– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 3 am Sun 22 Feb Local TimeUpdates in: hr min sUpdate imminent
Issued: 3 am Sun 22 Feb Local Time
Updates in:
Update imminent hr min s
Issued: 3 am Sun 22 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 below freezing (max -4°C on Sun morning, min -10°C on Tue afternoon). Winds decreasing (strong winds from the SSW on Sun night, calm by Mon night). | Days 4–6 Weather SummaryA moderate fall of snow, heaviest on Fri afternoon. Temperatures will be below freezing (max -5°C on Fri night, min -8°C on Wed morning). Mainly strong winds. | |||||||||||||||||
Sunday 22 | Monday 23 | Tuesday 24 | Wednesday 25 | Thursday 26 | Friday 27 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  |  |  |  |  | | | |  | | | | |  | | |
light snow | light snow | mod. snow | heavy snow | snow shwrs | some clouds | some clouds | clear | mod. snow | light snow | light snow | snow shwrs | some clouds | some clouds | some clouds | light snow | mod. snow | some clouds | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
5 | 2 | 8 | 13 | 8 | — | — | — | 10 | 2 | 2 | 1 | — | — | — | 1 | 6 | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -4 | -5 | -4 | -5 | -7 | -6 | -7 | -8 | -9 | -7 | -6 | -6 | -7 | -6 | -6 | -7 | -7 | -5 |
min °C | -5 | -5 | -5 | -6 | -7 | -7 | -7 | -10 | -10 | -8 | -6 | -7 | -7 | -6 | -7 | -7 | -7 | -7 |
-14 | -14 | -14 | -14 | -14 | -11 | -14 | -19 | -20 | -17 | -14 | -15 | -16 | -15 | -16 | -17 | -16 | -15 | |
1450 | 1300 | 1300 | 1250 | 1000 | 600 | 900 | 900 | 650 | 800 | 900 | 850 | 950 | 1050 | 550 | 950 | 950 | 450 | |
Cloud base (m) | 850 | 600 | 600 | 600 | 600 | 650 | 1900 | 1500 | 650 | 650 | 600 | 600 | 600 | 600 | 750 | 700 | 600 | 600 |
 | 7:01 | — | — | 7:00 | — | — | 6:58 | — | — | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — |
 | — | 5:39 | — | — | 5:42 | — | — | 5:43 | — | — | 5:45 | — | — | 5:46 | — | — | 5:47 | — |
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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 below freezing (max -4°C on Sun morning, min -10°C on Tue afternoon). Winds decreasing (strong winds from the SSW on Sun night, calm by Mon night).
South Twin Sister Weather (Days 3-6):
A moderate fall of snow, heaviest on Fri afternoon. Temperatures will be below freezing (max -5°C on Fri night, min -8°C on Wed morning). Mainly strong winds.
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.