Alert archive / Texas / Severe Thunderstorm Watches in 2016

Severe Thunderstorm Watch 320

July 3, 201620 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Jul 3, 2016, 6:27 PM CDT for 20 counties in Texas. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jul 3, 2016, 6:27 PM CDT (23:27 UTC)
Expired
Jul 4, 2016, 12:42 AM CDT
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt

Counties Archer County, TX, Baylor County, TX, Clay County, TX, Cooke County, TX, Fisher County, TX, Haskell County, TX, Jack County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Montague County, TX, Palo Pinto County, TX, Shackelford County, TX, Stephens County, TX, Stonewall County, TX, Throckmorton County, TX, Wichita County, TX, Wise County, TX, Young County, TX

The radar

The Altus AFB radar (KFDR), 103 km from the middle of the area, began a volume at 23:26 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
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
30%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
50%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jul 3, 6:40 PM CDTSevere Thunderstorm WarningOUNClay23 min
Jul 3, 6:57 PM CDTSevere Thunderstorm WarningSJTJones48 min
Jul 3, 7:00 PM CDTSevere Thunderstorm WarningOUNArcher, Clay, Wichita45 min
Jul 3, 7:21 PM CDTSevere Thunderstorm WarningOUNClay39 min
Jul 3, 7:50 PM CDTSevere Thunderstorm WarningFWDMontague40 min
Jul 3, 7:55 PM CDTSevere Thunderstorm WarningOUNClay33 min
Jul 3, 8:15 PM CDTSevere Thunderstorm WarningOUNArcher, Clay45 min
Jul 3, 8:21 PM CDTSevere Thunderstorm WarningFWDJack54 min
Jul 3, 8:49 PM CDTSevere Thunderstorm WarningFWDJack, Young56 min
Jul 3, 10:40 PM CDTSevere Thunderstorm WarningFWDJack, Young65 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

Norman, OK (KOUN), launched 12:00Z, 11.5 hours before the alert went out and 262 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, Norman, OK at 12:00Z on 2016-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1279 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, Norman, OK at 12:00Z on 2016-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 194 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
1279 J/kg
Mixed-layer CIN
-47 J/kg
Mixed-layer LCL
859 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
194 m²/s²
0-3 km storm-relative helicity
241 m²/s²
Significant tornado parameter
1.3
Supercell composite
9.8

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 2, 9:20 PM CDTMesoscale DiscussionSPCAlfalfa, Beaver, Grant, Harper, Texas, Woods and 1 more85 min
Jul 3, 2:43 PM CDTMesoscale DiscussionSPCAtoka, Cherokee, Cleveland, Coal, Creek, Garvin and 24 more2 hr
Jul 3, 2:46 PM CDTMesoscale DiscussionSPCCimarron119 min
Jul 3, 3:17 PM CDTSevere Thunderstorm WatchSPCAdair, Atoka, Bryan, Caddo, Canadian, Carter and 45 more8 hr
Jul 3, 5:24 PM CDTMesoscale DiscussionSPCArcher, Clay, Jack, Montague, Shackelford, Throckmorton and 1 more3 hr

Nearby

Severe Thunderstorm Watches in Texas, 2016Every severe thunderstorm watch in 2016

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.