MESO: Mesoscale Discussion 1172

ACUS11 KWNS 221925
SWOMCD
SPC MCD 221925
WYZ000-222130-

MESOSCALE DISCUSSION 1172
NWS STORM PREDICTION CENTER NORMAN OK
0225 PM CDT SAT JUN 22 2013

AREAS AFFECTED...CNTRL THROUGH ERN WY

CONCERNING...TORNADO WATCH 343...

VALID 221925Z - 222130Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 343 CONTINUES.

SUMMARY...THE THREAT FOR LARGE HAIL...DAMAGING WIND AND ISOLATED
TORNADOES PERSISTS ACROSS WW 343 WITH THE PRIMARY THREAT NEXT COUPLE
HOURS EXPECTED FROM CNTRL THROUGH ERN WY.

DISCUSSION...NUMEROUS THUNDERSTORMS CONTINUE DEVELOPING OVER THE
MOUNTAINS FROM WCNTRL THROUGH SERN WY INCLUDING THE LARAMIE RANGE. A
CORRIDOR OF RELATIVELY HIGHER INSTABILITY EXISTS FROM ECNTRL THROUGH
SERN WY WHERE STRONG DIABATIC WARMING AND MOIST LOW-LEVEL UPSLOPE
FLOW EXISTS SUPPORTING MLCAPE FROM 1000-1500 J/KG. STORMS WILL
LIKELY PERSIST AS DISCRETE SUPERCELLS AND OCCASIONAL BOWING SEGMENTS
NEXT COUPLE HOURS WITHIN A KINEMATIC ENVIRONMENT CHARACTERIZED BY
VEERING LOW LEVEL WINDS AND 35-45 KT EFFECTIVE SHEAR. CHARACTER OF
CLOUDS IN NERN WY SUGGESTS THE BOUNDARY LAYER IS STILL CAPPED...BUT
FURTHER DIABATIC WARMING MAY PROMOTE DEVELOPMENT OF SUSTAINED
THUNDERSTORMS BY 21Z.

..DIAL.. 06/22/2013

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...UNR...CYS...RIW...

LAT...LON 41430590 41900769 43100888 43660854 43380705 43450637
43750567 44230476 43950408 42860409 41210436 41430590

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