Alert archive / Arkansas / Mesoscale Discussions in 2015
Mesoscale Discussion 1634
The Storm Prediction Center issued this mesoscale discussion at Aug 7, 2015, 5:41 PM CDT for 38 counties in Arkansas; 12 counties in Mississippi. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 7, 2015, 5:41 PM CDT (22:41 UTC)
- Expired
- Aug 7, 2015, 8:15 PM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 50 counties
Arkansas County, AR, Baxter County, AR, Boone County, AR, Cleburne County, AR, Conway County, AR, Crittenden County, AR, Cross County, AR, Desha County, AR, Faulkner County, AR, Garland County, AR, Grant County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Jefferson County, AR, Johnson County, AR, Lee County, AR, Lincoln County, AR, Logan County, AR, Lonoke County, AR, Marion County, AR, Monroe County, AR, Newton County, AR, Perry County, AR, Phillips County, AR, Poinsett County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, Searcy County, AR, Sharp County, AR, St. Francis County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Yell County, AR, Bolivar County, MS, Coahoma County, MS, DeSoto County, MS, Grenada County, MS, Leflore County, MS, Panola County, MS, Quitman County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tunica County, MS, Yalobusha County, MS
The radar
The Little Rock radar (KLZK), 53 km from the middle of the area, began a volume at 22:43 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
Little Rock, AR (KBYH), launched 12:00Z, 10.7 hours before the alert went out and 160 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
- 1503 J/kg
- Mixed-layer CIN
- -218 J/kg
- Mixed-layer LCL
- 1190 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 182 m²/s²
- 0-3 km storm-relative helicity
- 168 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
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 7, 8:39 AM CDT | Mesoscale Discussion | SPC | Lee, Monroe, Phillips, Prairie | 66 min |
| Aug 7, 10:22 AM CDT | Severe Thunderstorm Watch | SPC | Attala, Calhoun, Carroll, Chickasaw, Choctaw, Clay and 14 more | 4 hr |
Nearby
Mesoscale Discussions in Arkansas, 2015Mesoscale Discussions in Mississippi, 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.