Severe Thunderstorms Possible Today in VA/NC/MD
Posted: Wed May 07, 2003 7:27 am
CLUSTERS OF STRONG TO POTENTIALLY SEVERE TSTMS WILL BE ONGOING AT
THE BEGINNING OF THE FORECAST FROM THE LOWER OH VALLEY SWWD INTO
THE LOWER MS VALLEY. THESE STORMS WILL CONTINUE TO SHIFT EWD
THROUGH THE MORNING HOURS ALONG 30-40KT LLJ AXIS AND AHEAD OF
AFOREMENTIONED SHORTWAVE TROUGH TRANSLATING THROUGH THE AREA.
ALTHOUGH WIDESPREAD CLOUDS WILL LIMIT ISOLATION/DESTABILIZATION...A
LARGE RESERVOIR OF MID 60S TO MID 70S DEWPOINTS CURRENTLY IN PLACE
ACROSS THE GULF COAST SHOULD ALLOW THE ATMOSPHERE TO BECOME
MODERATELY UNSTABLE BY LATE MORNING/EARLY AFTERNOON WITH MLCAPES
APPROACHING 1500-2500 J/KG. TSTMS ARE EXPECTED TO INTENSIFY/
REDEVELOP AT THIS TIME AHEAD OF SURFACE LOW OVER THE MIDDLE OH
VALLEY SWD INTO THE CNTRL GULF COAST REGION BEFORE SPREADING EWD
INTO THE MIDDLE ATLANTIC STATES/SERN U.S. BY LATE AFTERNOON INTO
THE EVENING HOURS.
45-55KTS OF 0-6KM AGL SHEAR WILL ONCE AGAIN PERSIST ACROSS THE WARM
SECTOR EFFECTIVELY SUPPORTING THE POTENTIAL FOR SEVERE TSTMS...
INCLUDING SUPERCELLS. LARGE HAIL AND DAMAGING WINDS WILL BE THE
PRIMARY THREATS...HOWEVER ISOLATED TORNADOES WILL ALSO BE POSSIBLE
WITH STORMS INTERACTING WITH ANY RESIDUAL BOUNDARIES. THIS WILL BE
ESPECIALLY THE CASE FROM NRN MS/AL EWD ACROSS NRN GA INTO THE
CAROLINAS WHERE AMBIENT 0-3KM SRH VALUES WILL RANGE FROM 200-400
M2/S2.
THE BEGINNING OF THE FORECAST FROM THE LOWER OH VALLEY SWWD INTO
THE LOWER MS VALLEY. THESE STORMS WILL CONTINUE TO SHIFT EWD
THROUGH THE MORNING HOURS ALONG 30-40KT LLJ AXIS AND AHEAD OF
AFOREMENTIONED SHORTWAVE TROUGH TRANSLATING THROUGH THE AREA.
ALTHOUGH WIDESPREAD CLOUDS WILL LIMIT ISOLATION/DESTABILIZATION...A
LARGE RESERVOIR OF MID 60S TO MID 70S DEWPOINTS CURRENTLY IN PLACE
ACROSS THE GULF COAST SHOULD ALLOW THE ATMOSPHERE TO BECOME
MODERATELY UNSTABLE BY LATE MORNING/EARLY AFTERNOON WITH MLCAPES
APPROACHING 1500-2500 J/KG. TSTMS ARE EXPECTED TO INTENSIFY/
REDEVELOP AT THIS TIME AHEAD OF SURFACE LOW OVER THE MIDDLE OH
VALLEY SWD INTO THE CNTRL GULF COAST REGION BEFORE SPREADING EWD
INTO THE MIDDLE ATLANTIC STATES/SERN U.S. BY LATE AFTERNOON INTO
THE EVENING HOURS.
45-55KTS OF 0-6KM AGL SHEAR WILL ONCE AGAIN PERSIST ACROSS THE WARM
SECTOR EFFECTIVELY SUPPORTING THE POTENTIAL FOR SEVERE TSTMS...
INCLUDING SUPERCELLS. LARGE HAIL AND DAMAGING WINDS WILL BE THE
PRIMARY THREATS...HOWEVER ISOLATED TORNADOES WILL ALSO BE POSSIBLE
WITH STORMS INTERACTING WITH ANY RESIDUAL BOUNDARIES. THIS WILL BE
ESPECIALLY THE CASE FROM NRN MS/AL EWD ACROSS NRN GA INTO THE
CAROLINAS WHERE AMBIENT 0-3KM SRH VALUES WILL RANGE FROM 200-400
M2/S2.