– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 4 pm Fri 30 Oct Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Fri 30 Oct Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryA dusting of new snow. Freeze-thaw conditions (max 3°C on Mon morning, min -5°C on Fri afternoon). Wind will be generally light. | Days 5–7 Weather SummaryA dusting of new snow. Freeze-thaw conditions (max 3°C on Mon afternoon, min -1°C on Tue night). Wind will be generally light. | ||||||||||||||||
Fri 30 | Saturday 31 | Sunday 1 | Monday 2 | Tuesday 3 | Wednesday 4 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  |  | |  | |  |  | | | | | | | |
light snow | snow shwrs | some clouds | some clouds | some clouds | clear | clear | clear | some clouds | cloudy | light snow | light snow | cloudy | some clouds | clear | some clouds | some clouds | |
Cloud base (m) | 850 | 750 | 5800 | 1800 | 4250 | 6750 | 5850 | 5100 | 2600 | 750 | 2300 | 2150 | 2050 | 3200 | 2150 | ||
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
 cm | 1 | 1 | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
max °C | -5 | -5 | -4 | -3 | -2 | -2 | -2 | 1 | 3 | 3 | 2 | 1 | 1 | 0 | -1 | 0 | 1 |
min °C | -5 | -5 | -4 | -3 | -2 | -2 | -3 | -1 | 2 | 3 | 0 | 1 | 1 | -1 | -1 | -1 | 0 |
chill °C | -12 | -12 | -9 | -8 | -6 | -5 | -7 | -5 | 1 | 0 | -6 | -4 | -3 | -5 | -5 | -5 | -4 |
Freezing level m | 1350 | 1500 | 1600 | 1750 | 1850 | 1750 | 1850 | 2350 | 3000 | 2800 | 2050 | 2350 | 2300 | 2000 | 1900 | 2200 | 2350 |
 | — | — | 7:52 | — | — | 6:54 | — | — | 7:54 | — | — | 7:56 | — | — | 7:58 | — | — |
 | 5:51 | — | — | 5:50 | — | — | 4:47 | — | — | 5:45 | — | — | 5:45 | — | — | 5:43 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: A dusting of new snow. Freeze-thaw conditions (max 3°C on Mon morning, min -5°C on Fri afternoon). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
A dusting of new snow. Freeze-thaw conditions (max 3°C on Mon afternoon, min -1°C on Tue 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.