Alert archive / Arkansas / Mesoscale Discussions in 2018
Mesoscale Discussion 604
The Storm Prediction Center issued this mesoscale discussion at May 31, 2018, 11:49 PM CDT for 4 states. It was in force for 116 min.
The area
The outline as issued.
The facts
- Issued
- May 31, 2018, 11:49 PM CDT (04:49 UTC)
- Expired
- Jun 1, 2018, 1:45 AM CDT
- In force
- 116 min
- Issued by
- the Storm Prediction Center
All 41 counties
Baxter County, AR, Boone County, AR, Cleburne County, AR, Craighead County, AR, Cross County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Lawrence County, AR, Marion County, AR, Mississippi County, AR, Newton County, AR, Poinsett County, AR, Searcy County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, Ballard County, KY, Calloway County, KY, Carlisle County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Livingston County, KY, Marshall County, KY, McCracken County, KY, Dunklin County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Crockett County, TN, Dyer County, TN, Gibson County, TN, Haywood County, TN, Henry County, TN, Lake County, TN, Lauderdale County, TN, Obion County, TN, Tipton County, TN, Weakley County, TN
The radar
The Memphis radar (KNQA), 117 km from the middle of the area, began a volume at 04:49 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 (KBYH), launched 00:00Z, 4.8 hours before the alert went out and 161 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
- 1087 J/kg
- Mixed-layer CIN
- -84 J/kg
- Mixed-layer LCL
- 1560 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 150 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 2.4
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 |
|---|---|---|---|---|
| May 31, 7:37 PM CDT | Mesoscale Discussion | SPC | Baxter, Clay, Craighead, Fulton, Greene, Independence and 8 more | 113 min |
| May 31, 7:56 PM CDT | Severe Thunderstorm Watch | SPC | Baxter, Boone, Clay, Cleburne, Conway, Craighead and 23 more | 7 hr |
| Jun 1, 2:41 AM CDT | Mesoscale Discussion | SPC | Bedford, Chester, Coffee, Decatur, Fayette, Franklin and 15 more | 34 min |
Nearby
Mesoscale Discussions in Arkansas, 2018Mesoscale Discussions in Tennessee, 2018Mesoscale Discussions in Kentucky, 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.