Alert archive / Tennessee / Areal Flood Advisories in 2021
Areal Flood Advisory 79, NWS Nashville, TN
NWS Nashville, TN issued this areal flood advisory at Aug 13, 2021, 2:53 PM CDT for Hickman County, Humphreys County, Perry County, Tennessee. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Aug 13, 2021, 2:53 PM CDT (19:53 UTC)
- Expired
- Aug 13, 2021, 5:00 PM CDT
- In force
- 2 hr
- Issued by
- NWS Nashville, TN
- Area
- Storm-based polygon
Counties Hickman County, TN, Humphreys County, TN, Perry County, TN
The radar
The Ft Campbell radar (KHPX), 108 km from the middle of the area, began a volume at 19:54 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, 7.9 hours before the alert went out and 105 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
- 1072 J/kg
- Mixed-layer CIN
- -119 J/kg
- Mixed-layer LCL
- 1013 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 54 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 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 13, 1:55 PM CDT, 58 minutes earlier.
Area forecast discussion, Aug 13, 1:55 PM CDT, 58 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>Hazardous weather outlook, Aug 13, 5:00 AM CDT, 9 hours 53 minutes before
Hazardous Weather Outlook National Weather Service Nashville TN 500 AM CDT Fri Aug 13 2021 TNZ005>011-023>034-056>066-075-077>080-093>095-141000- Stewart-Montgomery-Robertson-Sumner-Macon-Clay-Pickett-Houston- Humphreys-Dickson-Cheatham-Davidson-Wilson-Trousdale-Smith-Jackson- Putnam-Overton-Fentress-Perry-Hickman-Lewis-Williamson-Maury- Marshall-Rutherford-Cannon-De Kalb-White-Cumberland-Bedford-Coffee- Warren-Grundy-Van Buren-Wayne-Lawrence-Giles- 500 AM CDT Fri Aug 13 2021 This Hazardous Weather Outlook is for Middle Tennessee. .DAY ONE...Today and tonight. Scattered thunderstorms are expected today across the mid state. Some of these storms may produce strong wind gusts and heavy rainfall. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. 08
In the hours before
Special weather statement, Aug 13, 12:37 PM CDT, 2 hours 16 minutes before
Special Weather Statement
National Weather Service Nashville TN
1237 PM CDT Fri Aug 13 2021
TNZ094-095-131830-
Lawrence TN-Giles TN-
1237 PM CDT Fri Aug 13 2021
...A strong thunderstorm will impact portions of east central
Lawrence and western Giles Counties through 130 PM CDT...
At 1237 PM CDT, Doppler radar was tracking a strong thunderstorm 8
miles southeast of Lawrenceburg, moving east at 10 mph.
HAZARD...Winds in excess of 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Lawrenceburg, Pulaski and Goodspring.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3508 8726 3525 8737 3535 8702 3508 8695
TIME...MOT...LOC 1737Z 257DEG 10KT 3519 8720
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
13Special weather statement, Aug 13, 12:57 PM CDT, 1 hour 56 minutes before
Special Weather Statement
National Weather Service Nashville TN
1257 PM CDT Fri Aug 13 2021
TNZ062-131845-
Rutherford TN-
1257 PM CDT Fri Aug 13 2021
...A strong thunderstorm will impact portions of central Rutherford
County through 145 PM CDT...
At 1257 PM CDT, Doppler radar was tracking a strong thunderstorm near
Smyrna, or near Murfreesboro, moving east at 10 mph.
HAZARD...Winds in excess of 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Murfreesboro, Smyrna, La Vergne and Walterhill.
This includes the following highways...
Interstate 24 between mile markers 68 and 79.
Interstate 840 between mile markers 49 and 62.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3582 8654 3600 8656 3600 8637 3585 8629
TIME...MOT...LOC 1757Z 265DEG 8KT 3592 8646
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
13Special weather statement, Aug 13, 1:20 PM CDT, 1 hour 33 minutes before
Special Weather Statement
National Weather Service Nashville TN
120 PM CDT Fri Aug 13 2021
TNZ027-059-062-131845-
Rutherford TN-Williamson TN-Davidson TN-
120 PM CDT Fri Aug 13 2021
...A strong thunderstorm will impact portions of south central
Davidson, west central Rutherford and northeastern Williamson
Counties through 145 PM CDT...
