ZCZC SPCSWOMCD ALL
ACUS11 KWNS 092146 
SPC MCD 092146 
WIZ000-092315-

MESOSCALE DISCUSSION 0256
NWS STORM PREDICTION CENTER NORMAN OK
0446 PM CDT THU APR 09 2015

AREAS AFFECTED...PORTIONS OF SOUTHERN/CENTRAL WI

CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 

VALID 092146Z - 092315Z

PROBABILITY OF WATCH ISSUANCE...40 PERCENT

SUMMARY...NORTH OF A SURFACE-BASED SEVERE THREAT ACROSS NORTHERN IL
INTO FAR SOUTHERN WI...MAINLY ELEVATED STORMS MAY POSE AT LEAST AN
ISOLATED SEVERE HAIL THREAT INTO THIS EVENING ACROSS PORTIONS OF
SOUTHERN INTO EAST-CENTRAL WI.

DISCUSSION...AHEAD OF A STEADILY DEEPENING SURFACE LOW...A WARM
FRONT WILL CONTINUE TO SLOWLY SPREAD NORTHWARD ALONG THE IL/WI
BORDER VICINITY THROUGH THIS EVENING. TO THE NORTH OF THE WARM
FRONT/S NORTHWARD ADVANCE...INCREASING WARM ADVECTION/ISENTROPIC
ASCENT SHOULD CONTRIBUTE TO ADDITIONAL MAINLY ELEVATED THUNDERSTORM
DEVELOPMENT ACROSS PORTIONS OF SOUTHERN WI INTO
SOUTH-CENTRAL/EVENTUALLY EAST-CENTRAL WI. SUFFICIENT ELEVATED
BUOYANCY AND VERTICAL SHEAR THROUGH THE CLOUD-BEARING LAYER MAY
CONTRIBUTE TO ISOLATED BOUTS OF SEVERE HAIL TO THE NORTH OF THE WARM
FRONT-RELATED SURFACE BASED SEVERE RISK ACROSS NORTHERN IL/FAR
SOUTHERN WI.

..GUYER/HART.. 04/09/2015

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

ATTN...WFO...GRB...MKX...ARX...

LAT...LON   43268780 43208878 42788974 42639025 43559037 44218813
            43948741 43348772 43268780 

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