Alert archive / Tennessee / Tornado Watches in 2009
Tornado Watch 267
The Storm Prediction Center issued this tornado watch at May 8, 2009, 9:21 AM CDT for 5 states. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- May 8, 2009, 9:21 AM CDT (14:21 UTC)
- Expired
- May 8, 2009, 4:00 PM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 90 kt
All 114 counties
Clay County, AR, Cleburne County, AR, Craighead County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Lawrence County, AR, Mississippi County, AR, Poinsett County, AR, Randolph County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Alexander County, IL, Edwards County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jefferson County, IL, Johnson County, IL, Massac County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Randolph County, IL, Saline County, IL, Union County, IL, Wabash County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Ballard County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Christian County, KY, Crittenden County, KY, Daviess County, KY, Fulton County, KY, Graves County, KY, Henderson County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Muhlenberg County, KY, Todd County, KY, Trigg County, KY, Union County, KY, Webster County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Crawford County, MO, Dent County, MO, Dunklin County, MO, Iron County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Oregon County, MO, Pemiscot County, MO, Perry County, MO, Reynolds County, MO, Ripley County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Scott County, MO, Shannon County, MO, Stoddard County, MO, Washington County, MO, Wayne County, MO, Benton County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Crockett County, TN, Davidson County, TN, Decatur County, TN, Dickson County, TN, Dyer County, TN, Gibson County, TN, Giles County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Lake County, TN, Lauderdale County, TN, Lawrence County, TN, Lewis County, TN, Madison County, TN, Marshall County, TN, Maury County, TN, Montgomery County, TN, Obion County, TN, Perry County, TN, Robertson County, TN, Stewart County, TN, Tipton County, TN, Wayne County, TN, Weakley County, TN, Williamson County, TN
The radar
The Paducah radar (KPAH), 122 km from the middle of the area, began a volume at 14:24 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
- 60%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 95%
- One or more gusts of 65 knots or more
- 95%
- Ten or more severe hail reports
- 70%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
66 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 8, 9:22 AM CDT | Severe Thunderstorm Warning | LZK | Baxter, Boone, Fulton, Izard, Marion, Newton and 3 more | 53 min |
| May 8, 9:37 AM CDT | Severe Thunderstorm Warning | LSX | Franklin, Jefferson, Saint Francois, Washington | 38 min |
| May 8, 9:39 AM CDT | Severe Thunderstorm Warning | LZK | Independence, Izard, Newton, Searcy, Stone, Van Buren | 36 min |
| May 8, 9:40 AM CDT | Tornado Warning | SGF | Oregon, Shannon | 50 min |
| May 8, 9:46 AM CDT | Severe Thunderstorm Warning | MEG | Clay, Craighead, Greene, Lawrence, Randolph | 44 min |
| May 8, 9:46 AM CDT | Severe Thunderstorm Warning | PAH | Butler, Carter, Ripley, Wayne | 59 min |
| May 8, 9:53 AM CDT | Severe Thunderstorm Warning | LZK | Fulton, Independence, Izard, Sharp | 37 min |
| May 8, 9:53 AM CDT | Severe Thunderstorm Warning | LSX | Iron, Reynolds | 52 min |
| May 8, 9:56 AM CDT | Severe Thunderstorm Warning | SGF | Camden, Dent, Howell, Maries, Miller, Oregon and 4 more | 64 min |
| May 8, 10:01 AM CDT | Flash Flood Warning | LSX | Crawford, Gasconade | 6 hr |
| May 8, 10:02 AM CDT | Severe Thunderstorm Warning | LSX | Jefferson, Sainte Genevieve, Saint Francois | 43 min |
| May 8, 10:02 AM CDT | Tornado Warning | SGF | Dent | 43 min |
| May 8, 10:30 AM CDT | Severe Thunderstorm Warning | PAH | Bollinger, Butler, Cape Girardeau, New Madrid, Scott, Stoddard and 1 more | 45 min |
| May 8, 10:32 AM CDT | Severe Thunderstorm Warning | LSX | Madison, Saint Francois, Washington | 43 min |
| May 8, 10:34 AM CDT | Severe Thunderstorm Warning | LSX | Monroe, Randolph, Saint Clair | 41 min |
| May 8, 10:42 AM CDT | Tornado Warning | SGF | Dent | 21 min |
| May 8, 10:45 AM CDT | Severe Thunderstorm Warning | PAH | Jackson | 45 min |
| May 8, 10:47 AM CDT | Severe Thunderstorm Warning | LSX | Crawford, Iron, Reynolds | 58 min |
| May 8, 10:50 AM CDT | Flash Flood Warning | PAH | Butler, Carter, Ripley, Wayne | 4 hr |
| May 8, 10:52 AM CDT | Tornado Warning | LSX | Randolph | 38 min |
| May 8, 10:53 AM CDT | Severe Thunderstorm Warning | PAH | Alexander, Pulaski, Union | 67 min |
| May 8, 10:57 AM CDT | Tornado Warning | PAH | Jackson, Perry | 48 min |
| May 8, 11:01 AM CDT | Severe Thunderstorm Warning | MEG | Clay | 29 min |
| May 8, 11:01 AM CDT | Flash Flood Warning | LSX | Iron, Jefferson, Sainte Genevieve, Saint Francois, Washington | 6 hr |
| May 8, 11:05 AM CDT | Severe Thunderstorm Warning | PAH | Carlisle, Fulton, Hickman | 55 min |
| May 8, 11:10 AM CDT | Flash Flood Warning | PAH | Franklin, Jackson, Jefferson, Perry, Williamson | 6 hr |
| May 8, 11:12 AM CDT | Severe Thunderstorm Warning | MEG | Clay, Greene, Mississippi | 33 min |
| May 8, 11:12 AM CDT | Severe Thunderstorm Warning | LSX | Washington | 33 min |
| May 8, 11:16 AM CDT | Severe Thunderstorm Warning | PAH | Franklin, Williamson | 44 min |
| May 8, 11:27 AM CDT | Severe Thunderstorm Warning | PAH | Jackson | 38 min |
| May 8, 11:28 AM CDT | Severe Thunderstorm Warning | LZK | Baxter, Fulton, Izard, Marion | 32 min |
| May 8, 11:29 AM CDT | Severe Thunderstorm Warning | MEG | Clay | 31 min |
| May 8, 11:31 AM CDT | Tornado Warning | LSX | Iron, Madison, Saint Francois, Washington | 29 min |
| May 8, 11:34 AM CDT | Severe Thunderstorm Warning | PAH | Johnson, Massac, Pope, Pulaski | 56 min |
| May 8, 11:39 AM CDT | Tornado Warning | PAH | Perry | 36 min |
| May 8, 11:45 AM CDT | Tornado Warning | LSX | Sainte Genevieve, Saint Francois | 45 min |
| May 8, 11:51 AM CDT | Tornado Warning | PAH | Franklin, Jackson, Williamson | 27 min |
| May 8, 12:00 PM CDT | Flash Flood Warning | SGF | Douglas, Howell, Oregon, Shannon | 6 hr |
| May 8, 12:05 PM CDT | Severe Thunderstorm Warning | LSX | Madison, Saint Francois | 40 min |
| May 8, 12:19 PM CDT | Severe Thunderstorm Warning | PAH | Bollinger, Cape Girardeau, Perry | 56 min |
| May 8, 12:27 PM CDT | Severe Thunderstorm Warning | LSX | Randolph | 50 min |
| May 8, 12:31 PM CDT | Tornado Warning | LSX | Madison | 15 min |
| May 8, 12:33 PM CDT | Severe Thunderstorm Warning | PAH | Jackson, Perry, Union | 42 min |
| May 8, 12:38 PM CDT | Flash Flood Warning | LSX | Monroe, Randolph, Saint Clair, Washington | 5 hr |
| May 8, 12:38 PM CDT | Severe Thunderstorm Warning | PAH | Daviess | 37 min |
| May 8, 12:56 PM CDT | Severe Thunderstorm Warning | PAH | Franklin, Jefferson, Johnson, Union, Williamson | 64 min |
| May 8, 1:05 PM CDT | Severe Thunderstorm Warning | OHX | Houston, Montgomery, Stewart | 40 min |
| May 8, 1:10 PM CDT | Severe Thunderstorm Warning | LZK | Baxter, Fulton, Izard | 50 min |
| May 8, 1:14 PM CDT | Severe Thunderstorm Warning | PAH | Jackson, Perry, Union | 46 min |
| May 8, 1:14 PM CDT | Tornado Warning | PAH | Franklin, Jackson, Perry | 31 min |
| May 8, 1:16 PM CDT | Tornado Warning | OHX | Montgomery, Stewart | 44 min |
| May 8, 1:29 PM CDT | Severe Thunderstorm Warning | PAH | Gallatin, Hamilton, Saline, Wayne, White | 61 min |
| May 8, 1:30 PM CDT | Flash Flood Warning | PAH | Daviess, McLean, Muhlenberg | 5 hr |
| May 8, 1:36 PM CDT | Severe Thunderstorm Warning | PAH | Daviess, McLean | 14 min |
| May 8, 1:43 PM CDT | Severe Thunderstorm Warning | PAH | Christian, Todd | 47 min |
| May 8, 1:43 PM CDT | Tornado Warning | OHX | Montgomery, Robertson | 47 min |
| May 8, 1:46 PM CDT | Flash Flood Warning | PAH | Christian, Todd | 77 min |
| May 8, 1:54 PM CDT | Severe Thunderstorm Warning | PAH | Christian, Todd | 51 min |
| May 8, 1:57 PM CDT | Severe Thunderstorm Warning | PAH | Franklin, Jefferson, Williamson | 48 min |
| May 8, 2:16 PM CDT | Severe Thunderstorm Warning | PAH | Edwards, Gallatin, Wabash, White | 59 min |
| May 8, 2:25 PM CDT | Severe Thunderstorm Warning | PAH | Gallatin, Hamilton, Saline, Wayne, White | 35 min |
| May 8, 2:30 PM CDT | Tornado Warning | OHX | Robertson, Sumner | 45 min |
| May 8, 2:31 PM CDT | Flash Flood Warning | LZK | Fulton, Sharp | 89 min |
| May 8, 2:33 PM CDT | Severe Thunderstorm Warning | MEG | Clay, Randolph | 27 min |
| May 8, 3:12 PM CDT | Severe Thunderstorm Warning | MEG | Clay, Greene, Randolph | 33 min |
| May 8, 3:43 PM CDT | Severe Thunderstorm Warning | MEG | Clay, Craighead, Greene, Mississippi | 47 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, 2.4 hours before the alert went out and 228 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
- 1297 J/kg
- Mixed-layer CIN
- -163 J/kg
- Mixed-layer LCL
- 606 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 144 m²/s²
- 0-3 km storm-relative helicity
- 138 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 2.1
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 8, 4:31 AM CDT | Mesoscale Discussion | SPC | Benton, Boone, Carroll, Crawford, Franklin, Johnson and 3 more | 59 min |
| May 8, 4:55 AM CDT | Severe Thunderstorm Watch | SPC | Baxter, Benton, Boone, Carroll, Crawford, Franklin and 10 more | 7 hr |
| May 8, 7:17 AM CDT | Mesoscale Discussion | SPC | Baxter, Benton, Boone, Carroll, Fulton, Izard and 1 more | 58 min |
| May 8, 8:37 AM CDT | Mesoscale Discussion | SPC | Clay, Craighead, Crittenden, Cross, Faulkner, Greene and 12 more | 53 min |
| May 8, 11:08 AM CDT | Mesoscale Discussion | SPC | Baxter, Boone, Carroll, Crawford, Franklin, Fulton and 6 more | 67 min |
| May 8, 2:16 PM CDT | Mesoscale Discussion | SPC | Clay, Craighead, Greene, Lawrence, Mississippi, Poinsett and 2 more | 89 min |
| May 8, 3:24 PM CDT | Mesoscale Discussion | SPC | Greene, Mississippi | 66 min |
| May 8, 3:42 PM CDT | Tornado Watch | SPC | Clay, Craighead, Greene, Mississippi, Poinsett | 7 hr |
| May 8, 5:52 PM CDT | Tornado Watch | SPC | Baxter, Benton, Boone, Carroll, Cleburne, Conway and 35 more | 11 hr |
| May 7, 9:38 PM CDT | Mesoscale Discussion | SPC | Clinton, Franklin, Gallatin, Hamilton, Jackson, Jefferson and 13 more | 97 min |
| May 7, 10:17 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Franklin, Gallatin, Hardin, Jackson, Johnson and 9 more | 8 hr |
| May 7, 11:46 PM CDT | Mesoscale Discussion | SPC | Alexander, Bond, Clark, Clay, Clinton, Coles and 33 more | 89 min |
| May 8, 3:34 AM CDT | Mesoscale Discussion | SPC | Alexander, Massac, Pulaski | 56 min |
| May 8, 5:47 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Henderson, Henry, Jo Daviess and 9 more | 58 min |
| May 8, 6:10 PM CDT | Severe Thunderstorm Watch | SPC | Bureau, Carroll, Henderson, Henry, Jo Daviess, Knox and 13 more | 4 hr |
| May 8, 4:29 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Allen, Barren, Clinton, Cumberland, Logan and 5 more | 3 hr |
| May 8, 12:08 PM CDT | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Barren, Bell, Bourbon and 54 more | 97 min |
| May 8, 12:44 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Allen, Anderson, Barren, Bath, Bell and 72 more | 6 hr |
| May 8, 5:03 PM CDT | Mesoscale Discussion | SPC | Bell, Boyd, Breathitt, Carter, Clay, Elliott and 20 more | 87 min |
| May 7, 7:37 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Andrew, Atchison, Buchanan, Caldwell, Carroll and 25 more | 6 hr |
| May 8, 5:32 PM CDT | Tornado Watch | SPC | Carter, Cocke, Greene, Hawkins, Johnson, Sullivan and 2 more | 7 hr |
Nearby
Tornado Watches in Tennessee, 2009Tornado Watches in Missouri, 2009Tornado Watches in Kentucky, 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.