Alert archive / Texas / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 20, NWS Brownsville, TX

May 3, 20075 counties in Texas

NWS Brownsville, TX issued this severe thunderstorm warning at May 3, 2007, 12:42 AM CDT for 5 counties in Texas. It was in force for 48 min. 8 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 3, 2007, 12:42 AM CDT (05:42 UTC)
Expired: May 3, 2007, 1:30 AM CDT
In force: 48 min
Issued by: NWS Brownsville, TX
Area: Counties, with a storm outline in the text

Counties Brooks County, TX, Hidalgo County, TX, Jim Hogg County, TX, Kenedy County, TX, Starr County, TX

The radar

The Corpus Christi radar (KCRP), 148 km from the middle of the area, began a volume at 05:43 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
May 3, 1:00 AM CDT	TSTM WND DMG	1 Ese Rio Grande City, TX	STARR COUNTY SHERIFFS OFFICE REPORTED ROOF DAMAGE AND UTILITY POLES SPARKING IN OLD EL SAUZ.
May 3, 1:00 AM CDT	TSTM WND DMG	Garciasville, TX	GARCIASVILLE POST OFFICE REPORTED LARGE TREE LIMBS BLOCKING ROAD.
May 3, 1:00 AM CDT	TSTM WND DMG	Rio Grande City, TX	STORE SIGN BLOWN OVER AND UTILITY POLES ON AUTOMOBILES AT RAMIREZ FORD DEALERSHIP.
May 3, 1:00 AM CDT	HAIL 0.5	5 N Rio Grande City, TX	MARBLE SIZE HAIL REPORTED NORTH OF RIO GRANDE CITY.
May 3, 1:00 AM CDT	HAIL 0.88	Mccook, TX	CO-OP OBSERVER IN MCCOOK REPORTED HAIL RANGING FROM PEA TO NICKEL SIZE.
May 3, 1:00 AM CDT	HAIL 1	Garciasville, TX	GARCIASVILLE POST OFFICE REPORTED QUARTER SIZE HAIL.
May 3, 1:00 AM CDT	HAIL 1.75	5 Wnw Sullivan City, TX	ESTIMATED GOLF BALL SIZE HAIL AND LARGER IN LA GRULLA, STARR COUNTY.
May 3, 1:15 AM CDT	HAIL 0.88	5 E Garciasville, TX	STORM SPOTTER REPORTED NICKEL SIZE HAIL IN LA GRULLA

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 5 storm reports to this severe thunderstorm warning; the first came 18 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 2, 10:48 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 5.7 hours before the alert went out and 156 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1528 J/kg
Mixed-layer CIN: -306 J/kg
Mixed-layer LCL: 1292 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 156 m²/s²
0-3 km storm-relative helicity: 179 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS54 KBRO 030542
SVRBRO
TXC047-215-247-261-427-030630-
/O.NEW.KBRO.SV.W.0020.070503T0542Z-070503T0630Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1242 AM CDT THU MAY 3 2007

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BROOKS COUNTY IN DEEP SOUTH TEXAS...
  NORTHWESTERN HIDALGO COUNTY IN DEEP SOUTH TEXAS...
  THIS INCLUDES THE CITY OF MCCOOK...
  SOUTHEASTERN JIM HOGG COUNTY IN DEEP SOUTH TEXAS...
  NORTHWESTERN KENEDY COUNTY IN DEEP SOUTH TEXAS...
  THIS INCLUDES THE CITY OF SARITA...
  STARR COUNTY IN DEEP SOUTH TEXAS...
  THIS INCLUDES THE CITIES OF...ROMA...RIO GRANDE CITY...FALCON
  DAM...EL SAUZ...

* UNTIL 130 AM CDT

* AT 1238 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING NICKEL SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 12 MILES NORTH OF ENCINO TO    
  ROMA AND MOVING SOUTHEAST AT 30 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  ENCINO BY 1255 AM CDT...
  GARCIASVILLE BY 100 AM CDT...
  SULLIVAN CITY AND MCCOOK BY 115 AM CDT...
  PENITAS AND LA JOYA BY 125 AM CDT...

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 AM CDT THURSDAY MORNING
FOR CENTRAL TEXAS.

