Alert archive / Texas / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 14, NWS Brownsville, TX
NWS Brownsville, TX issued this severe thunderstorm warning at Apr 30, 2007, 9:25 PM CDT for Starr County, Zapata County, Texas. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Apr 30, 2007, 9:25 PM CDT (02:25 UTC)
- Expired
- Apr 30, 2007, 9:53 PM CDT
- In force
- 28 min
- Issued by
- NWS Brownsville, TX
- Area
- Counties, with a storm outline in the text
Counties Starr County, TX, Zapata County, TX
The radar
The Brownsville radar (KBRO), 193 km from the middle of the area, began a volume at 02:24 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
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 nearest sounding before it
Brownsville Intl, TX (KBRO), launched 00:00Z, 2.4 hours before the alert went out and 196 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.
- Mixed-layer CAPE
- 1999 J/kg
- Mixed-layer CIN
- -52 J/kg
- Mixed-layer LCL
- 864 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 108 m²/s²
- 0-3 km storm-relative helicity
- 130 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 4.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KBRO 010225 SVRBRO TXC427-505-010315- /O.NEW.KBRO.SV.W.0014.070501T0225Z-070501T0315Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BROWNSVILLE TX 925 PM CDT MON APR 30 2007 THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WEST CENTRAL STARR COUNTY IN DEEP SOUTH TEXAS... THIS INCLUDES THE CITY OF FALCON DAM... EXTREME SOUTH CENTRAL ZAPATA COUNTY IN DEEP SOUTH TEXAS... * UNTIL 1015 PM CDT * AT 918 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 9 MILES SOUTHWEST OF FALCON DAM...AND MOVING NORTHEAST AT 10 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... FALCON DAM BY 1015 PM CDT... DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM. WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. THIS STORM HAS THE POTENTIAL TO CAUSE SERIOUS INJURY AND SIGNIFICANT DAMAGE TO PROPERTY. LAT...LON 2651 9938 2636 9928 2647 9901 2668 9915 $$ PHILO
2 follow-up statements
000 WWUS54 KBRO 010235 SVSBRO SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE BROWNSVILLE TX 935 PM CDT MON APR 30 2007 TXC427-505-010315- /O.CON.KBRO.SV.W.0014.000000T0000Z-070501T0315Z/ ZAPATA TX-STARR TX- 935 PM CDT MON APR 30 2007 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT FOR WEST CENTRAL STARR AND EXTREME SOUTH CENTRAL ZAPATA COUNTIES... AT 927 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 8 MILES SOUTHWEST OF FALCON DAM...MOVING NORTHEAST AT 10 MPH. THE SEVERE THUNDERSTORM WILL BE NEAR... FALCON DAM BY 950 PM CDT... THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. LAT...LON 2651 9938 2636 9928 2647 9901 2668 9915 $$ PHILO
000 WWUS54 KBRO 010253 SVSBRO SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE BROWNSVILLE TX 949 PM CDT MON APR 30 2007 TXC427-505-010259- /O.CAN.KBRO.SV.W.0014.000000T0000Z-070501T0315Z/ ZAPATA TX-STARR TX- 949 PM CDT MON APR 30 2007 ...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL STARR NEAR FALCON DAM AND EXTREME SOUTH CENTRAL ZAPATA COUNTIES IS CANCELLED... THIS SEVERE THUNDERSTORM HAS NOW MOVED EAST OF THE WARNED AREA ALONG THE STARR AND ZAPATA COUNTY LINE...WHERE A NEW WARNING HAS BEEN ISSUED. LAT...LON 2651 9938 2636 9928 2647 9901 2668 9915 $$ PHILO
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 Apr 30, 7:31 PM CDT, 1 hour 54 minutes earlier.
