SPC Severe Thunderstorm Watch 541

WW 541 SEVERE TSTM CO KS NE 310030Z – 310600Z


URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 541
NWS STORM PREDICTION CENTER NORMAN OK
630 PM MDT MON JUL 30 2012

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

       EASTERN COLORADO
       NORTHWEST KANSAS
       FAR SOUTHWEST NEBRASKA

EFFECTIVE THIS MONDAY NIGHT FROM 630 PM UNTIL MIDNIGHT MDT.

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 55
STATUTE MILES EAST AND WEST OF A LINE FROM 65 MILES NORTH OF
GOODLAND KANSAS TO 40 MILES SOUTH OF GOODLAND KANSAS.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU1).

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 540...

DISCUSSION...MCS WITH A HISTORY OF DAMAGING WINDS CONTINUES TO
ORGANIZE THIS EVENING OVER THE HIGH PLAINS OF NERN CO WITHIN A STEEP
LAPSE RATE ENVIRONMENT WITH MLCAPE OF 1000-2000 J/KG.  GIVEN THE 40
KT MIDLEVEL FLOW OBSERVED BY 00Z DENVER SOUNDING AND ELY LOW-LEVEL
WINDS...KINEMATIC ENVIRONMENT WILL BE SUPPORTIVE OF FORWARD
PROPAGATION OF MCS WITH THE THREAT FOR DAMAGING WINDS SPREADING EWD
ACROSS THE WATCH AREA.

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 27030.


...MEAD

via SPC Forecast Products http://www.spc.noaa.gov/products/watch/ww0541.html