– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 3 pm Sun 22 Feb Local TimeUpdates in: hr min sUpdate imminent
Issued: 3 pm Sun 22 Feb Local Time
Updates in:
Update imminent hr min s
Issued: 3 pm Sun 22 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 Mon morning. Temperatures will be below freezing (max -5°C on Sun afternoon, min -10°C on Tue night). Winds decreasing (near gales from the SSW on Sun night, calm by Mon night). | Days 5–7 Weather SummaryA heavy fall of snow, heaviest during Fri afternoon. Temperatures will be well below freezing (max -6°C on Wed night, min -9°C on Fri afternoon). Winds decreasing (strong winds from the W on Thu morning, light winds from the W by Sat morning). | ||||||||||||||||
Sun 22 | Monday 23 | Tuesday 24 | Wednesday 25 | Thursday 26 | Friday 27 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  | | | | |  | | | | |  |  | |
light snow | heavy snow | heavy snow | cloudy | some clouds | some clouds | light snow | heavy snow | heavy snow | light snow | light snow | cloudy | light snow | light snow | light snow | mod. snow | snow shwrs | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
2 | 13 | 11 | — | — | — | 3 | 12 | 12 | 5 | 3 | — | 1 | 5 | 5 | 7 | 3 | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -5 | -5 | -9 | -8 | -5 | -5 | -7 | -8 | -8 | -7 | -6 | -6 | -6 | -6 | -7 | -8 | -8 |
min °C | -6 | -8 | -9 | -9 | -7 | -5 | -8 | -10 | -8 | -7 | -6 | -6 | -6 | -6 | -7 | -9 | -9 |
-16 | -17 | -19 | -16 | -12 | -10 | -14 | -19 | -18 | -16 | -15 | -16 | -15 | -15 | -16 | -19 | -19 | |
1250 | 1250 | 800 | 950 | 200 | 1200 | 900 | 600 | 800 | 1000 | 950 | 1050 | 1100 | 1000 | 900 | 900 | 350 | |
Cloud base (m) | 600 | 550 | 600 | 600 | 650 | 600 | 1650 | 550 | 600 | 600 | 600 | 600 | 600 | 600 | 600 | 550 | 600 |
 | — | — | 7:00 | — | — | 6:58 | — | — | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — |
 | 5:39 | — | — | 5:42 | — | — | 5:43 | — | — | 5:45 | — | — | 5:46 | — | — | 5:47 | — |
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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 Mon morning. Temperatures will be below freezing (max -5°C on Sun afternoon, min -10°C on Tue night). Winds decreasing (near gales from the SSW on Sun night, calm by Mon night).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Fri afternoon. Temperatures will be well below freezing (max -6°C on Wed night, min -9°C on Fri afternoon). Winds decreasing (strong winds from the W on Thu morning, light winds from the W by Sat morning).
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.