– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 3 pm Fri 06 Nov Local Time
Updates in:
Update imminent hr min s
Issued: 3 pm Fri 06 Nov Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryModerate rain (total 19mm), heaviest on Fri afternoon giving way to a moderate fall of snow, heaviest on Sun morning. Freeze-thaw conditions (max 9°C on Sat morning, min -1°C on Sun morning). Winds decreasing (gales from the S on Sat night, calm by Sun night). | Days 5–7 Weather SummaryHeavy rain (total 43mm), heaviest during Tue afternoon. Freeze-thaw conditions (max 12°C on Wed night, min 0°C on Mon afternoon). Winds decreasing (strong winds from the S on Tue morning, light winds from the S by Wed night). | ||||||||||||||||
Fri 6 | Saturday 7 | Sunday 8 | Monday 9 | Tuesday 10 | Wednesday 11 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  |  |  |  |  |  |  | | | |  | |  | |
heavy rain | rain shwrs | light rain | light rain | mod. snow | mod. snow | snow shwrs | clear | some clouds | cloudy | mod. rain | heavy rain | heavy rain | rain shwrs | clear | some clouds | some clouds | |
Cloud base (m) | 600 | 600 | 2650 | 2000 | 550 | 650 | 600 | 850 | 2400 | 700 | 600 | 600 | 950 | 4850 | 6400 | 6650 | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
 cm | — | — | — | — | 7 | 7 | 1 | — | — | — | — | — | — | — | — | — | — |
mm | 10 | 6 | 0.1 | 0.7 | 1.6 | — | — | — | — | — | 6 | 16 | 15 | 5 | — | — | — |
max °C | 5 | 6 | 9 | 9 | 5 | 0 | 0 | 1 | 1 | 1 | 3 | 5 | 6 | 10 | 11 | 11 | 12 |
min °C | 4 | 3 | 8 | 8 | 0 | -1 | -1 | 0 | 1 | 0 | 0 | 4 | 6 | 7 | 11 | 11 | 12 |
chill °C | 0 | -2 | 5 | 2 | -9 | -7 | -6 | 0 | -3 | -6 | -5 | -2 | 1 | 2 | 8 | 9 | 10 |
Freezing level m | 2400 | 2250 | 2750 | 2700 | 1650 | 1500 | 1400 | 1450 | 1700 | 1650 | 2100 | 2500 | 2650 | 2950 | 3250 | 3350 | 3300 |
 | — | — | 7:03 | — | — | 7:05 | — | — | 7:07 | — | — | 7:07 | — | — | 7:09 | — | — |
 | 4:38 | — | — | 4:37 | — | — | 4:36 | — | — | 4:35 | — | — | 4:34 | — | — | 4:31 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Moderate rain (total 19mm), heaviest on Fri afternoon giving way to a moderate fall of snow, heaviest on Sun morning. Freeze-thaw conditions (max 9°C on Sat morning, min -1°C on Sun morning). Winds decreasing (gales from the S on Sat night, calm by Sun night).
South Twin Sister Weather (Days 3-6):
Heavy rain (total 43mm), heaviest during Tue afternoon. Freeze-thaw conditions (max 12°C on Wed night, min 0°C on Mon afternoon). Winds decreasing (strong winds from the S on Tue morning, light winds from the S by Wed night).
This table gives the weather forecast for South Twin Sister at the specific elevation of 1500 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.