Alert archive / Tennessee / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 68, NWS Morristown, TN

April 30, 2025Carter County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Apr 30, 2025, 5:46 PM EDT for Carter County, Tennessee. It was in force for 44 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: Apr 30, 2025, 5:46 PM EDT (21:46 UTC)
Expired: Apr 30, 2025, 6:30 PM EDT
In force: 44 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Carter County, TN

The radar

The Knoxville radar (KMRX), 115 km from the middle of the area, began a volume at 21:48 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 9.8 hours before the alert went out and 378 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 885 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 121 m²/s²
0-3 km storm-relative helicity: 159 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Apr 30, 2:31 PM EDT, 3 hours 15 minutes earlier.

Area forecast discussion, Apr 30, 2:31 PM EDT, 3 hours 15 minutes before

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Hazardous weather outlook, Apr 30, 2:31 PM EDT, 3 hours 15 minutes before

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In the hours before

Special weather statement, Apr 30, 2:09 PM EDT, 3 hours 37 minutes before

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Special weather statement, Apr 30, 2:12 PM EDT, 3 hours 34 minutes before

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Special weather statement, Apr 30, 5:04 PM EDT, 42 minutes before

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Special weather statement, Apr 30, 5:12 PM EDT, 34 minutes before

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Special weather statement, Apr 30, 5:21 PM EDT, 25 minutes before

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Special weather statement, Apr 30, 5:38 PM EDT, 8 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 1:48 PM EDT	Special Weather Statement	MRX	Morgan	27 min
Apr 30, 1:52 PM EDT	Severe Thunderstorm Warning	MRX	Morgan, Scott	38 min
Apr 30, 2:09 PM EDT	Special Weather Statement	MRX	Campbell	36 min
Apr 30, 2:12 PM EDT	Special Weather Statement	MRX	Scott	48 min
Apr 30, 4:55 PM EDT	Severe Thunderstorm Warning	MRX	Unicoi	50 min
Apr 30, 4:57 PM EDT	Severe Thunderstorm Warning	MRX	Hancock, Hawkins	48 min
Apr 30, 5:04 PM EDT	Special Weather Statement	MRX	Sevier	41 min
Apr 30, 5:21 PM EDT	Special Weather Statement	MRX	Carter	39 min
Apr 30, 5:38 PM EDT	Special Weather Statement	MRX	Cocke	52 min
Apr 30, 5:57 PM EDT	Special Weather Statement	MRX	Cocke	48 min
Apr 30, 6:22 PM EDT	Special Weather Statement	MRX	Greene	38 min
Apr 30, 6:31 PM EDT	Special Weather Statement	MRX	Carter	44 min
Apr 30, 6:53 PM EDT	Flash Flood Warning	MRX	Cocke	112 min
Apr 30, 6:56 PM EDT	Special Weather Statement	MRX	Greene	49 min
Apr 30, 5:12 PM EDT	Special Weather Statement	MRX	Russell, Washington	48 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2025 Every severe thunderstorm warning in 2025

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.