Alert archive / Tennessee / Flash Flood Warnings in 2026

Flash Flood Warning 38, NWS Nashville, TN

July 21, 2026Cannon County, Rutherford County, Williamson County, Tennessee

NWS Nashville, TN issued this flash flood warning at Jul 21, 2026, 8:33 PM CDT for Cannon County, Rutherford County, Williamson County, Tennessee. It was in force for 6 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 21, 2026, 8:33 PM CDT (01:33 UTC)
Expired: Jul 22, 2026, 2:45 AM CDT
In force: 6 hr
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Flood severity: None

Counties Cannon County, TN, Rutherford County, TN, Williamson County, TN

The radar

The Nashville radar (KOHX), 45 km from the middle of the area, began a volume at 01:32 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 was reported inside it

Time	Report	Where	Remark
Jul 21, 11:00 PM CDT	FLASH FLOOD	3 Nw Brentwood, TN	Flooding reported along the Little Harpeth River, including around the golf course and walking trails.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this flash flood warning; the first came 147 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 1.6 hours before the alert went out and 32 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: 2403 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1248 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 172 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 13.1

Open this sounding in Storm Lab

The text

As transmitted.

456 
WGUS54 KOHX 220133
FFWOHX
TNC015-149-187-220445-
/O.NEW.KOHX.FF.W.0038.260722T0133Z-260722T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
833 PM CDT Tue Jul 21 2026

The National Weather Service in Nashville has issued a

* Flash Flood Warning for...
  Cannon County in middle Tennessee...
  Rutherford County in middle Tennessee...
  Williamson County in middle Tennessee...

* Until 1145 PM CDT.

* At 833 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Rainfall amounts of 1 to 3 
  inches are possible in the warned area. Flash flooding is ongoing 
  or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Murfreesboro, Franklin, Woodbury, Smyrna, Brentwood, La Vergne, 
  Spring Hill, Nolensville, Thompson's Station, Walterhill, 
  Fairview, Eagleville, Auburntown, Rockvale, Triune, Christiana, 
  Fosterville, Lascassas, Milton and Readyville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3585 8721 3597 8721 3605 8718 3605 8705
      3599 8704 3605 8693 3597 8661 3610 8652
      3596 8625 3596 8602 3583 8589 3573 8599
      3565 8600 3565 8609 3571 8622 3563 8625
      3566 8634 3562 8640 3570 8654 3570 8677

FLASH FLOOD...RADAR INDICATED

$$

Mueller

3 follow-up statements

365 
WGUS74 KOHX 220248 RRB
FFSOHX

Flash Flood Statement
National Weather Service Nashville TN
948 PM CDT Tue Jul 21 2026

TNC015-149-187-220445-
/O.CON.KOHX.FF.W.0038.000000T0000Z-260722T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cannon TN-Rutherford TN-Williamson TN-
948 PM CDT Tue Jul 21 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT THIS 
EVENING FOR CANNON, RUTHERFORD AND WILLIAMSON COUNTIES...

At 948 PM CDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Between 1 and 3 inches of rain have 
fallen. Additional rainfall amounts of 1 to 2 inches are possible in 
the warned area. Flash flooding is ongoing or expected to begin 
shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Murfreesboro, Franklin, Woodbury, Smyrna, Brentwood, La Vergne, 
  Spring Hill, Nolensville, Thompson's Station, Walterhill, 
  Fairview, Eagleville, Auburntown, Rockvale, Triune, Christiana, 
  Fosterville, Lascassas, Milton and Readyville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3585 8721 3597 8721 3605 8718 3605 8705
      3599 8704 3605 8693 3597 8661 3610 8652
      3596 8625 3596 8602 3583 8589 3573 8599
      3565 8600 3565 8609 3571 8622 3563 8625
      3566 8634 3562 8640 3570 8654 3570 8677

FLASH FLOOD...RADAR INDICATED

$$

Dirkes

075 
WGUS54 KOHX 220409
FFWOHX
TNC015-149-187-220745-
/O.EXT.KOHX.FF.W.0038.000000T0000Z-260722T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
1109 PM CDT Tue Jul 21 2026

The National Weather Service in Nashville has extended the

* Flash Flood Warning for...
  Cannon County in middle Tennessee...
  Rutherford County in middle Tennessee...
  Williamson County in middle Tennessee...

* Until 245 AM CDT.

