samedi 23 mars 2013

http://www.spc.noaa.gov/products/watch/ww0059.html

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WW0059 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.
   SEL9
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 59
   NWS STORM PREDICTION CENTER NORMAN OK
   520 PM CDT SAT MAR 23 2013
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          PARTS OF SOUTHERN AND CENTRAL MISSISSIPPI
   
   EFFECTIVE THIS SATURDAY AFTERNOON AND SUNDAY MORNING FROM 520 PM
   UNTIL 100 AM CDT.
   
   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 60 STATUTE
   MILES NORTH AND SOUTH OF A LINE FROM 55 MILES NORTHWEST OF MC
   COMB MISSISSIPPI TO 25 MILES EAST SOUTHEAST OF MERIDIAN
   MISSISSIPPI.  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 58...
   
   DISCUSSION...THE ENVIRONMENT IS BECOMING INCREASING CONDUCIVE TO
   SUPERCELLS ACROSS THE WATCH AREA THIS EVENING.  AS LOW-LEVEL WIND
   FIELDS STRENGTHEN IN RESPONSE TO A DEVELOPING SURFACE LOW ACROSS THE
   LOWER MISSISSIPPI VALLEY...STORMS MAY BECOME CAPABLE OF PRODUCING A
   COUPLE OF TORNADOES...IN ADDITION TO LARGE HAIL AND LOCALLY DAMAGING
   WIND GUSTS.
   
   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
   450. MEAN STORM MOTION VECTOR 25040.

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