MESO: Mesoscale Discussion 2093

ACUS11 KWNS 020827
SWOMCD
SPC MCD 020827
IAZ000-MNZ000-021000-

MESOSCALE DISCUSSION 2093
NWS STORM PREDICTION CENTER NORMAN OK
0327 AM CDT FRI SEP 02 2011

AREAS AFFECTED...NRN IA THROUGH EXTREME S-CNTRL AND SERN MN

CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE

VALID 020827Z - 021000Z

STORMS DEVELOPING ACROSS NRN IA AND POSSIBLY EVENTUALLY INTO SRN MN
MAY REMAIN CAPABLE OF PRODUCING ISOLATED STRONG TO DAMAGING WIND
GUSTS AND SOME HAIL NEXT 2-3 HOURS. TRENDS ARE BEING MONITORED FOR A
POSSIBLE WW.

COLD FRONT EXTENDS FROM EXTREME WRN WI SWWD THROUGH NWRN IA INTO
E-CNTRL AND SWRN NEB WHERE IT IS SURGING SWD. ELEVATED STORMS ARE
DEVELOPING WITHIN ZONE OF DEEPER POST FRONTAL ASCENT FROM NERN
NEB...SERN SD AND NWRN IA. SWLY LLJ WILL GRADUALLY SHIFT EWD THROUGH
THE UPPER MS VALLEY TONIGHT IN ASSOCIATION WITH PROGRESSIVE
SHORTWAVE TROUGH MOVING THROUGH ND. THIS FEATURE WILL HELP MAINTAIN
ISENTROPIC LIFT AND MOIST INFLOW FROM WARM SECTOR INTO THE FRONTAL
ZONE NEXT FEW HOURS. DESPITE BEING ELEVATED...STORMS ARE DEVELOPING
ALONG NRN FRINGE OF STEEP LAPSE RATE PLUME WHICH IN ADDITION TO
35-40 KT EFFECTIVE SHEAR WILL SUPPORT POTENTIAL FOR STRONGER
UPDRAFTS...ESPECIALLY AS ACTIVITY CONTINUES EAST THROUGH AXIS OF
STRONGER /1500-2000 J/KG/ MUCAPE NEXT COUPLE HOURS.

..DIAL.. 09/02/2011

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

ATTN...WFO...ARX...MPX...DMX...FSD...

LAT...LON 43039614 43559467 44029302 43969199 43279154 42579502
43039614

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