Alert archive / Arkansas / Mesoscale Discussions in 2018
Mesoscale Discussion 37
The Storm Prediction Center issued this mesoscale discussion at Jan 22, 2018, 1:16 AM CST for 4 states. It was in force for 119 min.
The area
The outline as issued.
The facts
- Issued
- Jan 22, 2018, 1:16 AM CST (07:16 UTC)
- Expired
- Jan 22, 2018, 3:15 AM CST
- In force
- 119 min
- Issued by
- the Storm Prediction Center
All 52 counties
Ashley County, AR, Baxter County, AR, Bradley County, AR, Calhoun County, AR, Clark County, AR, Cleburne County, AR, Cleveland County, AR, Columbia County, AR, Conway County, AR, Dallas County, AR, Drew County, AR, Faulkner County, AR, Fulton County, AR, Grant County, AR, Hot Spring County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Jefferson County, AR, Lincoln County, AR, Lonoke County, AR, Nevada County, AR, Ouachita County, AR, Perry County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, Sharp County, AR, Stone County, AR, Union County, AR, Van Buren County, AR, White County, AR, Bienville Parish, LA, Bossier Parish, LA, Caldwell Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, Grant Parish, LA, Jackson Parish, LA, Lincoln Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Red River Parish, LA, Sabine Parish, LA, Union Parish, LA, Vernon Parish, LA, Webster Parish, LA, Winn Parish, LA, Howell County, MO, Oregon County, MO, Shannon County, MO, Sabine County, TX
The radar
The Little Rock radar (KLZK), 21 km from the middle of the area, began a volume at 07:16 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 nearest sounding before it
Shreveport, LA (KBAD), launched 00:00Z, 7.3 hours before the alert went out and 275 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
- 39 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 970 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 221 m²/s²
- 0-3 km storm-relative helicity
- 261 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 |
|---|---|---|---|---|
| Jan 21, 6:25 PM CST | Mesoscale Discussion | SPC | Clark, Crawford, Franklin, Garland, Hempstead, Hot Spring and 15 more | 2 hr |
| Jan 21, 9:35 PM CST | Mesoscale Discussion | SPC | Baxter, Boone, Calhoun, Carroll, Clark, Cleburne and 45 more | 115 min |
| Jan 21, 9:59 PM CST | Tornado Watch | SPC | Baxter, Boone, Bradley, Calhoun, Clark, Cleburne and 37 more | 6 hr |
Nearby
Mesoscale Discussions in Arkansas, 2018Mesoscale Discussions in Louisiana, 2018Mesoscale Discussions in Missouri, 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.