* At 1109 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 3.5 inches of 
  rain have fallen. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Murfreesboro, Franklin, Woodbury, Smyrna, Brentwood, La Vergne, 
  Spring Hill, Nolensville, Thompson's Station, Walterhill, 
  Fairview, Eagleville, Auburntown, Rockvale, Triune, Christiana, 
  Fosterville, Lascassas, Milton and Readyville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3585 8721 3597 8721 3605 8718 3605 8705
      3599 8704 3605 8693 3597 8661 3610 8652
      3596 8625 3596 8602 3583 8589 3573 8599
      3565 8600 3565 8609 3571 8622 3563 8625
      3566 8634 3562 8640 3570 8654 3570 8677

FLASH FLOOD...RADAR INDICATED

$$

Mueller

217 
WGUS74 KOHX 220738
FFSOHX

Flash Flood Statement
National Weather Service Nashville TN
238 AM CDT Wed Jul 22 2026

TNC015-149-187-220748-
/O.EXP.KOHX.FF.W.0038.000000T0000Z-260722T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cannon TN-Rutherford TN-Williamson TN-
238 AM CDT Wed Jul 22 2026

...FLASH FLOOD WARNING WILL EXPIRE AT 245 AM CDT EARLY THIS MORNING 
FOR CANNON, RUTHERFORD AND WILLIAMSON COUNTIES...

Flood waters have receded. The heavy rain has ended. Flooding is no 
longer expected to pose a threat. Please continue to heed remaining 
road closures.

A Flood Watch remains in effect until 700 AM CDT for a portion of 
Middle Tennessee.

&&

LAT...LON 3585 8721 3597 8721 3605 8718 3605 8705
      3599 8704 3605 8693 3597 8661 3610 8652
      3596 8625 3596 8602 3583 8589 3573 8599
      3565 8600 3565 8609 3571 8622 3563 8625
      3566 8634 3562 8640 3570 8654 3570 8677

$$

Dirkes

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 Nashville, TN wrote its last area forecast discussion before this flash flood warning went out at Jul 21, 7:45 PM CDT, 48 minutes earlier. Its key messages:

Updated at 738 PM CDT Tue Jul 21 2026
There is a slight risk (level 2/5) for severe weather through tonight. Main impacts are damaging winds and flash flooding.
Cooler and drier conditions arrive Wednesday and continue through the end of the week.

Area forecast discussion, Jul 21, 7:45 PM CDT, 48 minutes before

Area Forecast Discussion
National Weather Service Nashville TN
745 PM CDT Tue Jul 21 2026

...New UPDATE...

.KEY MESSAGES...
Updated at 738 PM CDT Tue Jul 21 2026

- There is a slight risk (level 2/5) for severe weather through
  tonight. Main impacts are damaging winds and flash flooding.

- Cooler and drier conditions arrive Wednesday and continue
  through the end of the week.

&&

.UPDATE...
Issued at 738 PM CDT Tue Jul 21 2026

Quick update for this evening revolves around current thunderstorms
now moving into our northern Middle TN counties. These storms
will continue to move southward over the next several hours and
present a damaging wind gust threat of 60+ mph and heavy rainfall
leading to flash flooding in several areas. While the tornado
threat has diminished, please don't sleep on these storms. Radar
is suggesting wind speeds capable of dropping large trees and
limbs which can cause plenty of damage -- as well as rainfall
rates on the order of 3 to 4 inches an hour. If you go under a
severe thunderstorm warning, please treat it as you would a
tornado warning and take proper shelter.

Storm threat should end by midnight leaving light to moderate rain
across our southern counties into the early morning hours. Flash
flood watch continues until 7 am for many of our mid-state
counties.

&&

.SHORT TERM...
(Rest of today through Wednesday Night)
Issued at 1113 AM CDT Tue Jul 21 2026

A surface front is moving south through Missouri into central
Illinois this morning ahead of a shortwave in the northwest upper
flow. The combination of lift and the ample instability and
moisture at the surface will allow storms to fire across southern
Indiana and Ohio over the next couple of hours. Some activity is
already bubbling across our northeastern counties and some heavy
downpours can't be ruled out this afternoon, but the main severe
concern will be with the activity coming out of Kentucky this
evening as bulk shear increases. Damaging winds will be the main
severe storm threat this evening and into early Wednesday along
with a very low risk of a tornado along the TN/KY state line.
Instability and storm organization will decrease the further
storms move south and the deeper we get into the overnight hours.
The window of greatest severe potential looks like 7 PM to around
1 AM.

