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581 

WWUS20 KWNS 171443

SEL1

SPC WW 171443

IAZ000-ILZ000-INZ000-MOZ000-WIZ000-LMZ000-172200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 561

NWS STORM PREDICTION CENTER NORMAN OK

840 AM CST SUN NOV 17 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  EASTERN IOWA

  ILLINOIS

  NORTHWEST INDIANA

  NORTHEAST MISSOURI

  SOUTHEAST WISCONSIN

  LAKE MICHIGAN



* EFFECTIVE THIS SUNDAY MORNING AND AFTERNOON FROM 840 AM UNTIL

  400 PM CST.



...THIS IS A PARTICULARLY DANGEROUS SITUATION...



* PRIMARY THREATS INCLUDE...

  SEVERAL INTENSE TORNADOES LIKELY

  SEVERAL LARGE HAIL EVENTS LIKELY WITH A FEW VERY LARGE HAIL

    EVENTS TO 2 INCHES IN DIAMETER POSSIBLE

  SEVERAL DAMAGING WIND GUSTS WITH A FEW SIGNIFICANT GUSTS TO 80

    MPH POSSIBLE



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 100 STATUTE

MILES EAST AND WEST OF A LINE FROM 25 MILES SOUTH SOUTHEAST OF

SCOTT AFB ILLINOIS TO 40 MILES NORTHEAST OF MADISON WISCONSIN.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU1).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH

AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR

THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS

AND POSSIBLE WARNINGS.



&&



DISCUSSION...ONE OR MORE BROKEN BANDS OF SUPERCELLS ARE EXPECTED TO

DEVELOP THIS MORNING AND RAPIDLY SPREAD EAST/NORTHEAST ACROSS THE

WATCH AREA TODAY.  GIVEN THE COMBINATION OF MODERATE INSTABILITY AND

VERY STRONG VERTICAL SHEAR...CONDITIONS WILL BE FAVORABLE FOR LONG

TRACKED...SIGNIFICANT TORNADOES.  LARGE HAIL AND CORRIDORS OF WIND

DAMAGE WILL ALSO BE LIKELY.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 24050.





...MEAD

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