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Rapid Valley, South Dakota 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Rapid Valley SD
National Weather Service Forecast for: Rapid Valley SD
Issued by: National Weather Service Rapid City, SD
Updated: 9:09 pm MDT Aug 10, 2025
 
Tonight

Tonight: Mostly clear, with a low around 55. Southwest wind around 5 mph.
Mostly Clear

Monday

Monday: Sunny, with a high near 87. South wind 5 to 10 mph becoming north in the afternoon. Winds could gust as high as 25 mph.
Sunny

Monday
Night
Monday Night: Mostly clear, with a low around 59. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Mostly Clear

Tuesday

Tuesday: Sunny, with a high near 84. Northwest wind 5 to 10 mph becoming southeast in the afternoon. Winds could gust as high as 20 mph.
Sunny

Tuesday
Night
Tuesday Night: Mostly clear, with a low around 64. South wind around 10 mph, with gusts as high as 20 mph.
Mostly Clear

Wednesday

Wednesday: Sunny, with a high near 97. South wind around 10 mph, with gusts as high as 25 mph.
Sunny

Wednesday
Night
Wednesday Night: Mostly clear, with a low around 66. South wind 5 to 10 mph becoming west after midnight. Winds could gust as high as 20 mph.
Mostly Clear

Thursday

Thursday: Sunny, with a high near 97. West wind 5 to 10 mph becoming east in the afternoon. Winds could gust as high as 20 mph.
Sunny

Thursday
Night
Thursday Night: A slight chance of showers and thunderstorms before midnight.  Partly cloudy, with a low around 65.
Slight Chance
T-storms then
Mostly Cloudy
Lo 55 °F Hi 87 °F Lo 59 °F Hi 84 °F Lo 64 °F Hi 97 °F Lo 66 °F Hi 97 °F Lo 65 °F

Hazardous Weather Outlook
 

Tonight
 
Mostly clear, with a low around 55. Southwest wind around 5 mph.
Monday
 
Sunny, with a high near 87. South wind 5 to 10 mph becoming north in the afternoon. Winds could gust as high as 25 mph.
Monday Night
 
Mostly clear, with a low around 59. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday
 
Sunny, with a high near 84. Northwest wind 5 to 10 mph becoming southeast in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
 
Mostly clear, with a low around 64. South wind around 10 mph, with gusts as high as 20 mph.
Wednesday
 
Sunny, with a high near 97. South wind around 10 mph, with gusts as high as 25 mph.
Wednesday Night
 
Mostly clear, with a low around 66. South wind 5 to 10 mph becoming west after midnight. Winds could gust as high as 20 mph.
Thursday
 
Sunny, with a high near 97. West wind 5 to 10 mph becoming east in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
 
A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 65.
Friday
 
Mostly sunny, with a high near 89.
Friday Night
 
A chance of showers and thunderstorms. Partly cloudy, with a low around 63.
Saturday
 
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 87.
Saturday Night
 
A chance of showers and thunderstorms. Partly cloudy, with a low around 63.
Sunday
 
Mostly sunny, with a high near 88.

 

Forecast from NOAA-NWS for Rapid Valley SD.

Weather Forecast Discussion
243
FXUS63 KUNR 102306
AFDUNR

Area Forecast Discussion For Western SD and Northeastern WY
National Weather Service Rapid City SD
506 PM MDT Sun Aug 10 2025

.KEY MESSAGES...

-Areas of smoke and haze today and tomorrow for western SD

-Isolated thunderstorms this afternoon across the Black Hills

-Hot temperatures expected by midweek

-Elevated fire weather concerns developing, southwestern SD

&&

.DISCUSSION...(This Evening Through Sunday)
Issued at 140 PM MDT Sun Aug 10 2025

We are tracking a small localized vorticity lobe that is
pinwheeling through eastern Wyoming. Out ahead of this area some
terrain influenced convective initiation has occurred across the
Black Hills with most the activity slowly moving east. Concern
will be for some small hail and lightning strikes. Much of the
convection will dissipate by the evening hours. The main weather
feature has been this upper trough that is responsible for
bringing down the smoke from the northwest. This upper trough will
continue to move to the east but we will hang on to the northwest
flow through Monday which will mean another round of smoke for the
region.

As we progress into Monday a weak wave will drop down from the
north and push a weak surface front through the region tomorrow
afternoon. This will help sweep out some of the smoke and could be
the catalyst to kickoff some afternoon thunderstorm chances over
northwestern SD. Tuesday will be the coolest day of the weak as
the post frontal environment will be entrenched across the region,
but we will be tracking the ridge axis become more dominant across
the four corners and this feature will be the main weather driver
come midweek for western SD and eastern WY. Temperatures are
progged to warm well into the 90s with triple digit readings
likely over the eastern Plains for Wednesday and Thursday. We then
turn our attention to Friday where the pattern shifts toward a
more active pattern that could bring more organized showers and
thunderstorms to the region.

&&

.AVIATION...(For the 00Z TAFS Through 00Z Monday Evening)
Issued At 505 PM MDT Sun Aug 10 2025

Isolated TS will end this evening. VFR conds through the period.
Isolated showers and TS will be possible over the NW half
tomorrow afternoon.

&&

.UNR WATCHES/WARNINGS/ADVISORIES...
SD...None.
WY...None.
&&

$$

DISCUSSION/KEY MESSAGES...Woodward
AVIATION...JC
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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