– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 3 pm Tue 09 Dec Local TimeUpdates in: hr min sUpdate imminent
Issued: 3 pm Tue 09 Dec Local Time
Updates in:
Update imminent hr min s
Issued: 3 pm Tue 09 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 Wed morning. Freeze-thaw conditions (max 2°C on Tue night, min -3°C on Tue afternoon). Winds increasing (light winds from the SW on Tue afternoon, gales from the W by Wed night). | Days 5–7 Weather SummaryA moderate fall of snow, heaviest on Mon morning. Freeze-thaw conditions (max 1°C on Fri night, min -1°C on Fri afternoon). Winds increasing (moderate winds from the WSW on Fri night, gales from the SSW by Sun night). | ||||||||||||||||
Tue 9 | Wednesday 10 | Thursday 11 | Friday 12 | Saturday 13 | Sunday 14 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | | |  | |  | | |  |  | | | | | | |
light snow | heavy snow | heavy snow | heavy snow | heavy snow | cloudy | cloudy | light snow | cloudy | light snow | snow shwrs | some clouds | cloudy | light snow | light snow | cloudy | light snow | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
1 | 12 | 13 | 11 | 18 | — | — | 1 | — | 2 | 1 | — | — | 3 | 1 | — | 4 | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max°C | -2 | 2 | 2 | 2 | 1 | -3 | -2 | 0 | 0 | -1 | 1 | 1 | 1 | 1 | -1 | -1 | 1 |
min°C | -3 | 1 | 1 | 1 | -3 | -3 | -2 | -1 | -1 | -1 | 0 | 1 | 0 | -1 | -1 | -1 | 0 |
-8 | -7 | -7 | -7 | -13 | -11 | -9 | -8 | -8 | -8 | -6 | -5 | -7 | -8 | -8 | -8 | -7 | |
1500 | 2450 | 2450 | 2500 | 2000 | 1450 | 1450 | 2050 | 2200 | 2000 | 2250 | 2400 | 2350 | 2250 | 1950 | 2000 | 2350 | |
Cloud base (m) | 850 | 550 | 550 | 550 | 550 | 1700 | 2750 | 600 | 600 | 550 | 600 | 700 | 2050 | 650 | 600 | 600 | 700 |
 | — | — | 7:48 | — | — | 7:50 | — | — | 7:50 | — | — | 7:52 | — | — | 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 Wed morning. Freeze-thaw conditions (max 2°C on Tue night, min -3°C on Tue afternoon). Winds increasing (light winds from the SW on Tue afternoon, gales from the W by Wed night).
South Twin Sister Weather (Days 3-6):
A moderate fall of snow, heaviest on Mon morning. Freeze-thaw conditions (max 1°C on Fri night, min -1°C on Fri afternoon). Winds increasing (moderate winds from the WSW on Fri night, gales from the SSW 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.