Alert archive / Arkansas / Mesoscale Discussions in 2015
Mesoscale Discussion 171
The Storm Prediction Center issued this mesoscale discussion at Mar 31, 2015, 8:50 PM CDT for 16 counties in Arkansas; Dunklin County, Pemiscot County, Missouri; 12 counties in Tennessee. It was in force for 85 min.
The area
The outline as issued.
The facts
- Issued
- Mar 31, 2015, 8:50 PM CDT (01:50 UTC)
- Expired
- Mar 31, 2015, 10:15 PM CDT
- In force
- 85 min
- Issued by
- the Storm Prediction Center
All 30 counties
Clay County, AR, Cleburne County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Faulkner County, AR, Greene County, AR, Jackson County, AR, Lonoke County, AR, Mississippi County, AR, Poinsett County, AR, Prairie County, AR, Pulaski County, AR, St. Francis County, AR, White County, AR, Woodruff County, AR, Dunklin County, MO, Pemiscot County, MO, Chester County, TN, Crockett County, TN, Dyer County, TN, Fayette County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Lauderdale County, TN, Madison County, TN, McNairy County, TN, Shelby County, TN, Tipton County, TN
The radar
The Memphis radar (KNQA), 60 km from the middle of the area, began a volume at 01:53 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 (KBYH), launched 00:00Z, 1.8 hours before the alert went out and 84 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
- 1687 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 1334 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 15 m²/s²
- Significant tornado parameter
- -0.1
- Supercell composite
- -1.1
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 |
|---|---|---|---|---|
| Mar 31, 8:14 PM CDT | Mesoscale Discussion | SPC | Crawford, Franklin, Sebastian | 91 min |
| Mar 31, 11:43 PM CDT | Mesoscale Discussion | SPC | Crittenden, Cross, Poinsett | 92 min |
| Apr 1, 1:16 AM CDT | Mesoscale Discussion | SPC | Polk, Scott | 89 min |
| Apr 1, 12:39 PM CDT | Mesoscale Discussion | SPC | Baxter, Benton, Boone, Carroll, Crawford, Franklin and 8 more | 3 hr |
| Apr 1, 5:14 PM CDT | Mesoscale Discussion | SPC | Arkansas, Baxter, Boone, Carroll, Clark, Clay and 54 more | 91 min |
Nearby
Mesoscale Discussions in Arkansas, 2015Mesoscale Discussions in Tennessee, 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.