Severe Weather Coordination Message #1 – Sunday 5/23/2021 Severe Weather Potential

Hello to all…

..Isolated to Scattered Strong to Severe thunderstorms are possible Sunday Afternoon and Evening anytime between 1-9 PM EDT. Strong to damaging winds, hail, frequent lighting and heavy downpours with minor urban and poor drainage flooding are the main threats. The Storm Prediction Center (SPC) has much of Southern New England in a marginal risk for severe weather for Sunday. In addition, marine areas could see strong straightline winds for a brief period of time even without thunderstorms present and marine interests should monitor..
..SKYWARN Self-Activation will monitor the severe weather potential for Sunday Afternoon through Evening..

Warm and humid conditions will be prevalent across the region Sunday with a strong cold front pushing through the region. This will setup the potential for isolated to scattered strong to severe thunderstorms. The headlines depict the current thinking. Key factors include:

1.) Amount of instability that is generated from daytime heating and any leftover showers and cloud cover from Saturday Evening.
2.) Timing of the cold front through peak heating of the day.
3.) Ability of the forcing of the cold front and favorably strong winds aloft to compensate if instability levels are limited or the timing of the cold front is not near the time of peak heating.

SKYWARN Self-Activation will monitor the severe weather potential for Sunday Afternoon through Evening. Another Coordination message will be posted by 10 AM Sunday Morning. Below is the NWS Boston/Norton Area Forecast Discussion, Hazardous Weather Outlook and SPC Day-2 Convective Outlook:

NWS Boston/Norton Area Forecast Discussion:

NWS Boston/Norton Enhanced Hazardous Weather Outlook:

SPC Day-2 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:
Like us on Facebook –
Follow us on Twitter –