Alert archive / Tennessee / Mesoscale Discussions in 2018
Mesoscale Discussion 1605
The Storm Prediction Center issued this mesoscale discussion at Oct 31, 2018, 7:04 PM CDT for Calloway County, Kentucky; Benton County, Marshall County, Mississippi; 25 counties in Tennessee. It was in force for 116 min.
The area
The outline as issued.
The facts
- Issued
- Oct 31, 2018, 7:04 PM CDT (00:04 UTC)
- Expired
- Oct 31, 2018, 9:00 PM CDT
- In force
- 116 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 28 counties
Calloway County, KY, Benton County, MS, Marshall County, MS, Benton County, TN, Carroll County, TN, Chester County, TN, Crockett County, TN, Decatur County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Lauderdale County, TN, Madison County, TN, McNairy County, TN, Obion County, TN, Perry County, TN, Shelby County, TN, Stewart County, TN, Tipton County, TN, Weakley County, TN
The radar
The Memphis radar (KNQA), 104 km from the middle of the area, began a volume at 00:04 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, 0.1 hours before the alert went out and 139 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
- 381 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 535 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 220 m²/s²
- 0-3 km storm-relative helicity
- 262 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.8
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 |
|---|---|---|---|---|
| Oct 31, 8:14 PM CDT | Tornado Watch | SPC | Adams, Wilkinson | 8 hr |
| Oct 31, 10:01 PM CDT | Mesoscale Discussion | SPC | Adams, Amite, Attala, Calhoun, Carroll, Claiborne and 32 more | 89 min |
| Oct 31, 11:07 PM CDT | Tornado Watch | SPC | Amite, Attala, Bolivar, Calhoun, Carroll, Choctaw and 58 more | 9 hr |
| Nov 1, 1:19 AM CDT | Mesoscale Discussion | SPC | Adams, Amite, Attala, Bolivar, Carroll, Claiborne and 31 more | 116 min |
| Nov 1, 1:41 AM CDT | Mesoscale Discussion | SPC | Alcorn, Benton, DeSoto, Marshall, Prentiss, Tate and 3 more | 3 hr |
| Nov 1, 4:30 AM CDT | Mesoscale Discussion | SPC | Attala, Calhoun, Chickasaw, Choctaw, Clarke, Clay and 33 more | 2 hr |
Nearby
Mesoscale Discussions in Tennessee, 2018Mesoscale Discussions in Mississippi, 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.