Alert archive / Arkansas / Mesoscale Discussions in 2009
Mesoscale Discussion 165
The Storm Prediction Center issued this mesoscale discussion at Feb 27, 2009, 2:40 PM CST for 27 counties in Arkansas. It was in force for 65 min.
The area
The outline as issued.
The facts
- Issued
- Feb 27, 2009, 2:40 PM CST (20:40 UTC)
- Expired
- Feb 27, 2009, 3:45 PM CST
- In force
- 65 min
- Issued by
- the Storm Prediction Center
All 27 counties
Arkansas County, AR, Clark County, AR, Cleveland County, AR, Conway County, AR, Dallas County, AR, Desha County, AR, Faulkner County, AR, Franklin County, AR, Garland County, AR, Grant County, AR, Hot Spring County, AR, Jefferson County, AR, Johnson County, AR, Lincoln County, AR, Logan County, AR, Lonoke County, AR, Monroe County, AR, Montgomery County, AR, Perry County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, Scott County, AR, Van Buren County, AR, White County, AR, Yell County, AR
The radar
The Little Rock radar (KLZK), 41 km from the middle of the area, began a volume at 20:42 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
Little Rock, AR (KLZK), launched 12:00Z, 8.7 hours before the alert went out and 252 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
- 454 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 593 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 21 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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 |
|---|---|---|---|---|
| Feb 26, 6:12 PM CST | Severe Thunderstorm Watch | SPC | Baxter, Benton, Boone, Carroll, Clark, Cleburne and 40 more | 8 hr |
| Feb 26, 7:42 PM CST | Mesoscale Discussion | SPC | Baxter, Boone, Carroll, Clark, Clay, Cleburne and 41 more | 93 min |
| Feb 26, 8:29 PM CST | Mesoscale Discussion | SPC | Hempstead, Lafayette, Little River, Miller, Nevada | 2 hr |
| Feb 26, 9:09 PM CST | Mesoscale Discussion | SPC | Arkansas, Clay, Craighead, Crittenden, Cross, Grant and 12 more | 96 min |
| Feb 26, 9:40 PM CST | Severe Thunderstorm Watch | SPC | Arkansas, Bradley, Calhoun, Clay, Cleveland, Craighead and 20 more | 5 hr |
| Feb 26, 10:36 PM CST | Mesoscale Discussion | SPC | Arkansas, Baxter, Bradley, Calhoun, Clark, Clay and 46 more | 114 min |
| Feb 27, 1:45 AM CST | Mesoscale Discussion | SPC | Arkansas, Cleveland, Craighead, Crittenden, Cross, Dallas and 18 more | 30 min |
| Feb 27, 8:29 AM CST | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 10 more | 31 min |
| Feb 27, 8:40 AM CST | Severe Thunderstorm Watch | SPC | Ashley, Bradley, Calhoun, Chicot, Cleveland, Columbia and 7 more | 6 hr |
| Feb 27, 10:15 AM CST | Mesoscale Discussion | SPC | Ashley, Bradley, Calhoun, Chicot, Clark, Cleveland and 10 more | 90 min |
| Feb 27, 12:16 PM CST | Mesoscale Discussion | SPC | Chicot | 89 min |
| Feb 27, 12:38 PM CST | Tornado Watch | SPC | Ashley, Chicot | 7 hr |
Nearby
Mesoscale Discussions in Arkansas, 2009Every mesoscale discussion in 2009
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.