– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 3 am Wed 17 Dec Local TimeUpdates in: hr min sUpdate imminent
Issued: 3 am Wed 17 Dec Local Time
Updates in:
Update imminent hr min s
Issued: 3 am Wed 17 Dec 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 morning. Temperatures will be below freezing (max 0°C on Thu afternoon, min -7°C on Thu night). Winds decreasing (strong winds from the SSW on Thu afternoon, light winds from the WSW by Fri night). | Days 4–6 Weather SummaryA heavy fall of snow, heaviest during Mon night. Temperatures will be below freezing (max -4°C on Sat morning, min -6°C on Mon afternoon). Winds increasing (light winds from the S on Sun afternoon, strong winds from the S by Mon morning). | |||||||||||||||||
Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | | | |  | |  | | | | | | | | |  | |
light snow | mod. snow | mod. snow | mod. snow | light snow | mod. snow | heavy snow | mod. snow | snow shwrs | light snow | light snow | mod. snow | light snow | mod. snow | mod. snow | light snow | light snow | heavy snow | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
3 | 6 | 6 | 6 | 2 | 6 | 13 | 10 | 6 | 4 | 1 | 6 | 5 | 9 | 10 | 3 | 5 | 23 | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max°C | -5 | -4 | -3 | -3 | 0 | -4 | -6 | -6 | -6 | -4 | -4 | -4 | -4 | -4 | -4 | -4 | -5 | -5 |
min°C | -5 | -4 | -4 | -3 | -1 | -7 | -6 | -6 | -6 | -5 | -5 | -5 | -4 | -4 | -4 | -5 | -6 | -6 |
-14 | -12 | -12 | -9 | -9 | -14 | -13 | -14 | -13 | -13 | -13 | -14 | -13 | -10 | -10 | -15 | -14 | -12 | |
800 | 850 | 950 | 950 | 1300 | 500 | 600 | 650 | 300 | 700 | 750 | 750 | 850 | 850 | 850 | 850 | 750 | 600 | |
Cloud base (m) | 600 | 600 | 550 | 500 | 500 | 700 | 600 | 550 | 650 | 600 | 550 | 550 | 550 | 550 | 550 | 550 | 550 | 550 |
 | 7:54 | — | — | 7:56 | — | — | 7:56 | — | — | 7:56 | — | — | 7:58 | — | — | 7:58 | — | — |
 | — | 4:12 | — | — | 4:12 | — | — | 4:13 | — | — | 4:13 | — | — | 4:14 | — | — | 4:14 | — |
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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 morning. Temperatures will be below freezing (max 0°C on Thu afternoon, min -7°C on Thu night). Winds decreasing (strong winds from the SSW on Thu afternoon, light winds from the WSW by Fri night).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Mon night. Temperatures will be below freezing (max -4°C on Sat morning, min -6°C on Mon afternoon). Winds increasing (light winds from the S on Sun afternoon, strong winds from the S by Mon morning).
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.