Alert archive / Texas / Severe Thunderstorm Watches in 2004

Severe Thunderstorm Watch 144

May 1, 20049 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at May 1, 2004, 9:55 AM CDT for 9 counties in Texas. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
May 1, 2004, 9:55 AM CDT (14:55 UTC)
Expired
May 1, 2004, 3:00 PM CDT
In force
5 hr
Issued by
the Storm Prediction Center

Counties Brooks County, TX, Cameron County, TX, Hidalgo County, TX, Jim Hogg County, TX, Kenedy County, TX, Kleberg County, TX, Starr County, TX, Willacy County, TX, Zapata County, TX

The radar

The Brownsville radar (KBRO), 111 km from the middle of the area, began a volume at 14:59 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

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

IssuedProductOfficeCountiesLasted
May 1, 11:01 AM CDTFlash Flood WarningBROStarr119 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Brownsville Intl, TX (KBRO), launched 12:00Z, 2.9 hours before the alert went out and 114 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, Brownsville Intl, TX at 12:00Z on 2004-05-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1935 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, Brownsville Intl, TX at 12:00Z on 2004-05-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 112 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
1935 J/kg
Mixed-layer CIN
-157 J/kg
Mixed-layer LCL
826 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
112 m²/s²
0-3 km storm-relative helicity
156 m²/s²
Significant tornado parameter
0.1
Supercell composite
2.3

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 30, 7:00 PM CDTMesoscale DiscussionSPCBosque, Brown, Coleman, Comanche, Concho, Eastland and 11 more90 min
Apr 30, 7:22 PM CDTMesoscale DiscussionSPCAnderson, Bowie, Camp, Cass, Cherokee, Delta and 25 more83 min
Apr 30, 7:40 PM CDTSevere Thunderstorm WatchSPCAnderson, Bowie, Camp, Delta, Ellis, Fannin and 20 more5 hr
Apr 30, 8:14 PM CDTMesoscale DiscussionSPCArcher, Clay, Collin, Cooke, Denton, Grayson and 8 more91 min
Apr 30, 9:07 PM CDTMesoscale DiscussionSPCBosque, Brown, Comanche, Coryell, Erath, Hamilton and 8 more53 min
Apr 30, 9:54 PM CDTMesoscale DiscussionSPCAnderson, Bowie, Camp, Delta, Ellis, Franklin and 19 more96 min
Apr 30, 10:34 PM CDTMesoscale DiscussionSPCBrown, Coleman, Concho, Crockett, Edwards, Irion and 15 more86 min
Apr 30, 11:35 PM CDTSevere Thunderstorm WatchSPCBlanco, Concho, Crockett, Edwards, Gillespie, Irion and 13 more5 hr
Apr 30, 11:56 PM CDTMesoscale DiscussionSPCChambers, Galveston, Grimes, Hardin, Harris, Jasper and 10 more94 min
May 1, 12:50 AM CDTSevere Thunderstorm WatchSPCAnderson, Bell, Bosque, Bowie, Camp, Cass and 47 more6 hr
May 1, 1:34 AM CDTMesoscale DiscussionSPCAtascosa, Bandera, Bexar, Blanco, Comal, Concho and 24 more86 min
May 1, 1:49 AM CDTMesoscale DiscussionSPCAnderson, Bell, Cherokee, Falls, Freestone, Henderson and 5 more86 min
May 1, 2:38 AM CDTMesoscale DiscussionSPCAngelina, Sabine, San Augustine, Shelby37 min
May 1, 3:10 AM CDTSevere Thunderstorm WatchSPCAngelina, Sabine, San Augustine, Shelby6 hr
May 1, 3:28 AM CDTMesoscale DiscussionSPCAtascosa, Bandera, Bexar, Blanco, Concho, Crockett and 23 more92 min
May 1, 3:41 AM CDTMesoscale DiscussionSPCAustin, Brazoria, Brazos, Burleson, Chambers, Colorado and 18 more64 min
May 1, 3:50 AM CDTTornado WatchSPCAngelina, Austin, Bastrop, Brazos, Burleson, Chambers and 25 more6 hr
May 1, 5:13 AM CDTMesoscale DiscussionSPCAnderson, Cherokee, Harrison, Nacogdoches, Panola, Rusk and 1 more92 min
May 1, 5:40 AM CDTSevere Thunderstorm WatchSPCAtascosa, Bee, Bexar, Caldwell, DeWitt, Dimmit and 17 more6 hr
May 1, 6:08 AM CDTMesoscale DiscussionSPCAngelina, Austin, Brazos, Burleson, Chambers, Colorado and 24 more97 min
May 1, 7:24 AM CDTMesoscale DiscussionSPCSabine, San Augustine, Shelby96 min
May 1, 7:33 AM CDTMesoscale DiscussionSPCAtascosa, Bee, Bexar, Caldwell, DeWitt, Dimmit and 16 more87 min
May 1, 7:47 AM CDTMesoscale DiscussionSPCAustin, Bastrop, Brazos, Burleson, Chambers, Colorado and 23 more88 min
May 1, 9:16 AM CDTMesoscale DiscussionSPCBrazoria, Chambers, Fort Bend, Galveston, Hardin, Harris and 3 more59 min
May 1, 9:36 AM CDTMesoscale DiscussionSPCNueces114 min
May 1, 9:45 AM CDTTornado WatchSPCBrazoria, Chambers, Fort Bend, Galveston, Hardin, Harris and 6 more5 hr
May 1, 11:15 AM CDTMesoscale DiscussionSPCKenedy2 hr
May 1, 1:14 PM CDTMesoscale DiscussionSPCWillacy2 hr

Nearby

Severe Thunderstorm Watches in Texas, 2004Every severe thunderstorm watch in 2004

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.