

453 

WWUS20 KWNS 191920

SEL2

SPC WW 191920

OKZ000-200400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 182

NWS STORM PREDICTION CENTER NORMAN OK

215 PM CDT SUN MAY 19 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  CENTRAL AND EASTERN OKLAHOMA



* EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 215 PM UNTIL

  1100 PM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL TORNADOES LIKELY WITH A FEW INTENSE TORNADOES POSSIBLE

  NUMEROUS LARGE HAIL EVENTS LIKELY WITH A FEW VERY LARGE HAIL

    EVENTS TO 3 INCHES IN DIAMETER POSSIBLE

  SEVERAL DAMAGING WIND GUSTS WITH A FEW SIGNIFICANT GUSTS TO 80

    MPH POSSIBLE



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 105 STATUTE

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

BARTLESVILLE OKLAHOMA TO 25 MILES SOUTH OF ARDMORE OKLAHOMA.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU2).



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 179...WW 180...WW 181...



DISCUSSION...THE INITIATION OF DISCRETE SUPERCELLS APPEARS LIKELY

ALONG THE DRYLINE ACROSS CENTRAL OKLAHOMA DURING THE NEXT FEW

HOURS...BEFORE ADVECTING AWAY FROM THE DRYLINE ON 40-50 KT DEEP

LAYER SOUTHWESTERLY MEAN FLOW.  AS ACTIVITY PROGRESSES THROUGH A

MOIST UNSTABLE BOUNDARY LAYER WITH SIZABLE CAPE...THE RISK FOR VERY

LARGE HAIL AND TORNADOES IS EXPECTED TO INCREASE THROUGH THE EVENING

HOURS.  BY EARLY EVENING...A STRENGTHENING SOUTHERLY LOW-LEVEL JET

WILL CONTINUE TO ENLARGE LOW-LEVEL HODOGRAPHS...MAINTAINING THE RISK

FOR TORNADOES ACROSS EASTERN OKLAHOMA.  A COUPLE OF LONG-LIVED/LONG

TRACK SUPERCELLS ARE POSSIBLE...WITH A RISK FOR A FEW STRONG

TORNADOES.



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

SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE

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

500. MEAN STORM MOTION VECTOR 25040.





...KERR

