Alert archive / Tennessee / Flash Flood Warnings in 2026

Flash Flood Warning 76, NWS Nashville, TN

September 21, 2026Jackson County, Overton County, Tennessee

NWS Nashville, TN issued this flash flood warning at Sep 21, 2026, 9:42 PM CDT for Jackson County, Overton 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 outline as issued.

The facts

Issued: Sep 21, 2026, 9:42 PM CDT (02:42 UTC)
Expired: Sep 22, 2026, 12:30 AM CDT
In force: 3 hr
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Flood severity: None

Counties Jackson County, TN, Overton County, TN

The radar

The Nashville radar (KOHX), 100 km from the middle of the area, began a volume at 02:44 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

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, 2.7 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.

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: 734 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 2090 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: -32 m²/s²
0-3 km storm-relative helicity: 38 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

045 
WGUS54 KOHX 220242
FFWOHX
TNC087-133-220530-
/O.NEW.KOHX.FF.W.0076.260922T0242Z-260922T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
942 PM CDT Mon Sep 21 2026

The National Weather Service in Nashville has issued a

* Flash Flood Warning for...
  Southeastern Jackson County in Middle Tennessee...
  Central Overton County in Middle Tennessee...

* Until 1230 AM CDT.

* At 942 PM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Between 1 and 2 inches of rain
  have fallen. The expected rainfall rate is 1 to 2 inches in 1 hour.
  Additional rainfall amounts up to 1 inch are possible in the warned
  area. Flash flooding is ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar indicated.

  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...
  Livingston and Cummins Falls State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 3624 8553 3623 8560 3635 8557 3652 8523
      3647 8516 3640 8517 3627 8545 3628 8547
      3628 8545 3630 8547 3630 8550 3629 8549
      3628 8549 3628 8551 3626 8551 3626 8553

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR

$$

Sizemore

1 follow-up statement

063 
WGUS74 KOHX 220521
FFSOHX

Flash Flood Statement
National Weather Service Nashville TN
1221 AM CDT Tue Sep 22 2026

TNC087-133-220531-
/O.EXP.KOHX.FF.W.0076.000000T0000Z-260922T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Jackson TN-Overton TN-
1221 AM CDT Tue Sep 22 2026

...FLASH FLOOD WARNING WILL EXPIRE AT 1230 AM CDT EARLY THIS MORNING
FOR SOUTHEASTERN JACKSON AND CENTRAL OVERTON COUNTIES...

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

&&

LAT...LON 3635 8557 3652 8523 3647 8516 3640 8517
      3627 8545 3628 8547 3628 8545 3630 8547
      3630 8550 3629 8549 3628 8549 3628 8551
      3626 8551 3626 8553 3624 8553 3623 8560

$$

Clements

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 Sep 21, 6:33 PM CDT, 3 hours 9 minutes earlier. Its key messages:

Updated at 625 PM CDT Mon Sep 21 2026
Low chance of severe weather this evening across Middle TN. Damaging winds are the primary threat.
Major heat relief is on the way with temperatures falling to near normal levels by Wednesday.

Area forecast discussion, Sep 21, 6:33 PM CDT, 3 hours 9 minutes before

Area Forecast Discussion
National Weather Service Nashville TN
633 PM CDT Mon Sep 21 2026

...New AVIATION...

.KEY MESSAGES...
Updated at 625 PM CDT Mon Sep 21 2026

- Low chance of severe weather this evening across Middle TN.
  Damaging winds are the primary threat.

- Major heat relief is on the way with temperatures falling to near
  normal levels by Wednesday.

&&

.SHORT TERM...
(Rest of today through Tuesday)
Issued at 1112 AM CDT Mon Sep 21 2026

A stationary front that has been draped across the TN Valley for
several days will finally get a move on today. Expect a
reinvigoration of convective activity along the front this
afternoon and evening aided by peak heating. CAMs are painting a
pretty sporadic picture in terms of spatial coverage of storms
today. The boundary is oriented SW-NE across TN but storms will be
pretty scattered across the state. Forecast soundings suggest
DCAPE on the order of 1000 J/kg, which is plenty to produce a few
strong downbursts up to 60 MPH. Shear is pretty lacking, so don't
expect any multicellular convection or organized updrafts. They'll
most likely be single celled microbursts like we see in the
summertime.

