– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 9 pm Tue 17 Feb Local TimeUpdates in: hr min sUpdate imminent
Issued: 9 pm Tue 17 Feb Local Time
Updates in:
Update imminent hr min s
Issued: 9 pm Tue 17 Feb Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryA light covering of new snow mostly falling on Wed morning. Temperatures will be well below freezing (max -6°C on Tue night, min -9°C on Thu night). Wind will be generally light. | Days 5–7 Weather SummaryA moderate fall of snow, heaviest on Mon morning. Freeze-thaw conditions (max 3°C on Sun morning, min -6°C on Fri night). Wind will be generally light. | ||||||||||||||||||
Wednesday 18 | Thursday 19 | Friday 20 | Saturday 21 | Sunday 22 | Monday 23 | ||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  |  |  | | |  | | | | | | |  | |  | |
some clouds | light snow | snow shwrs | some clouds | cloudy | clear | clear | cloudy | cloudy | cloudy | cloudy | cloudy | cloudy | cloudy | cloudy | cloudy | mod. snow | mod. snow | mod. snow | |
km/h | |||||||||||||||||||
 |  |  |  |  |  |  | |||||||||||||
— | 5 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | 10 | 6 | 9 | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -6 | -7 | -7 | -7 | -8 | -8 | -8 | -7 | -7 | -2 | -1 | 0 | 2 | 3 | 1 | 1 | -3 | -4 | -4 |
min °C | -8 | -8 | -8 | -7 | -8 | -8 | -9 | -8 | -7 | -6 | -1 | -1 | 1 | 1 | 1 | -1 | -4 | -4 | -5 |
-8 | -8 | -8 | -10 | -11 | -8 | -13 | -12 | -10 | -10 | -5 | -6 | -3 | -4 | -3 | -5 | -7 | -8 | -9 | |
300 | 400 | 450 | 0 | 250 | 450 | 0 | 300 | 600 | 200 | 1250 | 1400 | 1850 | 1850 | 1700 | 1650 | 900 | 800 | 800 | |
Cloud base (m) | 800 | 550 | 550 | 650 | 650 | 750 | 600 | 700 | 700 | 600 | 4350 | 3350 | 2650 | 2600 | 2200 | 850 | 650 | 550 | 600 |
 | — | 7:09 | — | — | 7:07 | — | — | 7:05 | — | — | 7:03 | — | — | 7:01 | — | — | 7:00 | — | — |
 | — | — | 5:34 | — | — | 5:35 | — | — | 5:37 | — | — | 5:38 | — | — | 5:39 | — | — | 5:42 | — |
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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 Wed morning. Temperatures will be well below freezing (max -6°C on Tue night, min -9°C on Thu night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
A moderate fall of snow, heaviest on Mon morning. Freeze-thaw conditions (max 3°C on Sun morning, min -6°C on Fri 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.