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Gallatin, Tennessee 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Gallatin TN
National Weather Service Forecast for: Gallatin TN
Issued by: National Weather Service Nashville, TN
Updated: 12:31 pm CDT Aug 12, 2025
 
This
Afternoon
This Afternoon: Showers and thunderstorms likely, mainly between 3pm and 4pm.  Partly sunny, with a high near 91. Heat index values as high as 99. South wind around 5 mph.  Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
T-storms
Likely

Tonight

Tonight: A 40 percent chance of showers and thunderstorms, mainly after 3am.  Mostly cloudy, with a low around 73. South wind around 5 mph becoming calm  in the evening.
Chance
T-storms

Wednesday

Wednesday: Showers and thunderstorms likely, mainly after 4pm.  Partly sunny, with a high near 91. Heat index values as high as 98. South wind around 5 mph becoming northwest in the afternoon.  Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Chance
T-storms then
T-storms
Likely
Wednesday
Night
Wednesday Night: Showers and thunderstorms likely, mainly before 7pm.  Patchy fog before 2am, then patchy fog after 3am.  Otherwise, mostly cloudy, with a low around 71. Calm wind.  Chance of precipitation is 60%.
T-storms
Likely and
Patchy Fog
Thursday

Thursday: A 30 percent chance of showers and thunderstorms, mainly after 1pm.  Patchy fog before 9am.  Otherwise, partly sunny, with a high near 91. Calm wind becoming northwest around 5 mph in the afternoon.
Chance
T-storms and
Patchy Fog
Thursday
Night
Thursday Night: Patchy fog before 4am, then patchy fog after 5am.  Otherwise, partly cloudy, with a low around 71. Calm wind.
Partly Cloudy
then Patchy
Fog
Friday

Friday: Sunny, with a high near 94. Calm wind becoming north around 5 mph.
Sunny

Friday
Night
Friday Night: Mostly clear, with a low around 72. Calm wind.
Mostly Clear

Saturday

Saturday: Sunny, with a high near 96. Calm wind becoming north around 5 mph.
Sunny

Hi 91 °F Lo 73 °F Hi 91 °F Lo 71 °F Hi 91 °F Lo 71 °F Hi 94 °F Lo 72 °F Hi 96 °F

 

This Afternoon
 
Showers and thunderstorms likely, mainly between 3pm and 4pm. Partly sunny, with a high near 91. Heat index values as high as 99. South wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
 
A 40 percent chance of showers and thunderstorms, mainly after 3am. Mostly cloudy, with a low around 73. South wind around 5 mph becoming calm in the evening.
Wednesday
 
Showers and thunderstorms likely, mainly after 4pm. Partly sunny, with a high near 91. Heat index values as high as 98. South wind around 5 mph becoming northwest in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
 
Showers and thunderstorms likely, mainly before 7pm. Patchy fog before 2am, then patchy fog after 3am. Otherwise, mostly cloudy, with a low around 71. Calm wind. Chance of precipitation is 60%.
Thursday
 
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 91. Calm wind becoming northwest around 5 mph in the afternoon.
Thursday Night
 
Patchy fog before 4am, then patchy fog after 5am. Otherwise, partly cloudy, with a low around 71. Calm wind.
Friday
 
Sunny, with a high near 94. Calm wind becoming north around 5 mph.
Friday Night
 
Mostly clear, with a low around 72. Calm wind.
Saturday
 
Sunny, with a high near 96. Calm wind becoming north around 5 mph.
Saturday Night
 
Mostly clear, with a low around 73.
Sunday
 
Sunny and hot, with a high near 97.
Sunday Night
 
Mostly clear, with a low around 74.
Monday
 
Sunny and hot, with a high near 98.

 

Forecast from NOAA-NWS for Gallatin TN.

Weather Forecast Discussion
335
FXUS64 KOHX 121737
AFDOHX

Area Forecast Discussion
National Weather Service Nashville TN
1237 PM CDT Tue Aug 12 2025

...New AVIATION...

.KEY MESSAGES...
Updated at 1233 PM CDT Tue Aug 12 2025

- Medium to high rain chances (50 - 80%) through Thursday, with
  the wettest day looking to be Wednesday. No severe weather is
  expected.

