Alert archive / Oklahoma / Severe Thunderstorm Watches in 2007

Severe Thunderstorm Watch 366

June 7, 20077 counties in Arkansas; 49 counties in Oklahoma

The Storm Prediction Center issued this severe thunderstorm watch at Jun 7, 2007, 11:43 PM CDT for 7 counties in Arkansas; 49 counties in Oklahoma. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Jun 7, 2007, 11:43 PM CDT (04:43 UTC)
Expired
Jun 8, 2007, 7:00 AM CDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 56 counties

Benton County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Madison County, AR, Sebastian County, AR, Washington County, AR, Adair County, OK, Atoka County, OK, Bryan County, OK, Carter County, OK, Cherokee County, OK, Choctaw County, OK, Cleveland County, OK, Coal County, OK, Comanche County, OK, Cotton County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Garvin County, OK, Grady County, OK, Haskell County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Lincoln County, OK, Love County, OK, Marshall County, OK, Mayes County, OK, McClain County, OK, McIntosh County, OK, Murray County, OK, Muskogee County, OK, Nowata County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Payne County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Pushmataha County, OK, Rogers County, OK, Seminole County, OK, Sequoyah County, OK, Stephens County, OK, Tillman County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 71 km from the middle of the area, began a volume at 04:44 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
5%
Ten or more severe wind reports
50%
One or more gusts of 65 knots or more
20%
Ten or more severe hail reports
70%
One or more hailstones of 2 inches or more
20%
Six or more combined severe hail and wind reports
95%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 7, 11:46 PM CDTSevere Thunderstorm WarningTSAOttawa74 min
Jun 7, 11:47 PM CDTSevere Thunderstorm WarningOUNCarter, Murray43 min
Jun 8, 2:11 AM CDTSevere Thunderstorm WarningTSACreek, Tulsa50 min
Jun 8, 5:32 AM CDTSevere Thunderstorm WarningTSAMadison24 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 00:00Z, 4.7 hours before the alert went out and 128 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 2007-06-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3921 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 2007-06-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 182 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
3921 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
1334 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
182 m²/s²
0-3 km storm-relative helicity
210 m²/s²
Significant tornado parameter
2.7
Supercell composite
21.8

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 7, 11:12 PM CDTMesoscale DiscussionSPCBenton, Carroll, Washington93 min
Jun 8, 6:23 AM CDTMesoscale DiscussionSPCBaxter, Clay, Cleburne, Franklin, Fulton, Greene and 11 more67 min
Jun 8, 8:32 AM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Clark, Cleburne and 42 more58 min
Jun 8, 9:03 AM CDTSevere Thunderstorm WatchSPCArkansas, Bradley, Calhoun, Clark, Cleburne, Cleveland and 38 more7 hr
Jun 8, 2:12 PM CDTMesoscale DiscussionSPCUnion3 hr
Jun 8, 3:25 PM CDTMesoscale DiscussionSPCArkansas, Bradley, Calhoun, Clark, Cleveland, Dallas and 11 more95 min
Jun 7, 7:54 PM CDTMesoscale DiscussionSPCAudrain, Barton, Bates, Benton, Boone, Callaway and 27 more2 hr
Jun 7, 8:31 PM CDTTornado WatchSPCAdair, Audrain, Barton, Bates, Benton, Boone and 53 more7 hr
Jun 7, 11:26 PM CDTTornado WatchSPCBarry, Bollinger, Butler, Cape Girardeau, Carter, Christian and 36 more8 hr
Jun 8, 2:27 AM CDTMesoscale DiscussionSPCMcDonald63 min
Jun 7, 7:08 PM CDTMesoscale DiscussionSPCCarter, Cleveland, Cotton, Craig, Creek, Garvin and 26 more2 hr
Jun 7, 9:40 PM CDTMesoscale DiscussionSPCCarter, Cleveland, Coal, Cotton, Craig, Creek and 28 more65 min
Jun 8, 5:24 PM CDTMesoscale DiscussionSPCBrewster, Jeff Davis, Presidio2 hr
Jun 8, 6:36 PM CDTMesoscale DiscussionSPCAnderson, Bell, Burnet, Cherokee, Coryell, Falls and 19 more114 min

Nearby

Severe Thunderstorm Watches in Oklahoma, 2007Severe Thunderstorm Watches in Arkansas, 2007Every severe thunderstorm watch in 2007

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.