Alert archive / Arkansas / Mesoscale Discussions in 2017
Mesoscale Discussion 1127
The Storm Prediction Center issued this mesoscale discussion at Jun 22, 2017, 6:59 PM CDT for 23 counties in Arkansas; 17 counties in Mississippi; 5 counties in Tennessee. It was in force for 61 min.
The area
The outline as issued.
The facts
- Issued
- Jun 22, 2017, 6:59 PM CDT (23:59 UTC)
- Expired
- Jun 22, 2017, 8:00 PM CDT
- In force
- 61 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 45 counties
Arkansas County, AR, Bradley County, AR, Cleveland County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Desha County, AR, Drew County, AR, Grant County, AR, Jackson County, AR, Jefferson County, AR, Lee County, AR, Lincoln County, AR, Lonoke County, AR, Mississippi County, AR, Monroe County, AR, Phillips County, AR, Poinsett County, AR, Prairie County, AR, Pulaski County, AR, St. Francis County, AR, White County, AR, Woodruff County, AR, Benton County, MS, Bolivar County, MS, Calhoun County, MS, Coahoma County, MS, DeSoto County, MS, Grenada County, MS, Lafayette County, MS, Marshall County, MS, Panola County, MS, Pontotoc County, MS, Quitman County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tunica County, MS, Union County, MS, Yalobusha County, MS, Fayette County, TN, Haywood County, TN, Lauderdale County, TN, Shelby County, TN, Tipton County, TN
The radar
The Memphis radar (KNQA), 102 km from the middle of the area, began a volume at 00:02 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, 12.0 hours before the alert went out and 61 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
- 163 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 546 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 105 m²/s²
- 0-3 km storm-relative helicity
- 110 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, 11:50 AM CDT | Mesoscale Discussion | SPC | Ashley, Bradley, Chicot | 85 min |
| Jun 22, 1:04 PM CDT | Tornado Watch | SPC | Ashley, Chicot | 9 hr |
| Jun 22, 3:48 PM CDT | Mesoscale Discussion | SPC | Chicot | 87 min |
| Jun 21, 9:56 PM CDT | Mesoscale Discussion | SPC | Forrest, George, Greene, Hancock, Harrison, Jackson and 6 more | 2 hr |
| Jun 22, 2:24 AM CDT | Mesoscale Discussion | SPC | Clarke, Covington, Forrest, George, Greene, Hancock and 14 more | 96 min |
| Jun 22, 2:57 AM CDT | Tornado Watch | SPC | Adams, Amite, Claiborne, Clarke, Copiah, Covington and 37 more | 10 hr |
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.