SPC Severe Thunderstorm Watch 640

SPC Severe Thunderstorm Watch 640

WW 640 SEVERE TSTM ME NH 131750Z – 140100Z

Severe Thunderstorm Watch Number 640
NWS Storm Prediction Center Norman OK
150 PM EDT Sun Aug 13 2023

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of
Eastern New Hampshire

* Effective this Sunday afternoon and evening from 150 PM until
900 PM EDT.

* Primary threats include…
Scattered damaging wind gusts to 65 mph possible
Scattered large hail events to 1.5 inches in diameter possible

SUMMARY…Scattered thunderstorms are forecast to intensify this
afternoon with the stronger storms being capable of large hail and
damaging gusts. This activity will gradually move from west to east
across the watch area through the afternoon into the early evening.

The severe thunderstorm watch area is approximately along and 70
statute miles east and west of a line from 30 miles northwest of
Caribou ME to 10 miles southeast of Portsmouth NH. For a complete
depiction of the watch see the associated watch outline update


REMEMBER…A Severe Thunderstorm Watch means conditions are
favorable for severe thunderstorms in and close to the watch area.
Persons in these areas should be on the lookout for threatening
weather conditions and listen for later statements and possible
warnings. Severe thunderstorms can and occasionally do produce


AVIATION…A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 55 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector


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