Alert archive / Tennessee / Special Weather Statements in 2020

Special Weather Statement, NWS Nashville, TN

June 30, 2020Humphreys County, Tennessee

NWS Nashville, TN issued this special weather statement at Jun 30, 2020, 2:30 PM CDT for Humphreys County, Tennessee. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 30, 2020, 2:30 PM CDT (19:30 UTC)
Expired
Jun 30, 2020, 3:00 PM CDT
In force
30 min
Issued by
NWS Nashville, TN

County Humphreys County, TN

The radar

The Ft Campbell radar (KHPX), 100 km from the middle of the area, began a volume at 19:34 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

Nashville Metro, TN (KBNA), launched 12:00Z, 7.5 hours before the alert went out and 114 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 2020-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 394 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 2020-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 38 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
394 J/kg
Mixed-layer CIN
-75 J/kg
Mixed-layer LCL
1039 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
38 m²/s²
0-3 km storm-relative helicity
48 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jun 30, 12:55 PM CDT, 1 hour 35 minutes earlier.

Area forecast discussion, Jun 30, 12:55 PM CDT, 1 hour 35 minutes before
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<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<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.
      </p>
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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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Hazardous weather outlook, Jun 30, 5:22 AM CDT, 9 hours 8 minutes before
Hazardous Weather Outlook
National Weather Service Nashville TN
522 AM CDT Tue Jun 30 2020

TNZ005>011-023>034-056>066-075-077>080-093>095-011030-
Stewart-Montgomery-Robertson-Sumner-Macon-Clay-Pickett-Houston-
Humphreys-Dickson-Cheatham-Davidson-Wilson-Trousdale-Smith-Jackson-
Putnam-Overton-Fentress-Perry-Hickman-Lewis-Williamson-Maury-
Marshall-Rutherford-Cannon-De Kalb-White-Cumberland-Bedford-Coffee-
Warren-Grundy-Van Buren-Wayne-Lawrence-Giles-
522 AM CDT Tue Jun 30 2020

This Hazardous Weather Outlook is for portions of Middle Tennessee.

.DAY ONE...Today and Tonight.

Strong to severe thunderstorms are possible later today and tonight.
Strong to damaging wind is the main threat. Localized flooding is
also possible.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Strong to severe thunderstorms are again possible on Wednesday.
Strong to damaging wind again the main threat. The potential
for localized flooding is also possible Wednesday into Thursday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed. Please relay any
information about observed severe weather to the NWS while following
all local, state, and CDC guidelines.

07

In the hours before

Special weather statement, Jun 30, 9:54 AM CDT, 4 hours 36 minutes before
Special Weather Statement
National Weather Service Nashville TN
954 AM CDT Tue Jun 30 2020

TNZ008-027-028-301530-
Davidson TN-Wilson TN-Sumner TN-
954 AM CDT Tue Jun 30 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN DAVIDSON...SOUTHERN
SUMNER AND NORTHWESTERN WILSON COUNTIES UNTIL 1030 AM CDT...

At 954 AM CDT, Doppler radar was tracking a strong thunderstorm over
Lakewood, moving east at 25 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Gallatin, Lebanon, Madison, Hendersonville, Mount Juliet,
Goodlettsville, Lakewood, Hermitage, Belinda City, Old Hickory, Rural
Hill, Green Hill, Bledsoe Creek State Park and Percy Priest Lake.

This includes the following highways...
 Interstate 40 between mile markers 216 and 242.
 Interstate 65 between mile markers 92 and 97.
 Interstate 840 between mile markers 75 and 76.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3644 8632 3618 8622 3611 8668 3631 8676
TIME...MOT...LOC 1454Z 254DEG 20KT 3622 8661

Shamburger
Special weather statement, Jun 30, 10:39 AM CDT, 3 hours 51 minutes before
Special Weather Statement
National Weather Service Nashville TN
1039 AM CDT Tue Jun 30 2020

TNZ028-030-064-301615-
Wilson TN-De Kalb TN-Smith TN-
1039 AM CDT Tue Jun 30 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN SMITH...NORTHWESTERN DE
KALB AND SOUTHEASTERN WILSON COUNTIES UNTIL 1115 AM CDT...

