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Sun Valley, Nevada 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Sun Valley NV
National Weather Service Forecast for: Sun Valley NV
Issued by: National Weather Service Reno, NV
Updated: 10:16 pm PDT Jul 24, 2025
 
Overnight

Overnight: A 20 percent chance of showers after 2am.  Mostly clear, with a low around 57. Northwest wind around 10 mph, with gusts as high as 20 mph.
Slight Chance
Showers

Friday

Friday: A slight chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm.  Increasing clouds, with a high near 85. Northwest wind around 5 mph becoming northeast in the morning.  Chance of precipitation is 60%.
Slight Chance
T-storms then
Showers
Likely
Friday
Night
Friday Night: A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 11pm.  Partly cloudy, with a low around 57. West wind 5 to 10 mph.  Chance of precipitation is 50%.
Chance
Showers then
Mostly Clear
Saturday

Saturday: Showers likely and possibly a thunderstorm after 11am.  Sunny through mid morning, then becoming mostly cloudy, with a high near 83. West wind around 5 mph.  Chance of precipitation is 60%.
Showers
Likely

Saturday
Night
Saturday Night: A 30 percent chance of showers and thunderstorms before 11pm.  Partly cloudy, with a low around 57. West wind 5 to 10 mph.
Chance
Showers then
Mostly Clear
Sunday

Sunday: A 20 percent chance of showers and thunderstorms after 11am.  Sunny, with a high near 85. Calm wind becoming southeast around 5 mph.
Slight Chance
T-storms

Sunday
Night
Sunday Night: A 20 percent chance of showers and thunderstorms before 11pm.  Partly cloudy, with a low around 58.
Slight Chance
T-storms then
Mostly Clear
Monday

Monday: Sunny, with a high near 88.
Sunny

Monday
Night
Monday Night: Partly cloudy, with a low around 59.
Partly Cloudy

Lo 57 °F Hi 85 °F Lo 57 °F Hi 83 °F Lo 57 °F Hi 85 °F Lo 58 °F Hi 88 °F Lo 59 °F

 

Overnight
 
A 20 percent chance of showers after 2am. Mostly clear, with a low around 57. Northwest wind around 10 mph, with gusts as high as 20 mph.
Friday
 
A slight chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Increasing clouds, with a high near 85. Northwest wind around 5 mph becoming northeast in the morning. Chance of precipitation is 60%.
Friday Night
 
A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 11pm. Partly cloudy, with a low around 57. West wind 5 to 10 mph. Chance of precipitation is 50%.
Saturday
 
Showers likely and possibly a thunderstorm after 11am. Sunny through mid morning, then becoming mostly cloudy, with a high near 83. West wind around 5 mph. Chance of precipitation is 60%.
Saturday Night
 
A 30 percent chance of showers and thunderstorms before 11pm. Partly cloudy, with a low around 57. West wind 5 to 10 mph.
Sunday
 
A 20 percent chance of showers and thunderstorms after 11am. Sunny, with a high near 85. Calm wind becoming southeast around 5 mph.
Sunday Night
 
A 20 percent chance of showers and thunderstorms before 11pm. Partly cloudy, with a low around 58.
Monday
 
Sunny, with a high near 88.
Monday Night
 
Partly cloudy, with a low around 59.
Tuesday
 
Sunny, with a high near 89.
Tuesday Night
 
Mostly clear, with a low around 59.
Wednesday
 
Sunny, with a high near 89.
Wednesday Night
 
Mostly clear, with a low around 59.
Thursday
 
Sunny, with a high near 88.

 

Forecast from NOAA-NWS for Sun Valley NV.

Weather Forecast Discussion
990
FXUS65 KREV 241951
AFDREV

Area Forecast Discussion
National Weather Service Reno NV
1251 PM PDT Thu Jul 24 2025

.KEY MESSAGES...

* Thunderstorm activity increases this afternoon, continuing each
  day through Sunday. Potential impacts include heavy downpours
  and flooding, strong outflows, small hail, and lightning.

* Cooler than normal temperatures expected for the rest of the
  week and the weekend.

* A gradual warming and drying trend returns early next week,
  bringing highs up to near or slightly above normal.

