Flash Flood Warning 63, NWS Nashville, TN

Area Forecast Discussion
National Weather Service Nashville TN
1224 PM CDT Sat Aug 8 2026

...New AVIATION...

.KEY MESSAGES...
Updated at 1221 PM CDT Sat Aug 8 2026

- Scattered afternoon and early evening showers and storms will
  form each day. Heavy downpours with local flash flooding will
  be the main concern.

- A few of the stronger storms may produce wind gusts of 40 to 50
  mph and frequent lightning. This could bring down a few limbs
  and cause scattered power outages. Widespread severe storms are
  not expected at this time.

- Heat index values will reach the upper 90s to low 100s each
  day. Some areas could have heat index values topping 105 at
  times next week.

&&

.SHORT TERM...
(Rest of today through Sunday)
Issued at 1120 AM CDT Sat Aug 8 2026

It will be another hot, humid, and unsettled day with scattered
showers and storms. Over the past few days, our northwest
counties have not seen any storms, but today will be different. We
expect storms to be scattered across the entire area (40 to 60
percent chances) as a disturbance comes in from the west, working
with already unstable and humid conditions in place. The storm
parameters are very similar to the past several days. Not
everybody will get rain, but some of us will get too much in a
short period of time resulting in small pockets of flash flooding.
The stronger storms will contain 40 to 50 mph gusts and frequent
lightning. In summer storms, it is not uncommon to see a few
falling limbs and scattered power outages. Storms will pop up
quickly, so if you are outdoors and skies darken, it would be a
good idea to move to shelter quickly.

Storms will taper off this evening, but thanks to some energy from
the disturbance, maybe not quite as quickly as the past couple of
evenings. Areas that receive rain are likely to have late night
fog.

Coverage of storms will be a little less Sunday (20 to 50 percent),
but overall still the same scenario with pockets of local
flooding and gusty winds where storms occur.

&&

.LONG TERM...
(Sunday Night through next Saturday)
Issued at 1120 AM CDT Sat Aug 8 2026

Heading into Monday and Tuesday, upper level ridging will become
a little stronger as the big, hot ridge from out west bridges
across to the persistent Bermuda high. This will bump temperatures
up a little while slightly reducing shower and storm coverage (10
percent northwest to 40 percent southeast). Heat index values
look marginal for heat headlines, but caution is advised with Heat
Risk levels reaching level 3 out of 4 (Major) for most areas.
Heat headlines may be issued for some areas west of the Plateau
over the next couple of days if forecast data trend hotter.

Going through the week, it will stay hot and humid with daily
chances for showers and storms. There are some important model
differences that could impact the forecast late week. Looking at
LREF clustering data, we see big differences emerging between the
GFS and ECMWF groups. The GFS is trending toward a broad eastern
trough with the potential for increased storminess and less heat while
the ECMWF camp is building up the ridge across the southern
states and TN Valley. This would mean lower storm chances and
hotter conditions with temps well into the 90s. Time will tell,
but neither scenario would be terribly out of line for August.

&&

.AVIATION...
(18Z TAFS)
Issued at 1221 PM CDT Sat Aug 8 2026

Convective cells are already developing across Middle Tennessee
and are expected to become more widespread as the afternoon
progresses. We've got TS/CBs in all the terminals during the peak-
heating period. Overnight, radiation fog is likely to be more
predominant, so we've got most of the terminals going down to
MVFR, except IFR at KCSV.

&&

.PRELIMINARY POINT TEMPS/POPS...
Nashville      73  91  74  93 /  30  30  10  20
Clarksville    72  91  73  94 /  30  10   0  10
Crossville     67  85  68  86 /  20  60  20  50
Columbia       71  90  72  92 /  20  40  20  40
Cookeville     70  86  70  88 /  20  50  10  40
Jamestown      68  86  69  87 /  20  40  10  40
Lawrenceburg   70  88  71  90 /  30  50  20  40
Murfreesboro   72  90  72  92 /  20  40  20  30
Waverly        72  90  72  92 /  30  20  10  10

&&

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

SHORT TERM...13
LONG TERM....13
AVIATION.....Rose

Special Weather Statement
National Weather Service Nashville TN
157 PM CDT Sat Aug 8 2026

TNZ007-008-081945-
Robertson TN-Sumner TN-
157 PM CDT Sat Aug 8 2026

...A STRONG THUNDERSTORM WILL IMPACT SUMNER AND EASTERN ROBERTSON
COUNTIES THROUGH 245 PM CDT...

At 157 PM CDT, Doppler radar was tracking a strong thunderstorm over
Portland, or 11 miles north of Gallatin, moving south at 15 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...
Gallatin, White House, Millersville, Ridgetop, Cross Plains,
Portland, Orlinda, Mitchellville, Cottontown, Bethpage, Oak Grove,
and Black Jack.

This includes Interstate 65 between mile markers 103 and 120.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3665 8635 3664 8629 3645 8625 3645 8627
      3638 8627 3640 8675 3641 8675 3640 8677
      3665 8661 3665 8659 3663 8657 3664 8655
      3664 8654 3665 8651
TIME...MOT...LOC 1857Z 003DEG 14KT 3654 8651

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

Barnwell

Special Weather Statement
National Weather Service Nashville TN
236 PM CDT Sat Aug 8 2026

TNZ006-007-082015-
Robertson TN-Montgomery TN-
236 PM CDT Sat Aug 8 2026

...STRONG THUNDERSTORMS WILL IMPACT NORTHEASTERN MONTGOMERY AND
ROBERTSON COUNTIES THROUGH 315 PM CDT...

