Alert archive / Arkansas / Mesoscale Discussions in 2017
Mesoscale Discussion 1083
The Storm Prediction Center issued this mesoscale discussion at Jun 18, 2017, 8:05 AM CDT for 36 counties in Arkansas. It was in force for 115 min.
The area
The outline as issued.
The facts
- Issued
- Jun 18, 2017, 8:05 AM CDT (13:05 UTC)
- Expired
- Jun 18, 2017, 10:00 AM CDT
- In force
- 115 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 36 counties
Baxter County, AR, Boone County, AR, Cleburne County, AR, Conway County, AR, Crawford County, AR, Faulkner County, AR, Franklin County, AR, Fulton County, AR, Garland County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Johnson County, AR, Lawrence County, AR, Logan County, AR, Lonoke County, AR, Madison County, AR, Marion County, AR, Monroe County, AR, Montgomery County, AR, Newton County, AR, Perry County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, Scott County, AR, Searcy County, AR, Sebastian County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, Washington County, AR, White County, AR, Woodruff County, AR, Yell County, AR
The radar
The Little Rock radar (KLZK), 65 km from the middle of the area, began a volume at 13:05 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 12:00Z, 1.1 hours before the alert went out and 204 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
- 22 J/kg
- Mixed-layer CIN
- -256 J/kg
- Mixed-layer LCL
- 1256 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- -16 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 |
|---|---|---|---|---|
| Jun 18, 4:14 AM CDT | Severe Thunderstorm Watch | SPC | Crawford, Franklin, Madison, Sebastian, Washington | 6 hr |
| Jun 18, 9:43 AM CDT | Severe Thunderstorm Watch | SPC | Arkansas, Clark, Cleburne, Cleveland, Conway, Craighead and 37 more | 6 hr |
| Jun 18, 12:36 PM CDT | Mesoscale Discussion | SPC | Arkansas, Cleburne, Cleveland, Craighead, Crittenden, Cross and 20 more | 114 min |
| Jun 18, 1:48 PM CDT | Mesoscale Discussion | SPC | Crittenden, Cross, Lee, Mississippi, Monroe, Phillips and 3 more | 117 min |
Nearby
Mesoscale Discussions in Arkansas, 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.