– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 9 am Sat 10 Jan Local TimeUpdates in: hr min sUpdate imminent
Issued: 9 am Sat 10 Jan Local Time
Updates in:
Update imminent hr min s
Issued: 9 am Sat 10 Jan 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 Sat afternoon. Becoming milder with moderate rain (total 18mm) on Mon afternoon. Freeze-thaw conditions (max 3°C on Mon afternoon, min -4°C on Sat afternoon). Mainly near gales. | Days 4–6 Weather SummaryMostly dry. Freeze-thaw conditions (max 7°C on Tue night, min -1°C on Wed afternoon). Winds decreasing (fresh winds from the WNW on Wed afternoon, light winds from the N by Thu night). | |||||||||||||||||
Saturday 10 | Sunday 11 | Monday 12 | Tuesday 13 | Wednesday 14 | Thursday 15 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | | | | |  |  |  |  |  |  | | | | | | |
cloudy | light snow | mod. snow | light snow | light snow | mod. snow | light snow | heavy rain | mod. rain | rain shwrs | clear | clear | some clouds | cloudy | clear | clear | clear | clear | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
— | 5 | 9 | 5 | 3 | 6 | 5 | — | — | — | — | — | — | — | — | — | — | — | |
— | — | — | — | — | — | — | 13 | 6 | 0.1 | — | — | — | — | — | — | — | — | |
max °C | -1 | -2 | -2 | -1 | 0 | 1 | 1 | 3 | 3 | 5 | 6 | 7 | 3 | -1 | 1 | 2 | 5 | 6 |
min °C | -2 | -4 | -3 | -3 | -1 | 0 | 1 | 2 | 3 | 3 | 5 | 5 | 1 | -1 | -1 | 1 | 4 | 6 |
-11 | -12 | -9 | -11 | -9 | -8 | -7 | -4 | -3 | -1 | 2 | 0 | -5 | -8 | -8 | -3 | -1 | 2 | |
1850 | 1800 | 1600 | 1400 | 2100 | 2300 | 2400 | 2600 | 2650 | 2600 | 3150 | 3350 | 2650 | 2000 | 1450 | 2500 | 2800 | 3000 | |
Cloud base (m) | 3150 | 2800 | 600 | 600 | 600 | 600 | 600 | 600 | 700 | 650 | 750 | 800 | 650 | 8700 | 8850 | |||
 | 7:58 | — | — | 7:56 | — | — | 7:56 | — | — | 7:56 | — | — | 7:56 | — | — | 7:54 | — | — |
 | — | 4:32 | — | — | 4:34 | — | — | 4:35 | — | — | 4:37 | — | — | 4:37 | — | — | 4:39 | — |
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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 Sat afternoon. Becoming milder with moderate rain (total 18mm) on Mon afternoon. Freeze-thaw conditions (max 3°C on Mon afternoon, min -4°C on Sat afternoon). Mainly near gales.
South Twin Sister Weather (Days 3-6):
Mostly dry. Freeze-thaw conditions (max 7°C on Tue night, min -1°C on Wed afternoon). Winds decreasing (fresh winds from the WNW on Wed afternoon, light winds from the N by Thu 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.