MESO: Mesoscale Discussion 1420

ACUS11 KWNS 082100
SWOMCD
SPC MCD 082100
MIZ000-WIZ000-MNZ000-082200-

MESOSCALE DISCUSSION 1420
NWS STORM PREDICTION CENTER NORMAN OK
0400 PM CDT SUN JUL 08 2007

AREAS AFFECTED...SRN MN...NRN/CNTRL WI...WRN/CNTRL U.P. OF MI

CONCERNING...SEVERE THUNDERSTORM WATCH 492...

VALID 082100Z - 082200Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 492
CONTINUES.

INITIAL AREA OF SUPERCELLS WHICH DEVELOPED JUST E OF STC HAS NOW
PROGRESSED INTO W-CNTRL WI /BARRON AND DUNN COUNTIES/. THESE CELLS
HAVE TAKEN ON A NORTH-TO-SOUTH ORIENTATION AND APPEAR TO BE
ACCELERATING EWD. WITH THE GREATEST INSTABILITY LYING TO THE EAST OF
THESE TSTMS /MLCAPES AROUND 4000 J/KG/...AN ENHANCED THREAT FOR
DAMAGING WINDS APPEARS LIKELY OVER THE NEXT FEW HOURS ACROSS N-CNTRL
WI FROM EAU TO RHI. FARTHER W OF THIS CONVECTION...OCCASIONAL
SUPERCELL STRUCTURES WITH UPSCALE GROWTH TO MULTICELLULAR CLUSTERS
SHOULD CONTINUE ACROSS E-CNTRL MN AND THE TWIN CITIES METRO AREA.
LARGE HAIL WITH ISOLATED DAMAGING WINDS SHOULD REMAIN THE PRIMARY
SEVERE THREAT WITH THIS ACTIVITY INTO EARLY EVENING. WEST TO EAST
BANDS OF TRAINING CONVECTION WILL ALSO POSE A HEAVY RAIN THREAT WITH
LATEST GPS PRECIPITABLE WATER ESTIMATES BETWEEN 1.75 TO 2.00 INCHES.

.GRAMS.. 07/08/2007

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

ATTN...WFO...APX...MQT...GRB...DLH...ARX...MPX...

44039192 43539321 43809435 44459483 45059466 45579371
45859228 45999079 46428914 46658639 45908568 44898739
44338987

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