– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 3 pm Thu 05 Nov Local Time
Updates in:
Update imminent hr min s
Issued: 3 pm Thu 05 Nov Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryLight rain (total 2mm) on Sat morning. Becoming colder with heavy fall of snow, heaviest during Sat night. Freeze-thaw conditions (max 4°C on Sat morning, min -6°C on Sun morning). Winds increasing (light winds from the SSW on Fri night, severe gales from the S by Sat afternoon). | Days 5–7 Weather SummaryA light covering of new snow on Tue morning turning to drizzle on Tue night. Freeze-thaw conditions (max 7°C on Wed morning, min -6°C on Sun afternoon). Winds increasing (calm on Sun night, strong winds from the S by Wed morning). | ||||||||||||||||
Thu 5 | Friday 6 | Saturday 7 | Sunday 8 | Monday 9 | Tuesday 10 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  | |  |  | |  | |  | |  | |  | |
some clouds | snow shwrs | cloudy | light snow | light snow | light rain | light rain | heavy snow | snow shwrs | snow shwrs | some clouds | some clouds | clear | snow shwrs | mod. snow | light snow | light rain | |
Cloud base (m) | 2800 | 2600 | 600 | 700 | 600 | 850 | 650 | 550 | 600 | 750 | 6550 | 6550 | 2800 | 1550 | 600 | 650 | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
 cm | — | 2 | — | 4 | 3 | — | — | 20 | 11 | 1 | — | — | — | 1 | 6 | 1 | — |
mm | — | — | — | — | — | 2 | 0.1 | — | — | — | — | — | — | — | — | 0.3 | 1.5 |
max °C | -2 | 1 | 1 | 2 | 3 | 4 | 4 | -2 | -5 | -6 | -1 | 0 | 0 | 1 | 1 | 3 | 6 |
min °C | -3 | -1 | 0 | 1 | 0 | 4 | 3 | -4 | -6 | -6 | -5 | 0 | 0 | -1 | 1 | 2 | 3 |
chill °C | -9 | -7 | -7 | -6 | -5 | -2 | -6 | -14 | -15 | -14 | -10 | -5 | -5 | -9 | -6 | -4 | -3 |
Freezing level m | 1750 | 2250 | 2350 | 2700 | 2150 | 2850 | 2650 | 1550 | 1400 | 1250 | 1250 | 2100 | 2200 | 2300 | 2300 | 2450 | 2900 |
 | — | — | 7:01 | — | — | 7:03 | — | — | 7:05 | — | — | 7:07 | — | — | 7:07 | — | — |
 | 4:40 | — | — | 4:38 | — | — | 4:37 | — | — | 4:36 | — | — | 4:35 | — | — | 4:34 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Light rain (total 2mm) on Sat morning. Becoming colder with heavy fall of snow, heaviest during Sat night. Freeze-thaw conditions (max 4°C on Sat morning, min -6°C on Sun morning). Winds increasing (light winds from the SSW on Fri night, severe gales from the S by Sat afternoon).
South Twin Sister Weather (Days 3-6):
A light covering of new snow on Tue morning turning to drizzle on Tue night. Freeze-thaw conditions (max 7°C on Wed morning, min -6°C on Sun afternoon). Winds increasing (calm on Sun night, strong winds from the S by Wed 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.