– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 3 pm Sun 04 Jan Local TimeUpdates in: hr min sUpdate imminent
Issued: 3 pm Sun 04 Jan Local Time
Updates in:
Update imminent hr min s
Issued: 3 pm Sun 04 Jan 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 Tue afternoon. Temperatures will be well below freezing (max -7°C on Sun afternoon, min -11°C on Tue night). Winds increasing (light winds from the SW on Sun night, strong winds from the SW by Tue morning). | Days 5–7 Weather SummaryA heavy fall of snow, heaviest during Wed afternoon. Temperatures will be below freezing (max 0°C on Sat morning, min -13°C on Thu morning). Mainly strong winds. | ||||||||||||||||
Sun 4 | Monday 5 | Tuesday 6 | Wednesday 7 | Thursday 8 | Friday 9 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  | | | | |  |  | | | |  |  | |
mod. snow | heavy snow | light snow | some clouds | mod. snow | heavy snow | heavy snow | heavy snow | heavy snow | heavy snow | snow shwrs | snow shwrs | mod. snow | heavy snow | light snow | cloudy | some clouds | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
6 | 15 | 3 | — | 8 | 18 | 21 | 22 | 16 | 14 | 13 | 9 | 9 | 11 | 4 | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -7 | -8 | -8 | -9 | -8 | -7 | -8 | -10 | -10 | -11 | -11 | -12 | -9 | -6 | -5 | -3 | -1 |
min °C | -7 | -8 | -9 | -9 | -10 | -7 | -9 | -11 | -11 | -11 | -11 | -13 | -10 | -8 | -5 | -4 | -3 |
-16 | -17 | -17 | -17 | -19 | -18 | -20 | -23 | -23 | -21 | -18 | -26 | -21 | -17 | -14 | -11 | -10 | |
1050 | 950 | 850 | 800 | 650 | 750 | 850 | 600 | 600 | 600 | 0 | 400 | 600 | 750 | 1050 | 1200 | 1700 | |
Cloud base (m) | 550 | 550 | 600 | 600 | 550 | 550 | 550 | 550 | 550 | 550 | 800 | 600 | 650 | 600 | 600 | 650 | 950 |
 | — | — | 8:00 | — | — | 7:58 | — | — | 7:58 | — | — | 7:58 | — | — | 7:58 | — | — |
 | 4:24 | — | — | 4:27 | — | — | 4:28 | — | — | 4:29 | — | — | 4:30 | — | — | 4:30 | — |
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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 Tue afternoon. Temperatures will be well below freezing (max -7°C on Sun afternoon, min -11°C on Tue night). Winds increasing (light winds from the SW on Sun night, strong winds from the SW by Tue morning).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Wed afternoon. Temperatures will be below freezing (max 0°C on Sat morning, min -13°C on Thu morning). Mainly strong winds.
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.