Sun Valley, Idaho Weather Conditions

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Current Conditions

  • 22°
  • Cloudy
  • Wind: NW 7 mph
  • Humidity: 82%
  • Visibility: N/A
  • Dew Point: 17°
  • Pressure: 29.79 in. +
  • Heat Index: 13

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Next 12 Hours

6  pm
9  pm
12  am
3  am
6  am
Snow Showers
Snow Showers
Snow Showers
Snow Showers
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Thursday
  • Partly Cloudy
  • High: 20 °
  • Low: 4 °
  • Partly Cloudy
  • Friday
  • Clear
  • High: 22 °
  • Low: 6 °
  • Clear
  • Saturday
  • Clear
  • High: 25 °
  • Low: 7 °
  • Clear
  • Sunday
  • Clear
  • High: 25 °
  • Low: 8 °
  • Clear
  • Monday
  • Clear
  • High: 28 °
  • Low: 9 °
  • Clear

Forecast for Sun Valley, Idaho

Updated: 2:07 PM MST on November 25, 2015

Winter Weather Advisory in effect until 11 am MST Thursday...
  • Tonight

    Snow likely in the evening...then a chance of snow after midnight. Colder. Snow accumulation up to 2 inches. Lows 6 to 16.

  • Thanksgiving Day

    Partly sunny. A chance of snow in the morning...then a slight chance of snow in the afternoon. Little or no snow accumulation. Highs 15 to 25.

  • Thursday Night

    Mostly clear. Colder. Lows 2 below to 8 above zero.

  • Friday

    Sunny. Highs 17 to 24.

  • Friday Night

    Partly cloudy. Lows 3 below to 5 above zero.

  • Saturday and Saturday Night

    Partly cloudy. Highs 20 to 27. Lows 3 below to 7 above zero.

  • Sunday

    Partly sunny with a slight chance of snow. Highs 19 to 26.

  • Sunday Night and Monday

    Partly cloudy. A slight chance of snow. Lows 1 below to 7 above zero. Highs 19 to 28.

  • Monday Night and Tuesday

    Partly cloudy. Lows 6 to 14. Highs 21 to 28.

  • Tuesday Night and Wednesday

    Partly cloudy. Lows 10 to 18. Highs 27 to 34.

Severe Weather Alert Descriptions

 Winter Weather Advisory  Statement as of 1:40 PM MST on November 25, 2015

... Winter Weather Advisory remains in effect until 11 am MST

* impacts/timing... snow will continue through tonight before
diminishing during the morning. Combination of snow along with
blowing and drifting snow may create slick driving conditions.

* Snow accumulations... an additional 2 to 3 inches along with
blowing and drifting snow.

* Locations... Hailey... Craters of the Moon... Arco and MacKay.

Precautionary/preparedness actions...

A Winter Weather Advisory for snow and blowing snow means that
visibilities will be limited due to a combination of falling and
blowing snow. Use caution when traveling... especially in open

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Sun Valley, Sun Valley, ID

Updated: 5:20 PM MST

Temperature: 28.6 °F Dew Point: 9 °F Humidity: 43% Wind: NE at 8.7 mph Pressure: 29.69 in Hourly Precipitation: 0.00 in Windchill: 20 °F Graphs

Location: Meadowbrook Road, Hailey, ID

Updated: 5:15 PM MST

Temperature: 29.1 °F Dew Point: 28 °F Humidity: 96% Wind: North at - Pressure: 29.68 in Hourly Precipitation: - Windchill: 29 °F Graphs

Location: Downtown Ketchum, Ketchum, ID

Updated: 5:17 PM MST

Temperature: 27.7 °F Dew Point: 18 °F Humidity: 65% Wind: SW at 6.8 mph Pressure: 29.46 in Hourly Precipitation: - Windchill: 20 °F Graphs

Location: MesoWest, Ketchum, ID

Updated: 4:45 PM MST

Temperature: 16 °F Dew Point: 14 °F Humidity: 93% Wind: North at 16 mph Pressure: 29.59 in Hourly Precipitation: 0.00 in Windchill: 1 °F Graphs

