– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 10 am Sat 24 Oct Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Sat 24 Oct 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 Sat afternoon. Freeze-thaw conditions (max 1°C on Sun night, min -3°C on Mon night). Winds decreasing (fresh winds from the S on Sat night, calm by Mon morning). | Days 4–6 Weather SummaryA heavy fall of snow, heaviest during Wed night. Temperatures will be below freezing (max -3°C on Tue morning, min -7°C on Wed night). Wind will be generally light. | |||||||||||||||||
Saturday 24 | Sunday 25 | Monday 26 | Tuesday 27 | Wednesday 28 | Thursday 29 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | | |  |  | | | | |  | |  | | | | | |
cloudy | light snow | light snow | light snow | cloudy | some clouds | some clouds | some clouds | some clouds | cloudy | light snow | heavy snow | light snow | snow shwrs | heavy snow | light snow | light snow | some clouds | |
Cloud base (m) | 2650 | 1700 | 2000 | 600 | 850 | 2650 | 3000 | 3050 | 1550 | 700 | 600 | 550 | 550 | 650 | 550 | 550 | 550 | 600 |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | 3 | 4 | 3 | — | — | — | — | — | — | 2 | 12 | 1 | 2 | 14 | 5 | 2 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
max °C | 0 | -2 | 0 | -1 | -1 | 1 | 1 | 0 | -1 | -3 | -4 | -5 | -6 | -6 | -6 | -7 | -7 | -7 |
min °C | -1 | -2 | -2 | -2 | -1 | 0 | 1 | -1 | -3 | -4 | -4 | -6 | -6 | -6 | -7 | -7 | -7 | -7 |
chill °C | -7 | -8 | -7 | -9 | -7 | -5 | -1 | -4 | -7 | -9 | -9 | -14 | -11 | -11 | -15 | -13 | -10 | -7 |
Freezing level m | 1900 | 1400 | 2000 | 1950 | 2000 | 2250 | 2250 | 2000 | 1650 | 1500 | 1450 | 1200 | 1200 | 1250 | 1100 | 1050 | 1050 | 900 |
 | 7:41 | — | — | 7:43 | — | — | 7:43 | — | — | 7:46 | — | — | 7:47 | — | — | 7:48 | — | — |
 | — | 6:01 | — | — | 6:00 | — | — | 5:58 | — | — | 5:55 | — | — | 5:54 | — | — | 5:52 | — |
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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 Sat afternoon. Freeze-thaw conditions (max 1°C on Sun night, min -3°C on Mon night). Winds decreasing (fresh winds from the S on Sat night, calm by Mon morning).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Wed night. Temperatures will be below freezing (max -3°C on Tue morning, min -7°C on Wed 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.