– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 10 pm Tue 21 Oct Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 pm Tue 21 Oct Local Time
Updates in:
Update imminent hr min s
Issued: 10 pm Tue 21 Oct 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 Fri morning. Freeze-thaw conditions (max 8°C on Tue night, min -2°C on Wed night). Winds increasing (light winds from the SSW on Tue night, gales from the S by Thu night). | Days 5–7 Weather SummaryA heavy fall of snow, heaviest during Sat night. Temperatures will be below freezing (max -1°C on Fri night, min -8°C on Sun morning). Winds decreasing (gales from the S on Fri night, light winds from the WSW by Mon afternoon). | ||||||||||||||||||
Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | ||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  | |  |  |  | | | |  |  | | | | |  | |
clear | some clouds | light snow | snow shwrs | cloudy | some clouds | light snow | heavy snow | mod. snow | snow shwrs | some clouds | light snow | heavy snow | snow shwrs | snow shwrs | snow shwrs | snow shwrs | some clouds | cloudy | |
km/h | |||||||||||||||||||
 |  |  |  |  |  |  | |||||||||||||
— | — | 2 | 1 | — | — | 3 | 11 | 6 | 10 | — | 3 | 29 | 3 | 4 | 1 | 4 | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max°C | 8 | 7 | 2 | -1 | -1 | 2 | 2 | -1 | -1 | -1 | -2 | -4 | -5 | -7 | -7 | -7 | -7 | -7 | -2 |
min°C | 5 | 5 | -1 | -2 | -1 | 1 | 0 | -1 | -2 | -4 | -3 | -4 | -7 | -8 | -7 | -8 | -8 | -7 | -6 |
2 | -2 | -8 | -8 | -7 | -5 | -8 | -10 | -9 | -11 | -8 | -12 | -18 | -17 | -14 | -15 | -15 | -12 | -10 | |
3300 | 2800 | 2050 | 1900 | 1950 | 2500 | 2050 | 1800 | 1800 | 1600 | 1850 | 1400 | 1100 | 1150 | 1200 | 800 | 1050 | 1100 | 1650 | |
Cloud base (m) | 8750 | 5600 | 800 | 1550 | 2350 | 4800 | 1800 | 550 | 500 | 600 | 600 | 700 | 550 | 700 | 1600 | 900 | 650 | 800 | 950 |
 | — | 7:37 | — | — | 7:39 | — | — | 7:41 | — | — | 7:43 | — | — | 7:43 | — | — | 7:46 | — | — |
 | — | — | 6:05 | — | — | 6:02 | — | — | 6:01 | — | — | 6:00 | — | — | 5:58 | — | — | 5:55 | — |
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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. Freeze-thaw conditions (max 8°C on Tue night, min -2°C on Wed night). Winds increasing (light winds from the SSW on Tue night, gales from the S by Thu night).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Sat night. Temperatures will be below freezing (max -1°C on Fri night, min -8°C on Sun morning). Winds decreasing (gales from the S on Fri night, light winds from the WSW by Mon afternoon).
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.