– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 pm Sun 08 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 pm Sun 08 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Sun 08 Mar 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 Mon afternoon. Temperatures will be below freezing (max -3°C on Sun afternoon, min -9°C on Sun night). Winds increasing (light winds from the S on Tue morning, strong winds from the S by Tue night). | Days 5–7 Weather SummaryA heavy fall of snow, heaviest during Thu night. Temperatures will be below freezing (max 0°C on Wed afternoon, min -7°C on Thu morning). Winds decreasing (near gales from the W on Wed night, light winds from the SW by Fri night). | ||||||||||||||||
Sun 8 | Monday 9 | Tuesday 10 | Wednesday 11 | Thursday 12 | Friday 13 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  | |  |  | |  | | | | |  |  | |
some clouds | mod. snow | light snow | heavy snow | snow shwrs | snow shwrs | light snow | heavy snow | mod. snow | mod. snow | light snow | mod. snow | light snow | heavy snow | light snow | cloudy | some clouds | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
— | 6 | 1 | 12 | 8 | 2 | 3 | 14 | 10 | 8 | 5 | 6 | 4 | 19 | 2 | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -3 | -6 | -8 | -8 | -8 | -8 | -6 | -4 | -3 | 0 | 0 | -6 | -7 | -5 | -7 | -6 | -6 |
min °C | -4 | -9 | -9 | -8 | -9 | -9 | -8 | -6 | -4 | -2 | -6 | -7 | -7 | -6 | -7 | -6 | -6 |
-12 | -16 | -16 | -16 | -17 | -15 | -16 | -14 | -13 | -10 | -17 | -16 | -15 | -12 | -13 | -10 | -9 | |
950 | 350 | 450 | 450 | 0 | 450 | 550 | 700 | 950 | 1600 | 700 | 500 | 550 | 600 | 600 | 600 | 0 | |
Cloud base (m) | 1700 | 600 | 850 | 600 | 600 | 600 | 850 | 600 | 550 | 550 | 600 | 600 | 650 | 600 | 700 | 650 | 700 |
 | — | — | 7:33 | — | — | 7:31 | — | — | 7:30 | — | — | 7:28 | — | — | 7:26 | — | — |
 | — | 8:01 | — | 7:02 | — | — | 7:05 | — | — | 7:06 | — | — | 7:07 | — | — | 7:08 | — |
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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 Mon afternoon. Temperatures will be below freezing (max -3°C on Sun afternoon, min -9°C on Sun night). Winds increasing (light winds from the S on Tue morning, strong winds from the S by Tue night).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Thu night. Temperatures will be below freezing (max 0°C on Wed afternoon, min -7°C on Thu morning). Winds decreasing (near gales from the W on Wed night, light winds from the SW by Fri night).
This table gives the weather forecast for South Twin Sister at the specific elevation of 1500 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.