– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 9 am Sat 21 Feb Local TimeUpdates in: hr min sUpdate imminent
Issued: 9 am Sat 21 Feb Local Time
Updates in:
Update imminent hr min s
Issued: 9 am Sat 21 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 Sun morning. Freeze-thaw conditions (max 1°C on Sat night, min -4°C on Mon night). Winds decreasing (fresh winds from the S on Sun night, calm by Mon night). | Days 4–6 Weather SummaryA heavy fall of snow, heaviest during Thu night. Temperatures will be below freezing (max -3°C on Thu morning, min -6°C on Tue afternoon). Winds increasing (calm on Tue morning, fresh winds from the SW by Thu night). | |||||||||||||||||
Saturday 21 | Sunday 22 | Monday 23 | Tuesday 24 | Wednesday 25 | Thursday 26 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  | |  | | | |  |  | |  | | |  | |  | | |
light snow | light snow | light snow | light snow | snow shwrs | light snow | light snow | light snow | snow shwrs | some clouds | some clouds | mod. snow | light snow | light snow | cloudy | some clouds | cloudy | mod. snow | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
1 | 2 | 1 | 3 | 1 | 4 | 2 | 3 | 1 | — | — | 6 | 4 | 1 | — | — | — | 9 | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -1 | -1 | 1 | 0 | -1 | 0 | -1 | -3 | -4 | -4 | -5 | -5 | -5 | -4 | -4 | -3 | -3 | -3 |
min °C | -3 | -2 | 0 | -2 | -1 | -1 | -2 | -3 | -4 | -4 | -6 | -6 | -5 | -5 | -4 | -4 | -4 | -4 |
-8 | -7 | -5 | -9 | -8 | -8 | -5 | -3 | -7 | -4 | -11 | -13 | -11 | -9 | -9 | -10 | -10 | -12 | |
1350 | 1150 | 1600 | 1500 | 1250 | 1450 | 1300 | 1100 | 800 | 900 | 800 | 600 | 750 | 850 | 450 | 950 | 1000 | 950 | |
Cloud base (m) | 2500 | 1500 | 2000 | 850 | 600 | 600 | 600 | 750 | 550 | 550 | 550 | 600 | 650 | 600 | 600 | 600 | 850 | 600 |
 | 7:03 | — | — | 7:01 | — | — | 7:00 | — | — | 6:58 | — | — | 6:56 | — | — | 6:54 | — | — |
 | — | 5:38 | — | — | 5:39 | — | — | 5:42 | — | — | 5:43 | — | — | 5:45 | — | — | 5:46 | — |
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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 Sun morning. Freeze-thaw conditions (max 1°C on Sat night, min -4°C on Mon night). Winds decreasing (fresh winds from the S on Sun night, calm by Mon night).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Thu night. Temperatures will be below freezing (max -3°C on Thu morning, min -6°C on Tue afternoon). Winds increasing (calm on Tue morning, fresh winds from the SW by Thu night).
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.