Alert archive / Arkansas / Mesoscale Discussions in 2020
Mesoscale Discussion 1601
The Storm Prediction Center issued this mesoscale discussion at Aug 27, 2020, 5:50 PM CDT for 16 counties in Arkansas; 6 counties in Mississippi; Lauderdale County, Shelby County, Tipton County, Tennessee. It was in force for 115 min.
The area
The outline as issued.
The facts
- Issued
- Aug 27, 2020, 5:50 PM CDT (22:50 UTC)
- Expired
- Aug 27, 2020, 7:45 PM CDT
- In force
- 115 min
- Issued by
- the Storm Prediction Center
- Concerning
- Tornado watch 458
All 25 counties
Cleburne County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Faulkner County, AR, Independence County, AR, Jackson County, AR, Lee County, AR, Mississippi County, AR, Monroe County, AR, Phillips County, AR, Poinsett County, AR, Prairie County, AR, St. Francis County, AR, White County, AR, Woodruff County, AR, Coahoma County, MS, DeSoto County, MS, Panola County, MS, Quitman County, MS, Tate County, MS, Tunica County, MS, Lauderdale County, TN, Shelby County, TN, Tipton County, TN
The radar
The Memphis radar (KNQA), 97 km from the middle of the area, began a volume at 22:51 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, 10.8 hours before the alert went out and 80 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
- 305 J/kg
- Mixed-layer CIN
- -139 J/kg
- Mixed-layer LCL
- 1050 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 6:36 AM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 14 more | 114 min |
| Aug 27, 7:47 AM CDT | Tornado Watch | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 19 more | 8 hr |
| Aug 27, 2:41 PM CDT | Mesoscale Discussion | SPC | Chicot, Crittenden, Cross, Desha, Lee, Phillips and 2 more | 94 min |
| Aug 27, 3:47 PM CDT | Tornado Watch | SPC | Arkansas, Clay, Cleburne, Craighead, Crittenden, Cross and 26 more | 8 hr |
| Aug 26, 9:03 PM CDT | Tornado Watch | SPC | Adams, Wilkinson | 11 hr |
| Aug 27, 11:10 AM CDT | Mesoscale Discussion | SPC | Copiah, Jefferson Davis, Lawrence, Marion, Simpson, Walthall | 2 hr |
Nearby
Mesoscale Discussions in Arkansas, 2020Mesoscale Discussions in Mississippi, 2020Mesoscale Discussions in Tennessee, 2020Every mesoscale discussion in 2020
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.