– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 4 pm Sat 31 Oct Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Sat 31 Oct Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryMostly dry. Freeze-thaw conditions (max 3°C on Mon morning, min -4°C on Sat afternoon). Wind will be generally light. | Days 5–7 Weather SummaryA moderate fall of snow, heaviest on Thu night. Temperatures will be below freezing (max -1°C on Tue afternoon, min -3°C on Fri morning). Winds increasing (light winds from the W on Tue night, fresh winds from the WSW by Thu night). | ||||||||||||||||
Sat 31 | Sunday 1 | Monday 2 | Tuesday 3 | Wednesday 4 | Thursday 5 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  | |  |  | |  | | | |  | | |  | |
some clouds | some clouds | clear | clear | clear | some clouds | cloudy | cloudy | cloudy | light snow | cloudy | cloudy | cloudy | light snow | some clouds | cloudy | mod. snow | |
Cloud base (m) | 5650 | 5300 | 6250 | 5250 | 4500 | 3000 | 1900 | 600 | 600 | 850 | 650 | 600 | 900 | 1600 | 600 | ||
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
 cm | — | — | — | — | — | — | — | — | — | 1 | — | — | — | 2 | — | — | 6 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
max °C | -3 | -2 | -2 | -1 | 2 | 3 | 3 | 3 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 |
min °C | -4 | -2 | -2 | -2 | 0 | 3 | 3 | 0 | -2 | -1 | -2 | -1 | -1 | -2 | -1 | -1 | -2 |
chill °C | -9 | -6 | -5 | -6 | -4 | 1 | 0 | -5 | -7 | -6 | -6 | -5 | -7 | -10 | -6 | -7 | -9 |
Freezing level m | 1700 | 1900 | 1800 | 2000 | 2950 | 3100 | 2900 | 2300 | 1700 | 1850 | 1750 | 2000 | 1900 | 1850 | 1900 | 1900 | 1700 |
 | — | — | 6:54 | — | — | 7:54 | — | — | 7:56 | — | — | 7:58 | — | — | 8:00 | — | — |
 | 5:50 | — | — | 4:47 | — | — | 5:45 | — | — | 5:45 | — | — | 5:43 | — | — | 5:42 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Mostly dry. Freeze-thaw conditions (max 3°C on Mon morning, min -4°C on Sat afternoon). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
A moderate fall of snow, heaviest on Thu night. Temperatures will be below freezing (max -1°C on Tue afternoon, min -3°C on Fri morning). Winds increasing (light winds from the W on Tue night, fresh winds from the WSW by Thu 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.