Alert archive / Oklahoma / Severe Thunderstorm Watches in 2014

Severe Thunderstorm Watch 258

June 7, 201424 counties in Oklahoma; 12 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Jun 7, 2014, 8:14 PM CDT for 24 counties in Oklahoma; 12 counties in Texas. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued
Jun 7, 2014, 8:14 PM CDT (01:14 UTC)
Expired
Jun 8, 2014, 4:00 AM CDT
In force
8 hr
Issued by
the Storm Prediction Center
Largest hail expected
2.5 in
Strongest gust expected
60 kt
All 36 counties

Beckham County, OK, Bryan County, OK, Caddo County, OK, Carter County, OK, Comanche County, OK, Cotton County, OK, Garvin County, OK, Grady County, OK, Greer County, OK, Harmon County, OK, Hughes County, OK, Jackson County, OK, Jefferson County, OK, Johnston County, OK, Kiowa County, OK, Love County, OK, Marshall County, OK, Murray County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Cooke County, TX, Fannin County, TX, Foard County, TX, Grayson County, TX, Hardeman County, TX, Knox County, TX, Montague County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 57 km from the middle of the area, began a volume at 01:18 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
50%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
80%
One or more hailstones of 2 inches or more
40%
Six or more combined severe hail and wind reports
95%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 7, 8:15 PM CDTSevere Thunderstorm WarningOUNCarter, Cotton, Jefferson, Love45 min
Jun 7, 8:38 PM CDTSevere Thunderstorm WarningOUNCarter, Garvin, Murray, Stephens52 min
Jun 7, 8:58 PM CDTSevere Thunderstorm WarningOUNLove46 min
Jun 7, 9:24 PM CDTSevere Thunderstorm WarningOUNGarvin51 min
Jun 7, 9:29 PM CDTSevere Thunderstorm WarningOUNCarter, Murray46 min
Jun 7, 9:33 PM CDTSevere Thunderstorm WarningOUNComanche, Grady, Stephens31 min
Jun 7, 10:14 PM CDTSevere Thunderstorm WarningOUNCleveland, Garvin, McClain, Pontotoc, Pottawatomie28 min
Jun 7, 10:15 PM CDTSevere Thunderstorm WarningOUNCarter, Johnston, Murray45 min
Jun 7, 10:42 PM CDTSevere Thunderstorm WarningOUNHarmon48 min
Jun 7, 10:58 PM CDTSevere Thunderstorm WarningOUNJohnston35 min
Jun 7, 11:15 PM CDTSevere Thunderstorm WarningOUNJackson45 min
Jun 7, 11:30 PM CDTSevere Thunderstorm WarningOUNHughes, Seminole45 min
Jun 7, 11:59 PM CDTSevere Thunderstorm WarningOUNJackson, Tillman46 min
Jun 8, 12:41 AM CDTSevere Thunderstorm WarningOUNComanche, Cotton, Jackson, Kiowa, Tillman49 min
Jun 8, 1:01 AM CDTFlash Flood WarningOUNHarmon, Jackson, Kiowa, Tillman3 hr
Jun 8, 1:30 AM CDTSevere Thunderstorm WarningOUNComanche, Cotton, Kiowa, Tillman45 min
Jun 8, 3:38 AM CDTFlash Flood WarningOUNGrady2 hr

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 00:00Z, 1.2 hours before the alert went out and 123 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 00:00Z on 2014-06-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 329 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 00:00Z on 2014-06-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 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
329 J/kg
Mixed-layer CIN
-313 J/kg
Mixed-layer LCL
1610 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
78 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.3

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 7, 7:06 PM CDTMesoscale DiscussionSPCCaddo, Carter, Coal, Comanche, Cotton, Garvin and 14 more2 hr
Jun 7, 9:50 PM CDTMesoscale DiscussionSPCBeckham, Harmon85 min
Jun 7, 9:55 PM CDTMesoscale DiscussionSPCAtoka, Choctaw, Haskell, Latimer, LeFlore, McCurtain and 4 more2 hr
Jun 8, 2:02 AM CDTMesoscale DiscussionSPCAtoka, Caddo, Carter, Cleveland, Coal, Comanche and 20 more118 min
Jun 8, 2:37 PM CDTMesoscale DiscussionSPCCimarron53 min
Jun 8, 2:55 PM CDTTornado WatchSPCCimarron8 hr
Jun 8, 5:25 PM CDTMesoscale DiscussionSPCCimarron, Texas2 hr
Jun 7, 11:43 PM CDTMesoscale DiscussionSPCAndrews, Borden, Dawson, Gaines, Howard, Martin and 2 more92 min
Jun 8, 10:32 AM CDTMesoscale DiscussionSPCBorden, Coke, Crosby, Dawson, Fisher, Gaines and 16 more118 min
Jun 8, 1:39 PM CDTMesoscale DiscussionSPCBowie, Camp, Cass, Franklin, Gregg, Harrison and 10 more2 hr
Jun 8, 2:19 PM CDTSevere Thunderstorm WatchSPCBowie, Cass, Harrison, Marion, Panola, Sabine and 2 more7 hr
Jun 8, 2:43 PM CDTMesoscale DiscussionSPCAndrews, Coke, Concho, Crane, Crockett, Ector and 27 more3 hr
Jun 8, 3:37 PM CDTMesoscale DiscussionSPCCass, Harrison, Marion, Panola, Shelby83 min
Jun 8, 5:09 PM CDTTornado WatchSPCAndrews, Brewster, Cochran, Crane, Culberson, Dawson and 15 more8 hr
Jun 8, 6:34 PM CDTMesoscale DiscussionSPCBosque, Brewster, Concho, Coryell, Crockett, Hamilton and 14 more86 min

Nearby

Severe Thunderstorm Watches in Oklahoma, 2014Severe 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.