Severe Weather Coordination Message #1 – Friday 7/16/21 Severe Weather Potential
Hello to all…
..Isolated to scattered strong to severe thunderstorms are possible across interior Massachusetts and Northern Rhode Island along and north and west of a Boston to Providence line and through Northern Connecticut Friday Afternoon and Evening where the Storm Prediction Center (SPC) has placed this area in a marginal risk for severe weather. Strong to damaging winds, hail, frequent lightning and heavy rainfall with urban and poor drainage flooding are the primary threats. Timeframe for the severe weather potential is 1-9 PM EDT Friday..
..SKYWARN Self-Activation will monitor the severe weather potential for Friday Afternoon and Evening..
Intense heat and humidity will affect the region Friday Afternoon and Evening with an impulse in the atmosphere near the time of peak heating to allow for the formation of isolated to scattered strong to severe thunderstorms across the region. The headlines depict the current thinking. Key factors include:
1.) Dry air in the upper levels of the atmosphere and what role it plays in convection. It could enhance damaging wind potential if storms can develop but too much dry air could cap the development of strong to severe thunderstorms in the region.
2.) The ability of intense heat and humidity to offset dry air in the upper levels of the atmosphere along with the impulse atmosphere to be a sufficient trigger for strong to severe thunderstorm development.
SKYWARN Self-Activation will monitor the severe weather potential for Friday Afternoon and Evening. Another coordination message on Friday’s severe weather potential will be posted by 11 AM EDT Friday Morning. Below are the NWS Boston/Norton Area Forecast Discussion, Enhanced 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:
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: email@example.com
Like us on Facebook – http://www.facebook.com/wx1box
Follow us on Twitter – http://twitter.com/wx1box