– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 3 pm Wed 18 Feb Local TimeUpdates in: hr min sUpdate imminent
Issued: 3 pm Wed 18 Feb Local Time
Updates in:
Update imminent hr min s
Issued: 3 pm Wed 18 Feb Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryA dusting of new snow. Temperatures will be below freezing (max -4°C on Sat morning, min -13°C on Thu morning). Wind will be generally light. | Days 5–7 Weather SummaryA moderate fall of snow, heaviest on Sun night. Temperatures will be below freezing (max -2°C on Sat night, min -7°C on Mon afternoon). Winds decreasing (near gales from the SSW on Mon morning, light winds from the WSW by Mon night). | ||||||||||||||||
Wed 18 | Thursday 19 | Friday 20 | Saturday 21 | Sunday 22 | Monday 23 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | |  | |  | | | | | |  | |  | | |
light snow | some clouds | some clouds | clear | some clouds | cloudy | cloudy | cloudy | some clouds | cloudy | some clouds | cloudy | some clouds | light snow | light snow | snow shwrs | some clouds | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
2 | — | — | — | — | — | — | — | — | — | — | — | — | 5 | 4 | 3 | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -12 | -12 | -13 | -12 | -11 | -11 | -10 | -7 | -4 | -3 | -2 | -2 | -2 | -4 | -3 | -6 | -6 |
min °C | -12 | -12 | -13 | -13 | -12 | -11 | -11 | -9 | -6 | -4 | -3 | -2 | -4 | -5 | -5 | -7 | -7 |
-16 | -15 | -19 | -19 | -18 | -18 | -17 | -13 | -14 | -11 | -10 | -8 | -12 | -13 | -15 | -15 | -14 | |
450 | 0 | 250 | 350 | 0 | 300 | 550 | 200 | 1200 | 1350 | 1750 | 1800 | 1400 | 1350 | 1500 | 1300 | 1100 | |
Cloud base (m) | 550 | 800 | 800 | 750 | 550 | 700 | 650 | 900 | 2400 | 2800 | 2700 | 2350 | 1700 | 600 | 600 | 600 | 750 |
 | — | — | 7:07 | — | — | 7:05 | — | — | 7:03 | — | — | 7:01 | — | — | 7:00 | — | — |
 | 5:34 | — | — | 5:35 | — | — | 5:37 | — | — | 5:38 | — | — | 5:39 | — | — | 5:42 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: A dusting of new snow. Temperatures will be below freezing (max -4°C on Sat morning, min -13°C on Thu morning). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
A moderate fall of snow, heaviest on Sun night. Temperatures will be below freezing (max -2°C on Sat night, min -7°C on Mon afternoon). Winds decreasing (near gales from the SSW on Mon morning, light winds from the WSW by Mon 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.