

754 

WWUS20 KWNS 131930

SEL9

SPC WW 131930

ILZ000-140300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 539

NWS STORM PREDICTION CENTER NORMAN OK

225 PM CDT MON OCT 13 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  CENTRAL AND EASTERN ILLINOIS



* EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 225 PM UNTIL

  1000 PM CDT.



* PRIMARY THREATS INCLUDE...

  A COUPLE TORNADOES POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE

MILES EAST AND WEST OF A LINE FROM 50 MILES NORTH NORTHEAST OF

BLOOMINGTON ILLINOIS TO 50 MILES SOUTH SOUTHWEST OF MATTOON

ILLINOIS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



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 535...WW 536...WW

537...WW 538...



DISCUSSION...GIVEN RICH MOISTURE...CONVERGENCE WITHIN NRN PART OF

EXTENSIVE SSW-NNE LWR-MID MS VLY SQLN MAY BE SUFFICIENT TO SUPPORT

ADDITIONAL UPDRAFT DEVELOPMENT IN ZONE OF STRENGTHENING SSWLY DEEP

SHEAR ORIENTED PARALLEL TO THE LINE. THIS SETUP MAY FOSTER A

CONDITIONAL RISK FOR SHORT-LIVED TORNADOES FROM SHOWERS/WEAK

TSTMS...DESPITE FEEBLE LOW TO MID-LVL LAPSE RATES. SUPPORT FOR

DEVELOPMENT ALSO WILL BE ENHANCED BY INCREASING ASCENT WITH THE

CONTINUED EWD MOTION OF SRN PLNS UPR TROUGH.



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

SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

300. MEAN STORM MOTION VECTOR 20040.





...CORFIDI



004 

WWUS20 KWNS 131930

SEL9

SPC WW 131930

ILZ000-140300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 539

NWS STORM PREDICTION CENTER NORMAN OK

225 PM CDT MON OCT 13 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  CENTRAL AND EASTERN ILLINOIS



* EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 225 PM UNTIL

  1000 PM CDT.



* PRIMARY THREATS INCLUDE...

  A COUPLE TORNADOES POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE

MILES EAST AND WEST OF A LINE FROM 50 MILES NORTH NORTHEAST OF

BLOOMINGTON ILLINOIS TO 50 MILES SOUTH SOUTHWEST OF MATTOON

ILLINOIS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



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 535...WW 536...WW

537...WW 538...



DISCUSSION...GIVEN RICH MOISTURE...CONVERGENCE WITHIN NRN PART OF

EXTENSIVE SSW-NNE LWR-MID MS VLY SQLN MAY BE SUFFICIENT TO SUPPORT

ADDITIONAL UPDRAFT DEVELOPMENT IN ZONE OF STRENGTHENING SSWLY DEEP

SHEAR ORIENTED PARALLEL TO THE LINE. THIS SETUP MAY FOSTER A

CONDITIONAL RISK FOR SHORT-LIVED TORNADOES FROM SHOWERS/WEAK

TSTMS...DESPITE FEEBLE LOW TO MID-LVL LAPSE RATES. SUPPORT FOR

DEVELOPMENT ALSO WILL BE ENHANCED BY INCREASING ASCENT WITH THE

CONTINUED EWD MOTION OF SRN PLNS UPR TROUGH.



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

SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

300. MEAN STORM MOTION VECTOR 20040.





...CORFIDI

