SWOMCD
SPC MCD 082247
ILZ000-WIZ000-IAZ000-082345-
MESOSCALE DISCUSSION 0767
NWS STORM PREDICTION CENTER NORMAN OK
0547 PM CDT FRI MAY 08 2009
AREAS AFFECTED...ERN IS..SW WI...NW IL
CONCERNING...SEVERE POTENTIAL...WATCH LIKELY
VALID 082247Z - 082345Z
A SMALL WW MAY BE REQUIRED E OF WW 270 FOR MAINLY A DAMAGING WIND
THREAT.
A CLUSTER OF STORMS CONTINUES TO MOVE EWD ACROSS E CNTRL IA...NEAR A
SMALL SURFACE LOW AND ALONG A COLD FRONT. SURFACE ANALYSIS SHOWS
PRESSURE FALLS AHEAD OF THIS LOW...WITH PROFILERS AND MODEL FORECAST
SOUNDINGS INDICATING STRENGTHENING WIND FIELDS AHEAD OF THIS FEATURE
FAVORING LONG LIVED SEVERE CONVECTION.
INSTABILITY IS WEAK BUT SUFFICIENT GIVEN THE STRONG FORCING.
FURTHER...MID TO UPPER 50S DEWPOINTS WILL CONTINUE TO STREAM NWD
AHEAD OF THE COLD FRONT. AN E-W ZONE ROUGHLY ALONG THE I-80 CORRIDOR
MAY SEE A LOCALIZED SEVERE WIND THREAT...SHIFTING EWD INTO IL AND
PERHAPS SRN WI LATER THIS EVENING. THE LOCALIZED STRENGTHENING AND
BACKING OF THE LOW LEVEL WINDS NEAR THE LOW AND ALONG THE DEVELOPING
WARM FRONT MAY ALSO RESULT IN AN ISOLATED TORNADO THREAT.
..JEWELL.. 05/08/2009
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...LOT...ILX...MKX...DVN...ARX...DMX...
LAT...LON 42599291 42829193 42929132 43039060 43089006 43078952
42898888 42318855 41568899 41088975 40749099 40689287
40739354 41519327 42169299 42599291
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