Alert archive / Arkansas / Severe Thunderstorm Watches in 2005
Severe Thunderstorm Watch 19
The Storm Prediction Center issued this severe thunderstorm watch at Feb 20, 2005, 9:10 PM CST for 35 counties in Arkansas. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 20, 2005, 9:10 PM CST (03:10 UTC)
- Expired
- Feb 21, 2005, 3:00 AM CST
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 35 counties
Baxter County, AR, Benton County, AR, Boone County, AR, Carroll County, AR, Cleburne County, AR, Conway County, AR, Crawford County, AR, Faulkner County, AR, Franklin County, AR, Fulton County, AR, Garland County, AR, Independence County, AR, Izard County, AR, Johnson County, AR, Logan County, AR, Lonoke County, AR, Madison County, AR, Marion County, AR, Montgomery County, AR, Newton County, AR, Perry County, AR, Polk County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, Scott County, AR, Searcy County, AR, Sebastian County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, Washington County, AR, White County, AR, Yell County, AR
The radar
The Western Arkansas radar (KSRX), 109 km from the middle of the area, began a volume at 03:11 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.
Warnings issued inside it
10 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 20, 9:22 PM CST | Severe Thunderstorm Warning | LZK | Logan | 38 min |
| Feb 20, 9:48 PM CST | Severe Thunderstorm Warning | LZK | Faulkner | 27 min |
| Feb 20, 10:10 PM CST | Severe Thunderstorm Warning | LZK | White | 65 min |
| Feb 20, 10:15 PM CST | Severe Thunderstorm Warning | LZK | Pope | 30 min |
| Feb 20, 10:27 PM CST | Severe Thunderstorm Warning | LZK | Saline | 48 min |
| Feb 20, 10:30 PM CST | Severe Thunderstorm Warning | LZK | Conway | 45 min |
| Feb 20, 10:57 PM CST | Severe Thunderstorm Warning | LZK | Faulkner | 48 min |
| Feb 20, 11:34 PM CST | Severe Thunderstorm Warning | LZK | White | 41 min |
| Feb 21, 2:23 AM CST | Severe Thunderstorm Warning | LZK | Johnson, Newton | 52 min |
| Feb 21, 2:56 AM CST | Severe Thunderstorm Warning | LZK | Pope, Searcy | 64 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 00:00Z, 3.2 hours before the alert went out and 147 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
- 424 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 1413 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 69 m²/s²
- 0-3 km storm-relative helicity
- 134 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.3
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 20, 8:51 PM CST | Mesoscale Discussion | SPC | Baxter, Boone, Carroll, Cleburne, Conway, Crawford and 27 more | 114 min |
| Feb 20, 11:22 PM CST | Mesoscale Discussion | SPC | Baxter, Benton, Boone, Carroll, Clay, Cleburne and 42 more | 113 min |
| Feb 21, 12:30 AM CST | Severe Thunderstorm Watch | SPC | Clay, Craighead, Crittenden, Cross, Greene, Jackson and 8 more | 6 hr |
| Feb 21, 2:10 AM CST | Mesoscale Discussion | SPC | Baxter, Benton, Boone, Carroll, Clay, Cleburne and 43 more | 95 min |
| Feb 21, 2:30 AM CST | Severe Thunderstorm Watch | SPC | Baxter, Boone, Cleburne, Conway, Fulton, Independence and 11 more | 4 hr |
| Feb 21, 4:29 AM CST | Mesoscale Discussion | SPC | Baxter, Boone, Clay, Cleburne, Conway, Craighead and 16 more | 2 hr |
| Feb 21, 5:45 AM CST | Severe Thunderstorm Watch | SPC | Clay, Craighead, Crittenden, Cross, Greene, Lee and 4 more | 3 hr |
| Feb 21, 7:50 AM CST | Mesoscale Discussion | SPC | Clay, Craighead, Crittenden, Cross, Greene, Lee and 4 more | 55 min |
| Feb 21, 3:58 PM CST | Mesoscale Discussion | SPC | Arkansas, Desha, Drew, Jefferson, Lincoln, Phillips | 92 min |
Nearby
Severe Thunderstorm Watches in Arkansas, 2005Every severe thunderstorm watch in 2005
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.