– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 3 am Mon 16 Feb Local TimeUpdates in: hr min sUpdate imminent
Issued: 3 am Mon 16 Feb Local Time
Updates in:
Update imminent hr min s
Issued: 3 am Mon 16 Feb Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryA moderate fall of snow, heaviest on Wed afternoon. Temperatures will be well below freezing (max -10°C on Mon morning, min -13°C on Tue night). Winds decreasing (fresh winds from the S on Mon afternoon, calm by Tue morning). | Days 4–6 Weather SummaryA light covering of new snow mostly falling on Thu night. Temperatures will be below freezing (max -2°C on Sat night, min -13°C on Thu night). Wind will be generally light. | |||||||||||||||||
Monday 16 | Tuesday 17 | Wednesday 18 | Thursday 19 | Friday 20 | Saturday 21 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | | | | |  |  | |  | |  |  | | | | |
cloudy | light snow | snow shwrs | some clouds | light snow | snow shwrs | light snow | light snow | some clouds | clear | cloudy | light snow | light snow | snow shwrs | cloudy | cloudy | cloudy | some clouds | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
— | 2 | 2 | — | 1 | 1 | 1 | 4 | — | — | — | 3 | 1 | 1 | — | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -10 | -10 | -11 | -11 | -11 | -12 | -12 | -12 | -12 | -11 | -12 | -12 | -11 | -10 | -6 | -5 | -3 | -2 |
min °C | -11 | -10 | -12 | -11 | -11 | -13 | -13 | -12 | -12 | -12 | -12 | -13 | -12 | -10 | -9 | -6 | -4 | -3 |
-20 | -19 | -20 | -16 | -11 | -19 | -20 | -19 | -12 | -15 | -20 | -22 | -17 | -14 | -16 | -13 | -11 | -9 | |
750 | 700 | 300 | 650 | 700 | 350 | 400 | 450 | 150 | 450 | 500 | 200 | 450 | 550 | 350 | 1350 | 1500 | 1700 | |
Cloud base (m) | 1900 | 1500 | 500 | 550 | 1400 | 600 | 550 | 550 | 550 | 750 | 650 | 600 | 550 | 600 | 650 | 1650 | 2800 | 900 |
 | 7:13 | — | — | 7:11 | — | — | 7:09 | — | — | 7:07 | — | — | 7:05 | — | — | 7:03 | — | — |
 | — | 5:30 | — | — | 5:31 | — | — | 5:34 | — | — | 5:35 | — | — | 5:37 | — | — | 5:38 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: A moderate fall of snow, heaviest on Wed afternoon. Temperatures will be well below freezing (max -10°C on Mon morning, min -13°C on Tue night). Winds decreasing (fresh winds from the S on Mon afternoon, calm by Tue morning).
South Twin Sister Weather (Days 3-6):
A light covering of new snow mostly falling on Thu night. Temperatures will be below freezing (max -2°C on Sat night, min -13°C on Thu night). Wind will be generally light.
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.