- Heat returns this weekend, with high temperatures in the mid to
  upper 90s. Heat indices will get into the low triple digits, but
  are expected to stay below advisory criteria.&&

.SHORT TERM...
(This afternoon through Wednesday Night)
Issued at 1220 PM CDT Tue Aug 12 2025

Showers continue to blossom on radar this morning, with puffy clouds
overtaking the skies on satellite. Some guidance is picking up on
the showers becoming more widespread like they are, but others are
struggling. Today, the rain chances will be highest south of I-40
and east of I-24, with our lowest rain chances being around the land
between the lakes. Heading into Wednesday, everyone has a 50/50 shot
of seeing at least some rain, with most likely places being south of
I-40 and east of I-65. This air mass is incredibly moist, with PWATs
around 2 inches on this morning`s 12z sounding. Guidance shows PWATs
right around 2" to 2.2" through Wednesday night, when a front begins
to push south out of the midwest and dry us out a bit. With that
amount of moisture though, heavy rainfall cannot be ruled out from
any showers or thunderstorms that develop and take advantage of
that. Severe weather is not expected with these precipitation
chances, and frequent lightning and heavy rainfall are the biggest
threats through mid-week.

&&

.SHORT TERM...
(This afternoon through Wednesday Night)
Issued at 1220 PM CDT Tue Aug 12 2025

Showers continue to blossom on radar this morning, with puffy clouds
overtaking the skies on satellite. Some guidance is picking up on
the showers becoming more widespread like they are, but others are
struggling. Today, the rain chances will be highest south of I-40
and east of I-24, with our lowest rain chances being around the land
between the lakes. Heading into Wednesday, everyone has a 50/50 shot
of seeing at least some rain, with most likely places being south of
I-40 and east of I-65. This air mass is incredibly moist, with PWATs
around 2 inches on this morning`s 12z sounding. Guidance shows PWATs
right around 2" to 2.2" through Wednesday night, when a front begins
to push south out of the midwest and dry us out a bit. With that
amount of moisture though, heavy rainfall cannot be ruled out from
any showers or thunderstorms that develop and take advantage of
that. Severe weather is not expected with these precipitation
chances, and frequent lightning and heavy rainfall are the biggest
threats through mid-week.

&&

.LONG TERM...
(Thursday through next Tuesday)
Issued at 1220 PM CDT Tue Aug 12 2025

Rain chances begin to decrease on Thursday, as a front drops south
into middle Tennessee. Into the weekend, a high pressure system will
begin to take hold of the area, driving up our temperatures into the
start of the work week next week. Highs will climb into the mid to
upper 90s by Monday, with heat indices in the low triple digits. At
this time, heat advisories are not expected with heat indices
staying below 105 degrees. We will continue to monitor the situation
and possible need as we get closer to the weekend.

&&

.AVIATION...
(18Z TAFS)
Issued at 1233 PM CDT Tue Aug 12 2025

Deep low level moisture has moved into Middle Tennessee causing
sct to bkn MVFR cu field this morning and scattered showers and
storms. Cigs may bounce between VFR and MVFR at BNA/MQY through
22z before VFR conditions are established. The shower and storm
activity is scattered enough to only include Prob30 at BNA/MQY/CKV
this afternoon. The activity has been more widespread at CSV/SRB
so tempo groups were mentioned. There is a medium to high chance
MVFR cigs develop again after 09z at BNA/MQY/CKV while IFR cigs
develop at CSV/SRB. Winds will be southerly through the overnight
hours decreasing from 5-10 kts to less than 5 kts after 00z.

&&

.PRELIMINARY POINT TEMPS/POPS...
Nashville      74  91  73  92 /  40  60  40  30
Clarksville    74  91  71  91 /  40  50  30  30
Crossville     69  83  68  84 /  60  70  40  50
Columbia       73  91  71  91 /  30  60  40  40
Cookeville     71  85  69  86 /  50  70  40  40
Jamestown      69  83  68  84 /  50  70  50  50
Lawrenceburg   72  88  71  89 /  40  60  40  40
Murfreesboro   73  91  71  92 /  40  70  40  40
Waverly        72  91  71  90 /  40  50  30  30

&&

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

$$

SHORT TERM...Holley
LONG TERM....Holley
AVIATION.....Reagan
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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