Alert archive / Texas / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 21, NWS Lubbock, TX

May 11, 1991Lamb County, Texas

NWS Lubbock, TX issued this severe thunderstorm warning at May 11, 1991, 9:25 PM CDT for Lamb County, Texas. It was in force for 65 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
May 11, 1991, 9:25 PM CDT (02:25 UTC)
Expired
May 11, 1991, 10:30 PM CDT
In force
65 min
Issued by
NWS Lubbock, TX
Area
Whole counties

County Lamb County, TX

What was reported inside it

TimeReportWhereRemark
May 11, 10:10 PM CDTHail 1.75Lamb, 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

Amarillo Airport, TX (KAMA), launched 00:00Z, 2.4 hours before the alert went out and 142 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, Amarillo Airport, TX at 00:00Z on 1991-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2372 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, Amarillo Airport, TX at 00:00Z on 1991-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 65 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
2372 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
1498 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
65 m²/s²
0-3 km storm-relative helicity
155 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KLBB 120226
SVRLBB
TXC279-120330-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LUBBOCK TX
925 PM CDT SAT MAY 11 1991
 
THE NATIONAL WEATHER SERVICE IN LUBBOCK HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1030 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHWEST TEXAS
 
   ...EASTERN LAMB COUNTY
 
THE TORNADO WARNING FOR LAMB COUNTY HAS BEEN CANCELLED. THERE HAVE
BEEN NO FURTHER INDICATIONS OF A TORNADO WHICH WAS REPORTED EARLIER
IN LAMB COUNTY.  HOWEVER RADAR STILL INDICATES SEVERE
THUNDERSTORMS OVER EASTERN LAMB COUNTY.  STORMS CONTINUE TO MOVE TO
THE NORTH NORTHEAST AT 20 MPH. GOLFBALL SIZE HAIL WAS REPORTED AT
9 PM CDT IN LITTLEFIELD BY THE EARTH FIRE DEPARTMENT.
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WE\ATHER CONDITIONS.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, May 11, 4:21 PM CDT, 5 hours 4 minutes before
TXZ007>012-112300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LUBBOCK TX
420 PM CDT SAT MAY 11 1991

...TORNADO WATCH IN EFFECT FOR MOST OF THE SOUTH PLAINS...

A TORNADO WATCH IS IN EFFECT FOR THE WESTERN AND CENTRAL COUNTIES OF
THE SOUTH PLAINS UNTIL 11 PM CDT. ONLY KING COUNTY AND COTTLE COUNTY
OF THE EXTREME EASTERN SOUTH PLAINS ARE NOT INCLUDED IN THIS WATCH.

AT THIS TIME THE ONLY THUNDERSTORM INDICATED OVER THE SOUTH PLAINS
WAS IN EXTREME SOUTHEASTERN HOCKLEY COUNTY JUST WEST OF ROPESVILLE.
MOVEMENT WAS NORTHEAST AT 25 MPH.

MONITOR NOAA WEATHER RADIO OR COMMERCIAL RADIO AND TELEVISION FOR
LATER STATEMENTS AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER
SERVICE REGARDING THIS POTENTIALLY DANGEROUS WEATHER SITUATION.

DB
Special weather statement, May 11, 5:09 PM CDT, 4 hours 16 minutes before
TXZ007>012-112300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LUBBOCK TX
505 PM CDT SAT MAY 11 1991

...TORNADO WATCH IN EFFECT FOR MOST OF THE SOUTH PLAINS...

A TORNADO WATCH IS IN EFFECT FOR THE WESTERN AND CENTRAL COUNTIES OF
THE SOUTH PLAINS UNTIL 11 PM CDT.

AT 500 PM NATIONAL WEATHER SERVICE RADAR INDICATED A STRONG
THUNDERSTORM OVER SOUTHWEST HALE COUNTY...ABOUT 8 MILES SOUTHWEST
OF HALE CENTER. MOVEMENT WAS NORTHEAST AT 20 MPH. OTHER THUNDERSTORMS
WERE SCATTERED TO THE WEST OF LUBBOCK...ACROSS EASTERN HOCKLEY AND
WESTERN LUBBOCK COUNTIES. AS OF 505 PM NO SEVERE WEATHER WAS
INDICATED IN ANY OF THESE THUNDERSTORMS.

MONITOR NOAA WEATHER RADIO OR COMMERCIAL RADIO AND TELEVISION FOR
LATER STATEMENTS AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER
SERVICE REGARDING THIS POTENTIALLY DANGEROUS WEATHER SITUATION.

DB

The office that day

Everything else NWS Lubbock, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 11, 7:09 PM CDTSevere Thunderstorm WarningLUBLamb66 min
May 11, 7:15 PM CDTTornado WarningLUBHale30 min
May 11, 7:36 PM CDTTornado WarningLUBHockley54 min
May 11, 8:21 PM CDTSevere Thunderstorm WarningLUBHockley54 min
May 11, 8:39 PM CDTSevere Thunderstorm WarningLUBLamb66 min
May 11, 8:47 PM CDTSevere Thunderstorm WarningLUBHale43 min
May 11, 9:07 PM CDTTornado WarningLUBLamb38 min
May 11, 9:40 PM CDTSevere Thunderstorm WarningLUBHale65 min
May 11, 9:56 PM CDTTornado WarningLUBHale49 min
May 11, 10:28 PM CDTSevere Thunderstorm WarningLUBLubbock62 min
May 11, 10:44 PM CDTTornado WarningLUBHale61 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.