Severe Thunderstorm Warning 6, NWS Brownsville, TX

000 
WWUS54 KBRO 270127
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
826 PM CDT MON MAR 26 2007

TXC427-505-270200-
/O.CON.KBRO.SV.W.0006.000000T0000Z-070327T0200Z/
ZAPATA TX-STARR TX-
826 PM CDT MON MAR 26 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR WEST CENTRAL STARR AND SOUTH CENTRAL ZAPATA COUNTIES...

AT 826 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE 
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM IS PASSING 
OVER HIGHWAY 83 IN SOUTHERN ZAPATA COUNTY...ABOUT 10 MILES SOUTH OF 
ZAPATA...MOVING EAST AT 15 MPH.

THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS
OF THE INDICATED COUNTIES.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

LAT...LON 2681 9950 2653 9925 2635 9905 2689 9901

$$

PHILO

000 
WWUS54 KBRO 270204
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
901 PM CDT MON MAR 26 2007

TXC427-505-270220-
/O.EXP.KBRO.SV.W.0006.000000T0000Z-070327T0200Z/
ZAPATA TX-STARR TX-
901 PM CDT MON MAR 26 2007

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL STARR AND SOUTH
CENTRAL ZAPATA COUNTIES EXPIRED AT 900 PM CDT...

NATIONAL WEATHER SERVICE RADAR SHOWED THE SEVERE THUNDERSTORMS OVER
SOUTHERN ZAPATA COUNTY HAVE MOVED EAST NOW. THESE THUNDERSTORMS 
CREATED WIND DAMAGE AND NICKEL SIZE HAIL IN SOUTHERN ZAPATA COUNTY.

THE THREAT FOR SEVERE THUNDERSTORMS IN SOUTHERN ZAPATA COUNTY IS 
OVER NOW...WITH FLOODING THE MAIN CONCERN. DRIVE WITH CARE IN THIS 
LOCATION TONIGHT.

LAT...LON 2681 9950 2653 9925 2635 9905 2689 9901

$$

PHILO

AREA FORECAST DISCUSSION...CORRECTED FOR TYPO
NATIONAL WEATHER SERVICE BROWNSVILLE TX
751 PM CDT MON MAR 26 2007

.DISCUSSION...WATER VAPOR LOOP SHOWS THAT THE UPPER-LEVEL LOW
RESPONSIBLE FOR SEVERE WEATHER OVER MUCH OF SOUTH TEXAS TODAY IS NOW
CROSSING FROM MEXICO INTO SOUTH CENTRAL TEXAS.  THE RISK OF SEVERE
THUNDERSTORMS OVER THE NORTHWEST COUNTIES WILL CONTINUE FOR THE NEXT
HOUR OR TWO WITH LARGE HAIL AND STRONG WINDS BEING THE PRIMARY
THREATS. 00Z LAPS ANALYSIS OVER ZAPATA COUNTY INDICATES SBCAPE
VALUES AROUND 2000 J/KG AND A 0-6KM BULK SHEAR AROUND 55 KTS WHILE
INSTABILITY AND SHEAR VALUES DECREASE STEADILY TOWARD THE EAST.  THE
RISK OF SEVERE WEATHER IS EXPECTED TO DECREASE OVER THE CWA LATER
TONIGHT AS THE LOSS OF DAYTIME HEATING REDUCES INSTABILITY.  IN
ADDITION...AS THE UPPER LOW LIFTS NORTHEAST OVERNIGHT...UPPER WINDS
WILL WEAKEN...MAKING SHEAR VECTORS LESS FAVORABLE FOR SEVERE
WEATHER.  HAVE UPDATED ZONES TO REDUCE POPS OVER MUCH OF THE CWA.
LEFT CHANCE POPS OVER NORTHWESTERN COUNTIES AS CONVECTION IS
ON-GOING AND HIGHER INSTABILITY IS EXPECTED TO PERSIST OVER THAT
AREA THIS EVENING.
&&

.MARINE...SMALL CRAFT ADVISORY FLAGS HAVE BEEN LOWERED FOR THE LAGUNA
MADRE AS LOCAL OBS SHOW SOUTHERLY WINDS HAVE DECREASED TO 10 TO 15
KNOTS. WINDS WILL CONTINUE TO BE BRISK THROUGH THE REST OF THE WEEK
WITH STRONG RIDGING ACROSS THE GULF. SEAS WILL REMAIN 4 TO 6 FEET
OFFSHORE. WINDS ARE EXPECTED TO SHIFT TO THE NORTHWEST ON FRIDAY AS
A FRONTAL BOUNDARY SWEEPS THROUGH. WINDS BEHIND THE FRONT MAY REACH
20 KNOTS MAINLY FRIDAY NIGHT.
&&

.AVIATION...LOWER CU FIELDS REMAIN IN THE VLY AT MID EVENING...WITH
BRO BKN025...SCT025 AT HRL AND MFE. WINDS WILL REMAIN GUSTY FROM THE
SOUTH AT 20 TO 25 KNOTS WITH GUSTS TO 30KTS. SOME STRONG
THUNDERSTORMS MAY PUSH INTO THE REGION DURING THE EVENING...WITH
MAINLY GUSTY WINDS AND BRIEF DOWNPOURS. THIS WILL MORE LIKELY HAMPER
FLIGHT CORRIDORS TO THE NORTH THROUGH THE NIGHT.
&&

