Alert archive / Tennessee / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 178, NWS Morristown, TN

September 20, 2026Bledsoe County, Sequatchie County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Sep 20, 2026, 5:05 PM CDT for Bledsoe County, Sequatchie County, Tennessee. It was in force for 40 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
Sep 20, 2026, 5:05 PM CDT (22:05 UTC)
Expired
Sep 20, 2026, 5:45 PM CDT
In force
40 min
Issued by
NWS Morristown, TN
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Bledsoe County, TN, Sequatchie County, TN

The radar

The Northeast Alabama radar (KHTX), 94 km from the middle of the area, began a volume at 22:09 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 10.1 hours before the alert went out and 246 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.

Skew-T log-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 12:00Z on 2026-09-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 169 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 12:00Z on 2026-09-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 15 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
169 J/kg
Mixed-layer CIN
-136 J/kg
Mixed-layer LCL
809 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
46 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Morristown, TN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 20, 3:48 PM CDTSpecial Weather StatementMRXCampbell42 min
Sep 20, 4:29 PM CDTSpecial Weather StatementMRXAnderson46 min
Sep 20, 4:30 PM CDTSpecial Weather StatementMRXUnion45 min
Sep 20, 4:37 PM CDTSevere Thunderstorm WarningMRXCampbell, Claiborne, Union38 min
Sep 20, 4:41 PM CDTSpecial Weather StatementMRXKnox49 min
Sep 20, 4:47 PM CDTSpecial Weather StatementMRXSequatchie43 min
Sep 20, 5:26 PM CDTSpecial Weather StatementMRXKnox49 min
Sep 20, 5:41 PM CDTSevere Thunderstorm WarningMRXHamilton, Marion, Sequatchie49 min
Sep 20, 5:46 PM CDTSpecial Weather StatementMRXMorgan44 min
Sep 20, 6:29 PM CDTSpecial Weather StatementMRXHamilton46 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2026Every severe thunderstorm warning in 2026

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.