Alert archive / Tennessee / Special Weather Statements in 2018

Special Weather Statement, NWS Nashville, TN

August 9, 2018Cannon County, Tennessee

NWS Nashville, TN issued this special weather statement at Aug 9, 2018, 11:50 AM CDT for Cannon County, Tennessee. It was in force for 40 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: Aug 9, 2018, 11:50 AM CDT (16:50 UTC)
Expired: Aug 9, 2018, 12:30 PM CDT
In force: 40 min
Issued by: NWS Nashville, TN

County Cannon County, TN

The radar

The Nashville radar (KOHX), 55 km from the middle of the area, began a volume at 16:51 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, 4.8 hours before the alert went out and 51 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: 407 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 876 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: 75 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Aug 9, 10:37 AM CDT, 1 hour 13 minutes earlier.

Area forecast discussion, Aug 9, 10:37 AM CDT, 1 hour 13 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>
      <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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Hazardous weather outlook, Aug 9, 8:15 AM CDT, 3 hours 35 minutes before

Hazardous Weather Outlook
National Weather Service Nashville TN
815 AM CDT Thu Aug 9 2018

TNZ005>011-023>034-056>066-075-077>080-093>095-101315-
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-
815 AM CDT Thu Aug 9 2018

This Hazardous Weather Outlook is for portions of Middle
Tennessee.

.DAY ONE...Today and Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

In the hours before

Special weather statement, Aug 9, 11:25 AM CDT, 25 minutes before

Special Weather Statement
National Weather Service Nashville TN
1125 AM CDT THU AUG 9 2018

TNZ028-091700-
Wilson TN-
1125 AM CDT THU AUG 9 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN WILSON COUNTY UNTIL
NOON CDT...

At 1125 AM CDT, Doppler radar was tracking a strong thunderstorm near
Walterhill, or 11 miles south of Lebanon, moving east at 20 mph.

Winds in excess of 30 mph will be possible with this storm.

Locations impacted include...
Watertown, Cedars Of Lebanon State Park and Tuckers Crossroads.

LAT...LON 3620 8609 3619 8610 3612 8607 3606 8606
      3606 8605 3604 8605 3603 8604 3601 8604
      3600 8603 3597 8628 3599 8633 3602 8638
      3601 8638 3604 8639 3603 8640 3604 8642
      3610 8644 3623 8612
TIME...MOT...LOC 1625Z 250DEG 18KT 3604 8635

27

Special weather statement, Aug 9, 11:50 AM CDT, 0 minutes before

Special Weather Statement
National Weather Service Nashville TN
1150 AM CDT THU AUG 9 2018

TNZ028-062-063-091730-
Cannon TN-Rutherford TN-Wilson TN-
1150 AM CDT THU AUG 9 2018

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL RUTHERFORD...
SOUTHEASTERN WILSON AND NORTHERN CANNON COUNTIES UNTIL 1230 PM CDT...

At 1150 AM CDT, Doppler radar was tracking a strong thunderstorm 8
miles east of Walterhill, or 11 miles northeast of Murfreesboro,
moving east at 25 mph.

Winds in excess of 30 mph will be possible with this storm.

Locations impacted include...
Woodbury, Auburntown, Lascassas and Milton.

LAT...LON 3600 8603 3596 8602 3590 8594 3579 8595
      3587 8632 3598 8631 3601 8604
TIME...MOT...LOC 1650Z 275DEG 23KT 3596 8623

27

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 11:25 AM CDT	Special Weather Statement	OHX	Wilson	35 min
Aug 9, 12:36 PM CDT	Special Weather Statement	OHX	DeKalb	24 min
Aug 9, 1:13 PM CDT	Special Weather Statement	OHX	Putnam	47 min
Aug 9, 1:19 PM CDT	Special Weather Statement	OHX	Coffee	26 min
Aug 9, 1:57 PM CDT	Special Weather Statement	OHX	Cumberland	48 min
Aug 9, 2:17 PM CDT	Special Weather Statement	OHX	Van Buren	28 min
Aug 9, 3:03 PM CDT	Special Weather Statement	OHX	Dickson, Houston	42 min
Aug 9, 6:51 PM CDT	Special Weather Statement	OHX	Perry	24 min

Nearby

Special Weather Statements in Tennessee, 2018 Every special weather statement in 2018

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.