Alert archive / Texas / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 2, NWS Fort Worth, TX

February 18, 1991Limestone County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Feb 18, 1991, 6:09 AM CST for Limestone County, Texas. It was in force for 36 min.

The area

The counties it named.

The facts

Issued
Feb 18, 1991, 6:09 AM CST (12:09 UTC)
Expired
Feb 18, 1991, 6:45 AM CST
In force
36 min
Issued by
NWS Fort Worth, TX
Area
Whole counties

County Limestone County, TX

The nearest sounding before it

Longview/Gregg, TX (KGGG), launched 12:00Z, 0.2 hours before the alert went out and 207 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, Longview/Gregg, TX at 12:00Z on 1991-02-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 417 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, Longview/Gregg, TX at 12:00Z on 1991-02-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 285 square meters per square second.1939587897117136Sfc1 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
417 J/kg
Mixed-layer CIN
-79 J/kg
Mixed-layer LCL
812 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
285 m²/s²
0-3 km storm-relative helicity
269 m²/s²
Significant tornado parameter
0.6
Supercell composite
2.2

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 Fort Worth, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 18, 5:37 AM CSTSevere Thunderstorm WarningFWDFreestone38 min
Feb 18, 12:14 PM CSTSevere Thunderstorm WarningFWDAnderson, Cherokee61 min
Feb 18, 12:14 PM CSTSevere Thunderstorm WarningFWDSmith61 min

Nearby

Severe Thunderstorm Warnings in Texas, 1991Every severe thunderstorm warning 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; the sounding from the Mesonet's radiosonde archive.