Skip Navigation Links weather.gov 
NOAA logo-Select to go to the NOAA homepage NOAA's National Weather Service   Select to go to the NWS homepage
Storm Prediction Center
navigation bar left  
  navigation bar end cap


 
USA.gov is the U.S. Government's official Web portal to all Federal, state and local government Web resources and services.

Tornado Watch 240
< Previous WW         Next WW >
  | | | | | |  
WW0240 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Moderate Low
Severe Wind 65 kt+ Wind
Moderate Moderate
Severe Hail 2"+ Hail
Moderate Moderate

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL0
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 240
   NWS STORM PREDICTION CENTER NORMAN OK
   615 PM EDT WED APR 27 2011
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          DISTRICT OF COLUMBIA
          MARYLAND
          NORTHERN NORTH CAROLINA
          CENTRAL AND EASTERN VIRGINIA
          EASTERN WEST VIRGINIA
          COASTAL WATERS
   
   EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 615 PM
   UNTIL 200 AM 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 70 STATUTE
   MILES EAST AND WEST OF A LINE FROM 15 MILES NORTHEAST OF
   MARTINSBURG WEST VIRGINIA TO 30 MILES WEST SOUTHWEST OF RALEIGH
   NORTH CAROLINA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).
   
   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...THIS TORNADO WATCH REPLACES TORNADO
   WATCH NUMBER 233. WATCH NUMBER 233 WILL NOT BE IN EFFECT AFTER
   615 PM EDT. CONTINUE...WW 232...WW 234...WW 235...WW 236...WW
   237...WW 238...WW 239...
   
   DISCUSSION...TSTMS HAVE RAPIDLY INTENSIFIED THIS EVENING WITHIN A
   MOIST AND MODERATELY UNSTABLE ENVIRONMENT WITH MLCAPE VALUES OF
   1000-2000 J/KG.  DEEP-LAYER VERTICAL SHEAR IS ALREADY SUPPORTIVE OF
   SUPERCELLS...AND LOW-LEVEL SHEAR IS FORECAST TO STRENGTHEN THROUGH
   THE REMAINDER OF THE EVENING WITH EFFECTIVE SRH VALUES APPROACHING
   250-300 M2/S2.  AS SUCH...THE POTENTIAL FOR TORNADOES WILL EXIST IN
   ADDITION TO DAMAGING WINDS AND HAIL.
   
   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 24035.
   
   
   ...MEAD
Top of Page/Status Messages for this watch/All Current Watches/Forecast Products/Home
Weather Topics:
Watches, Mesoscale Discussions, Outlooks, Fire Weather, All Products, Contact Us

NOAA / National Weather Service
National Centers for Environmental Prediction
Storm Prediction Center
120 David L. Boren Blvd.
Norman, OK 73072 U.S.A.
spc.feedback@noaa.gov
Page last modified: April 28, 2011
Disclaimer
Information Quality
Help
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities