– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 10 pm Wed 11 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 pm Wed 11 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 10 pm Wed 11 Mar 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 Thu afternoon. Temperatures will be below freezing (max -3°C on Wed night, min -14°C on Sat morning). Winds decreasing (stormy winds from the WSW on Wed night, light winds from the W by Fri night). | Days 5–7 Weather SummaryA light fall of snow, heaviest on Sun night. Turning milder with light rain (total 5mm) on Mon afternoon. Freeze-thaw conditions (max 4°C on Mon night, min -12°C on Sat night). Winds increasing (light winds from the W on Sun morning, strong winds from the W by Mon night). | ||||||||||||||||||
Thursday 12 | Friday 13 | Saturday 14 | Sunday 15 | Monday 16 | Tuesday 17 | ||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | | |  |  |  |  |  | | | | |  |  | |  |  | |
heavy snow | light snow | heavy snow | heavy snow | light snow | cloudy | snow shwrs | snow shwrs | some clouds | some clouds | cloudy | light snow | heavy snow | cloudy | light rain | rain shwrs | some clouds | rain shwrs | cloudy | |
km/h | |||||||||||||||||||
 |  |  |  |  |  |  | |||||||||||||
12 | 2 | 11 | 18 | 2 | — | 1 | 3 | — | — | — | 1 | 14 | — | — | — | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 2 | — | 0.2 | — | |
max °C | -3 | -12 | -11 | -10 | -9 | -9 | -9 | -13 | -13 | -9 | -7 | -6 | -1 | 1 | 2 | 4 | 3 | 4 | 4 |
min °C | -11 | -12 | -12 | -11 | -10 | -9 | -13 | -14 | -13 | -12 | -8 | -7 | -4 | 0 | 2 | 2 | 3 | 4 | 3 |
-25 | -25 | -24 | -21 | -19 | -17 | -21 | -24 | -23 | -21 | -13 | -13 | -12 | -6 | -4 | -5 | -3 | -2 | -3 | |
650 | 500 | 500 | 350 | 600 | 650 | 0 | 400 | 500 | 0 | 700 | 700 | 1350 | 2800 | 3150 | 2950 | 2950 | 2900 | 2700 | |
Cloud base (m) | 600 | 600 | 600 | 600 | 600 | 550 | 600 | 700 | 750 | 700 | 2350 | 1000 | 600 | 600 | 600 | 600 | 950 | 750 | 3450 |
 | — | 7:28 | — | — | 7:26 | — | — | 7:22 | — | — | 7:20 | — | — | 7:18 | — | — | 7:16 | — | — |
 | — | — | 7:07 | — | — | 7:08 | — | — | 7:10 | — | — | 7:12 | — | — | 7:14 | — | — | 7:15 | — |
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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 Thu afternoon. Temperatures will be below freezing (max -3°C on Wed night, min -14°C on Sat morning). Winds decreasing (stormy winds from the WSW on Wed night, light winds from the W by Fri night).
South Twin Sister Weather (Days 3-6):
A light fall of snow, heaviest on Sun night. Turning milder with light rain (total 5mm) on Mon afternoon. Freeze-thaw conditions (max 4°C on Mon night, min -12°C on Sat night). Winds increasing (light winds from the W on Sun morning, strong winds from the W by Mon 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.