– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 pm Fri 31 May Local TimeUpdates in: hr min sUpdate imminent
South Twin SisterWeather Forecast, United States
Issued: 4 pm Fri 31 May Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Fri 31 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 Mon morning. Freeze-thaw conditions (max 4°C on Fri afternoon, min -4°C on Mon morning). Winds increasing (light winds from the W on Fri afternoon, strong winds from the S by Sun morning). | Days 5–7 Weather SummaryA moderate fall of snow, heaviest on Mon afternoon. Freeze-thaw conditions (max 10°C on Wed night, min -4°C on Mon afternoon). Winds decreasing (strong winds from the SSW on Tue morning, light winds from the SW by Thu morning). | ||||||||||||||||
Fri 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  | |  |  | | |  | |  |  |  | |  | |
some clouds | cloudy | light snow | some clouds | some clouds | light snow | mod. snow | heavy snow | mod. snow | mod. snow | light snow | light snow | snow shwrs | snow shwrs | clear | clear | clear | |
km/h | |||||||||||||||||
Wave Height Map |  |  |  |  |  |  | |||||||||||
— | — | 1.0 | — | — | 5 | 8 | 20 | 10 | 7 | 3 | 2.0 | 1.0 | 1.0 | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max°C | 4 | 4 | 0 | 0 | 0 | 0 | 0 | 1 | -2 | -3 | -1 | -1 | -1 | 0 | 2 | 6 | 10 |
min°C | 4 | 0 | 0 | 0 | 0 | 0 | 0 | -2 | -4 | -4 | -3 | -1 | -1 | -1 | 0 | 5 | 7 |
1 | -5 | -5 | -4 | -4 | -7 | -7 | -8 | -10 | -12 | -10 | -8 | -9 | -7 | -5 | 2 | 5 | |
2850 | 2550 | 2050 | 2200 | 2200 | 2100 | 2200 | 2000 | 1400 | 1550 | 1650 | 1950 | 2000 | 2100 | 2700 | 3250 | 3900 | |
Cloud base (m) | 4900 | 2550 | 600 | 700 | 1550 | 550 | 500 | 500 | 550 | 550 | 600 | 550 | 600 | 600 | 650 | ||
 | — | — | 5:09 | — | — | 5:07 | — | — | 5:07 | — | — | 5:07 | — | — | 5:05 | — | — |
 | — | 9:01 | — | — | 9:02 | — | — | 9:04 | — | — | 9:04 | — | — | 9:05 | — | — | 9:06 |
South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: A heavy fall of snow, heaviest during Mon morning. Freeze-thaw conditions (max 4°C on Fri afternoon, min -4°C on Mon morning). Winds increasing (light winds from the W on Fri afternoon, strong winds from the S by Sun morning).
South Twin Sister Weather (Days 3-6):
A moderate fall of snow, heaviest on Mon afternoon. Freeze-thaw conditions (max 10°C on Wed night, min -4°C on Mon afternoon). Winds decreasing (strong winds from the SSW on Tue morning, light winds from the SW by Thu 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.
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