MESO: Mesoscale Discussion 1907

ACUS11 KWNS 280205
SWOMCD
SPC MCD 280205
MIZ000-MNZ000-WIZ000-280300-

MESOSCALE DISCUSSION 1907
NWS STORM PREDICTION CENTER NORMAN OK
0905 PM CDT MON AUG 27 2007

AREAS AFFECTED...E CNTRL AND NERN MN THROUGH NWRN WI

CONCERNING...SEVERE THUNDERSTORM WATCH 655...656...

VALID 280205Z - 280300Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
655...656...CONTINUES.

THREAT FOR ISOLATED LARGE HAIL AND POSSIBLY DAMAGING WIND WILL
PERSIST NEXT COUPLE HOURS FROM PARTS OF E CNTRL AND NERN MN THROUGH
NWRN WI. OVERALL SEVERE THREAT DOES NOT APPEAR AS ROBUST AS EARLIER
IN THE EVENING...AND THREAT WILL GRADUALLY END FROM WEST TO EAST AND
REMAINING PARTS OF WW 655 SHOULD BE ALLOWED TO EXPIRE BY 03Z.

THIS EVENING A COLD FRONT EXTENDS FROM EXTREME NWRN WI SWWD THROUGH
SWRN MN AND INTO SERN SD. WARM FRONT EXTENDS FROM A WEAK LOW IN SWRN
MN SEWD THROUGH WRN WI. A CLUSTER OF ELEVATED STORMS CONTINUES FROM
E CNTRL MN INTO EXTREME NW WI GENERALLY N OF THE COLD FRONT.
ACTIVITY IS DEVELOPING WITHIN ZONE OF ISENTROPIC ASCENT ASSOCIATED
WITH A SWLY LOW LEVEL JET. THE LOW LEVEL JET WILL GRADUALLY VEER AS
SHORTWAVE TROUGH CONTINUES EWD THROUGH NRN MN WITH STORMS ENDING
FROM THE WEST. STORMS HAVE TAKEN ON A MORE LINEAR STRUCTURE...THOUGH
SOME EVIDENCE OF MID LEVEL ROTATION EXISTS WITH STORMS ON SRN END OF
LINE. TRANSITION TO A MORE LINEAR MODE SUGGESTS THAT OVERALL HAIL
THREAT IS NOT AS HIGH AS PREVIOUSLY IN THE EVENING. THOUGH STORMS
ARE ELEVATED...SOME POTENTIAL EXIST FOR STRONG WIND GUSTS TO REACH
THE SURFACE.

.DIAL.. 08/28/2007

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

ATTN...WFO...MQT...DLH...MPX...FGF...

46578999 46049210 45879456 46329489 47039358 47479196
47639014

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