Severe Weather and Flash Flood Coordination Message #1 – Sunday Night 7/11 Through Tuesday Morning 7/12 Severe Weather & Flash Flood Potential
Hello to all…
..Heavy rainfall from showers and thunderstorms expected Sunday Night through Tuesday Morning with the potential for renewed urban, poor drainage river and stream flooding in pockets across Southern New England. The Weather Prediction Center (WPC) has placed much of Southern New England in a slight risk for excessive rainfall for Sunday Night into Monday..
..The Storm Prediction Center (SPC) placing South-Central Connecticut, South-Central Rhode Island and a small portion of south coastal Massachusetts in a marginal risk for severe weather with strong to damaging winds, heavy downpours and frequent lightning as the main threats for Monday Afternoon and Evening. The key factor for any severe weather potential is the position of the warm front and warm sector over the region and whether or not activity stays southwest of this area..
..A Flash Flood Watch is in effect from Monday Afternoon through Tuesday Morning for Northern Connecticut, Rhode Island and Southeast Massachusetts except for Cape Cod and the Islands for 0.50-1.5″ of rainfall with isolated higher amounts. With recent rainfall from Elsa and prior rainfall in July, this rainfall could result in urban, poor drainage, river and stream flooding..
..A Flash Flood Watch is in effect through Monday Evening for Western, Central and Northeast Massachusetts for 1-2″ of rainfall with isolated higher amounts. With recent rainfall from Elsa and prior rainfall in July, this rainfall could result in urban, poor drainage, river and stream flooding..
..SKYWARN Self-Activation will monitor the flooding and severe weather potential for Sunday Night through Tuesday Morning. Another coordination message will be posted some time between Monday Morning to early afternoon depending on how active operations on for any flooding during the first part of this storm event. Below is the NWS Boston/Norton Flash Flood Watch Statement, Area Forecast Discussion, Enhanced Hazardous Weather Outlook, SPC Day-2 Convective Outlook and WPC Day-2 Excessive Rainfall Outlook..
NWS Boston/Norton Flash Flood Watch Statement:
https://kamala.cod.edu/ma/latest.wgus61.KBOX.html
NWS Boston/Norton Area Forecast Discussion:
https://kamala.cod.edu/ma/latest.fxus61.KBOX.html
NWS Boston/Norton Enhanced Hazardous Weather Outlook:
https://www.weather.gov/box/ehwo
SPC Day-2 Convective Outlook:
https://www.spc.noaa.gov/products/outlook/archive/2021/day2otlk_20210711_1730.html
WPC Day-2 Excessive Rainfall Outlook:
https://www.wpc.ncep.noaa.gov/qpf/ero.php?opt=curr&day=2SSS
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
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