Alert archive / Arkansas / Mesoscale Discussions in 2013
Mesoscale Discussion 1633
The Storm Prediction Center issued this mesoscale discussion at Aug 6, 2013, 1:04 AM CDT for 20 counties in Arkansas; 10 counties in Missouri. It was in force for 86 min.
The area
The outline as issued.
The facts
- Issued
- Aug 6, 2013, 1:04 AM CDT (06:04 UTC)
- Expired
- Aug 6, 2013, 2:30 AM CDT
- In force
- 86 min
- Issued by
- the Storm Prediction Center
All 30 counties
Baxter County, AR, Boone County, AR, Carroll County, AR, Cleburne County, AR, Conway County, AR, Faulkner County, AR, Fulton County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Lonoke County, AR, Marion County, AR, Monroe County, AR, Newton County, AR, Prairie County, AR, Searcy County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Christian County, MO, Dallas County, MO, Douglas County, MO, Greene County, MO, Ozark County, MO, Polk County, MO, Stone County, MO, Taney County, MO, Webster County, MO, Wright County, MO
The radar
The Springfield radar (KSGF), 130 km from the middle of the area, began a volume at 06:05 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 nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 6.1 hours before the alert went out and 129 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
- 2876 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 723 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 185 m²/s²
- 0-3 km storm-relative helicity
- 311 m²/s²
- Significant tornado parameter
- 3.6
- Supercell composite
- 17.1
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 5, 9:44 PM CDT | Mesoscale Discussion | SPC | Barton | 2 hr |
| Aug 5, 11:51 PM CDT | Severe Thunderstorm Watch | SPC | Barry, Barton, Cedar, Dade, Jasper, Lawrence and 3 more | 4 hr |
| Aug 6, 6:51 PM CDT | Severe Thunderstorm Watch | SPC | Clark, Scotland | 3 hr |
Nearby
Mesoscale Discussions in Arkansas, 2013Mesoscale Discussions in Missouri, 2013Every mesoscale discussion in 2013
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.