– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 9 pm Sun 21 Dec Local TimeUpdates in: hr min sUpdate imminent
Issued: 9 pm Sun 21 Dec Local Time
Updates in:
Update imminent hr min s
Issued: 9 pm Sun 21 Dec 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 -1°C on Wed morning, min -10°C on Sun night). Winds increasing (light winds from the S on Tue morning, gales from the S by Wed morning). | Days 5–7 Weather SummaryA heavy fall of snow, heaviest during Thu night. Temperatures will be below freezing (max -3°C on Thu morning, min -7°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Monday 22 | Tuesday 23 | Wednesday 24 | Thursday 25 | Friday 26 | Saturday 27 | ||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  |  | | |  |  | |  | | |  | | |  | |
snow shwrs | light snow | mod. snow | mod. snow | clear | cloudy | light snow | mod. snow | mod. snow | some clouds | some clouds | light snow | heavy snow | light snow | some clouds | clear | clear | clear | cloudy | |
km/h | |||||||||||||||||||
 |  |  |  |  |  |  | |||||||||||||
28 | 4 | 6 | 8 | — | — | 1 | 6 | 7 | — | — | 4 | 20 | 2 | — | — | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -8 | -9 | -8 | -9 | -9 | -6 | -2 | -1 | -6 | -4 | -3 | -4 | -6 | -7 | -7 | -7 | -6 | -5 | -1 |
min °C | -10 | -9 | -8 | -10 | -9 | -8 | -5 | -3 | -7 | -6 | -3 | -5 | -7 | -7 | -7 | -7 | -7 | -6 | -4 |
-18 | -19 | -20 | -20 | -16 | -16 | -12 | -13 | -16 | -11 | -9 | -10 | -14 | -14 | -14 | -14 | -13 | -11 | -9 | |
700 | 750 | 750 | 650 | 650 | 950 | 1600 | 1850 | 1150 | 1000 | 1600 | 1250 | 950 | 850 | 850 | 0 | 500 | 650 | 0 | |
Cloud base (m) | 550 | 650 | 550 | 550 | 600 | 1800 | 1650 | 650 | 550 | 550 | 1950 | 750 | 550 | 550 | 550 | 600 | 650 | 600 | 650 |
 | — | 7:58 | — | — | 7:58 | — | — | 7:58 | — | — | 7:58 | — | — | 8:00 | — | — | 8:00 | — | — |
 | — | — | 4:14 | — | — | 4:15 | — | — | 4:15 | — | — | 4:15 | — | — | 4:16 | — | — | 4:17 | — |
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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 -1°C on Wed morning, min -10°C on Sun night). Winds increasing (light winds from the S on Tue morning, gales from the S by Wed morning).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Thu night. Temperatures will be below freezing (max -3°C on Thu morning, min -7°C on Thu night). Wind will be generally light.
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.