– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 3 pm Mon 08 Dec Local TimeUpdates in: hr min sUpdate imminent
Issued: 3 pm Mon 08 Dec Local Time
Updates in:
Update imminent hr min s
Issued: 3 pm Mon 08 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 2°C on Tue night, min -7°C on Mon night). Winds decreasing (gales from the WSW on Mon afternoon, light winds from the WSW by Tue morning). | Days 5–7 Weather SummaryA heavy fall of snow, heaviest during Sat night. Freeze-thaw conditions (max 1°C on Sat morning, min -4°C on Sat night). Winds decreasing (strong winds from the SSW on Sat afternoon, moderate winds from the WSW by Sun morning). | ||||||||||||||||
Mon 8 | Tuesday 9 | Wednesday 10 | Thursday 11 | Friday 12 | Saturday 13 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | | |  | | |  |  | | | | | | | |
heavy snow | heavy snow | some clouds | light snow | heavy snow | heavy snow | mod. snow | heavy snow | light snow | cloudy | light snow | light snow | light snow | light snow | cloudy | light snow | heavy snow | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
11 | 15 | — | 1 | 11 | 12 | 7 | 16 | 1 | — | 2 | 1 | 1 | 2 | — | 1 | 16 | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max°C | 0 | -2 | -4 | -3 | 2 | -1 | -1 | -1 | -3 | -2 | 0 | 0 | -1 | 0 | 1 | -1 | -1 |
min°C | 0 | -7 | -5 | -3 | 0 | -1 | -1 | -3 | -3 | -3 | -2 | 0 | -1 | -1 | 0 | -1 | -4 |
-9 | -17 | -12 | -9 | -8 | -9 | -9 | -12 | -11 | -10 | -9 | -7 | -8 | -7 | -6 | -9 | -11 | |
2200 | 1100 | 1250 | 1550 | 2400 | 1850 | 1950 | 1800 | 1550 | 1600 | 1900 | 2150 | 2000 | 2000 | 2250 | 2000 | 1750 | |
Cloud base (m) | 550 | 750 | 700 | 2150 | 550 | 550 | 550 | 600 | 600 | 2350 | 600 | 600 | 550 | 550 | 600 | 850 | 550 |
 | — | — | 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 2°C on Tue night, min -7°C on Mon night). Winds decreasing (gales from the WSW on Mon afternoon, light winds from the WSW by Tue morning).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Sat night. Freeze-thaw conditions (max 1°C on Sat morning, min -4°C on Sat night). Winds decreasing (strong winds from the SSW on Sat afternoon, moderate winds from the WSW by Sun 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.