Alert archive / Texas / Severe Thunderstorm Watches in 2017

Severe Thunderstorm Watch 191

May 3, 20175 counties in Arkansas; 44 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at May 3, 2017, 12:34 PM CDT for 5 counties in Arkansas; 44 counties in Texas. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
May 3, 2017, 12:34 PM CDT (17:34 UTC)
Expired
May 3, 2017, 6:01 PM CDT
In force
5 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 49 counties

Columbia County, AR, Hempstead County, AR, Lafayette County, AR, Miller County, AR, Nevada County, AR, Anderson County, TX, Bell County, TX, Bosque County, TX, Bowie County, TX, Camp County, TX, Cass County, TX, Cherokee County, TX, Collin County, TX, Coryell County, TX, Dallas County, TX, Delta County, TX, Ellis County, TX, Falls County, TX, Fannin County, TX, Franklin County, TX, Freestone County, TX, Gregg County, TX, Hamilton County, TX, Harrison County, TX, Henderson County, TX, Hill County, TX, Hopkins County, TX, Hunt County, TX, Johnson County, TX, Kaufman County, TX, Lamar County, TX, Leon County, TX, Limestone County, TX, Marion County, TX, McLennan County, TX, Milam County, TX, Morris County, TX, Navarro County, TX, Panola County, TX, Rains County, TX, Red River County, TX, Robertson County, TX, Rockwall County, TX, Rusk 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), 139 km from the middle of the area, began a volume at 17:35 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
50%
One or more gusts of 65 knots or more
20%
Ten or more severe hail reports
60%
One or more hailstones of 2 inches or more
40%
Six or more combined severe hail and wind reports
80%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 3, 1:00 PM CDTSevere Thunderstorm WarningFWDBosque38 min
May 3, 1:31 PM CDTSevere Thunderstorm WarningFWDEllis, Kaufman59 min
May 3, 1:32 PM CDTFlash Flood WarningSHVHempstead, Nevada3 hr
May 3, 2:08 PM CDTSevere Thunderstorm WarningFWDHenderson, Kaufman, Navarro67 min
May 3, 2:16 PM CDTSevere Thunderstorm WarningFWDHill, McLennan59 min
May 3, 2:19 PM CDTSevere Thunderstorm WarningSHVBowie, Franklin, Red River, Titus56 min
May 3, 2:27 PM CDTSevere Thunderstorm WarningFWDHenderson, Van Zandt63 min
May 3, 2:44 PM CDTSevere Thunderstorm WarningFWDLimestone, Navarro61 min
May 3, 2:58 PM CDTSevere Thunderstorm WarningFWDAnderson, Henderson47 min
May 3, 3:01 PM CDTSevere Thunderstorm WarningSHVCherokee, Smith59 min
May 3, 3:16 PM CDTSevere Thunderstorm WarningFWDLimestone59 min
May 3, 3:20 PM CDTSevere Thunderstorm WarningFWDRains, Van Zandt15 min
May 3, 3:35 PM CDTSevere Thunderstorm WarningFWDFreestone55 min
May 3, 3:40 PM CDTSevere Thunderstorm WarningSHVRusk65 min
May 3, 4:00 PM CDTSevere Thunderstorm WarningSHVCherokee, Nacogdoches, Rusk60 min
May 3, 4:12 PM CDTSevere Thunderstorm WarningFWDLeon63 min
May 3, 4:12 PM CDTSevere Thunderstorm WarningSHVGregg, Harrison, Panola, Rusk48 min
May 3, 4:14 PM CDTSevere Thunderstorm WarningFWDLeon, Limestone, Robertson61 min
May 3, 4:14 PM CDTFlash Flood WarningSHVCherokee, Rusk, Smith3 hr
May 3, 4:20 PM CDTFlash Flood WarningSHVColumbia, Hempstead, Lafayette, Miller, Nevada3 hr
May 3, 4:23 PM CDTTornado WarningSHVPanola, Shelby23 min
May 3, 4:35 PM CDTSevere Thunderstorm WarningSHVNacogdoches, Panola, Rusk, Shelby55 min
May 3, 4:40 PM CDTSevere Thunderstorm WarningFWDAnderson52 min
May 3, 4:45 PM CDTFlash Flood WarningSHVAngelina, Cherokee, Nacogdoches, Rusk, San Augustine, Shelby3 hr
May 3, 5:04 PM CDTSevere Thunderstorm WarningSHVAngelina, Cherokee, Nacogdoches, San Augustine, Shelby56 min
May 3, 5:28 PM CDTSevere Thunderstorm WarningFWDRobertson28 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, 5.6 hours before the alert went out and 137 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 2017-05-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2100 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 2017-05-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 157 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
2100 J/kg
Mixed-layer CIN
-222 J/kg
Mixed-layer LCL
684 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
157 m²/s²
0-3 km storm-relative helicity
238 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 3, 4:54 AM CDTMesoscale DiscussionSPCBenton, Washington96 min
May 3, 7:48 AM CDTMesoscale DiscussionSPCHempstead, Howard, Lafayette, Little River, Miller, Pike and 2 more117 min
May 3, 1:48 PM CDTMesoscale DiscussionSPCHempstead, Little River, Miller87 min
May 3, 3:59 PM CDTMesoscale DiscussionSPCLafayette, Miller91 min
May 3, 1:30 AM CDTMesoscale DiscussionSPCCollingsworth, Donley, Gray, Hemphill, Wheeler2 hr
May 3, 7:04 AM CDTMesoscale DiscussionSPCAngelina, Chambers, Hardin, Houston, Jasper, Jefferson and 12 more86 min
May 3, 7:32 AM CDTTornado WatchSPCAngelina, Chambers, Hardin, Jasper, Jefferson, Liberty and 10 more9 hr
May 3, 10:07 AM CDTMesoscale DiscussionSPCAngelina, Hardin, Jasper, Jefferson, Newton, Orange and 3 more83 min
May 3, 11:23 AM CDTMesoscale DiscussionSPCCoryell, Dallas, Ellis, Falls, Freestone, Henderson and 9 more2 hr
May 3, 1:58 PM CDTMesoscale DiscussionSPCAngelina, Chambers, Hardin, Jasper, Jefferson, Newton and 4 more62 min
May 3, 3:48 PM CDTMesoscale DiscussionSPCAngelina, Chambers, Hardin, Houston, Jasper, Jefferson and 12 more87 min
May 3, 5:00 PM CDTSevere Thunderstorm WatchSPCAngelina, Austin, Bastrop, Brazoria, Brazos, Burleson and 29 more7 hr

Nearby

Severe Thunderstorm Watches in Texas, 2017Severe Thunderstorm Watches in Arkansas, 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.