Alert archive / Arkansas / Mesoscale Discussions in 2015
Mesoscale Discussion 1742
The Storm Prediction Center issued this mesoscale discussion at Aug 23, 2015, 4:31 AM CDT for 15 counties in Arkansas; 8 counties in Missouri. It was in force for 59 min.
The area
The outline as issued.
The facts
- Issued
- Aug 23, 2015, 4:31 AM CDT (09:31 UTC)
- Expired
- Aug 23, 2015, 5:30 AM CDT
- In force
- 59 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 23 counties
Baxter County, AR, Benton County, AR, Boone County, AR, Carroll County, AR, Cleburne County, AR, Fulton County, AR, Izard County, AR, Johnson County, AR, Madison County, AR, Marion County, AR, Newton County, AR, Pope County, AR, Searcy County, AR, Stone County, AR, Van Buren County, AR, Barry County, MO, Christian County, MO, Douglas County, MO, McDonald County, MO, Ozark County, MO, Stone County, MO, Taney County, MO, Webster County, MO
The radar
The Springfield radar (KSGF), 86 km from the middle of the area, began a volume at 09:32 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 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, 9.5 hours before the alert went out and 71 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
- 1914 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 841 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 381 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 3.4
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 22, 7:00 PM CDT | Mesoscale Discussion | SPC | Arkansas, Chicot, Desha, Drew, Phillips | 2 hr |
| Aug 23, 4:51 AM CDT | Severe Thunderstorm Watch | SPC | Baxter, Benton, Boone, Carroll, Conway, Franklin and 12 more | 3 hr |
| Aug 23, 6:54 AM CDT | Mesoscale Discussion | SPC | Franklin, Johnson, Pope, Stone, Van Buren | 66 min |
| Aug 22, 8:49 PM CDT | Mesoscale Discussion | SPC | Andrew, Atchison, Buchanan, Clay, Clinton, Daviess and 8 more | 116 min |
Nearby
Mesoscale Discussions in Arkansas, 2015Mesoscale Discussions in Missouri, 2015Every mesoscale discussion in 2015
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.