Alert archive / Arkansas / Mesoscale Discussions in 2012
Mesoscale Discussion 2025
The Storm Prediction Center issued this mesoscale discussion at Oct 5, 2012, 4:29 PM CDT for 24 counties in Arkansas; DeSoto County, Tunica County, Mississippi; 4 counties in Tennessee. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Oct 5, 2012, 4:29 PM CDT (21:29 UTC)
- Expired
- Oct 5, 2012, 6:30 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 30 counties
Arkansas County, AR, Clark County, AR, Crittenden County, AR, Cross County, AR, Faulkner County, AR, Garland County, AR, Grant County, AR, Hot Spring County, AR, Howard County, AR, Jackson County, AR, Jefferson County, AR, Lee County, AR, Lonoke County, AR, Mississippi County, AR, Monroe County, AR, Phillips County, AR, Pike County, AR, Poinsett County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, St. Francis County, AR, White County, AR, Woodruff County, AR, DeSoto County, MS, Tunica County, MS, Haywood County, TN, Lauderdale County, TN, Shelby County, TN, Tipton County, TN
The radar
The Little Rock radar (KLZK), 33 km from the middle of the area, began a volume at 21:32 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, 9.5 hours before the alert went out and 182 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
- 35 J/kg
- Mixed-layer CIN
- -268 J/kg
- Mixed-layer LCL
- 1164 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 47 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
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 |
|---|---|---|---|---|
| Oct 4, 10:54 PM CDT | Mesoscale Discussion | SPC | Benton | 3 hr |
| Oct 5, 11:16 AM CDT | Mesoscale Discussion | SPC | Baxter, Clay, Cleburne, Conway, Craighead, Faulkner and 23 more | 119 min |
Nearby
Mesoscale Discussions in Arkansas, 2012Mesoscale Discussions in Tennessee, 2012Mesoscale Discussions in Mississippi, 2012Every mesoscale discussion in 2012
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.