– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 pm Tue 12 May Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 pm Tue 12 May Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Tue 12 May Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryModerate rain (total 16mm) on Tue night. Becoming colder with heavy fall of snow, heaviest during Thu night. Freeze-thaw conditions (max 11°C on Tue afternoon, min -6°C on Fri morning). Winds increasing (light winds from the S on Tue night, strong winds from the W by Wed night). | Days 5–7 Weather SummaryA heavy fall of snow, heaviest during Fri afternoon. Temperatures will be below freezing (max -1°C on Sun afternoon, min -7°C on Fri night). Wind will be generally light. | ||||||||||||||||
Tue 12 | Wednesday 13 | Thursday 14 | Friday 15 | Saturday 16 | Sunday 17 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  | |  | |  | | | |  | | |  | |
some clouds | heavy rain | mod. snow | light snow | light snow | snow shwrs | snow shwrs | mod. snow | mod. snow | heavy snow | light snow | snow shwrs | light snow | snow shwrs | some clouds | some clouds | cloudy | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
— | — | 6 | 5 | 5 | 1 | 2 | 8 | 8 | 15 | 5 | 3 | 3 | 1 | — | — | — | |
— | 16 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | 11 | 9 | 0 | -2 | -2 | -3 | -2 | -3 | -5 | -6 | -6 | -7 | -6 | -5 | -3 | -1 | -1 |
min °C | 11 | 2 | -1 | -2 | -4 | -4 | -2 | -5 | -6 | -6 | -7 | -7 | -6 | -6 | -5 | -2 | -2 |
8 | -2 | -7 | -9 | -12 | -11 | -8 | -11 | -13 | -13 | -14 | -14 | -12 | -8 | -12 | -6 | -6 | |
3500 | 2900 | 1700 | 1750 | 1450 | 1600 | 1750 | 1450 | 1200 | 1250 | 1050 | 1200 | 1300 | 1100 | 1450 | 2050 | 1900 | |
Cloud base (m) | 850 | 550 | 600 | 600 | 800 | 1650 | 700 | 600 | 600 | 650 | 600 | 800 | 600 | 750 | 1550 | 2150 | |
 | — | — | 5:28 | — | — | 5:28 | — | — | 5:26 | — | — | 5:24 | — | — | 5:24 | — | — |
 | — | 8:37 | — | — | 8:38 | — | — | 8:39 | — | — | 8:42 | — | — | 8:43 | — | — | 8:44 |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Moderate rain (total 16mm) on Tue night. Becoming colder with heavy fall of snow, heaviest during Thu night. Freeze-thaw conditions (max 11°C on Tue afternoon, min -6°C on Fri morning). Winds increasing (light winds from the S on Tue night, strong winds from the W by Wed night).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Fri afternoon. Temperatures will be below freezing (max -1°C on Sun afternoon, min -7°C on Fri 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.