Alert archive / Arkansas / Mesoscale Discussions in 2020
Mesoscale Discussion 249
The Storm Prediction Center issued this mesoscale discussion at Mar 28, 2020, 12:14 PM CDT for 48 counties in Arkansas; Bossier Parish, Claiborne Parish, Webster Parish, Louisiana; Bowie County, Cass County, Marion County, Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 28, 2020, 12:14 PM CDT (17:14 UTC)
- Expired
- Mar 28, 2020, 2:15 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
All 54 counties
Arkansas County, AR, Bradley County, AR, Calhoun County, AR, Clark County, AR, Cleburne County, AR, Cleveland County, AR, Columbia County, AR, Conway County, AR, Cross County, AR, Dallas County, AR, Drew County, AR, Faulkner County, AR, Garland County, AR, Grant County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Jefferson County, AR, Johnson County, AR, Lafayette County, AR, Lawrence County, AR, Lincoln County, AR, Little River County, AR, Logan County, AR, Lonoke County, AR, Miller County, AR, Monroe County, AR, Montgomery County, AR, Nevada County, AR, Ouachita County, AR, Perry County, AR, Pike County, AR, Poinsett County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, Searcy County, AR, Sevier County, AR, Stone County, AR, Union County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Yell County, AR, Bossier Parish, LA, Claiborne Parish, LA, Webster Parish, LA, Bowie County, TX, Cass County, TX, Marion County, TX
The radar
The Little Rock radar (KLZK), 111 km from the middle of the area, began a volume at 17:16 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 12:00Z, 5.2 hours before the alert went out and 294 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
- 172 J/kg
- Mixed-layer CIN
- -331 J/kg
- Mixed-layer LCL
- 810 m above ground
- 0-6 km bulk shear
- 74 kt
- 0-1 km storm-relative helicity
- 177 m²/s²
- 0-3 km storm-relative helicity
- 162 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Mar 28, 1:17 PM CDT | Mesoscale Discussion | SPC | Clay, Randolph | 88 min |
| Mar 28, 2:10 PM CDT | Tornado Watch | SPC | Arkansas, Baxter, Bradley, Calhoun, Clark, Clay and 42 more | 5 hr |
| Mar 28, 2:56 PM CDT | Mesoscale Discussion | SPC | Arkansas, Bradley, Calhoun, Clay, Cleburne, Cleveland and 34 more | 94 min |
| Mar 28, 4:59 PM CDT | Mesoscale Discussion | SPC | Crittenden, Lee, Mississippi, Phillips, St. Francis | 61 min |
| Mar 28, 6:34 PM CDT | Tornado Watch | SPC | Ashley, Chicot, Crittenden, Cross, Lee, Mississippi and 2 more | 7 hr |
| Mar 28, 3:42 AM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Wichita, Wilbarger | 2 hr |
| Mar 28, 7:40 AM CDT | Mesoscale Discussion | SPC | Bastrop, Bell, Blanco, Bosque, Burnet, Coryell and 15 more | 2 hr |
Nearby
Mesoscale Discussions in Arkansas, 2020Mesoscale Discussions in Louisiana, 2020Mesoscale Discussions in Texas, 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.