Alert archive / Tennessee / Flash Flood Warnings in 2024

Flash Flood Warning 55, NWS Morristown, TN

September 27, 20244 counties in Tennessee

NWS Morristown, TN issued this flash flood warning at Sep 27, 2024, 7:38 PM EDT for 4 counties in Tennessee. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 27, 2024, 7:38 PM EDT (23:38 UTC)
Expired: Sep 28, 2024, 1:30 AM EDT
In force: 6 hr
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Emergency: Flash flood emergency
Damage threat: Catastrophic
Flood severity: None

Counties Carter County, TN, Johnson County, TN, Unicoi County, TN, Washington County, TN

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 11.6 hours before the alert went out and 210 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: 117 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 591 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 311 m²/s²
0-3 km storm-relative helicity: 433 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.3

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Morristown, TN wrote its last area forecast discussion before this flash flood warning went out at Sep 27, 7:35 PM EDT, 3 minutes earlier.

Area forecast discussion, Sep 27, 7:35 PM EDT, 3 minutes before

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Hazardous weather outlook, Sep 27, 4:26 PM EDT, 3 hours 12 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
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        Please try again in a few minutes.
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In the hours before

Local storm report, Sep 27, 1:55 PM EDT, 5 hours 43 minutes before

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Local storm report, Sep 27, 1:59 PM EDT, 5 hours 39 minutes before

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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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      <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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Local storm report, Sep 27, 2:04 PM EDT, 5 hours 34 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.
      </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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Local storm report, Sep 27, 4:23 PM EDT, 3 hours 15 minutes before

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<head>
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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.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
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</body>
</html>

Local storm report, Sep 27, 5:28 PM EDT, 2 hours 10 minutes before

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<html lang="en">
<head>
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  <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.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 26, 11:52 PM EDT	Flash Flood Warning	MRX	Anderson, Blount, Bradley, Knox, Loudon, McMinn and 3 more	3 hr
Sep 27, 4:18 AM EDT	Areal Flood Advisory	MRX	Hamilton, Marion, Sequatchie	5 hr
Sep 27, 4:47 AM EDT	Areal Flood Warning	MRX	Blount, Cocke, Sevier	6 hr
Sep 27, 7:44 AM EDT	Flash Flood Warning	MRX	Hamilton, Marion, Sequatchie	4 hr
Sep 27, 8:50 AM EDT	Areal Flood Warning	MRX	Carter, Greene, Johnson, Unicoi	3 hr
Sep 27, 9:14 AM EDT	Flash Flood Warning EmergencyConsiderable damage threat	MRX	Carter, Unicoi	11 hr
Sep 27, 9:35 AM EDT	Flash Flood Warning EmergencyCatastrophic damage threat	MRX	Johnson	10 hr
Sep 27, 10:02 AM EDT	Flash Flood Warning EmergencyCatastrophic damage threat	MRX	Carter, Unicoi, Washington	7 hr
Sep 27, 10:36 AM EDT	Flash Flood Warning Considerable damage threat	MRX	Cocke, Sevier	7 hr
Sep 27, 11:01 AM EDT	River Flood Warning	MRX	Hamilton	22 hr
Sep 27, 11:26 AM EDT	River Flood Warning	MRX	Carter	15 hr
Sep 27, 12:02 PM EDT	River Flood Warning	MRX	Sevier	21 hr
Sep 27, 2:29 PM EDT	Wind Advisory	MRX	Blount, Carter, Cocke, Greene, Johnson, Monroe and 3 more	24 hr
Sep 27, 2:58 PM EDT	Flash Flood Warning	MRX	Hancock, Hawkins	2 hr
Sep 27, 3:30 PM EDT	Flash Flood Warning EmergencyCatastrophic damage threat	MRX	Cocke, Hamblen, Jefferson	64 min
Sep 27, 4:54 PM EDT	Flash Flood Warning EmergencyCatastrophic damage threat	MRX	Carter, Greene, Johnson, Sullivan, Unicoi, Washington	3 hr
Sep 27, 6:01 PM EDT	Areal Flood Warning	MRX	Cocke, Greene, Jefferson, Sevier	16 hr
Sep 27, 6:25 PM EDT	Areal Flood Warning	MRX	Sullivan	16 hr
Sep 27, 7:29 PM EDT	Flash Flood Warning EmergencyCatastrophic damage threat	MRX	Johnson	6 hr
Sep 27, 7:50 PM EDT	Flash Flood Warning EmergencyCatastrophic damage threat	MRX	Carter, Sullivan, Unicoi, Washington	6 hr
Sep 27, 11:13 AM EDT	Flash Flood Warning	MRX	Russell, Scott, Washington, Wise, City of Bristol, City of Norton	4 hr
Sep 27, 2:43 PM EDT	Flash Flood Warning EmergencyCatastrophic damage threat	MRX	Washington, City of Bristol	5 hr

Nearby

Flash Flood Warnings in Tennessee, 2024 Every flash flood warning in 2024

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.