At 235 PM CDT, Doppler radar was tracking a cluster of strong
thunderstorms near Springfield, moving east at 15 mph.

HAZARD...Wind gusts up to 50 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...
Clarksville, Springfield, White House, Millersville, Greenbrier,
Coopertown, Ridgetop, Cross Plains, Guthrie, Orlinda, Adams, and
Cedar Hill.

This includes the following highways...
 Interstate 65 between mile markers 105 and 106.
 Interstate 24 between mile markers 1 and 21.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3641 8670 3642 8675 3640 8677 3643 8709
      3645 8712 3644 8715 3647 8740 3664 8737
      3665 8666
TIME...MOT...LOC 1935Z 272DEG 12KT 3657 8696

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH

Barnwell

Special Weather Statement
National Weather Service Nashville TN
251 PM CDT Sat Aug 8 2026

TNZ008-027-028-082030-
Davidson TN-Wilson TN-Sumner TN-
251 PM CDT Sat Aug 8 2026

...STRONG THUNDERSTORMS WILL IMPACT NORTHEASTERN DAVIDSON...
SOUTHWESTERN SUMNER AND NORTHWESTERN WILSON COUNTIES THROUGH 330 PM
CDT...

At 251 PM CDT, Doppler radar was tracking a cluster of strong
thunderstorms over Old Hickory, or 7 miles northeast of Nashville,
moving east at 10 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...
Gallatin, Nashville, Madison, Hendersonville, Mount Juliet,
Goodlettsville, Millersville, Lakewood, Hermitage, Rural Hill,
Belinda City, Old Hickory, Berry Hill, Green Hill, and Percy Priest
Lake.

This includes the following highways...
 Interstate 40 between mile markers 207 and 229.
 Interstate 65 between mile markers 81 and 101.
 Interstate 24 between mile markers 42 and 53.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3612 8683 3638 8676 3641 8645 3610 8644
TIME...MOT...LOC 1951Z 258DEG 7KT 3624 8668

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

Barnwell

Special Weather Statement
National Weather Service Nashville TN
257 PM CDT Sat Aug 8 2026

TNZ009-082045-
Macon TN-
257 PM CDT Sat Aug 8 2026

...A STRONG THUNDERSTORM WILL IMPACT MACON COUNTY THROUGH 345 PM
CDT...

At 256 PM CDT, Doppler radar was tracking a strong thunderstorm near
Lafayette, moving southeast at 10 mph.

HAZARD...Wind gusts up to 50 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...
Lafayette and Red Boiling Springs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3662 8579 3661 8580 3649 8581 3647 8582
      3653 8622 3664 8620
TIME...MOT...LOC 1956Z 333DEG 9KT 3659 8601

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH

Barnwell

Special Weather Statement
National Weather Service Nashville TN
313 PM CDT Sat Aug 8 2026

TNZ007-008-082100-
Robertson TN-Sumner TN-
313 PM CDT Sat Aug 8 2026

...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN SUMNER AND
ROBERTSON COUNTIES THROUGH 400 PM CDT...

At 313 PM CDT, Doppler radar was tracking a strong thunderstorm near
Cross Plains, or near Springfield, moving south at 10 mph.

HAZARD...Wind gusts up to 50 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...
Gallatin, Springfield, White House, Millersville, Greenbrier,
Coopertown, Ridgetop, Cross Plains, Portland, Pleasant View, Orlinda,
Cedar Hill, Cottontown, and Black Jack.

This includes the following highways...
 Interstate 65 between mile markers 102 and 121.
 Interstate 24 between mile markers 26 and 28.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3663 8656 3664 8655 3641 8641 3638 8673
      3641 8675 3638 8678 3637 8685 3638 8686
      3637 8688 3639 8689 3639 8691 3638 8696
      3637 8697 3637 8699 3640 8702 3664 8703
      3665 8659
TIME...MOT...LOC 2013Z 344DEG 7KT 3654 8677

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH

Barnwell

Special Weather Statement
National Weather Service Nashville TN
335 PM CDT Sat Aug 8 2026

TNZ056>058-060-094-082115-
Hickman TN-Lawrence TN-Lewis TN-Maury TN-Perry TN-
335 PM CDT Sat Aug 8 2026

...STRONG THUNDERSTORMS WILL IMPACT LEWIS...NORTHEASTERN LAWRENCE...
SOUTHWESTERN MAURY...EAST CENTRAL PERRY AND HICKMAN COUNTIES THROUGH
415 PM CDT...

At 334 PM CDT, Doppler radar was tracking a cluster of strong
thunderstorms over Hohenwald, moving northeast at 20 mph.

HAZARD...Wind gusts up to 50 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, Hohenwald, Centerville, Mount Pleasant, Summertown,
Gordonsburg, Kimmins, Henryville, Pleasantville, Hampshire,
Williamsport, and Nunnelly.

This includes Interstate 65 between mile markers 41 and 43.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3537 8739 3556 8778 3592 8759 3559 8685
TIME...MOT...LOC 2034Z 220DEG 16KT 3557 8752

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH

Barnwell