– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 9 pm Wed 24 Dec Local TimeUpdates in: hr min sUpdate imminent
Issued: 9 pm Wed 24 Dec Local Time
Updates in:
Update imminent hr min s
Issued: 9 pm Wed 24 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 -2°C on Wed night, min -12°C on Fri afternoon). Winds increasing (calm on Wed night, strong winds from the WSW by Fri afternoon). | Days 5–7 Weather SummaryMostly dry. Freeze-thaw conditions (max 3°C on Tue morning, min -9°C on Sat night). Wind will be generally light. | ||||||||||||||||||
Thursday 25 | Friday 26 | Saturday 27 | Sunday 28 | Monday 29 | Tuesday 30 | ||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | | | |  | | | | | | | | | | |  | |
some clouds | cloudy | heavy snow | snow shwrs | heavy snow | heavy snow | snow shwrs | some clouds | cloudy | some clouds | cloudy | cloudy | some clouds | some clouds | some clouds | some clouds | some clouds | cloudy | cloudy | |
km/h | |||||||||||||||||||
 |  |  |  |  |  |  | |||||||||||||
— | — | 15 | 1 | 12 | 14 | 5 | — | — | — | — | — | — | — | — | — | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -2 | -3 | -5 | -6 | -7 | -11 | -10 | -8 | -8 | -5 | -5 | -4 | -1 | 0 | 0 | 2 | 3 | 2 | 2 |
min °C | -6 | -3 | -5 | -7 | -8 | -12 | -12 | -9 | -9 | -9 | -5 | -5 | -3 | -1 | 0 | 0 | 3 | 2 | -1 |
-11 | -8 | -14 | -14 | -17 | -22 | -20 | -15 | -17 | -18 | -12 | -12 | -9 | -7 | -5 | -5 | -2 | -3 | -7 | |
1350 | 1800 | 1050 | 1100 | 950 | 600 | 300 | 0 | 400 | 0 | 500 | 850 | 0 | 2000 | 2100 | 2400 | 2700 | 2450 | 2500 | |
Cloud base (m) | 600 | 2800 | 1600 | 550 | 600 | 550 | 550 | 650 | 600 | 2100 | 650 | 650 | 800 | 950 | 650 | 2250 | 2450 | 700 | 1950 |
 | — | 7:58 | — | — | 8:00 | — | — | 8:00 | — | — | 8:00 | — | — | 8:00 | — | — | 8:00 | — | — |
 | — | — | 4:15 | — | — | 4:16 | — | — | 4:17 | — | — | 4:17 | — | — | 4:19 | — | — | 4:20 | — |
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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 -2°C on Wed night, min -12°C on Fri afternoon). Winds increasing (calm on Wed night, strong winds from the WSW by Fri afternoon).
South Twin Sister Weather (Days 3-6):
Mostly dry. Freeze-thaw conditions (max 3°C on Tue morning, min -9°C on Sat night). Wind will be generally light.
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.