Alert archive / Arkansas / Mesoscale Discussions in 2014
Mesoscale Discussion 1320
The Storm Prediction Center issued this mesoscale discussion at Jul 8, 2014, 5:15 PM CDT for 32 counties in Arkansas; Adair County, Sequoyah County, Oklahoma. It was in force for 60 min.
The area
The outline as issued.
The facts
- Issued
- Jul 8, 2014, 5:15 PM CDT (22:15 UTC)
- Expired
- Jul 8, 2014, 6:15 PM CDT
- In force
- 60 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 34 counties
Cleburne County, AR, Conway County, AR, Craighead County, AR, Crawford County, AR, Cross County, AR, Faulkner County, AR, Franklin County, AR, Greene 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, Newton County, AR, Perry County, AR, Poinsett County, AR, Pope County, AR, Prairie County, AR, Pulaski 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, Adair County, OK, Sequoyah County, OK
The radar
The Little Rock radar (KLZK), 94 km from the middle of the area, began a volume at 22:16 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
Little Rock, AR (KBYH), launched 12:00Z, 10.3 hours before the alert went out and 271 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
- 1296 J/kg
- Mixed-layer CIN
- -91 J/kg
- Mixed-layer LCL
- 1067 m above ground
- 0-6 km bulk shear
- 1 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 182 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Jul 8, 5:56 PM CDT | Severe Thunderstorm Watch | SPC | Arkansas, Cleburne, Conway, Craighead, Crittenden, Cross and 28 more | 5 hr |
| Jul 8, 6:06 PM CDT | Mesoscale Discussion | SPC | Caddo, Cleveland, Coal, Comanche, Garvin, Grady and 9 more | 54 min |
Nearby
Mesoscale Discussions in Arkansas, 2014Mesoscale Discussions in Oklahoma, 2014Every mesoscale discussion in 2014
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.