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036 

WWUS20 KWNS 201937

SEL0

SPC WW 201937

ILZ000-MOZ000-210100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 10

NWS STORM PREDICTION CENTER NORMAN OK

140 PM CST THU FEB 20 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  WEST CENTRAL ILLINOIS

  EAST CENTRAL MISSOURI



* EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 140 PM UNTIL

  700 PM CST.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  A FEW TORNADOES POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80

STATUTE MILES EAST AND WEST OF A LINE FROM 70 MILES NORTH

NORTHWEST OF ALTON ILLINOIS TO 35 MILES SOUTH SOUTHWEST OF SCOTT

AFB ILLINOIS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 9...



DISCUSSION...A BROKEN BAND OF STORMS CONTINUES TO DEVELOP ALONG THE

RESIDUAL DRYLINE/COLD FRONT SURGING EWD ACROSS MO.  A NARROW

CORRIDOR OF SOMEWHAT ENHANCED SURFACE HEATING HAS DEVELOPED AS THE

WARM SECTOR SPREADS A LITTLE NWD.  WIND PROFILES ARE FAVORABLE FOR

SUPERCELLS...THOUGH THE SHEAR HAS BEEN A BIT STRONG FOR THE

INSTABILITY THUS FAR.  EXPECT A FEW DAMAGING GUSTS AND MARGINALLY

SEVERE HAIL WITH THE STRONGEST STORMS...THOUGH A TORNADO CANNOT BE

RULED OUT GIVEN THE FAST-MOVING SUPERCELLS BRIEFLY INTERACTING WITH

THE WARM FRONT.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.

A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM MOTION

VECTOR 23055.





...THOMPSON

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