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446 

WWUS20 KWNS 212359

SEL8

SPC WW 212359

TXZ000-220600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 208

NWS STORM PREDICTION CENTER NORMAN OK

655 PM CDT TUE MAY 21 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  SOUTHEAST TEXAS



* EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 655 PM

  UNTIL 100 AM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75

STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES NORTHEAST OF

LUFKIN TEXAS TO 30 MILES SOUTHEAST OF COLLEGE STATION TEXAS.  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 201...WW 203...WW

204...WW 205...WW 206...WW 207...



DISCUSSION...SRN END OF NE TX SQLN EXPECTED TO CONTINUE E TOWARD THE

SABINE RVR VLY THROUGH THE EVE. FORWARD-PROPAGATING/BOWING SEGMENTS

WILL BE FOSTERED BY CONTINUED 20 KT INFLOW OF MOIST SLY FLOW BENEATH

DIFFLUENT...WLY...UPR-LVL FLOW BETWEEN POLAR AND SUB-TROPICAL JETS.

WHILE A TORNADO CANNOT BE RULED OUT...EXISTING QUASI-LINEAR STORM

MODE AND LIKELY CONTINUED PRESENCE OF SUBSTANTIAL EML CAP... SAMPLED

BY SPECIAL 18Z SOUNDING MADE BY TEXAS A & M UNIV...SUGGEST THAT SUCH

POTENTIAL SHOULD REMAIN ISOLD AND THAT MAIN SVR THREAT SHOULD BE

LOCALLY DMGG WIND.



AVIATION...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 26030.





...CORFIDI

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