Location: MesoWest, Ketchum, ID

Updated: 4:00 PM MST

Temperature: 18 °F Dew Point: 17 °F Humidity: 94% Wind: North at 11 mph Pressure: 29.59 in Hourly Precipitation: 0.00 in Windchill: 6 °F Graphs

Location: Audubon Place, Hailey, ID

Updated: 5:16 PM MST

Temperature: 32.0 °F Dew Point: 25 °F Humidity: 75% Wind: North at - Pressure: 29.81 in Hourly Precipitation: - Windchill: 32 °F Graphs

Location: Indian Creek, Hailey, ID

Updated: 5:20 PM MST

Temperature: 28.6 °F Dew Point: 24 °F Humidity: 82% Wind: Calm Pressure: 25.39 in Hourly Precipitation: 0.00 in Windchill: 29 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion

Area forecast discussion 
National Weather Service Pocatello Idaho 
420 PM MST Wednesday Nov 25 2015 

Update...adjusted winds tongiht for very strong northerly 
surface pressure gradient resulting in winds gusting around 50 to 
55 miles per hour in a few locations in the Arco desert and Interstate 15 
near DuBois. Gradient looks strong through or a bit later than 
midnight. Receiver station 


Previous discussion... /issued 142 PM MST Wednesday Nov 25 2015/ 

Short term...tonight through Friday. 

Main center of the low is still over central Nevada which seems to 
be the timing of the forecast off. Snow has been ongoing across 
the base of the central mountains as expected and should continue 
into the evening before diminishing overnight. Snow showers have 
been developing over the southern Highlands...more or less as 
expected but sun actually broke out across the eastern Highlands 
and snow has not been widespread across the Magic Valley. Thinking 
the slow progression of the low is largely to blame for both of 
these factors. However the overall forecast is still reasonably 
OK. The low continues to track east tonight. Models continue to 
show snow developing across Utah and east Idaho which will work 
its way into southern and eastern Idaho throughout the night. Snow 
intensity will weaken during the morning hours on Thanksgiving and 
begin to diminish during the afternoon and evening. Additional 
snow totals starting 00z this evening should amount to 2 to 3 
inches from Pocatello to Rexburg...including the Driggs area. An 
additional 2 to 3 inches is likely from Carey to Arco. The Magic 
Valley including I 84 to the Utah border should see 2 to 5 inches. 
Meanwhile 2 to 4 inches is likely across the southeast Highlands 
including Soda Springs and Montpelier areas. Winds will continue 
to produce blowing and drifting conditions...mainly across the 
snake plain from near the i84/86 interchange northward throughout 
the night. 

Snowfall will come to an end Thanksgiving night with cold but dry 
weather likely for Friday. 


Long term...Friday night through next Wednesday night. There continues to be 
disagreement between the GFS and European model (ecmwf) product suites on the track 
of an upper level low through the Great Basin. The GFS has a slower 
eastward progression...with the low passing overhead during the 
weekend. The European model (ecmwf) moves the low out farther south and 
quickly...leaving eastern Idaho very dry. Taking a cue from ncep's 
thinking...they have abandoned the GFS solution and are using other 
models for its preferred solution. Would like to do this as 
well...but intercede coordination would suffer quite a bit. So 
have lowered probability of precipitation and sky condition some more starting sun. Still 
expecting a cold period with northerly air flow and no relief to 
the cold air through this period. Would like to use colder European model (ecmwf) 
but again coordination has prevented going much colder. Very 
little wind expected with the dense cold air continuing. Messick 

Aviation...ksun should be under northwest flow by the late evening 
and the strong downslope in this part of Idaho means improving 
conditions when it develops...which looks around 26/04z. At 
kbyi...bands of snow will continue through the night...potentially 
slight improvement by 26/15z if fog doesn't ruin things. Still 
expecting kpih and kida to have some impact to ceiling and visibility due to 
snow...but it has been slow to develop. This is why most of the 
forecasted IFR conditions are only tempo. Kida should be better as 
the north wind is condition. Messick 


Pih watches/warnings/advisories... 
Winter Weather Advisory until 11 am MST Thursday for idz019>021- 

Winter Storm Warning until 11 am MST Thursday for idz017-022. 



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