– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 9 pm Mon 16 Feb Local TimeUpdates in: hr min sUpdate imminent
Issued: 9 pm Mon 16 Feb Local Time
Updates in:
Update imminent hr min s
Issued: 9 pm Mon 16 Feb Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryA moderate fall of snow, heaviest on Tue afternoon. Temperatures will be well below freezing (max -10°C on Tue morning, min -13°C on Wed afternoon). Wind will be generally light. | Days 5–7 Weather SummaryMostly dry. Temperatures will be below freezing (max -1°C on Sat night, min -12°C on Thu night). Winds increasing (light winds from the SSW on Fri afternoon, strong winds from the SSE by Sun afternoon). | ||||||||||||||||||
Tuesday 17 | Wednesday 18 | Thursday 19 | Friday 20 | Saturday 21 | Sunday 22 | ||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  | | |  | | | |  | | | | | |  | |
some clouds | snow shwrs | heavy snow | light snow | cloudy | some clouds | some clouds | some clouds | clear | some clouds | some clouds | cloudy | cloudy | cloudy | cloudy | some clouds | cloudy | cloudy | snow shwrs | |
km/h | |||||||||||||||||||
 |  |  |  |  |  |  | |||||||||||||
— | 1 | 13 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 6 | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -11 | -10 | -11 | -11 | -12 | -12 | -13 | -13 | -12 | -11 | -10 | -9 | -5 | -4 | -2 | -1 | -1 | -1 | -5 |
min °C | -11 | -11 | -11 | -12 | -12 | -13 | -13 | -13 | -13 | -12 | -10 | -9 | -8 | -5 | -3 | -3 | -1 | -2 | -8 |
-20 | -11 | -16 | -16 | -18 | -18 | -16 | -18 | -21 | -19 | -16 | -13 | -15 | -12 | -10 | -9 | -8 | -10 | -17 | |
350 | 800 | 550 | 200 | 350 | 450 | 0 | 200 | 400 | 0 | 400 | 650 | 200 | 1100 | 1650 | 1750 | 2000 | 1700 | 950 | |
Cloud base (m) | 550 | 5400 | 700 | 550 | 550 | 550 | 650 | 600 | 650 | 650 | 600 | 650 | 600 | 1600 | 900 | 600 | 1850 | 1950 | 600 |
 | — | 7:11 | — | — | 7:09 | — | — | 7:07 | — | — | 7:05 | — | — | 7:03 | — | — | 7:01 | — | — |
 | — | — | 5:31 | — | — | 5:34 | — | — | 5:35 | — | — | 5:37 | — | — | 5:38 | — | — | 5:39 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: A moderate fall of snow, heaviest on Tue afternoon. Temperatures will be well below freezing (max -10°C on Tue morning, min -13°C on Wed afternoon). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Mostly dry. Temperatures will be below freezing (max -1°C on Sat night, min -12°C on Thu night). Winds increasing (light winds from the SSW on Fri afternoon, strong winds from the SSE by Sun afternoon).
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.