Severe Storm Outlook Narrative (AC)
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000
ACUS11 KWNS 200642
SWOMCD
SPC MCD 200641 COR
WIZ000-ILZ000-200800-

MESOSCALE DISCUSSION 0722
NWS STORM PREDICTION CENTER NORMAN OK
0141 AM CDT MON MAY 20 2013

AREAS AFFECTED...PARTS OF SRN/CENTRAL WI

CONCERNING...TORNADO WATCH 187...

VALID 200641Z - 200800Z

CORRECTED TO CHANGE WATCH TYPE FOR WW 187.

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 187 CONTINUES.

SUMMARY...PRIMARY THREAT THROUGH 08Z WILL BE LOCALLY STRONG/DAMAGING
WINDS...WHILE THE TORNADO THREAT HAS CONTINUED TO DIMINISH.  THE
DAMAGING WIND THREAT IS FORECAST TO BECOME MORE LIMITED WITH NEWD
EXTENT...THOUGH A NON-ZERO THREAT WILL EXTENT INTO PARTS OF
CENTRAL-EAST CENTRAL WI TO THE N/NE OF WW 187.

COUNTIES CAN CONTINUE TO BE CANCELLED WITH THE PASSAGE OF THE
CONVECTIVE LINE.

DISCUSSION...TRENDS IN REGIONAL RADAR IMAGERY SHOWED A LINE OF
STORMS MOVING ENEWD AT 40 KT WHICH COULD CONTINUE TO POSE A THREAT
FOR LOCALLY STRONG/DAMAGING WIND GUSTS INTO PARTS OF CENTRAL WI
DURING THE EARLY OVERNIGHT PERIOD.  DESPITE CONTINUED BOUNDARY LAYER
STABILIZATION...STRONGER WIND GUSTS HAVE BEEN ABLE TO REACH THE
SURFACE /52 KT GUST AT KLNR AT 0537Z/.  THUS...THE CURRENT SPEED OF
THE STORMS COMBINED WITH 50-60 KT SLY LLJ ACROSS THIS REGION MAY
ALLOW FOR ADDITIONAL STRONGER GUSTS TO REACH THE SURFACE THROUGH
08Z.

OVERALL REDUCTION IN LIGHTNING COVERAGE AND CAPPI RADAR IMAGERY AS
STORMS MOVE AWAY FROM GREATER INSTABILITY SUGGESTS THE DIMINISHING
TREND IN THE SEVERE WEATHER THREAT WILL PERSIST...WITH NEW WW
ISSUANCE UNLIKELY.

..PETERS/HART.. 05/20/2013

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

ATTN...WFO...GRB...LOT...MKX...DVN...ARX...

LAT...LON   42568874 42398966 43328980 43949008 44329020 44428980
            44468911 44238832 43698821 43068848 42568874
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