– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 3 pm Wed 04 Nov Local Time
Updates in:
Update imminent hr min s
Issued: 3 pm Wed 04 Nov Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryA heavy fall of snow, heaviest during Wed night. Becoming milder with drizzle, on Fri night. Freeze-thaw conditions (max 4°C on Sat morning, min -4°C on Wed night). Winds increasing (light winds from the WSW on Thu morning, strong winds from the SSW by Sat morning). | Days 5–7 Weather SummaryA moderate fall of snow, heaviest on Sat night. Freeze-thaw conditions (max 5°C on Sat afternoon, min -7°C on Sun morning). Winds decreasing (extremely windy from the S on Sat night, calm by Sun night). | ||||||||||||||||
Wed 4 | Thursday 5 | Friday 6 | Saturday 7 | Sunday 8 | Monday 9 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | |  | |  |  | |  | |  |  | | |  | |
cloudy | snow shwrs | snow shwrs | some clouds | snow shwrs | light snow | light snow | mod. snow | light rain | cloudy | heavy snow | snow shwrs | clear | clear | some clouds | some clouds | some clouds | |
Cloud base (m) | 2650 | 600 | 750 | 700 | 2400 | 700 | 650 | 600 | 650 | 6600 | 750 | 650 | 9200 | 6450 | 3050 | ||
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
 cm | — | 15 | 1 | — | 1 | 2 | 4 | 8 | — | — | 14 | 5 | — | — | — | — | — |
mm | — | — | — | — | — | — | — | 0.5 | 0.5 | — | — | — | — | — | — | — | — |
max °C | 1 | -2 | -3 | -3 | 0 | 1 | 2 | 3 | 4 | 5 | 2 | -6 | -5 | -1 | 0 | 0 | 2 |
min °C | -1 | -4 | -4 | -3 | -2 | -1 | 1 | 0 | 3 | 4 | -4 | -7 | -6 | -3 | -1 | -1 | 0 |
chill °C | -8 | -10 | -9 | -8 | -8 | -8 | -6 | -6 | -4 | -4 | -14 | -16 | -14 | -3 | -7 | -6 | -4 |
Freezing level m | 2300 | 1700 | 1550 | 1650 | 2100 | 2000 | 2600 | 2250 | 2700 | 2800 | 1750 | 1250 | 1300 | 1400 | 2050 | 2000 | 2300 |
 | — | — | 7:01 | — | — | 7:01 | — | — | 7:03 | — | — | 7:05 | — | — | 7:07 | — | — |
 | 4:42 | — | — | 4:40 | — | — | 4:38 | — | — | 4:37 | — | — | 4:36 | — | — | 4:35 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: A heavy fall of snow, heaviest during Wed night. Becoming milder with drizzle, on Fri night. Freeze-thaw conditions (max 4°C on Sat morning, min -4°C on Wed night). Winds increasing (light winds from the WSW on Thu morning, strong winds from the SSW by Sat morning).
South Twin Sister Weather (Days 3-6):
A moderate fall of snow, heaviest on Sat night. Freeze-thaw conditions (max 5°C on Sat afternoon, min -7°C on Sun morning). Winds decreasing (extremely windy from the S on Sat night, calm by Sun night).
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.