Alert archive / Tennessee / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 220, NWS Nashville, TN

August 12, 20236 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Aug 12, 2023, 1:24 PM CDT for 6 counties in Tennessee. It was in force for 66 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 12, 2023, 1:24 PM CDT (18:24 UTC)
Expired
Aug 12, 2023, 2:30 PM CDT
In force
66 min
Issued by
NWS Nashville, TN
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Cumberland County, TN, Fentress County, TN, Overton County, TN, Putnam County, TN, Van Buren County, TN, White County, TN

The radar

The Nashville radar (KOHX), 118 km from the middle of the area, began a volume at 18:24 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 12, 10:50 AM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 6.4 hours before the alert went out and 120 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, Nashville Metro, TN at 12:00Z on 2023-08-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2540 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, Nashville Metro, TN at 12:00Z on 2023-08-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 120 square meters per square second.19395878Sfc1 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
2540 J/kg
Mixed-layer CIN
-67 J/kg
Mixed-layer LCL
811 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
120 m²/s²
0-3 km storm-relative helicity
100 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.3

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 Nashville, TN wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 12, 12:41 PM CDT, 43 minutes earlier.

Area forecast discussion, Aug 12, 12:41 PM CDT, 43 minutes before
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In the hours before

Local storm report, Aug 12, 11:58 AM CDT, 1 hour 26 minutes before
Preliminary Local Storm Report
National Weather Service Nashville TN
1158 AM CDT Sat Aug 12 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1147 AM     Funnel Cloud     3 WSW Brentwood         35.98N 86.83W
08/12/2023                   Williamson         TN   Trained Spotter

            Funnel cloud reported 2 miles north of
            downtown Franklin along Highway 31.

&&

APB
Local storm report, Aug 12, 12:09 PM CDT, 1 hour 15 minutes before
Preliminary Local Storm Report
National Weather Service Nashville TN
1209 PM CDT Sat Aug 12 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1125 AM     Tstm Wnd Dmg     3 NNW Burns             36.09N 87.33W
08/12/2023                   Dickson            TN   Trained Spotter

            Photo of tree down in Dickson on Hurt Lane.

&&

APB
Local storm report, Aug 12, 12:20 PM CDT, 1 hour 4 minutes before
Preliminary Local Storm Report
National Weather Service Nashville TN
1220 PM CDT Sat Aug 12 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1115 AM     Tstm Wnd Dmg     2 S Greenbrier          36.40N 86.80W
08/12/2023                   Robertson          TN   Trained Spotter

            Trees down and estimated wind gusts of 60
            mph...pea size hail...power
            outages...several trees hit by lightning.

&&
Local storm report, Aug 12, 12:47 PM CDT, 37 minutes before
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<head>
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<body>
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    <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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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Local storm report, Aug 12, 12:50 PM CDT, 34 minutes before
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<body>
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    <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.
      </p>
      <p id="message2">
        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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Local storm report, Aug 12, 1:01 PM CDT, 23 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.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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      <p class="small" id="detail">
        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 Nashville, TN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 12, 9:19 AM CDTSpecial Weather StatementOHXHouston, Stewart41 min
Aug 12, 9:55 AM CDTAreal Flood AdvisoryOHXStewart19 min
Aug 12, 10:00 AM CDTSpecial Weather StatementOHXHouston, Montgomery, Stewart30 min
Aug 12, 10:12 AM CDTFlash Flood WarningOHXMontgomery, Stewart108 min
Aug 12, 10:27 AM CDTSevere Thunderstorm WarningOHXCheatham, Montgomery, Robertson33 min
Aug 12, 10:33 AM CDTSpecial Weather StatementOHXDickson, Houston, Humphreys, Montgomery, Stewart57 min
Aug 12, 10:58 AM CDTSpecial Weather StatementOHXRobertson32 min
Aug 12, 11:07 AM CDTSevere Thunderstorm WarningOHXCheatham, Davidson, Robertson, Sumner, Wilson38 min
Aug 12, 11:09 AM CDTSevere Thunderstorm WarningOHXCheatham, Davidson, Dickson, Williamson51 min
Aug 12, 11:26 AM CDTSevere Thunderstorm WarningOHXHickman, Maury, Williamson34 min
Aug 12, 11:44 AM CDTSpecial Weather StatementOHXTrousdale, Wilson31 min
Aug 12, 11:49 AM CDTSevere Thunderstorm WarningOHXDavidson, Rutherford, Smith, Sumner, Trousdale, Williamson and 1 more41 min
Aug 12, 11:56 AM CDTSevere Thunderstorm WarningOHXBedford, Giles, Marshall, Maury, Rutherford, Williamson34 min
Aug 12, 12:04 PM CDTTornado WarningOHXRutherford, Wilson26 min
Aug 12, 12:21 PM CDTTornado WarningOHXCannon, DeKalb, Rutherford, Smith, Wilson26 min
Aug 12, 12:26 PM CDTSevere Thunderstorm Warning Considerable damage threatOHXCannon, DeKalb, Jackson, Putnam, Rutherford, Smith and 2 more33 min
Aug 12, 12:29 PM CDTSevere Thunderstorm WarningOHXBedford, Cannon, Coffee, Grundy, Marshall, Rutherford and 1 more46 min
Aug 12, 12:58 PM CDTSevere Thunderstorm Warning Considerable damage threatOHXDeKalb, Jackson, Overton, Putnam, Smith, Van Buren and 2 more32 min
Aug 12, 1:10 PM CDTSevere Thunderstorm WarningOHXCoffee, Grundy, Van Buren, Warren50 min

Nearby

Severe 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.