Alert archive / Arkansas / Mesoscale Discussions in 2018
Mesoscale Discussion 114
The Storm Prediction Center issued this mesoscale discussion at Mar 10, 2018, 8:06 PM CST for 33 counties in Arkansas; 18 counties in Mississippi; 8 counties in Oklahoma. It was in force for 114 min.
The area
The outline as issued.
The facts
- Issued
- Mar 10, 2018, 8:06 PM CST (02:06 UTC)
- Expired
- Mar 10, 2018, 10:00 PM CST
- In force
- 114 min
- Issued by
- the Storm Prediction Center
All 59 counties
Arkansas County, AR, Chicot County, AR, Clark County, AR, Cleveland County, AR, Conway County, AR, Crawford County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Faulkner County, AR, Franklin County, AR, Garland County, AR, Grant County, AR, Hot Spring County, AR, Jefferson County, AR, Johnson County, AR, Lincoln County, AR, Logan County, AR, Lonoke County, AR, Monroe County, AR, Montgomery County, AR, Perry County, AR, Phillips County, AR, Pike County, AR, Polk County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, Scott County, AR, Sebastian County, AR, Washington County, AR, Yell County, AR, Attala County, MS, Bolivar County, MS, Calhoun County, MS, Carroll County, MS, Choctaw County, MS, Coahoma County, MS, Grenada County, MS, Holmes County, MS, Humphreys County, MS, Leake County, MS, Leflore County, MS, Montgomery County, MS, Quitman County, MS, Sunflower County, MS, Tallahatchie County, MS, Washington County, MS, Webster County, MS, Yalobusha County, MS, Adair County, OK, Cherokee County, OK, Haskell County, OK, LeFlore County, OK, McIntosh County, OK, Muskogee County, OK, Sequoyah County, OK, Wagoner County, OK
The radar
The Little Rock radar (KLZK), 63 km from the middle of the area, began a volume at 02:09 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
Shreveport, LA (KBAD), launched 00:00Z, 2.1 hours before the alert went out and 251 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
- 1026 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 1265 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 236 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 4.3
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 10, 8:33 PM CST | Severe Thunderstorm Watch | SPC | Ashley, Chicot | 7 hr |
| Mar 10, 10:08 PM CST | Mesoscale Discussion | SPC | Lafayette, Miller | 2 hr |
| Mar 10, 10:44 PM CST | Mesoscale Discussion | SPC | Arkansas, Ashley, Chicot, Desha, Drew, Lincoln | 91 min |
Nearby
Mesoscale Discussions in Arkansas, 2018Mesoscale Discussions in Mississippi, 2018Mesoscale Discussions in Oklahoma, 2018Every mesoscale discussion in 2018
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.