– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 3 pm Tue 30 Dec Local TimeUpdates in: hr min sUpdate imminent
Issued: 3 pm Tue 30 Dec Local Time
Updates in:
Update imminent hr min s
Issued: 3 pm Tue 30 Dec 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 5°C on Tue afternoon, min -3°C on Thu night). Wind will be generally light. | Days 5–7 Weather SummaryA heavy fall of snow, heaviest during Sun night. Temperatures will be below freezing (max 0°C on Fri night, min -4°C on Mon morning). Winds increasing (light winds from the SSW on Fri night, near gales from the SSW by Sun morning). | ||||||||||||||||
Tue 30 | Wednesday 31 | Thursday 1 | Friday 2 | Saturday 3 | Sunday 4 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  | |  |  |  | |  |  | | | | |  | |
clear | some clouds | some clouds | clear | clear | some clouds | cloudy | light snow | light snow | light snow | cloudy | snow shwrs | snow shwrs | light snow | light snow | cloudy | mod. snow | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
— | — | — | — | — | — | — | 3 | 1 | 1 | — | 1 | 3 | 4 | 4 | — | 8 | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | 5 | 4 | 3 | 3 | 3 | 2 | 1 | -2 | -1 | -1 | 0 | -1 | -3 | -2 | -3 | -2 | -2 |
min °C | 5 | 3 | 3 | 3 | 3 | 2 | 0 | -3 | -1 | -1 | -1 | -2 | -3 | -3 | -3 | -2 | -3 |
2 | -1 | -1 | -1 | 0 | -2 | -4 | -9 | -7 | -6 | -5 | -9 | -9 | -12 | -13 | -10 | -10 | |
3200 | 3050 | 2900 | 2800 | 2750 | 2600 | 2350 | 1350 | 1750 | 1900 | 2100 | 1850 | 1550 | 1700 | 1550 | 1750 | 1600 | |
Cloud base (m) | 600 | 5800 | 5650 | 5600 | 5400 | 6650 | 4900 | 1700 | 550 | 550 | 1550 | 1450 | 700 | 750 | 550 | 550 | 550 |
 | — | — | 8:00 | — | — | 8:00 | — | — | 8:00 | — | — | 8:00 | — | — | 8:00 | — | — |
 | 4:20 | — | — | 4:21 | — | — | 4:22 | — | — | 4:22 | — | — | 4:23 | — | — | 4:24 | — |
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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 5°C on Tue afternoon, min -3°C on Thu night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Sun night. Temperatures will be below freezing (max 0°C on Fri night, min -4°C on Mon morning). Winds increasing (light winds from the SSW on Fri night, near gales from the SSW by Sun morning).
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.