– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 10 am Fri 13 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 am Fri 13 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Fri 13 Mar Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryA heavy fall of snow, heaviest during Fri night. Temperatures will be below freezing (max -1°C on Sun night, min -14°C on Sat morning). Mainly fresh winds. | Days 4–6 Weather SummaryA heavy fall of snow, heaviest during Tue morning. Freeze-thaw conditions (max 2°C on Wed morning, min -1°C on Mon night). Winds decreasing (strong winds from the SW on Mon night, moderate winds from the SW by Tue night). | |||||||||||||||||
Friday 13 | Saturday 14 | Sunday 15 | Monday 16 | Tuesday 17 | Wednesday 18 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  |  |  | |  | | |  | | |  | | |  | |
mod. snow | light snow | snow shwrs | light snow | snow shwrs | some clouds | cloudy | cloudy | heavy snow | light snow | light snow | light snow | light snow | cloudy | cloudy | cloudy | light snow | mod. snow | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
6 | 2 | 6 | 4 | 1 | — | — | — | 11 | 1 | 4 | 3 | 5 | — | — | — | 2 | 6 | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -8 | -8 | -8 | -13 | -13 | -9 | -7 | -6 | -1 | 1 | 0 | 1 | 0 | 0 | 0 | 2 | 2 | 2 |
min °C | -9 | -8 | -12 | -14 | -14 | -12 | -8 | -6 | -4 | 0 | 0 | -1 | -1 | 0 | 0 | 1 | 2 | 1 |
-19 | -17 | -21 | -25 | -25 | -20 | -14 | -12 | -12 | -7 | -7 | -9 | -8 | -7 | -6 | -6 | -4 | -5 | |
650 | 750 | 350 | 350 | 500 | 0 | 750 | 800 | 1450 | 2450 | 2150 | 2000 | 2100 | 2050 | 2100 | 2450 | 2600 | 2400 | |
Cloud base (m) | 600 | 550 | 550 | 750 | 750 | 1550 | 1600 | 2050 | 600 | 700 | 600 | 700 | 600 | 600 | 850 | 600 | 550 | 600 |
 | 7:26 | — | — | 7:22 | — | — | 7:20 | — | — | 7:18 | — | — | 7:16 | — | — | 7:15 | — | — |
 | — | 7:08 | — | — | 7:10 | — | — | 7:12 | — | — | 7:14 | — | — | 7:15 | — | — | 7:16 | — |
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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 night. Temperatures will be below freezing (max -1°C on Sun night, min -14°C on Sat morning). Mainly fresh winds.
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Tue morning. Freeze-thaw conditions (max 2°C on Wed morning, min -1°C on Mon night). Winds decreasing (strong winds from the SW on Mon night, moderate winds from the SW by Tue 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.