&&

.DISCUSSION...

An Aleutian low has taken residence, keeping a troughing pattern
just off the Pacific coast. This is going to be a factor in our
weather through the weekend, but the main feature for today is a
separate low tracking into the central coast of California for
today. The influence of the larger Aleutian low will help to
determine the steering on the California coastal low, which will
be absorbed into the troughing pattern as it migrates northeast
over the Central Valley. What does this mean for the end of the
week into the weekend, and beyond? Let`s dig in!

The central California low`s position will allow for upper level
flow from the southeast toward the northwest. This upper flow
will allow for slower storm motions(10-25 kts) today, which could
produce slow-moving and training showers that can produce heavy rainfall.
If these showers and storms produce heavy rainfall (0.6-0.9
inches of PWAT can do that here), we could see localized flooding
issues. Main concerns for storm hazard include heavy rainfall,
flooding (especially if storms set up near burn scars), small
hail, gusty outflow winds and frequent lightning. The lightning
threat today could include lightning strikes outside of wet cores
that have potential to spark new fire starts. Showers and some
storms also have a bit of staying power into tonight according to
CAMs, although the hazards of lightning and small hail will taper
as we lose daytime heating. Areas of focus will include
northeastern California where chances range 35-65%. Further south,
near the Tahoe Basin and into the US-395 corridor, chances will
be around 25-40%. South of the Tahoe Basin, basically along and
south of US-50 and southward into Mono County, chances will range
35-50%. For the US-95 corridor through Fallon and Yerington,
chances today around 10-15%.

For Friday, similar areas will see increasing chances as the low
tracks inland and has a closer proximity to the Sierra. Chances for
the Reno-Carson City-Minden and Tahoe areas will range 55-65%. The
Sierra will see chances 55-60%, while the Basin and Range will
see shower chances along the US-95 corridor reaching 40-45%. We
will have a better tap into the moisture source, so the potential
for heavy rains and flooding increases likewise. Particularly if
showers produce heavier rains today, antecedent soil moisture
could increase the likelihood of localized areas of saturated
soils that would be more productive in regards to flood potential.
The threat for dry lightning strikes will be more limited in
spatial extent for Friday, primarily found along the southern
Sierra and then the leeside valleys along the Sierra Front, and
northeastward through the Basin and Range up to the Oregon border.

Saturday the threat lingers for showers and storms that can produce
heavy rains, with chances and areas similar to Friday. The
difference here will be the shower activity is beginning to shift
eastward as the main trough begins to pick the inland low up into
the flow. Monday, the trough lingers, but shower chances dwindle
as the main forcing of the low becomes removed from the area.

That pesky, persistent Aleutian low will keep things interesting
as we look to the close of July. Showers are possible along the
Oregon border and also to the east toward the Utah/Nevada border.
Temperatures look to nudge slightly upward, but still hanging around
seasonal averages to close out the month. HRICH

&&

.AVIATION...

* Clouds will continue to build this afternoon as showers and
  storms arrive for today. All terminals will have a 30-50% chance
  for a shower or storm in the vicinity. Chances increase for
  Friday and Saturday, with 40-60% chances for most terminals.
  Lower chances for KNFL of around 10-20% through the weekend.
  Some showers may linger into the overnight tonight, but the
  threat will shift from thunder to mostly rain. Hazards today
  into the weekend may include erratic and gusty outflow winds,
  frequent lightning, and heavy rainfall that may reduce
  visibility, especially for mountain terrain. HRICH

&&

.FIRE WEATHER...

* Thunderstorm chances are expected each day through the weekend,
  with widespread coverage today through Saturday. Minimum
  relative humidity appears to increase from 30-40% today to
  50-75% by Saturday. The best chances for dry lightning will be
  Sunday once humidity starts to erode over the leeside valleys
  and Basin and Range. Frequent lightning can be expected each day
  through Saturday. However, with heavy rain expected, this could
  hinder the development of new fires. Regardless, new ignitions
  due to lightning are possible away from rain cores.
  HRICH/Giralte

&&

.REV Watches/Warnings/Advisories...
NV...None.
CA...None.

&&

$$
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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