At 1039 AM CDT, Doppler radar was tracking a strong thunderstorm near
Shop Springs, or 8 miles east of Lebanon, moving east at 30 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Lebanon, Carthage, Watertown, Gordonsville, Hickman, South Carthage,
Alexandria, Dowelltown, Liberty and Tuckers Crossroads.

This includes Interstate 40 between mile markers 239 and 264.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3601 8628 3624 8630 3628 8586 3601 8583
TIME...MOT...LOC 1539Z 267DEG 27KT 3616 8619

Shamburger
Special weather statement, Jun 30, 1:31 PM CDT, 59 minutes before
Special Weather Statement
National Weather Service Nashville TN
131 PM CDT Tue Jun 30 2020

TNZ023-024-301900-
Humphreys TN-Houston TN-
131 PM CDT Tue Jun 30 2020

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL HOUSTON AND NORTHEASTERN
HUMPHREYS COUNTIES UNTIL 200 PM CDT...

At 130 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles southwest of Tennessee Ridge, or 9 miles southwest of Erin,
moving east at 10 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Erin, Tennessee Ridge and Houston County Airport.

LAT...LON 3632 8796 3634 8765 3615 8764 3620 8794
      3621 8794 3622 8795 3625 8795 3626 8794
TIME...MOT...LOC 1830Z 269DEG 7KT 3624 8785

Shamburger
Special weather statement, Jun 30, 2:30 PM CDT, 0 minutes before
Special Weather Statement
National Weather Service Nashville TN
230 PM CDT Tue Jun 30 2020

TNZ024-302000-
Humphreys TN-
230 PM CDT Tue Jun 30 2020

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL HUMPHREYS COUNTY UNTIL
300 PM CDT...

At 229 PM CDT, Doppler radar was tracking a strong thunderstorm over
New Johnsonville, moving east at 30 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Waverly, New Johnsonville, McEwen and Hurricane Mills.

This includes Interstate 40 between mile markers 140 and 148.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3600 8800 3603 8800 3611 8793 3613 8764
      3593 8763 3591 8766 3592 8768 3591 8770
      3587 8771 3587 8794 3594 8793 3594 8798
      3595 8801 3597 8802
TIME...MOT...LOC 1929Z 268DEG 25KT 3600 8793

Shamburger

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 29, 7:22 PM CDTSpecial Weather StatementOHXStewart38 min
Jun 30, 9:54 AM CDTSpecial Weather StatementOHXSumner36 min
Jun 30, 10:12 AM CDTAreal Flood AdvisoryOHXDavidson, Sumner, Wilson3 hr
Jun 30, 10:39 AM CDTSpecial Weather StatementOHXSmith, Wilson36 min
Jun 30, 1:31 PM CDTSpecial Weather StatementOHXHouston29 min
Jun 30, 2:54 PM CDTSpecial Weather StatementOHXHickman36 min
Jun 30, 3:16 PM CDTSpecial Weather StatementOHXHickman, Lewis, Perry44 min
Jun 30, 3:41 PM CDTSpecial Weather StatementOHXGiles34 min
Jun 30, 3:47 PM CDTSpecial Weather StatementOHXLewis, Maury43 min
Jun 30, 4:07 PM CDTSevere Thunderstorm WarningOHXGiles, Lawrence, Lewis, Marshall, Maury38 min
Jun 30, 4:27 PM CDTAreal Flood AdvisoryOHXGiles, Marshall3 hr
Jun 30, 4:43 PM CDTSevere Thunderstorm WarningOHXGiles47 min
Jun 30, 5:19 PM CDTSpecial Weather StatementOHXLawrence41 min

Nearby

Special Weather Statements in Tennessee, 2020Every special weather statement in 2020

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.