Flash Flood Warning 71, NWS Nashville, TN

450 
WGUS74 KOHX 201259
FFSOHX

Flash Flood Statement
National Weather Service Nashville TN
759 AM CDT Thu Aug 20 2026

TNC125-201445-
/O.CON.KOHX.FF.W.0071.000000T0000Z-260820T1445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Montgomery TN-
759 AM CDT Thu Aug 20 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 AM CDT THIS
MORNING FOR NORTHERN MONTGOMERY COUNTY...

At 759 AM CDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1 and 2.5 inches of rain have
fallen. The expected rainfall rate is 1 inch in 1 hour. Additional
rainfall amounts up to 0.5 inches 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...
  Clarksville and Woodlawn.

This includes Interstate 24 between mile markers 1 and 17.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3646 8712 3648 8761 3664 8764 3664 8712
      3663 8712 3662 8713 3661 8712 3655 8714
      3655 8712 3652 8712 3652 8711 3651 8712
      3647 8713

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1 INCH IN 1 HOUR

$$

Dirkes

Area Forecast Discussion
National Weather Service Nashville TN
648 AM CDT Thu Aug 20 2026

...New AVIATION...

.KEY MESSAGES...
Updated at 642 AM CDT Thu Aug 20 2026

- There is a slight risk (level 2 out of 5) for severe storms
  early Thursday morning along and north of I-40. Damaging winds
  and heavy rain are the main concerns.

- A new marginal risk (level 1 out of 5) for severe storms is out
  for Thursday afternoon and evening mainly south of I-40 and
  along the Cumberland Plateau.

- Drier conditions with near normal temperatures are expected
  this weekend.

&&

.SHORT TERM...
(Tonight through Friday Night)
Issued at 1045 PM CDT Wed Aug 19 2026

Short range models have been a complete mess handling upstream
storms over MO and this has complicated our storm forecast for
tonight. Latest trends bring storms in later than our previous
forecast, perhaps as late as 2 or 3 AM CDT in our northwest. How
far south storms develop is also a bit uncertain, but even if the
main MCS tracks up in KY, it should still push some outflow storms
down into the Mid State. Our far southern counties may not see
any rain through the night.

A severe risk continues with the storms, mainly damaging wind gusts.
A brief tornado cannot be fully ruled out, but storms should be
outflow dominant with relatively stable boundary conditions here
compared to upstream areas. Local heavy rain will be a concern,
mainly in the northwest.

Pockets of showers and storms will linger into the morning as a
diffuse frontal zone approaches the area. Much of midday will be
rain-free. Then, after the atmosphere recovers, additional
scattered storms will form along the weak frontal zone as another
impulse crosses the area. This time the greatest severe storm and
heavy rain potential will be located across our southern and
Plateau counties. Local damaging wind gusts will be the concern
in the afternoon as capes climb above 2000 with dcape values over
1k.

Some additional shortwave energy will cross the area Thursday and
Friday with a low chance for more showers and storms, mainly south
and Plateau.

&&

.LONG TERM...
(Saturday through next Thursday)
Issued at 1045 PM CDT Wed Aug 19 2026

Slightly less humid air will move in with temperatures staying
around normal through the weekend and into early next week. Rain
chances look very low for the weekend. The upper high will push
eastward early next week which means temperatures and humidity
will start to creep up toward mid next week.

&&

.AVIATION...
(12Z TAFS)
Issued at 642 AM CDT Thu Aug 20 2026

A complex of thunderstorms is moving across Middle Tennessee this
morning and TS is ongoing at BNA, MQY, and CKV. There are still a
few more intense storm cores in the region of these airfields as
well, so MVFR conditions are possible through ~14z along with
variable wind directions. SRB and CSV are on the weaker side of
the system, so only -RA for the next few hours. Convection is
expected to clear out by ~15z at all sites and a VFR day is
forecast with light W to SW winds. Maintaining PROB30s for BNA,
MQY, SRB, and CSV for afternoon/evening storm potential.

Outside of convection, guidance is suggestive of fog development
tonight at all sites, then a transition to MVFR cigs by daybreak
tomorrow. Likely this remains more patchy near BNA and MQY. I went
more aggressive with vis at SRB and CSV and there's better
chances for IFR vis/cig at these airfields overnight into
tomorrow morning.

&&

.PRELIMINARY POINT TEMPS/POPS...
Nashville      91  69  90  65 /  40  30  10   0
Clarksville    89  70  89  66 /  50  10   0   0
Crossville     86  66  84  63 /  50  30  30   0
Columbia       93  70  91  67 /  40  30   0   0
Cookeville     86  68  85  65 /  60  30  20   0
Jamestown      85  67  84  64 /  60  40  30   0
Lawrenceburg   92  69  89  66 /  40  30  10   0
Murfreesboro   93  70  91  67 /  40  40  10   0
Waverly        90  70  89  67 /  30  10   0   0

&&

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

SHORT TERM...13
LONG TERM....13
AVIATION.....Sizemore

Special Weather Statement
National Weather Service Nashville TN
253 AM CDT Thu Aug 20 2026

TNZ007-008-200830-
Robertson TN-Sumner TN-
253 AM CDT Thu Aug 20 2026

...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN SUMNER AND
NORTHEASTERN ROBERTSON COUNTIES THROUGH 330 AM CDT...