Area forecast discussion, Apr 30, 7:31 PM CDT, 1 hour 54 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BROWNSVILLE TX 731 PM CDT MON APR 30 2007 .DISCUSSION...A TORNADO WATCH REMAINS IN EFFECT FOR AREAS JUST NORTH OF THE RIO GRANDE VALLEY UNTIL 10 PM. SEVERE TORNADIC THUNDERSTORMS HAVE PERSISTED IN NORTHERN AND CENTRAL DUVAL COUNTY EARLY THIS EVENING...AND THESE DANGEROUS THUNDERSTORMS HAVE BEEN DRIFTING SLOWLY SOUTH TOWARD NORTHERN JIM HOGG AND ZAPATA COUNTIES. THE ATMOSPHERE REMAINS VERY SUPPORTIVE FOR THE PERSISTENCE OF THESE THUNDERSTORMS. LIFT AND INFLOW ALONG THE OUTFLOW BOUNDARIES ASSOCIATED WITH THE THUNDERSTORM DEVELOPMENT SHOULD LEAD TO RENEWED UPDRAFT AND MIGRATION TO PORTIONS OF THE UPPER RIO GRANDE VALLEY. IN ADDITION TO THE TORNADO THREAT FROM THESE STORMS...VERY LARGE HAIL AND EXTREME RAINFALL TOTALS ARE ALSO POSSIBLE. AT THIS TIME...THE THUNDERSTORMS REMAIN ABOUT 30 MILES NORTH OF ZAPATA AND JIM HOGG COUNTIES MOVING SOUTH AT 10 MPH. CONTINUE TO MONITOR NOAA WEATHER RADIO...COMMERCIAL RADIO OR TELEVISION OR YOUR LOCAL CABLE OUTLET FOR THE LATEST INFORMATION CONCERNING THESE THUNDERSTORMS APPROACHING OUR NORTHERN REGION. HAVE ADJUSTED ZNS TO REFLECT CURRENT TSTM TRENDS AND PROBABLE AREA OF +TSRA. && .PREV DISCUSSION AT 131 PM... THUNDERSTORMS ASSOCIATED WITH THIS MORNINGS MCS CONTINUE TO MOVE THROUGH SOUTH CENTRAL TEXAS THIS AFTERNOON...WITH ACTIVITY CURRENTLY STAYING NORTH OF CRP AREA. TEMPERATURES IN THE UPPER VALLEY REACHING NEAR 90 RIGHT NOW...WHILE THE LOWER VALLEY IS STUCK UNDER A STUBBORN CLOUD DECK. WESTERN SECTIONS WILL CONTINUE TO DESTABILIZE...AND LIKELY WAIT FOR SOME TYPE OF TRIGGER TO MOVE IN FRO THE NORTH. STARTING TO SEE A FEW CLOUDS STREAKS OFF THE MOUNTAINS TO THE SOUTHWEST...SO SOME OROGRAPHIC INITIATION IS PRETTY CLOSE. SPC HAS AREAS WEST OF US 281 IN THE SLIGHT RISK TODAY. THE EASTERN REGIONS WILL SEE LESS OF A THREAT DUE TO AFOREMENTIONED CLOUD COVER AND CAPPING AND REDUCED DAYTIME HEATING. THUNDERSTORM CHANCES WILL CONTINUE THROUGH THE OVERNIGHT HOURS...WITH THE BIGGEST THREAT REMAINING NORTH OF THE VALLEY. SOME THUNDERSTORMS ARE POSSIBLE AGAIN TOMORROW...BUT THE UPPER LEVEL DYNAMICS WILL BE FARTHER NORTH AND WILL HAVE TROUBLE REACHING DEEP SOUTH TEXAS. THE UPPER LOW WILL MOVE TO THE NORTHEAST BY WEDNESDAY...AND WILL BE REPLACED WITH WEAK RIDGING. THIS AND DRIER AIR ALOFT WILL KEEP PRECIPITATION AT BAY AND ALLOW TEMPS TO GRADUALLY INCREASE THROUGH THE WEEKEND...REACHING 5 TO 7 DEGREES ABOVE NORMAL. && .MARINE...MODERATE SOUTHEAST WINDS WILL CONTINUE FOR THE NEXT SEVERAL DAYS AS SURFACE LOW PRESSURE OVER MEXICO INTERACTS WITH HIGH PRESSURE OVER THE GULF TO MAINTAIN THE TIGHT PRESSURE GRADIENT. SMALL CRAFT ADVISORIES ARE LIKELY FOR THE LAGUNA MADRE AGAIN TUESDAY. SHOWERS AND THUNDERSTORMS REMAIN POSSIBLE THROUGH THURSDAY AS A SLOW MOVING UPPER LOW MOVES ACROSS NORTH TEXAS. && .AVIATION...BREEZY SE WINDS WILL DECOUPLE OVERNIGHT WITH LLJ ADVECTING IN MVFR CIGS. AND GUSTY SOUTHEAST SURFACE WINDS WILL PERSIST THIS AFTERNOON AND WILL RETURN TUESDAY AFTERNOON. MVFR CIGS WILL LIFT AND SCT BY LATE AM AND WINDS WILL MIX DOWN WITH SE WINDS 20G30KTS BY AFTERNOON WITH ISOLD SHRA/TSRA PRODUCING TEMPO MVFR TO IFR CIGS/VIS. && .PRELIMINARY POINT TEMPS/POPS... BAYVIEW/PORT ISABEL 74 86 75 87 / 20 20 10 10 BROWNSVILLE 74 88 74 88 / 20 20 10 10 HARLINGEN 72 88 73 91 / 20 20 10 10 MCALLEN 73 91 74 93 / 20 20 10 10 RIO GRANDE CITY 74 93 74 95 / 20 20 10 10 SOUTH PADRE ISLAND 75 82 74 84 / 20 20 10 10 && .BRO WATCHES/WARNINGS/ADVISORIES... SCA GMZ130-132-135 THROUGH 7 PM. && THIS PRODUCT IS ALSO AVAILABLE ON OUR INTERNET WEB PAGE AT: HTTP://WWW.SRH.NOAA.GOV/BRO 58/55/MARTINEZ
