656
ACUS11 KWNS 172244
SWOMCD
SPC MCD 172243
MEZ000-NHZ000-VTZ000-180015-
MESOSCALE DISCUSSION 1703
NWS STORM PREDICTION CENTER NORMAN OK
0543 PM CDT THU JUL 17 2025
AREAS AFFECTED...PORTIONS OF NORTHERN NEW ENGLAND
CONCERNING...SEVERE THUNDERSTORM WATCH 521...
VALID 172243Z - 180015Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 521
CONTINUES.
SUMMARY...STRONG/DAMAGING WINDS WILL REMAIN POSSIBLE INTO PERHAPS
MID EVENING. A BRIEF TORNADO COULD OCCUR IN NORTHEAST MAINE OVER THE
NEXT 1-2 HOURS.
DISCUSSION...THE KCBW VAD DATA CONTINUES TO SHOW LARGE LOW-LEVEL
HODOGRAPHS. CONVECTION IN NORTHEAST MAINE HAS CERTAINLY TRENDED MORE
LINEAR OVER THE PAST FEW HOURS, BUT A FEW MARGINAL SUPERCELLS REMAIN
AND HAVE SHOWN MODERATE LOW-LEVEL ROTATION PERIODICALLY. THESE
STORMS WILL POSE A THREAT FOR DAMAGING WINDS AND A BRIEF TORNADO FOR
ANOTHER 1-2 HOURS BEFORE MOVING INTO THE CANADIAN MARITIMES.
FARTHER SOUTH AND WEST, A LINE OF WEAK CONVECTION HAS DEVELOPED
ALONG THE VERMONT/NEW HAMPSHIRE BORDER. WITH TEMPERATURES AHEAD OF
THIS LINE CURRENTLY IN THE MID/UPPER 80S F (AT LEAST IN NEW
HAMPSHIRE), THERE IS AT LEAST SOME POTENTIAL FOR A STRONG/DAMAGING
WIND GUST TO OCCUR. DEEP-LAYER SHEAR HAS ALSO INCREASED IN THIS AREA
AS THE SHORTWAVE TROUGH HAS APPROACHED LATE THIS AFTERNOON. THAT
BEING SAID, DIURNAL COOLING WILL ALSO INCREASE WITH TIME. IT IS
UNCLEAR HOW STRONG THIS ACTIVITY WILL BE AS IT APPROACHES WESTERN
MAINE LATER THIS EVENING.
..WENDT.. 07/17/2025
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT
ATTN...WFO...CAR...GYX...BTV...ALY...
LAT...LON 43147303 44687274 46486986 47126818 47136772 46306776
45506921 44756976 43107215 43147303
MOST PROBABLE PEAK TORNADO INTENSITY...85-115 MPH
MOST PROBABLE PEAK WIND GUST...55-70 MPH
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