301
WWUS20 KWNS 171826
SEL1
SPC WW 171826
MEZ000-NHZ000-NYZ000-VTZ000-180100-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 521
NWS STORM PREDICTION CENTER NORMAN OK
225 PM EDT THU JUL 17 2025
THE NWS STORM PREDICTION CENTER HAS ISSUED A
* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
WESTERN AND NORTHERN MAINE
NORTHERN AND CENTRAL NEW HAMPSHIRE
FAR NORTHERN NEW YORK
NORTHERN AND CENTRAL VERMONT
* EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 225 PM UNTIL
900 PM EDT.
* PRIMARY THREATS INCLUDE...
SCATTERED DAMAGING WIND GUSTS TO 65 MPH POSSIBLE
A TORNADO OR TWO POSSIBLE
SUMMARY...SCATTERED THUNDERSTORMS ARE FORECAST TO DEVELOP AND
INTENSIFY THIS AFTERNOON ACROSS THE WATCH AREA. A COUPLE OF
TRANSIENT SUPERCELLS ARE POSSIBLE AS WELL AS A FEW ORGANIZED
MULTICELLS. THE PRIMARY SEVERE HAZARD WILL BE STRONG TO SEVERE
GUSTS (50-65 MPH) CAPABLE OF WIND DAMAGE, BUT A TORNADO IS POSSIBLE
WITH THE MORE INTENSE TRANSIENT SUPERCELLS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75
STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES NORTH NORTHWEST
OF CARIBOU ME TO 15 MILES SOUTH SOUTHWEST OF MONTPELIER VT. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU1).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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
TORNADOES.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO
1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 55 KNOTS. A FEW
CUMULONIMBI WITH MAXIMUM TOPS TO 400. MEAN STORM MOTION VECTOR
23030.
...SMITH
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