Severe Thunderstorm Warning 101, NWS Houston/Galveston, TX

000 
WWUS54 KHGX 242226
SVSHGX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
525 PM CDT THU MAY 24 2007

TXC455-242235-
/O.CAN.KHGX.SV.W.0101.000000T0000Z-070524T2245Z/
TRINITY TX-
525 PM CDT THU MAY 24 2007

...THE SEVERE THUNDERSTORM WARNING FOR TRINITY COUNTY HAS BEEN 
CANCELLED...

THE THUNDERSTORM WHICH PROMPTED THE SEVERE THUNDERSTORM WARNING HAS
WEAKENED AND IS NO LONGER EXPECTED TO POSE AN IMMEDIATE THREAT TO
LIFE OR PROPERTY.

A FEW STRONG THUNDERSTORMS SOUTHWEST OF PENNINGTON AND ALSO WEST OF 
GROVETON WILL WILL CONTINUE TO DRIFT NORTHWEST AT 5 TO 10 MPH. 
RAINFALL RATES OF AROUND ONE AND ONE AND HALF INCHES WILL ACCOMPANY 
THESE STORMS.

PLEASE REPORT SEVERE WEATHER TO THE COUNTY SHERIFF...LOCAL POLICE...
OR DEPARTMENT OF PUBLIC SAFETY. THEY WILL RELAY YOUR REPORT TO THE
NATIONAL WEATHER SERVICE.

LAT...LON 3085 9521 3110 9489 3132 9501 3104 9543

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
357 PM CDT THU MAY 24 2007

.MARINE...
WINDS ACROSS THE BAYS AND 20-60 NM WATERS HAVE MAINTAINED CAUTION
CRITERIA THROUGH TODAY. WINDS OVER THE 00-20 NM WATERS ARE
SLIGHTLY BELOW CAUTION LEVELS. THUS WILL CARRY CAUTION FLAGS FOR
THE BAYS AND 20-60 NM WATERS THROUGH MIDNIGHT...CAUTION FLAGS FOR
THE 00-60 NM GULF WATERS THROUGH SUNRISE IN ANTICIPATION OF
NEARSHORE WINDS PICKING UP WITH TIGHTENING NOCTURNAL LAND-SEA
GRADIENT. SEA HEIGHTS ARE EXPECTED TO REMAIN UNDER ADVISORY
CRITERIA. THE EXCEPTION WILL BE NEAR 7 FOOT SEAS ACROSS PORTIONS
OF THE 20-60 NM WATERS ON LATE FRIDAY...EARLY SATURDAY. DECENT
EASTERLY FETCH WILL GENERATE AN AMPLE SWELL FORECASTED TO DRIVE
FAR OFFSHORE WAVE HEIGHTS UP A FOOT OR SO AROUND MIDNIGHT. 31

&&

.PREV DISCUSSION... /ISSUED 335 PM CDT THU MAY 24 2007/

DISCUSSION...
THE SLOW PATTERN CHANGE WILL CONTINUE AS THE MID AND UPPER TROUGH
MOVES OVER TEXAS LATE THIS WEEKEND AND INTO EARLY NEXT WEEK.
CURRENTLY THE SURFACE RIDGE OVER SE TX WAS HELPING TO KEEP A BIT
DRIER AIR IN PLACE...ALTHOUGH THE CONVECTION WAS FIRING UP OVER
THE NORTHERN HALF OF THE FORECAST AREA. THE MORNING SOUNDINGS
INDICATED THAT AN ISOLATED SEVERE STORM WAS NOT OUT OF THE
QUESTION. THE VIL OF THE DAY WAS ABOUT 60 AND SO FAR THIS
AFTERNOON SOME STRONG STORMS HAVE DEVELOPED EAST OF POLK COUNTY.
EXPECT THE RAIN COVERAGE AND STORM STRENGTH TO WEAKEN CONSIDERABLY
TOWARD SUNSET. WILL REISSUE A HAZARDOUS WEATHER OUTLOOK CONCERNING
THESE STORMS.

