– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 3 pm Tue 16 Dec Local TimeUpdates in: hr min sUpdate imminent
Issued: 3 pm Tue 16 Dec Local Time
Updates in:
Update imminent hr min s
Issued: 3 pm Tue 16 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 Fri morning. Temperatures will be below freezing (max -1°C on Tue afternoon, min -11°C on Thu night). Winds decreasing (stormy winds from the WSW on Tue night, fresh winds from the S by Wed night). | Days 5–7 Weather SummaryA heavy fall of snow, heaviest during Sun morning. Temperatures will be well below freezing (max -8°C on Sat afternoon, min -11°C on Fri night). Winds increasing (moderate winds from the SSW on Sat afternoon, near gales from the SW by Sun night). | ||||||||||||||||
Tue 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  | | |  |  | | |  | | | | | | | | | |
mod. snow | heavy snow | mod. snow | mod. snow | mod. snow | light snow | mod. snow | heavy snow | heavy snow | heavy snow | heavy snow | light snow | light snow | mod. snow | heavy snow | heavy snow | heavy snow | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
9 | 19 | 7 | 8 | 6 | 2 | 6 | 15 | 19 | 16 | 20 | 2 | 3 | 9 | 22 | 11 | 20 | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max°C | -1 | -1 | -10 | -9 | -7 | -2 | -1 | -6 | -10 | -10 | -10 | -9 | -8 | -8 | -8 | -9 | -8 |
min°C | -1 | -10 | -10 | -9 | -8 | -6 | -3 | -11 | -11 | -10 | -11 | -9 | -8 | -8 | -8 | -9 | -9 |
-10 | -24 | -22 | -20 | -17 | -15 | -13 | -22 | -22 | -20 | -22 | -18 | -17 | -19 | -19 | -19 | -18 | |
1950 | 1950 | 750 | 850 | 950 | 1050 | 1700 | 650 | 650 | 650 | 600 | 750 | 850 | 800 | 750 | 750 | 800 | |
Cloud base (m) | 500 | 450 | 600 | 600 | 600 | 500 | 500 | 650 | 550 | 550 | 550 | 550 | 550 | 550 | 500 | 550 | 550 |
 | — | — | 7:54 | — | — | 7:56 | — | — | 7:56 | — | — | 7:56 | — | — | 7:58 | — | — |
 | 4:12 | — | — | 4:12 | — | — | 4:12 | — | — | 4:13 | — | — | 4:13 | — | — | 4:14 | — |
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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 Fri morning. Temperatures will be below freezing (max -1°C on Tue afternoon, min -11°C on Thu night). Winds decreasing (stormy winds from the WSW on Tue night, fresh winds from the S by Wed night).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Sun morning. Temperatures will be well below freezing (max -8°C on Sat afternoon, min -11°C on Fri night). Winds increasing (moderate winds from the SSW on Sat afternoon, near gales from the SW by Sun night).
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.