Alert archive / Texas / Severe Thunderstorm Watches in 2017

Severe Thunderstorm Watch 139

April 10, 20174 states

The Storm Prediction Center issued this severe thunderstorm watch at Apr 10, 2017, 2:26 PM CDT for 4 states. It was in force for 9 hr.

The area

The outline as issued.

The facts

Issued
Apr 10, 2017, 2:26 PM CDT (19:26 UTC)
Expired
Apr 10, 2017, 11:00 PM CDT
In force
9 hr
Issued by
the Storm Prediction Center
Largest hail expected
3 in
Strongest gust expected
65 kt
All 87 counties

Hempstead County, AR, Howard County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Nevada County, AR, Sevier County, AR, Bossier Parish, LA, Caddo Parish, LA, McCurtain County, OK, Anderson County, TX, Bandera County, TX, Bastrop County, TX, Bell County, TX, Blanco County, TX, Bosque County, TX, Bowie County, TX, Brazos County, TX, Burleson County, TX, Burnet County, TX, Caldwell County, TX, Camp County, TX, Cass County, TX, Cherokee County, TX, Collin County, TX, Comal County, TX, Coryell County, TX, Crockett County, TX, Dallas County, TX, Delta County, TX, Edwards County, TX, Ellis County, TX, Falls County, TX, Fannin County, TX, Franklin County, TX, Freestone County, TX, Gillespie County, TX, Gregg County, TX, Hamilton County, TX, Harrison County, TX, Hays County, TX, Henderson County, TX, Hill County, TX, Hopkins County, TX, Houston County, TX, Hunt County, TX, Johnson County, TX, Kaufman County, TX, Kendall County, TX, Kerr County, TX, Kimble County, TX, Lamar County, TX, Lampasas County, TX, Lee County, TX, Leon County, TX, Limestone County, TX, Llano County, TX, Madison County, TX, Marion County, TX, Mason County, TX, McCulloch County, TX, McLennan County, TX, Menard County, TX, Milam County, TX, Mills County, TX, Morris County, TX, Navarro County, TX, Panola County, TX, Rains County, TX, Real County, TX, Red River County, TX, Robertson County, TX, Rockwall County, TX, Rusk County, TX, San Saba County, TX, Schleicher County, TX, Smith County, TX, Somervell County, TX, Sutton County, TX, Tarrant County, TX, Titus County, TX, Travis County, TX, Upshur County, TX, Val Verde County, TX, Van Zandt County, TX, Williamson County, TX, Wood County, TX

