Forecasts:

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South Twin Sister, United States Weather Forecast

Weather Forecast Issued (local time): 3 pm Friday 09 Dec 2016
  Days 0-3 South Twin Sister Weather Summary: A heavy fall of snow, heaviest during Sun afternoon. Temperatures will be well below freezing (max -8°C on Fri afternoon, min -12°C on Sun night). Winds decreasing (near gales from the SW on Sat night, light winds from the WNW by Mon morning). Days 3-6 South Twin Sister Weather Summary: Mostly dry. Temperatures will be well below freezing (max -10°C on Tue afternoon, min -12°C on Mon afternoon). Wind will be generally light.
Fri Saturday 10 Sunday 11 Monday 12 Tuesday 13 Wednesday 14 Thu
PM night AM PM night AM PM night AM PM night AM PM night AM PM night AM
See all weather maps
T washington.wind.30.cc23
T washington.wind.54.cc23
T washington.wind.78.cc23
T washington.wind.102.cc23
T washington.wind.126.cc23
 
moderate snow
heavy snow
moderate snow
heavy snow
heavy snow
heavy snow
heavy snow
snow showers
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
Wind
(km/h)
20 SW20
25 SW25
15 SSW15
25 SW25
35 SW35
25 WSW25
25 W25
15 NW15
10 NW10
10 NW10
5 ENE5
10 ENE10
10 NE10
5 N5
5 W5
10 WNW10
5 N5
15 NNE15
Summary mod. snow heavy snow mod. snow heavy snow heavy snow heavy snow heavy snow snow shwrs clear clear clear clear clear clear clear clear clear clear
Snow (cm) 7 27 9 19 30 21 26 12 - - - - - - - - - -
Rain (mm) - - - - - - - - - - - - - - - - - -
High °C -8 -8 -9 -8 -8 -9 -9 -10 -12 -11 -11 -11 -10 -10 -12 -12 -12 -11
Low °C -9 -10 -10 -9 -9 -9 -9 -12 -12 -12 -11 -11 -11 -11 -12 -12 -12 -11
Chill °C -14 -16 -19 -16 -17 -18 -18 -16 -18 -16 -15 -17 -15 -14 -16 -17 -16 -18
Freezing level (m) 500 300 550 650 800 800 750 0 0 0 0 0 0 0 0 0 0 0
South Twin Sister freezing level scale
mountain backdrop South Twin Sister freezing level
Sunrise - - 7:50 - - 7:50 - - 7:52 - - 7:52 - - 7:54 - - 7:54
Sunset 4:10 - - 4:10 - - 4:10 - - 4:10 - - 4:10 - - 4:12 - -

This table gives the weather forecast for South Twin Sister at the specific elevation of 2134 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of South Twin Sister. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of Washington.

 

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