SWOMCD
SPC MCD 251910
WIZ000-IAZ000-MNZ000-252015-
MESOSCALE DISCUSSION 0729
NWS STORM PREDICTION CENTER NORMAN OK
0210 PM CDT FRI APR 25 2008
AREAS AFFECTED...WI
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 251910Z - 252015Z
LATEST DIAGNOSTIC DATA INDICATES SFC LOW CONTINUES TO LIFT NWD AND
IS NOW INTO EXTREME SERN MN WHERE SFC TEMPERATURES HAVE WARMED INTO
THE 60S. DOWNSTREAM...WARM FRONT HAS RETREATED ACROSS SRN WI AND
AIRMASS IS BECOMING MORE BUOYANT ACROSS THIS PORTION OF THE WARM
SECTOR. 18Z SOUNDINGS FROM DVN AND ILX SUGGEST EML HAS YET TO BE
REMOVED WITH SIGNIFICANT CAPPING STILL EVIDENT ESPECIALLY AT DVN.
HOWEVER...LARGE SCALE ASCENT IS ACTING ON THE WARM SECTOR...PER
RECENT EXPANSION OF BOUNDARY LAYER STRATUS...AND INHIBITION WILL
WEAKEN SUFFICIENTLY FOR THUNDERSTORM DEVELOPMENT ACROSS SRN WI OVER
THE NEXT FEW HOURS. ADDITIONALLY...RADAR DATA ACROSS SERN MN
INDICATES A NARROW LINE OF FORCED REFLECTIVITY THAT EXTENDS FROM
MCLEOD COUNTY MN...SEWD TO STEELE COUNTY MN. LATEST THINKING IS
ONGOING THUNDERSTORMS WILL SPREAD NEWD OUT OF IA INTO SWRN WI...WITH
NEW DEVELOPMENT POSSIBLE ALONG AFOREMENTIONED LINE OVER SERN MN.
ALTHOUGH LAPSE RATES ARE SOMEWHAT OF AN ISSUE...IT APPEARS SEVERE
THREAT WILL GRADUALLY INCREASE ACROSS WI SOUTH OF THE WARM FRONT.
ISOLATED TORNADOES...OR PERHAPS SOME HAIL AND DAMAGING WINDS MAY
OCCUR WITH STRONGEST STORMS.
..DARROW.. 04/25/2008
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...GRB...MKX...ARX...MPX...
42629062 43549139 44429230 45259121 44598901 43658801
42568846
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