Alert archive / Texas / Tornado Warnings in 1991

Tornado Warning 7, NWS Houston/Galveston, TX

January 18, 1991Harris County, Texas

NWS Houston/Galveston, TX issued this tornado warning at Jan 18, 1991, 8:33 AM CST for Harris County, Texas. It was in force for 42 min. 1 report 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
Jan 18, 1991, 8:33 AM CST (14:33 UTC)
Expired
Jan 18, 1991, 9:15 AM CST
In force
42 min
Issued by
NWS Houston/Galveston, TX
Area
Whole counties

County Harris County, TX

What was reported inside it

TimeReportWhereRemark
Jan 18, 8:50 AM CSTTornado F1Harris, 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

Lake Charles Mun, LA (KLCH), launched 12:00Z, 2.6 hours before the alert went out and 213 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 1991-01-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1991-01-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 196 square meters per square second.1939587897117136156Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2306 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
196 m²/s²
0-3 km storm-relative helicity
475 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
Jan 18, 7:20 AM CSTTornado WarningHGXAustin, Colorado, Waller40 min
Jan 18, 7:35 AM CSTSevere Thunderstorm WarningHGXFort Bend, Harris40 min
Jan 18, 8:04 AM CSTTornado WarningHGXHarris41 min
Jan 18, 9:18 AM CSTTornado WarningHGXLiberty57 min
Jan 18, 9:43 AM CSTSevere Thunderstorm WarningHGXChambers62 min
Jan 18, 10:25 AM CSTTornado WarningHGXBrazoria50 min
Jan 18, 10:33 AM CSTSevere Thunderstorm WarningHGXGalveston57 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.