Alert archive / Texas / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 690

September 18, 200227 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Sep 18, 2002, 9:55 PM CDT for 27 counties in Texas. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
Sep 18, 2002, 9:55 PM CDT (02:55 UTC)
Expired
Sep 19, 2002, 2:00 AM CDT
In force
4 hr
Issued by
the Storm Prediction Center
All 27 counties

Callahan County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Crockett County, TX, Fisher County, TX, Glasscock County, TX, Haskell County, TX, Howard County, TX, Irion County, TX, Jones County, TX, Kent County, TX, Mitchell County, TX, Nolan County, TX, Reagan County, TX, Runnels County, TX, Schleicher County, TX, Scurry County, TX, Shackelford County, TX, Stephens County, TX, Sterling County, TX, Stonewall County, TX, Taylor County, TX, Throckmorton County, TX, Tom Green County, TX, Upton County, TX, Young County, TX

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Sep 18, 10:08 PM CDTSevere Thunderstorm WarningSJTFisher67 min
Sep 18, 10:33 PM CDTSevere Thunderstorm WarningSJTHaskell, Jones87 min
Sep 18, 11:33 PM CDTSevere Thunderstorm WarningMAFGlasscock87 min
Sep 19, 12:17 AM CDTSevere Thunderstorm WarningMAFUpton73 min
Sep 19, 12:21 AM CDTSevere Thunderstorm WarningMAFUpton39 min
Sep 19, 12:42 AM CDTSevere Thunderstorm WarningMAFGlasscock, Reagan13 days
Sep 19, 12:53 AM CDTSevere Thunderstorm WarningMAFGlasscock13 days
Sep 19, 1:13 AM CDTSevere Thunderstorm WarningSJTIrion, Tom Green62 min
Sep 19, 1:23 AM CDTSevere Thunderstorm WarningSJTCrockett52 min

The nearest sounding before it

Midland Regional, TX (KMAF), launched 00:00Z, 2.9 hours before the alert went out and 117 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, Midland Regional, TX at 00:00Z on 2002-09-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1068 joules per kilogram.LCLEL10008507005003002001001 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, Midland Regional, TX at 00:00Z on 2002-09-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 square meters per square second.1939587897Sfc1 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
1068 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
2684 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
52 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 18, 7:00 PM CDTSevere Thunderstorm WatchSPCArcher, Baylor, Clay, Cooke, Cottle, Foard and 7 more6 hr
Sep 19, 12:05 AM CDTSevere Thunderstorm WatchSPCArcher, Clay, Cooke, Montague6 hr
Sep 19, 1:15 AM CDTSevere Thunderstorm WatchSPCBrown, Callahan, Coke, Coleman, Comanche, Concho and 27 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.