Mountain resort image
– Lat/Long: 48.71° N 121.99° W

South Twin Sister
Weather Forecast, United States

Issued: 4am Sat 31 Oct Local Time
Updates in: hr min s
Update imminent
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South Twin Sister Weather (Days 0-3):

Some drizzle, heaviest during Mon night. Freeze-thaw conditions (max 9°C on Sun afternoon, min 0°C on Sat morning). Winds increasing (light winds from the WSW on Sun morning, near gales from the SSW by Mon night).

(Days 3-6):

A heavy fall of snow, heaviest during Tue morning. Freeze-thaw conditions (max 2°C on Tue morning, min -8°C on Thu morning). Winds decreasing (severe gales from the SW on Wed night, light winds from the WSW by Thu afternoon).

AM PM night AM PM night AM PM night AM PM night AM PM night AM PM night
clear
clear
clear
clear
clear
clear
clear
clear
rain showers
moderate snow
light snow
moderate snow
snow showers
light snow
heavy snow
snow showers
partially cloudy
partially cloudy
Wind km/h
15 W15
15 WNW15
15 W15
10 WSW10
15 SW15
25 SSW25
30 SSW30
30 SSW30
55 SSW55
35 SSW35
35 SSW35
65 SW65
35 S35
70 SSW70
60 WSW60
30 W30
20 SSW20
30 SSE30
clear clear clear clear clear clear clear clear rain shwrs mod. snow light snow mod. snow snow shwrs light snow heavy snow snow shwrs some clouds some clouds
Rain
Rain mm
- - - - - - - - 1 - - - - - - - - -
Snow
Snow cm
- - - - - - - - - 10 1 6 1 2 14 2 - -
High °C
0 3 7 8 9 9 8 7 7 2 1 1 0 1 2 -7 -6 -5
Low °C
0 1 4 7 8 8 7 7 3 1 1 1 0 0 -5 -8 -7 -6
Chill °C
-4 -1 4 6 7 6 4 3 2 -4 -5 -6 -6 -8 -7 -18 -12 -12
Freezing level m
2300 3350 3450 3800 3750 3600 3550 3450 3250 2550 2300 2400 2200 2250 1750 1100 1300 1450
Sea lvl3000ft6000ft9000ft12000ft15000ft
mountain backdrop
037899877211012-7-6-5159111212111010455455-3-20791014161415171381011111111565
Sunrise
7:54 - - 7:54 - - 7:56 - - 7:58 - - 8:00 - - 8:00 - -
Sunset
- 5:47 - - 5:45 - - 5:45 - - 5:43 - - 5:42 - - 5:39 -

South Twin Sister Weather (Days 0-3):

The weather forecast for South Twin Sister is: Some drizzle, heaviest during Mon nightFreeze-thaw conditions (max 9°C on Sun afternoon, min 0°C on Sat morning)Winds increasing (light winds from the WSW on Sun morning, near gales from the SSW by Mon night).

South Twin Sister Weather (Days 3-6):

A heavy fall of snow, heaviest during Tue morningFreeze-thaw conditions (max 2°C on Tue morning, min -8°C on Thu morning)Winds decreasing (severe gales from the SW on Wed night, light winds from the WSW by Thu afternoon).

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.

Live conditions reported by 5 closest weather stations

Weather StationTemp.WeatherWind
Cloud
Visibility
Cloud / Visibility
Skagit Burlingto / t Vernon Airport
41 km SSW
43m alt.
1 hour ago
4° C
partially cloudy
Dry and partly cloudy.
11
Light winds from the NE
(11 kph at 40).
16 km
Low: few
Mid: broken
High: broken
Bellingham Airport
41 km W
50m alt.
1 hour ago
1.7° C
clear
Clear
0
Calm
(0 kph at 0).
16 km
BUOY-46118
44 km WSW
3m alt.
1 hour ago
6.1° C
7
Light winds from the W
(7 kph at 270).
SHIP7321
45 km WSW
-m alt.
3 hours ago
6.5° C
-
4
Calm
(4 kph at 120).
BUOY-PBFW1
45 km SSW
3m alt.
2 hours ago
2.0° C
4
Calm
(4 kph at 240).

* NOTE: not all weather observatories update at the same frequency which is the reason why some locations may show data from stations that are further away than known closer ones.