Alert archive / Tennessee / Areal Flood Warnings in 2021
Areal Flood Warning 29, NWS Morristown, TN
NWS Morristown, TN issued this areal flood warning at Sep 20, 2021, 8:55 AM EDT for Hamilton County, Tennessee. It was in force for 3 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 20, 2021, 8:55 AM EDT (12:55 UTC)
- Expired
- Sep 20, 2021, 12:00 PM EDT
- In force
- 3 hr
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Flood severity
- None
County Hamilton County, TN
The radar
The Northeast Alabama radar (KHTX), 88 km from the middle of the area, began a volume at 12:56 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 12:00Z, 0.9 hours before the alert went out and 268 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.
- Mixed-layer CAPE
- 513 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 460 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 73 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this areal 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 areal flood warning went out at Sep 19, 7:18 PM EDT, 13 hours 37 minutes earlier.
Area forecast discussion, Sep 19, 7:18 PM EDT, 13 hours 37 minutes before
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</html>Hazardous weather outlook, Sep 19, 3:26 PM EDT, 17 hours 29 minutes before
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<link rel="stylesheet" href="index.css">
</head>
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<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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</html>The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 19, 9:28 PM EDT | River Flood Warning | MRX | Bledsoe, Marion, Sequatchie | 3 days |
| Sep 19, 11:18 PM EDT | Areal Flood Warning | MRX | Hamilton | 10 hr |
| Sep 20, 10:27 AM EDT | Wind Advisory | MRX | Blount, Carter, Cocke, Greene, Monroe, Sevier and 1 more | 20 hr |
| Sep 20, 2:53 PM EDT | Flash Flood Warning | MRX | Hamilton, Marion | 4 hr |
Nearby
Areal Flood Warnings in Tennessee, 2021Every areal flood warning 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.