Alert archive / Texas / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 93

April 13, 200222 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Apr 13, 2002, 3:45 PM CDT for 22 counties in Texas. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Apr 13, 2002, 3:45 PM CDT (20:45 UTC)
Expired
Apr 13, 2002, 9:00 PM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 22 counties

Bailey County, TX, Briscoe County, TX, Childress County, TX, Cochran County, TX, Cottle County, TX, Crosby County, TX, Dawson County, TX, Dickens County, TX, Floyd County, TX, Gaines County, TX, Garza County, TX, Hale County, TX, Hall County, TX, Hockley County, TX, Kent County, TX, King County, TX, Lamb County, TX, Lubbock County, TX, Lynn County, TX, Motley County, TX, Terry County, TX, Yoakum County, TX

The radar

The Lubbock radar (KLBB), 16 km from the middle of the area, began a volume at 20:48 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Warnings issued inside it

10 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Apr 13, 4:15 PM CDTSevere Thunderstorm WarningLUBHale, Swisher45 min
Apr 13, 4:21 PM CDTSevere Thunderstorm WarningLUBHockley39 min
Apr 13, 4:42 PM CDTTornado WarningLUBHale33 min
Apr 13, 4:43 PM CDTSevere Thunderstorm WarningLUBFloyd47 min
Apr 13, 4:47 PM CDTTornado WarningLUBHale28 min
Apr 13, 4:59 PM CDTSevere Thunderstorm WarningLUBHockley46 min
Apr 13, 5:04 PM CDTSevere Thunderstorm WarningLUBTerry, Yoakum41 min
Apr 13, 5:14 PM CDTSevere Thunderstorm WarningLUBHale61 min
Apr 13, 5:47 PM CDTSevere Thunderstorm WarningLUBTerry, Yoakum43 min
Apr 13, 7:51 PM CDTSevere Thunderstorm WarningMAFAndrews, Gaines54 min

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 8.8 hours before the alert went out and 160 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 12:00Z on 2002-04-13Temperature 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, Amarillo Airport, TX at 12:00Z on 2002-04-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 72 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1354 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
96 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 
WWUS20 KWNS 132032
SEL3  
SPC WW 132028
TXZ000-140200-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 93
STORM PREDICTION CENTER NORMAN OK
328 PM CDT SAT APR 13 2002

THE STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

   SOUTHERN TEXAS PANHANDLE                              

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 345 PM UNTIL 900
PM CDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 60 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 75 MILES WEST SOUTHWEST OF LUBBOCK
TEXAS TO 25 MILES SOUTHEAST OF CHILDRESS TEXAS.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. 
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.  SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES.


DISCUSSION...THUNDERSTORMS EXPECTED TO INCREASE IN NUMBER AND
INTENSIFY ALONG BOUNDARIES ACROSS SRN PANHANDLE.  WITH ELY LOW
LEVEL MOIST FLOW AND MDT MID LEVELS WLYS...SHEAR PROFILES FAVORABLE
FOR ORGANIZED STORMS WITH ISOLATED SUPERCELLS.  PRIMARY THREAT WILL
BE LARGE HAIL GIVEN THE MARGINAL SHEAR.  STEEP LAPSE RATES AND
CAPES AROUND 2000 J/KG ARE AVAILABLE IN THE AREA FOR SEVERE
DEVELOPMENT.


AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.  MEAN STORM
MOTION VECTOR 30025.


...HALES

331,0995 322,1030 340,1030 350,0995

WWUS20 KWNS 132032
SEL3  
SPC WW 132028
TXZ000-140200-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 93
STORM PREDICTION CENTER NORMAN OK
328 PM CDT SAT APR 13 2002

THE STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

   SOUTHERN TEXAS PANHANDLE                              

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 345 PM UNTIL 900
PM CDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 60 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 75 MILES WEST SOUTHWEST OF LUBBOCK
TEXAS TO 25 MILES SOUTHEAST OF CHILDRESS TEXAS.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. 
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.  SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES.


DISCUSSION...THUNDERSTORMS EXPECTED TO INCREASE IN NUMBER AND
INTENSIFY ALONG BOUNDARIES ACROSS SRN PANHANDLE.  WITH ELY LOW
LEVEL MOIST FLOW AND MDT MID LEVELS WLYS...SHEAR PROFILES FAVORABLE
FOR ORGANIZED STORMS WITH ISOLATED SUPERCELLS.  PRIMARY THREAT WILL
BE LARGE HAIL GIVEN THE MARGINAL SHEAR.  STEEP LAPSE RATES AND
CAPES AROUND 2000 J/KG ARE AVAILABLE IN THE AREA FOR SEVERE
DEVELOPMENT.


AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.  MEAN STORM
MOTION VECTOR 30025.


...HALES

331,0995 322,1030 340,1030 350,0995

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 12, 7:45 PM CDTSevere Thunderstorm WatchSPCArmstrong, Carson, Collingsworth, Dallam, Deaf Smith, Donley and 14 more6 hr
Apr 12, 11:30 PM CDTTornado WatchSPCArmstrong, Briscoe, Carson, Childress, Collingsworth, Donley and 17 more6 hr
Apr 13, 4:45 AM CDTSevere Thunderstorm WatchSPCArcher, Baylor, Foard, Hardeman, Knox, Wichita and 1 more5 hr
Apr 13, 5:00 AM CDTTornado WatchSPCArmstrong, Briscoe, Carson, Castro, Childress, Collingsworth and 13 more5 hr
Apr 13, 10:45 AM CDTSevere Thunderstorm WatchSPCCollin, Cooke, Dallas, Delta, Denton, Fannin and 11 more5 hr

Nearby

Severe Thunderstorm Watches in Texas, 2002Every severe thunderstorm watch in 2002

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; radar from the NEXRAD Level II archive.