– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 10 am Thu 12 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 am Thu 12 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Thu 12 Mar Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryA heavy fall of snow, heaviest during Thu afternoon. Temperatures will be well below freezing (max -6°C on Thu morning, min -9°C on Fri night). Winds decreasing (strong winds from the W on Thu morning, calm by Sat night). | Days 4–6 Weather SummaryA heavy fall of snow, heaviest during Mon night. Becoming milder with heavy rain (total 37mm) on Tue morning. Freeze-thaw conditions (max 5°C on Tue night, min -6°C on Sun morning). Winds increasing (calm on Sun morning, strong winds from the SSE by Mon night). | |||||||||||||||||
Thursday 12 | Friday 13 | Saturday 14 | Sunday 15 | Monday 16 | Tuesday 17 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  |  |  |  |  | | | | | |  |  | |  | |
light snow | mod. snow | mod. snow | light snow | cloudy | light snow | some clouds | snow shwrs | some clouds | cloudy | light snow | mod. snow | light snow | light snow | heavy snow | heavy rain | heavy rain | mod. rain | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
2 | 8 | 10 | 2 | — | 4 | — | 1 | — | — | 1 | 9 | 3 | 2 | 11 | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 2 | 11 | 12 | 8 | |
max °C | -6 | -7 | -6 | -6 | -6 | -6 | -9 | -8 | -7 | -5 | -5 | -1 | 1 | 2 | 2 | 3 | 3 | 5 |
min °C | -7 | -7 | -7 | -6 | -6 | -9 | -9 | -9 | -8 | -6 | -5 | -3 | 1 | 2 | 1 | 3 | 3 | 3 |
-16 | -15 | -11 | -10 | -10 | -16 | -15 | -16 | -12 | -8 | -10 | -9 | -5 | -4 | -6 | -2 | 0 | -1 | |
600 | 500 | 400 | 650 | 650 | 200 | 350 | 500 | 0 | 700 | 700 | 1100 | 2350 | 2200 | 2400 | 2150 | 2100 | 2300 | |
Cloud base (m) | 600 | 600 | 600 | 550 | 550 | 600 | 900 | 700 | 750 | 2350 | 1550 | 600 | 600 | 600 | 600 | 600 | 550 | 600 |
 | 7:28 | — | — | 7:26 | — | — | 7:22 | — | — | 7:20 | — | — | 7:18 | — | — | 7:16 | — | — |
 | — | 7:07 | — | — | 7:08 | — | — | 7:10 | — | — | 7:12 | — | — | 7:14 | — | — | 7:15 | — |
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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 Thu afternoon. Temperatures will be well below freezing (max -6°C on Thu morning, min -9°C on Fri night). Winds decreasing (strong winds from the W on Thu morning, calm by Sat night).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Mon night. Becoming milder with heavy rain (total 37mm) on Tue morning. Freeze-thaw conditions (max 5°C on Tue night, min -6°C on Sun morning). Winds increasing (calm on Sun morning, strong winds from the SSE by Mon night).
This table gives the weather forecast for South Twin Sister at the specific elevation of 1500 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.