Severe Weather Coordination Message #2 – Wednesday 4/21/21 Severe Weather Potential

Hello to all…

..Isolated to scattered strong to severe thunderstorms possible to likely particularly over Western, Central and Northeast Massachusetts and Northern Connecticut and extreme Northwest Rhode Island Wednesday Afternoon and Evening. Strong to damaging winds, hail, lightning and brief urban and poor drainage flooding would be the main threats between 2-8 PM Wednesday.
..The Storm Prediction Center (SPC) has placed Western, Central and Northeast Massachusetts, Connecticut and extreme Northwest Rhode Island in a marginal to slight risk for severe weather for today,. Key factors in strong to severe thunderstorm development today is the degree of instability available or the amount of forcing to offset limited instability for convective showers and low-topped thunderstorms to organize and maintain their strength into portions of Southern New England to tap into strong wind fields aloft. Reliable models have trended further east with the strong to severe thunderstorm potential overnight into this morning resulting in the upgrade and expansion of the marginal and slight risk areas into our area..
..Potential exists for strong post frontal wind gusts of around 40 MPH with higher gusts possible across much of Southern New England Wednesday Night into Thursday. Separate updates will be posted regarding the strong wind potential later tonight after the severe weather potential has passed..
..SKYWARN Self-Activation will monitor the strong to severe thunderstorm potential for Wednesday. This will be the final coordination message on the severe thunderstorm potential as we shift into operations mode. 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:

NWS Boston/Norton Enhanced Hazardous Weather Outlook:

SPC Day-1 Convective Outlook:

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:
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