecast.weather.gov/product.php?site=NWS&issuedby=BOX&product=FFA&format=CI&version=1&glossary=1&highlight=off
https://wx1box.org/wp-content/uploads/2023/07/Flood-Watch.png

NWS Boston/Norton Area Forecast Discussion:
https://forecast.weather.gov/product.php?site=NWS&issuedby=BOX&product=AFD&format=CI&version=1&glossary=1&highlight=off

NWS Boston/Norton Enhanced Hazardous Weather Outlook:
https://www.weather.gov/erh/ghwo?wfo=box

WPC Day-2 Excessive Rainfall Outlook & Discussion:
https://www.wpc.ncep.noaa.gov/discussions/hpcdiscussions.php?disc=qpferd
https://www.wpc.ncep.noaa.gov/qpf/excessive_rainfall_outlook_ero.php

SPC Day-2 Convective Outlook:
https://www.spc.noaa.gov/products/outlook/archive/2023/day2otlk_20230715_1730.html

Respectfully Submitted,

Robert Macedo (KD1CY)
ARES SKYWARN Coordinator
Eastern Massachusetts ARES Section Emergency Coordinator
Home Phone #: (508) 994-1875
Home/Data #: (508) 997-4503
Email Address: rmacedo@rcn.com
https://ares.ema.arrl.org
https://www.wx1box.org
Like us on Facebook – https://www.facebook.com/wx1box
Follow us on Twitter – https://twitter.com/wx1box
Subscribe on YouTube – https://www.youtube.com/@wx1box-nwsboston-amateur-radio

Hello to all…

..Relentless heavy rainfall for portions of Southern New England will be isolated on Saturday and then become much more widespread on Sunday with a significant flash flood threat to urban, poor drainage areas, rivers and streams from thunderstorms with frequent lightning and heavy downpours and a secondary threat for isolated to scattered strong to severe thunderstorms with strong to damaging winds and hail as a secondary threat..
..The Weather Prediction Center (WPC) has placed much of Southern New England in a Moderate Risk for Excessive Rainfall and the remaining eastern parts of the region in a slight risk of excessive rainfall for Sunday..
..The Storm Prediction Center (SPC) has placed Western Massachusetts and Western Connecticut in a marginal risk for severe weather for Sunday..
..A Flood Watch is now in effect for late tonight through Sunday Night for all of Southern New England except for Plymouth County Massachusetts, Cape Cod and the Islands for excessive runoff from heavy rainfall may cause flooding of small creeks, streams, urban and poor drainage areas, highways, and low lying spots along with 1-2″ per hour rainfall rates..
..SKYWARN Activation with Amateur Radio Operations at NWS Boston/Norton are likely for this potentially significant flood event. ARES/RACES groups should closely monitor the progress of Sunday’s weather and seek advice on any activation for this situation. Pictures and videos of flooding and storm damage can be sent as a reply to this message, via our WX1BOX Facebook and Twitter feeds or via the email address pics@nsradio.org with credit being given to the spotter unless otherwise indicated..

A relentless pattern for heavy rainfall, thunderstorms, flooding as the primary threat with isolated to scattered strong to severe thunderstorms as a secondary threat continues particularly for Sunday with isolated to scattered activity on Saturday. Sunday needs to be monitored for significant flooding impacts for the region. The headlines depict the current thinking. Key factors include:

1.) There will be a widespread 1-3″ rainfall but there will be enhanced areas of 3″ and more rainfall. If this heavier rainfall falls over metro/urbanized areas and/or areas hardest hit by heavy rainfall over the last 2 weeks, it will have the potential to cause a high impact in parts of our coverage area.
2.) The severe weather potential is a secondary threat but any sunshine that increases instability coupled with sufficient wind shear profiles would increase the severe weather potential.
3.) Rain Gauge and flood reports, pictures and videos will be key to closely monitor the impacts of flooding.

