Alert archive / Arkansas / Mesoscale Discussions in 2015
Mesoscale Discussion 1620
The Storm Prediction Center issued this mesoscale discussion at Aug 5, 2015, 3:53 PM CDT for 4 states. It was in force for 97 min.
The area
The outline as issued.
The facts
- Issued
- Aug 5, 2015, 3:53 PM CDT (20:53 UTC)
- Expired
- Aug 5, 2015, 5:30 PM CDT
- In force
- 97 min
- Issued by
- the Storm Prediction Center
All 26 counties
Craighead County, AR, Crittenden County, AR, Cross County, AR, Greene County, AR, Lee County, AR, Lonoke County, AR, Mississippi County, AR, Monroe County, AR, Phillips County, AR, Poinsett County, AR, Prairie County, AR, St. Francis County, AR, Woodruff County, AR, Dunklin County, MO, DeSoto County, MS, Panola County, MS, Tate County, MS, Tunica County, MS, Crockett County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Haywood County, TN, Lauderdale County, TN, Shelby County, TN, Tipton County, TN
The radar
The Memphis radar (KNQA), 98 km from the middle of the area, began a volume at 20:53 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 (KLZK), launched 12:00Z, 8.9 hours before the alert went out and 98 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
- 548 J/kg
- Mixed-layer CIN
- -93 J/kg
- Mixed-layer LCL
- 1601 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 100 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 5, 8:08 AM CDT | Mesoscale Discussion | SPC | Benton, Boone, Carroll, Crawford, Franklin, Johnson and 3 more | 97 min |
| Aug 5, 1:06 PM CDT | Mesoscale Discussion | SPC | Arkansas, Cleburne, Conway, Craighead, Crittenden, Cross and 28 more | 114 min |
| Aug 5, 1:59 PM CDT | Severe Thunderstorm Watch | SPC | Arkansas, Clay, Cleburne, Craighead, Crittenden, Cross and 21 more | 4 hr |
| Aug 5, 4:21 AM CDT | Severe Thunderstorm Watch | SPC | Barton, Jasper, McDonald, Newton, Vernon | 6 hr |
| Aug 5, 6:40 AM CDT | Mesoscale Discussion | SPC | Barton, Jasper, McDonald, Newton, Vernon | 95 min |
Nearby
Mesoscale Discussions in Arkansas, 2015Mesoscale Discussions in Tennessee, 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.