LAT...LON 2730 9849 2667 9901 2649 9928 2609 9848
      2726 9769

$$

KL

2 follow-up statements

000 
WWUS54 KBRO 030610
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
111 AM CDT THU MAY 3 2007

TXC047-215-247-261-427-030630-
/O.CON.KBRO.SV.W.0020.000000T0000Z-070503T0630Z/
JIM HOGG TX-BROOKS TX-STARR TX-HIDALGO TX-KENEDY TX-
111 AM CDT THU MAY 3 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 AM CDT
FOR NORTHWESTERN KENEDY...NORTHWESTERN HIDALGO...STARR...BROOKS AND
SOUTHEASTERN JIM HOGG COUNTIES...

AT 108 AM 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 WAS
LOCATED NEAR LA GLORIA...OR ABOUT 18 MILES NORTHWEST OF MCCOOK...
MOVING SOUTHEAST AT 10 MPH.

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 AM CDT THURSDAY MORNING
FOR CENTRAL TEXAS.

LAT...LON 2730 9849 2667 9901 2649 9928 2609 9848
      2726 9769

$$

KL

000 
WWUS54 KBRO 030612 CCA
SVSBRO

SEVERE WEATHER STATEMENT...CORRECTED SPEED OF MOVEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
111 AM CDT THU MAY 3 2007

TXC047-215-247-261-427-030630-
/O.CON.KBRO.SV.W.0020.000000T0000Z-070503T0630Z/
JIM HOGG TX-BROOKS TX-STARR TX-HIDALGO TX-KENEDY TX-
111 AM CDT THU MAY 3 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 AM CDT
FOR NORTHWESTERN KENEDY...NORTHWESTERN HIDALGO...STARR...BROOKS AND
SOUTHEASTERN JIM HOGG COUNTIES...

AT 108 AM 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 WAS
LOCATED NEAR LA GLORIA...OR ABOUT 18 MILES NORTHWEST OF MCCOOK...
MOVING SOUTHEAST AT 30 MPH.

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 AM CDT THURSDAY MORNING
FOR CENTRAL TEXAS.

LAT...LON 2730 9849 2667 9901 2649 9928 2609 9848
      2726 9769

$$

KL

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Brownsville, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at May 2, 8:10 PM CDT, 4 hours 32 minutes earlier.

Area forecast discussion, May 2, 8:10 PM CDT, 4 hours 32 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BROWNSVILLE TX
810 PM CDT WED MAY 2 2007

.DISCUSSION...
THUNDERSTORMS LIKELY TO CLIP NORTHWEST COUNTIES ALTHOUGH SEVERE
ACTIVITY MAY HAVE DISSIPATED BY THEN. EXPECT BUILDING MCS TO MOVE
ACROSS NORTHERN AREAS IN THE OVERNIGHT HOURS REACHING THE COAST
BEFORE MORNING AND USHERING IN A MORE STABLE ENVIRONMENT BY
DAYBREAK. HAVE UPDATED OVERNIGHT PERIODS TO REFLECT HIGHER POPS
AND TSTMS OTHERWISE CURRENT FORECAST ON TRACK. SPS FOR SEVERE
POTENTIAL NORTHWEST COMING SHORTLY.

&&

.AVIATION...
THE MARINE LAYER SHOULD ADVANCE WEST OVERNIGHT WITH MVFR
CEILING DEVELOPING AFTER MIDNIGHT. MVFR CONDITIONS SHOULD PREVAIL
THROUGH MID MORNING WITH VFR AND TEMPO MVFR CEILINGS ANTICIPATED
THROUGH THURSDAY AFTERNOON. A FEW STRONG THUNDERSTORMS COULD MOVE
THROUGH THE WESTERN PORTIONS OF DEEP SOUTH TEXAS BETWEEN 9 PM AND
MIDNIGHT AND THEN POSSIBLY MOVE INTO THE UPPER AND LOWER RIO GRANDE
VALLEY AFTER MIDNIGHT.

&&

.MARINE...
THE PRESSURE GRADIENT REMAINS MODERATELY STRONG ALONG THE
LOWER TEXAS COAST BUT WINDS HAVE LOWERED BELOW SMALL CRAFT ADVISORY
CRITERIA. WILL MAINTAIN EXERCISE CAUTION WORDING FOR ALL MARINE
WATERS THROUGH THE EVENING AND OVERNIGHT AS THE UPPER LOW PRESSURE
TROUGH OVER WEST TEXAS ADVANCES EAST. A FEW THUNDERSTORMS COULD MOVE
INTO THE NORTHERN PORTIONS OF THE LAGUNA MADRE AND THE COASTAL
WATERS AFTER MIDNIGHT. SOME STORMS MAY PRODUCE WINDS IN EXCESS OF 35
KNOTS. A MODERATE ONSHORE FLOW WILL PERSIST THURSDAY THROUGH
SATURDAY WITH AN INCREASE SUNDAY AND MONDAY AS THE NEXT UPPER
THROUGH APPROACHES THE SOUTHERN PLAINS. SMALL CRAFT ADVISORIES WILL
LIKELY BE NEEDED DURING THE LATTER HALF OF THE WEEKEND AND EARLY
NEXT WEEK.

