Alert archive / Arkansas / Severe Thunderstorm Watches in 2009
Severe Thunderstorm Watch 35
The Storm Prediction Center issued this severe thunderstorm watch at Feb 26, 2009, 9:40 PM CST for 26 counties in Arkansas; Dunklin County, Pemiscot County, Missouri; 6 counties in Tennessee. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 26, 2009, 9:40 PM CST (03:40 UTC)
- Expired
- Feb 27, 2009, 2:58 AM CST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 34 counties
Arkansas County, AR, Bradley County, AR, Calhoun County, AR, Clay County, AR, Cleveland County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Greene County, AR, Jackson County, AR, Jefferson County, AR, Lawrence County, AR, Lee County, AR, Lincoln County, AR, Mississippi County, AR, Monroe County, AR, Ouachita County, AR, Phillips County, AR, Poinsett County, AR, Prairie County, AR, Randolph County, AR, St. Francis County, AR, Woodruff County, AR, Dunklin County, MO, Pemiscot County, MO, Dyer County, TN, Lake County, TN, Lauderdale County, TN, Obion County, TN, Shelby County, TN, Tipton County, TN
The radar
The Little Rock radar (KLZK), 71 km from the middle of the area, began a volume at 03:41 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
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- 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
- 10%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
5 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 26, 11:17 PM CST | Severe Thunderstorm Warning | LZK | Jefferson, Lonoke, Pulaski | 58 min |
| Feb 26, 11:49 PM CST | Severe Thunderstorm Warning | MEG | Clay, Greene, Randolph | 41 min |
| Feb 27, 12:06 AM CST | Severe Thunderstorm Warning | LZK | Arkansas, Lonoke, Monroe, Prairie | 39 min |
| Feb 27, 12:35 AM CST | Severe Thunderstorm Warning | LZK | Clark, Dallas, Hot Spring | 40 min |
| Feb 27, 12:45 AM CST | Severe Thunderstorm Warning | LZK | Arkansas, Monroe, Prairie | 15 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, 3.7 hours before the alert went out and 145 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
- 170 J/kg
- Mixed-layer CIN
- -308 J/kg
- Mixed-layer LCL
- 917 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 290 m²/s²
- 0-3 km storm-relative helicity
- 332 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 26, 6:12 PM CST | Severe Thunderstorm Watch | SPC | Baxter, Benton, Boone, Carroll, Clark, Cleburne and 40 more | 8 hr |
| Feb 26, 7:42 PM CST | Mesoscale Discussion | SPC | Baxter, Boone, Carroll, Clark, Clay, Cleburne and 41 more | 93 min |
| Feb 26, 8:29 PM CST | Mesoscale Discussion | SPC | Hempstead, Lafayette, Little River, Miller, Nevada | 2 hr |
| Feb 26, 9:09 PM CST | Mesoscale Discussion | SPC | Arkansas, Clay, Craighead, Crittenden, Cross, Grant and 12 more | 96 min |
| Feb 26, 10:36 PM CST | Mesoscale Discussion | SPC | Arkansas, Baxter, Bradley, Calhoun, Clark, Clay and 46 more | 114 min |
| Feb 27, 1:45 AM CST | Mesoscale Discussion | SPC | Arkansas, Cleveland, Craighead, Crittenden, Cross, Dallas and 18 more | 30 min |
| Feb 27, 8:29 AM CST | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 10 more | 31 min |
| Feb 27, 8:40 AM CST | Severe Thunderstorm Watch | SPC | Ashley, Bradley, Calhoun, Chicot, Cleveland, Columbia and 7 more | 6 hr |
| Feb 27, 10:15 AM CST | Mesoscale Discussion | SPC | Ashley, Bradley, Calhoun, Chicot, Clark, Cleveland and 10 more | 90 min |
| Feb 27, 12:16 PM CST | Mesoscale Discussion | SPC | Chicot | 89 min |
| Feb 27, 12:38 PM CST | Tornado Watch | SPC | Ashley, Chicot | 7 hr |
| Feb 27, 2:40 PM CST | Mesoscale Discussion | SPC | Arkansas, Clark, Cleveland, Conway, Dallas, Desha and 21 more | 65 min |
| Feb 26, 8:46 PM CST | Severe Thunderstorm Watch | SPC | Bollinger, Butler, Cape Girardeau, Carter, Madison, Mississippi and 8 more | 6 hr |
| Feb 27, 3:58 AM CST | Severe Thunderstorm Watch | SPC | Bedford, Cannon, Cheatham, Clay, Coffee, Cumberland and 23 more | 119 min |
Nearby
Severe Thunderstorm Watches in Arkansas, 2009Severe Thunderstorm Watches in Tennessee, 2009Severe Thunderstorm Watches in Missouri, 2009Every severe thunderstorm 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.