Alert archive / Oklahoma / Severe Thunderstorm Watches in 2008

Severe Thunderstorm Watch 7

January 7, 200810 counties in Kansas; 18 counties in Missouri; 25 counties in Oklahoma

The Storm Prediction Center issued this severe thunderstorm watch at Jan 7, 2008, 8:55 PM CST for 10 counties in Kansas; 18 counties in Missouri; 25 counties in Oklahoma. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued: Jan 7, 2008, 8:55 PM CST (02:55 UTC)
Expired: Jan 8, 2008, 5:00 AM CST
In force: 8 hr
Issued by: the Storm Prediction Center
Largest hail expected: 1.5 in
Strongest gust expected: 60 kt

All 53 counties

Allen County, KS, Bourbon County, KS, Chautauqua County, KS, Cherokee County, KS, Crawford County, KS, Labette County, KS, Linn County, KS, Montgomery County, KS, Neosho County, KS, Wilson County, KS, Barton County, MO, Bates County, MO, Carroll County, MO, Cass County, MO, Cedar County, MO, Chariton County, MO, Cooper County, MO, Henry County, MO, Howard County, MO, Jasper County, MO, Johnson County, MO, Lafayette County, MO, Macon County, MO, Pettis County, MO, Randolph County, MO, Saline County, MO, St. Clair County, MO, Vernon County, MO, Canadian County, OK, Cleveland County, OK, Coal County, OK, Craig County, OK, Creek County, OK, Hughes County, OK, Kay County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, Noble 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, Pontotoc County, OK, Pottawatomie County, OK, Rogers County, OK, Seminole County, OK, Tulsa County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 113 km from the middle of the area, began a volume at 02:55 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: 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: 10%
Six or more combined severe hail and wind reports: 70%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jan 7, 9:00 PM CST	Severe Thunderstorm Warning	TSA	Cherokee, Craig, Delaware, McIntosh, Mayes, Muskogee and 5 more	60 min
Jan 7, 9:08 PM CST	Severe Thunderstorm Warning	OUN	Pontotoc, Pottawatomie, Seminole	52 min
Jan 7, 9:12 PM CST	Severe Thunderstorm Warning	EAX	Henry, Johnson, Pettis, Saline	48 min
Jan 7, 9:21 PM CST	Tornado Warning	OUN	Garvin, Pontotoc	24 min
Jan 7, 9:37 PM CST	Tornado Warning	OUN	Seminole	23 min
Jan 7, 9:40 PM CST	Tornado Warning	TSA	Cherokee, McIntosh, Muskogee, Okmulgee, Wagoner	65 min
Jan 7, 9:54 PM CST	Flash Flood Warning	TSA	Okfuskee, Okmulgee	3 hr
Jan 7, 9:58 PM CST	Severe Thunderstorm Warning	TSA	McIntosh, Okfuskee, Okmulgee	62 min
Jan 7, 9:59 PM CST	Severe Thunderstorm Warning	OUN	Hughes, Seminole	46 min
Jan 7, 10:58 PM CST	Severe Thunderstorm Warning	TSA	Muskogee, Okmulgee	38 min
Jan 7, 11:11 PM CST	Tornado Warning	TSA	Muskogee, Okmulgee	34 min
Jan 7, 11:20 PM CST	Tornado Warning	TSA	Mayes, Rogers, Wagoner	55 min
Jan 7, 11:31 PM CST	Severe Thunderstorm Warning	OUN	Lincoln, Logan, Payne	44 min
Jan 7, 11:45 PM CST	Severe Thunderstorm Warning	OUN	Canadian, Oklahoma	45 min
Jan 7, 11:58 PM CST	Severe Thunderstorm Warning	OUN	Cleveland, Grady, McClain	32 min
Jan 8, 12:29 AM CST	Severe Thunderstorm Warning	OUN	Cleveland, Lincoln, Oklahoma	46 min
Jan 8, 12:59 AM CST	Severe Thunderstorm Warning	SGF	Crawford	25 min
Jan 8, 1:07 AM CST	Severe Thunderstorm Warning	SGF	Bourbon	53 min
Jan 8, 1:15 AM CST	Severe Thunderstorm Warning	TSA	Delaware, Mayes, Ottawa	60 min
Jan 8, 1:18 AM CST	Severe Thunderstorm Warning	EAX	Henry, Pettis	42 min
Jan 8, 1:28 AM CST	Tornado Warning	SGF	Vernon	28 min
Jan 8, 2:00 AM CST	Severe Thunderstorm Warning	SGF	Barry, Cedar, Dade, Jasper, Lawrence, McDonald and 1 more	60 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, 2.9 hours before the alert went out and 154 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: 765 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 955 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 281 m²/s²
0-3 km storm-relative helicity: 338 m²/s²
Significant tornado parameter: 1.7
Supercell composite: 7.2

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 7, 6:11 PM CST	Mesoscale Discussion	SPC	Adams, Brown, Pike, Schuyler	94 min
Jan 7, 6:57 PM CST	Mesoscale Discussion	SPC	Calhoun, Greene, Jersey, Madison, Monroe, Pike and 2 more	93 min
Jan 7, 7:03 PM CST	Mesoscale Discussion	SPC	Champaign, Clark, Coles, Crawford, Cumberland, Douglas and 4 more	117 min
Jan 7, 7:48 PM CST	Tornado Watch PDS	SPC	Bond, Calhoun, Clinton, Fayette, Greene, Jackson and 12 more	9 hr
Jan 7, 10:04 PM CST	Mesoscale Discussion	SPC	Calhoun	86 min
Jan 7, 10:12 PM CST	Mesoscale Discussion	SPC	Champaign, Christian, Clark, Coles, Cumberland, DeWitt and 12 more	2 hr
Jan 8, 11:27 AM CST	Mesoscale Discussion	SPC	Alexander, Gallatin, Hardin, Jackson, Johnson, Massac and 5 more	2 hr
Jan 8, 11:40 AM CST	Mesoscale Discussion	SPC	Jo Daviess	5 hr
Jan 8, 12:22 PM CST	Mesoscale Discussion	SPC	Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 10 more	83 min
Jan 8, 1:11 PM CST	Mesoscale Discussion	SPC	Gallatin, Hardin, Massac, Pope	2 hr
Jan 8, 1:26 PM CST	Tornado Watch	SPC	Gallatin, Hardin, Massac, Pope	8 hr
Jan 7, 8:25 PM CST	Mesoscale Discussion	SPC	Allen, Bourbon, Chautauqua, Cherokee, Crawford, Labette and 4 more	65 min
Jan 7, 11:18 PM CST	Mesoscale Discussion	SPC	Allen, Bourbon, Chautauqua, Cherokee, Crawford, Labette and 4 more	87 min
Jan 8, 3:44 AM CST	Mesoscale Discussion	SPC	Allen, Bourbon, Chautauqua, Cherokee, Crawford, Elk and 5 more	91 min
Jan 8, 2:02 AM CST	Mesoscale Discussion	SPC	Dent, Douglas, Shannon, Texas, Wright	118 min
Jan 8, 8:34 AM CST	Tornado Watch	SPC	Butler, Dunklin, Mississippi, New Madrid, Pemiscot, Ripley and 2 more	5 hr

Nearby

Severe Thunderstorm Watches in Oklahoma, 2008 Severe Thunderstorm Watches in Missouri, 2008 Severe Thunderstorm Watches in Kansas, 2008 Every severe thunderstorm watch in 2008

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.