Alert archive / Texas / Tornado Watches in 1999

Tornado Watch 105

April 2, 1999Jackson County, Tillman County, Oklahoma; 42 counties in Texas

The Storm Prediction Center issued this tornado watch at Apr 2, 1999, 9:00 PM CST for Jackson County, Tillman County, Oklahoma; 42 counties in Texas. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Apr 2, 1999, 9:00 PM CST (03:00 UTC)
Expired
Apr 3, 1999, 2:00 AM CST
In force
5 hr
Issued by
the Storm Prediction Center
All 44 counties

Jackson County, OK, Tillman County, OK, Baylor County, TX, Borden County, TX, Briscoe County, TX, Childress County, TX, Coke County, TX, Cottle County, TX, Crane County, TX, Crockett County, TX, Crosby County, TX, Dawson County, TX, Dickens County, TX, Fisher County, TX, Floyd County, TX, Foard County, TX, Garza County, TX, Glasscock County, TX, Hall County, TX, Hardeman County, TX, Haskell County, TX, Howard County, TX, Irion County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Martin County, TX, Midland County, TX, Mitchell County, TX, Motley County, TX, Nolan County, TX, Pecos County, TX, Reagan County, TX, Runnels County, TX, Schleicher County, TX, Scurry County, TX, Sterling County, TX, Stonewall County, TX, Sutton County, TX, Taylor County, TX, Tom Green County, TX, Upton County, TX, Wilbarger County, TX

The radar

The Midland/Odessa radar (KMAF), 87 km from the middle of the area, began a volume at 03:00 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

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

IssuedProductOfficeCountiesLasted
Apr 2, 9:08 PM CSTTornado WarningMAFMidland32 min
Apr 2, 9:11 PM CSTSevere Thunderstorm WarningLUBCrosby, Garza44 min
Apr 2, 9:19 PM CSTSevere Thunderstorm WarningMAFUpton61 min
Apr 2, 9:25 PM CSTSevere Thunderstorm WarningLUBHall50 min
Apr 2, 9:34 PM CSTSevere Thunderstorm WarningMAFHoward61 min
Apr 2, 9:36 PM CSTSevere Thunderstorm WarningLUBFloyd, Motley39 min
Apr 2, 9:38 PM CSTSevere Thunderstorm WarningMAFMartin47 min
Apr 2, 9:46 PM CSTSevere Thunderstorm WarningMAFPecos49 min
Apr 2, 9:52 PM CSTTornado WarningMAFReagan, Upton53 min
Apr 2, 9:55 PM CSTSevere Thunderstorm WarningSJTCrockett65 min
Apr 2, 10:41 PM CSTSevere Thunderstorm WarningMAFReagan49 min
Apr 2, 10:49 PM CSTSevere Thunderstorm WarningMAFScurry31 min
Apr 2, 11:32 PM CSTSevere Thunderstorm WarningSJTFisher48 min
Apr 2, 11:44 PM CSTSevere Thunderstorm WarningOUNJackson46 min
Apr 2, 11:44 PM CSTSevere Thunderstorm WarningOUNFoard, Hardeman, Knox46 min
Apr 2, 11:57 PM CSTSevere Thunderstorm WarningOUNTillman48 min

The nearest sounding before it

Midland Regional, TX (KMAF), launched 00:00Z, 3.0 hours before the alert went out and 88 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 1999-04-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 262 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 1999-04-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 square meters per square second.19395878Sfc1 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
262 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
3070 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
94 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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.

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 2, 8:30 PM CSTTornado WatchSPCAlfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 28 more6 hr
Apr 3, 12:45 AM CSTSevere Thunderstorm WatchSPCBlaine, Caddo, Canadian, Carter, Cleveland, Comanche and 32 more5 hr
Apr 3, 3:45 AM CSTSevere Thunderstorm WatchSPCAdair, Cherokee, Craig, Delaware, Haskell, McIntosh and 7 more5 hr
Apr 3, 7:15 AM CSTSevere Thunderstorm WatchSPCBryan, Choctaw, McCurtain6 hr
Apr 3, 12:00 PM CSTTornado WatchSPCLeFlore, McCurtain6 hr
Apr 3, 4:00 PM CSTTornado WatchSPCAngelina, Hardin, Jasper, Liberty, Montgomery, Nacogdoches and 9 more5 hr

Nearby

Tornado Watches in Texas, 1999Tornado Watches in Oklahoma, 1999Every tornado watch in 1999

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.