Alert archive / Arkansas / Mesoscale Discussions in 2019
Mesoscale Discussion 76
The Storm Prediction Center issued this mesoscale discussion at Feb 6, 2019, 3:41 PM CST for 25 counties in Arkansas; McCurtain County, Oklahoma. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 6, 2019, 3:41 PM CST (21:41 UTC)
- Expired
- Feb 6, 2019, 5:45 PM CST
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 26 counties
Conway County, AR, Cross County, AR, Faulkner County, AR, Garland County, AR, Grant County, AR, Hot Spring County, AR, Howard County, AR, Jefferson County, AR, Lee County, AR, Little River County, AR, Lonoke County, AR, Monroe County, AR, Montgomery County, AR, Perry County, AR, Pike County, AR, Polk County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, Scott County, AR, Sevier County, AR, St. Francis County, AR, White County, AR, Woodruff County, AR, Yell County, AR, McCurtain County, OK
The radar
The Little Rock radar (KLZK), 81 km from the middle of the area, began a volume at 21:43 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 (KBYH), launched 12:00Z, 9.7 hours before the alert went out and 289 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
- 77 J/kg
- Mixed-layer CIN
- -52 J/kg
- Mixed-layer LCL
- 615 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 185 m²/s²
- 0-3 km storm-relative helicity
- 237 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 5, 7:32 PM CST | Mesoscale Discussion | SPC | Atoka, Bryan, Carter, Choctaw, Coal, Garvin and 8 more | 2 hr |
| Feb 6, 5:58 PM CST | Mesoscale Discussion | SPC | Beckham, Blaine, Caddo, Canadian, Comanche, Custer and 6 more | 2 hr |
Nearby
Mesoscale Discussions in Arkansas, 2019Mesoscale Discussions in Oklahoma, 2019Every mesoscale discussion in 2019
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.