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240 

WWUS20 KWNS 210222

SEL8

SPC WW 210222

INZ000-OHZ000-210900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 18

NWS STORM PREDICTION CENTER NORMAN OK

920 PM EST THU FEB 20 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHEAST INDIANA

  NORTHERN AND WESTERN OHIO



* EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 920 PM

  UNTIL 400 AM EST.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55

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

TOLEDO OHIO TO 35 MILES SOUTHWEST OF DAYTON OHIO.  FOR A COMPLETE

DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE

(WOUS64 KWNS WOU8).



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 11...WW 14...WW 15...WW

16...WW 17...



DISCUSSION...NRN END OF COLD FRONTAL SQLN NOW E IND EXPECTED TO

CONTINUE NNEWD INTO NW OH LATER TNGT AS MID-LVL FLOW CONTINUES TO

BACK AND STRENGTHEN AHEAD OF POTENT MIDWESTERN SHORTWAVE TROUGH.

AREA SFC AND VWP DATA...MEANWHILE...SHOW SUBSTANTIAL LOW-LVL WLY

COMPONENT TO WINDS BEHIND COLD FRONT IN NRN IND. COUPLED WITH

INCREASING FORCING FOR ASCENT AND STRENGTHENING OF DEEP WIND

FIELD...SETUP APPEARS SUPPORTIVE OF SPORADIC DMGG SFC

GUSTS...DESPITE SHALLOW BOUNDARY LAYER INVERSION/SNOW COVER OVER

REGION.



AVIATION...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 350. MEAN STORM

MOTION VECTOR 23055.





...CORFIDI

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