Hazardous weather outlook, Apr 30, 7:45 PM CDT, 1 hour 40 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE BROWNSVILLE TX 745 PM CDT MON APR 30 2007 TXZ248>257-011200- ZAPATA-JIM HOGG-BROOKS-KENEDY-STARR-HIDALGO-INLAND WILLACY- INLAND CAMERON-COASTAL WILLACY-COASTAL CAMERON- 745 PM CDT MON APR 30 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR DEEP SOUTH TEXAS. .DAY ONE...REMAINDER OF TONIGHT. THERE IS A RISK OF SEVERE THUNDERSTORMS FOR ZAPATA...JIM HOGG AND BROOKS COUNTIES THROUGH MIDNIGHT. THE MAIN THREAT IS LARGE HAIL AND HEAVY RAINFALL...WITH SOME OF THESE SEVERE THUNDERSTORMS CAPABLE OF PRODUCING A TORNADO. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR WESTERN PORTIONS OF DEEP SOUTH TEXAS TUESDAY. RIP CURRENT RISK MAY INCREASE TO MODERATE ON TUESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS POSSIBLE TONIGHT AND TUESDAY...ESPECIALLY FOR THE NORTHERN COUNTIES OF THE RIO GRANDE VALLEY. SPOTTERS AND EMERGENCY MANAGERS SHOULD STAY TUNED TO DEVELOPING WEATHER. PHILO
In the hours before
Special weather statement, Apr 30, 6:49 PM CDT, 2 hours 36 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BROWNSVILLE TX 649 PM CDT MON APR 30 2007 TXZ248>251-010045- JIM HOGG TX-ZAPATA TX-BROOKS TX-KENEDY TX- 649 PM CDT MON APR 30 2007 ...A TORNADO WATCH IS IN EFFECT JUST NORTH OF THE THE RIO GRANDE VALLEY... ...STRONG TORNADIC THUNDERSTORMS WITH LARGE HAIL CONTINUE TO DRIFT SOUTH TOWARD JIM HOGG...ZAPATA AND BROOKS COUNTIES... A TORNADO WATCH REMAINS IN EFFECT FOR AREAS JUST NORTH OF THE RIO GRANDE VALLEY UNTIL 10 PM. SEVERE TORNADIC THUNDERSTORMS HAVE PERSISTED IN NORTHERN AND CENTRAL DUVAL COUNTY EARLY THIS EVENING...AND THESE DANGEROUS THUNDERSTORMS HAVE BEEN DRIFTING SLOWLY SOUTH TOWARD NORTHERN JIM HOGG AND ZAPATA COUNTIES. THE ATMOSPHERE REMAINS VERY SUPPORTIVE FOR THE PERSISTENCE OF THESE THUNDERSTORMS. LIFT AND INFLOW ALONG THE OUTFLOW BOUNDARIES ASSOCIATED WITH THE THUNDERSTORM DEVELOPMENT SHOULD LEAD TO RENEWED UPDRAFT AND MIGRATION TO PORTIONS OF THE UPPER RIO GRANDE VALLEY. IN ADDITION TO THE TORNADO THREAT FROM THESE STORMS...VERY LARGE HAIL AND EXTREME RAINFALL TOTALS ARE ALSO POSSIBLE. AT THIS TIME...THE THUNDERSTORMS REMAIN ABOUT 40 MILES NORTH OF ZAPATA AND JIM HOGG COUNTIES MOVING SOUTH AT 10 MPH. CONTINUE TO MONITOR NOAA WEATHER RADIO...COMMERCIAL RADIO OR TELEVISION OR YOUR LOCAL CABLE OUTLET FOR THE LATEST INFORMATION CONCERNING THESE THUNDERSTORMS APPROACHING OUR NORTHERN REGION. PHILO PHILO
Local storm report, Apr 30, 8:52 PM CDT, 33 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
852 PM CDT MON APR 30 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0842 PM HAIL 20 WSW HEBBRONVILLE 27.21N 98.99W
04/30/2007 M1.75 INCH ZAPATA TX TRAINED SPOTTER
WEATHER SPOTTER REPORTED GOLF BALL SIZE HAIL.
&&
BCThe office that day
Everything else NWS Brownsville, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 30, 8:08 PM CDT | Severe Thunderstorm Warning | BRO | Jim Hogg, Zapata | 52 min |
| Apr 30, 8:48 PM CDT | Tornado Warning | BRO | Jim Hogg | 25 min |
| Apr 30, 8:53 PM CDT | Flash Flood Warning | BRO | Jim Hogg, Zapata | 2 hr |
| Apr 30, 9:00 PM CDT | Severe Thunderstorm Warning | BRO | Jim Hogg, Zapata | 45 min |
| Apr 30, 9:41 PM CDT | Severe Thunderstorm Warning | BRO | Jim Hogg, Zapata | 34 min |
| Apr 30, 9:52 PM CDT | Severe Thunderstorm Warning | BRO | Jim Hogg, Starr, Zapata | 38 min |
| Apr 30, 10:12 PM CDT | Severe Thunderstorm Warning | BRO | Jim Hogg, Starr, Zapata | 48 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2007Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.