– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 pm Thu 26 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 pm Thu 26 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Thu 26 Mar Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryMostly dry. Temperatures will be below freezing (max -2°C on Fri night, min -9°C on Thu afternoon). Wind will be generally light. | Days 5–7 Weather SummaryA heavy fall of snow, heaviest during Mon morning. Temperatures will be below freezing (max -3°C on Tue night, min -11°C on Mon morning). Winds increasing (calm on Tue morning, strong winds from the S by Tue night). | ||||||||||||||||
Thu 26 | Friday 27 | Saturday 28 | Sunday 29 | Monday 30 | Tuesday 31 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  | | | | | |  |  | |  | | |  | |
some clouds | some clouds | cloudy | cloudy | cloudy | some clouds | cloudy | cloudy | cloudy | cloudy | mod. snow | mod. snow | some clouds | clear | cloudy | cloudy | light snow | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
— | — | — | — | — | — | — | — | — | — | 8 | 9 | — | — | — | — | 2 | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -8 | -4 | -3 | -3 | -2 | -4 | -5 | -6 | -7 | -6 | -7 | -11 | -10 | -8 | -7 | -5 | -3 |
min °C | -9 | -7 | -3 | -3 | -4 | -5 | -6 | -6 | -7 | -6 | -9 | -11 | -11 | -10 | -7 | -6 | -4 |
-14 | -11 | -9 | -9 | -10 | -11 | -12 | -12 | -13 | -12 | -18 | -19 | -18 | -17 | -10 | -11 | -11 | |
1100 | 900 | 1700 | 1700 | 1600 | 1300 | 1250 | 1100 | 1150 | 1250 | 750 | 550 | 700 | 0 | 900 | 1300 | 1650 | |
Cloud base (m) | 1900 | 600 | 1600 | 3500 | 2150 | 2100 | 950 | 900 | 700 | 2200 | 550 | 600 | 650 | 600 | 4450 | 3550 | 2200 |
 | — | — | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — |
 | 7:29 | — | — | 7:30 | — | — | 7:31 | — | — | 7:32 | — | — | 7:35 | — | — | 7:36 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Mostly dry. Temperatures will be below freezing (max -2°C on Fri night, min -9°C on Thu afternoon). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Mon morning. Temperatures will be below freezing (max -3°C on Tue night, min -11°C on Mon morning). Winds increasing (calm on Tue morning, strong winds from the S by Tue 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.