WW 210 SEVERE TSTM CO KS OK TX 302040Z – 010400Z
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 210
NWS STORM PREDICTION CENTER NORMAN OK
340 PM CDT MON APR 30 2012
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
FAR SOUTHEAST COLORADO
SOUTHWEST KANSAS
OKLAHOMA PANHANDLE
WESTERN TEXAS
EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 340 PM UNTIL
1100 PM CDT.
HAIL TO 2.5 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 80
STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH
NORTHEAST OF ELKHART KANSAS TO 50 MILES SOUTH SOUTHEAST OF
LUBBOCK TEXAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).
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 208...WW 209...
DISCUSSION...TSTMS ARE IN THE PROCESS OF DEVELOPING THIS AFTERNOON
ALONG DRYLINE WHICH HAS MIXED TO JUST E OF THE TX-NM BORDER.
ADDITIONAL STORMS MAY DEVELOP ALONG AN OUTFLOW BOUNDARY S OF
LBB...AS WELL AS ALONG A SECONDARY BAROCLINIC ZONE OVER SWRN KS INTO
SERN CO. WARM SECTOR AIR MASS ACROSS THE WATCH AREA IS
CHARACTERIZED BY STEEP LAPSE RATES AND BOUNDARY LAYER DEWPOINTS OF
55-60 F WITH MLCAPE VALUES RANGING FROM 1000-1500 J/KG NORTH TO
2500-3500 J/KG SOUTH. WHEN COUPLED WITH A VERTICALLY VEERING WIND
PROFILE AND 40-45 KT OF EFFECTIVE BULK SHEAR...ENVIRONMENT IS QUITE
SUPPORTIVE OF SUPERCELLS CAPABLE OF MAINLY LARGE HAIL. WHILE A
TORNADO IS POSSIBLE...THE GENERALLY WEAK LOW-LEVEL SHEAR AND GROWING
T-TD SPREADS WILL PRECLUDE A MORE ROBUST THREAT.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 27020.
...MEAD
via SPC Forecast Products http://www.spc.noaa.gov/products/watch/ww0210.html
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