Alert archive / Arkansas / Mesoscale Discussions in 2019
Mesoscale Discussion 85
The Storm Prediction Center issued this mesoscale discussion at Feb 7, 2019, 1:55 AM CST for 15 counties in Arkansas; LeFlore County, Oklahoma. It was in force for 65 min.
The area
The outline as issued.
The facts
- Issued
- Feb 7, 2019, 1:55 AM CST (07:55 UTC)
- Expired
- Feb 7, 2019, 3:00 AM CST
- In force
- 65 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
Counties Baxter County, AR, Crawford County, AR, Franklin County, AR, Izard County, AR, Johnson County, AR, Logan County, AR, Madison County, AR, Marion County, AR, Newton County, AR, Pope County, AR, Scott County, AR, Searcy County, AR, Sebastian County, AR, Stone County, AR, Van Buren County, AR, LeFlore County, OK
The radar
The Western Arkansas radar (KSRX), 62 km from the middle of the area, began a volume at 07:55 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 00:00Z, 7.9 hours before the alert went out and 150 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 425 m above ground
- 0-6 km bulk shear
- 69 kt
- 0-1 km storm-relative helicity
- 399 m²/s²
- 0-3 km storm-relative helicity
- 372 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 7, 2:21 AM CST | Severe Thunderstorm Watch | SPC | Baxter, Boone, Carroll, Cleburne, Conway, Crawford and 20 more | 6 hr |
| Feb 7, 3:36 AM CST | Mesoscale Discussion | SPC | Howard, Little River, Montgomery, Pike, Polk, Sevier | 54 min |
| Feb 7, 5:23 AM CST | Mesoscale Discussion | SPC | Baxter, Clay, Cleburne, Conway, Franklin, Fulton and 18 more | 67 min |
| Feb 7, 7:11 AM CST | Mesoscale Discussion | SPC | Clay, Cleburne, Craighead, Crittenden, Cross, Faulkner and 16 more | 64 min |
| Feb 6, 7:51 PM CST | Mesoscale Discussion | SPC | Alfalfa, Garfield, Grant, Kay, Major, Woods | 6 hr |
| Feb 6, 9:06 PM CST | Mesoscale Discussion | SPC | Craig, Kay, Nowata, Osage, Ottawa, Pawnee and 3 more | 114 min |
| Feb 6, 10:16 PM CST | Mesoscale Discussion | SPC | Caddo, Canadian, Carter, Cleveland, Comanche, Cotton and 15 more | 119 min |
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.