Alert archive / Tennessee / Mesoscale Discussions in 2020
Mesoscale Discussion 1633
The Storm Prediction Center issued this mesoscale discussion at Aug 29, 2020, 3:22 PM CDT for 20 counties in Kentucky; Mississippi County, New Madrid County, Missouri; 43 counties in Tennessee. It was in force for 113 min.
The area
The outline as issued.
The facts
- Issued
- Aug 29, 2020, 3:22 PM CDT (20:22 UTC)
- Expired
- Aug 29, 2020, 5:15 PM CDT
- In force
- 113 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch unlikely
- Chance of a watch
- 20%
All 65 counties
Adair County, KY, Allen County, KY, Barren County, KY, Calloway County, KY, Carlisle County, KY, Christian County, KY, Clinton County, KY, Cumberland County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Logan County, KY, Marshall County, KY, Metcalfe County, KY, Monroe County, KY, Russell County, KY, Simpson County, KY, Todd County, KY, Trigg County, KY, Warren County, KY, Mississippi County, MO, New Madrid County, MO, Bedford County, TN, Benton County, TN, Cannon County, TN, Carroll County, TN, Cheatham County, TN, Clay County, TN, Coffee County, TN, Davidson County, TN, Decatur County, TN, DeKalb County, TN, Dickson County, TN, Dyer County, TN, Gibson County, TN, Grundy County, TN, Henderson County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lake County, TN, Lewis County, TN, Macon County, TN, Marshall County, TN, Maury County, TN, Montgomery County, TN, Obion County, TN, Overton County, TN, Perry County, TN, Pickett County, TN, Putnam County, TN, Robertson County, TN, Rutherford County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, Weakley County, TN, White County, TN, Williamson County, TN, Wilson County, TN
The radar
The Ft Campbell radar (KHPX), 51 km from the middle of the area, began a volume at 20:22 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
Nashville Metro, TN (KBNA), launched 12:00Z, 8.4 hours before the alert went out and 81 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
- 112 J/kg
- Mixed-layer CIN
- -346 J/kg
- Mixed-layer LCL
- 625 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 181 m²/s²
- 0-3 km storm-relative helicity
- 210 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
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 29, 7:53 AM CDT | Mesoscale Discussion | SPC | Barry, Barton, Dade, Jasper, Lawrence, McDonald and 1 more | 97 min |
| Aug 29, 9:46 AM CDT | Mesoscale Discussion | SPC | Barry, Christian, Dade, Douglas, Greene, Lawrence and 8 more | 119 min |
| Aug 29, 11:56 AM CDT | Mesoscale Discussion | SPC | Bollinger, Butler, Cape Girardeau, Carter, Christian, Dent and 25 more | 94 min |
| Aug 29, 3:32 PM CDT | Mesoscale Discussion | SPC | Fayette, Lauderdale, Shelby, Tipton | 88 min |
Nearby
Mesoscale Discussions in Tennessee, 2020Mesoscale Discussions in Kentucky, 2020Mesoscale Discussions in Missouri, 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.