The radar

The Ft Hood radar (KGRK), 97 km from the middle of the area, began a volume at 19:25 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
10%
One or more EF2 to EF5 tornadoes
5%
Ten or more severe wind reports
50%
One or more gusts of 65 knots or more
40%
Ten or more severe hail reports
50%
One or more hailstones of 2 inches or more
40%
Six or more combined severe hail and wind reports
80%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 10, 2:33 PM CDTSevere Thunderstorm WarningFWDCollin, Denton57 min
Apr 10, 2:50 PM CDTSevere Thunderstorm WarningFWDFannin, Lamar55 min
Apr 10, 2:59 PM CDTSevere Thunderstorm WarningFWDJohnson61 min
Apr 10, 3:09 PM CDTSevere Thunderstorm WarningFWDMilam66 min
Apr 10, 3:10 PM CDTSevere Thunderstorm WarningSHVMcCurtain37 min
Apr 10, 3:19 PM CDTSevere Thunderstorm WarningSJTBrown, Coleman, McCulloch, San Saba41 min
Apr 10, 3:51 PM CDTSevere Thunderstorm WarningFWDEllis, Hill, Johnson54 min
Apr 10, 4:00 PM CDTSevere Thunderstorm WarningSJTMcCulloch, San Saba45 min
Apr 10, 4:07 PM CDTSevere Thunderstorm WarningFWDMilam, Robertson30 min
Apr 10, 4:28 PM CDTSevere Thunderstorm WarningFWDBosque, Hill62 min
Apr 10, 4:48 PM CDTSevere Thunderstorm WarningSHVLittle River, Sevier57 min
Apr 10, 5:04 PM CDTSevere Thunderstorm WarningFWDBosque56 min
Apr 10, 5:15 PM CDTSevere Thunderstorm WarningFWDDelta, Hopkins60 min
Apr 10, 5:48 PM CDTSevere Thunderstorm WarningFWDBosque20 min
Apr 10, 5:54 PM CDTSevere Thunderstorm WarningFWDEllis, Hill33 min
Apr 10, 6:47 PM CDTSevere Thunderstorm WarningSJTKimble, Mason58 min
Apr 10, 6:51 PM CDTSevere Thunderstorm WarningSHVBowie, Camp, Cass, Franklin, Morris, Red River and 3 more54 min
Apr 10, 7:13 PM CDTSevere Thunderstorm WarningSHVGregg, Rusk, Smith47 min
Apr 10, 7:18 PM CDTSevere Thunderstorm WarningFWDBosque42 min
Apr 10, 7:19 PM CDTFlash Flood WarningFWDHopkins, Hunt2 hr
Apr 10, 7:21 PM CDTTornado WarningSHVGregg, Rusk, Smith24 min
Apr 10, 7:36 PM CDTSevere Thunderstorm WarningSHVBossier, Claiborne, Webster54 min
Apr 10, 7:39 PM CDTSevere Thunderstorm WarningSHVMcCurtain66 min
Apr 10, 7:41 PM CDTTornado WarningSHVBossier, Webster34 min
Apr 10, 7:45 PM CDTTornado WarningSHVGregg, Rusk30 min
Apr 10, 7:49 PM CDTSevere Thunderstorm WarningSHVBowie, Cass, Morris, Titus56 min
Apr 10, 7:50 PM CDTFlash Flood WarningFWDBosque3 hr
Apr 10, 7:54 PM CDTSevere Thunderstorm WarningSJTCrockett66 min
Apr 10, 8:11 PM CDTSevere Thunderstorm WarningSHVGregg, Harrison, Panola, Rusk49 min
Apr 10, 8:11 PM CDTSevere Thunderstorm WarningSJTMason49 min
Apr 10, 8:13 PM CDTSevere Thunderstorm WarningFWDCoryell62 min
Apr 10, 8:16 PM CDTTornado WarningSHVGregg, Harrison, Rusk29 min
Apr 10, 8:24 PM CDTSevere Thunderstorm WarningFWDBosque, Hill, McLennan66 min
Apr 10, 8:46 PM CDTSevere Thunderstorm WarningSHVBowie, Camp, Cass, Morris, Titus44 min
Apr 10, 8:50 PM CDTSevere Thunderstorm WarningEWXLlano55 min
Apr 10, 8:56 PM CDTSevere Thunderstorm WarningSJTMason49 min
Apr 10, 8:59 PM CDTSevere Thunderstorm WarningFWDCoryell61 min
Apr 10, 8:59 PM CDTSevere Thunderstorm WarningSJTCrockett61 min
Apr 10, 9:00 PM CDTFlash Flood WarningFWDHill, McLennan3 hr
Apr 10, 9:11 PM CDTFlash Flood WarningSJTCrockett5 hr
Apr 10, 9:17 PM CDTSevere Thunderstorm WarningSHVUpshur, Wood58 min
Apr 10, 9:20 PM CDTSevere Thunderstorm WarningSHVGregg, Harrison, Panola, Rusk40 min
Apr 10, 9:27 PM CDTSevere Thunderstorm WarningFWDHill, Limestone, McLennan63 min
Apr 10, 9:29 PM CDTFlash Flood WarningSJTKimble, Mason3 hr
Apr 10, 9:35 PM CDTSevere Thunderstorm WarningEWXVal Verde70 min
Apr 10, 9:43 PM CDTSevere Thunderstorm WarningEWXLlano62 min
Apr 10, 9:58 PM CDTSevere Thunderstorm WarningFWDHill, Limestone, McLennan62 min
Apr 10, 9:59 PM CDTSevere Thunderstorm WarningSJTCrockett46 min
Apr 10, 10:11 PM CDTSevere Thunderstorm WarningSHVGregg, Harrison, Marion, Upshur35 min
Apr 10, 10:12 PM CDTSevere Thunderstorm WarningSJTMason63 min
Apr 10, 10:25 PM CDTTornado WarningFWDMcLennan35 min
Apr 10, 10:32 PM CDTSevere Thunderstorm WarningFWDCollin43 min
Apr 10, 10:34 PM CDTSevere Thunderstorm WarningFWDFalls, Limestone56 min
Apr 10, 10:41 PM CDTSevere Thunderstorm WarningEWXVal Verde64 min
Apr 10, 10:43 PM CDTSevere Thunderstorm WarningFWDBell, Coryell62 min
Apr 10, 10:45 PM CDTSevere Thunderstorm WarningEWXLlano45 min
Apr 10, 10:50 PM CDTFlash Flood WarningEWXLlano3 hr
Apr 10, 10:51 PM CDTSevere Thunderstorm WarningSJTSan Saba38 min
Apr 10, 10:58 PM CDTSevere Thunderstorm WarningFWDLimestone17 min
Apr 10, 10:59 PM CDTSevere Thunderstorm WarningFWDCollin, Fannin, Hunt61 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 12:00Z, 7.4 hours before the alert went out and 167 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 12:00Z on 2017-04-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 784 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 12:00Z on 2017-04-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 313 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
784 J/kg
Mixed-layer CIN
-234 J/kg
Mixed-layer LCL
738 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
313 m²/s²
0-3 km storm-relative helicity
344 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.2

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 10, 5:43 PM CDTMesoscale DiscussionSPCMarion, Newton2 hr
Apr 10, 6:51 PM CDTMesoscale DiscussionSPCClark, Columbia, Hempstead, Howard, Lafayette, Little River and 5 more84 min
Apr 10, 12:17 PM CDTMesoscale DiscussionSPCBryan, Choctaw2 hr

Nearby

Severe Thunderstorm Watches in Texas, 2017Severe Thunderstorm Watches in Arkansas, 2017Severe Thunderstorm Watches in Louisiana, 2017Every severe thunderstorm watch in 2017

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.