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.

Severe Thunderstorm Watch 470
< Previous WW         Next WW >
  | | | | | |  
WW0470 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Very Low Very Low
Severe Wind 65 kt+ Wind
Low Very Low
Severe Hail 2"+ Hail
Low Low

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
   SEVERE THUNDERSTORM WATCH NUMBER 470
   NWS STORM PREDICTION CENTER NORMAN OK
   105 AM CDT THU AUG 21 2014

   THE NWS STORM PREDICTION CENTER HAS ISSUED A

   * SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
     SOUTHERN MINNESOTA

   * EFFECTIVE THIS THURSDAY MORNING FROM 105 AM UNTIL 700 AM CDT.

   * PRIMARY THREATS INCLUDE...
     ISOLATED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE

   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 60 MILES SOUTHWEST
   OF ALEXANDRIA MINNESOTA TO 35 MILES NORTH NORTHEAST OF MANKATO
   MINNESOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).

   PRECAUTIONARY/PREPAREDNESS ACTIONS...

   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.

   &&

   DISCUSSION...THUNDERSTORM DEVELOPMENT WAS UNDERWAY ACROSS WRN MN
   LATE TONIGHT AHEAD OF A SHORTWAVE TROUGH AND ASSOCIATED SURFACE LOW
   AND WARM FRONT SITUATED ACROSS THE NRN PLAINS. LIFT OCCURRING ACROSS
   THE WARM FRONT SHOULD CONTINUE TO AID UPDRAFT DEVELOPMENT ON THE
   EDGE OF STRONGER CAPPING INVERSION. MODEST INSTABILITY AND
   INCREASING SHEAR SHOULD CONTRIBUTE TO HAIL PRODUCTION FROM SOME OF
   THE STRONGER CELLS. DOWNWARD MOMENTUM TRANSFER MAY ALSO RESULT IN
   GUSTY/STRONGER WINDS GIVEN RELATIVELY WEAK BOUNDARY LAYER
   INHIBITION. EXPECT THIS CONVECTION TO SPREAD EAST ACROSS PARTS OF
   SRN MN OVER THE NEXT SEVERAL HOURS SUSTAINED BY THE SHORTWAVE TROUGH
   AND ENHANCED MASS TRANSPORT ON THE NOSE OF 40KT LOW LEVEL JET.

   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 50
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM
   MOTION VECTOR 27025.


   ...CARBIN
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: August 21, 2014
Disclaimer
Information Quality
Help
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities