Alert archive / Arkansas / Tornado Watches in 2008

Tornado Watch 190

April 10, 20084 states

The Storm Prediction Center issued this tornado watch at Apr 10, 2008, 9:51 AM CDT for 4 states. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: Apr 10, 2008, 9:51 AM CDT (14:51 UTC)
Expired: Apr 10, 2008, 5:00 PM CDT
In force: 7 hr
Issued by: the Storm Prediction Center
Largest hail expected: 1.5 in
Strongest gust expected: 70 kt

All 61 counties

Clay County, AR, Cleburne County, AR, Conway County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Faulkner County, AR, Fulton County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Lawrence County, AR, Lee County, AR, Mississippi County, AR, Perry County, AR, Phillips County, AR, Poinsett County, AR, Randolph County, AR, Sharp County, AR, St. Francis County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Alexander County, IL, Gallatin County, IL, Hardin County, IL, Jackson County, IL, Johnson County, IL, Massac County, IL, Pope County, IL, Pulaski County, IL, Saline County, IL, Union County, IL, Williamson County, IL, Ballard County, KY, Carlisle County, KY, Crittenden County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Livingston County, KY, McCracken County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Dunklin County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Oregon County, MO, Pemiscot County, MO, Perry County, MO, Ripley County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Scott County, MO, Stoddard County, MO, Wayne County, MO

The radar

The Memphis radar (KNQA), 115 km from the middle of the area, began a volume at 14:52 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: 40%
One or more EF2 to EF5 tornadoes: 20%
Ten or more severe wind reports: 50%
One or more gusts of 65 knots or more: 30%
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

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

Issued	Product	Office	Counties	Lasted
Apr 10, 11:02 AM CDT	Flash Flood Warning	LSX	Iron, Madison, Reynolds, Sainte Genevieve, Saint Francois	3 hr
Apr 10, 11:31 AM CDT	Flash Flood Warning	LZK	Grant, Jefferson, Lonoke, Prairie, Pulaski, Saline and 1 more	2 hr
Apr 10, 11:54 AM CDT	Severe Thunderstorm Warning	LZK	Independence, Jackson, Prairie, White, Woodruff	51 min
Apr 10, 1:17 PM CDT	Flash Flood Warning	LZK	Independence, Jackson, White, Woodruff	3 hr
Apr 10, 1:37 PM CDT	Severe Thunderstorm Warning	LZK	Jackson, Monroe, Prairie, White, Woodruff	38 min
Apr 10, 2:15 PM CDT	Severe Thunderstorm Warning	LZK	Woodruff	20 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

Little Rock, AR (KLZK), launched 12:00Z, 2.9 hours before the alert went out and 149 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: 328 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 566 m above ground
0-6 km bulk shear: 73 kt
0-1 km storm-relative helicity: 696 m²/s²
0-3 km storm-relative helicity: 979 m²/s²
Significant tornado parameter: 2.1
Supercell composite: 11.4

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 9, 7:28 PM CDT	Mesoscale Discussion	SPC	Crawford, Franklin, Hempstead, Howard, Johnson, Little River and 8 more	62 min
Apr 9, 8:10 PM CDT	Tornado Watch	SPC	Hempstead, Howard, Johnson, Little River, Logan, Montgomery and 6 more	6 hr
Apr 9, 10:40 PM CDT	Tornado Watch	SPC	Crawford, Franklin, Sebastian	7 hr
Apr 10, 1:45 AM CDT	Tornado Watch	SPC	Baxter, Boone, Cleburne, Conway, Faulkner, Fulton and 16 more	8 hr
Apr 10, 3:00 AM CDT	Mesoscale Discussion	SPC	Clay, Craighead, Crittenden, Cross, Greene, Mississippi and 1 more	60 min
Apr 10, 3:28 AM CDT	Tornado Watch	SPC	Clay, Craighead, Crittenden, Cross, Greene, Lawrence and 4 more	7 hr
Apr 10, 3:54 AM CDT	Tornado Watch	SPC	Benton, Carroll, Crawford, Franklin, Hempstead, Howard and 10 more	8 hr
Apr 10, 5:55 AM CDT	Mesoscale Discussion	SPC	Crawford, Franklin, Howard, Johnson, Little River, Logan and 4 more	65 min
Apr 10, 8:32 AM CDT	Mesoscale Discussion	SPC	Ashley, Bradley, Calhoun, Clark, Cleveland, Columbia and 22 more	58 min
Apr 10, 8:42 AM CDT	Tornado Watch	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 19 more	7 hr
Apr 10, 9:27 AM CDT	Mesoscale Discussion	SPC	Clay, Cleburne, Conway, Craighead, Crittenden, Cross and 16 more	2 hr
Apr 10, 10:51 AM CDT	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Calhoun, Clay, Cleveland and 28 more	84 min
Apr 10, 1:41 PM CDT	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Calhoun, Clay, Cleveland and 20 more	2 hr
Apr 10, 11:16 AM CDT	Mesoscale Discussion	SPC	Champaign, Clark, Clay, Coles, Crawford, Cumberland and 25 more	2 hr
Apr 10, 4:55 PM CDT	Tornado Watch	SPC	Adams, Brown, Calhoun, Hancock, Henderson, McDonough and 3 more	5 hr
Apr 10, 5:03 PM CDT	Tornado Watch	SPC	Edwards, Franklin, Gallatin, Hamilton, Hardin, Jackson and 12 more	6 hr
Apr 10, 6:44 PM CDT	Mesoscale Discussion	SPC	Adams, Brown, Calhoun, Hancock, Henderson, McDonough and 5 more	61 min
Apr 10, 6:56 AM CDT	Mesoscale Discussion	SPC	Christian, Douglas, Greene, Howell, Laclede, Maries and 9 more	64 min
Apr 10, 7:44 AM CDT	Tornado Watch	SPC	Dent, Douglas, Howell, Oregon, Ozark, Shannon and 2 more	2 hr
Apr 10, 2:03 PM CDT	Mesoscale Discussion	SPC	Andrew, Barton, Bates, Benton, Buchanan, Caldwell and 21 more	117 min
Apr 10, 2:28 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Andrew, Atchison, Barton, Bates, Benton and 51 more	7 hr

Nearby

Tornado Watches in Arkansas, 2008 Tornado Watches in Missouri, 2008 Tornado Watches in Illinois, 2008 Every tornado 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.