Severe Thunderstorm Watch 902

Issued

Aug 27, 2003, 3:30 PM EDT (19:30 UTC)

Expired

Aug 27, 2003, 10:00 PM EDT

In force

7 hr

Issued by

the Storm Prediction Center

The Sterling radar (KLWX), 61 km from the middle of the area, began a volume at 19:31 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

• Mesoscale Discussion 2285Aug 27, 11:48 AM EDT
• Mesoscale Discussion 2287Aug 27, 2:10 PM EDT
• Mesoscale Discussion 2288Aug 27, 3:09 PM EDT
• Mesoscale Discussion 2290Aug 27, 5:03 PM EDT
• Mesoscale Discussion 2292Aug 27, 6:56 PM EDT
• Mesoscale Discussion 2295Aug 27, 9:19 PM EDT

000 
WWUS20 KWNS 271933
SEL2  
SPC WW 271930
DCZ000-MDZ000-PAZ000-VAZ000-WVZ000-280200-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 902 
NWS STORM PREDICTION CENTER NORMAN OK 
330 PM EDT WED AUG 27 2003

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 

       DISTRICT OF COLUMBIA
       MARYLAND
       SOUTH CENTRAL PENNSYLVANIA
       NORTHERN AND CENTRAL VIRGINIA
       EASTERN PANHANDLE OF WEST VIRGINIA

EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 330 PM UNTIL
1000 PM EDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 70 STATUTE MILES
EITHER SIDE OF A LINE FROM 75 MILES NORTH NORTHWEST OF STAUNTON
VIRGINIA TO 40 MILES EAST SOUTHEAST OF WASHINGTON DC.

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.


OTHER WATCH INFORMATION...CONTINUE...WW 900...WW 901...


DISCUSSION...SEVERE THUNDERSTORMS CONTINUE TO DEVELOP EWD INTO SWRN
PA/NRN AND WRN WV IN ADVANCE OF A SHORT WAVE TROUGH MOVING ESEWD
ACROSS THE OH VALLEY.  AIR MASS HAS RECOVERED IN THE WAKE OF EARLIER
CONVECTION WITH DESTABILIZATION CONTINUING INTO SRN PA/MD/NRN VA
WHERE MLCAPE REACHES 1500-2500 J/KG.  VAD PROFILES SHOW 30-40 KT
WNWLY WINDS ABOVE 3 KM AGL PROVIDING SUFFICIENT VERTICAL SHEAR TO
AID STORM ORGANIZATION AND INTENSITY.  ACTIVITY IS EXPECTED TO
SPREAD ESEWD THROUGH THE EVENING HOURS WITH THREAT FOR DAMAGING
WINDS AND HAIL.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 28035.


...WEISS

401,0790 393,0760 373,0763 381,0794

Severe Thunderstorm Watches in Virginia, 2003Severe Thunderstorm Watches in Maryland, 2003Severe Thunderstorm Watches in West Virginia, 2003Every severe thunderstorm watch in 2003

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.