– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 4 am Sat 10 Oct Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Sat 10 Oct Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryA dusting of new snow. Freeze-thaw conditions (max 4°C on Mon night, min -4°C on Sat morning). Wind will be generally light. | Days 4–6 Weather SummarySome drizzle, heaviest during Wed morning. Very mild (max 10°C on Thu night, min 3°C on Tue morning). Wind will be generally light. | |||||||||||||||||
Saturday 10 | Sunday 11 | Monday 12 | Tuesday 13 | Wednesday 14 | Thursday 15 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | | | | |  |  | |  |  |  | | | | | |
some clouds | snow shwrs | clear | clear | clear | clear | clear | clear | some clouds | cloudy | cloudy | light rain | light rain | rain shwrs | clear | clear | clear | clear | |
Cloud base (m) | 1550 | 1550 | 9000 | 2500 | 2400 | 1800 | 950 | 800 | 650 | 6650 | 8550 | |||||||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 0.1 | 0.9 | 0.4 | — | — | — | — |
max °C | -4 | -2 | -1 | -1 | 1 | 2 | 2 | 3 | 4 | 3 | 3 | 3 | 4 | 4 | 5 | 6 | 8 | 10 |
min °C | -4 | -3 | -2 | -1 | 0 | 1 | 2 | 3 | 3 | 3 | 3 | 3 | 4 | 3 | 4 | 5 | 7 | 9 |
chill °C | -10 | -8 | -8 | -6 | -4 | -3 | 0 | 3 | -1 | 0 | 0 | -1 | 0 | -2 | -1 | 2 | 7 | 9 |
Freezing level m | 1500 | 1850 | 1950 | 2000 | 2250 | 2700 | 3350 | 3350 | 3000 | 3000 | 2800 | 2750 | 3000 | 3050 | 3550 | 3700 | 3700 | 3700 |
 | 7:20 | — | — | 7:20 | — | — | 7:22 | — | — | 7:24 | — | — | 7:26 | — | — | 7:26 | — | — |
 | — | 6:29 | — | — | 6:27 | — | — | 6:24 | — | — | 6:22 | — | — | 6:21 | — | — | 6:19 | — |
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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 4°C on Mon night, min -4°C on Sat morning). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Some drizzle, heaviest during Wed morning. Very mild (max 10°C on Thu night, min 3°C on Tue morning). 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.