SEL7
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 77
   NWS STORM PREDICTION CENTER NORMAN OK
   1150 AM CDT FRI MAR 27 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          SOUTHEAST TEXAS
          COASTAL WATERS
   
   EFFECTIVE THIS FRIDAY MORNING AND AFTERNOON FROM 1150 AM UNTIL
   500 PM CDT.
   
   HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
   MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80
   STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES NORTHEAST OF
   HUNTSVILLE TEXAS TO 10 MILES SOUTHWEST OF HOUSTON TEXAS.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
   UPDATE (WOUS64 KWNS WOU7).
   
   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 76...
   
   DISCUSSION...A CLUSTER OF INITIALLY ELEVATED THUNDERSTORMS IN
   CENTRAL TX APPEARS TO BE EVOLVING INTO SURFACE-BASED STORMS AS THE
   LOW LEVELS MOISTEN/DESTABILIZE ACROSS SE TX.  THIS STORM CLUSTER IS
   ASSOCIATED WITH A BAND OF LOW-MID LEVEL ASCENT MOVING EWD IN ADVANCE
   OF THE MID LEVEL TROUGH OVER W TX...WHILE A REMNANT OUTFLOW BOUNDARY
   LIFTING NWD ACROSS SE TX/SW LA WILL PROVIDE A CORRIDOR FOR THE
   STORMS TO TRAVEL EWD.  THE COMBINATION OF MODERATE INSTABILITY AND
   DEEP LAYER SHEAR WILL SUPPORT BOTH SUPERCELLS AND EMBEDDED
   BOWS...WITH DAMAGING WINDS AND LARGE HAIL THE PRIMARY SEVERE THREATS
   THROUGH THE AFTERNOON.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
   MOTION VECTOR 27030.
   
   
   ...THOMPSON

   SEL7
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 77
   NWS STORM PREDICTION CENTER NORMAN OK
   1150 AM CDT FRI MAR 27 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          SOUTHEAST TEXAS
          COASTAL WATERS
   
   EFFECTIVE THIS FRIDAY MORNING AND AFTERNOON FROM 1150 AM UNTIL
   500 PM CDT.
   
   HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
   MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80
   STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES NORTHEAST OF
   HUNTSVILLE TEXAS TO 10 MILES SOUTHWEST OF HOUSTON TEXAS.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
   UPDATE (WOUS64 KWNS WOU7).
   
   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 76...
   
   DISCUSSION...A CLUSTER OF INITIALLY ELEVATED THUNDERSTORMS IN
   CENTRAL TX APPEARS TO BE EVOLVING INTO SURFACE-BASED STORMS AS THE
   LOW LEVELS MOISTEN/DESTABILIZE ACROSS SE TX.  THIS STORM CLUSTER IS
   ASSOCIATED WITH A BAND OF LOW-MID LEVEL ASCENT MOVING EWD IN ADVANCE
   OF THE MID LEVEL TROUGH OVER W TX...WHILE A REMNANT OUTFLOW BOUNDARY
   LIFTING NWD ACROSS SE TX/SW LA WILL PROVIDE A CORRIDOR FOR THE
   STORMS TO TRAVEL EWD.  THE COMBINATION OF MODERATE INSTABILITY AND
   DEEP LAYER SHEAR WILL SUPPORT BOTH SUPERCELLS AND EMBEDDED
   BOWS...WITH DAMAGING WINDS AND LARGE HAIL THE PRIMARY SEVERE THREATS
   THROUGH THE AFTERNOON.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
   MOTION VECTOR 27030.
   