&&

.PREV DISCUSSION... /ISSUED 703 PM CDT WED MAY 2 2007/

MARINE DISCUSSION UPDATE...LOWERED THE SCA FOR THE LAGUNA. WINDS
OFFSHORE REMAIN BELOW CRITERIA BUT WILL CONTINUE TO MONITOR.

PREV DISCUSSION...ISSUED 202 PM CDT WED MAY 2 2007...STORM
PREDICTION CENTER HAS PLACED WESTERN AND CENTRAL PORTIONS OF BRO
CWFA IN SLIGHT RISK OF SEVERE WEATHER THROUGH 12Z THURSDAY
MORNING. THUS...ZAPATA...JIM HOGG...STARR ..AND BROOKS COUNTY WILL
HAVE MENTION OF SEVERE WEATHER IN UPCOMING ZONE FORECAST PACKAGE.
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS...NOT SEVERE...EXPECTED
FOR THE REMAINDER OF TOMORROW AS MID-LEVEL LOW PRESSURE SYSTEM
PUSHES FARTHER EAST. DRY WEATHER WILL THEN PREVAIL FRIDAY THROUGH
EARLY NEXT WEEK AS ATMOSPHERE GENERALLY REMAINS TOO DRY TO
INTERACT WITH A SERIES OF MID-LEVEL DISTURBANCES THAT WILL PASS
OVER DEEP SOUTH TEXAS ON A SOUTHWEST-TO-NORTHEAST FLOW. ALTHOUGH
SIGNIFICANT CLOUDINESS IS FORECAST...ABOVE NORMAL TEMPERATURES ARE
EXPECTED THROUGH THE NEXT SEVERAL DAYS.

AVIATION...DAYTIME HEATING AND INCREASED LOW LEVEL MIXING HAS
IMPROVED CEILINGS TODAY. EXPECT GENERAL VFR/MVFR TO PREVAIL LATER
THIS AFTERNOON AND EVENING WITH LOW MORNING SC DECKS EXPECTED TO
RETURN EARLY THURS MORNING LOWERING CEILINGS ONCE AGAIN. THE SAME
PATTERN WILL LIKELY REPEAT TOMORROW WITH CEILINGS IMPROVING AFTER
SUNRISE. THIS OVERALL TREND IS REFLECTED PRETTY WELL IN THE CURRENT
TAF WORDING.

&&

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

THIS PRODUCT IS ALSO AVAILABLE ON OUR INTERNET WEB PAGE AT:
HTTP://WWW.SRH.NOAA.GOV/BRO

59/51/64/ABBOTT

Hazardous weather outlook, May 2, 11:13 PM CDT, 1 hour 29 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1113 PM CDT WED MAY 2 2007

TXZ248>257-031200-
ZAPATA-JIM HOGG-BROOKS-KENEDY-STARR-HIDALGO-INLAND WILLACY-
INLAND CAMERON-COASTAL WILLACY-COASTAL CAMERON-
1113 PM CDT WED MAY 2 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR DEEP SOUTH TEXAS.

.DAY ONE...TONIGHT

THERE IS A RISK OF SEVERE WEATHER TONIGHT FOR ALL OF DEEP SOUTH
TEXAS. A TORNADO WATCH IS IN EFFECT FOR ALL OF DEEP SOUTH TEXAS
UNTIL 6AM. A LINE OF STRONG TO SEVERE THUNDERSTORMS IS EXPECTED
TO MOVE THROUGH THE REGION OVERNIGHT BRING THE THREAT FOR LARGE
HAIL...DAMAGING WINDS...AND ISOLATED TORNADOES. STORMS WILL ALSO
BRING STRONG WINDS AND FREQUENT LIGHTNING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

SMALL CRAFT ADVISORIES AND A MODERATE RISK OF RIP CURRENTS WILL BE
POSSIBLE SUNDAY AND MONDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE REQUESTED TO REMAIN ALERT FOR SEVERE WEATHER AND
SHOULD REPORT ANY SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE.

