Alert archive / Arkansas / Tornado Watches in 2009
Tornado Watch 761
The Storm Prediction Center issued this tornado watch at Oct 8, 2009, 8:00 PM CDT for 5 states. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Oct 8, 2009, 8:00 PM CDT (01:00 UTC)
- Expired
- Oct 9, 2009, 3:00 AM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 75 counties
Baxter County, AR, Boone County, AR, Clay County, AR, Cleburne County, AR, Conway County, AR, Craighead County, AR, Faulkner County, AR, Fulton County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Johnson County, AR, Lawrence County, AR, Logan County, AR, Marion County, AR, Mississippi County, AR, Newton County, AR, Perry County, AR, Poinsett County, AR, Pope County, AR, Randolph County, AR, Scott County, AR, Searcy County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Yell County, AR, Alexander County, IL, Hardin County, IL, Johnson County, IL, Massac County, IL, Pope County, IL, Pulaski 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, Butler County, MO, Dunklin County, MO, Howell County, MO, Mississippi County, MO, New Madrid County, MO, Oregon County, MO, Ozark County, MO, Pemiscot County, MO, Ripley County, MO, Scott County, MO, Stoddard County, MO, Dyer County, TN, Gibson County, TN, Henry County, TN, Lake County, TN, Lauderdale County, TN, Obion County, TN, Weakley County, TN
The radar
The Memphis radar (KNQA), 170 km from the middle of the area, began a volume at 01:00 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
- 50%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 40%
- 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
- 10%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
20 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 8, 8:16 PM CDT | Flash Flood Warning | PAH | Johnson, Massac, Pope | 78 min |
| Oct 8, 8:40 PM CDT | Flash Flood Warning | PAH | Hardin, Pope | 54 min |
| Oct 8, 8:43 PM CDT | Severe Thunderstorm Warning | LZK | Boone, Marion | 47 min |
| Oct 8, 9:10 PM CDT | Tornado Warning | SGF | Ozark | 15 min |
| Oct 8, 10:09 PM CDT | Flash Flood Warning | LZK | Baxter, Boone, Marion | 6 hr |
| Oct 8, 10:25 PM CDT | Severe Thunderstorm Warning | LZK | Baxter, Fulton | 50 min |
| Oct 8, 10:36 PM CDT | Flash Flood Warning | PAH | Alexander, Gallatin, Hardin, Jackson, Johnson, Pope and 4 more | 6 hr |
| Oct 8, 11:11 PM CDT | Severe Thunderstorm Warning | LZK | Johnson, Newton | 49 min |
| Oct 8, 11:22 PM CDT | Severe Thunderstorm Warning | MEG | Randolph | 45 min |
| Oct 8, 11:24 PM CDT | Flash Flood Warning | LZK | Boone, Johnson, Marion, Newton, Searcy | 6 hr |
| Oct 8, 11:27 PM CDT | Flash Flood Warning | PAH | Gallatin, Hardin, Pope | 6 hr |
| Oct 8, 11:39 PM CDT | Flash Flood Warning | PAH | Alexander, Johnson, Massac, Pope, Pulaski | 6 hr |
| Oct 8, 11:50 PM CDT | Severe Thunderstorm Warning | PAH | Ripley | 15 min |
| Oct 8, 11:52 PM CDT | Severe Thunderstorm Warning | LZK | Johnson, Newton, Pope, Searcy | 38 min |
| Oct 9, 12:22 AM CDT | Flash Flood Warning | MEG | Clay, Greene, Lawrence, Randolph | 14 hr |
| Oct 9, 12:30 AM CDT | Flash Flood Warning | LZK | Baxter, Fulton, Izard, Johnson, Logan, Marion and 6 more | 6 hr |
| Oct 9, 12:35 AM CDT | Severe Thunderstorm Warning | LZK | Conway, Pope, Searcy, Stone, Van Buren | 40 min |
| Oct 9, 1:02 AM CDT | Flash Flood Warning | LZK | Logan, Scott, Yell | 6 hr |
| Oct 9, 1:18 AM CDT | Severe Thunderstorm Warning | LZK | Cleburne, Conway, Izard, Searcy, Stone, Van Buren | 42 min |
| Oct 9, 1:39 AM CDT | Flash Flood Warning | LZK | Cleburne, Conway, Faulkner, Garland, Independence, Izard and 13 more | 6 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 1.0 hours before the alert went out and 236 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 499 m above ground
- 0-6 km bulk shear
- 71 kt
- 0-1 km storm-relative helicity
- -367 m²/s²
- 0-3 km storm-relative helicity
- -20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 8, 7:35 PM CDT | Mesoscale Discussion | SPC | Baxter, Boone, Clay, Cleburne, Conway, Craighead and 15 more | 55 min |
| Oct 8, 11:06 PM CDT | Mesoscale Discussion | SPC | Baxter, Clay, Cleburne, Conway, Craighead, Faulkner and 17 more | 84 min |
| Oct 8, 11:40 PM CDT | Mesoscale Discussion | SPC | Crawford, Sebastian | 95 min |
| Oct 9, 2:38 AM CDT | Mesoscale Discussion | SPC | Clark, Cleburne, Craighead, Crittenden, Cross, Faulkner and 24 more | 52 min |
| Oct 9, 6:59 AM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Clark, Cleveland and 14 more | 3 hr |
| Oct 9, 8:24 AM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 7 more | 66 min |
| Oct 9, 8:36 AM CDT | Tornado Watch | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 11 more | 4 hr |
| Oct 9, 10:45 AM CDT | Mesoscale Discussion | SPC | Chicot, Desha | 90 min |
| Oct 9, 12:08 PM CDT | Mesoscale Discussion | SPC | Adair, Allen, Barren, Boyle, Casey, Clinton and 23 more | 67 min |
| Oct 9, 12:24 PM CDT | Tornado Watch | SPC | Adair, Allen, Barren, Casey, Clinton, Cumberland and 11 more | 7 hr |
| Oct 9, 2:17 PM CDT | Tornado Watch | SPC | Bell, Boyd, Breathitt, Carter, Clay, Elliott and 28 more | 4 hr |
| Oct 9, 2:39 PM CDT | Mesoscale Discussion | SPC | Bell, Breathitt, Carter, Clay, Clinton, Cumberland and 30 more | 96 min |
| Oct 9, 4:52 PM CDT | Mesoscale Discussion | SPC | Bell, Breathitt, Clay, Floyd, Harlan, Johnson and 13 more | 83 min |
| Oct 9, 3:27 PM CDT | Tornado Watch | SPC | Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 27 more | 6 hr |
| Oct 9, 6:13 PM CDT | Mesoscale Discussion | SPC | Blount, Bradley, Carter, Cocke, Grainger, Greene and 16 more | 62 min |
Nearby
Tornado Watches in Arkansas, 2009Tornado Watches in Kentucky, 2009Tornado Watches in Missouri, 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.