Alert archive / Mississippi / Tornado Watches in 2010

Tornado Watch 25

March 10, 20104 states

The Storm Prediction Center issued this tornado watch at Mar 10, 2010, 7:24 PM CST for 4 states. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued: Mar 10, 2010, 7:24 PM CST (01:24 UTC)
Expired: Mar 11, 2010, 3:32 AM CST
In force: 8 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 62 counties

Bibb County, AL, Choctaw County, AL, Clarke County, AL, Dallas County, AL, Greene County, AL, Hale County, AL, Marengo County, AL, Monroe County, AL, Perry County, AL, Pickens County, AL, Sumter County, AL, Tuscaloosa County, AL, Washington County, AL, Wilcox County, AL, Ashley County, AR, Chicot County, AR, East Carroll Parish, LA, Franklin Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Richland Parish, LA, Tensas Parish, LA, West Carroll Parish, LA, Attala County, MS, Bolivar County, MS, Carroll County, MS, Choctaw County, MS, Claiborne County, MS, Clarke County, MS, Clay County, MS, Copiah County, MS, Covington County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jasper County, MS, Jones County, MS, Kemper County, MS, Lauderdale County, MS, Leake County, MS, Leflore County, MS, Lowndes County, MS, Madison County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Sunflower County, MS, Warren County, MS, Washington County, MS, Wayne County, MS, Webster County, MS, Winston County, MS, Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 102 km from the middle of the area, began a volume at 01:27 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: 30%
One or more gusts of 65 knots or more: 30%
Ten or more severe hail reports: 60%
One or more hailstones of 2 inches or more: 50%
Six or more combined severe hail and wind reports: 80%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Mar 10, 7:44 PM CST	Tornado Warning	MOB	Choctaw, Clarke, Washington	31 min
Mar 10, 7:49 PM CST	Tornado Warning	BMX	Greene, Sumter	9 min
Mar 10, 7:57 PM CST	Severe Thunderstorm Warning	BMX	Greene, Sumter	41 min
Mar 10, 8:03 PM CST	Severe Thunderstorm Warning	JAN	Ashley, Chicot	40 min
Mar 10, 8:16 PM CST	Severe Thunderstorm Warning	MOB	Clarke, Wilcox	32 min
Mar 10, 8:53 PM CST	Flash Flood Warning	JAN	Kemper	3 hr
Mar 10, 9:48 PM CST	Tornado Warning	MOB	Conecuh, Monroe	30 min
Mar 10, 10:52 PM CST	Severe Thunderstorm Warning	JAN	Ashley	53 min
Mar 10, 11:37 PM CST	Severe Thunderstorm Warning	JAN	Issaquena, Sharkey, Warren, Yazoo	68 min
Mar 11, 12:17 AM CST	Severe Thunderstorm Warning	JAN	Carroll, Holmes, Humphreys, Yazoo	58 min
Mar 11, 12:21 AM CST	Tornado Warning	JAN	Claiborne, Hinds, Warren	54 min
Mar 11, 12:43 AM CST	Severe Thunderstorm Warning	JAN	Hinds, Madison, Warren, Yazoo	47 min
Mar 11, 1:24 AM CST	Severe Thunderstorm Warning	JAN	Attala, Holmes, Leake, Madison, Yazoo	51 min
Mar 11, 1:43 AM CST	Severe Thunderstorm Warning	JAN	Hinds, Madison, Rankin	62 min
Mar 11, 2:56 AM CST	Tornado Warning	JAN	Scott	38 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

Jackson, MS (KJAN), launched 00:00Z, 1.4 hours before the alert went out and 107 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: 1268 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 1282 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 183 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.9

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 10, 7:36 PM CST	Mesoscale Discussion	SPC	Baldwin, Mobile	54 min
Mar 10, 10:23 PM CST	Mesoscale Discussion	SPC	Choctaw, Clarke, Greene, Hale, Marengo, Pickens and 1 more	67 min
Mar 11, 4:36 AM CST	Mesoscale Discussion	SPC	Choctaw, Colbert, Cullman, Fayette, Franklin, Greene and 12 more	114 min
Mar 10, 6:54 PM CST	Mesoscale Discussion	SPC	Clay, Craighead, Crittenden, Cross, Greene, Jackson and 9 more	96 min
Mar 10, 7:48 PM CST	Tornado Watch	SPC	Arkansas, Clay, Cleburne, Craighead, Crittenden, Cross and 23 more	6 hr
Mar 10, 8:58 PM CST	Mesoscale Discussion	SPC	Calhoun, Clark, Columbia, Conway, Dallas, Faulkner and 10 more	62 min
Mar 10, 11:08 PM CST	Mesoscale Discussion	SPC	Arkansas, Clay, Craighead, Crittenden, Cross, Greene and 12 more	97 min
Mar 10, 7:46 PM CST	Tornado Watch	SPC	Ascension, Assumption, East Baton Rouge, East Feliciana, Iberville, Jefferson and 16 more	4 hr
Mar 11, 4:54 PM CST	Mesoscale Discussion	SPC	Allen, Avoyelles, Beauregard, Caldwell, Catahoula, Concordia and 14 more	66 min
Mar 11, 1:21 AM CST	Mesoscale Discussion	SPC	Alcorn, Attala, Benton, Calhoun, Carroll, Chickasaw and 44 more	54 min
Mar 11, 1:42 AM CST	Tornado Watch	SPC	Alcorn, Attala, Benton, Calhoun, Carroll, Chickasaw and 40 more	4 hr

Nearby

Tornado Watches in Mississippi, 2010 Tornado Watches in Alabama, 2010 Tornado Watches in Louisiana, 2010 Every tornado watch in 2010

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.