

793 

WWUS20 KWNS 172051

SEL8

SPC WW 172051

COZ000-180300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 598

NWS STORM PREDICTION CENTER NORMAN OK

250 PM MDT FRI JUL 17 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHEASTERN COLORADO



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 250 PM UNTIL 900

PM MDT.



TORNADOES...HAIL TO 3 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 EAST AND WEST OF A LINE FROM 45 MILES NORTH NORTHEAST OF LA

JUNTA COLORADO TO 35 MILES WEST SOUTHWEST OF SPRINGFIELD

COLORADO.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 592...WW 593...WW

594...WW 595...WW 596...WW 597...



DISCUSSION...STORMS IN NERN CO AND WRN KS ARE EXPECTED TO SHIFT

SOUTH AND SOUTHWESTWARD INTO SERN CO DURING THE LATE

AFTERNOON/EVENING HOURS. DEEP LAYER SHEAR AND INSTABILITY IS

FAVORABLE FOR SUPERCELLS WITH VERY LARGE HAIL. ALSO...THE PRESENCE

OF THE MOIST BOUNDARY LAYER AND  OUTFLOW BOUNDARY...STRETCHING N-S

THROUGH SERN CO...WILL BE FAVORABLE FOR AN ISOLATED TORNADO OR TWO.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

550. MEAN STORM MOTION VECTOR 36025.





...IMY

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