– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 10 pm Sat 11 Apr Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 pm Sat 11 Apr Local Time
Updates in:
Update imminent hr min s
Issued: 10 pm Sat 11 Apr Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryDrizzle, on Sun afternoon followed by colder weather and a moderate fall of snow, heaviest on Tue afternoon.. Freeze-thaw conditions (max 3°C on Sat night, min -4°C on Tue morning). Winds increasing (calm on Sat night, strong winds from the S by Tue afternoon). | Days 5–7 Weather SummaryA heavy fall of snow, heaviest during Tue night. Temperatures will be below freezing (max -2°C on Tue night, min -7°C on Tue night). Winds decreasing (near gales from the SSW on Tue night, calm by Fri morning). | ||||||||||||||||||
Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | ||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  | |  |  | |  |  |  |  | |  | |  | | | | | | |
some clouds | rain shwrs | rain shwrs | snow shwrs | cloudy | cloudy | light snow | light snow | mod. snow | heavy snow | light snow | snow shwrs | snow shwrs | some clouds | snow shwrs | some clouds | some clouds | some clouds | some clouds | |
km/h | |||||||||||||||||||
 |  |  |  |  |  |  | |||||||||||||
— | — | — | 1 | — | — | 2 | 4 | 8 | 15 | 4 | 5 | 1 | — | 2 | — | — | — | — | |
— | 0.1 | 0.6 | 0.4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | 3 | 3 | 3 | 3 | -1 | -1 | -1 | -3 | -3 | -2 | -7 | -5 | -5 | -5 | -4 | -4 | -4 | -3 | -2 |
min °C | 2 | 3 | 3 | 0 | -1 | -1 | -3 | -4 | -3 | -7 | -7 | -6 | -6 | -6 | -4 | -5 | -5 | -3 | -3 |
2 | 3 | 2 | -4 | -5 | -5 | -8 | -11 | -12 | -15 | -14 | -11 | -10 | -9 | -8 | -8 | -7 | -3 | -3 | |
2000 | 2050 | 2000 | 1700 | 1300 | 1350 | 1100 | 1000 | 1050 | 450 | 650 | 850 | 400 | 800 | 1000 | 450 | 900 | 1150 | 800 | |
Cloud base (m) | 600 | 1600 | 750 | 750 | 600 | 600 | 550 | 550 | 550 | 600 | 550 | 600 | 650 | 600 | 650 | 700 | 600 | 650 | 700 |
 | — | 6:22 | — | — | 6:20 | — | — | 6:18 | — | — | 6:16 | — | — | 6:15 | — | — | 6:13 | — | — |
 | — | — | 7:53 | — | — | 7:55 | — | — | 7:57 | — | — | 7:59 | — | — | — | 8:00 | — | — | 8:01 |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Drizzle, on Sun afternoon followed by colder weather and a moderate fall of snow, heaviest on Tue afternoon.. Freeze-thaw conditions (max 3°C on Sat night, min -4°C on Tue morning). Winds increasing (calm on Sat night, strong winds from the S by Tue afternoon).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Tue night. Temperatures will be below freezing (max -2°C on Tue night, min -7°C on Tue night). Winds decreasing (near gales from the SSW on Tue night, calm by Fri morning).
This table gives the weather forecast for South Twin Sister at the specific elevation of 1500 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.