In addition to the severe threat, some instances of flash flooding
will be a threat. PWAT values are around 1.9-2" across Middle
Tennessee, so very high rain rates can be expected with storms
today and tonight. HREF and associated CAMs show pockets of 2" of
rain with 90th percentile values showing the potential for over 4"
in isolated areas. With the wet July we've had so far, this would
be sufficient for flash flooding in those areas. The HREF shows
the higher probabilities of over 2" and higher 90th percentile
values along and east of I-65. A Flood Watch is in effect through
12z Wednesday.

By 12z Wednesday, the surface front will be draped across the area
from SW to NE. South of the surface front, additional showers and
storms will be possible Wednesday afternoon along the plateau.
Shear will be lower than tonight, so I don't expect any severe
activity Wednesday afternoon. Behind the front, lower dew points
will filter in from the northwest through the day and into
Wednesday night. The surface front will be through the entire area
by Wednesday night which will usher in a very pleasant night with
low dropping into the low to mid 60s.

&&

.LONG TERM...
(Thursday through next Tuesday)
Issued at 1113 AM CDT Tue Jul 21 2026

To start the long term period, we will be in the nicest airmass
we've had so far this summer. Dew points on Thursday will be in the
low to mid 60s with highs in the low to mid 80s. Friday will be
similar but a couple degrees warmer. A shortwave will ride northwest
upper flow and approach the area Friday night into Saturday which
will reintroduce some low to medium rain chances. Temperatures will
creep up over the weekend with the possibility of a couple more
shortwaves bringing additional storm storms chances going into early
next week. There is some uncertainty of how far east ridging
influences pushes which will affect our rain chances and
temperatures next week.

&&

.AVIATION...
(00Z TAFS)
Issued at 618 PM CDT Tue Jul 21 2026

The first 6 hours of this TAF cycle will be riddled with TS and
gusty winds as a broken line of thunderstorms moves into TN from
the north. These should come to an end for all terminals by 05-06Z
this evening and while cats will improve after the storms for
CKV/BNA/MQY, MVFR cigs will return around sunrise Wednesday at
BNA/MQY. CSV/SRB will bear the brunt of longer MVFR cigs through
the night and sticking around after storms until lunchtime on
Wednesday. Winds outside of storms will be light and we will see a
shift to the northwest/north after storms pass. With storms, winds
may be gusty at times with northwest to north gusts of 30 to 40
kts.

&&

.PRELIMINARY POINT TEMPS/POPS...
Nashville      73  87  65  83 /  80  10   0   0
Clarksville    70  86  62  83 /  50   0   0   0
Crossville     69  82  60  80 /  80  60  30  20
Columbia       73  88  65  84 /  80  20   0   0
Cookeville     71  84  63  81 /  80  30  10   0
Jamestown      69  82  60  80 /  90  40  10   0
Lawrenceburg   73  86  65  83 /  70  30  10  10
Murfreesboro   73  88  65  84 /  70  20   0   0
Waverly        71  86  63  83 /  70   0   0   0

&&

.OHX WATCHES/WARNINGS/ADVISORIES...

Flood Watch until 7 AM CDT Wednesday for TNZ008>011-024>034-
056>066-075-077-078-080-093>095.

&&

UPDATE.......Unger
SHORT TERM...Reagan
LONG TERM....Reagan
AVIATION.....Unger

In the hours before

Local storm report, Jul 21, 7:57 PM CDT, 36 minutes before

Preliminary Local Storm Report
National Weather Service Nashville TN
757 PM CDT Tue Jul 21 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0752 PM     Flash Flood      1 NNW White House       36.47N 86.67W
07/21/2026                   Robertson          TN   Emergency Mngr

            Several roads flooded in White House.

&&

SWU

Local storm report, Jul 21, 7:58 PM CDT, 35 minutes before

Preliminary Local Storm Report
National Weather Service Nashville TN
758 PM CDT Tue Jul 21 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0755 PM     Tstm Wnd Dmg     3 W Orlinda             36.60N 86.72W
07/21/2026                   Robertson          TN   Emergency Mngr

            Multiple trees down in Orlinda, Barren
            Plains and Cross Plains area.

