Alert archive / Arkansas / Severe Thunderstorm Watches in 2012
Severe Thunderstorm Watch 530
The Storm Prediction Center issued this severe thunderstorm watch at Jul 26, 2012, 5:46 PM CDT for 4 states. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 26, 2012, 5:46 PM CDT (22:46 UTC)
- Expired
- Jul 26, 2012, 11:48 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 80 counties
Clark County, AR, Clay County, AR, Cleburne County, AR, Conway County, AR, Craighead County, AR, Crawford County, AR, Crittenden County, AR, Cross County, AR, Dallas County, AR, Faulkner County, AR, Franklin County, AR, Fulton County, AR, Garland County, AR, Grant County, AR, Greene County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Jefferson County, AR, Johnson County, AR, Lawrence County, AR, Little River County, AR, Logan County, AR, Lonoke County, AR, Miller County, AR, Mississippi County, AR, Monroe County, AR, Montgomery County, AR, Nevada County, AR, Perry County, AR, Pike County, AR, Poinsett County, AR, Polk County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Randolph County, AR, Saline County, AR, Scott County, AR, Sebastian County, AR, Sevier County, AR, Sharp County, AR, St. Francis County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Yell County, AR, Dunklin County, MO, Pemiscot County, MO, Choctaw County, OK, Haskell County, OK, Latimer County, OK, LeFlore County, OK, McCurtain County, OK, McIntosh County, OK, Muskogee County, OK, Okmulgee County, OK, Pittsburg County, OK, Pushmataha County, OK, Sequoyah County, OK, Benton County, TN, Carroll County, TN, Crockett County, TN, Dyer County, TN, Gibson County, TN, Haywood County, TN, Henry County, TN, Houston County, TN, Humphreys County, TN, Lake County, TN, Lauderdale County, TN, Obion County, TN, Shelby County, TN, Stewart County, TN, Tipton County, TN, Weakley County, TN
The radar
The Little Rock radar (KLZK), 64 km from the middle of the area, began a volume at 22:47 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
- 5%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
23 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 26, 5:47 PM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Pittsburg | 58 min |
| Jul 26, 5:50 PM CDT | Severe Thunderstorm Warning | LZK | Pope, Searcy, Stone, Van Buren | 25 min |
| Jul 26, 5:54 PM CDT | Severe Thunderstorm Warning | MEG | Clay, Randolph | 51 min |
| Jul 26, 6:00 PM CDT | Severe Thunderstorm Warning | LZK | Polk, Scott | 45 min |
| Jul 26, 6:02 PM CDT | Severe Thunderstorm Warning | LZK | Johnson, Logan, Pope, Yell | 28 min |
| Jul 26, 6:14 PM CDT | Severe Thunderstorm Warning | LZK | Conway, Faulkner, Van Buren | 31 min |
| Jul 26, 6:15 PM CDT | Severe Thunderstorm Warning | MEG | Lawrence, Randolph | 45 min |
| Jul 26, 6:26 PM CDT | Severe Thunderstorm Warning | MEG | Clay | 49 min |
| Jul 26, 6:31 PM CDT | Severe Thunderstorm Warning | LZK | Conway, Perry, Pope, Yell | 44 min |
| Jul 26, 6:32 PM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Muskogee, Okmulgee | 58 min |
| Jul 26, 6:37 PM CDT | Severe Thunderstorm Warning | TSA | Choctaw, Pushmataha | 68 min |
| Jul 26, 6:45 PM CDT | Severe Thunderstorm Warning | TSA | Latimer, Pittsburg | 60 min |
| Jul 26, 6:47 PM CDT | Severe Thunderstorm Warning | MEG | Lawrence, Randolph | 43 min |
| Jul 26, 7:05 PM CDT | Severe Thunderstorm Warning | MEG | Clay, Craighead, Greene | 40 min |
| Jul 26, 7:13 PM CDT | Severe Thunderstorm Warning | TSA | Pittsburg, Pushmataha | 34 min |
| Jul 26, 7:17 PM CDT | Severe Thunderstorm Warning | LZK | Cleburne, Independence, Jackson, White, Woodruff | 43 min |
| Jul 26, 7:18 PM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Okfuskee, Okmulgee | 57 min |
| Jul 26, 7:30 PM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Muskogee, Okmulgee | 60 min |
| Jul 26, 7:40 PM CDT | Severe Thunderstorm Warning | MEG | Clay, Craighead, Greene, Mississippi | 37 min |
| Jul 26, 7:46 PM CDT | Severe Thunderstorm Warning | TSA | Choctaw | 35 min |
| Jul 26, 7:52 PM CDT | Severe Thunderstorm Warning | SHV | McCurtain | 38 min |
| Jul 26, 7:59 PM CDT | Severe Thunderstorm Warning | LZK | Independence, Jackson, White, Woodruff | 31 min |
| Jul 26, 8:29 PM CDT | Severe Thunderstorm Warning | SHV | Sevier | 46 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
Springfield, MO (KSGF), launched 12:00Z, 10.8 hours before the alert went out and 211 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
- 854 J/kg
- Mixed-layer CIN
- -110 J/kg
- Mixed-layer LCL
- 1336 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 108 m²/s²
- 0-3 km storm-relative helicity
- 168 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 26, 1:44 PM CDT | Mesoscale Discussion | SPC | Baxter, Boone, Carroll, Clay, Cleburne, Conway and 24 more | 3 hr |
| Jul 26, 5:27 PM CDT | Mesoscale Discussion | SPC | Clark, Clay, Cleburne, Conway, Craighead, Crittenden and 42 more | 33 min |
| Jul 26, 6:29 PM CDT | Mesoscale Discussion | SPC | Clay | 61 min |
| Jul 26, 11:26 AM CDT | Mesoscale Discussion | SPC | Boone, Bracken, Campbell, Carroll, Gallatin, Grant and 11 more | 2 hr |
| Jul 26, 12:16 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Bracken, Campbell, Carroll, Gallatin, Grant and 7 more | 9 hr |
| Jul 26, 1:25 PM CDT | Mesoscale Discussion | SPC | Ballard, Carlisle, Livingston, McCracken | 65 min |
| Jul 26, 1:46 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Allen, Anderson, Ballard, Barren, Bourbon and 65 more | 10 hr |
| Jul 26, 2:37 PM CDT | Mesoscale Discussion | SPC | Boone, Boyd, Bracken, Campbell, Carter, Fleming and 8 more | 113 min |
| Jul 26, 3:55 PM CDT | Mesoscale Discussion | SPC | Anderson, Ballard, Breckinridge, Bullitt, Butler, Caldwell and 39 more | 35 min |
| Jul 26, 3:57 PM CDT | Mesoscale Discussion | SPC | Bath, Bourbon, Breathitt, Carter, Casey, Clark and 30 more | 2 hr |
| Jul 26, 5:06 PM CDT | Mesoscale Discussion | SPC | Boyd, Greenup, Lewis | 84 min |
| Jul 26, 5:26 PM CDT | Severe Thunderstorm Watch | SPC | Bath, Boyd, Breathitt, Carter, Clay, Elliott and 24 more | 7 hr |
| Jul 25, 7:21 PM CDT | Mesoscale Discussion | SPC | Atchison | 54 min |
| Jul 26, 2:23 PM CDT | Mesoscale Discussion | SPC | Jefferson | 2 hr |
Nearby
Severe Thunderstorm Watches in Arkansas, 2012Severe Thunderstorm Watches in Tennessee, 2012Severe Thunderstorm Watches in Oklahoma, 2012Every severe thunderstorm watch in 2012
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.