Alert archive / Texas / Severe Thunderstorm Watches in 2020

Severe Thunderstorm Watch 154

April 28, 20204 states

The Storm Prediction Center issued this severe thunderstorm watch at Apr 28, 2020, 8:25 PM CDT for 4 states. It was in force for 9 hr.

The area

The outline as issued.

The facts

Issued
Apr 28, 2020, 8:25 PM CDT (01:25 UTC)
Expired
Apr 29, 2020, 5:25 AM CDT
In force
9 hr
Issued by
the Storm Prediction Center
Largest hail expected
3 in
Strongest gust expected
70 kt
All 93 counties

Columbia County, AR, Hempstead County, AR, Howard County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Nevada County, AR, Sevier County, AR, Union County, AR, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, Red River Parish, LA, Sabine Parish, LA, Webster Parish, LA, McCurtain County, OK, Anderson County, TX, Angelina County, TX, Bell County, TX, Bosque County, TX, Bowie County, TX, Brazos County, TX, Burleson County, TX, Camp County, TX, Cass County, TX, Cherokee County, TX, Collin County, TX, Comanche County, TX, Cooke County, TX, Coryell County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Falls County, TX, Fannin County, TX, Franklin County, TX, Freestone County, TX, Grayson County, TX, Gregg County, TX, Grimes County, TX, Hamilton County, TX, Harrison County, TX, Henderson County, TX, Hill County, TX, Hood County, TX, Hopkins County, TX, Houston County, TX, Hunt County, TX, Jack County, TX, Johnson County, TX, Kaufman County, TX, Lamar County, TX, Lampasas County, TX, Leon County, TX, Limestone County, TX, Madison County, TX, Marion County, TX, McLennan County, TX, Milam County, TX, Mills County, TX, Montague County, TX, Morris County, TX, Nacogdoches County, TX, Navarro County, TX, Palo Pinto County, TX, Panola County, TX, Parker County, TX, Rains County, TX, Red River County, TX, Robertson County, TX, Rockwall County, TX, Rusk County, TX, Sabine County, TX, San Augustine County, TX, Shelby County, TX, Smith County, TX, Somervell County, TX, Stephens County, TX, Tarrant County, TX, Titus County, TX, Trinity County, TX, Upshur County, TX, Van Zandt County, TX, Walker County, TX, Washington County, TX, Wise County, TX, Wood County, TX, Young County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 54 km from the middle of the area, began a volume at 01:26 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
20%
One or more EF2 to EF5 tornadoes
10%
Ten or more severe wind reports
90%
One or more gusts of 65 knots or more
70%
Ten or more severe hail reports
60%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
95%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 28, 9:08 PM CDTSevere Thunderstorm WarningFWDMontague52 min
Apr 28, 9:17 PM CDTSevere Thunderstorm WarningSHVMcCurtain43 min
Apr 28, 9:24 PM CDTSevere Thunderstorm WarningSHVMcCurtain36 min
Apr 28, 9:24 PM CDTSevere Thunderstorm WarningFWDCooke36 min
Apr 28, 9:30 PM CDTSevere Thunderstorm WarningFWDJack, Young60 min
Apr 28, 9:31 PM CDTSevere Thunderstorm WarningFWDEastland, Stephens59 min
Apr 28, 9:33 PM CDTTornado WarningSHVMcCurtain42 min
Apr 28, 9:42 PM CDTSevere Thunderstorm WarningSHVMcCurtain12 min
Apr 28, 9:46 PM CDTSevere Thunderstorm WarningSHVRed River44 min
Apr 28, 9:51 PM CDTSevere Thunderstorm WarningSHVMcCurtain39 min
Apr 28, 9:55 PM CDTSevere Thunderstorm WarningFWDCooke, Denton, Montague, Wise65 min
Apr 28, 9:59 PM CDTSevere Thunderstorm WarningFWDJack, Montague, Wise61 min
Apr 28, 10:00 PM CDTTornado WarningSHVMcCurtain16 min
Apr 28, 10:25 PM CDTSevere Thunderstorm WarningSHVHempstead, Howard, Little River, Sevier50 min
Apr 28, 10:25 PM CDTSevere Thunderstorm WarningFWDJack, Palo Pinto, Parker, Wise, Young65 min
Apr 28, 10:27 PM CDTSevere Thunderstorm WarningFWDEastland, Stephens63 min
Apr 28, 10:32 PM CDTSevere Thunderstorm WarningFWDDelta, Fannin, Grayson, Lamar58 min
Apr 28, 10:46 PM CDTSevere Thunderstorm WarningFWDCollin, Dallas, Denton, Rockwall59 min
Apr 28, 10:55 PM CDTSevere Thunderstorm WarningFWDDenton, Parker, Tarrant, Wise50 min
Apr 28, 10:59 PM CDTSevere Thunderstorm WarningFWDDenton, Wise46 min
Apr 28, 11:01 PM CDTSevere Thunderstorm WarningSHVHempstead, Howard, Little River, Miller, Sevier44 min
Apr 28, 11:05 PM CDTSevere Thunderstorm WarningFWDCollin, Delta, Fannin, Hopkins, Hunt, Lamar and 1 more70 min
Apr 28, 11:22 PM CDTSevere Thunderstorm WarningSHVColumbia, Hempstead, Lafayette, Miller, Nevada53 min
Apr 28, 11:24 PM CDTSevere Thunderstorm WarningFWDHood, Johnson, Parker, Somervell, Tarrant66 min
Apr 28, 11:26 PM CDTSevere Thunderstorm WarningFWDComanche, Eastland64 min
Apr 28, 11:26 PM CDTSevere Thunderstorm WarningSHVBowie, Camp, Cass, Franklin, Morris, Titus and 2 more49 min
Apr 28, 11:33 PM CDTSevere Thunderstorm WarningFWDDallas, Hunt, Kaufman, Rains, Rockwall, Van Zandt57 min
Apr 28, 11:42 PM CDTSevere Thunderstorm WarningFWDDallas, Ellis, Tarrant48 min
Apr 28, 11:46 PM CDTSevere Thunderstorm WarningSHVBowie29 min
Apr 29, 12:07 AM CDTSevere Thunderstorm WarningSHVCamp, Franklin, Gregg, Morris, Smith, Upshur and 1 more38 min
Apr 29, 12:11 AM CDTSevere Thunderstorm WarningSHVColumbia, Lafayette, Miller, Union64 min
Apr 29, 12:11 AM CDTSevere Thunderstorm WarningSHVCass, Gregg, Harrison, Marion, Morris, Upshur49 min
Apr 29, 12:20 AM CDTSevere Thunderstorm WarningSHVUnion55 min
Apr 29, 12:21 AM CDTSevere Thunderstorm WarningFWDHill, Johnson54 min
Apr 29, 12:28 AM CDTSevere Thunderstorm WarningFWDEllis, Navarro47 min
Apr 29, 12:33 AM CDTSevere Thunderstorm WarningFWDHood, Johnson, Parker, Somervell, Tarrant42 min
Apr 29, 12:42 AM CDTSevere Thunderstorm WarningSHVCherokee, Gregg, Rusk, Smith, Upshur, Wood63 min
Apr 29, 12:46 AM CDTSevere Thunderstorm WarningSHVBienville, Bossier, Caddo, Claiborne, De Soto, Lincoln and 1 more59 min
Apr 29, 12:50 AM CDTSevere Thunderstorm WarningFWDHenderson, Kaufman, Navarro25 min
Apr 29, 12:51 AM CDTSevere Thunderstorm WarningSHVUnion54 min
Apr 29, 12:52 AM CDTSevere Thunderstorm WarningSHVGregg, Harrison, Panola, Rusk38 min
Apr 29, 1:12 AM CDTSevere Thunderstorm WarningFWDAnderson, Freestone, Henderson, Hill, Limestone, Navarro78 min
Apr 29, 1:15 AM CDTSevere Thunderstorm WarningFWDEllis, Hill, Johnson75 min
Apr 29, 1:20 AM CDTSevere Thunderstorm WarningFWDBosque, Erath, Hood, Somervell55 min
Apr 29, 1:28 AM CDTSevere Thunderstorm WarningSHVNacogdoches, Panola, Rusk, Shelby47 min
Apr 29, 1:29 AM CDTSevere Thunderstorm WarningFWDBell61 min
Apr 29, 1:32 AM CDTSevere Thunderstorm WarningHGXHouston, Trinity58 min
Apr 29, 1:34 AM CDTSevere Thunderstorm WarningSHVBienville, De Soto, Jackson, Natchitoches, Red River, Sabine and 1 more56 min
Apr 29, 1:36 AM CDTSevere Thunderstorm WarningFWDErath54 min
Apr 29, 1:36 AM CDTSevere Thunderstorm WarningSHVCherokee, Nacogdoches, Rusk, Smith39 min
Apr 29, 2:02 AM CDTSevere Thunderstorm WarningFWDBosque, Hill, Limestone, McLennan, Navarro58 min
Apr 29, 2:04 AM CDTSevere Thunderstorm WarningSHVNacogdoches, Rusk, Sabine, San Augustine, Shelby41 min
Apr 29, 2:07 AM CDTSevere Thunderstorm WarningFWDBosque, Comanche, Erath, Hamilton53 min
Apr 29, 2:14 AM CDTSevere Thunderstorm WarningSHVAngelina, Cherokee, Nacogdoches, Rusk46 min
Apr 29, 2:15 AM CDTSevere Thunderstorm WarningFWDMilam45 min
Apr 29, 2:19 AM CDTSevere Thunderstorm WarningSHVCaldwell, De Soto, Grant, LaSalle, Natchitoches, Sabine and 1 more56 min
Apr 29, 2:20 AM CDTSevere Thunderstorm WarningFWDFreestone, Leon, Limestone, Robertson55 min
Apr 29, 2:28 AM CDTSevere Thunderstorm WarningHGXHouston, Madison, Polk, Trinity, Walker62 min
Apr 29, 2:41 AM CDTSevere Thunderstorm WarningSHVAngelina, Nacogdoches, Sabine, San Augustine, Shelby49 min
Apr 29, 2:44 AM CDTSevere Thunderstorm WarningFWDBosque, Comanche, Coryell, Hamilton, Mills61 min
Apr 29, 2:50 AM CDTSevere Thunderstorm WarningHGXBrazos, Grimes, Houston, Madison, Montgomery, Polk and 3 more55 min
Apr 29, 2:53 AM CDTSevere Thunderstorm WarningHGXBurleson, Washington52 min
Apr 29, 2:57 AM CDTSevere Thunderstorm WarningFWDBosque, Falls, Limestone, McLennan63 min
Apr 29, 3:13 AM CDTSevere Thunderstorm WarningFWDBell, Coryell62 min
Apr 29, 3:34 AM CDTSevere Thunderstorm WarningFWDHamilton, Lampasas, Mills71 min
Apr 29, 3:35 AM CDTSevere Thunderstorm WarningHGXBrazos, Burleson, Grimes, Liberty, Montgomery, Polk and 3 more40 min
Apr 29, 3:55 AM CDTSevere Thunderstorm WarningFWDBell, Falls, Milam65 min
Apr 29, 4:11 AM CDTSevere Thunderstorm WarningHGXAustin, Brazos, Burleson, Chambers, Fort Bend, Grimes and 8 more64 min
Apr 29, 4:31 AM CDTSevere Thunderstorm WarningHGXBrazos, Burleson29 min
Apr 29, 4:34 AM CDTSevere Thunderstorm WarningFWDMilam, Robertson18 min
Apr 29, 5:12 AM CDTSevere Thunderstorm WarningHGXAustin, Colorado, Washington33 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

Fort Worth, TX (KFWD), launched 00:00Z, 1.4 hours before the alert went out and 61 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 2020-04-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3210 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 2020-04-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 155 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
3210 J/kg
Mixed-layer CIN
-92 J/kg
Mixed-layer LCL
1442 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
155 m²/s²
0-3 km storm-relative helicity
248 m²/s²
Significant tornado parameter
1.0
Supercell composite
17.8

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 28, 7:35 PM CDTSevere Thunderstorm WatchSPCArkansas, Baxter, Boone, Bradley, Calhoun, Clark and 51 more7 hr
Apr 28, 8:06 PM CDTMesoscale DiscussionSPCLafayette, Little River, Miller, Sevier54 min
Apr 28, 10:08 PM CDTMesoscale DiscussionSPCClark, Cleburne, Conway, Craighead, Faulkner, Garland and 15 more97 min
Apr 28, 11:12 PM CDTMesoscale DiscussionSPCArkansas, Bradley, Calhoun, Cleveland, Crittenden, Cross and 11 more63 min
Apr 28, 11:57 PM CDTMesoscale DiscussionSPCAshley, Chicot63 min
Apr 29, 12:48 AM CDTSevere Thunderstorm WatchSPCAshley, Chicot4 hr
Apr 29, 1:56 AM CDTMesoscale DiscussionSPCAllen, Avoyelles, Beauregard, Bienville, Caldwell, Catahoula and 19 more2 hr
Apr 29, 2:40 AM CDTSevere Thunderstorm WatchSPCAcadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 23 more6 hr
Apr 29, 5:05 AM CDTMesoscale DiscussionSPCCalcasieu, Cameron115 min
Apr 28, 7:02 PM CDTMesoscale DiscussionSPCCarter, Cleveland, Cotton, Garvin, Grady, Jefferson and 7 more88 min
Apr 28, 9:04 PM CDTMesoscale DiscussionSPCJim Hogg, Starr, Zapata116 min

Nearby

Severe Thunderstorm Watches in Texas, 2020Severe Thunderstorm Watches in Arkansas, 2020Severe Thunderstorm Watches in Louisiana, 2020Every severe thunderstorm watch in 2020

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.