– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 9 pm Wed 25 Feb Local TimeUpdates in: hr min sUpdate imminent
Issued: 9 pm Wed 25 Feb Local Time
Updates in:
Update imminent hr min s
Issued: 9 pm Wed 25 Feb Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryA moderate fall of snow, heaviest on Wed night. Temperatures will be below freezing (max -1°C on Sat afternoon, min -7°C on Wed night). Winds decreasing (strong winds from the W on Thu afternoon, light winds from the NNW by Sat afternoon). | Days 5–7 Weather SummaryMostly dry. Freeze-thaw conditions (max 2°C on Tue morning, min -1°C on Sat night). Winds increasing (calm on Sat night, fresh winds from the NW by Sun night). | ||||||||||||||||||
Thursday 26 | Friday 27 | Saturday 28 | Sunday 1 | Monday 2 | Tuesday 3 | ||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  | | | |  |  |  | |  | | | | |  |  | | |  | |
light snow | cloudy | cloudy | light snow | cloudy | light snow | some clouds | clear | clear | clear | clear | clear | clear | clear | some clouds | cloudy | cloudy | cloudy | heavy snow | |
km/h | |||||||||||||||||||
 |  |  |  |  |  |  | |||||||||||||
4 | — | — | 5 | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | 13 | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -6 | -5 | -6 | -6 | -5 | -6 | -4 | -3 | -1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 0 | -4 |
min °C | -7 | -5 | -6 | -6 | -6 | -6 | -6 | -4 | -2 | -1 | -1 | 0 | 0 | 0 | 0 | 0 | 1 | -1 | -6 |
-16 | -14 | -16 | -15 | -15 | -15 | -14 | -10 | -7 | -4 | -4 | -2 | -4 | -6 | -4 | -5 | -2 | -8 | -12 | |
950 | 1100 | 1150 | 1050 | 1000 | 1000 | 750 | 950 | 1250 | 1900 | 2050 | 2000 | 2150 | 2200 | 2200 | 2150 | 2400 | 2200 | 1200 | |
Cloud base (m) | 600 | 600 | 650 | 600 | 600 | 600 | 600 | 600 | 700 | 600 | 9000 | 1550 | 7750 | 6950 | 6150 | 550 | |||
 | — | 6:54 | — | — | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — | 6:47 | — | — | 6:45 | — | — |
 | — | — | 5:46 | — | — | 5:47 | — | — | 5:50 | — | — | 5:51 | — | — | 5:52 | — | — | 5:54 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: A moderate fall of snow, heaviest on Wed night. Temperatures will be below freezing (max -1°C on Sat afternoon, min -7°C on Wed night). Winds decreasing (strong winds from the W on Thu afternoon, light winds from the NNW by Sat afternoon).
South Twin Sister Weather (Days 3-6):
Mostly dry. Freeze-thaw conditions (max 2°C on Tue morning, min -1°C on Sat night). Winds increasing (calm on Sat night, fresh winds from the NW by Sun 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.