– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 4 am Fri 09 Oct Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Fri 09 Oct Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryA light covering of new snow mostly falling on Fri morning. Freeze-thaw conditions (max 3°C on Sun night, min -4°C on Fri night). Winds decreasing (strong winds from the WSW on Fri morning, calm by Fri night). | Days 4–6 Weather SummaryLight rain (total 5mm), mostly falling on Wed morning. Mild temperatures (max 5°C on Wed night, min 2°C on Wed morning). Wind will be generally light. | |||||||||||||||||
Friday 9 | Saturday 10 | Sunday 11 | Monday 12 | Tuesday 13 | Wednesday 14 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  | |  |  | | | | | | | |  |  | | | |
snow shwrs | snow shwrs | some clouds | some clouds | some clouds | clear | clear | clear | clear | clear | clear | some clouds | some clouds | some clouds | light rain | light rain | light rain | some clouds | |
Cloud base (m) | 600 | 650 | 1700 | 800 | 1550 | 8550 | 2600 | 2350 | 1900 | 1750 | 600 | 600 | 7050 | |||||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | 3 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 0.7 | 3 | 0.6 | — |
max °C | 2 | -2 | -3 | -3 | -2 | -1 | -1 | 1 | 3 | 3 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 5 |
min °C | 0 | -3 | -4 | -4 | -3 | -1 | -1 | 1 | 2 | 3 | 4 | 3 | 3 | 3 | 3 | 2 | 3 | 5 |
chill °C | -6 | -8 | -6 | -9 | -7 | -6 | -5 | -3 | -1 | 1 | 3 | -1 | -1 | 0 | -1 | -3 | -2 | 1 |
Freezing level m | 2100 | 1700 | 1500 | 1600 | 1900 | 1950 | 2050 | 2400 | 3150 | 3450 | 3400 | 3100 | 3000 | 2950 | 2750 | 2700 | 2800 | 3700 |
 | 7:18 | — | — | 7:20 | — | — | 7:20 | — | — | 7:22 | — | — | 7:24 | — | — | 7:26 | — | — |
 | — | 6:30 | — | — | 6:29 | — | — | 6:27 | — | — | 6:24 | — | — | 6:22 | — | — | 6:21 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: A light covering of new snow mostly falling on Fri morning. Freeze-thaw conditions (max 3°C on Sun night, min -4°C on Fri night). Winds decreasing (strong winds from the WSW on Fri morning, calm by Fri night).
South Twin Sister Weather (Days 3-6):
Light rain (total 5mm), mostly falling on Wed morning. Mild temperatures (max 5°C on Wed night, min 2°C on Wed 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.