– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 4 pm Wed 28 Oct Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Wed 28 Oct 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 Fri night. Temperatures will be below freezing (max -4°C on Thu night, min -7°C on Wed afternoon). Wind will be generally light. | Days 5–7 Weather SummaryMostly dry. Freeze-thaw conditions (max 7°C on Tue morning, min -5°C on Sat afternoon). Wind will be generally light. | ||||||||||||||||
Wed 28 | Thursday 29 | Friday 30 | Saturday 31 | Sunday 1 | Monday 2 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  | |  | | | | |  | | | | | |
snow shwrs | light snow | light snow | some clouds | some clouds | cloudy | cloudy | heavy snow | some clouds | cloudy | some clouds | some clouds | clear | some clouds | some clouds | cloudy | some clouds | |
Cloud base (m) | 850 | 650 | 650 | 900 | 1550 | 2400 | 1750 | 600 | 650 | 750 | 1800 | 850 | 800 | 650 | 4200 | 5000 | 4900 |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
 cm | 2 | 1 | 1 | — | — | — | — | 12 | — | — | — | — | — | — | — | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
max °C | -6 | -6 | -6 | -5 | -4 | -4 | -4 | -5 | -5 | -5 | -4 | -5 | -3 | 4 | 5 | 5 | 6 |
min °C | -7 | -7 | -7 | -6 | -5 | -4 | -4 | -5 | -5 | -5 | -5 | -5 | -4 | -1 | 5 | 5 | 5 |
chill °C | -13 | -14 | -14 | -12 | -10 | -10 | -9 | -7 | -10 | -11 | -10 | -9 | -7 | -4 | 3 | 1 | 1 |
Freezing level m | 1250 | 1150 | 1200 | 1450 | 1500 | 1550 | 1400 | 1200 | 1350 | 1400 | 1500 | 1250 | 1400 | 2850 | 3300 | 3150 | 3400 |
 | — | — | 7:48 | — | — | 7:50 | — | — | 7:52 | — | — | 6:54 | — | — | 7:54 | — | — |
 | 5:54 | — | — | 5:52 | — | — | 5:51 | — | — | 5:50 | — | — | 4:47 | — | — | 5:45 | — |
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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 Fri night. Temperatures will be below freezing (max -4°C on Thu night, min -7°C on Wed afternoon). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Mostly dry. Freeze-thaw conditions (max 7°C on Tue morning, min -5°C on Sat afternoon). 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.