Alert archive / Arkansas / Mesoscale Discussions in 2008
Mesoscale Discussion 685
The Storm Prediction Center issued this mesoscale discussion at Apr 22, 2008, 10:12 AM CDT for 37 counties in Arkansas; 9 counties in Missouri; 11 counties in Oklahoma. It was in force for 93 min.
The area
The outline as issued.
The facts
- Issued
- Apr 22, 2008, 10:12 AM CDT (15:12 UTC)
- Expired
- Apr 22, 2008, 11:45 AM CDT
- In force
- 93 min
- Issued by
- the Storm Prediction Center
All 57 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, Jackson County, AR, Johnson County, AR, Lawrence 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, 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, Woodruff County, AR, Yell County, AR, Barry County, MO, Christian County, MO, Douglas County, MO, Howell County, MO, McDonald County, MO, Oregon County, MO, Ozark County, MO, Stone County, MO, Taney County, MO, Adair County, OK, Cherokee County, OK, Delaware County, OK, Haskell County, OK, Latimer County, OK, LeFlore County, OK, McIntosh County, OK, Muskogee County, OK, Pittsburg County, OK, Sequoyah County, OK, Wagoner County, OK
The radar
The Western Arkansas radar (KSRX), 99 km from the middle of the area, began a volume at 15:11 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.
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 3.2 hours before the alert went out and 121 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
- 2654 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 645 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 374 m²/s²
- 0-3 km storm-relative helicity
- 353 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 13.7
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 22, 7:42 AM CDT | Mesoscale Discussion | SPC | Baxter, Benton, Boone, Carroll, Fulton, Izard and 8 more | 63 min |
| Apr 22, 7:49 AM CDT | Severe Thunderstorm Watch | SPC | Baxter, Benton, Boone, Carroll, Crawford, Franklin and 10 more | 6 hr |
| Apr 22, 10:47 AM CDT | Severe Thunderstorm Watch | SPC | Arkansas, Clark, Cleburne, Cleveland, Conway, Craighead and 40 more | 5 hr |
| Apr 22, 12:16 PM CDT | Mesoscale Discussion | SPC | Arkansas, Baxter, Benton, Boone, Carroll, Clark and 48 more | 89 min |
| Apr 22, 1:51 PM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 25 more | 54 min |
| Apr 22, 2:06 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more | 7 hr |
| Apr 22, 2:33 PM CDT | Severe Thunderstorm Watch | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 35 more | 6 hr |
| Apr 22, 3:30 PM CDT | Mesoscale Discussion | SPC | Benton, Carroll, Crawford, Madison, Washington | 90 min |
| Apr 22, 3:52 PM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 26 more | 83 min |
| Apr 22, 6:51 PM CDT | Mesoscale Discussion | SPC | Benton, Carroll, Crawford, Garland, Logan, Madison and 7 more | 114 min |
| Apr 21, 7:03 PM CDT | Severe Thunderstorm Watch | SPC | Andrew, Buchanan, Clinton, DeKalb, Holt, Platte | 7 hr |
| Apr 21, 10:38 PM CDT | Mesoscale Discussion | SPC | Andrew, Buchanan, Clinton, DeKalb, Holt, Platte | 2 hr |
| Apr 22, 1:14 AM CDT | Mesoscale Discussion | SPC | Barton, Bates, Caldwell, Cass, Cedar, Clay and 10 more | 91 min |
| Apr 22, 9:41 AM CDT | Mesoscale Discussion | SPC | Cape Girardeau, Perry, Scott | 94 min |
| Apr 21, 7:34 PM CDT | Mesoscale Discussion | SPC | Carter, Cleveland, Creek, Garfield, Garvin, Kingfisher and 9 more | 86 min |
| Apr 21, 8:56 PM CDT | Tornado Watch | SPC | Carter, Cleveland, Coal, Creek, Garvin, Hughes and 11 more | 5 hr |
| Apr 21, 10:29 PM CDT | Mesoscale Discussion | SPC | Carter, Cleveland, Coal, Creek, Garvin, Hughes and 11 more | 91 min |
Nearby
Mesoscale Discussions in Arkansas, 2008Mesoscale Discussions in Oklahoma, 2008Mesoscale Discussions in Missouri, 2008Every mesoscale discussion in 2008
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.