ACUS11 KWNS 092013
SWOMCD
MESOSCALE DISCUSSION 0251
NWS STORM PREDICTION CENTER NORMAN OK
0312 PM CDT THU APR 09 2015
AREAS AFFECTED...NE MO...SE IA...NRN/CNTRL IL...FAR SE WI
CONCERNING...TORNADO WATCH 39...41...
VALID 092012Z - 092145Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 39...41...CONTINUES.
SUMMARY...THREAT FOR ALL SEVERE HAZARDS...INCLUDING
TORNADOES...CONTINUES ACROSS THE REGION WITH THE PRIMARY THREAT
CURRENTLY FOCUSED ACROSS WW 39. RISK STILL EXISTS IN WW 41 WITH ANY
DISCRETE CELLS THAT DEVELOP AHEAD OF THE FRONT.
DISCUSSION...RECENT RADAR IMAGERY DEPICTS A LINE OF STRONG TO SEVERE
TSTMS ALONG THE COLD FRONT EXTENDING FROM S-CNTRL IA SWWD THROUGH
CNTRL MO. SUPERCELL THAT PRODUCED A TORNADO IN PEORIA COUNTY IL HAS
NOW WEAKENED WITH THE MOST IMMEDIATELY APPARENT SEVERE THREAT
CURRENTLY RELEGATED TO WW 39. SKIES ARE CLEARING BEHIND THE MCV /AND
AHEAD OF THE COLD FRONT/ WITH THE ENVIRONMENT CURRENTLY
CHARACTERIZED BY TEMPERATURES IN THE MID 70S...DEWPOINTS IN THE MID
60S...AND SWLY WINDS AROUND 20 MPH. THESE WARM AND MOIST LOW-LEVEL
CONDITIONS CONTINUE TO SUPPORT MLCAPE AROUND 1500-2000 J/KG DESPITE
RELATIVELY MODEST MID-LEVEL LAPSE RATES. FORCING WITHIN THE WARM
SECTOR WILL BE RATHER NEBULOUS BUT A RISK FOR ALL SEVERE HAZARDS
EXISTS WITH IF ANY DISCRETE DEVELOPMENT DOES OCCUR. FARTHER W ACROSS
WW 39...ACTIVITY WILL LIKELY PERSIST WITH A GRADUAL INCREASE IN
STORM ORGANIZATION AS LARGE SCALE ASCENT CONTINUES TO APPROACH FROM
THE W.
..MOSIER.. 04/09/2015
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...IND...LOT...ILX...MKX...LSX...DVN...DMX...EAX...
LAT...LON 41659308 42439134 42638815 41378726 40118753 39009084
38659346 41659308
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