

000 

WWUS20 KWNS 250038

SEL8

SPC WW 250038

IAZ000-NEZ000-250800-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 688

NWS STORM PREDICTION CENTER NORMAN OK

735 PM CDT MON SEP 24 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHWEST IOWA

       SOUTHEAST NEBRASKA



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 735 PM UNTIL

300 AM CDT.



HAIL TO 1.5 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 35

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES WEST

NORTHWEST OF BEATRICE NEBRASKA TO 35 MILES NORTH NORTHEAST OF

SHENANDOAH IOWA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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...CONTINUE...WW 687...



DISCUSSION...SMALL AREA OF STRONG STORMS/POTENTIAL SUPERCELLS

EXPECTED TO PERSIST W OF BIE...NEAR INTERSECTION OF SE-MOVING COLD

FRONT AND N/S CONFLUENCE AXIS ACROSS KS.  AS SSWLY LLJ SLIGHTLY

STRENGTHENS THIS EVENING...ACTIVITY MAY CONTINUE TO FORM AND SPREAD

ENE ALONG THE FRONT TOWARD THE LNK/OMA AREA.  GIVEN DEGREE OF

LINGERING INSTABILITY AND MODERATE WIND FIELD...POTENTIAL WILL EXIST

FOR LOCALLY DAMAGING WIND AND HAIL.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 25030.





...CORFIDI



000 

WWUS20 KWNS 250038 CCA

SEL8

SPC WW 250038 CCA

IAZ000-NEZ000-250500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 688...CORRECTED

NWS STORM PREDICTION CENTER NORMAN OK

735 PM CDT MON SEP 24 2007



CORRECTED FOR ENDING TIME



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHWEST IOWA

       SOUTHEAST NEBRASKA



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 735 PM UNTIL

MIDNIGHT CDT.



HAIL TO 1.5 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 35

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES WEST

NORTHWEST OF BEATRICE NEBRASKA TO 35 MILES NORTH NORTHEAST OF

SHENANDOAH IOWA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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...CONTINUE...WW 687...



DISCUSSION...SMALL AREA OF STRONG STORMS/POTENTIAL SUPERCELLS

EXPECTED TO PERSIST W OF BIE...NEAR INTERSECTION OF SE-MOVING COLD

FRONT AND N/S CONFLUENCE AXIS ACROSS KS.  AS SSWLY LLJ SLIGHTLY

STRENGTHENS THIS EVENING...ACTIVITY MAY CONTINUE TO FORM AND SPREAD

ENE ALONG THE FRONT TOWARD THE LNK/OMA AREA.  GIVEN DEGREE OF

LINGERING INSTABILITY AND MODERATE WIND FIELD...POTENTIAL WILL EXIST

FOR LOCALLY DAMAGING WIND AND HAIL.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 25030.





...CORFIDI

