Alert archive / Oklahoma / Severe Thunderstorm Watches in 2007

Severe Thunderstorm Watch 320

June 1, 20077 counties in Arkansas; 14 counties in Missouri; 20 counties in Oklahoma

The Storm Prediction Center issued this severe thunderstorm watch at Jun 1, 2007, 1:14 AM CDT for 7 counties in Arkansas; 14 counties in Missouri; 20 counties in Oklahoma. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jun 1, 2007, 1:14 AM CDT (06:14 UTC)
Expired: Jun 1, 2007, 7:00 AM CDT
In force: 6 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 41 counties

Benton County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Madison County, AR, Sebastian County, AR, Washington County, AR, Barry County, MO, Barton County, MO, Cedar County, MO, Christian County, MO, Dade County, MO, Greene County, MO, Jasper County, MO, Lawrence County, MO, McDonald County, MO, Newton County, MO, Polk County, MO, Stone County, MO, Taney County, MO, Vernon County, MO, Adair County, OK, Cherokee County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Haskell County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Nowata County, OK, Okfuskee County, OK, Okmulgee County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Rogers County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 16 km from the middle of the area, began a volume at 06:15 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: 5%
One or more EF2 to EF5 tornadoes: 2%
Ten or more severe wind reports: 50%
One or more gusts of 65 knots or more: 50%
Ten or more severe hail reports: 30%
One or more hailstones of 2 inches or more: 20%
Six or more combined severe hail and wind reports: 95%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 1, 1:51 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	69 min
Jun 1, 2:53 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee, Tulsa, Washington	82 min
Jun 1, 3:07 AM CDT	Severe Thunderstorm Warning	TSA	Creek	38 min
Jun 1, 3:18 AM CDT	Severe Thunderstorm Warning	TSA	Nowata	72 min
Jun 1, 3:27 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Tulsa	78 min
Jun 1, 3:43 AM CDT	Severe Thunderstorm Warning	TSA	Rogers	62 min
Jun 1, 3:57 AM CDT	Severe Thunderstorm Warning	TSA	Craig	78 min
Jun 1, 4:29 AM CDT	Severe Thunderstorm Warning	SGF	Barton, Jasper, Vernon	76 min
Jun 1, 5:16 AM CDT	Severe Thunderstorm Warning	SGF	Newton	59 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

Springfield, MO (KSGF), launched 00:00Z, 6.2 hours before the alert went out and 161 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 210 J/kg
Mixed-layer CIN: -74 J/kg
Mixed-layer LCL: 1536 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: 107 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.

Issued	Product	Office	Counties	Lasted
Jun 1, 12:04 AM CDT	Mesoscale Discussion	SPC	Benton, Carroll, Crawford, Madison, Washington	116 min
Jun 1, 3:18 AM CDT	Mesoscale Discussion	SPC	Benton, Boone, Carroll, Crawford, Franklin, Madison and 2 more	87 min
Jun 1, 5:39 AM CDT	Mesoscale Discussion	SPC	Benton, Boone, Carroll, Crawford, Franklin, Johnson and 5 more	66 min
Jun 1, 5:15 PM CDT	Severe Thunderstorm Watch	SPC	Benton, Carroll, Madison, Washington	8 hr
May 31, 10:04 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Barton, Bourbon, Butler, Chase and 26 more	86 min
May 31, 10:24 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Anderson, Bourbon, Butler, Chase, Chautauqua and 22 more	7 hr
Jun 1, 1:42 AM CDT	Mesoscale Discussion	SPC	Chautauqua, Cowley, Elk, Labette, Montgomery, Neosho and 2 more	2 hr
Jun 1, 4:38 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Butler, Chautauqua, Coffey, Cowley and 7 more	67 min
Jun 1, 11:09 AM CDT	Mesoscale Discussion	SPC	Clark, Lewis, Marion, Pike, Ralls	2 hr
May 31, 7:52 PM CDT	Mesoscale Discussion	SPC	Greer, Harmon, Jackson	83 min
May 31, 9:07 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Beaver, Beckham, Blaine, Caddo, Canadian and 11 more	53 min
May 31, 9:38 PM CDT	Severe Thunderstorm Watch	SPC	Alfalfa, Beaver, Beckham, Blaine, Caddo, Canadian and 32 more	7 hr
Jun 1, 2:24 AM CDT	Mesoscale Discussion	SPC	Comanche, Cotton, Harmon, Jackson, Jefferson, Stephens and 1 more	66 min
Jun 1, 1:45 PM CDT	Mesoscale Discussion	SPC	Comanche, Cotton, Greer, Harmon, Jackson, Jefferson and 2 more	60 min
Jun 1, 2:03 PM CDT	Tornado Watch	SPC	Comanche, Cotton, Greer, Harmon, Jackson, Kiowa and 1 more	7 hr
Jun 1, 5:30 PM CDT	Mesoscale Discussion	SPC	Comanche, Cotton, Jackson, Tillman	60 min

Nearby

Severe Thunderstorm Watches in Oklahoma, 2007 Severe Thunderstorm Watches in Missouri, 2007 Severe Thunderstorm Watches in Arkansas, 2007 Every 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.