At 120 PM CDT, Doppler radar was tracking a strong thunderstorm over
Nolensville, or 10 miles east of Franklin, moving east at 5 mph.
HAZARD...Winds in excess of 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Smyrna, Brentwood, La Vergne and Nolensville.
This includes the following highways...
Interstate 24 between mile markers 63 and 64.
Interstate 840 near mile marker 48.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3586 8675 3602 8675 3602 8660 3586 8655
TIME...MOT...LOC 1820Z 268DEG 5KT 3596 8667
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
13Special weather statement, Aug 13, 1:31 PM CDT, 1 hour 22 minutes before
Special Weather Statement
National Weather Service Nashville TN
131 PM CDT Fri Aug 13 2021
TNZ028-131900-
Wilson TN-
131 PM CDT Fri Aug 13 2021
...A strong thunderstorm will impact portions of southeastern Wilson
County through 200 PM CDT...
At 131 PM CDT, Doppler radar was tracking a strong thunderstorm near
Watertown, or 12 miles southeast of Lebanon, moving east at 10 mph.
HAZARD...Winds in excess of 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Watertown.
This includes Interstate 40 between mile markers 247 and 250.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3619 8610 3615 8608 3599 8605 3598 8628
3612 8633
TIME...MOT...LOC 1831Z 256DEG 8KT 3606 8622
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
13Special weather statement, Aug 13, 1:40 PM CDT, 1 hour 13 minutes before
Special Weather Statement
National Weather Service Nashville TN
140 PM CDT Fri Aug 13 2021
TNZ059-131930-
Williamson TN-
140 PM CDT Fri Aug 13 2021
...A strong thunderstorm will impact portions of central Williamson
County through 230 PM CDT...
At 139 PM CDT, Doppler radar was tracking strong thunderstorm near
Franklin, moving east at 10 mph.
HAZARD...Winds in excess of 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Franklin, Brentwood, Spring Hill, Nolensville, Thompson's Station,
Leipers Fork and Natchez Trace At Highway 96.
This includes the following highways...
Interstate 65 between mile markers 57 and 71.
Interstate 840 between mile markers 12 and 19, and between mile
markers 21 and 39.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3600 8670 3598 8666 3576 8673 3585 8720
3601 8699
TIME...MOT...LOC 1839Z 256DEG 8KT 3589 8689
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
13Local storm report, Aug 13, 2:23 PM CDT, 30 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 |
|---|---|---|---|---|
| Aug 13, 12:16 PM CDT | Special Weather Statement | OHX | Marshall | 44 min |
| Aug 13, 12:37 PM CDT | Special Weather Statement | OHX | Giles | 53 min |
| Aug 13, 12:57 PM CDT | Special Weather Statement | OHX | Rutherford | 48 min |
| Aug 13, 1:05 PM CDT | Severe Thunderstorm Warning | OHX | Rutherford | 25 min |
| Aug 13, 1:20 PM CDT | Special Weather Statement | OHX | Williamson | 25 min |
| Aug 13, 1:31 PM CDT | Special Weather Statement | OHX | Wilson | 29 min |
| Aug 13, 1:40 PM CDT | Special Weather Statement | OHX | Williamson | 50 min |
| Aug 13, 2:03 PM CDT | Areal Flood Advisory | OHX | Williamson | 117 min |
| Aug 13, 2:38 PM CDT | Areal Flood Advisory | OHX | Lawrence, Wayne | 2 hr |
| Aug 13, 2:47 PM CDT | Areal Flood Advisory | OHX | Davidson | 118 min |
| Aug 13, 2:51 PM CDT | Severe Thunderstorm Warning | OHX | Cheatham, Dickson, Hickman, Williamson | 39 min |
| Aug 13, 2:56 PM CDT | Areal Flood Advisory | OHX | Dickson, Hickman, Williamson | 2 hr |
| Aug 13, 3:24 PM CDT | Special Weather Statement | OHX | Hickman, Lewis, Perry | 51 min |
| Aug 13, 3:28 PM CDT | Flash Flood Warning | OHX | Hickman, Humphreys, Perry | 2 hr |
Nearby
Areal Flood Advisories in Tennessee, 2021Every 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.