Severe Weather and Heat Coordination Message #2 – Tuesday 7/28/20 Heat and Severe Weather Potential

Hello to all…

..Intense Heat and Humidity Across the Region through Tuesday Evening. A cold front will bring the risk for isolated to scattered strong to severe thunderstorms across much of Southern New England for late Tuesday Morning through Tuesday Night. Strong to damaging winds, hail, frequent lightning and heavy downpours leading to urban and poor drainage flooding will be the main threats. The Storm Prediction Center (SPC) has continued much of Southern New England in a marginal risk for severe weather for Tuesday..
..A Heat Advisory is in effect through 8 PM Tuesday for the entire NWS Boston/Norton Coverage area except for Block Island, Marthas Vineyard, Nantucket, Western Hampden, Western Hampshire, Franklin County Massachusetts for heat indices of 99-100 degrees. Anyone in the heat advisory area in particular but any part of Southern New England should drink plenty of liquids and avoid overexertion in the heat..
..SKYWARN Self-Activation will monitor the severe weather potential for Tuesday Afternoon through Tuesday Night..

Intense heat and humidity will be in place across Southern New England through Tuesday Evening and heat advisories remain in effect for much of Southern New England through Tuesday Evening. A cold front will bring the risk for isolated to scattered strong to severe thunderstorms across much of Southern New England. The headlines depict the latest thinking. Key factors in the severe weather potential include:

1.) The timing of the cold front and that there is sufficient heating and destabilization ahead of the front. Given very warm low temperatures and at least some level of sunshine ahead of the front, even a late morning to mid afternoon timeframe for frontal passage as some models show versus Tuesday early to mid afternoon to evening will likely still allow for isolated to scattered strong to severe thunderstorm development.
2.) Sufficient wind shear overlapping with the front and enough instability to overcome less favorable factors for severe weather in the mid levels of the atmosphere.

SKYWARN Self-Activation will monitor the severe weather potential for Tuesday Afternoon through Tuesday Night. Another coordination message will be posted by 1000 AM Tuesday Morning. Below is the Below is the NWS Boston/Norton Heat Advisory Statement, Area Forecast Discussion, Enhanced Hazardous Weather Outlook, NWS Boston/Norton Facebook Infographics on the heat, NWS Heat Safety Tips and SPC Day-2 Convective Outlook:

NWS Boston/Norton Heat Advisory Statement:
https://kamala.cod.edu/ma/latest.wwus71.KBOX.html

NWS Boston/Norton Area Forecast Discussion:
https://kamala.cod.edu/ma/latest.fxus61.KBOX.html

NWS Boston/Norton Experimental Enhanced Hazardous Weather Outlook:
https://www.weather.gov/box/ehwo

NWS Boston/Norton Facebook Infographics:
https://www.facebook.com/NWSBoston/photos/pcb.3152067648220918/3152065598221123/?type=3&theater

NWS Heat Safety Tips:
https://www.weather.gov/safety/heat

SPC Day-2 Convective Outlook:
https://www.spc.noaa.gov/products/outlook/archive/2020/day2otlk_20200727_1730.html

Respectfully Submitted,

Robert Macedo (KD1CY)
ARES SKYWARN Coordinator
Eastern Massachusetts ARES Section Emergency Coordinator
Home Phone #: (508) 994-1875 (After 6 PM)
Home/Data #: (508) 997-4503 (After 6 PM)
Work Phone #: 508-346-2929 (8 AM-5 PM)
Email Address: rmacedo@rcn.com
http://ares.ema.arrl.org
http://www.wx1box.org
Like us on Facebook – http://www.facebook.com/wx1box
Follow us on Twitter – http://twitter.com/wx1box