– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 3 pm Wed 31 Dec Local TimeUpdates in: hr min sUpdate imminent
Issued: 3 pm Wed 31 Dec Local Time
Updates in:
Update imminent hr min s
Issued: 3 pm Wed 31 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 Thu night. Freeze-thaw conditions (max 4°C on Wed afternoon, min -2°C on Thu afternoon). Winds decreasing (fresh winds from the SSW on Fri morning, light winds from the SSW by Fri night). | Days 5–7 Weather SummaryA heavy fall of snow, heaviest during Mon afternoon. Temperatures will be below freezing (max -2°C on Sat afternoon, min -7°C on Tue morning). Winds decreasing (near gales from the S on Sun morning, moderate winds from the SW by Mon morning). | ||||||||||||||||
Wed 31 | Thursday 1 | Friday 2 | Saturday 3 | Sunday 4 | Monday 5 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  |  |  |  | | |  | | | | | | | |
clear | some clouds | cloudy | cloudy | mod. snow | mod. snow | light snow | snow shwrs | light snow | light snow | light snow | light snow | light snow | light snow | light snow | mod. snow | mod. snow | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
— | — | — | — | 9 | 6 | 3 | 4 | 1 | 2 | 5 | 5 | 1 | 4 | 5 | 7 | 8 | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | 4 | 4 | 2 | 0 | -1 | -1 | -2 | 0 | -1 | -2 | -2 | -3 | -3 | -2 | -4 | -4 | -6 |
min °C | 4 | 2 | 1 | -2 | -1 | -1 | -2 | -2 | -1 | -2 | -3 | -4 | -3 | -3 | -4 | -5 | -6 |
1 | -2 | -4 | -7 | -6 | -8 | -9 | -7 | -7 | -10 | -10 | -14 | -11 | -10 | -11 | -12 | -13 | |
3000 | 2900 | 2550 | 2150 | 1800 | 1850 | 1800 | 1900 | 1950 | 1900 | 1900 | 1500 | 1550 | 1900 | 1550 | 1400 | 1250 | |
Cloud base (m) | 5700 | 2250 | 550 | 550 | 550 | 550 | 1650 | 550 | 650 | 600 | 600 | 1500 | 550 | 550 | 550 | ||
 | — | — | 8:00 | — | — | 8:00 | — | — | 8:00 | — | — | 8:00 | — | — | 8:00 | — | — |
 | 4:21 | — | — | 4:22 | — | — | 4:22 | — | — | 4:23 | — | — | 4:24 | — | — | 4:27 | — |
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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 night. Freeze-thaw conditions (max 4°C on Wed afternoon, min -2°C on Thu afternoon). Winds decreasing (fresh winds from the SSW on Fri morning, light winds from the SSW by Fri night).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Mon afternoon. Temperatures will be below freezing (max -2°C on Sat afternoon, min -7°C on Tue morning). Winds decreasing (near gales from the S on Sun morning, moderate winds from the SW by Mon 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.