SWOMCD
SPC MCD 301949
NEZ000-COZ000-WYZ000-302145-
MESOSCALE DISCUSSION 1452
NWS STORM PREDICTION CENTER NORMAN OK
0249 PM CDT THU JUN 30 2011
AREAS AFFECTED...WRN/NRN CO...SERN/SCNTRL WY...WRN NEB PNHDL
CONCERNING...SEVERE THUNDERSTORM WATCH 576...577...
VALID 301949Z - 302145Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
576...577...CONTINUES.
HIGH-BASED STORMS ALONG THE HIGH PLAINS HAVE BEEN STRUGGLING
SOMEWHAT AS THEY ENCOUNTER SLIGHTLY STRONGER CINH.
HOWEVER...LEADING EDGE OF ENHANCED LARGE-SCALE ASCENT WAS CROSSING
THE CONTINENTAL DIVIDE AND WILL CONTRIBUTE TO AN UPTICK IN STORMS
FROM SERN WY...WRN NEB PNHDL SWD INTO NERN CO AS THE CAP WEAKENS
THROUGH 22Z.
WEST OF THE DIVIDE...DEEP WSW TROPOSPHERIC WIND PROFILES INCREASING
TO 50+ KTS AT 500 MB WILL CONTINUE TO FOSTER BOWING LINE SEGMENTS AS
HIGH-BASED STORMS MATURE OVER CNTRL CO. MEANWHILE...TCU/CBS
DEVELOPING EAST OF THE DIVIDE WILL BEGIN TO ENCOUNTER A STRONGLY
HEATED AND SLIGHTLY MORE MOIST BOUNDARY LAYER ARCING UPSLOPE FROM
NERN CO/SWRN NEB INTO SERN WY. HERE...A MIX OF SUPERCELLS AND
MULTICELLS STORMS MAY BECOME QUITE ROBUST OWING TO ROUGHLY 45 KTS OF
0-8KM SHEAR AND VERY STEEP H7-H5 LAPSE RATES. WHILE DRY SUB-CLOUD
LAYER WILL LIMIT TORNADO PRODUCTION...DCAPE OF 1300+ J/KG AND FAST
FLOW ALOFT WILL LIKELY YIELD DAMAGING/SVR WINDS ALONG WITH HAIL.
..RACY.. 06/30/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...PUB...BOU...CYS...RIW...GJT...
LAT...LON 37100858 40620868 42790486 42450325 39880316 38950577
38220757 37100858
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