– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 9 pm Fri 20 Feb Local TimeUpdates in: hr min sUpdate imminent
Issued: 9 pm Fri 20 Feb Local Time
Updates in:
Update imminent hr min s
Issued: 9 pm Fri 20 Feb Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryA heavy fall of snow, heaviest during Sat afternoon. Temperatures will be below freezing (max -3°C on Sat night, min -9°C on Fri night). Winds decreasing (strong winds from the SSW on Sun afternoon, light winds from the W by Mon morning). | Days 5–7 Weather SummaryA heavy fall of snow, heaviest during Tue night. Temperatures will be well below freezing (max -6°C on Thu morning, min -10°C on Mon night). Winds increasing (light winds from the WNW on Tue morning, strong winds from the W by Thu afternoon). | ||||||||||||||||||
Saturday 21 | Sunday 22 | Monday 23 | Tuesday 24 | Wednesday 25 | Thursday 26 | ||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | | |  | | |  | |  |  |  | | | | | | |
cloudy | cloudy | light snow | light snow | light snow | light snow | mod. snow | light snow | light snow | snow shwrs | light snow | snow shwrs | heavy snow | mod. snow | light snow | light snow | light snow | light snow | heavy snow | |
km/h | |||||||||||||||||||
 |  |  |  |  |  |  | |||||||||||||
— | — | 5 | 2 | 3 | 3 | 10 | 3 | 2 | 7 | 4 | 2 | 12 | 7 | 3 | 5 | 2 | 2 | 11 | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -5 | -4 | -4 | -3 | -3 | -5 | -5 | -6 | -5 | -7 | -10 | -10 | -9 | -8 | -7 | -7 | -6 | -6 | -7 |
min °C | -9 | -5 | -5 | -3 | -4 | -5 | -6 | -7 | -6 | -10 | -10 | -10 | -10 | -9 | -8 | -7 | -6 | -6 | -8 |
-16 | -12 | -12 | -9 | -13 | -14 | -14 | -10 | -14 | -18 | -14 | -16 | -19 | -18 | -18 | -16 | -15 | -15 | -18 | |
650 | 1450 | 1050 | 1650 | 1550 | 1250 | 1300 | 1150 | 1150 | 800 | 700 | 700 | 650 | 750 | 850 | 900 | 1000 | 1100 | 1050 | |
Cloud base (m) | 2350 | 2600 | 1750 | 2200 | 700 | 600 | 650 | 600 | 700 | 600 | 600 | 550 | 600 | 600 | 600 | 600 | 600 | 600 | 600 |
 | — | 7:03 | — | — | 7:01 | — | — | 7:00 | — | — | 6:58 | — | — | 6:56 | — | — | 6:54 | — | — |
 | — | — | 5:38 | — | — | 5:39 | — | — | 5:42 | — | — | 5:43 | — | — | 5:45 | — | — | 5:46 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: A heavy fall of snow, heaviest during Sat afternoon. Temperatures will be below freezing (max -3°C on Sat night, min -9°C on Fri night). Winds decreasing (strong winds from the SSW on Sun afternoon, light winds from the W by Mon morning).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Tue night. Temperatures will be well below freezing (max -6°C on Thu morning, min -10°C on Mon night). Winds increasing (light winds from the WNW on Tue morning, strong winds from the W 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.