Alert archive / Tennessee / Winter Weather Advisories in 2021

Winter Weather Advisory 6, NWS Nashville, TN

February 10, 202117 counties in Tennessee

NWS Nashville, TN issued this winter weather advisory at Feb 10, 2021, 3:00 AM CST for 17 counties in Tennessee. It took effect at Feb 10, 2021, 9:00 PM CST. It was in force for 18 hr.

The area

The counties it named.

The facts

Issued: Feb 10, 2021, 3:00 AM CST (09:00 UTC)
In effect from: Feb 10, 2021, 9:00 PM CST
Expired: Feb 11, 2021, 2:55 PM CST
In force: 18 hr
Issued by: NWS Nashville, TN

Counties Cheatham County, TN, Clay County, TN, Davidson County, TN, Dickson County, TN, Fentress County, TN, Hickman County, TN, Humphreys County, TN, Jackson County, TN, Macon County, TN, Overton County, TN, Perry County, TN, Pickett County, TN, Smith County, TN, Sumner County, TN, Trousdale County, TN, Williamson County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 16 km from the middle of the area, began a volume at 09:03 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

Birmingham, AL (KBMX), launched 00:00Z, 9.0 hours before the alert went out and 341 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1239 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 72 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 winter weather advisory 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 winter weather advisory went out at Feb 9, 10:53 PM CST, 4 hours 7 minutes earlier.

Area forecast discussion, Feb 9, 10:53 PM CST, 4 hours 7 minutes before

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Hazardous weather outlook, Feb 9, 10:55 PM CST, 4 hours 5 minutes before

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In the hours before

Special weather statement, Feb 9, 9:23 PM CST, 5 hours 37 minutes before

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<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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The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 10, 3:00 AM CST	Ice Storm Warning	OHX	Houston, Montgomery, Robertson, Stewart	33 hr

Nearby

Winter Weather Advisories in Tennessee, 2021 Every winter weather advisory in 2021

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.