.BRO WATCHES/WARNINGS/ADVISORIES...NONE.
&&

SYNOPTIC/GRIDS....68/KL
MARINE/AVIATION...58/JP
HMT/MESOSCALE.....MARTINEZ

THIS PRODUCT IS ALSO AVAILABLE ON OUR WEB SITE AT:
HTTP://WWW.WEATHER.GOV/BROWNSVILLE

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE BROWNSVILLE TX
330 PM CDT MON MAR 26 2007

TXZ248>257-271200-
ZAPATA-JIM HOGG-BROOKS-KENEDY-STARR-HIDALGO-INLAND WILLACY-
INLAND CAMERON-COASTAL WILLACY-COASTAL CAMERON-
330 PM CDT MON MAR 26 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR DEEP SOUTH TEXAS.

.DAY ONE...REMAINDER OF TONIGHT.

A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR AREAS JUST NORTH OF
THE RIO GRANDE VALLEY UNTIL 10 PM CDT. SOME THUNDERSTORMS MAY CLIP
ZAPATA COUNTY ON THEIR WAY NORTHEAST INTO CENTRAL TEXAS...MAINLY
BEFORE 6 PM CDT. SOME OF THESE THUNDERSTORMS HAVE THE POTENTIAL TO
BE SEVERE...PRODUCING HAIL...STRONG WINDS...AND ISOLATED TORNADOES.
ALSO...A SMALL CRAFT ADVISORY IS IN EFFECT FOR THE LAGUNA MADRE
THROUGH 10 PM CDT DUE TO STRONG SOUTHEAST WINDS. A MODERATE RISK OF
RIP CURRENTS AT THE BEACHES OF SOUTH PADRE ISLAND AND BOCA CHICA
WILL ACCOMPANY THE STRONG WINDS. NO OTHER HAZARDOUS WEATHER IS
EXPECTED.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

THE SMALL CRAFT ADVISORY MAY NEED TO BE ISSUED FOR THE LAGUNA MADRE
TUESDAY THROUGH THURSDAY AS STRONG WINDS AGAIN DEVELOP. A MODERATE
TO HIGH RISK OF RIP CURRENTS AT THE LOCAL BEACHES WILL LIKELY
ACCOMPANY THESE STRONG WINDS. AND...A LATE SEASON COLD FRONT MAY
PASS THROUGH DEEP SOUTH TEXAS ON FRIDAY...BRINGING SHOWERS AND
THUNDERSTORMS AND POSSIBLE SMALL CRAFT ADVISORY WINDS AND SEAS FOR
THE ADJACENT COASTAL WATERS OF DEEP SOUTH TEXAS THAT DAY AND NIGHT.
NO OTHER HAZARDOUS WEATHER IS ANTICIPATED THROUGH THE PERIOD.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTERS SHOULD REPORT ANY OCCURRENCES OF HAIL...STRONG
WINDS...TORNADOES...OR STORM DAMAGE TO THE NATIONAL WEATHER SERVICE
OFFICE IN BROWNSVILLE TODAY THROUGH TONIGHT.

PHILO

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
255 PM CDT MON MAR 26 2007

TXZ248-262100-
ZAPATA TX-
255 PM CDT MON MAR 26 2007

...A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR AREAS JUST NORTH
OF THE RIO GRANDE VALLEY...

...SOME STRONG THUNDERSTORMS MAY CLIP ZAPATA COUNTY IN THE NEXT TWO
HOURS...

THE STORMS PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH
FOR AREAS JUST NORTH OF THE RIO GRANDE VALLEY UNTIL 10 PM CDT. SOME
THUNDERSTORMS HAVE DEVELOPED AS FAR SOUTH AS OLD MEXICO ADJACENT TO
ZAPATA COUNTY. GENERAL MOVEMENT OF THESE THUNDERSTORMS IS NORTHEAST
AT 20 MPH...AND SOME OF THE THUNDERSTORMS NOW WEST OF ZAPATA COUNTY
MAY CLIP THE COUNTY ON THE WAY NORTHEAST INTO CENTRAL TEXAS.

PEA SIZE HAIL AND WIND GUSTS TO 50 MPH MAY BE EXPERIENCED IN ZAPATA
COUNTY IF THESE THUNDERSTORMS JOG MORE EAST.

THE UPPER LOW CAUSING THE CONVECTION IS CURRENTLY LOCATED OVER THE
TEXAS BIG BEND AND IS STARTING TO LIFT MORE NORTHEAST...AWAY FROM
OUR REGION.

PHILO

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
513 PM CDT MON MAR 26 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0415 PM     HAIL             4 N SAN YGNACIO         27.09N 99.45W
03/26/2007  E0.88 INCH       ZAPATA             TX   EMERGENCY MNGR

&&

SPEECE