Alert archive / Texas / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 64, NWS Houston/Galveston, TX

August 31, 1990Trinity County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Aug 31, 1990, 2:54 PM CDT for Trinity County, Texas. It was in force for 66 min.

The area

The counties it named.

The facts

Issued
Aug 31, 1990, 2:54 PM CDT (19:54 UTC)
Expired
Aug 31, 1990, 4:00 PM CDT
In force
66 min
Issued by
NWS Houston/Galveston, TX
Area
Whole counties

County Trinity County, TX

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 7.9 hours before the alert went out and 214 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, Lake Charles Mun, LA at 12:00Z on 1990-08-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2238 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, Lake Charles Mun, LA at 12:00Z on 1990-08-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 102 square meters per square second.193958Sfc1 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
2238 J/kg
Mixed-layer CIN
-71 J/kg
Mixed-layer LCL
940 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
102 m²/s²
0-3 km storm-relative helicity
124 m²/s²
Significant tornado parameter
0.9
Supercell composite
9.2

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
Aug 31, 2:33 PM CDTSevere Thunderstorm WarningHGXPolk57 min
Aug 31, 3:15 PM CDTSevere Thunderstorm WarningHGXGalveston60 min
Aug 31, 3:30 PM CDTSevere Thunderstorm WarningHGXHarris60 min
Aug 31, 3:55 PM CDTSevere Thunderstorm WarningHGXHouston65 min
Aug 31, 4:16 PM CDTSevere Thunderstorm WarningHGXChambers59 min
Aug 31, 4:40 PM CDTSevere Thunderstorm WarningHGXBrazoria65 min
Aug 31, 5:39 PM CDTSevere Thunderstorm WarningHGXMatagorda66 min

Nearby

Severe Thunderstorm Warnings in Texas, 1990Every severe thunderstorm warning in 1990

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.