SKYWARN Activation with Amateur Radio Operations at NWS Boston/Norton are likely for this potentially significant flood event. ARES/RACES groups should closely monitor the progress of Sunday’s weather and seek advice on any activation for this situation. Pictures and videos of flooding and storm damage can be sent as a reply to this message, via our WX1BOX Facebook and Twitter feeds or via the email address pics@nsradio.org with credit being given to the spotter unless otherwise indicated. Below is the NWS Boston/Norton Flood Watch Statement & Map, Area Forecast Discussion, Enhanced Hazardous Weather Outlook, WPC Day-2 Exessive Rainfall Outlook & Discussion and SPC Day-2 Convective Outlook:

NWS Boston/Norton Flood Watch Statement & Map:
https://forecast.weather.gov/product.php?site=NWS&issuedby=BOX&product=FFA&format=CI&version=1&glossary=1&highlight=off
https://wx1box.org/wp-content/uploads/2023/07/Flood-Watch.png

NWS Boston/Norton Area Forecast Discussion:
https://forecast.weather.gov/product.php?site=NWS&issuedby=BOX&product=AFD&format=CI&version=1&glossary=1&highlight=off

NWS Boston/Norton Enhanced Hazardous Weather Outlook:
https://www.weather.gov/erh/ghwo?wfo=box

WPC Day-2 Excessive Rainfall Outlook & Discussion:
https://www.wpc.ncep.noaa.gov/discussions/hpcdiscussions.php?disc=qpferd
https://www.wpc.ncep.noaa.gov/qpf/excessive_rainfall_outlook_ero.php

SPC Day-2 Convective Outlook:
https://www.spc.noaa.gov/products/outlook/archive/2023/day2otlk_20230715_0600.html

Respectfully Submitted,

Robert Macedo (KD1CY)
ARES SKYWARN Coordinator
Eastern Massachusetts ARES Section Emergency Coordinator
Home Phone #: (508) 994-1875
Home/Data #: (508) 997-4503
Email Address: rmacedo@rcn.com
https://ares.ema.arrl.org
https://www.wx1box.org
Like us on Facebook – https://www.facebook.com/wx1box
Follow us on Twitter – https://twitter.com/wx1box
Subscribe on YouTube – https://www.youtube.com/@wx1box-nwsboston-amateur-radio

Hello to all…

..Overnight thunderstorms with frequent lighting and heavy downpours threaten to renew urban, poor drainage, river and stream flooding in portions of Western and Central Massachusetts, Connecticut, Rhode Island and into parts of Southeast Massachusetts bordering Rhode Island. A secondary threat for isolated to scattered strong to severe thunderstorms with strong to damaging winds, and hail also exists from early evening through late tonight. Additional chances for thunderstorms with heavy downpours and isolated to scattered strong to severe thunderstorms are possible through the weekend into early next week..
..A Flood Watch is now in effect from 5 PM Thursday Evening through late tonight for Hartford, Tolland Counties Connecticut, Franklin, Hampden and Hampshire Counties of Massachusetts and from 11 PM Thursday Evening through late tonight for Rhode Island, Worcester, Western Norfolk, and Bristol Counties of Massachusetts for localized heavy rainfall exacerbated by recent wet conditions causing renewed flash flooding of urban, poor drainage areas, rivers and streams..
..The Weather Prediction Center (WPC) has much of Southern New England in a marginal to slight risk for excessive rainfall for Thursday through Sunday with the category varying between marginal and slight depending on which day during this period..
..The Storm Prediction Center (SPC) has a marginal risk for severe weather through early Friday Morning for Western Massachusetts and Western Connecticut and a marginal risk for severe weather for Western and Central Massachusetts through Connecticut and Rhode Island for the remainder of Friday through Friday Evening..
..SKYWARN Self-Activation will monitor the severe weather and flood potential Thursday evening through Sunday Evening..

A relentless pattern of thunderstorms, heavy downpours and isolated to scattered strong to severe thunderstorms will resume later Thursday through Sunday Evening around the region. The headlines depict the current thinking. Key factors include:

1.) Thunderstorm intensity later this evening and overnight will hinge on remaining instability past peak heating and the wind shear profiles as the thunderstorms move in the region.
2.) The initial thunderstorms may be progressive overnight but additional thunderstorm activity will continue on Friday. These thunderstorms if they train over an area hard hit from the last few weeks will renew flooding fairly rapidly in a given area and this will be monitored.
3.) Additional thunderstorm and excessive rainfall potential will continue through at least Sunday Evening. Previous day’s thunderstorms and convection will determine how the next day’s thunderstorm and convection potential unfolds.

