Alert archive / Tennessee / Areal Flood Advisories in 2021

Areal Flood Advisory 47, NWS Nashville, TN

July 17, 20214 counties in Tennessee

NWS Nashville, TN issued this areal flood advisory at Jul 17, 2021, 10:09 PM CDT for 4 counties in Tennessee. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued: Jul 17, 2021, 10:09 PM CDT (03:09 UTC)
Expired: Jul 18, 2021, 12:15 AM CDT
In force: 2 hr
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Davidson County, TN, Sumner County, TN, Trousdale County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 14 km from the middle of the area, began a volume at 03:12 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.

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 Jul 17, 9:58 PM CDT, 11 minutes earlier.

Area forecast discussion, Jul 17, 9:58 PM CDT, 11 minutes before

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Hazardous weather outlook, Jul 17, 2:48 AM CDT, 19 hours 21 minutes before

Hazardous Weather Outlook
National Weather Service Nashville TN
248 AM CDT Sat Jul 17 2021

TNZ005>011-023>034-056>066-075-077>080-093>095-181030-
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-
248 AM CDT Sat Jul 17 2021

This Hazardous Weather Outlook is for Middle Tennessee.

.DAY ONE...Today and tonight.

Scattered to numerous showers and thunderstorms are expected across
the area later today and early tonight. Isolated storms could be
strong with gusty winds and locally heavy rain...especially across
the east.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Scattered to numerous showers and thunderstorms are expected across
Middle Tennessee Sunday as well. A few storms could be strong with
gusty winds and locally heavy rain.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

07

In the hours before

Special weather statement, Jul 17, 6:31 PM CDT, 3 hours 38 minutes before

Special Weather Statement
National Weather Service Nashville TN
631 PM CDT Sat Jul 17 2021

TNZ028-029-180000-
Wilson TN-Trousdale TN-
631 PM CDT Sat Jul 17 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN WILSON AND SOUTHWESTERN
TROUSDALE COUNTIES UNTIL 700 PM CDT...

At 630 PM CDT, Doppler radar was tracking a strong thunderstorm near
Lebanon, moving southeast at 20 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Old Hickory Lake, Lebanon, Hartsville, Tuckers Crossroads and
Dickerson Chapel Recreation Area.

This includes the following highways...
 Interstate 40 between mile markers 232 and 245.
 Interstate 840 between mile markers 73 and 76.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3621 8611 3611 8638 3629 8648 3631 8643
      3631 8639 3632 8639 3634 8635 3631 8636
      3632 8634 3631 8630 3634 8629 3636 8628
      3640 8618
TIME...MOT...LOC 2330Z 331DEG 16KT 3625 8628

05

Special weather statement, Jul 17, 6:58 PM CDT, 3 hours 11 minutes before

Special Weather Statement
National Weather Service Nashville TN
658 PM CDT Sat Jul 17 2021

TNZ028-030-180030-
Wilson TN-Smith TN-
658 PM CDT Sat Jul 17 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN SMITH AND CENTRAL
WILSON COUNTIES UNTIL 730 PM CDT...

At 657 PM CDT, Doppler radar was tracking a strong thunderstorm near
Lebanon, moving southeast at 15 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Lebanon, Watertown, Cedars Of Lebanon State Park, Tuckers Crossroads
and Gladeville.

This includes the following highways...
 Interstate 40 between mile markers 230 and 257.
 Interstate 840 between mile markers 70 and 76.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3613 8595 3601 8638 3624 8648 3631 8616
      3629 8613 3632 8611 3634 8604
TIME...MOT...LOC 2357Z 324DEG 12KT 3623 8623

05

Local storm report, Jul 17, 9:11 PM CDT, 58 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 7:16 PM CDT	Areal Flood Advisory	OHX	Wilson	119 min
Jul 17, 7:38 PM CDT	Areal Flood Advisory	OHX	Lawrence	112 min
Jul 17, 8:00 PM CDT	Flash Flood Warning	OHX	Lawrence	3 hr
Jul 17, 8:40 PM CDT	Areal Flood Advisory	OHX	Lawrence, Wayne	3 hr
Jul 17, 9:03 PM CDT	Flash Flood Warning	OHX	Lawrence	117 min
Jul 17, 9:07 PM CDT	Areal Flood Advisory	OHX	Montgomery, Robertson, Sumner	113 min
Jul 17, 11:19 PM CDT	Areal Flood Advisory	OHX	Smith, Trousdale	116 min
Jul 18, 3:54 PM CDT	Special Weather Statement	OHX	Davidson	51 min
Jul 18, 4:03 PM CDT	Areal Flood Advisory	OHX	Davidson, Williamson	117 min
Jul 18, 4:27 PM CDT	Areal Flood Advisory	OHX	Davidson, Rutherford, Williamson, Wilson	2 hr
Jul 18, 4:31 PM CDT	Flash Flood Warning	OHX	Davidson	89 min
Jul 18, 4:42 PM CDT	Areal Flood Advisory	OHX	Cumberland	3 hr
Jul 18, 6:08 PM CDT	Areal Flood Advisory	OHX	Giles	112 min
Jul 18, 6:11 PM CDT	Areal Flood Advisory	OHX	DeKalb	2 hr
Jul 18, 6:14 PM CDT	Areal Flood Advisory	OHX	Sumner, Wilson	2 hr
Jul 18, 6:17 PM CDT	Areal Flood Advisory	OHX	Perry	118 min

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; radar from the NEXRAD Level II archive.