Alert archive / Mississippi / Tornado Watches in 2009
Tornado Watch 127
The Storm Prediction Center issued this tornado watch at Apr 9, 2009, 10:48 PM CDT for 5 states. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 9, 2009, 10:48 PM CDT (03:48 UTC)
- Expired
- Apr 10, 2009, 3:06 AM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 56 counties
Ashley County, AR, Chicot County, AR, Clay County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Greene County, AR, Lawrence County, AR, Lee County, AR, Mississippi County, AR, Phillips County, AR, Poinsett County, AR, Randolph County, AR, St. Francis 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, Dunklin County, MO, Pemiscot County, MO, Bolivar County, MS, Carroll County, MS, Coahoma County, MS, DeSoto County, MS, Grenada County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Lafayette County, MS, Leflore County, MS, Marshall County, MS, Montgomery County, MS, Panola County, MS, Quitman County, MS, Sharkey County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tunica County, MS, Warren County, MS, Washington County, MS, Yalobusha County, MS, Yazoo County, MS, Crockett County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Haywood County, TN, Lake County, TN, Lauderdale County, TN, Obion County, TN, Shelby County, TN, Tipton County, TN
The radar
The Memphis radar (KNQA), 97 km from the middle of the area, began a volume at 03:50 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
- 40%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
23 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 10:58 PM CDT | Severe Thunderstorm Warning | MEG | Clay, Randolph | 47 min |
| Apr 9, 11:08 PM CDT | Tornado Warning | JAN | Ashley | 67 min |
| Apr 9, 11:27 PM CDT | Severe Thunderstorm Warning | MEG | Clay, Craighead, Greene, Mississippi, Poinsett | 48 min |
| Apr 9, 11:40 PM CDT | Severe Thunderstorm Warning | MEG | Clay | 34 min |
| Apr 9, 11:42 PM CDT | Severe Thunderstorm Warning | MEG | Crittenden, Cross, Mississippi, Poinsett | 48 min |
| Apr 9, 11:58 PM CDT | Severe Thunderstorm Warning | MEG | Mississippi | 47 min |
| Apr 10, 12:03 AM CDT | Tornado Warning | JAN | Chicot | 57 min |
| Apr 10, 12:13 AM CDT | Severe Thunderstorm Warning | MEG | Craighead, Mississippi | 32 min |
| Apr 10, 12:19 AM CDT | Severe Thunderstorm Warning | MEG | Crittenden, Mississippi | 41 min |
| Apr 10, 12:28 AM CDT | Severe Thunderstorm Warning | MEG | Crittenden, Cross, Mississippi, Poinsett | 32 min |
| Apr 10, 12:31 AM CDT | Tornado Warning | JAN | Bolivar, Leflore, Sunflower | 59 min |
| Apr 10, 12:39 AM CDT | Tornado Warning | JAN | Richland | 36 min |
| Apr 10, 12:43 AM CDT | Severe Thunderstorm Warning | MEG | Mississippi | 49 min |
| Apr 10, 12:44 AM CDT | Tornado Warning | JAN | Humphreys, Sharkey, Sunflower, Washington | 61 min |
| Apr 10, 12:58 AM CDT | Severe Thunderstorm Warning | MEG | Crittenden, Mississippi | 37 min |
| Apr 10, 1:02 AM CDT | Severe Thunderstorm Warning | MEG | Benton, Lafayette, Marshall, Panola, Tate, Union | 58 min |
| Apr 10, 1:10 AM CDT | Severe Thunderstorm Warning | MEG | Carroll, Crockett, Dyer, Gibson, Weakley | 28 min |
| Apr 10, 1:12 AM CDT | Tornado Warning | JAN | East Carroll, Franklin, Madison, Richland | 48 min |
| Apr 10, 1:19 AM CDT | Severe Thunderstorm Warning | JAN | Carroll, Leflore | 41 min |