SKYWARN Self-Activation will monitor the severe weather and flood potential Thursday evening through Sunday Evening. The next coordination message will likely be some time between 8 AM and 1 PM Friday. Below is the NWS Boston/Norton Flood Watch Statement, Area Forecast Discussion, Enhanced Hazardous Weather Outlook, WPC Day-1 and Day-2 Excessive Rainfall Outlook and SPC Day-1 and Day-2 Convective Outlook:

NWS Boston/Norton Flood Watch Statement:
https://forecast.weather.gov/product.php?site=NWS&issuedby=BOX&product=FFA&format=CI&version=1&glossary=1&highlight=off

NWS Boston/Norton Area Forecast Discussion:
https://forecast.weather.gov/product.php?site=NWS&issuedby=BOX&product=AFD&format=CI&version=1&glossary=1&highlight=off

NWS Boston/Norton Enhanced Hazardous Weather Outlook:
https://www.weather.gov/erh/ghwo?wfo=box

WPC Day-1 and Day-2 Excessive Rainfall Outlooks:
https://www.wpc.ncep.noaa.gov/discussions/hpcdiscussions.php?disc=qpferd
https://www.wpc.ncep.noaa.gov/qpf/excessive_rainfall_outlook_ero.php

SPC Day-1 and Day-2 Convective Outlooks:
https://www.spc.noaa.gov/products/outlook/day1otlk.html
https://www.spc.noaa.gov/products/outlook/archive/2023/day2otlk_20230713_1730.html

Respectfully Submitted,

Robert Macedo (KD1CY)
ARES SKYWARN Coordinator
Eastern Massachusetts ARES Section Emergency Coordinator
Home Phone #: (508) 994-1875
Home/Data #: (508) 997-4503
Email Address: rmacedo@rcn.com
https://ares.ema.arrl.org
https://www.wx1box.org
Like us on Facebook – https://www.facebook.com/wx1box
Follow us on Twitter – https://twitter.com/wx1box
Subscribe on YouTube – https://www.youtube.com/@wx1box-nwsboston-amateur-radio

Hello to all…

..Significant flash flooding impacted portions of Western Connecticut, Western and Central Massachusetts, Northern Rhode Island in the Sunday Afternoon through Monday Evening with the highest impacts on Monday for Western and Central Massachusetts, and Northern Rhode Island on Monday. Even higher flash flooding impacts occurred in Vermont and parts of New Hampshire..
..Some area rivers will not crest until later today in portions of Western Massachusetts and Western Connecticut. Any post storm final rain gauge reports, flood pictures/videos and damage will be helpful and can be sent as a reply to this message, via our WX1BOX Facebook and Twitter feeds or to the email address pics@nsradio.org with credit to the SKYWARN Spotter/Amateur Radio given unless otherwise indicated. This can include pictures/reports/damage from neighboring Vermont and New Hampshire to assist those areas as well. After a couple dry days Tuesday through Wednesday, more showers and thunderstorms could occur in the Thursday through Saturday period so the more data and pictures/videos of conditions, it will help understanding how future rainfall will impact area rivers and streams..
..Another post storm/severe weather coordination message will be posted by Wednesday Morning. Below is the log of all rain gauge and flood reports currently received, NWS Boston/Norton Public Info Statement and Local Storm Report on this event and a message from the US Army Corps of Engineers on a couple dams in the area..

WX1BOX Amateur Radio/Non-Amateur Radio SKYWARN Spotter Reports:
https://wx1box.org/wp-content/uploads/2023/07/reports_7_10_23.pdf

NWS Boston/Norton Public Information Statement:
https://wx1box.org/wp-content/uploads/2023/07/PNS_BOX_7_10_23.pdf

NWS Boston/Norton Local Storm Report:
https://wx1box.org/wp-content/uploads/2023/07/LSR_BOX_7_10_23.pdf

US Army Corps of Engineer Message on Ball Mountain Dam Townshend Dam:
https://www.nae.usace.army.mil/Missions/Recreation/Ball-Mountain-Lake/

