Alert archive / Tennessee / Areal Flood Advisories in 2021

Areal Flood Advisory 74, NWS Nashville, TN

August 10, 2021Cumberland County, Tennessee

NWS Nashville, TN issued this areal flood advisory at Aug 10, 2021, 3:17 PM CDT for Cumberland County, Tennessee. It was in force for 118 min.

The area

The counties it named.

The facts

Issued: Aug 10, 2021, 3:17 PM CDT (20:17 UTC)
Expired: Aug 10, 2021, 5:15 PM CDT
In force: 118 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

County Cumberland County, TN

The radar

The Nashville radar (KOHX), 144 km from the middle of the area, began a volume at 20:21 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, 8.3 hours before the alert went out and 145 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: 1950 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 904 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 51 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 areal flood 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 areal flood advisory went out at Aug 10, 2:13 PM CDT, 1 hour 4 minutes earlier.

Area forecast discussion, Aug 10, 2:13 PM CDT, 1 hour 4 minutes before

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Hazardous weather outlook, Aug 10, 5:11 AM CDT, 10 hours 6 minutes before

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</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.
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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 Nashville, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 9, 7:53 PM CDT	Special Weather Statement	OHX	Cumberland	37 min
Aug 10, 1:38 PM CDT	Heat Advisory	OHX	Bedford, Cannon, Cheatham, Clay, Coffee, Davidson and 24 more	30 hr
Aug 10, 1:38 PM CDT	Heat Advisory	OHX	Bedford, Cannon, Cheatham, Clay, Coffee, Davidson and 24 more	54 hr

Nearby

Areal Flood Advisories in Tennessee, 2021 Every areal flood 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.