Alert archive / Tennessee / Mesoscale Discussions in 2020
Mesoscale Discussion 140
The Storm Prediction Center issued this mesoscale discussion at Mar 3, 2020, 2:34 AM CST for 4 states. It was in force for 116 min.
The area
The outline as issued.
The facts
- Issued
- Mar 3, 2020, 2:34 AM CST (08:34 UTC)
- Expired
- Mar 3, 2020, 4:30 AM CST
- In force
- 116 min
- Issued by
- the Storm Prediction Center
All 42 counties
Lauderdale County, AL, Crittenden County, AR, Lee County, AR, Monroe County, AR, Phillips County, AR, St. Francis County, AR, Alcorn County, MS, Benton County, MS, DeSoto County, MS, Marshall County, MS, Prentiss County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Benton County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Crockett County, TN, Davidson County, TN, Decatur County, TN, Dickson County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Lawrence County, TN, Lewis County, TN, Madison County, TN, Maury County, TN, McNairy County, TN, Perry County, TN, Shelby County, TN, Tipton County, TN, Wayne County, TN, Williamson County, TN
The radar
The Memphis radar (KNQA), 94 km from the middle of the area, began a volume at 08:36 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 (KLZK), launched 00:00Z, 8.6 hours before the alert went out and 115 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
- 634 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 1095 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 261 m²/s²
- 0-3 km storm-relative helicity
- 361 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 5.9
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 |
|---|---|---|---|---|
| Mar 3, 2:52 AM CST | Mesoscale Discussion | SPC | Colbert, Fayette, Franklin, Greene, Lamar, Marion and 2 more | 2 hr |
| Mar 3, 5:12 AM CST | Tornado Watch | SPC | Autauga, Bibb, Bullock, Chambers, Chilton, Clay and 15 more | 5 hr |
| Mar 3, 7:25 AM CST | Mesoscale Discussion | SPC | Autauga, Bibb, Bullock, Chambers, Chilton, Clay and 8 more | 2 hr |
| Mar 3, 9:16 AM CST | Mesoscale Discussion | SPC | Barbour, Bullock, Russell | 89 min |
| Mar 3, 12:52 PM CST | Mesoscale Discussion | SPC | Autauga, Barbour, Bullock, Chambers, Chilton, Dallas and 12 more | 2 hr |
| Mar 2, 11:10 PM CST | Mesoscale Discussion | SPC | Crittenden, Cross, Lee, Mississippi, Poinsett, St. Francis | 2 hr |
| Mar 3, 12:59 AM CST | Severe Thunderstorm Watch | SPC | Craighead, Crittenden, Cross, Lee, Mississippi, Poinsett and 1 more | 4 hr |
| Mar 2, 11:22 PM CST | Tornado Watch | SPC | Cannon, Cheatham, Clay, Cumberland, Davidson, DeKalb and 20 more | 7 hr |
| Mar 3, 1:02 AM CST | Mesoscale Discussion | SPC | Clay, Davidson, DeKalb, Fentress, Jackson, Macon and 7 more | 118 min |
Nearby
Mesoscale Discussions in Tennessee, 2020Mesoscale Discussions in Mississippi, 2020Mesoscale Discussions in Arkansas, 2020Every mesoscale discussion in 2020
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.