– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 3 pm Thu 12 Feb Local TimeUpdates in: hr min sUpdate imminent
Issued: 3 pm Thu 12 Feb Local Time
Updates in:
Update imminent hr min s
Issued: 3 pm Thu 12 Feb 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 Fri night. Temperatures will be below freezing (max -3°C on Thu afternoon, min -10°C on Sat morning). Winds decreasing (fresh winds from the SSW on Fri afternoon, calm by Sat night). | Days 5–7 Weather SummaryA moderate fall of snow, heaviest on Mon night. Temperatures will be below freezing (max -4°C on Mon night, min -10°C on Tue night). Winds decreasing (fresh winds from the ESE on Mon night, calm by Tue afternoon). | ||||||||||||||||
Thu 12 | Friday 13 | Saturday 14 | Sunday 15 | Monday 16 | Tuesday 17 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  |  | |  |  | | | | |  | |  |  | |
cloudy | light snow | mod. snow | mod. snow | heavy snow | light snow | cloudy | some clouds | some clouds | some clouds | some clouds | cloudy | cloudy | mod. snow | mod. snow | snow shwrs | snow shwrs | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
— | 2 | 6 | 9 | 12 | 4 | — | — | — | — | — | — | — | 9 | 6 | 1 | 1 | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -3 | -5 | -6 | -6 | -7 | -9 | -9 | -8 | -7 | -8 | -8 | -6 | -5 | -4 | -8 | -8 | -8 |
min °C | -4 | -6 | -6 | -6 | -9 | -10 | -9 | -8 | -7 | -8 | -9 | -7 | -6 | -8 | -9 | -8 | -10 |
-10 | -13 | -14 | -15 | -16 | -17 | -14 | -11 | -11 | -14 | -16 | -15 | -12 | -13 | -15 | -12 | -17 | |
1500 | 1150 | 1150 | 1100 | 850 | 800 | 800 | 200 | 900 | 900 | 300 | 950 | 1050 | 1300 | 700 | 850 | 0 | |
Cloud base (m) | 2100 | 1800 | 600 | 550 | 550 | 600 | 550 | 650 | 2200 | 650 | 550 | 550 | 650 | 1650 | 550 | 550 | 650 |
 | — | — | 7:18 | — | — | 7:16 | — | — | 7:15 | — | — | 7:13 | — | — | 7:11 | — | — |
 | 5:23 | — | — | 5:25 | — | — | 5:27 | — | — | 5:29 | — | — | 5:30 | — | — | 5:31 | — |
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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 Fri night. Temperatures will be below freezing (max -3°C on Thu afternoon, min -10°C on Sat morning). Winds decreasing (fresh winds from the SSW on Fri afternoon, calm by Sat night).
South Twin Sister Weather (Days 3-6):
A moderate fall of snow, heaviest on Mon night. Temperatures will be below freezing (max -4°C on Mon night, min -10°C on Tue night). Winds decreasing (fresh winds from the ESE on Mon night, calm by Tue 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.