Alert archive / Virginia / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 138, NWS Morristown, TN

July 1, 2023Carter County, Johnson County, Sullivan County, Tennessee; 4 counties in Virginia

NWS Morristown, TN issued this severe thunderstorm warning at Jul 1, 2023, 6:27 AM EDT for Carter County, Johnson County, Sullivan County, Tennessee; 4 counties in Virginia. It was in force for 78 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
Jul 1, 2023, 6:27 AM EDT (10:27 UTC)
Expired
Jul 1, 2023, 7:45 AM EDT
In force
78 min
Issued by
NWS Morristown, TN
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

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

The radar

The Knoxville radar (KMRX), 121 km from the middle of the area, began a volume at 10:29 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 00:00Z, 10.5 hours before the alert went out and 345 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, Cncnati-Daytn, OH at 00:00Z on 2023-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1361 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, Cncnati-Daytn, OH at 00:00Z on 2023-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 square meters per square second.193958Sfc1 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
1361 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
1290 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
118 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.3

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 Jul 1, 3:13 AM EDT, 3 hours 14 minutes earlier.

Area forecast discussion, Jul 1, 3:13 AM EDT, 3 hours 14 minutes before
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Hazardous weather outlook, Jul 1, 3:40 AM EDT, 2 hours 47 minutes before
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In the hours before

Special weather statement, Jul 1, 5:29 AM EDT, 58 minutes before
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<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 30, 9:44 PM EDTSpecial Weather StatementMRXSequatchie31 min
Jun 30, 10:10 PM EDTSpecial Weather StatementMRXMarion35 min
Jun 30, 10:33 PM EDTRiver Flood AdvisoryMRXMorgan, Roane18 hr
Jun 30, 11:04 PM EDTSpecial Weather StatementMRXMarion26 min
Jul 1, 3:40 PM EDTSpecial Weather StatementMRXMarion50 min
Jul 1, 4:00 PM EDTSpecial Weather StatementMRXSequatchie45 min
Jul 1, 4:06 PM EDTSevere Thunderstorm WarningMRXBledsoe, Hamilton, Sequatchie39 min
Jul 1, 4:16 PM EDTSpecial Weather StatementMRXSullivan44 min
Jul 1, 4:22 PM EDTSpecial Weather StatementMRXHamilton38 min
Jul 1, 4:31 PM EDTSevere Thunderstorm WarningMRXHamilton, Marion, Sequatchie44 min
Jul 1, 4:52 PM EDTSpecial Weather StatementMRXBradley38 min
Jul 1, 5:22 PM EDTSpecial Weather StatementMRXAnderson, Loudon, McMinn, Roane38 min
Jul 1, 5:34 PM EDTSpecial Weather StatementMRXMcMinn, Polk41 min
Jul 1, 6:01 PM EDTSpecial Weather StatementMRXAnderson, Blount, Knox, Loudon, Monroe, Union44 min
Jul 1, 6:21 PM EDTSpecial Weather StatementMRXSevier39 min
Jul 1, 6:49 PM EDTSpecial Weather StatementMRXCocke41 min
Jul 1, 5:29 AM EDTSpecial Weather StatementMRXWise, City of Norton46 min
Jul 1, 5:45 AM EDTSevere Thunderstorm WarningMRXRussell, Scott, Washington, Wise, City of Norton45 min
Jul 1, 3:42 PM EDTSpecial Weather StatementMRXScott48 min
Jul 1, 4:50 PM EDTSpecial Weather StatementMRXCity of Bristol40 min
Jul 1, 6:16 PM EDTSpecial Weather StatementMRXCherokee, Clay59 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2023Severe Thunderstorm Warnings in Tennessee, 2023Every 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.