| Apr 10, 1:25 AM CDT | Severe Thunderstorm Warning | JAN | Grenada | 37 min |
| Apr 10, 1:28 AM CDT | Severe Thunderstorm Warning | JAN | Carroll, Montgomery | 47 min |
| Apr 10, 1:51 AM CDT | Tornado Warning | JAN | East Carroll, Madison | 39 min |
| Apr 10, 2:26 AM CDT | Tornado Warning | JAN | Madison | 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 00:00Z, 3.8 hours before the alert went out and 69 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
- 366 J/kg
- Mixed-layer CIN
- -86 J/kg
- Mixed-layer LCL
- 734 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 379 m²/s²
- 0-3 km storm-relative helicity
- 460 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 5.9
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 7:21 PM CDT | Tornado Watch | SPC | Arkansas, Baxter, Boone, Bradley, Calhoun, Clark and 39 more | 5 hr |
| Apr 9, 8:44 PM CDT | Mesoscale Discussion | SPC | Arkansas, Baxter, Boone, Bradley, Calhoun, Clark and 40 more | 61 min |
| Apr 9, 9:10 PM CDT | Tornado Watch | SPC | Columbia, Hempstead, Howard, Lafayette, Little River, Miller and 3 more | 4 hr |
| Apr 9, 9:43 PM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Baxter, Bradley, Calhoun, Chicot and 51 more | 2 hr |
| Apr 9, 11:47 PM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Desha, Drew, Jefferson, Lincoln and 3 more | 58 min |
| Apr 10, 1:24 AM CDT | Mesoscale Discussion | SPC | East Carroll, Madison | 96 min |
| Apr 10, 1:43 AM CDT | Tornado Watch | SPC | Alcorn, Attala, Benton, Calhoun, Chickasaw, Choctaw and 23 more | 5 hr |
| Apr 10, 8:22 AM CDT | Mesoscale Discussion | SPC | Alcorn, Benton, Bolivar, Calhoun, Carroll, Chickasaw and 20 more | 83 min |
| Apr 10, 8:53 AM CDT | Tornado Watch | SPC | Alcorn, Benton, Calhoun, Chickasaw, DeSoto, Itawamba and 11 more | 7 hr |
| Apr 10, 11:14 AM CDT | Mesoscale Discussion | SPC | Alcorn, Benton, Itawamba, Prentiss, Tippah, Tishomingo and 1 more | 76 min |
| Apr 10, 12:58 PM CDT | Mesoscale Discussion | SPC | Itawamba | 92 min |
| Apr 9, 10:52 PM CDT | Severe Thunderstorm Watch | SPC | Bollinger, Butler, Cape Girardeau, Carter, Crawford, Iron and 12 more | 4 hr |
| Apr 10, 12:50 AM CDT | Mesoscale Discussion | SPC | Cape Girardeau, Mississippi, New Madrid, Perry, Scott | 85 min |
| Apr 10, 1:22 AM CDT | Severe Thunderstorm Watch | SPC | Bedford, Benton, Carroll, Cheatham, Chester, Davidson and 28 more | 4 hr |
| Apr 10, 3:33 AM CDT | Mesoscale Discussion | SPC | Bedford, Cannon, Cheatham, Clay, Coffee, Davidson and 24 more | 57 min |
| Apr 10, 11:23 AM CDT | Tornado Watch | SPC | Anderson, Bedford, Bledsoe, Blount, Bradley, Campbell and 43 more | 8 hr |
| Apr 10, 1:51 PM CDT | Tornado Watch | SPC | Carter, Claiborne, Cocke, Grainger, Greene, Hamblen and 8 more | 6 hr |
| Apr 10, 3:42 PM CDT | Mesoscale Discussion | SPC | Carter, Hancock, Hawkins, Johnson, Sullivan, Unicoi and 1 more | 63 min |
| Apr 10, 3:43 PM CDT | Mesoscale Discussion | SPC | Polk | 92 min |
| Apr 10, 6:53 PM CDT | Mesoscale Discussion | SPC | Carter, Claiborne, Grainger, Greene, Hamblen, Hancock and 7 more | 67 min |
Nearby
Tornado Watches in Mississippi, 2009Tornado Watches in Arkansas, 2009Tornado Watches in Tennessee, 2009Every tornado watch in 2009
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.