– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 9 am Sun 15 Feb Local TimeUpdates in: hr min sUpdate imminent
Issued: 9 am Sun 15 Feb Local Time
Updates in:
Update imminent hr min s
Issued: 9 am Sun 15 Feb Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryA light covering of new snow mostly falling on Mon afternoon. Temperatures will be below freezing (max -3°C on Sun afternoon, min -8°C on Tue night). Wind will be generally light. | Days 4–6 Weather SummaryA heavy fall of snow, heaviest during Wed night. Temperatures will be below freezing (max -2°C on Fri night, min -9°C on Wed night). Wind will be generally light. | |||||||||||||||||
Sunday 15 | Monday 16 | Tuesday 17 | Wednesday 18 | Thursday 19 | Friday 20 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  |  | | |  | | |  | | | | | | | |
clear | cloudy | cloudy | cloudy | light snow | snow shwrs | cloudy | light snow | some clouds | light snow | light snow | heavy snow | light snow | cloudy | cloudy | cloudy | cloudy | cloudy | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
— | — | — | — | 3 | 1 | — | 1 | — | 1 | 3 | 21 | 2 | — | — | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -4 | -3 | -4 | -6 | -6 | -5 | -6 | -6 | -6 | -8 | -8 | -7 | -9 | -9 | -9 | -7 | -5 | -2 |
min °C | -4 | -3 | -6 | -6 | -6 | -7 | -7 | -6 | -8 | -8 | -8 | -9 | -9 | -9 | -9 | -8 | -7 | -4 |
-6 | -5 | -11 | -12 | -12 | -14 | -7 | -9 | -12 | -11 | -8 | -12 | -9 | -12 | -14 | -11 | -11 | -9 | |
950 | 1050 | 700 | 650 | 600 | 100 | 600 | 750 | 200 | 400 | 500 | 300 | 250 | 300 | 0 | 300 | 600 | 800 | |
Cloud base (m) | 6750 | 2600 | 1650 | 1600 | 550 | 1900 | 1450 | 750 | 650 | 550 | 550 | 550 | 550 | 650 | 600 | 550 | 1600 | |
 | 7:15 | — | — | 7:13 | — | — | 7:11 | — | — | 7:09 | — | — | 7:07 | — | — | 7:05 | — | — |
 | — | 5:29 | — | — | 5:30 | — | — | 5:31 | — | — | 5:34 | — | — | 5:35 | — | — | 5:37 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: A light covering of new snow mostly falling on Mon afternoon. Temperatures will be below freezing (max -3°C on Sun afternoon, min -8°C on Tue night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Wed night. Temperatures will be below freezing (max -2°C on Fri night, min -9°C on Wed night). Wind will be generally light.
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.