Alert archive / Tennessee / Tornado Watches in 2010
Tornado Watch 122
The Storm Prediction Center issued this tornado watch at May 1, 2010, 3:11 AM CDT for 4 states. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- May 1, 2010, 3:11 AM CDT (08:11 UTC)
- Expired
- May 1, 2010, 11:00 AM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 114 counties
Colbert County, AL, Franklin County, AL, Lauderdale County, AL, Arkansas County, AR, Ashley County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Clark County, AR, Cleveland County, AR, Crittenden County, AR, Cross County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Faulkner County, AR, Garland County, AR, Grant County, AR, Hot Spring County, AR, Jefferson County, AR, Lee County, AR, Lincoln County, AR, Lonoke County, AR, Mississippi County, AR, Monroe County, AR, Ouachita County, AR, Phillips County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, St. Francis County, AR, White County, AR, Woodruff County, AR, Alcorn County, MS, Benton County, MS, Bolivar County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Clay County, MS, Coahoma County, MS, DeSoto County, MS, Grenada County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Leflore County, MS, Marshall County, MS, Monroe County, MS, Montgomery County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Quitman County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Union County, MS, Washington County, MS, Webster County, MS, Yalobusha County, MS, Bedford County, TN, Benton County, TN, Cannon County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Clay County, TN, Crockett County, TN, Davidson County, TN, Decatur County, TN, DeKalb County, TN, Dickson County, TN, Fayette County, TN, Fentress County, TN, Gibson County, TN, Giles County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lauderdale County, TN, Lawrence County, TN, Lewis County, TN, Macon County, TN, Madison County, TN, Marshall County, TN, Maury County, TN, McNairy County, TN, Montgomery County, TN, Overton County, TN, Perry County, TN, Pickett County, TN, Putnam County, TN, Robertson County, TN, Rutherford County, TN, Shelby County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Tipton County, TN, Trousdale County, TN, Wayne County, TN, Weakley County, TN, Williamson County, TN, Wilson County, TN
The radar
The Memphis radar (KNQA), 68 km from the middle of the area, began a volume at 08:11 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
- 40%
- 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
- 95%
Warnings issued inside it
37 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 1, 3:21 AM CDT | Severe Thunderstorm Warning | OHX | Benton, Houston, Humphreys | 39 min |
| May 1, 3:32 AM CDT | Flash Flood Warning | MEG | Cross, Lee, Phillips, St. Francis | 9 hr |
| May 1, 3:32 AM CDT | Severe Thunderstorm Warning | MEG | Crittenden, Cross, Lee, St. Francis | 43 min |
| May 1, 3:36 AM CDT | Tornado Warning | MEG | Fayette, Hardeman, Haywood, Madison | 39 min |
| May 1, 3:37 AM CDT | Severe Thunderstorm Warning | OHX | Montgomery, Stewart | 38 min |
| May 1, 3:43 AM CDT | Severe Thunderstorm Warning | MEG | Crittenden, Mississippi | 47 min |
| May 1, 3:54 AM CDT | Flash Flood Warning | MEG | Carroll, Chester, Gibson, Hardeman, Haywood, Henderson and 2 more | 12 hr |
| May 1, 4:02 AM CDT | Severe Thunderstorm Warning | MEG | Fayette, Hardeman, Haywood, Lauderdale, Madison, Tipton | 43 min |
| May 1, 4:02 AM CDT | Severe Thunderstorm Warning | OHX | Benton, Dickson, Houston, Humphreys, Perry | 58 min |
| May 1, 4:06 AM CDT | Tornado Warning | MEG | Crittenden, Lee, St. Francis | 39 min |
| May 1, 4:11 AM CDT | Severe Thunderstorm Warning | OHX | Cheatham, Montgomery, Robertson | 34 min |
| May 1, 4:14 AM CDT | Tornado Warning | MEG | Chester, Crockett, Fayette, Hardeman, Haywood, Madison | 35 min |
| May 1, 4:21 AM CDT | Flash Flood Warning | LZK | Arkansas, Monroe, Prairie, Woodruff | 3 hr |
| May 1, 4:29 AM CDT | Severe Thunderstorm Warning | MEG | Crittenden, Mississippi | 46 min |
| May 1, 4:47 AM CDT | Flash Flood Warning | MEG | Crittenden, Lee, Phillips, St. Francis | 12 hr |
| May 1, 4:48 AM CDT | Severe Thunderstorm Warning | MEG | Carroll, Chester, Gibson, Henderson, Madison | 27 min |
| May 1, 5:10 AM CDT | Severe Thunderstorm Warning | MEG | Carroll, Chester, Decatur, Gibson, Henderson, Madison | 50 min |
| May 1, 5:30 AM CDT | Severe Thunderstorm Warning | OHX | Benton, Humphreys | 45 min |
| May 1, 5:34 AM CDT | Severe Thunderstorm Warning | MEG | Fayette, Hardeman, Haywood, Tipton | 41 min |
