Tornado Watch 402

Issued

May 31, 2008, 10:20 AM EDT (14:20 UTC)

Expired

May 31, 2008, 5:04 PM EDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Sterling radar (KLWX), 149 km from the middle of the area, began a volume at 14:22 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

70%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

95%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

95%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 1111May 31, 7:27 AM EDT
• Mesoscale Discussion 1113May 31, 8:54 AM EDT
• Mesoscale Discussion 1119May 31, 4:28 PM EDT

000
WWUS20 KWNS 311423
SEL2  
SPC WW 311423
DCZ000-DEZ000-KYZ000-MDZ000-NJZ000-OHZ000-PAZ000-VAZ000-WVZ000-CWZ00
0-312100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 402
NWS STORM PREDICTION CENTER NORMAN OK
1020 AM EDT SAT MAY 31 2008

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

       DISTRICT OF COLUMBIA
       DELAWARE
       FAR NORTHEAST KENTUCKY
       MARYLAND
       NEW JERSEY
       SOUTHEAST OHIO
       SOUTHERN AND EASTERN PENNSYLVANIA
       NORTHERN VIRGINIA
       WEST VIRGINIA
       COASTAL WATERS

EFFECTIVE THIS SATURDAY MORNING AND AFTERNOON FROM 1020 AM UNTIL
500 PM EDT.

TORNADOES...HAIL TO 2 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 55 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 25 MILES SOUTHWEST OF ATHENS
OHIO TO 30 MILES SOUTHEAST OF LAKEHURST NEW JERSEY.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU2).

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 399...WW 400...WW 401...

DISCUSSION...ACTIVE AFTERNOON ON TAP FOR THIS REGION AS STRONG FLOW
ALOFT OVERSPREADS A WARM/HUMID BOUNDARY LAYER SOUTH OF EFFECTIVE
OUTFLOW/CLOUDS NOW PERSISTING OVER MUCH OF PA.  SEVERE THREAT WILL
EVOLVE IN MULTIPLE MODES...INCLUDING SUPERCELLS AND SMALL BOW
ECHOES.  THEREFORE...LARGE HAIL...DAMAGING WINDS AND ISOLATED
TORNADOES WILL ALL BE POSSIBLE WITH THE STRONGER CORES TODAY.

AVIATION...TORNADOES AND 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 27035.


...EVANS

Tornado Watches in West Virginia, 2008Tornado Watches in Virginia, 2008Tornado Watches in Maryland, 2008Every tornado watch in 2008

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.