Alert archive / Tennessee / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 156, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Aug 10, 2020, 5:38 PM CDT for 4 counties in Tennessee. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 10, 2020, 5:38 PM CDT (22:38 UTC)
- Expired
- Aug 10, 2020, 6:23 PM CDT
- In force
- 45 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Bledsoe County, TN, Hamilton County, TN, Rhea County, TN, Sequatchie County, TN
The radar
The Northeast Alabama radar (KHTX), 100 km from the middle of the area, began a volume at 22:38 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, 10.6 hours before the alert went out and 150 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
- 778 J/kg
- Mixed-layer CIN
- -76 J/kg
- Mixed-layer LCL
- 1335 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 69 m²/s²
- 0-3 km storm-relative helicity
- 84 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Morristown, TN wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 9, 6:22 PM CDT, 23 hours 16 minutes earlier.
Area forecast discussion, Aug 9, 6:22 PM CDT, 23 hours 16 minutes before
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</html>The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 9:40 AM CDT | Special Weather Statement | MRX | Anderson, Knox | 50 min |
| Aug 10, 10:56 AM CDT | Special Weather Statement | MRX | Blount | 19 min |
| Aug 10, 2:08 PM CDT | Special Weather Statement | MRX | Hancock | 37 min |
| Aug 10, 2:27 PM CDT | Special Weather Statement | MRX | Claiborne | 48 min |
| Aug 10, 2:40 PM CDT | Special Weather Statement | MRX | Grainger | 50 min |
| Aug 10, 3:14 PM CDT | Special Weather Statement | MRX | Cocke, Hamblen, Jefferson | 46 min |
| Aug 10, 4:21 PM CDT | Special Weather Statement | MRX | Morgan | 54 min |
| Aug 10, 5:10 PM CDT | Areal Flood Advisory | MRX | Morgan | 3 hr |
| Aug 10, 5:13 PM CDT | Special Weather Statement | MRX | Bledsoe, Sequatchie | 62 min |
| Aug 10, 6:17 PM CDT | Special Weather Statement | MRX | Bradley, Hamilton, Marion | 43 min |
Nearby
Severe Thunderstorm Warnings in Tennessee, 2020Every severe thunderstorm warning 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.