Alert archive / Arkansas / Mesoscale Discussions in 2008
Mesoscale Discussion 2265
The Storm Prediction Center issued this mesoscale discussion at Sep 13, 2008, 7:37 PM CDT for 50 counties in Arkansas; McCurtain County, Oklahoma. It was in force for 53 min.
The area
The outline as issued.
The facts
- Issued
- Sep 13, 2008, 7:37 PM CDT (00:37 UTC)
- Expired
- Sep 13, 2008, 8:30 PM CDT
- In force
- 53 min
- Issued by
- the Storm Prediction Center
All 51 counties
Arkansas County, AR, Baxter County, AR, Boone County, AR, Bradley County, AR, Calhoun County, AR, Clark County, AR, Cleburne County, AR, Cleveland County, AR, Conway County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Faulkner County, AR, Fulton County, AR, Garland County, AR, Grant 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, Lincoln County, AR, Little River County, AR, Logan County, AR, Lonoke County, AR, Marion County, AR, Monroe County, AR, Montgomery County, AR, Nevada County, AR, Newton County, AR, Ouachita County, AR, Perry County, AR, Pike County, AR, Polk County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, Scott County, AR, Searcy County, AR, Sevier County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Yell County, AR, McCurtain County, OK
The radar
The Little Rock radar (KLZK), 94 km from the middle of the area, began a volume at 00:37 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 nearest sounding before it
Shreveport, LA (KSHV), launched 00:00Z, 0.6 hours before the alert went out and 240 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
- 438 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 543 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 399 m²/s²
- 0-3 km storm-relative helicity
- 419 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 7.4
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 |
|---|---|---|---|---|
| Sep 13, 7:03 PM CDT | Tornado Watch | SPC | Ashley, Chicot, Columbia, Union | 7 hr |
| Sep 13, 11:03 PM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Baxter, Boone, Bradley, Chicot and 33 more | 57 min |
| Sep 14, 1:28 AM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Chicot, Desha, Drew, Phillips | 92 min |
| Sep 14, 1:57 AM CDT | Tornado Watch | SPC | Ashley, Chicot, Clay, Craighead, Crittenden, Cross and 8 more | 8 hr |
| Sep 14, 2:06 AM CDT | Mesoscale Discussion | SPC | Baxter, Boone, Fulton, Marion | 84 min |
| Sep 14, 6:24 AM CDT | Mesoscale Discussion | SPC | Ashley, Chicot, Clay, Craighead, Crittenden, Cross and 8 more | 96 min |
Nearby
Mesoscale Discussions in Arkansas, 2008Mesoscale Discussions in Oklahoma, 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.