| May 1, 5:35 AM CDT | Flash Flood Warning | MEG | Chester, Decatur, Henderson | 6 hr |
| May 1, 7:19 AM CDT | Flash Flood Warning | MEG | Benton, DeSoto, Marshall, Tate | 4 hr |
| May 1, 7:19 AM CDT | Severe Thunderstorm Warning | OHX | Maury, Williamson | 26 min |
| May 1, 7:23 AM CDT | Tornado Warning | MEG | DeSoto, Marshall | 52 min |
| May 1, 7:53 AM CDT | Tornado Warning | MEG | Benton, Marshall | 52 min |
| May 1, 8:21 AM CDT | Flash Flood Warning | OHX | Benton, Dickson, Hickman, Humphreys, Perry | 8 hr |
| May 1, 8:30 AM CDT | Tornado Warning | MEG | Chester, Hardeman, Madison | 45 min |
| May 1, 8:38 AM CDT | Severe Thunderstorm Warning | MEG | Chester, Decatur, Hardin, Henderson | 52 min |
| May 1, 8:50 AM CDT | Tornado Warning | MEG | Decatur, Henderson | 40 min |
| May 1, 9:08 AM CDT | Tornado Warning | MEG | Chester, Henderson, Madison | 52 min |
| May 1, 9:14 AM CDT | Severe Thunderstorm Warning | MEG | Haywood, Lauderdale, Tipton | 19 min |
| May 1, 9:18 AM CDT | Tornado Warning | MEG | DeSoto, Marshall | 16 min |
| May 1, 10:04 AM CDT | Tornado Warning | MEG | DeSoto | 41 min |
| May 1, 10:14 AM CDT | Flash Flood Warning | MEG | Phillips | 4 hr |
| May 1, 10:26 AM CDT | Flash Flood Warning | OHX | Maury | 6 hr |
| May 1, 10:28 AM CDT | Tornado Warning | MEG | Fayette, Shelby | 47 min |
| May 1, 10:35 AM CDT | Flash Flood Warning | OHX | Williamson | 6 hr |
| May 1, 11:00 AM CDT | Severe Thunderstorm Warning | MEG | Fayette, Hardeman, Haywood | 45 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, 8.2 hours before the alert went out and 96 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
- 3037 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 525 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 188 m²/s²
- 0-3 km storm-relative helicity
- 226 m²/s²
- Significant tornado parameter
- 4.6
- Supercell composite
- 15.8
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 30, 9:05 PM CDT | Mesoscale Discussion | SPC | Greene, Hale, Lamar, Pickens, Sumter | 55 min |
| May 1, 6:17 AM CDT | Mesoscale Discussion | SPC | Colbert, Franklin, Lauderdale, Marion | 88 min |
| May 1, 9:52 AM CDT | Tornado Watch | SPC | Colbert, Cullman, Fayette, Franklin, Lamar, Lauderdale and 8 more | 8 hr |
| May 1, 2:54 PM CDT | Mesoscale Discussion | SPC | Colbert, Franklin, Jackson, Lauderdale, Lawrence, Limestone and 3 more | 66 min |
| May 1, 5:04 PM CDT | Mesoscale Discussion | SPC | Colbert, Cullman, Fayette, Franklin, Jackson, Lamar and 10 more | 56 min |
| Apr 30, 7:26 PM CDT | Mesoscale Discussion | SPC | Baxter, Cleburne, Conway, Faulkner, Fulton, Garland and 15 more | 2 hr |
| Apr 30, 9:09 PM CDT | Tornado Watch | SPC | Arkansas, Bradley, Calhoun, Clark, Clay, Cleburne and 49 more | 7 hr |
| Apr 30, 10:43 PM CDT | Mesoscale Discussion | SPC | Arkansas, Bradley, Calhoun, Clark, Clay, Cleburne and 49 more | 62 min |
| Apr 30, 11:41 PM CDT | Mesoscale Discussion | SPC | Arkansas, Bradley, Calhoun, Clark, Clay, Cleburne and 45 more | 64 min |
| May 1, 2:25 AM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 40 more | 95 min |
| May 1, 7:48 AM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 22 more | 57 min |
| May 1, 11:19 AM CDT | Mesoscale Discussion | SPC | Crittenden | 56 min |
| May 1, 1:37 PM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 38 more | 53 min |
| May 1, 3:11 PM CDT | Mesoscale Discussion | SPC | Benton | 94 min |
| May 1, 3:18 PM CDT | Tornado Watch | SPC | Arkansas, Bradley, Calhoun, Clark, Cleburne, Cleveland and 43 more | 7 hr |
| May 1, 5:43 PM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Clark, Cleveland and 31 more | 62 min |
| Apr 30, 8:36 PM CDT | Mesoscale Discussion | SPC | Ballard, Carlisle, Fulton, Hickman, McCracken | 54 min |
| Apr 30, 9:03 PM CDT | Tornado Watch | SPC | Ballard, Carlisle, Fulton, Graves, Hickman, McCracken | 6 hr |
| May 1, 1:11 AM CDT | Tornado Watch | SPC | Breckinridge, Butler, Caldwell, Calloway, Christian, Crittenden and 17 more | 6 hr |
| May 1, 2:54 AM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Barren, Boone, Breckinridge, Bullitt and 38 more | 2 hr |
| May 1, 4:40 AM CDT | Tornado Watch | SPC | Adair, Allen, Barren, Boyle, Bullitt, Casey and 21 more | 4 hr |
| May 1, 12:01 AM CDT | Tornado Watch | SPC | Alcorn, Benton, Calhoun, Coahoma, DeSoto, Lafayette and 10 more | 3 hr |
| May 1, 5:35 PM CDT | Tornado Watch | SPC | Anderson, Bedford, Bledsoe, Blount, Bradley, Coffee and 19 more | 4 hr |
Nearby
Tornado Watches in Tennessee, 2010Tornado Watches in Mississippi, 2010Tornado Watches in Arkansas, 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.