Tornado Watch 333

Issued

Jun 1, 2012, 1:50 PM EDT (17:50 UTC)

Expired

Jun 1, 2012, 8:21 PM EDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The Sterling radar (KLWX), 63 km from the middle of the area, began a volume at 17:52 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.

Two or more tornadoes

50%

One or more EF2 to EF5 tornadoes

30%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

40%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 1003Jun 1, 12:29 PM EDT
• Mesoscale Discussion 1004Jun 1, 1:03 PM EDT
• Mesoscale Discussion 1008Jun 1, 3:49 PM EDT
• Mesoscale Discussion 1010Jun 1, 4:25 PM EDT
• Mesoscale Discussion 1011Jun 1, 4:31 PM EDT
• Mesoscale Discussion 1014Jun 1, 6:54 PM EDT
• Mesoscale Discussion 1016Jun 1, 7:42 PM EDT

338 
WWUS20 KWNS 011752
SEL3
SPC WW 011752
DCZ000-MDZ000-NCZ000-PAZ000-VAZ000-CWZ000-020100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 333
NWS STORM PREDICTION CENTER NORMAN OK
150 PM EDT FRI JUN 1 2012

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

       DISTRICT OF COLUMBIA
       EASTERN MARYLAND
       NORTHEAST NORTH CAROLINA
       SOUTH-CENTRAL PENNSYLVANIA
       NORTHERN AND EASTERN VIRGINIA
       COASTAL WATERS

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 150 PM UNTIL 900
PM EDT.

TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE
MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH NORTHWEST OF
WILMINGTON DELAWARE TO 35 MILES SOUTH SOUTHWEST OF SOUTH HILL
VIRGINIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.

OTHER WATCH INFORMATION...CONTINUE...WW 332...

DISCUSSION...THUNDERSTORMS WILL CONTINUE TO INCREASE THROUGH THE
AFTERNOON IN A VERY MOIST AND INCREASINGLY UNSTABLE AIRMASS FROM NC
NWD ACROSS VA...THE DC AREA...MD EASTERN SHORE...AND INTO SRN PA. AT
FIRST...MORE ISOLATED STORMS EXHIBITING WEAK ROTATION WILL POSE A
THREAT FOR ISOLATED SEVERE WEATHER IN THE FORM OF HAIL AND LOCALLY
STRONG WINDS FROM NC INTO SERN VA. WITH TIME...A MORE SUBSTANTIAL
WIND AND ISOLATED TORNADO THREAT WILL EVOLVE AS A STRONG UPPER
TROUGH AND ASSOCIATED COLD FRONT SPREAD EAST. FOCUSED TORNADO THREAT
MAY ALSO EVOLVE ALONG THE WARM FRONT LIFTING ACROSS THE DC/BWI AREA
AND INTO PARTS OF SCNTRL PA LATER THIS AFTERNOON AND EARLY EVENING.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 21030.


...CARBIN

Tornado Watches in Virginia, 2012Tornado Watches in Maryland, 2012Tornado Watches in North Carolina, 2012Every tornado watch in 2012

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.