Alert archive / Arkansas / Severe Thunderstorm Watches in 2013
Severe Thunderstorm Watch 488
The Storm Prediction Center issued this severe thunderstorm watch at Aug 8, 2013, 5:32 PM CDT for 49 counties in Arkansas; 17 counties in Oklahoma. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 8, 2013, 5:32 PM CDT (22:32 UTC)
- Expired
- Aug 9, 2013, 12:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 66 counties
Baxter County, AR, Benton County, AR, Boone County, AR, Carroll County, AR, Clay County, AR, Cleburne County, AR, Conway County, AR, Craighead County, AR, Crawford County, AR, Crittenden County, AR, Cross County, AR, Faulkner County, AR, Franklin County, AR, Fulton County, AR, Garland County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Johnson County, AR, Lawrence County, AR, Lee County, AR, Logan County, AR, Lonoke County, AR, Madison County, AR, Marion County, AR, Mississippi County, AR, Monroe County, AR, Montgomery County, AR, Newton County, AR, Perry 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, Searcy County, AR, Sebastian County, AR, Sharp County, AR, St. Francis County, AR, Stone County, AR, Van Buren County, AR, Washington County, AR, White County, AR, Woodruff County, AR, Yell County, AR, Adair County, OK, Cherokee County, OK, Creek County, OK, Delaware County, OK, Haskell County, OK, Latimer County, OK, LeFlore County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Okfuskee County, OK, Okmulgee County, OK, Pittsburg County, OK, Rogers County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK
The radar
The Western Arkansas radar (KSRX), 53 km from the middle of the area, began a volume at 22:33 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
- 10%
- 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
- 30%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
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 |
|---|---|---|---|---|
| Aug 8, 5:35 PM CDT | Flash Flood Warning | TSA | Haskell, Latimer, LeFlore, Pittsburg | 6 hr |
| Aug 8, 5:41 PM CDT | Severe Thunderstorm Warning | TSA | Haskell, LeFlore, Sequoyah | 64 min |
| Aug 8, 5:51 PM CDT | Severe Thunderstorm Warning | LZK | Marion, Searcy | 39 min |
| Aug 8, 6:17 PM CDT | Severe Thunderstorm Warning | LZK | Baxter, Cleburne, Izard, Searcy, Stone, Van Buren | 43 min |
| Aug 8, 6:33 PM CDT | Severe Thunderstorm Warning | TSA | Crawford, Sebastian | 57 min |
| Aug 8, 6:37 PM CDT | Severe Thunderstorm Warning | TSA | Franklin | 38 min |
| Aug 8, 6:57 PM CDT | Severe Thunderstorm Warning | LZK | Cleburne, Independence, Stone | 48 min |
| Aug 8, 7:19 PM CDT | Severe Thunderstorm Warning | LZK | Johnson, Logan | 41 min |
| Aug 8, 8:17 PM CDT | Severe Thunderstorm Warning | LZK | Cleburne, Independence, Stone | 43 min |
| Aug 8, 8:39 PM CDT | Severe Thunderstorm Warning | LZK | Scott | 36 min |
| Aug 8, 9:43 PM CDT | Flash Flood Warning | LZK | Cleburne, Conway, Independence, Jackson, Pope, Van Buren and 1 more | 3 hr |
| Aug 8, 10:21 PM CDT | Severe Thunderstorm Warning | LZK | Montgomery, Polk, Scott | 24 min |
| Aug 8, 11:28 PM CDT | Flash Flood Warning | LZK | Lonoke, Prairie, White, Woodruff | 2 hr |
| Aug 8, 11:56 PM CDT | Flash Flood Warning | MEG | Craighead, Lawrence | 3 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 12:00Z, 10.5 hours before the alert went out and 144 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
- 195 J/kg
- Mixed-layer CIN
- -51 J/kg
- Mixed-layer LCL
- 651 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- -14 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 |
|---|---|---|---|---|
| Aug 8, 3:57 AM CDT | Severe Thunderstorm Watch | SPC | Benton, Carroll, Madison, Washington | 3 hr |
| Aug 8, 5:24 PM CDT | Mesoscale Discussion | SPC | Baxter, Benton, Boone, Carroll, Clay, Cleburne and 22 more | 66 min |
| Aug 7, 8:16 PM CDT | Mesoscale Discussion | SPC | Beaver, Cimarron, Texas | 89 min |
| Aug 7, 9:02 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Custer, Dewey, Ellis, Garfield and 6 more | 88 min |
| Aug 7, 10:24 PM CDT | Severe Thunderstorm Watch | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Custer and 17 more | 7 hr |
| Aug 7, 11:30 PM CDT | Mesoscale Discussion | SPC | Beaver, Texas | 60 min |
| Aug 8, 3:18 AM CDT | Mesoscale Discussion | SPC | Creek, Kay, Lincoln, Logan, Noble, Nowata and 7 more | 87 min |
| Aug 8, 3:00 PM CDT | Mesoscale Discussion | SPC | Beaver, Beckham, Cimarron, Ellis, Greer, Harmon and 2 more | 60 min |
| Aug 8, 3:21 PM CDT | Severe Thunderstorm Watch | SPC | Beaver, Beckham, Cimarron, Custer, Dewey, Greer and 7 more | 9 hr |
| Aug 8, 5:02 PM CDT | Mesoscale Discussion | SPC | Blaine, Caddo, Canadian, Carter, Cleveland, Coal and 30 more | 88 min |
| Aug 8, 6:23 PM CDT | Severe Thunderstorm Watch | SPC | Atoka, Blaine, Bryan, Caddo, Canadian, Carter and 22 more | 8 hr |
| Aug 8, 6:47 PM CDT | Mesoscale Discussion | SPC | Beaver, Beckham, Cimarron, Custer, Dewey, Greer and 7 more | 88 min |
Nearby
Severe Thunderstorm Watches in Arkansas, 2013Severe Thunderstorm Watches in Oklahoma, 2013Every severe thunderstorm watch in 2013
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.