– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 9 pm Thu 12 Nov Local Time
Updates in:
Update imminent hr min s
Issued: 9 pm Thu 12 Nov Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryA moderate fall of snow, heaviest on Sat night. Freeze-thaw conditions (max 6°C on Thu night, min -5°C on Sun afternoon). Winds increasing (moderate winds from the S on Fri night, near gales from the SSW by Sat night). | Days 5–7 Weather SummaryMostly dry. Temperatures will be below freezing (max -2°C on Tue night, min -6°C on Sun night). Winds decreasing (fresh winds from the SSW on Sun night, calm by Tue afternoon). | |||||||||||||||
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 | |
 |  |  |  |  | | | |  |  |  | | |  | |  | |
cloudy | light rain | light snow | light snow | cloudy | light snow | light snow | light snow | snow shwrs | some clouds | some clouds | some clouds | some clouds | clear | clear | clear | |
Cloud base (m) | 5850 | 2050 | 500 | 550 | 550 | 550 | 550 | 650 | 850 | 850 | 1500 | 650 | 800 | 900 | 8750 | |
km/h | ||||||||||||||||
 |  |  |  |  |  | |||||||||||
 cm | — | — | 1 | 3 | — | 1 | 5 | 3 | 1 | — | — | — | — | — | — | — |
mm | — | 0.1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
max °C | 6 | 5 | 0 | -2 | -3 | -3 | -1 | -3 | -4 | -5 | -5 | -5 | -6 | -5 | -4 | -2 |
min °C | 5 | 3 | -1 | -3 | -3 | -3 | -2 | -3 | -5 | -6 | -6 | -5 | -6 | -6 | -5 | -3 |
chill °C | 0 | -4 | -8 | -10 | -10 | -11 | -11 | -12 | -13 | -14 | -12 | -11 | -11 | -10 | -5 | -6 |
Freezing level m | 2900 | 2700 | 2100 | 1650 | 1600 | 1700 | 1800 | 1700 | 1500 | 1300 | 1300 | 1400 | 1250 | 1150 | 1300 | 1850 |
 | — | 7:13 | — | — | 7:15 | — | — | 7:16 | — | — | 7:18 | — | — | 7:18 | — | — |
 | — | — | 4:30 | — | — | 4:29 | — | — | 4:27 | — | — | 4:25 | — | — | 4:24 | — |
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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 night. Freeze-thaw conditions (max 6°C on Thu night, min -5°C on Sun afternoon). Winds increasing (moderate winds from the S on Fri night, near gales from the SSW by Sat night).
South Twin Sister Weather (Days 3-6):
Mostly dry. Temperatures will be below freezing (max -2°C on Tue night, min -6°C on Sun night). Winds decreasing (fresh winds from the SSW on Sun night, calm by Tue afternoon).
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.