Alert archive / Tennessee / Flash Flood Watches in 2020
Flash Flood Watch 3, NWS Nashville, TN
NWS Nashville, TN issued this flash flood watch at Mar 24, 2020, 3:12 AM CDT for 11 counties in Tennessee. It took effect at Mar 24, 2020, 7:00 AM CDT. It was in force for 15 hr.
The area
The counties it named.
The facts
- Issued
- Mar 24, 2020, 3:12 AM CDT (08:12 UTC)
- In effect from
- Mar 24, 2020, 7:00 AM CDT
- Expired
- Mar 24, 2020, 10:28 PM CDT
- In force
- 15 hr
- Issued by
- NWS Nashville, TN
- Flood severity
- None
Counties Bedford County, TN, Coffee County, TN, Giles County, TN, Grundy County, TN, Lawrence County, TN, Lewis County, TN, Marshall County, TN, Maury County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN
The radar
The Northeast Alabama radar (KHTX), 77 km from the middle of the area, began a volume at 08:13 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
Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 8.2 hours before the alert went out and 304 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
- 180 J/kg
- Mixed-layer CIN
- -67 J/kg
- Mixed-layer LCL
- 697 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 280 m²/s²
- 0-3 km storm-relative helicity
- 335 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.8
What forecasters said that day
The local office's own words before this flash flood watch 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 flash flood watch went out at Mar 24, 1:12 AM CDT, 2 hours earlier.
Area forecast discussion, Mar 24, 1:12 AM CDT, 2 hours before
<!doctype html>
<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.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Hazardous weather outlook, Mar 23, 5:00 AM CDT, 22 hours 12 minutes before
<!doctype html>
<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.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>The office that day
Everything else NWS Nashville, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 24, 7:24 AM CDT | River Flood Advisory | OHX | Decatur, Hardin, Perry, Wayne | 24 hr |
| Mar 24, 7:33 AM CDT | River Flood Advisory | OHX | Giles | 65 hr |
| Mar 24, 8:37 AM CDT | Areal Flood Advisory | OHX | Giles, Lawrence, Wayne | 3 hr |
| Mar 24, 9:14 AM CDT | River Flood Advisory | OHX | Perry | 67 hr |
| Mar 24, 3:21 PM CDT | River Flood Advisory | OHX | Davidson | 4 days |
| Mar 24, 3:26 PM CDT | River Flood Advisory | OHX | Hickman | 22 hr |
| Mar 24, 4:50 PM CDT | Special Weather Statement | OHX | Lewis, Wayne | 25 min |
| Mar 24, 4:57 PM CDT | Severe Thunderstorm Warning | OHX | Lawrence, Lewis, Wayne | 33 min |
| Mar 24, 5:27 PM CDT | Tornado Warning | OHX | Giles, Lawrence | 33 min |
| Mar 24, 5:39 PM CDT | Areal Flood Advisory | OHX | Clay, Jackson, Macon, Overton, Pickett, Smith and 3 more | 3 hr |
| Mar 24, 5:42 PM CDT | Areal Flood Advisory | OHX | Bedford, Giles, Lawrence, Lewis, Marshall, Maury and 1 more | 3 hr |
| Mar 24, 5:49 PM CDT | Areal Flood Advisory | OHX | Davidson, Rutherford, Sumner, Williamson, Wilson | 3 hr |
| Mar 24, 5:52 PM CDT | Flash Flood Warning | OHX | Giles, Lawrence, Marshall, Maury | 83 min |
| Mar 24, 6:00 PM CDT | Severe Thunderstorm Warning | OHX | Giles, Marshall | 30 min |
| Mar 24, 6:14 PM CDT | Flash Flood Warning | OHX | Davidson, Macon, Smith, Sumner, Trousdale, Wilson | 91 min |
Nearby
Flash Flood Watches in Tennessee, 2020Every flash flood watch in 2020
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.