– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 pm Wed 13 May Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 pm Wed 13 May Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Wed 13 May 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 -1°C on Wed afternoon, min -7°C on Fri night). Winds decreasing (strong winds from the W on Wed night, light winds from the SW by Thu night). | Days 5–7 Weather SummaryA moderate fall of snow, heaviest on Tue morning. Temperatures will be below freezing (max -1°C on Mon afternoon, min -6°C on Sat afternoon). Wind will be generally light. | ||||||||||||||||
Wed 13 | Thursday 14 | Friday 15 | Saturday 16 | Sunday 17 | Monday 18 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  | |  | | | |  |  | |  |  | | | |
light snow | light snow | snow shwrs | light snow | heavy snow | light snow | heavy snow | heavy snow | light snow | snow shwrs | snow shwrs | cloudy | snow shwrs | some clouds | some clouds | cloudy | some clouds | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
4 | 2 | 1 | 2 | 11 | 5 | 12 | 16 | 3 | 3 | 1 | — | 2 | — | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -1 | -2 | -3 | -3 | -4 | -5 | -5 | -5 | -7 | -5 | -5 | -5 | -4 | -3 | -2 | -1 | -1 |
min °C | -2 | -4 | -4 | -3 | -5 | -6 | -5 | -7 | -7 | -6 | -5 | -5 | -4 | -3 | -3 | -2 | -2 |
-10 | -12 | -10 | -9 | -12 | -12 | -12 | -15 | -14 | -12 | -11 | -5 | -8 | -6 | -6 | -5 | -7 | |
1800 | 1450 | 1650 | 1700 | 1400 | 1250 | 1300 | 1100 | 1150 | 1350 | 1200 | 1300 | 1600 | 1650 | 1700 | 1950 | 1800 | |
Cloud base (m) | 600 | 650 | 700 | 1750 | 600 | 600 | 600 | 600 | 600 | 600 | 600 | 650 | 850 | 2500 | 950 | 1600 | 900 |
 | — | — | 5:28 | — | — | 5:26 | — | — | 5:24 | — | — | 5:24 | — | — | 5:22 | — | — |
 | — | 8:38 | — | — | 8:39 | — | — | 8:42 | — | — | 8:43 | — | — | 8:44 | — | — | 8:45 |
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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 -1°C on Wed afternoon, min -7°C on Fri night). Winds decreasing (strong winds from the W on Wed night, light winds from the SW by Thu night).
South Twin Sister Weather (Days 3-6):
A moderate fall of snow, heaviest on Tue morning. Temperatures will be below freezing (max -1°C on Mon afternoon, min -6°C on Sat afternoon). Wind will be generally light.
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.