– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 3 pm Fri 13 Feb Local TimeUpdates in: hr min sUpdate imminent
Issued: 3 pm Fri 13 Feb Local Time
Updates in:
Update imminent hr min s
Issued: 3 pm Fri 13 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 Fri afternoon. Temperatures will be well below freezing (max -6°C on Fri afternoon, min -10°C on Sat morning). Winds decreasing (fresh winds from the SSW on Fri afternoon, calm by Sat night). | Days 5–7 Weather SummaryA heavy fall of snow, heaviest during Thu morning. Temperatures will be well below freezing (max -9°C on Mon afternoon, min -13°C on Wed night). Winds increasing (calm on Tue afternoon, fresh winds from the WSW by Wed night). | ||||||||||||||||
Fri 13 | Saturday 14 | Sunday 15 | Monday 16 | Tuesday 17 | Wednesday 18 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  | | | |  |  |  | | | | |  | |
heavy snow | mod. snow | mod. snow | light snow | some clouds | clear | clear | some clouds | mod. snow | snow shwrs | cloudy | cloudy | snow shwrs | cloudy | light snow | snow shwrs | heavy snow | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
12 | 9 | 7 | 1 | — | — | — | — | 7 | 2 | — | — | 1 | — | 1 | 1 | 11 | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -6 | -7 | -9 | -8 | -7 | -7 | -8 | -7 | -8 | -9 | -9 | -11 | -10 | -11 | -11 | -11 | -11 |
min °C | -6 | -9 | -10 | -9 | -8 | -8 | -8 | -8 | -9 | -9 | -11 | -11 | -10 | -11 | -11 | -11 | -13 |
-14 | -16 | -17 | -14 | -11 | -14 | -14 | -13 | -17 | -17 | -17 | -17 | -14 | -11 | -16 | -19 | -24 | |
1050 | 850 | 750 | 850 | 0 | 900 | 900 | 0 | 650 | 700 | 350 | 600 | 700 | 0 | 500 | 550 | 250 | |
Cloud base (m) | 550 | 550 | 600 | 600 | 600 | 800 | 550 | 550 | 1300 | 500 | 700 | 650 | 750 | 600 | 550 | 550 | 550 |
 | — | — | 7:16 | — | — | 7:15 | — | — | 7:13 | — | — | 7:11 | — | — | 7:09 | — | — |
 | 5:25 | — | — | 5:27 | — | — | 5:29 | — | — | 5:30 | — | — | 5:31 | — | — | 5:34 | — |
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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 afternoon. Temperatures will be well below freezing (max -6°C on Fri afternoon, min -10°C on Sat morning). Winds decreasing (fresh winds from the SSW on Fri afternoon, calm by Sat night).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Thu morning. Temperatures will be well below freezing (max -9°C on Mon afternoon, min -13°C on Wed night). Winds increasing (calm on Tue afternoon, fresh winds from the WSW by Wed 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.