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 449
< Previous WW          Next WW >
  | | | | | |  
WW0449 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood High Moderate
Severe Wind 65 kt+ Wind
Moderate Moderate
Severe Hail 2"+ Hail
High 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.
   SEL9
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 449
   NWS STORM PREDICTION CENTER NORMAN OK
   700 PM CDT WED JUN 17 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          NORTH CENTRAL AND NORTHEAST IOWA
          SOUTH CENTRAL AND SOUTHEAST MINNESOTA
   
   EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 700 PM
   UNTIL 100 AM CDT.
   
   TORNADOES...HAIL TO 2.5 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 NORTH AND SOUTH OF A LINE FROM 15 MILES WEST SOUTHWEST OF
   FAIRMONT MINNESOTA TO 25 MILES SOUTH OF LA CROSSE WISCONSIN.  FOR
   A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU9).
   
   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 439...WW 440...WW
   441...WW 442...WW 443...WW 445...WW 444...WW 446...WW 447...WW
   448...
   
   DISCUSSION...A VERY UNSTABLE ENVIRONMENT IS PRESENT ACROSS S/SE MN
   INTO NRN IA...ALONG AND S OF A SURFACE WARM FRONT AND WEAK SURFACE
   WAVE IN SRN MN.  BOUNDARY LAYER DEWPOINTS IN THE 70S AND
   TEMPERATURES IN THE 80S ARE CONTRIBUTING TO MLCAPE VALUES OF
   3000-4000 J/KG...AND EFFECTIVE BULK SHEAR OVER THIS AREA IS AOA 50
   KTS.  THE ENVIRONMENT STRONGLY FAVORS DISCRETE SUPERCELL
   DEVELOPMENT...WHILE THE RICH LOW-LEVEL MOISTURE AND 0-1 KM SRH AOA
   200 M2/S2 WILL FAVOR TORNADIC SUPERCELLS.  GIVEN THESE ENVIRONMENTAL
   CONDITIONS...AN ISOLATED STRONG TORNADO MAY OCCUR.  OTHERWISE...VERY
   LARGE HAIL AND ISOLATED DAMAGING WINDS WILL BE POSSIBLE.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   550. MEAN STORM MOTION VECTOR 29025.
   
   
   ...THOMPSON
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: June 18, 2009		 Disclaimer
Information Quality
Credits
Glossary 		Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities