Alert archive / Arkansas / Tornado Watches in 2010
Tornado Watch 90
The Storm Prediction Center issued this tornado watch at Apr 24, 2010, 3:02 AM CDT for 20 counties in Arkansas. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 24, 2010, 3:02 AM CDT (08:02 UTC)
- Expired
- Apr 24, 2010, 11:00 AM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 70 kt
Counties Arkansas County, AR, Bradley County, AR, Calhoun County, AR, Clark County, AR, Cleveland County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Garland County, AR, Grant County, AR, Hot Spring County, AR, Jefferson County, AR, Lincoln County, AR, Lonoke County, AR, Monroe County, AR, Ouachita County, AR, Pike County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR
The radar
The Little Rock radar (KLZK), 65 km from the middle of the area, began a volume at 08:04 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
- 80%
- One or more gusts of 65 knots or more
- 50%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
14 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 24, 3:05 AM CDT | Severe Thunderstorm Warning | LZK | Clark, Hot Spring, Montgomery, Pike | 40 min |
| Apr 24, 4:20 AM CDT | Severe Thunderstorm Warning | LZK | Clark, Garland, Hot Spring, Pike | 40 min |
| Apr 24, 5:00 AM CDT | Severe Thunderstorm Warning | LZK | Faulkner, Perry, Pulaski | 30 min |
| Apr 24, 6:16 AM CDT | Severe Thunderstorm Warning | LZK | Arkansas, Desha, Drew | 59 min |
| Apr 24, 7:11 AM CDT | Severe Thunderstorm Warning | LZK | Bradley, Drew | 64 min |
| Apr 24, 7:46 AM CDT | Tornado Warning | LZK | Desha, Drew | 29 min |
| Apr 24, 8:45 AM CDT | Severe Thunderstorm Warning | LZK | Calhoun, Clark, Cleveland, Dallas, Ouachita | 45 min |
| Apr 24, 8:58 AM CDT | Severe Thunderstorm Warning | LZK | Bradley, Cleveland, Drew | 47 min |
| Apr 24, 9:24 AM CDT | Severe Thunderstorm Warning | LZK | Cleveland, Dallas, Grant, Jefferson | 36 min |
| Apr 24, 9:25 AM CDT | Tornado Warning | LZK | Bradley, Cleveland, Drew, Lincoln | 40 min |
| Apr 24, 9:31 AM CDT | Tornado Warning | LZK | Cleveland, Dallas, Grant, Jefferson | 44 min |
| Apr 24, 9:44 AM CDT | Tornado Warning | LZK | Arkansas, Desha, Drew, Jefferson, Lincoln | 46 min |
| Apr 24, 9:47 AM CDT | Tornado Warning | LZK | Cleveland, Jefferson | 28 min |
| Apr 24, 10:24 AM CDT | Tornado Warning | LZK | Arkansas, Jefferson, Monroe | 14 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, 8.0 hours before the alert went out and 199 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
- 325 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 463 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 239 m²/s²
- 0-3 km storm-relative helicity
- 179 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 23, 11:40 PM CDT | Mesoscale Discussion | SPC | Arkansas, Bradley, Calhoun, Clay, Cleveland, Craighead and 25 more | 65 min |
| Apr 24, 1:20 AM CDT | Mesoscale Discussion | SPC | Columbia, Lafayette | 25 min |
| Apr 24, 1:50 AM CDT | Tornado Watch | SPC | Columbia, Hempstead, Howard, Lafayette, Little River, Miller and 3 more | 8 hr |
| Apr 24, 2:44 AM CDT | Mesoscale Discussion | SPC | Arkansas, Cleburne, Cleveland, Craighead, Crittenden, Cross and 24 more | 91 min |
| Apr 24, 5:01 AM CDT | Mesoscale Discussion | SPC | Ashley, Bradley, Calhoun, Chicot, Columbia, Drew and 2 more | 89 min |
| Apr 24, 6:00 AM CDT | Tornado Watch | SPC | Ashley, Chicot, Clay, Craighead, Crittenden, Cross and 8 more | 6 hr |
| Apr 24, 7:25 AM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Cleveland, Drew, Jefferson and 3 more | 95 min |
| Apr 24, 9:31 AM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Chicot, Cleveland, Crittenden, Cross and 12 more | 59 min |
| Apr 24, 11:08 AM CDT | Mesoscale Discussion | SPC | Arkansas, Baxter, Clay, Cleburne, Conway, Craighead and 24 more | 67 min |
| Apr 24, 11:31 AM CDT | Tornado Watch | SPC | Clay, Craighead, Crittenden, Cross, Greene, Lawrence and 6 more | 8 hr |
| Apr 24, 1:52 PM CDT | Mesoscale Discussion | SPC | Baxter, Boone, Marion | 53 min |
| Apr 24, 2:01 PM CDT | Mesoscale Discussion | SPC | Clay, Craighead, Crittenden, Greene, Mississippi, Poinsett | 89 min |
Nearby
Tornado 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.