Alert archive / Arkansas / Mesoscale Discussions in 2019
Mesoscale Discussion 377
The Storm Prediction Center issued this mesoscale discussion at Apr 17, 2019, 9:20 PM CDT for 21 counties in Arkansas; 5 counties in Oklahoma. It was in force for 85 min.
The area
The outline as issued.
The facts
- Issued
- Apr 17, 2019, 9:20 PM CDT (02:20 UTC)
- Expired
- Apr 17, 2019, 10:45 PM CDT
- In force
- 85 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 26 counties
Boone County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Garland County, AR, Howard County, AR, Johnson County, AR, Logan County, AR, Madison County, AR, Marion County, AR, Montgomery County, AR, Newton County, AR, Pike County, AR, Polk County, AR, Pope County, AR, Scott County, AR, Searcy County, AR, Sebastian County, AR, Sevier County, AR, Washington County, AR, Yell County, AR, Latimer County, OK, LeFlore County, OK, McCurtain County, OK, Pushmataha County, OK, Sequoyah County, OK
The radar
The Western Arkansas radar (KSRX), 51 km from the middle of the area, began a volume at 02:21 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
Springfield, MO (KSGF), launched 00:00Z, 2.3 hours before the alert went out and 236 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
- 1253 J/kg
- Mixed-layer CIN
- -143 J/kg
- Mixed-layer LCL
- 1063 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 183 m²/s²
- 0-3 km storm-relative helicity
- 189 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 2.6
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 |
|---|---|---|---|---|
| Apr 18, 12:54 AM CDT | Mesoscale Discussion | SPC | Columbia, Hempstead, Lafayette, Little River, Miller, Nevada and 1 more | 66 min |
| Apr 18, 1:09 AM CDT | Severe Thunderstorm Watch | SPC | Columbia, Hempstead, Howard, Lafayette, Little River, Miller and 2 more | 7 hr |
| Apr 18, 1:15 AM CDT | Mesoscale Discussion | SPC | Arkansas, Baxter, Clark, Clay, Cleburne, Cleveland and 40 more | 60 min |
| Apr 18, 3:51 AM CDT | Mesoscale Discussion | SPC | Bradley, Calhoun, Cleveland, Columbia, Dallas, Hempstead and 5 more | 114 min |
| Apr 17, 7:49 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Craig, Custer, Dewey, Garfield and 12 more | 86 min |
| Apr 17, 9:30 PM CDT | Mesoscale Discussion | SPC | Bryan, Choctaw, Marshall | 90 min |
| Apr 17, 9:52 PM CDT | Mesoscale Discussion | SPC | Canadian, Craig, Creek, Kay, Lincoln, Logan and 11 more | 83 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.