SEL4
SPC WW 180036
COZ000-180400-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 784
NWS STORM PREDICTION CENTER NORMAN OK
635 PM MDT WED AUG 17 2011
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
SOUTHEAST COLORADO
EFFECTIVE THIS WEDNESDAY EVENING FROM 635 PM UNTIL 1000 PM MDT.
HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 75
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES SOUTHWEST
OF LA JUNTA COLORADO TO 40 MILES EAST SOUTHEAST OF LAMAR
COLORADO. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).
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 783...
DISCUSSION...STORMS ARE BECOMING BETTER ORGANIZED INTO AN ARCING
LINE APPROACHING THE AR RIVER VALLEY AS CONVERGENCE INCREASES ALONG
INTERSECTING OUTFLOW BOUNDARIES. MOIST UPSLOPE LOW LEVEL FLOW AND A
DEEP WELL-MIXED BOUNDARY LAYER WILL ENHANCE POTENTIAL FOR DAMAGING
WIND GUSTS AND OCCASIONAL HAIL AS THE LINE MOVES SEWD OVER THE NEXT
SEVERAL HOURS.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 29020.
...WEISS
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