Alert archive / Texas / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 21, NWS Houston/Galveston, TX

March 14, 2007Brazoria County, Matagorda County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Mar 14, 2007, 12:26 PM CDT for Brazoria County, Matagorda County, Texas. It was in force for 34 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
Mar 14, 2007, 12:26 PM CDT (17:26 UTC)
Expired
Mar 14, 2007, 1:00 PM CDT
In force
34 min
Issued by
NWS Houston/Galveston, TX
Area
Counties, with a storm outline in the text

Counties Brazoria County, TX, Matagorda County, TX

The radar

The Houston radar (KHGX), 95 km from the middle of the area, began a volume at 17:26 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.

The watch it was issued in

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

IssuedProductOfficeLasted
Mar 14, 10:34 AM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 5.4 hours before the alert went out and 200 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-pSkew-T log-p diagram, Corpus Christi, TX at 12:00Z on 2007-03-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1516 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Corpus Christi, TX at 12:00Z on 2007-03-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 241 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1516 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
463 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
241 m²/s²
0-3 km storm-relative helicity
376 m²/s²
Significant tornado parameter
0.0
Supercell composite
9.0

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KHGX 141726
SVRHGX
TXC039-321-141800-
/O.NEW.KHGX.SV.W.0021.070314T1726Z-070314T1800Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1226 PM CDT WED MAR 14 2007

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MATAGORDA COUNTY IN SOUTHEAST TEXAS
  BRAZORIA COUNTY IN SOUTHEAST TEXAS

* UNTIL 100 PM CDT

* AT 1217 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE HAIL.  THIS STORM
  WAS LOCATED NEAR MARKHAM...MOVING EAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  VAN VLECK...
  SWEENY...
  WILD PEACH VILLAGE...
  WEST COLUMBIA...

THIS STORM MAY PRODUCE LARGE DAMAGING HAIL...RESULTING IN EXTENSIVE
PROPERTY DAMAGE OR SERIOUS INJURY. AVOID WINDOWS AND TAKE COVER NOW

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM CDT
WEDNESDAY EVENING FOR SOUTHEAST TEXAS.

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 2903 9609 2886 9603 2894 9559 2916 9566

$$
1 follow-up statement
000 
WWUS54 KHGX 141801
SVSHGX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1258 PM CDT WED MAR 14 2007

TXC015-473-477-141830-
/O.CON.KHGX.SV.W.0022.000000T0000Z-070314T1830Z/
WASHINGTON TX-WALLER TX-AUSTIN TX-
1258 PM CDT WED MAR 14 2007

...A SEVERE THUNDERSTORM WARNING CONTINUES FOR AUSTIN...WALLER AND
WASHINGTON COUNTIES UNTIL 130 PM CDT...

AT 1258 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING  LARGE HAIL...AND DAMAGING
WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 396 MILES
SOUTHEAST OF SARITA...MOVING NORTHEAST AT 45 MPH.

THERE IS ANOTHER STORM THAT IS TRAVELING EAST AT 30 MPH OUT OF 
SOUTHEASTERN COLORADO COUNTY THAT WILL ENTER SOUTHERN AUSTIN COUNTY 
IN THE NEXT 15 MINUTES. THIS STORM MAY PRODUCE HAIL TO NICKEL SIZE 
AND WINDS GUSTING TO OVER 50 MPH. LOCATIONS IMPACTED INCLUDE 
SOUTHERN RURAL AUSTIN COUNTY.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DANGEROUS WINDS AND LARGE DAMAGING HAIL THAT CAN
RESULT IN EXTENSIVE PROPERTY DAMAGE OR SERIOUS INJURY. PEOPLE OUTSIDE
SHOULD MOVE TO A SHELTER...PREFERABLY INSIDE A STRONG BUILDING BUT
AWAY FROM WINDOWS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM CDT
WEDNESDAY EVENING FOR SOUTHEAST TEXAS.

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 3032 9614 3031 9610 3022 9611 3024 9581
      3020 9581 3013 9589 3014 9597 3009 9595
      2984 9624 2995 9639 3010 9621 3032 9624
      3038 9616

$$

The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 13, 7:29 PM CDTSevere Thunderstorm WarningHGXColorado, Wharton31 min
Mar 13, 8:23 PM CDTSevere Thunderstorm WarningHGXFort Bend52 min
Mar 13, 9:17 PM CDTSevere Thunderstorm WarningHGXFort Bend, Harris43 min
Mar 13, 10:02 PM CDTTornado WarningHGXHarris, Montgomery28 min
Mar 13, 10:12 PM CDTSpecial Marine WarningHGX63 min
Mar 13, 10:16 PM CDTSpecial Marine WarningHGX119 min
Mar 14, 12:51 AM CDTSpecial Marine WarningHGX114 min
Mar 14, 1:50 AM CDTSpecial Marine WarningHGX85 min
Mar 14, 2:59 AM CDTSpecial Marine WarningHGX91 min
Mar 14, 9:37 AM CDTSevere Thunderstorm WarningHGXJackson, Wharton38 min
Mar 14, 10:05 AM CDTSevere Thunderstorm WarningHGXBrazoria40 min
Mar 14, 10:17 AM CDTSevere Thunderstorm WarningHGXColorado, Wharton43 min
Mar 14, 10:33 AM CDTSpecial Marine WarningHGX57 min
Mar 14, 10:41 AM CDTSevere Thunderstorm WarningHGXBrazoria49 min
Mar 14, 10:53 AM CDTSevere Thunderstorm WarningHGXBrazoria, Galveston, Harris37 min
Mar 14, 11:26 AM CDTSevere Thunderstorm WarningHGXBrazoria, Galveston34 min
Mar 14, 11:30 AM CDTSpecial Marine WarningHGX45 min
Mar 14, 11:38 AM CDTSevere Thunderstorm WarningHGXWashington52 min
Mar 14, 11:41 AM CDTSevere Thunderstorm WarningHGXBrazoria34 min
Mar 14, 12:01 PM CDTSpecial Marine WarningHGX59 min
Mar 14, 12:15 PM CDTSpecial Marine WarningHGX90 min
Mar 14, 12:34 PM CDTSevere Thunderstorm WarningHGXAustin, Waller, Washington56 min
Mar 14, 12:44 PM CDTSevere Thunderstorm WarningHGXBrazos, Grimes31 min
Mar 14, 1:03 PM CDTSpecial Marine WarningHGX117 min
Mar 14, 1:23 PM CDTSevere Thunderstorm WarningHGXFort Bend37 min
Mar 14, 2:20 PM CDTSpecial Marine WarningHGX55 min
Mar 14, 2:27 PM CDTSpecial Marine WarningHGX93 min
Mar 14, 2:56 PM CDTSevere Thunderstorm WarningHGXBrazoria, Harris49 min
Mar 14, 3:12 PM CDTSevere Thunderstorm WarningHGXChambers48 min
Mar 14, 3:20 PM CDTSpecial Marine WarningHGX85 min
Mar 14, 4:39 PM CDTSpecial Marine WarningHGX96 min
Mar 14, 4:45 PM CDTSevere Thunderstorm WarningHGXBrazoria, Galveston, Harris45 min
Mar 14, 5:07 PM CDTSevere Thunderstorm WarningHGXChambers, Galveston53 min
Mar 14, 6:02 PM CDTSpecial Marine WarningHGX88 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.