– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 3 pm Sat 21 Feb Local TimeUpdates in: hr min sUpdate imminent
Issued: 3 pm Sat 21 Feb Local Time
Updates in:
Update imminent hr min s
Issued: 3 pm Sat 21 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 Sun night. Temperatures will be below freezing (max -2°C on Sat night, min -7°C on Mon morning). Winds decreasing (strong winds from the SSW on Sun night, light winds from the W by Mon night). | Days 5–7 Weather SummaryA heavy fall of snow, heaviest during Tue afternoon. Temperatures will be below freezing (max -5°C on Tue afternoon, min -10°C on Tue night). Winds increasing (light winds from the SW on Tue afternoon, strong winds from the WSW by Thu night). | ||||||||||||||||
Sat 21 | Sunday 22 | Monday 23 | Tuesday 24 | Wednesday 25 | Thursday 26 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  | | |  |  | |  |  | |  | |  | | | |  | |
light snow | cloudy | light snow | light snow | mod. snow | mod. snow | light snow | some clouds | some clouds | mod. snow | heavy snow | light snow | snow shwrs | some clouds | some clouds | some clouds | light snow | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
2 | — | 3 | 2 | 6 | 8 | 3 | — | — | 10 | 12 | 3 | 2 | — | — | — | 4 | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -4 | -2 | -3 | -5 | -5 | -6 | -7 | -5 | -4 | -5 | -9 | -8 | -8 | -7 | -8 | -8 | -7 |
min °C | -4 | -3 | -5 | -6 | -6 | -7 | -7 | -7 | -5 | -6 | -10 | -8 | -8 | -8 | -8 | -8 | -8 |
-11 | -10 | -14 | -15 | -14 | -14 | -13 | -13 | -12 | -13 | -21 | -17 | -17 | -16 | -17 | -17 | -18 | |
1400 | 1800 | 1650 | 1150 | 1200 | 1150 | 1050 | 650 | 1300 | 1050 | 550 | 800 | 850 | 600 | 800 | 900 | 750 | |
Cloud base (m) | 1700 | 2150 | 850 | 650 | 600 | 600 | 600 | 1450 | 550 | 700 | 600 | 600 | 600 | 650 | 700 | 600 | 700 |
 | — | — | 7:01 | — | — | 7:00 | — | — | 6:58 | — | — | 6:56 | — | — | 6:54 | — | — |
 | 5:38 | — | — | 5:39 | — | — | 5:42 | — | — | 5:43 | — | — | 5:45 | — | — | 5:46 | — |
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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 Sun night. Temperatures will be below freezing (max -2°C on Sat night, min -7°C on Mon morning). Winds decreasing (strong winds from the SSW on Sun night, light winds from the W by Mon night).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Tue afternoon. Temperatures will be below freezing (max -5°C on Tue afternoon, min -10°C on Tue night). Winds increasing (light winds from the SW on Tue afternoon, strong winds from the WSW by Thu 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.