– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 pm Tue 14 Apr Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 pm Tue 14 Apr Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Tue 14 Apr 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 Tue night. Temperatures will be well below freezing (max -6°C on Tue afternoon, min -11°C on Tue night). Winds decreasing (near gales from the SSW on Tue afternoon, calm by Fri morning). | Days 5–7 Weather SummaryMostly dry. Freeze-thaw conditions (max 6°C on Sun night, min -5°C on Fri afternoon). Wind will be generally light. | ||||||||||||||||
Tue 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  | |  | |  | |  | | | |  | | | | |  | |
mod. snow | snow shwrs | mod. snow | snow shwrs | snow shwrs | some clouds | snow shwrs | some clouds | some clouds | some clouds | some clouds | clear | some clouds | some clouds | some clouds | some clouds | clear | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
9 | 11 | 6 | 4 | 1 | — | 2 | — | — | — | — | — | — | — | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -6 | -6 | -11 | -10 | -9 | -8 | -7 | -6 | -6 | -4 | -2 | -1 | 1 | 4 | 4 | 5 | 6 |
min °C | -7 | -11 | -11 | -11 | -10 | -9 | -8 | -7 | -6 | -5 | -4 | -2 | 0 | 2 | 4 | 5 | 6 |
-17 | -21 | -18 | -17 | -16 | -16 | -14 | -12 | -8 | -5 | -7 | -6 | -4 | -1 | 2 | 3 | 4 | |
1050 | 400 | 650 | 800 | 400 | 850 | 1000 | 350 | 1000 | 1200 | 1400 | 1900 | 2300 | 2650 | 2850 | 2900 | 2950 | |
Cloud base (m) | 550 | 600 | 550 | 550 | 600 | 600 | 650 | 1000 | 800 | 750 | 600 | 650 | 2250 | 6150 | 6800 | 8550 | |
 | — | — | 6:16 | — | — | 6:15 | — | — | 6:13 | — | — | 6:11 | — | — | 6:09 | — | — |
 | 7:57 | — | — | 7:59 | — | — | — | 8:00 | — | — | 8:01 | — | — | 8:02 | — | — | 8:04 |
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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 Tue night. Temperatures will be well below freezing (max -6°C on Tue afternoon, min -11°C on Tue night). Winds decreasing (near gales from the SSW on Tue afternoon, calm by Fri morning).
South Twin Sister Weather (Days 3-6):
Mostly dry. Freeze-thaw conditions (max 6°C on Sun night, min -5°C on Fri afternoon). 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.