Alert archive / Arkansas / Mesoscale Discussions in 2020
Mesoscale Discussion 370
The Storm Prediction Center issued this mesoscale discussion at Apr 12, 2020, 7:56 PM CDT for 6 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 12, 2020, 7:56 PM CDT (00:56 UTC)
- Expired
- Apr 12, 2020, 10:00 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 94 counties
Arkansas County, AR, Ashley County, AR, Baxter County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Clay County, AR, Cleburne County, AR, Cleveland County, AR, Columbia County, AR, Conway County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Faulkner County, AR, Fulton County, AR, Grant County, AR, Greene County, AR, Hot Spring County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Jefferson County, AR, Lafayette County, AR, Lawrence County, AR, Lee County, AR, Lincoln County, AR, Lonoke County, AR, Marion County, AR, Miller County, AR, Mississippi County, AR, Monroe County, AR, Nevada County, AR, Ouachita County, AR, Perry County, AR, Phillips County, AR, Poinsett County, AR, Prairie County, AR, Pulaski County, AR, Randolph County, AR, Saline County, AR, Searcy County, AR, Sharp County, AR, St. Francis County, AR, Stone County, AR, Union County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, East Carroll Parish, LA, Lincoln Parish, LA, Morehouse Parish, LA, Union Parish, LA, Webster Parish, LA, West Carroll Parish, LA, Dunklin County, MO, Oregon County, MO, Ripley County, MO, Bolivar County, MS, Carroll County, MS, Coahoma County, MS, DeSoto County, MS, Grenada County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Lafayette County, MS, Leflore County, MS, Marshall County, MS, Panola County, MS, Quitman County, MS, Sharkey County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tunica County, MS, Washington County, MS, Yalobusha County, MS, Fayette County, TN, Lauderdale County, TN, Shelby County, TN, Tipton County, TN, Cass County, TX, Harrison County, TX, Marion County, TX, Panola County, TX
The radar
The Little Rock radar (KLZK), 64 km from the middle of the area, began a volume at 01:00 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 (KLZK), launched 00:00Z, 0.9 hours before the alert went out and 205 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1099 m above ground
- 0-6 km bulk shear
- 91 kt
- 0-1 km storm-relative helicity
- 109 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
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 |
|---|---|---|---|---|
| Apr 12, 8:19 PM CDT | Severe Thunderstorm Watch | SPC | Clay, Craighead, Crittenden, Cross, Greene, Lee and 4 more | 4 hr |
| Apr 12, 9:44 PM CDT | Mesoscale Discussion | SPC | Chicot, Crittenden, Cross, Desha, Lee, Mississippi and 5 more | 91 min |
| Apr 12, 7:36 PM CDT | Mesoscale Discussion | SPC | Clarke, George, Greene, Perry, Wayne | 84 min |
| Apr 12, 10:28 PM CDT | Mesoscale Discussion | SPC | George | 92 min |
| Apr 12, 11:19 PM CDT | Mesoscale Discussion | SPC | Alcorn, Itawamba, Lee, Prentiss, Tippah, Tishomingo and 1 more | 86 min |
| Apr 12, 7:41 PM CDT | Mesoscale Discussion | SPC | Polk | 64 min |
| Apr 12, 7:57 PM CDT | Tornado Watch | SPC | Blount, Bradley, McMinn, Monroe, Polk | 6 hr |
| Apr 12, 10:17 PM CDT | Mesoscale Discussion | SPC | Blount, Bradley, Cocke, Loudon, McMinn, Meigs and 3 more | 88 min |
Nearby
Mesoscale Discussions in Arkansas, 2020Mesoscale Discussions in Mississippi, 2020Mesoscale Discussions in Louisiana, 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.