Alert archive / Texas / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 8, NWS Houston/Galveston, TX

February 28, 1987Polk County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Feb 28, 1987, 12:27 AM CST for Polk County, Texas. It was in force for 63 min.

The area

The counties it named.

The facts

Issued
Feb 28, 1987, 12:27 AM CST (06:27 UTC)
Expired
Feb 28, 1987, 1:30 AM CST
In force
63 min
Issued by
NWS Houston/Galveston, TX
Area
Whole counties

County Polk 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 00:00Z, 6.5 hours before the alert went out and 173 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 00:00Z on 1987-02-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1103 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 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 00:00Z on 1987-02-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 127 square meters per square second.1939587897117Sfc1 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
1103 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
557 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
127 m²/s²
0-3 km storm-relative helicity
177 m²/s²
Significant tornado parameter
0.8
Supercell composite
4.3

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
Feb 27, 10:48 PM CSTSevere Thunderstorm WarningHGXAustin, Fort Bend, Waller57 min
Feb 27, 11:44 PM CSTSevere Thunderstorm WarningHGXMontgomery61 min

Nearby

Severe Thunderstorm Warnings in Texas, 1987Every severe thunderstorm warning in 1987

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.