Respectfully Submitted,

Robert Macedo (KD1CY)
ARES SKYWARN Coordinator
Eastern Massachusetts ARES Section Emergency Coordinator
Home Phone #: (508) 994-1875
Home/Data #: (508) 997-4503
Email Address: rmacedo@rcn.com
https://ares.ema.arrl.org
https://www.wx1box.org
Like us on Facebook – https://www.facebook.com/wx1box
Follow us on Twitter – https://twitter.com/wx1box
Subscribe on YouTube – https://www.youtube.com/@wx1box-nwsboston-amateur-radio

Hello to all…

..Thunderstorms and heavy convective showers will bring a renewed threat of flooding and flash flooding particularly to Western and Central Massachusetts and Northern Connecticut though all areas of Southern New England should monitor this potential. There is also a secondary threat for isolated to scattered strong to severe thunderstorms with strong to damaging winds, hail and frequent lightning for Sunday Afternoon, Sunday Evening and on Monday..
..A Flood Watch is now in effect through Tuesday Morning for Northern Connecticut, Western and Central Massachusetts to include Berkshire, Hampshire, Hampden, Franklin, Worcester and Northern Middlesex Counties of Massachusetts for rainfall of 2-4″ with isolated locations or an axis of rainfall that could be 5″ or more in areas that get thunderstorms and heavy rainfall that train over the same areas. This additional rainfall coupled with the rainfall of the last week could cause urban and poor drainage flooding as well as small river and stream flooding in this region..
..The Weather Prediction Center (WPC) has placed much of the Flood Watch area and portions just east of the Flood Watch in a Slight to Moderate risk of excessive rainfall for Sunday through early Tuesday Morning..
..The Storm Prediction Center (SPC) has areas of extreme Western Massachusetts and Western Connecticut in a marginal risk for severe weather Sunday and Western and Central Massachusetts, Connecticut, and Rhode Island in a marginal risk for severe weather for Monday..
..SKYWARN Self-Activation will monitor the flooding and severe weather potential Sunday through early Tuesday Morning. Picture of storm damage or flooding can be sent to our WX1BOX Facebook/Twitter social media feeds, as a reply to this message or to the email address pics@nsradio.org with credit given to the spotter on the photos unless otherwise indicated..

An active weather pattern has resumed across the area. On Saturday, localized flash flooding occurred in parts of Western Massachusetts and in Suffield, CT. Reports from this event can be seen below:
https://wx1box.org/wp-content/uploads/2023/07/reports_7_8_23.pdf

The headlines depict the current thinking on the primary risk for flooding and flash flooding in the region with a secondary risk for isolated to scattered strong to severe thunderstorms later Sunday Afternoon through early Tuesday Morning. Key factors include:

1.) There will be an axis of very heavy rainfall potentially of 5″ or more within the more general area of 2-4″ rainfall in the Flood Watch area. Where that sets up will be fine-tuned in future updates. If this affects metro areas and areas that have had the heavy rainfall over the past week, that will create greater impacts for parts of the region for higher impact flooding of urban and poor drainage areas as well as smaller streams and rivers.
2.) For areas outside of the Flood Watch, this rainfall and axis of heavy rainfall could affect portions of Eastern Massachusetts and Rhode Island depending on the low pressure system track and these areas should monitor, particularly those that were hit hard from early last week’s flash flooding and thunderstorms with heavy rainfall and in metro areas more prone to urban and poor drainage flooding.
3.) The severe weather potential is a secondary threat but one that will also bear close watching. Instability will likely be less due to heavy rainfall and ongoing thunderstorms but wind shear profiles will be stronger and could compensate for less instability.

SKYWARN Self-Activation will monitor the flooding and severe weather potential Sunday through early Tuesday Morning. Picture of storm damage or flooding can be sent to our WX1BOX Facebook/Twitter social media feeds, as a reply to this message or to the email address pics@nsradio.org with credit given to the spotter on the photos unless otherwise indicated. Another coordination message will be posted by 11 PM Sunday Evening if time allows pending any ongoing flood and severe weather operations for later Sunday Afternoon and Evening. Below is the NWS Boston Norton Flood Watch Statement & Map, Rainfall Map, Area Forecast Discussion, Enhanced Hazardous Weather Outlook, WPC Day-1 & Day-2 Excessive Rainfall Outlooks and SPC Day-1 and Day-2 Convective Outlooks:

NWS Boston/Norton Flood Watch Statement & Map:
https://forecast.weather.gov/product.php?site=NWS&issuedby=BOX&product=FFA&format=CI&version=1&glossary=1&highlight=off
https://wx1box.org/wp-content/uploads/2023/07/ffa.png

NWS Boston/Norton Rainfall Map:
https://wx1box.org/wp-content/uploads/2023/07/QPF.png

NWS Boston/Norton Area Forecast Discussion:
https://forecast.weather.gov/product.php?site=NWS&issuedby=BOX&product=AFD&format=CI&version=1&glossary=1&highlight=off

NWS Boston/Norton Enhanced Hazardous Weather Outlook:
https://www.weather.gov/erh/ghwo?wfo=box

WPC Day-1 and Day-2 Excessive Rainfall Outlooks:
https://www.wpc.ncep.noaa.gov/discussions/hpcdiscussions.php?disc=qpferd
https://www.wpc.ncep.noaa.gov/qpf/excessive_rainfall_outlook_ero.php

SPC Day-1 and Day-2 Convective Outlooks:
https://www.spc.noaa.gov/products/outlook/day1otlk.html
https://www.spc.noaa.gov/products/outlook/day2otlk.html

Respectfully Submitted,

Robert Macedo (KD1CY)
ARES SKYWARN Coordinator
Eastern Massachusetts ARES Section Emergency Coordinator
Home Phone #: (508) 994-1875
Home/Data #: (508) 997-4503
Email Address: rmacedo@rcn.com
https://ares.ema.arrl.org
https://www.wx1box.org
Like us on Facebook – https://www.facebook.com/wx1box
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Hello to all…

..Thunderstorms with frequent lightning and heavy rainfall leading to urban and poor drainage flooding as a primary risk with a secondary risk for isolated strong to severe thunderstorms with strong to damaging winds and hail are possible across Southern New England particularly for Western and Central Massachusetts along and west of the I-495 corridor, Northern Connecticut, and Northwest Rhode Island for this Saturday Afternoon and Evening..
..Additional thunderstorms with heavy rainfall, potential flooding concerns and an isolated strong to severe thunderstorm risk will continue for the Sunday Afternoon through early Monday Evening period as well and this will be detailed in future coordination messages. This is a similar pattern to what occurred on Sunday 7/2-Tuesday 7/4 time period..
..SKYWARN Self-Activation will monitor the flooding and severe weather potential focusing on Saturday Afternoon and Evening to start and then Sunday into Monday time periods..

We are entering another active period of weather for Southern New England for the Saturday through Monday Evening timeframe. The headlines reflect current thinking with more details on the Sunday to Monday period to follow in future coordination messages. Key factors for today’s flooding and severe weather potential include:

1.) Thunderstorms and their ability to train over the same area and in areas that received heavier rainfall earlier this week will dictate the level of flooding concerns. This is especially true if the thunderstorms train over urbanized metro areas.
2.) Ability for instability to overcome low wind shear values for any stronger to isolated severe thunderstorms to form over the area and the potential for isolated wet microburst wind damage.

SKYWARN Self-Activation will monitor the flooding and severe weather potential focusing on Saturday Afternoon and Evening to start and then Sunday into Monday time periods. Another coordination message will be posted on the Sunday to Monday flooding and severe weather potential by 11 PM Saturday Evening. Below is the NWS Boston/Norton Area Forecast Discussion and Enhanced Hazardous Weather Outlook:

NWS Boston/Norton Area Forecast Discussion:
https://forecast.weather.gov/product.php?site=NWS&issuedby=BOX&product=AFD&format=CI&version=1&glossary=1&highlight=off

NWS Boston/Norton Enhanced Hazardous Weather Outlook:
https://www.weather.gov/erh/ghwo?wfo=box

Respectfully Submitted,

Robert Macedo (KD1CY)
ARES SKYWARN Coordinator
Eastern Massachusetts ARES Section Emergency Coordinator
Home Phone #: (508) 994-1875
Home/Data #: (508) 997-4503
Email Address: rmacedo@rcn.com
https://ares.ema.arrl.org
https://www.wx1box.org
Like us on Facebook – https://www.facebook.com/wx1box
Follow us on Twitter – https://twitter.com/wx1box
Subscribe on YouTube – https://www.youtube.com/@wx1box-nwsboston-amateur-radio