The front won't make it through Middle TN until Tuesday, so PoPs
are still in the 40-60% range through Tuesday morning. The
wonderful news is that things will FINALLY cool down for a
meaningful period behind this front. Tuesday is kind of our
transition day as rain cools the region and the cooler, drier air
behind the boundary starts to build in. Highs finally drop below
90 degrees on Tuesday afternoon for the first time in several
weeks.

&&

.LONG TERM...
(Tuesday Night through next Monday)
Issued at 1112 AM CDT Mon Sep 21 2026

Wednesday begins our first true taste of fall. Cool, dry air will
send temperatures much closer to normal in the low 80s for the
rest of the work week. With high pressure in place to promote
radiational cooling and resultant CAA, overnight lows continue to
cool and will drop into the 50s by Saturday. PoPs remain below
15% through the weekend but start to creep back up early next
week.

&&

.AVIATION...
(00Z TAFS)
Issued at 625 PM CDT Mon Sep 21 2026

A frontal zone moving in from the northwest will create isolated
showers and storms this evening with PROB30 groups in area
terminal forecasts. Otherwise, VFR conditions this evening will
drop to mainly MVFR overnight as lower cigs form. CSV and SRB will
drop to LIFR at times with dense fog and stratus. Conditions will
improve to VFR by 16Z Wednesday. Winds will be mainly N to NE
5-10KT through the period.

&&

.PRELIMINARY POINT TEMPS/POPS...
Nashville      68  87  65  83 /  40  20   0   0
Clarksville    67  85  63  82 /  10  10   0   0
Crossville     64  82  61  77 /  50  60  20  50
Columbia       68  90  65  86 /  30  30   0   0
Cookeville     66  83  63  78 /  50  40  10  30
Jamestown      65  81  62  76 /  60  50  20  40
Lawrenceburg   67  89  64  84 /  50  40  10  10
Murfreesboro   68  89  65  85 /  40  30  10  10
Waverly        68  85  64  81 /  20  10   0   0

&&

.OHX WATCHES/WARNINGS/ADVISORIES...
None.
&&

SHORT TERM...Dirkes
LONG TERM....Dirkes
AVIATION.....13

In the hours before

Local storm report, Sep 21, 6:02 PM CDT, 3 hours 40 minutes before

Preliminary Local Storm Report
National Weather Service Nashville TN
602 PM CDT Mon Sep 21 2026

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

0518 PM     Hail             4 SE Lawrenceburg       35.20N 87.28W
09/21/2026  E0.70 Inch       Lawrence           TN   Emergency Mngr

            Hail up to dime size near US 64 and Wesley
            Chapel Rd and Marable Rd.

&&

AS

Local storm report, Sep 21, 6:04 PM CDT, 3 hours 38 minutes before

Preliminary Local Storm Report
National Weather Service Nashville TN
604 PM CDT Mon Sep 21 2026

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

0521 PM     Tstm Wnd Dmg     5 SE Lawrenceburg       35.19N 87.28W
09/21/2026                   Lawrence           TN   Emergency Mngr

            Numerous trees reported down along with
            utility lines, southeast portion of
            Lawrenceburg.

&&

AS

Special weather statement, Sep 21, 6:09 PM CDT, 3 hours 33 minutes before

Special Weather Statement
National Weather Service Nashville TN
609 PM CDT Mon Sep 21 2026

TNZ095-212345-
Giles TN-
609 PM CDT Mon Sep 21 2026

...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN GILES COUNTY
THROUGH 645 PM CDT...

At 609 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles south of Pulaski, moving southeast at 20 mph.

HAZARD...Wind gusts up to 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Pulaski, Ardmore, Elkton, and Prospect.

