Alert archive / Alabama / Mesoscale Discussions in 2017
Mesoscale Discussion 1608
The Storm Prediction Center issued this mesoscale discussion at Aug 31, 2017, 5:47 PM CDT for 22 counties in Alabama; 22 counties in Mississippi; 7 counties in Tennessee. It was in force for 88 min.
The area
The outline as issued.
The facts
- Issued
- Aug 31, 2017, 5:47 PM CDT (22:47 UTC)
- Expired
- Aug 31, 2017, 7:15 PM CDT
- In force
- 88 min
- Issued by
- the Storm Prediction Center
All 51 counties
Bibb County, AL, Chilton County, AL, Colbert County, AL, Cullman County, AL, Fayette County, AL, Franklin County, AL, Greene County, AL, Hale County, AL, Jefferson County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Marengo County, AL, Marion County, AL, Perry County, AL, Pickens County, AL, Shelby County, AL, Sumter County, AL, Talladega County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL, Alcorn County, MS, Benton County, MS, Calhoun County, MS, Chickasaw County, MS, Clay County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Lowndes County, MS, Marshall County, MS, Monroe County, MS, Noxubee County, MS, Oktibbeha County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Webster County, MS, Yalobusha County, MS, Chester County, TN, Fayette County, TN, Hardeman County, TN, Hardin County, TN, Henderson County, TN, Madison County, TN, McNairy County, TN
The radar
The Columbus AFB radar (KGWX), 36 km from the middle of the area, began a volume at 22:46 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, 10.8 hours before the alert went out and 146 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
- 20 J/kg
- Mixed-layer CIN
- -77 J/kg
- Mixed-layer LCL
- 525 m above ground
- 0-6 km bulk shear
- 2 kt
- 0-1 km storm-relative helicity
- -15 m²/s²
- 0-3 km storm-relative helicity
- 26 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 |
|---|---|---|---|---|
| Aug 31, 10:31 AM CDT | Mesoscale Discussion | SPC | Choctaw, Fayette, Greene, Hale, Lamar, Marion and 5 more | 119 min |
| Aug 31, 11:13 AM CDT | Tornado Watch | SPC | Bibb, Blount, Chilton, Colbert, Coosa, Cullman and 22 more | 11 hr |
| Aug 31, 2:35 PM CDT | Mesoscale Discussion | SPC | Colbert, Fayette, Franklin, Greene, Lamar, Marion and 3 more | 115 min |
Nearby
Mesoscale Discussions in Alabama, 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.