

824 

WWUS20 KWNS 271035

SEL9

SPC WW 271035

ILZ000-KSZ000-MOZ000-271800-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 959

NWS STORM PREDICTION CENTER NORMAN OK

430 AM CST SAT DEC 27 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WEST CENTRAL ILLINOIS

       SOUTHEAST KANSAS

       MUCH OF MISSOURI



EFFECTIVE THIS SATURDAY MORNING FROM 430 AM UNTIL NOON CST.



TORNADOES...HAIL TO 1.5 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 130 STATUTE

MILES EAST AND WEST OF A LINE FROM 70 MILES NORTH NORTHWEST OF

ALTON ILLINOIS TO 15 MILES SOUTHEAST OF MONETT MISSOURI.  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 955...WW 956...WW

957...WW 958...



DISCUSSION...TSTMS ALONG COLD FRONT IN ERN KS EXPECTED TO REMAIN

STRONG AND POSSIBLY INCREASE AS FRONT CONTINUES ESE INTO MO BENEATH

STRENGTHENING UPR DIFFLUENCE/ASCENT ASSOCIATED WITH PROGRESSIVE SRN

HI PLNS UPR VORT.  ACTIVITY MAY ALSO BE ENHANCED BY LOW LVL

CONVERGENCE DOWNSTREAM FROM CNTRL OK SFC WAVE.  OTHER STORMS MAY

SLOWLY INCREASE FROM NRN AR NNE INTO CNTRL MO...ALONG ERN SIDE OF

SSWLY LLJ.  WITH SHEAR FAVORABLE FOR SUPERCELL STRUCTURES THROUGHOUT

WW...COMBINATION OF CONTINUED MOIST INFLOW...MODEST SFC HEATING

...AND INCREASING UVV SUGGESTS POTENTIAL FOR SCTD SUSTAINED STORMS

WITH A THREAT FOR TORNADOES...IN ADDITION TO HIGH WIND AND POSSIBLY

SVR HAIL.



AVIATION...TORNADOES AND 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

450. MEAN STORM MOTION VECTOR 23050.





...CORFIDI



824 

WWUS20 KWNS 271035

SEL9

SPC WW 271035

ILZ000-KSZ000-MOZ000-271800-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 959

NWS STORM PREDICTION CENTER NORMAN OK

430 AM CST SAT DEC 27 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WEST CENTRAL ILLINOIS

       SOUTHEAST KANSAS

       MUCH OF MISSOURI



EFFECTIVE THIS SATURDAY MORNING FROM 430 AM UNTIL NOON CST.



TORNADOES...HAIL TO 1.5 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 130 STATUTE

MILES EAST AND WEST OF A LINE FROM 70 MILES NORTH NORTHWEST OF

ALTON ILLINOIS TO 15 MILES SOUTHEAST OF MONETT MISSOURI.  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 955...WW 956...WW

957...WW 958...



DISCUSSION...TSTMS ALONG COLD FRONT IN ERN KS EXPECTED TO REMAIN

STRONG AND POSSIBLY INCREASE AS FRONT CONTINUES ESE INTO MO BENEATH

STRENGTHENING UPR DIFFLUENCE/ASCENT ASSOCIATED WITH PROGRESSIVE SRN

HI PLNS UPR VORT.  ACTIVITY MAY ALSO BE ENHANCED BY LOW LVL

CONVERGENCE DOWNSTREAM FROM CNTRL OK SFC WAVE.  OTHER STORMS MAY

SLOWLY INCREASE FROM NRN AR NNE INTO CNTRL MO...ALONG ERN SIDE OF

SSWLY LLJ.  WITH SHEAR FAVORABLE FOR SUPERCELL STRUCTURES THROUGHOUT

WW...COMBINATION OF CONTINUED MOIST INFLOW...MODEST SFC HEATING

...AND INCREASING UVV SUGGESTS POTENTIAL FOR SCTD SUSTAINED STORMS

WITH A THREAT FOR TORNADOES...IN ADDITION TO HIGH WIND AND POSSIBLY

SVR HAIL.



AVIATION...TORNADOES AND 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

450. MEAN STORM MOTION VECTOR 23050.





...CORFIDI

