Alert archive / Arkansas / Mesoscale Discussions in 2017
Mesoscale Discussion 434
The Storm Prediction Center issued this mesoscale discussion at Apr 4, 2017, 9:28 PM CDT for 4 states. It was in force for 92 min.
The area
The outline as issued.
The facts
- Issued
- Apr 4, 2017, 9:28 PM CDT (02:28 UTC)
- Expired
- Apr 4, 2017, 11:00 PM CDT
- In force
- 92 min
- Issued by
- the Storm Prediction Center
All 64 counties
Baxter County, AR, Boone County, AR, Carroll County, AR, Clark County, AR, Cleburne County, AR, Conway County, AR, Crawford County, AR, Faulkner County, AR, Franklin County, AR, Fulton County, AR, Garland County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Izard County, AR, Johnson County, AR, Little River County, AR, Logan County, AR, Madison County, AR, Marion County, AR, Miller County, AR, Montgomery County, AR, Nevada County, AR, Newton County, AR, Perry County, AR, Pike County, AR, Polk County, AR, Pope County, AR, Saline County, AR, Scott County, AR, Searcy County, AR, Sebastian County, AR, Sevier County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, Washington County, AR, Yell County, AR, Christian County, MO, Dallas County, MO, Dent County, MO, Douglas County, MO, Greene County, MO, Howell County, MO, Laclede County, MO, Oregon County, MO, Ozark County, MO, Phelps County, MO, Pulaski County, MO, Shannon County, MO, Stone County, MO, Taney County, MO, Texas County, MO, Webster County, MO, Wright County, MO, LeFlore County, OK, McCurtain County, OK, Bowie County, TX, Camp County, TX, Cass County, TX, Franklin County, TX, Morris County, TX, Red River County, TX, Titus County, TX
The radar
The Western Arkansas radar (KSRX), 68 km from the middle of the area, began a volume at 02:32 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
Springfield, MO (KSGF), launched 00:00Z, 2.5 hours before the alert went out and 177 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
- 326 J/kg
- Mixed-layer CIN
- -51 J/kg
- Mixed-layer LCL
- 1384 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 312 m²/s²
- 0-3 km storm-relative helicity
- 743 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 12.5
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 4, 9:12 PM CDT | Severe Thunderstorm Watch | SPC | Baxter, Boone, Conway, Fulton, Garland, Hempstead and 19 more | 4 hr |
| Apr 4, 11:38 PM CDT | Mesoscale Discussion | SPC | Baxter, Cleburne, Conway, Faulkner, Fulton, Garland and 9 more | 97 min |
| Apr 4, 7:40 PM CDT | Mesoscale Discussion | SPC | Barry, Christian, Greene, Lawrence, Stone | 65 min |
Nearby
Mesoscale Discussions in Arkansas, 2017Mesoscale Discussions in Missouri, 2017Mesoscale Discussions in Texas, 2017Every mesoscale discussion in 2017
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.