64

In the hours before

Special weather statement, May 2, 10:06 PM CDT, 2 hours 36 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1006 PM CDT WED MAY 2 2007

TXZ248>254-030400-
INLAND WILLACY TX-JIM HOGG TX-ZAPATA TX-BROOKS TX-STARR TX-HIDALGO
TX-KENEDY TX-
1006 PM CDT WED MAY 2 2007

...A LINE OF SEVERE THUNDERSTORMS IS MOVING TOWARD THE WESTERN
PORTIONS OF DEEP SOUTH TEXAS FROM ADJACENT MEXICO...

...LARGE HAIL AND DAMAGING WINDS ARE POSSIBLE FOR WESTERN PORTIONS
OF DEEP SOUTH TEXAS DURING THE NEXT TWO HOURS...

A MOIST AND UNSTABLE ATMOSPHERE REMAINS IN PLACE OVER THE RIO GRANDE
VALLEY TONIGHT. AN UPPER LEVEL DISTURBANCE CURRENTLY TO OUR
NORTHWEST WILL SLOWLY MOVE EAST OVERNIGHT...BRINGING SEVERE
THUNDERSTORMS...WITH LARGE HAIL AND DAMAGING WINDS TO WESTERN
PORTIONS OF THE RIO GRANDE VALLEY...INCLUDING ZAPATA AND JIM HOGG
COUNTIES INITIALLY. TORNADOES MAY ALSO DEVELOP IN THIS ENVIRONMENT.
IT IS STILL UNCERTAIN WHETHER THIS DANGEROUS CONVECTION WILL DEVELOP
FURTHER SOUTH...AND RESIDENTS OF DEEP SOUTH TEXAS SHOULD REMAIN
ALERT FOR THE POSSIBILITY OF SEVERE WEATHER OVERNIGHT. A TORNADO
WATCH IS CURRENTLY IN EFFECT JUST NORTHWEST OF THE RIO GRANDE VALLEY
UNTIL 1 AM CDT.

CONTINUE TO MONITOR NOAA WEATHER RADIO...COMMERCIAL RADIO AND
TELEVISION OR YOUR LOCAL CABLE OUTLET FOR ANY ISSUANCE OF WARNING
FROM THE NATIONAL WEATHER SERVICE IN BROWNSVILLE. PHILO

PHILO

Local storm report, May 2, 11:41 PM CDT, 1 hour 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1141 PM CDT WED MAY 02 2007

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

1135 PM     HAIL             6 S SAN YGNACIO         26.95N 99.45W
05/02/2007  E0.75 INCH       XXX                XX   LAW ENFORCEMENT

            ZAPATA COUNTY SHERIFF REPORTED DIME TO PENNY SIZED HAIL 6
            MILES SOUTH OF SAN YGNACIO

&&

JSTRAUB

Local storm report, May 2, 11:49 PM CDT, 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1149 PM CDT WED MAY 02 2007

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

1140 PM     HAIL             ZAPATA                  26.89N 99.26W
05/02/2007  E0.50 INCH       ZAPATA             TX   TRAINED SPOTTER

            TRAINED SPOTTER REPORTED DIME SIZE HAIL IN CITY OF ZAPATA

&&

JSTRAUB

The office that day

Everything else NWS Brownsville, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 2, 10:44 PM CDT	Severe Thunderstorm Warning	BRO	Zapata	61 min
May 2, 11:39 PM CDT	Severe Thunderstorm Warning	BRO	Jim Hogg, Starr, Zapata	66 min
May 3, 1:09 AM CDT	Marine Weather Statement	BRO		4 hr
May 3, 1:28 AM CDT	Severe Thunderstorm Warning	BRO	Hidalgo, Starr, Willacy	32 min
May 3, 1:55 AM CDT	Severe Thunderstorm Warning	BRO	Cameron, Hidalgo, Kenedy, Willacy	35 min
May 3, 2:04 AM CDT	Special Marine Warning	BRO		56 min
May 3, 2:12 AM CDT	Special Marine Warning	BRO		63 min
May 3, 2:24 AM CDT	Severe Thunderstorm Warning	BRO	Cameron, Kenedy, Willacy	21 min
May 3, 2:48 AM CDT	Severe Thunderstorm Warning	BRO	Cameron, Hidalgo	27 min
May 3, 3:04 AM CDT	Special Marine Warning	BRO		86 min

Nearby

Severe Thunderstorm Warnings in Texas, 2007 Every severe thunderstorm warning in 2007

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.