&&

SWU

Local storm report, Jul 21, 8:08 PM CDT, 25 minutes before

Preliminary Local Storm Report
National Weather Service Nashville TN
808 PM CDT Tue Jul 21 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0804 PM     Flash Flood      Portland                36.59N 86.52W
07/21/2026                   Sumner             TN   Amateur Radio

            1.5 to 3 inches of water over the North
            Harris Road in Portland, TN.

&&

SWU

Local storm report, Jul 21, 8:12 PM CDT, 21 minutes before

Preliminary Local Storm Report
National Weather Service Nashville TN
812 PM CDT Tue Jul 21 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0811 PM     Flash Flood      Springfield             36.50N 86.88W
07/21/2026                   Robertson          TN   Trained Spotter

            2 inches in the last 30 minutes. Ditches and
            creeks full.

&&

SWU

Local storm report, Jul 21, 8:22 PM CDT, 11 minutes before

Preliminary Local Storm Report
National Weather Service Nashville TN
822 PM CDT Tue Jul 21 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0821 PM     Tstm Wnd Dmg     2 SSE Springfield       36.48N 86.87W
07/21/2026                   Robertson          TN   Emergency Mngr

            Tree on a house in Springfield.

&&

SWU

Local storm report, Jul 21, 8:33 PM CDT, 0 minutes before

Preliminary Local Storm Report
National Weather Service Nashville TN
833 PM CDT Tue Jul 21 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0832 PM     Flash Flood      Greenbrier              36.43N 86.81W
07/21/2026                   Robertson          TN   Emergency Mngr

            Roads flooded in Greenbrier.

&&

SWU

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 7:04 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Fentress, Jackson, Overton, Pickett	41 min
Jul 21, 7:08 PM CDT	Flash Flood Warning	OHX	Macon, Sumner	4 hr
Jul 21, 7:10 PM CDT	Severe Thunderstorm Warning	OHX	Montgomery, Robertson, Sumner	50 min
Jul 21, 7:14 PM CDT	Flash Flood Warning	OHX	Clay, Fentress, Jackson, Overton, Pickett	118 min
Jul 21, 7:16 PM CDT	Flash Flood Warning	OHX	Robertson	6 hr
Jul 21, 7:21 PM CDT	Severe Thunderstorm Warning	OHX	Houston, Montgomery, Stewart	39 min
Jul 21, 7:30 PM CDT	Flash Flood Warning	OHX	Sumner, Trousdale	6 hr
Jul 21, 7:37 PM CDT	Flash Flood Warning	OHX	Montgomery	3 hr
Jul 21, 7:38 PM CDT	Severe Thunderstorm Warning	OHX	Macon, Robertson, Sumner, Trousdale, Wilson	52 min
Jul 21, 7:46 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Robertson, Sumner, Wilson	44 min
Jul 21, 7:58 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OHX	Robertson, Sumner	32 min
Jul 21, 8:01 PM CDT	Flash Flood Warning	OHX	Davidson, Smith, Wilson	7 hr
Jul 21, 8:01 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Montgomery	29 min
Jul 21, 8:15 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Rutherford, Williamson, Wilson	60 min
Jul 21, 8:17 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OHX	Jackson, Macon, Putnam, Smith, Trousdale	43 min
Jul 21, 8:30 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Hickman, Houston, Montgomery and 1 more	45 min
Jul 21, 8:43 PM CDT	Tornado Warning	OHX	Dickson	47 min
Jul 21, 8:45 PM CDT	Flash Flood Warning Considerable damage threat	OHX	Davidson, Robertson, Sumner, Wilson	4 hr
Jul 21, 9:06 PM CDT	Flash Flood Warning	OHX	Cheatham	5 hr
Jul 21, 9:18 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Hickman, Humphreys	34 min
Jul 21, 9:26 PM CDT	Flash Flood Warning	OHX	Dickson, Hickman	6 hr
Jul 21, 9:30 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Hickman, Williamson	22 min
Jul 21, 10:43 PM CDT	Flash Flood Warning	OHX	Lewis, Maury, Perry	5 hr
Jul 21, 11:55 PM CDT	Flash Flood Warning Considerable damage threat	OHX	Maury	3 hr
Jul 22, 12:24 AM CDT	Flash Flood Warning	OHX	Giles, Lawrence, Wayne	4 hr
Jul 22, 12:49 AM CDT	Flash Flood Warning Considerable damage threat	OHX	Lewis, Perry	3 hr

Nearby

Flash Flood Warnings in Tennessee, 2026 Every flash flood warning in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.