Severe Weather Coordination Message #2 – Thursday 7/27/23 Severe Weather & Flash Flood Potential
Hello to all…
..Renewed threat for severe weather across all of Southern New England with flash flooding potential in interior parts of Massachusetts hard hit by recent severe weather and flash flood events for Thursday Afternoon and Evening. This has the potential to be a significant severe weather outbreak for interior Southern New England. Oppressive Heat and Humidity is also expected in the Thursday through Saturday timeframe..
..The Storm Prediction Center (SPC) has continued much of Southern New England in a slight risk for severe weather for Thursday Afternoon and Evening for scattered to numerous strong to severe thunderstorms with strong to damaging winds, hail and heavy rainfall leading to flash flooding of urban/poor drainage areas, rivers and streams as the main threat with isolated tornadoes as a secondary threat. The timeframe for severe weather potential is from 12-9 PM Thursday and SPC has sent a mesoscale convective discussion for an 80% chance of a watch for the region..
..The Weather Prediction Center (WPC) has placed interior Southern New England from a Boston to Providence line west and north into a marginal to slight risk of excessive rainfall for Thursday Afternoon and Evening..
..A Flood Watch is now in effect from Thursday Morning through Thursday Evening for the entire NWS Norton coverage area except for Cape Cod and the Islands and Washington County RI for excessive rainfall leading to flooding of urban and poor drainage areas, small rivers and streams..
..A Heat Advisory is in effect from 11 AM Thursday Morning to 8 PM Saturday Evening for the entire NWS Norton Coverage area except for the East Slopes of the Berkshires and Cape Cod and the Islands for heat indices up to 100 degrees..
..Due to the potential for severe weather Thursday and severe weather potential for Friday and Saturday, Post messages on the prior flood and severe weather events will be posted by Sunday 7/30/23 or Monday 7/31/23..
..SKYWARN Activation with Amateur Radio at NWS will be active by 1 PM EDT this Thursday Afternoon. Pictures, videos and reports on severe weather/flooding for the upcoming 7/27/23 severe weather/flood event can be sent as a reply to this message, via our WX1BOX Facebook/Twitter feeds or to the email address pics@nsradio.org with credit given to the spotter for the picture/video unless otherwise indicated..
Another severe weather and flood event affected the region Tuesday Afternoon and Evening 7/25/23. Below are the summary reports on the events Tuesday:
WX1BOX Amateur Radio Log of Amateur Radio and non-Amateur Radio SKYWARN Spotter Reports – Tuesday 7/25/23 Severe Weather Event:
https://wx1box.org/wp-content/uploads/2023/07/reports_7_25_23.pdf
NWS Boston/Norton Local Storm Report – Tuesday 7/25/23 Severe Weather Event:
https://wx1box.org/wp-content/uploads/2023/07/LSR-from-KBOX-7_25_23.pdf
NWS Boston/Norton Public Information Statement – Tuesday 7/25/23 Severe Weather Event:
https://wx1box.org/wp-content/uploads/2023/07/PNS-from-KBOX-7_25_23.pdf
Any pictures, videos and reports on severe weather/flooding from Tuesday 7/25/23, can be sent as a reply to this message, via our WX1BOX Facebook/Twitter feeds or to the email address pics@nsradio.org with credit given to the spotter for the picture/video unless otherwise indicated.
Yet another in a series of severe weather and flash flood events could potentially occur during Thursday Afternoon and Evening. The timeframe for severe weather potential is from 12-9 PM Thursday and SPC has sent a mesoscale convective discussion for an 80% chance of a watch for the region. This has the potential to be a significant severe weather outbreak for the region. Key factors include:
1.) Cloud debris which is moving out as forecasted today and heating is taking place as expected though this will bear close watching that it continues as expected for the day.
2.) Timing of any thunderstorm development near or shortly after the time of peak heating
SKYWARN Activation with Amateur Radio at NWS will be active by 1 PM EDT this Thursday Afternoon. Pictures, videos and reports on severe weather/flooding for the upcoming 7/27/23 severe weather/flood event can be sent as a reply to this message, via our WX1BOX Facebook/Twitter feeds or to the email address pics@nsradio.org with credit given to the spotter for the picture/video unless otherwise indicated. This will be the last coordination message as we shift into operations mode. Below is the NWS Boston/Norton Area Forecast Discussion, Enhanced Hazardous Weather Outlook, SPC Day-1 Convective Outlook, SPC Mesoscale Convective Discussion and WPC Excessive Rainfall Outlook and Discussion:
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
SPC Mesoscale Convective Discussion:
https://www.spc.noaa.gov/products/md/md1736.html
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
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
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