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Severe Thunderstorm Watch 689
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WW0689 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
High Moderate
Severe Hail 2"+ Hail
Moderate 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.
   SEL9
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 689
   NWS STORM PREDICTION CENTER NORMAN OK
   545 PM CDT SUN AUG 9 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          EASTERN IOWA
          NORTHWEST INTO CENTRAL ILLINOIS
          FAR SOUTHERN WISCONSIN
   
   EFFECTIVE THIS SUNDAY AFTERNOON AND MONDAY MORNING FROM 545 PM
   UNTIL 100 AM CDT.
   
   HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
   MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES SOUTHWEST
   OF CEDAR RAPIDS IOWA TO 15 MILES SOUTHEAST OF ROCKFORD ILLINOIS. 
   FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU9).
   
   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.
   
   OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES
   SEVERE THUNDERSTORM WATCH NUMBER 682. WATCH NUMBER 682 WILL NOT
   BE IN EFFECT AFTER 545 PM CDT. CONTINUE...WW 684...WW 685...WW
   686...WW 687...WW 688...
   
   DISCUSSION...STRONG TO SEVERE THUNDERSTORMS WILL REMAIN ACTIVE
   MOVING GENERALLY ENEWD ACROSS WW INTO THE EARLY MORNING HOURS AS
   SSWLY LLJ STRENGTHENS INTO ERN IA THIS EVENING.  AIR MASS REMAINS
   VERY MOIST AND UNSTABLE WITH SUFFICIENT DEEP LAYER SHEAR FOR
   ORGANIZATION INTO LINES/CLUSTERS.  MOST LIKELY SEVERE THREAT SHOULD
   BE FROM DAMAGING WINDS WITH BOW ECHOES PERSISTING ALONG AND JUST
   NORTH OF STALLED SURFACE BOUNDARIES.  VERY HEAVY RAINFALL AND
   ISOLATED LARGE HAIL WILL BE ADDITIONAL HAZARDS.
   
   AVIATION...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 26035.
   
   
   ...EVANS
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