   
   ...THOMPSON

   WOUS64 KWNS 271646
   WOU7
   
   BULLETIN - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 77
   NWS STORM PREDICTION CENTER NORMAN OK
   1150 AM CDT FRI MAR 27 2009
   
   SEVERE THUNDERSTORM WATCH 77 IS IN EFFECT UNTIL 500 PM CDT
   FOR THE FOLLOWING LOCATIONS
   
   TXC015-041-051-071-185-199-201-225-241-245-291-313-339-351-361-
   373-407-455-457-471-473-477-272200-
   /O.NEW.KWNS.SV.A.0077.090327T1650Z-090327T2200Z/
   
   TX 
   .    TEXAS COUNTIES INCLUDED ARE
   
   AUSTIN               BRAZOS              BURLESON            
   CHAMBERS             GRIMES              HARDIN              
   HARRIS               HOUSTON             JASPER              
   JEFFERSON            LIBERTY             MADISON             
   MONTGOMERY           NEWTON              ORANGE              
   POLK                 SAN JACINTO         TRINITY             
   TYLER                WALKER              WALLER              
   WASHINGTON           
   
   
   GMZ430-272200-
   /O.NEW.KWNS.SV.A.0077.090327T1650Z-090327T2200Z/
   
   CW 
   
   .    ADJACENT COASTAL WATERS INCLUDED ARE
   
     
   
   ATTN...WFO...HGX...LCH...
   
   
   

   SAW7 
   WW 77 SEVERE TSTM TX CW 271650Z - 272200Z
   AXIS..80 STATUTE MILES EAST AND WEST OF LINE..
   40NE UTS/HUNTSVILLE TX/ - 10SW HOU/HOUSTON TX/
   ..AVIATION COORDS.. 70NM E/W /14W LFK - 25S IAH/
   HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
   MAX TOPS TO 500. MEAN STORM MOTION VECTOR 27030.
   
   LAT...LON 31129363 29549406 29549673 31129633
   
   THIS IS AN APPROXIMATION TO THE WATCH AREA.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
   FOR WOU7.
   

Watch 77 Status Report Messages:

STATUS REPORT #2 ON WW 77

VALID 272135Z - 272240Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 SSW CLL
TO 35 NNW UTS.

..BROYLES..03/27/09

ATTN...WFO...HGX...LCH...

&&

STATUS REPORT FOR WS 77 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

TXC015-071-185-199-201-225-241-245-291-339-351-361-373-407-455-
457-471-473-272240-

TX 
.    TEXAS COUNTIES INCLUDED ARE

AUSTIN		     CHAMBERS		 GRIMES 	     
HARDIN		     HARRIS		 HOUSTON	     
JASPER		     JEFFERSON		 LIBERTY	     
MONTGOMERY	     NEWTON		 ORANGE 	     
POLK		     SAN JACINTO	 TRINITY	     
TYLER		     WALKER		 WALLER 	     
$$


GMZ430-272240-

CW 

.    ADJACENT COASTAL WATERS INCLUDED ARE



$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY.  PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$

STATUS REPORT #1 ON WW 77

VALID 271800Z - 271940Z

THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.

..SPC..03/27/09

ATTN...WFO...HGX...LCH...

&&

STATUS REPORT FOR WS 77 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

TXC015-041-051-071-185-199-201-225-241-245-291-313-339-351-361-
373-407-455-457-471-473-477-271940-

TX 
.    TEXAS COUNTIES INCLUDED ARE

AUSTIN		     BRAZOS		 BURLESON	     
CHAMBERS	     GRIMES		 HARDIN 	     
HARRIS		     HOUSTON		 JASPER 	     
JEFFERSON	     LIBERTY		 MADISON	     
MONTGOMERY	     NEWTON		 ORANGE 	     
POLK		     SAN JACINTO	 TRINITY	     
TYLER		     WALKER		 WALLER 	     
WASHINGTON	     
$$


GMZ430-271940-

CW 

.    ADJACENT COASTAL WATERS INCLUDED ARE



$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY.  PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$

Please visit the National Weather Service Interactive Weather Information Network (IWIN) for more information on the warnings.

For each watch, probabilities for particular events inside the watch (listed above in each table) are determined by the issuing forecaster. The "Low" category contains probability values ranging from less than 2% to 20% (F2-F5 tornadoes), less than 5% to 20% (all other probabilities), "Moderate" from 30% to 60%, and "High" from 70% to greater than 95%. High values are bolded and lighter in color to provide awareness of an increased threat for a particular event.