– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 3 pm Sun 01 Nov Local Time
Updates in:
Update imminent hr min s
Issued: 3 pm Sun 01 Nov 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 Sun night, min -1°C on Sun afternoon). Wind will be generally light. | Days 5–7 Weather SummaryA heavy fall of snow, heaviest during Thu night. Freeze-thaw conditions (max 5°C on Sat morning, min -5°C on Thu night). Winds decreasing (strong winds from the S on Thu night, light winds from the WSW by Fri afternoon). | ||||||||||||||||
Sun 1 | Monday 2 | Tuesday 3 | Wednesday 4 | Thursday 5 | Friday 6 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  | |  | | |  |  | | |  | | |  | |
clear | clear | cloudy | cloudy | cloudy | cloudy | some clouds | clear | cloudy | light snow | mod. snow | some clouds | cloudy | heavy snow | some clouds | some clouds | light rain | |
Cloud base (m) | 5350 | 5800 | 4800 | 2450 | 1550 | 1750 | 2100 | 2150 | 1900 | 600 | 600 | 850 | 600 | 650 | 900 | 2650 | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
 cm | — | — | — | — | — | — | — | — | — | 4 | 6 | — | — | 16 | — | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 0.1 |
max °C | 0 | 3 | 3 | 3 | 1 | 0 | 0 | 0 | 0 | -1 | -3 | -2 | -2 | -3 | -2 | 0 | 3 |
min °C | -1 | 1 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | -2 | -3 | -2 | -2 | -5 | -4 | -1 | 1 |
chill °C | -4 | -2 | 0 | -2 | -4 | -3 | -2 | 0 | -4 | -7 | -10 | -6 | -9 | -14 | -9 | -5 | -4 |
Freezing level m | 1950 | 3000 | 3100 | 2850 | 2350 | 2100 | 2100 | 2200 | 2150 | 1900 | 1650 | 1650 | 1750 | 1400 | 1400 | 1500 | 2650 |
 | — | — | 6:56 | — | — | 6:56 | — | — | 6:58 | — | — | 7:01 | — | — | 7:01 | — | — |
 | 3:46 | — | — | 4:45 | — | — | 4:44 | — | — | 4:42 | — | — | 4:40 | — | — | 4:38 | — |
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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 Sun night, min -1°C on Sun afternoon). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Thu night. Freeze-thaw conditions (max 5°C on Sat morning, min -5°C on Thu night). Winds decreasing (strong winds from the S on Thu night, light winds from the WSW by Fri afternoon).
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.