– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 9 am Fri 02 Jan Local TimeUpdates in: hr min sUpdate imminent
Issued: 9 am Fri 02 Jan Local Time
Updates in:
Update imminent hr min s
Issued: 9 am Fri 02 Jan 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 Sat morning. Temperatures will be below freezing (max 0°C on Fri night, min -9°C on Sun night). Winds increasing (light winds from the SSW on Fri morning, gales from the S by Sat night). | Days 4–6 Weather SummaryA heavy fall of snow, heaviest during Tue afternoon. Temperatures will be well below freezing (max -8°C on Tue morning, min -11°C on Tue night). Winds decreasing (strong winds from the WSW on Tue night, light winds from the W by Wed night). | |||||||||||||||||
Friday 2 | Saturday 3 | Sunday 4 | Monday 5 | Tuesday 6 | Wednesday 7 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | |  |  | | |  |  | | | | | | | | |
cloudy | some clouds | light snow | mod. snow | some clouds | mod. snow | light snow | cloudy | mod. snow | heavy snow | snow shwrs | light snow | mod. snow | heavy snow | mod. snow | mod. snow | light snow | mod. snow | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
— | — | 2 | 10 | — | 8 | 3 | — | 8 | 11 | 4 | 4 | 8 | 20 | 9 | 6 | 5 | 7 | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -2 | -1 | 0 | -2 | -3 | -2 | -5 | -7 | -7 | -9 | -9 | -10 | -8 | -8 | -10 | -10 | -10 | -11 |
min °C | -2 | -2 | -1 | -3 | -3 | -4 | -6 | -7 | -9 | -9 | -10 | -10 | -9 | -9 | -11 | -10 | -10 | -11 |
-7 | -8 | -8 | -12 | -11 | -15 | -15 | -16 | -17 | -16 | -18 | -19 | -16 | -19 | -20 | -16 | -17 | -16 | |
1600 | 1800 | 2200 | 1700 | 1650 | 1450 | 1400 | 1150 | 1050 | 850 | 800 | 500 | 600 | 700 | 500 | 600 | 550 | 400 | |
Cloud base (m) | 650 | 550 | 600 | 550 | 500 | 1750 | 550 | 700 | 550 | 550 | 550 | 600 | 550 | 550 | 550 | 550 | 600 | 550 |
 | 8:00 | — | — | 8:00 | — | — | 8:00 | — | — | 8:00 | — | — | 7:58 | — | — | 7:58 | — | — |
 | — | 4:22 | — | — | 4:23 | — | — | 4:24 | — | — | 4:27 | — | — | 4:28 | — | — | 4:29 | — |
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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 Sat morning. Temperatures will be below freezing (max 0°C on Fri night, min -9°C on Sun night). Winds increasing (light winds from the SSW on Fri morning, gales from the S by Sat night).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Tue afternoon. Temperatures will be well below freezing (max -8°C on Tue morning, min -11°C on Tue night). Winds decreasing (strong winds from the WSW on Tue night, light winds from the W by Wed 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.