– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 pm Fri 10 Apr Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 pm Fri 10 Apr Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Fri 10 Apr Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryA light covering of new snow mostly falling on Sat afternoon. Becoming milder with light rain (total 2mm) on Sun afternoon. Freeze-thaw conditions (max 9°C on Fri afternoon, min -2°C on Sun night). Wind will be generally light. | Days 5–7 Weather SummaryA heavy fall of snow, heaviest during Tue night. Temperatures will be below freezing (max -2°C on Mon afternoon, min -7°C on Tue night). Winds decreasing (strong winds from the S on Tue afternoon, calm by Wed night). | ||||||||||||||||
Fri 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  | |  |  | | |  | |  | | |  | |
cloudy | rain shwrs | light rain | light snow | light snow | some clouds | light rain | snow shwrs | snow shwrs | light snow | light snow | mod. snow | mod. snow | heavy snow | light snow | light snow | some clouds | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
— | — | — | 3 | 1 | — | — | 1 | 2 | 2 | 2 | 6 | 8 | 26 | 5 | 3 | — | |
— | 0.6 | 0.4 | — | — | — | 1.2 | — | — | — | — | — | — | — | — | — | — | |
max °C | 9 | 9 | 4 | 2 | 1 | 1 | 2 | 2 | -2 | -2 | -2 | -4 | -3 | -4 | -7 | -5 | -5 |
min °C | 9 | 6 | 3 | 1 | 1 | 1 | 2 | -2 | -2 | -2 | -4 | -4 | -3 | -7 | -7 | -6 | -5 |
8 | 6 | 1 | -2 | 1 | 1 | 0 | -7 | -7 | -6 | -11 | -12 | -11 | -14 | -12 | -10 | -7 | |
2650 | 2500 | 2050 | 1750 | 1700 | 1800 | 1900 | 1550 | 1150 | 1200 | 950 | 900 | 1000 | 350 | 600 | 800 | 0 | |
Cloud base (m) | 3050 | 2600 | 1650 | 550 | 550 | 550 | 700 | 650 | 600 | 600 | 550 | 550 | 550 | 550 | 550 | 600 | 700 |
 | — | — | 6:24 | — | — | 6:22 | — | — | 6:20 | — | — | 6:18 | — | — | 6:16 | — | — |
 | 7:51 | — | — | 7:52 | — | — | 7:53 | — | — | 7:55 | — | — | 7:57 | — | — | 7:59 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: A light covering of new snow mostly falling on Sat afternoon. Becoming milder with light rain (total 2mm) on Sun afternoon. Freeze-thaw conditions (max 9°C on Fri afternoon, min -2°C on Sun night). Wind will be generally light.
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 Mon afternoon, min -7°C on Tue night). Winds decreasing (strong winds from the S on Tue afternoon, calm by Wed night).
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.