Alert archive / Tennessee / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 155, NWS Morristown, TN

August 3, 20226 counties in Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Aug 3, 2022, 8:42 PM EDT for 6 counties in Tennessee. It was in force for 48 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 3, 2022, 8:42 PM EDT (00:42 UTC)
Expired
Aug 3, 2022, 9:30 PM EDT
In force
48 min
Issued by
NWS Morristown, TN
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Anderson County, TN, Blount County, TN, Knox County, TN, Loudon County, TN, Morgan County, TN, Roane County, TN

The radar

The Knoxville radar (KMRX), 82 km from the middle of the area, began a volume at 00:42 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 00:00Z, 0.7 hours before the alert went out and 284 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 00:00Z on 2022-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 933 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 2022-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 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
933 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
1521 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
42 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 Aug 3, 7:31 PM EDT, 1 hour 11 minutes earlier.

Area forecast discussion, Aug 3, 7:31 PM EDT, 1 hour 11 minutes before
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Hazardous weather outlook, Aug 3, 3:34 PM EDT, 5 hours 8 minutes before
Hazardous Weather Outlook
National Weather Service Morristown TN
334 PM EDT Wed Aug 3 2022

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-041930-
Cherokee-Clay-Scott TN-Campbell-Claiborne-Hancock-Hawkins-
Sullivan-Johnson-Morgan-Anderson-Union-Grainger-Hamblen-
Northwest Cocke-Cocke Smoky Mountains-Northwest Greene-
Southeast Greene-Washington TN-Unicoi-Northwest Carter-
Southeast Carter-Roane-Loudon-Knox-Jefferson-Northwest Blount-
Blount Smoky Mountains-North Sevier-Sevier Smoky Mountains-
Sequatchie-Bledsoe-Rhea-Meigs-McMinn-Northwest Monroe-
Southeast Monroe-Marion-Hamilton-Bradley-West Polk-East Polk-Lee-
Wise-Scott VA-Russell-Washington VA-
334 PM EDT Wed Aug 3 2022 /234 PM CDT Wed Aug 3 2022/

This Hazardous Weather Outlook is for portions of southwest North
Carolina...east Tennessee and southwest Virginia.

.DAY ONE...This Afternoon and Tonight

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

A wet pattern will be in place this time period with showers and
thunderstorms possible day or overnight, although activity will
peak during the afternoon and evening hours. Localized flooding
will be possible at times if stronger storms move slowly or train
over the same areas.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not needed at this time.

TD/BW

In the hours before

Special weather statement, Aug 3, 7:30 PM EDT, 1 hour 12 minutes before
Special Weather Statement
National Weather Service Morristown TN
730 PM EDT Wed Aug 3 2022

TNZ067-068-086-040015-
Northwest Monroe TN-Roane TN-Loudon TN-
730 PM EDT Wed Aug 3 2022

...A strong thunderstorm will impact portions of southwestern Loudon,
northwestern Monroe and southeastern Roane Counties through 815 PM
EDT...

At 730 PM EDT, Doppler radar was tracking a strong thunderstorm over
Madisonville, moving north at 15 mph.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Lenoir City, Sweetwater, Loudon, Madisonville, Vonore, Philadelphia,
Paint Rock and Tellico Village.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3545 8443 3546 8445 3546 8444 3558 8450
      3559 8452 3561 8452 3562 8454 3562 8452
      3564 8455 3576 8460 3581 8425 3547 8424
      3543 8444
TIME...MOT...LOC 2330Z 166DEG 14KT 3553 8437

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH
Special weather statement, Aug 3, 7:32 PM EDT, 1 hour 10 minutes before
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Local storm report, Aug 3, 8:00 PM EDT, 42 minutes before
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Local storm report, Aug 3, 8:23 PM EDT, 19 minutes before
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Local storm report, Aug 3, 8:25 PM EDT, 17 minutes before
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Local storm report, Aug 3, 8:32 PM EDT, 10 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 8:12 PM EDTSevere Thunderstorm WarningMRXBlount, Knox, Loudon, Monroe, Morgan, Roane48 min
Aug 3, 8:23 PM EDTSevere Thunderstorm WarningMRXBlount, Knox, Sevier52 min
Aug 3, 8:59 PM EDTSpecial Weather StatementMRXRoane46 min
Aug 3, 9:05 PM EDTSevere Thunderstorm WarningMRXAnderson, Campbell, Knox, Union55 min
Aug 3, 9:09 PM EDTSpecial Weather StatementMRXCocke, Jefferson, Sevier51 min
Aug 3, 9:10 PM EDTAreal Flood AdvisoryMRXBlount, Knox3 hr
Aug 3, 9:40 PM EDTAreal Flood AdvisoryMRXAnderson, Knox3 hr
Aug 3, 9:49 PM EDTSevere Thunderstorm WarningMRXAnderson, Campbell, Claiborne, Morgan, Scott, Union71 min
Aug 3, 9:54 PM EDTSpecial Weather StatementMRXGrainger, Hamblen, Jefferson66 min
Aug 3, 10:41 PM EDTAreal Flood AdvisoryMRXBlount, Grainger, Jefferson, Knox, Sevier3 hr
Aug 3, 10:50 PM EDTSpecial Weather StatementMRXKnox40 min
Aug 3, 10:52 PM EDTSpecial Weather StatementMRXBradley38 min
Aug 4, 12:21 AM EDTAreal Flood AdvisoryMRXAnderson, Campbell, Scott, Union114 min
Aug 4, 5:40 PM EDTSpecial Weather StatementMRXBlount50 min
Aug 4, 5:44 PM EDTSpecial Weather StatementMRXSullivan46 min
Aug 4, 5:50 PM EDTSpecial Weather StatementMRXGreene40 min
Aug 4, 6:00 PM EDTSevere Thunderstorm WarningMRXAnderson, Blount, Knox, Loudon45 min
Aug 4, 6:12 PM EDTSpecial Weather StatementMRXGreene48 min
Aug 4, 6:22 PM EDTSevere Thunderstorm WarningMRXGreene, Hamblen, Hawkins53 min
Aug 4, 6:43 PM EDTSpecial Weather StatementMRXAnderson47 min
Aug 4, 6:53 PM EDTSpecial Weather StatementMRXHawkins52 min
Aug 4, 7:38 PM EDTSpecial Weather StatementMRXUnion52 min
Aug 3, 11:33 PM EDTSpecial Weather StatementMRXWise, City of Norton42 min
Aug 4, 12:19 AM EDTAreal Flood AdvisoryMRXLee, Scott, Wise, City of Norton116 min
Aug 4, 6:36 PM EDTSpecial Weather StatementMRXWashington39 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2022Every severe thunderstorm warning in 2022

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.