Alert archive / Texas / Tornado Watches in 1999

Tornado Watch 203

May 3, 19994 counties in Arkansas; 22 counties in Oklahoma; 27 counties in Texas

The Storm Prediction Center issued this tornado watch at May 3, 1999, 11:30 PM CDT for 4 counties in Arkansas; 22 counties in Oklahoma; 27 counties in Texas. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
May 3, 1999, 11:30 PM CDT (04:30 UTC)
Expired
May 4, 1999, 5:00 AM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 53 counties

Benton County, AR, Crawford County, AR, Sebastian County, AR, Washington County, AR, Adair County, OK, Atoka County, OK, Bryan County, OK, Cherokee County, OK, Choctaw County, OK, Coal County, OK, Delaware County, OK, Haskell County, OK, Hughes County, OK, Latimer County, OK, LeFlore County, OK, Mayes County, OK, McCurtain County, OK, McIntosh County, OK, Muskogee County, OK, Okmulgee County, OK, Pittsburg County, OK, Pushmataha County, OK, Rogers County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK, Anderson County, TX, Camp County, TX, Collin County, TX, Dallas County, TX, Delta County, TX, Ellis County, TX, Fannin County, TX, Franklin County, TX, Freestone County, TX, Grayson County, TX, Henderson County, TX, Hill County, TX, Hopkins County, TX, Hunt County, TX, Kaufman County, TX, Lamar County, TX, Limestone County, TX, McLennan County, TX, Navarro County, TX, Rains County, TX, Red River County, TX, Rockwall County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Van Zandt County, TX, Wood County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 150 km from the middle of the area, began a volume at 04:34 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
May 3, 11:32 PM CDTTornado WarningTSACreek, Tulsa43 min
May 3, 11:58 PM CDTSevere Thunderstorm WarningTSACraig, Mayes, Rogers47 min
May 4, 12:10 AM CDTTornado WarningTSATulsa50 min
May 4, 12:18 AM CDTTornado WarningTSARogers57 min
May 4, 12:44 AM CDTSevere Thunderstorm WarningOUNHughes, Seminole46 min
May 4, 1:24 AM CDTSevere Thunderstorm WarningTSAMuskogee, Wagoner51 min
May 4, 1:47 AM CDTTornado WarningOUNHughes28 min
May 4, 1:47 AM CDTSevere Thunderstorm WarningTSACherokee43 min
May 4, 1:51 AM CDTTornado WarningTSAMuskogee39 min
May 4, 1:57 AM CDTTornado WarningTSACherokee33 min
May 4, 2:28 AM CDTTornado WarningTSAMuskogee32 min
May 4, 2:35 AM CDTSevere Thunderstorm WarningSHVRed River45 min
May 4, 2:36 AM CDTTornado WarningTSAOkfuskee, Okmulgee39 min
May 4, 2:38 AM CDTTornado WarningTSAWagoner52 min
May 4, 2:46 AM CDTTornado WarningTSABenton44 min
May 4, 3:11 AM CDTTornado WarningTSAAdair34 min

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 4.5 hours before the alert went out and 134 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, Fort Worth, TX at 00:00Z on 1999-05-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2685 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, Fort Worth, TX at 00:00Z on 1999-05-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 143 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
2685 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
1189 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
143 m²/s²
0-3 km storm-relative helicity
204 m²/s²
Significant tornado parameter
1.5
Supercell composite
14.3

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
May 4, 11:00 AM CDTTornado WatchSPCBenton, Carroll, Crawford, Franklin, Madison, Scott and 2 more5 hr
May 4, 3:00 PM CDTTornado WatchSPCBaxter, Benton, Boone, Carroll, Clark, Cleburne and 38 more6 hr
May 4, 5:45 PM CDTTornado WatchSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clay and 30 more4 hr
May 3, 7:15 PM CDTTornado WatchSPCAlfalfa, Blaine, Bryan, Caddo, Canadian, Carter and 33 more5 hr
May 3, 7:30 PM CDTTornado WatchSPCLove, Marshall5 hr
May 3, 10:45 PM CDTTornado WatchSPCAlfalfa, Blaine, Caddo, Canadian, Carter, Cleveland and 42 more6 hr
May 4, 12:00 AM CDTTornado WatchSPCCraig, Kay, Nowata, Osage, Ottawa, Washington5 hr
May 4, 5:00 AM CDTTornado WatchSPCAlfalfa, Blaine, Caddo, Canadian, Carter, Cleveland and 41 more6 hr
May 4, 3:00 AM CDTTornado WatchSPCBandera, Brown, Burnet, Concho, Coryell, Crockett and 18 more2 hr
May 4, 5:00 AM CDTTornado WatchSPCArcher, Baylor, Blanco, Bosque, Brown, Burnet and 46 more6 hr

Nearby

Tornado Watches in Texas, 1999Tornado Watches in Oklahoma, 1999Tornado Watches in Arkansas, 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.