Alert archive / Mississippi / Tornado Watches in 2010
Tornado Watch 28
The Storm Prediction Center issued this tornado watch at Mar 11, 2010, 1:42 AM CST for 46 counties in Mississippi; 17 counties in Tennessee. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 11, 2010, 1:42 AM CST (07:42 UTC)
- Expired
- Mar 11, 2010, 5:35 AM CST
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 63 counties
Alcorn County, MS, Attala County, MS, Benton County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Clarke County, MS, Clay County, MS, Copiah County, MS, Covington County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Itawamba County, MS, Jasper County, MS, Jones County, MS, Kemper County, MS, Lafayette County, MS, Lauderdale County, MS, Leake County, MS, Lee County, MS, Lowndes County, MS, Madison County, MS, Marshall County, MS, Monroe County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Webster County, MS, Winston County, MS, Yalobusha County, MS, Yazoo County, MS, Carroll County, TN, Chester County, TN, Crockett County, TN, Decatur County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Lake County, TN, Madison County, TN, McNairy County, TN, Obion County, TN, Weakley County, TN
The radar
The Memphis radar (KNQA), 98 km from the middle of the area, began a volume at 07:42 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
- 30%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 11, 1:43 AM CST | Severe Thunderstorm Warning | JAN | Hinds, Madison, Rankin | 62 min |
| Mar 11, 2:16 AM CST | Severe Thunderstorm Warning | MEG | Alcorn, Benton, Marshall, Tippah | 48 min |
| Mar 11, 2:56 AM CST | Tornado Warning | JAN | Scott | 38 min |
| Mar 11, 3:57 AM CST | Severe Thunderstorm Warning | JAN | Newton, Scott | 43 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 00:00Z, 7.7 hours before the alert went out and 68 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.
- Mixed-layer CAPE
- 1389 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1112 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 99 m²/s²
- 0-3 km storm-relative helicity
- 193 m²/s²
- Significant tornado parameter
- 1.4
- Supercell composite
- 6.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 10, 6:54 PM CST | Mesoscale Discussion | SPC | Coahoma, DeSoto, Marshall, Panola, Quitman, Tate and 1 more | 96 min |
| Mar 10, 7:24 PM CST | Tornado Watch | SPC | Attala, Bolivar, Carroll, Choctaw, Claiborne, Clarke and 33 more | 8 hr |
| Mar 10, 7:36 PM CST | Mesoscale Discussion | SPC | George, Hancock, Harrison, Jackson, Stone | 54 min |
| Mar 10, 7:46 PM CST | Tornado Watch | SPC | Amite, Hancock, Harrison, Jackson, Pearl River, Pike and 2 more | 4 hr |
| Mar 10, 7:48 PM CST | Tornado Watch | SPC | Coahoma, DeSoto, Lafayette, Marshall, Panola, Quitman and 4 more | 6 hr |
| Mar 10, 10:23 PM CST | Mesoscale Discussion | SPC | Attala, Carroll, Choctaw, Clarke, Hinds, Holmes and 22 more | 67 min |
| Mar 10, 11:08 PM CST | Mesoscale Discussion | SPC | Coahoma, DeSoto, Tate, Tunica | 97 min |
| Mar 11, 1:21 AM CST | Mesoscale Discussion | SPC | Alcorn, Attala, Benton, Calhoun, Carroll, Chickasaw and 44 more | 54 min |
| Mar 11, 4:36 AM CST | Mesoscale Discussion | SPC | Clarke, Covington, Jasper, Jones, Kemper, Lauderdale and 5 more | 114 min |
| Mar 11, 4:54 PM CST | Mesoscale Discussion | SPC | Adams, Amite, Claiborne, Copiah, Franklin, Jefferson and 4 more | 66 min |
| Mar 10, 7:13 PM CST | Mesoscale Discussion | SPC | Barry, Barton, Bates, Camden, Cedar, Christian and 18 more | 62 min |
Nearby
Tornado Watches in Mississippi, 2010Tornado Watches in Tennessee, 2010Every 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.