Alert archive / Arkansas / Mesoscale Discussions in 2017
Mesoscale Discussion 1140
The Storm Prediction Center issued this mesoscale discussion at Jun 23, 2017, 4:35 PM CDT for 4 states. It was in force for 85 min.
The area
The outline as issued.
The facts
- Issued
- Jun 23, 2017, 4:35 PM CDT (21:35 UTC)
- Expired
- Jun 23, 2017, 6:00 PM CDT
- In force
- 85 min
- Issued by
- the Storm Prediction Center
All 38 counties
Arkansas County, AR, Conway County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Faulkner County, AR, Garland County, AR, Grant County, AR, Greene County, AR, Hot Spring County, AR, Jackson County, AR, Jefferson County, AR, Lee County, AR, Lonoke County, AR, Mississippi County, AR, Monroe County, AR, Perry County, AR, Phillips County, AR, Poinsett County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, St. Francis County, AR, White County, AR, Woodruff County, AR, Yell County, AR, Dunklin County, MO, Pemiscot County, MO, Coahoma County, MS, DeSoto County, MS, Panola County, MS, Quitman County, MS, Tate County, MS, Tunica County, MS, Dyer County, TN, Lauderdale County, TN, Shelby County, TN, Tipton County, TN
The radar
The Little Rock radar (KLZK), 68 km from the middle of the area, began a volume at 21:36 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 12:00Z, 9.6 hours before the alert went out and 160 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
- 1156 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 490 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 50 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 |
|---|---|---|---|---|
| Jun 22, 8:57 PM CDT | Mesoscale Discussion | SPC | Chicot | 63 min |
| Jun 23, 12:22 PM CDT | Mesoscale Discussion | SPC | Baxter, Benton, Boone, Carroll, Clark, Cleburne and 37 more | 2 hr |
| Jun 23, 2:04 PM CDT | Severe Thunderstorm Watch | SPC | Arkansas, Baxter, Boone, Bradley, Calhoun, Clark and 51 more | 6 hr |
| Jun 23, 3:32 PM CDT | Mesoscale Discussion | SPC | Crawford, Sebastian | 118 min |
| Jun 23, 10:54 AM CDT | Mesoscale Discussion | SPC | Chickasaw, Choctaw, Clay, Itawamba, Kemper, Leake and 9 more | 96 min |
| Jun 23, 12:16 PM CDT | Tornado Watch | SPC | Lowndes, Noxubee, Oktibbeha, Winston | 6 hr |
| Jun 23, 3:17 PM CDT | Mesoscale Discussion | SPC | Lauderdale | 118 min |
Nearby
Mesoscale Discussions in Arkansas, 2017Mesoscale Discussions in Mississippi, 2017Mesoscale Discussions in Tennessee, 2017Every mesoscale discussion in 2017
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.