Alert archive / Texas / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 30, NWS Houston/Galveston, TX

April 10, 1997Matagorda County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Apr 10, 1997, 10:26 PM CDT for Matagorda County, Texas. It was in force for 59 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 10, 1997, 10:26 PM CDT (03:26 UTC)
Expired
Apr 10, 1997, 11:25 PM CDT
In force
59 min
Issued by
NWS Houston/Galveston, TX
Area
Whole counties

County Matagorda County, TX

The radar

The Houston radar (KHGX), 118 km from the middle of the area, began a volume at 03:28 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 nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 3.4 hours before the alert went out and 176 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 00:00Z on 1997-04-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1820 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Corpus Christi, TX at 00:00Z on 1997-04-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 103 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
1820 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
508 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
103 m²/s²
0-3 km storm-relative helicity
201 m²/s²
Significant tornado parameter
1.8
Supercell composite
9.4

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Houston/Galveston, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 10, 8:04 PM CDT, 2 hours 22 minutes earlier.

Area forecast discussion, Apr 10, 8:04 PM CDT, 2 hours 22 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
8 PM CDT THU APR 10 1997

SHORT WAVE CROSSING SOUTH TEXAS AT 00Z WILL MOVE THROUGH
SOUTHEAS TEXAS OVERNIGHT.  THUNDERSTORMS APPROACHING SEVERE
INDICATION ON RADAR JUST WEST OF CWA...NOT SURPRIZED GIVEN CRP
SOUNDING.  EVEN SOME INDICATION OF WEAK ROTATION. NEED TO INCLUDE
TSTMS ALL ZONES THIS UPDATE.  ALSO MAY WANT TO ADD POSSIBLY
SEVERE...ESPECIALLY WESTERN HALF...NOTH SURE HOW FAR EAST INSTABILITY
WILL RIDE TONIGHT.  SHOULD BE A LULL FRIDAY MORNING TIL MID AFTERNOON
AS SHORT WAVE EXITS EAST AND MAIN TROUGH/FRONT APPROACH FROM WEST.
30

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 10, 11:40 PM CDTSevere Thunderstorm WarningHGXWharton65 min
Apr 11, 12:45 AM CDTSevere Thunderstorm WarningHGXWharton60 min
Apr 11, 1:07 AM CDTFlash Flood WarningHGXWharton118 min
Apr 11, 1:40 AM CDTTornado WarningHGXWharton65 min
Apr 11, 2:04 AM CDTTornado WarningHGXFort Bend61 min
Apr 11, 2:28 AM CDTFlash Flood WarningHGXFort Bend, Wharton3 hr
Apr 11, 2:28 AM CDTTornado WarningHGXBrazoria62 min
Apr 11, 2:40 AM CDTSevere Thunderstorm WarningHGXWharton65 min
Apr 11, 2:58 AM CDTSevere Thunderstorm WarningHGXBrazoria, Fort Bend62 min
Apr 11, 3:42 AM CDTSevere Thunderstorm WarningHGXMatagorda, Wharton33 min
Apr 11, 3:59 AM CDTSevere Thunderstorm WarningHGXBrazoria61 min
Apr 11, 4:08 AM CDTFlash Flood WarningHGXBrazoria3 hr
Apr 11, 4:22 AM CDTTornado WarningHGXBrazoria, Galveston68 min
Apr 11, 5:23 AM CDTSevere Thunderstorm WarningHGXMatagorda67 min
Apr 11, 5:26 AM CDTTornado WarningHGXGalveston64 min
Apr 11, 5:27 AM CDTSevere Thunderstorm WarningHGXHarris63 min
Apr 11, 5:33 AM CDTFlash Flood WarningHGXGalveston3 hr
Apr 11, 5:45 AM CDTSevere Thunderstorm WarningHGXBrazoria60 min
Apr 11, 9:24 AM CDTFlash Flood WarningHGXWharton4 hr
Apr 11, 3:30 PM CDTSevere Thunderstorm WarningHGXHarris60 min
Apr 11, 4:25 PM CDTSevere Thunderstorm WarningHGXHarris, Montgomery65 min
Apr 11, 5:06 PM CDTSevere Thunderstorm WarningHGXLiberty64 min
Apr 11, 5:17 PM CDTSevere Thunderstorm WarningHGXHarris58 min
Apr 11, 6:11 PM CDTTornado WarningHGXHarris49 min
Apr 11, 6:45 PM CDTSevere Thunderstorm WarningHGXChambers60 min
Apr 11, 6:58 PM CDTSevere Thunderstorm WarningHGXHarris32 min

Nearby

Severe Thunderstorm Warnings in Texas, 1997Every severe thunderstorm warning in 1997

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.