

145 

WWUS20 KWNS 091849

SEL1

SPC WW 091849

ILZ000-INZ000-WIZ000-LMZ000-100400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 41

NWS STORM PREDICTION CENTER NORMAN OK

150 PM CDT THU APR 9 2015



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  NORTHERN AND CENTRAL ILLINOIS

  FAR NORTHWEST INDIANA

  FAR SOUTHERN WISCONSIN

  LAKE MICHIGAN



* EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 150 PM UNTIL

  1100 PM CDT.



* PRIMARY THREATS INCLUDE...

  A FEW TORNADOES LIKELY WITH A COUPLE INTENSE TORNADOES POSSIBLE

  SCATTERED DAMAGING WINDS LIKELY WITH ISOLATED SIGNIFICANT GUSTS

    TO 80 MPH POSSIBLE

  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2.5

    INCHES IN DIAMETER POSSIBLE



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 80 STATUTE

MILES EAST AND WEST OF A LINE FROM 15 MILES NORTHWEST OF

MILWAUKEE WISCONSIN TO 25 MILES SOUTHWEST OF DECATUR ILLINOIS.

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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 39...WW 40...



DISCUSSION...TWO ROUNDS OF SEVERE CONVECTION ARE EXPECTED WITH

INITIAL STORMS IN CENTRAL ILLINOIS DEVELOPING E/NE AND ADDITIONAL

STORMS ALONG A FRONTAL ZONE. BOTH AREAS WILL HAVE STRONG DEEP-LAYER

SHEAR SUPPORTING RISKS FOR A FEW TORNADOES...LARGE HAIL AND DAMAGING

WINDS.



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

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

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

500. MEAN STORM MOTION VECTOR 24040.





...GRAMS/CORFIDI



497 

WWUS20 KWNS 091849

SEL1

SPC WW 091849

ILZ000-INZ000-WIZ000-LMZ000-100400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 41

NWS STORM PREDICTION CENTER NORMAN OK

150 PM CDT THU APR 9 2015



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  NORTHERN AND CENTRAL ILLINOIS

  FAR NORTHWEST INDIANA

  FAR SOUTHERN WISCONSIN

  LAKE MICHIGAN



* EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 150 PM UNTIL

  1100 PM CDT.



* PRIMARY THREATS INCLUDE...

  A FEW TORNADOES LIKELY WITH A COUPLE INTENSE TORNADOES POSSIBLE

  SCATTERED DAMAGING WINDS LIKELY WITH ISOLATED SIGNIFICANT GUSTS

    TO 80 MPH POSSIBLE

  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2.5

    INCHES IN DIAMETER POSSIBLE



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 80 STATUTE

MILES EAST AND WEST OF A LINE FROM 15 MILES NORTHWEST OF

MILWAUKEE WISCONSIN TO 25 MILES SOUTHWEST OF DECATUR ILLINOIS.

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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 39...WW 40...



DISCUSSION...TWO ROUNDS OF SEVERE CONVECTION ARE EXPECTED WITH

INITIAL STORMS IN CENTRAL ILLINOIS DEVELOPING E/NE AND ADDITIONAL

STORMS ALONG A FRONTAL ZONE. BOTH AREAS WILL HAVE STRONG DEEP-LAYER

SHEAR SUPPORTING RISKS FOR A FEW TORNADOES...LARGE HAIL AND DAMAGING

WINDS.



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

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

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

500. MEAN STORM MOTION VECTOR 24040.





...GRAMS/CORFIDI

