– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 9 pm Sun 07 Dec Local TimeUpdates in: hr min sUpdate imminent
Issued: 9 pm Sun 07 Dec Local Time
Updates in:
Update imminent hr min s
Issued: 9 pm Sun 07 Dec 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 night. Freeze-thaw conditions (max 1°C on Tue night, min -5°C on Mon night). Winds increasing (light winds from the W on Tue morning, severe gales from the W by Tue night). | Days 5–7 Weather SummaryA heavy fall of snow, heaviest during Fri night. Temperatures will be below freezing (max 0°C on Fri morning, min -3°C on Wed night). Mainly strong winds. | ||||||||||||||||||
Monday 8 | Tuesday 9 | Wednesday 10 | Thursday 11 | Friday 12 | Saturday 13 | ||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  | |  |  |  |  | |  | | | | | | | | | |  | |
light snow | light snow | light snow | heavy snow | some clouds | cloudy | mod. snow | light snow | mod. snow | mod. snow | light snow | cloudy | light snow | cloudy | light snow | mod. snow | light snow | mod. snow | snow shwrs | |
km/h | |||||||||||||||||||
 |  |  |  |  |  |  | |||||||||||||
5 | 3 | 5 | 14 | — | — | 7 | 5 | 6 | 8 | 2 | — | 2 | — | 3 | 6 | 1 | 8 | 10 | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max°C | -4 | 0 | 0 | 0 | -4 | -2 | 1 | -4 | -3 | -2 | -3 | -3 | -1 | 0 | -1 | 0 | -1 | -1 | -4 |
min°C | -4 | -2 | 0 | -5 | -5 | -4 | -3 | -4 | -3 | -3 | -3 | -3 | -2 | 0 | -1 | -1 | -2 | -2 | -6 |
-12 | -11 | -9 | -14 | -12 | -10 | -12 | -13 | -11 | -12 | -11 | -10 | -9 | -7 | -9 | -8 | -10 | -10 | -15 | |
1350 | 1550 | 2200 | 1400 | 1200 | 1500 | 2350 | 1350 | 1350 | 1600 | 1550 | 1500 | 1350 | 2050 | 2000 | 2050 | 2000 | 2000 | 1250 | |
Cloud base (m) | 600 | 550 | 550 | 600 | 600 | 750 | 550 | 800 | 600 | 600 | 600 | 650 | 900 | 600 | 550 | 550 | 650 | 550 | 650 |
 | — | 7:47 | — | — | 7:48 | — | — | 7:48 | — | — | 7:50 | — | — | 7:50 | — | — | 7:52 | — | — |
 | — | — | 4:10 | — | — | 4:10 | — | — | 4:10 | — | — | 4:10 | — | — | 4:10 | — | — | 4:10 | — |
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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 night. Freeze-thaw conditions (max 1°C on Tue night, min -5°C on Mon night). Winds increasing (light winds from the W on Tue morning, severe gales from the W by Tue night).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Fri night. Temperatures will be below freezing (max 0°C on Fri morning, min -3°C on Wed night). 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.