158
ACUS11 KWNS 122320
SWOMCD
SPC MCD 122319
VAZ000-MDZ000-DCZ000-130045-
MESOSCALE DISCUSSION 1112
NWS STORM PREDICTION CENTER NORMAN OK
0619 PM CDT FRI JUN 12 2026
AREAS AFFECTED...PORTIONS OF THE MID-ATLANTIC...INCLUDING WASHINGTON
D.C.
CONCERNING...SEVERE THUNDERSTORM WATCH 321...
VALID 122319Z - 130045Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 321
CONTINUES.
SUMMARY...A GRADUAL DECREASE IN CONVECTIVE INTENSITY AND COVERAGE IS
EXPECTED THROUGH THE NEXT 1-2 HOURS. SOME POTENTIAL FOR OCCASIONAL
DAMAGING WIND GUSTS WILL CONTINUE IN THE MEANTIME.
DISCUSSION...REGIONAL RADAR IMAGERY CONTINUES TO DEPICTS SCATTERED
THUNDERSTORMS ACROSS SEVERE THUNDERSTORM WATCH 321, WITH A DOWNBURST
RECENTLY PRODUCING A MEASURED 58 KT (67 MPH) WIND GUST AT DULLES
AIRPORT. DOWNSTREAM SURFACE OBSERVATIONS ACROSS SOUTHEASTERN
VIRGINIA INDICATE SURFACE TEMPERATURES ARE BEGINNING TO COOL, WITH A
DISSIPATION OF BOUNDARY LAYER CUMULUS ALSO NOTED ON VISIBLE
SATELLITE. AS NOCTURNAL COOLING/STABILIZATION CONTINUES, A GRADUAL
DECREASE IN CONVECTIVE COVERAGE AND INTENSITY IS EXPECTED OVER THE
NEXT 1-2 HOURS. SOME POTENTIAL FOR OCCASIONAL DAMAGING WIND GUSTS
WILL PERSIST IN THE NEAR-TERM, HOWEVER, WITH THE GREATEST POTENTIAL
LIKELY TO ACCOMPANY ANY STRONGER DOWNBURSTS. A LOCAL WATCH EXTENSION
MAY BE NEEDED, PARTICULARLY IN SOUTHEASTERN VIRGINIA, SHOULD A
STRONGER STORM OR TWO PERSIST AFTER 01Z, BUT A NEW SEVERE
THUNDERSTORM WATCH IS NOT ANTICIPATED.
..CHALMERS.. 06/12/2026
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT
ATTN...WFO...AKQ...LWX...RNK...
LAT...LON 39097751 39107734 39057713 38977694 38847685 38057647
37827637 37657636 37507649 37437665 37247718 37077803
37017864 37077920 37147947 37467943 37777916 38337849
38507824 38987766 39097751
MOST PROBABLE PEAK WIND GUST...55-70 MPH
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