SPC Tornado Watch 119

WW 119 TORNADO IL KS MO 180255Z – 181000Z


URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 119
NWS STORM PREDICTION CENTER NORMAN OK
955 PM CDT WED APR 17 2013

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF
  A SMALL PART OF WEST CENTRAL ILLINOIS
  EXTREME SOUTHEAST KANSAS
  SOUTHWEST...CENTRAL...AND NORTHEAST MISSOURI

* EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 955 PM
  UNTIL 500 AM CDT.

* PRIMARY THREATS INCLUDE...
  SEVERAL TORNADOES POSSIBLE
  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
  A FEW LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE
MILES EAST AND WEST OF A LINE FROM 90 MILES NORTHEAST OF COLUMBIA
MISSOURI TO 15 MILES EAST SOUTHEAST OF GROVE OKLAHOMA.  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...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 114. WATCH NUMBER 114 WILL NOT BE IN EFFECT AFTER
955 PM CDT. CONTINUE...WW 116...WW 117...WW 118...

DISCUSSION...CONVECTION ALONG COLD FRONT IS EXPECTED TO CONSOLIDATE
INTO A MORE SOLID SQUALL LINE OVERNIGHT AS A WEAK SURFACE WAVE
GRADUALLY FORMS ACROSS CENTRAL MO.  THOUGH THE BOUNDARY LAYER WILL
STABILIZE GRADUALLY OVERNIGHT...THE PRESENCE OF LOW 60S DEW POINTS
WILL MAINTAIN SURFACE-BASED STORMS.  MEANWHILE...THE LLJ WILL
CONTINUE TO STRENGTHEN...RESULTING IN STRONG LOW-LEVEL SHEAR AND AN
ATTENDANT RISK FOR EMBEDDED CIRCULATIONS WITH A COUPLE OF TORNADOES.
 OTHERWISE...DAMAGING WINDS AND ISOLATED/MARGINALLY SEVERE HAIL WILL
BE POSSIBLE WITH THE STRONGER STORMS OVERNIGHT.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 22040.


...THOMPSON

via SPC Forecast Products http://www.spc.noaa.gov/products/watch/ww0119.html