– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 9 pm Mon 23 Feb Local TimeUpdates in: hr min sUpdate imminent
Issued: 9 pm Mon 23 Feb Local Time
Updates in:
Update imminent hr min s
Issued: 9 pm Mon 23 Feb 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 Tue night. Temperatures will be well below freezing (max -6°C on Thu morning, min -9°C on Tue night). Winds increasing (calm on Mon night, strong winds from the W by Thu afternoon). | Days 5–7 Weather SummaryA moderate fall of snow, heaviest on Fri morning. Temperatures will be below freezing (max -1°C on Sun afternoon, min -7°C on Thu night). Winds decreasing (strong winds from the W on Fri afternoon, light winds from the W by Sat night). | ||||||||||||||||||
Tuesday 24 | Wednesday 25 | Thursday 26 | Friday 27 | Saturday 28 | Sunday 1 | ||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  | |  |  | |  |  | |  | | |  |  | | | | | | |
clear | clear | clear | snow shwrs | light snow | light snow | mod. snow | cloudy | cloudy | light snow | light snow | light snow | some clouds | some clouds | clear | clear | clear | clear | clear | |
km/h | |||||||||||||||||||
 |  |  |  |  |  |  | |||||||||||||
— | — | — | 6 | 4 | 4 | 7 | — | — | 5 | 5 | 3 | — | — | — | — | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -7 | -7 | -7 | -8 | -8 | -8 | -7 | -6 | -6 | -6 | -6 | -6 | -4 | -3 | -2 | -2 | -3 | -1 | -2 |
min °C | -8 | -7 | -8 | -9 | -8 | -8 | -8 | -7 | -6 | -7 | -7 | -7 | -7 | -3 | -3 | -3 | -3 | -2 | -3 |
-11 | -11 | -16 | -17 | -17 | -17 | -17 | -16 | -16 | -16 | -17 | -17 | -15 | -8 | -8 | -8 | -8 | -8 | -10 | |
550 | 950 | 1100 | 550 | 850 | 950 | 900 | 950 | 1100 | 1000 | 950 | 900 | 700 | 1050 | 1250 | 1450 | 1400 | 1550 | 1700 | |
Cloud base (m) | 600 | 550 | 850 | 700 | 600 | 600 | 600 | 600 | 600 | 600 | 600 | 600 | 600 | 600 | 650 | 600 | 600 | 750 | 600 |
 | — | 6:58 | — | — | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — |
 | — | — | 5:43 | — | — | 5:45 | — | — | 5:46 | — | — | 5:47 | — | — | 5:50 | — | — | 5:51 | — |
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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 Tue night. Temperatures will be well below freezing (max -6°C on Thu morning, min -9°C on Tue night). Winds increasing (calm on Mon night, strong winds from the W by Thu afternoon).
South Twin Sister Weather (Days 3-6):
A moderate fall of snow, heaviest on Fri morning. Temperatures will be below freezing (max -1°C on Sun afternoon, min -7°C on Thu night). Winds decreasing (strong winds from the W on Fri afternoon, light winds from the W by Sat 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.