Alert archive / Texas / Tornado Warnings in 1991

Tornado Warning 12, NWS Houston/Galveston, TX

May 4, 1991Washington County, Texas

NWS Houston/Galveston, TX issued this tornado warning at May 4, 1991, 7:12 PM CDT for Washington County, Texas. It was in force for 63 min. 3 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
May 4, 1991, 7:12 PM CDT (00:12 UTC)
Expired
May 4, 1991, 8:15 PM CDT
In force
63 min
Issued by
NWS Houston/Galveston, TX
Area
Whole counties

County Washington County, TX

What was reported inside it

TimeReportWhereRemark
May 4, 7:31 PM CDTTornado F0Washington, TX
May 4, 7:34 PM CDTTornado F0Washington, TX
May 4, 8:03 PM CDTTornado F0Washington, TX

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 0.2 hours before the alert went out and 291 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 1991-05-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4154 joules per kilogram.LCLLFCEL10008507005003002001001 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 1991-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 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
4154 J/kg
Mixed-layer CIN
-72 J/kg
Mixed-layer LCL
618 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
58 m²/s²
Significant tornado parameter
0.9
Supercell composite
3.6

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.

The office that day

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

IssuedProductOfficeCountiesLasted
May 4, 8:21 PM CDTSevere Thunderstorm WarningHGXWaller54 min
May 4, 8:49 PM CDTSevere Thunderstorm WarningHGXWharton56 min
May 4, 9:15 PM CDTSevere Thunderstorm WarningHGXMontgomery60 min
May 4, 9:48 PM CDTSevere Thunderstorm WarningHGXWharton42 min
May 4, 10:13 PM CDTSevere Thunderstorm WarningHGXBrazoria62 min
May 4, 10:16 PM CDTSevere Thunderstorm WarningHGXHarris59 min
May 4, 11:07 PM CDTSevere Thunderstorm WarningHGXMontgomery68 min
May 4, 11:10 PM CDTSevere Thunderstorm WarningHGXChambers, Galveston80 min
May 4, 11:16 PM CDTSevere Thunderstorm WarningHGXBrazoria59 min
May 4, 11:32 PM CDTSevere Thunderstorm WarningHGXLiberty58 min
May 4, 11:47 PM CDTSevere Thunderstorm WarningHGXChambers, Galveston58 min
May 5, 12:27 AM CDTSevere Thunderstorm WarningHGXLiberty63 min
May 5, 4:59 PM CDTSevere Thunderstorm WarningHGXChambers, Galveston61 min

Nearby

Tornado Warnings in Texas, 1991Every tornado warning in 1991Tornadoes in 1991

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.