Alert archive / Tennessee / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 45, NWS Morristown, TN

March 25, 2023Carter County, Johnson County, Sullivan County, Tennessee; Washington County, City of Bristol, Virginia

NWS Morristown, TN issued this severe thunderstorm warning at Mar 25, 2023, 5:15 AM EDT for Carter County, Johnson County, Sullivan County, Tennessee; Washington County, City of Bristol, Virginia. It was in force for 43 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: Mar 25, 2023, 5:15 AM EDT (09:15 UTC)
Expired: Mar 25, 2023, 5:58 AM EDT
In force: 43 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Carter County, TN, Johnson County, TN, Sullivan County, TN, City of Bristol, VA, Washington County, VA

The radar

The Knoxville radar (KMRX), 124 km from the middle of the area, began a volume at 09:18 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

Roanoke, VA (KRNK), launched 00:00Z, 9.3 hours before the alert went out and 242 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: 1185 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 399 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

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 Mar 25, 3:21 AM EDT, 1 hour 54 minutes earlier.

Area forecast discussion, Mar 25, 3:21 AM EDT, 1 hour 54 minutes before

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Hazardous weather outlook, Mar 25, 3:23 AM EDT, 1 hour 52 minutes before

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In the hours before

Local storm report, Mar 25, 4:45 AM EDT, 30 minutes before

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Special weather statement, Mar 25, 4:47 AM EDT, 28 minutes before

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Local storm report, Mar 25, 4:48 AM EDT, 27 minutes before

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Local storm report, Mar 25, 4:51 AM EDT, 24 minutes before

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Local storm report, Mar 25, 5:00 AM EDT, 15 minutes before

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Local storm report, Mar 25, 5:06 AM EDT, 9 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
Mar 25, 1:50 AM EDT	Severe Thunderstorm Warning	MRX	Marion, Sequatchie	55 min
Mar 25, 1:57 AM EDT	Special Weather Statement	MRX	Morgan, Scott	63 min
Mar 25, 2:01 AM EDT	Severe Thunderstorm Warning	MRX	Bledsoe, Marion, Rhea, Sequatchie	44 min
Mar 25, 2:11 AM EDT	Tornado Warning	MRX	Bledsoe, Rhea, Roane	27 min
Mar 25, 2:32 AM EDT	Special Weather Statement	MRX	Campbell	43 min
Mar 25, 2:32 AM EDT	Severe Thunderstorm Warning	MRX	Bledsoe, Hamilton, Marion, Sequatchie	31 min
Mar 25, 2:35 AM EDT	Severe Thunderstorm Warning	MRX	Bledsoe, Hamilton, Loudon, McMinn, Meigs, Monroe and 3 more	55 min
Mar 25, 2:45 AM EDT	Severe Thunderstorm Warning	MRX	Anderson, Campbell, Morgan, Roane, Scott	45 min
Mar 25, 2:52 AM EDT	Severe Thunderstorm Warning	MRX	Bradley, Hamilton, McMinn, Meigs, Polk	38 min
Mar 25, 3:03 AM EDT	Severe Thunderstorm Warning	MRX	Anderson, Blount, Knox, Loudon, McMinn, Monroe and 1 more	42 min
Mar 25, 3:16 AM EDT	Severe Thunderstorm Warning	MRX	Bradley, McMinn, Monroe, Polk	59 min
Mar 25, 3:28 AM EDT	Special Weather Statement	MRX	Grainger, Union	47 min
Mar 25, 3:41 AM EDT	Severe Thunderstorm Warning	MRX	Blount, Cocke, Grainger, Greene, Hamblen, Jefferson and 5 more	64 min
Mar 25, 3:43 AM EDT	Severe Thunderstorm Warning	MRX	Blount, Monroe	62 min
Mar 25, 3:59 AM EDT	Severe Thunderstorm Warning	MRX	Grainger, Greene, Hamblen, Hancock, Hawkins	46 min
Mar 25, 4:21 AM EDT	Severe Thunderstorm Warning	MRX	Cocke, Greene, Sevier	39 min
Mar 25, 4:40 AM EDT	Severe Thunderstorm Warning	MRX	Carter, Greene, Hawkins, Sullivan, Unicoi, Washington	50 min
Mar 25, 5:49 AM EDT	Wind Advisory	MRX	Anderson, Blount, Campbell, Carter, Claiborne, Cocke and 17 more	14 hr
Mar 25, 4:47 AM EDT	Special Weather Statement	MRX	Russell, Scott, Washington, City of Bristol	58 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2023 Severe Thunderstorm Warnings in Virginia, 2023 Every severe thunderstorm warning in 2023

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.