OVER THE NEXT COUPLE OF DAYS THE MODELS ARE BUILDING THE RIDGE
SLIGHTLY MORE INTO SE TX. THIS WILL MEAN DRIER AIR AND LIKELY LESS
CHANCES OF RAIN. THE GFS AND ECMWF WERE SLOWER BY ABOUT A DAY IN
BRINGING THE UPPER TROUGH INTO THE AREA EARLY NEXT WEEK. STILL
THINK MEMORIAL DAY WILL SEE BETTER CHANCES OF RAIN THAN SUNDAY.
NOW IT LOOKS LIKE TUESDAY AND WEDNESDAY WILL SEE THE BEST CHANCES.
THE ENSEMBLE 500 MB FORECAST INDICATED STILL A BIT OF UNCERTAINTY
AND WILL NOT UP POPS ANY HIGHER AT THIS TIME FOR TUESDAY AND
WEDNESDAY.

&&

.PRELIMINARY POINT TEMPS/POPS...
COLLEGE STATION (CLL)      70  84  66  85  64 /  30  40  30  20  20
HOUSTON (IAH)              71  85  68  86  67 /  20  30  20  20  10
GALVESTON (GLS)            75  84  74  83  74 /  20  20  20  10  10

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...NONE.
GM...SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL 1 AM CDT FRIDAY FOR
     THE FOLLOWING ZONES: GALVESTON BAY...MATAGORDA BAY.

     SMALL CRAFT SHOULD EXERCISE CAUTION FROM 1 AM CDT FRIDAY THROUGH
     FRIDAY MORNING FOR THE FOLLOWING ZONES: WATERS FROM
     FREEPORT TO THE MATAGORDA SHIP CHANNEL OUT 20 NM...WATERS
     FROM HIGH ISLAND TO FREEPORT OUT 20 NM.

     SMALL CRAFT SHOULD EXERCISE CAUTION THROUGH FRIDAY MORNING FOR
     THE FOLLOWING ZONES: WATERS FROM FREEPORT TO THE MATAGORDA
     SHIP CHANNEL 20 NM TO 60 NM...WATERS FROM HIGH ISLAND TO
     FREEPORT 20 TO 60 NM.

&&

DISCUSSION...40
AVIATION/MARINE...31

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
344 PM CDT THU MAY 24 2007

GMZ330-335-350-355-370-375-TXZ163-164-176>179-195>200-210>214-226-
227-235>238-251200-
AUSTIN-BRAZORIA-BRAZOS-BURLESON-CHAMBERS-COLORADO-FORT BEND-
GALVESTON-GALVESTON BAY-GRIMES-HARRIS-HOUSTON-JACKSON-LIBERTY-
MADISON-MATAGORDA-MATAGORDA BAY-MONTGOMERY-POLK-SAN JACINTO-
TRINITY-WALKER-WALLER-WASHINGTON-
WATERS FROM FREEPORT TO THE MATAGORDA SHIP CHANNEL 20 NM TO 60 NM-
WATERS FROM FREEPORT TO THE MATAGORDA SHIP CHANNEL OUT 20 NM-
WATERS FROM HIGH ISLAND TO FREEPORT 20 TO 60 NM-
WATERS FROM HIGH ISLAND TO FREEPORT OUT 20 NM-WHARTON-
344 PM CDT THU MAY 24 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT

SCATTERED THUNDERSTORMS WILL DEVELOP NORTH OF THE INTERSTATE 10
CORRIDOR THIS AFTERNOON. ISOLALTED STRONG STORMS WILL BE POSSIBLE
AND THERE IS AN OUTSIDE CHANCE FOR A SEVERE STORM PRODUCING LARGE
HAIL AND DAMAGING WIND GUSTS. THE COVERAGE AND STRENGTH OF THE
STORMS WILL DIMINISH AROUND AND AFTER SUNSET.

.DAYS TWO THROUGH FOUR...FRIDAY THROUGH SUNDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS FIVE THROUGH SEVEN...MONDAY THROUGH WEDNESDAY

SCATTERED THUNDERSTORMS WILL AFFECT SOUTHEAST TEXAS MAINLY EACH
AFTERNOON AND EVENING AS AN UPPER LOW MOVES ACROSS THE STATE. AT
THIS TIME NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED.