– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 3 am Mon 23 Feb Local TimeUpdates in: hr min sUpdate imminent
Issued: 3 am Mon 23 Feb Local Time
Updates in:
Update imminent hr min s
Issued: 3 am Mon 23 Feb Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryA heavy fall of snow, heaviest during Mon morning. Temperatures will be well below freezing (max -6°C on Mon night, min -9°C on Mon morning). Winds increasing (calm on Mon night, fresh winds from the W by Wed morning). | Days 4–6 Weather SummaryA moderate fall of snow, heaviest on Thu night. Temperatures will be below freezing (max -4°C on Sat morning, min -8°C on Fri morning). Winds decreasing (strong winds from the WSW on Thu night, light winds from the W by Sat morning). | |||||||||||||||||
Monday 23 | Tuesday 24 | Wednesday 25 | Thursday 26 | Friday 27 | Saturday 28 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  | |  | |  |  | | | | | | |  | |  | |
light snow | light snow | some clouds | some clouds | some clouds | snow shwrs | light snow | snow shwrs | light snow | some clouds | some clouds | light snow | light snow | light snow | some clouds | clear | clear | clear | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
5 | 1 | — | — | — | 3 | 4 | 3 | 4 | — | — | 5 | 4 | 1 | — | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -9 | -7 | -6 | -7 | -8 | -8 | -8 | -8 | -7 | -7 | -6 | -7 | -7 | -8 | -5 | -4 | -4 | -4 |
min °C | -9 | -8 | -7 | -7 | -9 | -9 | -8 | -8 | -8 | -7 | -7 | -7 | -8 | -8 | -7 | -4 | -5 | -5 |
-18 | -11 | -7 | -12 | -17 | -17 | -17 | -17 | -16 | -16 | -16 | -17 | -18 | -17 | -14 | -8 | -10 | -11 | |
950 | 950 | 750 | 950 | 950 | 550 | 850 | 900 | 900 | 950 | 1000 | 950 | 950 | 800 | 0 | 950 | 1100 | 250 | |
Cloud base (m) | 600 | 600 | 850 | 1950 | 1450 | 600 | 600 | 600 | 600 | 600 | 650 | 600 | 600 | 600 | 600 | 600 | 650 | 600 |
 | 7:00 | — | — | 6:58 | — | — | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — | 6:50 | — | — |
 | — | 5:42 | — | — | 5:43 | — | — | 5:45 | — | — | 5:46 | — | — | 5:47 | — | — | 5:50 | — |
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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 Mon morning. Temperatures will be well below freezing (max -6°C on Mon night, min -9°C on Mon morning). Winds increasing (calm on Mon night, fresh winds from the W by Wed morning).
South Twin Sister Weather (Days 3-6):
A moderate fall of snow, heaviest on Thu night. Temperatures will be below freezing (max -4°C on Sat morning, min -8°C on Fri morning). Winds decreasing (strong winds from the WSW on Thu night, light winds from the W by Sat 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.