Alert archive / Texas / Severe Thunderstorm Watches in 2014

Severe Thunderstorm Watch 85

April 21, 201461 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Apr 21, 2014, 2:52 PM CDT for 61 counties in Texas. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Apr 21, 2014, 2:52 PM CDT (19:52 UTC)
Expired
Apr 21, 2014, 10:00 PM CDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 61 counties

Anderson County, TX, Bell County, TX, Blanco County, TX, Bosque County, TX, Burnet County, TX, Camp County, TX, Cherokee County, TX, Collin County, TX, Comal County, TX, Cooke County, TX, Coryell County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Ellis County, TX, Falls County, TX, Fannin County, TX, Franklin County, TX, Freestone County, TX, Gillespie County, TX, Grayson County, TX, Hamilton County, TX, Hays County, TX, Henderson County, TX, Hill County, TX, Hood County, TX, Hopkins 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, Leon County, TX, Limestone County, TX, Llano County, TX, Mason County, TX, McCulloch County, TX, McLennan County, TX, Menard County, TX, Milam County, TX, Mills County, TX, Navarro County, TX, Parker County, TX, Rains County, TX, Red River County, TX, Robertson County, TX, Rockwall County, TX, San Saba County, TX, Smith County, TX, Somervell County, TX, Tarrant County, TX, Titus County, TX, Travis County, TX, Upshur County, TX, Van Zandt County, TX, Williamson County, TX, Wise County, TX, Wood County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 30 km from the middle of the area, began a volume at 19:54 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
2%
Ten or more severe wind reports
30%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
50%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
80%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 21, 4:12 PM CDTSevere Thunderstorm WarningSJTSan Saba33 min
Apr 21, 4:17 PM CDTSevere Thunderstorm WarningEWXBurnet, Llano43 min
Apr 21, 4:18 PM CDTSevere Thunderstorm WarningSJTMason, San Saba27 min
Apr 21, 4:21 PM CDTSevere Thunderstorm WarningFWDBell, Coryell, Lampasas54 min
Apr 21, 4:43 PM CDTSevere Thunderstorm WarningSJTMason32 min
Apr 21, 4:48 PM CDTSevere Thunderstorm WarningFWDCoryell57 min
Apr 21, 5:01 PM CDTSevere Thunderstorm WarningEWXBlanco, Burnet, Llano59 min
Apr 21, 5:01 PM CDTSevere Thunderstorm WarningSJTSan Saba44 min
Apr 21, 5:05 PM CDTSevere Thunderstorm WarningFWDEllis55 min
Apr 21, 5:11 PM CDTSevere Thunderstorm WarningEWXLlano49 min
Apr 21, 5:18 PM CDTSevere Thunderstorm WarningFWDBosque57 min
Apr 21, 5:20 PM CDTSevere Thunderstorm WarningSJTMason40 min
Apr 21, 5:31 PM CDTSevere Thunderstorm WarningEWXLlano29 min
Apr 21, 5:37 PM CDTSevere Thunderstorm WarningFWDDelta, Hopkins, Lamar53 min
Apr 21, 5:54 PM CDTSevere Thunderstorm WarningSJTMason66 min
Apr 21, 5:56 PM CDTSevere Thunderstorm WarningFWDEllis, Navarro64 min
Apr 21, 5:58 PM CDTSevere Thunderstorm WarningEWXGillespie, Llano62 min
Apr 21, 6:02 PM CDTSevere Thunderstorm WarningFWDDelta, Hopkins, Hunt, Rains58 min
Apr 21, 6:04 PM CDTSevere Thunderstorm WarningFWDBell, Coryell, Lampasas56 min
Apr 21, 6:29 PM CDTSevere Thunderstorm WarningEWXGillespie, Llano61 min
Apr 21, 6:37 PM CDTSevere Thunderstorm WarningFWDBosque, McLennan53 min
Apr 21, 6:39 PM CDTSevere Thunderstorm WarningFWDEllis51 min
Apr 21, 6:51 PM CDTSevere Thunderstorm WarningFWDCoryell54 min
Apr 21, 7:04 PM CDTSevere Thunderstorm WarningFWDEllis, Hill, Johnson26 min
Apr 21, 7:08 PM CDTSevere Thunderstorm WarningEWXBlanco, Gillespie, Kendall52 min
Apr 21, 7:14 PM CDTSevere Thunderstorm WarningFWDHunt, Rains, Rockwall46 min
Apr 21, 7:15 PM CDTSevere Thunderstorm WarningSJTMcCulloch, Mason60 min
Apr 21, 7:24 PM CDTSevere Thunderstorm WarningFWDEllis, Hill66 min
Apr 21, 7:31 PM CDTSevere Thunderstorm WarningEWXGillespie, Kendall, Kerr59 min
Apr 21, 8:07 PM CDTSevere Thunderstorm WarningSJTKimble53 min
Apr 21, 8:13 PM CDTSevere Thunderstorm WarningSJTMcCulloch, Mason62 min
Apr 21, 8:25 PM CDTSevere Thunderstorm WarningFWDKaufman65 min
Apr 21, 8:29 PM CDTSevere Thunderstorm WarningEWXGillespie, Kendall, Kerr61 min
Apr 21, 9:26 PM CDTSevere Thunderstorm WarningEWXKerr34 min
Apr 21, 9:28 PM CDTSevere Thunderstorm WarningEWXKendall32 min
Apr 21, 9:55 PM CDTSevere Thunderstorm WarningFWDHenderson50 min
Apr 21, 9:56 PM CDTSevere Thunderstorm WarningEWXKerr64 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, 7.9 hours before the alert went out and 52 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 2014-04-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 113 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 2014-04-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 206 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
113 J/kg
Mixed-layer CIN
-117 J/kg
Mixed-layer LCL
648 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
206 m²/s²
0-3 km storm-relative helicity
201 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.2

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 20, 10:18 PM CDTMesoscale DiscussionSPCArcher, Baylor, Clay, Haskell, Knox, Stonewall and 4 more87 min
Apr 21, 2:25 PM CDTMesoscale DiscussionSPCBell, Bosque, Brown, Coleman, Collin, Comanche and 30 more2 hr
Apr 21, 5:09 PM CDTMesoscale DiscussionSPCBandera, Bell, Blanco, Burnet, Comal, Coryell and 15 more96 min

Nearby

Severe Thunderstorm Watches in Texas, 2014Every severe thunderstorm watch in 2014

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.