This includes Interstate 65 between mile markers 1 and 12.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3500 8718 3521 8704 3516 8683 3499 8684
TIME...MOT...LOC 2309Z 297DEG 16KT 3509 8699

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

40/Sizemore

Special weather statement, Sep 21, 7:46 PM CDT, 1 hour 56 minutes before

Special Weather Statement
National Weather Service Nashville TN
746 PM CDT Mon Sep 21 2026

TNZ011-220115-
Pickett TN-
746 PM CDT Mon Sep 21 2026

...A STRONG THUNDERSTORM WILL IMPACT NORTHEASTERN PICKETT COUNTY
THROUGH 815 PM CDT...

At 746 PM CDT, Doppler radar was tracking a strong thunderstorm over
Mount Pisgah, or 12 miles south of Monticello, moving southeast at 15
mph.

HAZARD...Wind gusts up to 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Pickett State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3652 8478 3654 8481 3655 8482 3656 8484
      3660 8493 3661 8494 3660 8479 3653 8473
TIME...MOT...LOC 0046Z 294DEG 14KT 3666 8481

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

40/Sizemore

Special weather statement, Sep 21, 8:10 PM CDT, 1 hour 32 minutes before

Special Weather Statement
National Weather Service Nashville TN
810 PM CDT Mon Sep 21 2026

TNZ032-065-220200-
Putnam TN-White TN-
810 PM CDT Mon Sep 21 2026

...A STRONG THUNDERSTORM WILL IMPACT NORTH CENTRAL WHITE AND WESTERN
PUTNAM COUNTIES THROUGH 900 PM CDT...

At 810 PM CDT, Doppler radar was tracking a strong thunderstorm over
Baxter, or 9 miles west of Cookeville, moving east at 15 mph.

HAZARD...Wind gusts up to 40 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Cookeville, Baxter, Burgess Falls State Park, and Hamptons
Crossroads.

This includes Interstate 40 between mile markers 271 and 289.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3625 8546 3602 8547 3606 8569 3608 8572
      3607 8574 3608 8577 3622 8573 3623 8567
      3622 8566 3622 8564 3621 8563 3623 8559
      3623 8558 3622 8557 3624 8554
TIME...MOT...LOC 0110Z 273DEG 13KT 3614 8567

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

40/Sizemore

Special weather statement, Sep 21, 8:43 PM CDT, 59 minutes before

Special Weather Statement
National Weather Service Nashville TN
843 PM CDT Mon Sep 21 2026

TNZ032>034-220230-
Putnam TN-Fentress TN-Overton TN-
843 PM CDT Mon Sep 21 2026

...A STRONG THUNDERSTORM WILL IMPACT OVERTON...NORTHEASTERN PUTNAM
AND SOUTHWESTERN FENTRESS COUNTIES THROUGH 930 PM CDT...

At 843 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles southeast of Livingston, moving east at 15 mph.

HAZARD...Wind gusts up to 40 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Cookeville, Livingston, Algood, Monterey, Crawford, and Rickman.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3641 8513 3641 8508 3632 8501 3614 8510
      3618 8557 3623 8555 3624 8553 3626 8553
      3626 8551 3627 8551 3629 8549 3637 8550
      3640 8548 3644 8515
TIME...MOT...LOC 0143Z 274DEG 13KT 3630 8525

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

40/Sizemore

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 21, 7:46 PM CDT	Special Weather Statement	OHX	Pickett	29 min
Sep 21, 8:10 PM CDT	Special Weather Statement	OHX	Putnam	50 min
Sep 21, 8:41 PM CDT	Severe Thunderstorm Warning	OHX	Putnam, White	31 min
Sep 21, 8:43 PM CDT	Special Weather Statement	OHX	Overton	47 min
Sep 21, 9:19 PM CDT	Flash Flood Warning	OHX	Cumberland	5 hr
Sep 21, 9:50 PM CDT	Special Weather Statement	OHX	Cannon	25 min
Sep 21, 11:25 PM CDT	Special Weather Statement	OHX	Cumberland	50 min
Sep 22, 2:11 AM CDT	Special Weather Statement	OHX	Cumberland	49 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.