SWOMCD
SPC MCD 042122
ILZ000-MOZ000-042245-
MESOSCALE DISCUSSION 0184
NWS STORM PREDICTION CENTER NORMAN OK
0322 PM CST FRI MAR 04 2011
AREAS AFFECTED...E CNTRL MO INTO W CNTRL IL
CONCERNING...SEVERE THUNDERSTORM WATCH 36...
VALID 042122Z - 042245Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 36
CONTINUES.
THE REMAINDER OF THE NORTHERN ST. LOUIS METRO AREA...INCLUDING ST.
LOUIS CITY...MAY NEED TO BE ADDED TO WW 36. PARTS OF W CNTRL/CNTRL
IL WILL NEED TO BE MONITORED FOR THE POSSIBILITY OF AN ADDITIONAL
WW.
A SMALL CONVECTIVE CLUSTER CONTINUES TO EVOLVE NEAR A WEAK FRONTAL
WAVE OVER CENTRAL MISSOURI. FORCING ASSOCIATED WITH LOWER/MID
TROPOSPHERIC WARM ADVECTION APPEARS TO HAVE BEEN ENHANCED BY A 50 KT
500 SPEED MAXIMUM...WHICH LATEST RUC GUIDANCE INDICATES WILL
PROPAGATE EAST NORTHEASTWARD INTO CENTRAL ILLINOIS BY EARLY THIS
EVENING. AS THIS OCCURS...AND THE EVOLVING SQUALL LINE PROGRESSES
EASTWARD WITHIN A NARROW CORRIDOR OF STRONGER BOUNDARY LAYER HEATING
AND MODESTLY STEEP LOW-LEVEL LAPSE RATES...THE DOWNWARD TRANSFER OF
HIGHER MOMENTUM AIR MAY YIELD INCREASING DAMAGING WIND POTENTIAL
NEAR THE INTERSTATE 70 CORRIDOR EAST OF COLUMBIA INTO THE ST. LOUIS
AREA BY 00-01Z.
..KERR.. 03/04/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...ILX...LSX...SGF...
LAT...LON 38299279 38909249 39279145 39859067 40159006 39848915
38749004 38289089 37949196 37979268 38299279
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