At 253 AM CDT, Doppler radar was tracking a strong thunderstorm near
Cross Plains, or 12 miles northeast of Springfield, moving southeast
at 35 mph.

HAZARD...Wind gusts up to 50 mph and nickel 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...
Gallatin, White House, Cross Plains, Portland, Orlinda,
Mitchellville, Cottontown, and Black Jack.

This includes Interstate 65 between mile markers 109 and 121.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

A Severe Thunderstorm Watch remains in effect until 600 AM CDT for
Middle Tennessee.

&&

LAT...LON 3665 8638 3638 8650 3654 8681 3665 8677
      3665 8659 3663 8656 3664 8655 3664 8654
      3665 8651
TIME...MOT...LOC 0753Z 295DEG 29KT 3659 8669

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 MPH

Holley

Special Weather Statement
National Weather Service Nashville TN
317 AM CDT Thu Aug 20 2026

TNZ026-027-059-200845-
Williamson TN-Davidson TN-Cheatham TN-
317 AM CDT Thu Aug 20 2026

...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN DAVIDSON...
WILLIAMSON AND SOUTH CENTRAL CHEATHAM COUNTIES THROUGH 345 AM CDT...

At 317 AM CDT, Doppler radar was tracking a strong thunderstorm near
Fairview, or 12 miles west of Franklin, moving east at 45 mph.

HAZARD...Wind gusts up to 50 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...
Franklin, Brentwood, Spring Hill, Forest Hills, Oak Hill, Belle
Meade, Kingston Springs, Thompson's Station, Pegram, Bellevue,
Fairview, Natchez Trace At Highway 96, and Leipers Fork.

This includes the following highways...
 Interstate 40 between mile markers 188 and 198.
 Interstate 65 between mile markers 55 and 78.
 Interstate 24 near mile marker 57.
 Interstate 840 between mile markers 10 and 17, and between mile
markers 22 and 34.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

A Severe Thunderstorm Watch remains in effect until 600 AM CDT for
Middle Tennessee.

&&

LAT...LON 3588 8718 3611 8709 3608 8668 3574 8680
TIME...MOT...LOC 0817Z 282DEG 41KT 3598 8705

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

Holley

Special Weather Statement
National Weather Service Nashville TN
602 AM CDT Thu Aug 20 2026

TNZ024-056>060-201145-
Hickman TN-Williamson TN-Lewis TN-Humphreys TN-Maury TN-Perry TN-
602 AM CDT Thu Aug 20 2026

...STRONG THUNDERSTORMS WILL IMPACT NORTHERN LEWIS...NORTHWESTERN
MAURY...WEST CENTRAL WILLIAMSON...PERRY...SOUTHERN HUMPHREYS AND
HICKMAN COUNTIES THROUGH 645 AM CDT...

At 602 AM CDT, Doppler radar was tracking a cluster of strong
thunderstorms along a line extending from 11 miles southwest of
Fairview to near Centerville to 12 miles north of Linden. Movement
was east at 35 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...
Columbia, Centerville, Linden, Lobelville, Bon Aqua, Kimmins, Primm
Springs, Lyles, I-40 Near The Tennessee River, Bucksnort, Santa Fe,
Mousetail Landing State Park, Pinewood, Pleasantville, Williamsport,
and Nunnelly.

This includes the following highways...
 Interstate 40 between mile markers 136 and 158.
 Interstate 840 between mile markers 5 and 12.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3566 8802 3572 8804 3577 8798 3593 8792
      3597 8731 3596 8728 3596 8720 3597 8721
      3598 8715 3561 8704 3557 8799 3558 8801
      3562 8804
TIME...MOT...LOC 1102Z 272DEG 30KT 3588 8728 3579 8755 3578 8790

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

Dirkes

Special Weather Statement
National Weather Service Nashville TN
611 AM CDT Thu Aug 20 2026

TNZ006-007-201145-
Robertson TN-Montgomery TN-
611 AM CDT Thu Aug 20 2026

...A STRONG THUNDERSTORM WILL IMPACT MONTGOMERY AND NORTHWESTERN
ROBERTSON COUNTIES THROUGH 645 AM CDT...

At 610 AM CDT, Doppler radar was tracking a strong thunderstorm over
Oak Grove, moving southeast at 45 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

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

Locations impacted include...
Clarksville, Springfield, Adams, Cedar Hill, Cunningham, and
Woodlawn.

This includes Interstate 24 between mile markers 1 and 20.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3664 8700 3658 8680 3644 8709 3645 8712
      3645 8715 3642 8715 3643 8717 3636 8726
      3632 8736 3664 8760
TIME...MOT...LOC 1110Z 304DEG 39KT 3666 8740

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

Dirkes