– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 3 pm Fri 09 Jan Local TimeUpdates in: hr min sUpdate imminent
Issued: 3 pm Fri 09 Jan Local Time
Updates in:
Update imminent hr min s
Issued: 3 pm Fri 09 Jan 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 Sun night. Freeze-thaw conditions (max 1°C on Sun afternoon, min -3°C on Sat afternoon). Winds increasing (moderate winds from the WSW on Fri afternoon, near gales from the SW by Sun night). | Days 5–7 Weather SummaryA dusting of new snow. Freeze-thaw conditions (max 7°C on Tue night, min -2°C on Wed afternoon). Winds decreasing (strong winds from the SSW on Wed morning, light winds from the N by Thu morning). | ||||||||||||||||
Fri 9 | Saturday 10 | Sunday 11 | Monday 12 | Tuesday 13 | Wednesday 14 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  | | |  | |  |  | |  |  | |  | | |
some clouds | cloudy | cloudy | light snow | light snow | light snow | light snow | heavy snow | light snow | rain shwrs | light rain | some clouds | clear | clear | some clouds | snow shwrs | clear | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
— | — | — | 2 | 4 | 3 | 4 | 15 | 4 | — | — | — | — | — | — | 4 | — | |
— | — | — | — | — | — | — | — | — | 0.1 | 0.5 | — | — | — | — | — | — | |
max °C | -1 | 0 | -1 | -2 | -2 | -1 | 1 | 0 | 1 | 3 | 4 | 5 | 6 | 7 | 3 | -1 | 1 |
min °C | -2 | -1 | -2 | -3 | -3 | -2 | 0 | 0 | 0 | 2 | 3 | 3 | 5 | 4 | 0 | -2 | -1 |
-8 | -8 | -11 | -10 | -10 | -10 | -8 | -8 | -8 | -5 | -3 | -1 | 1 | -1 | -7 | -9 | -8 | |
1650 | 2050 | 1950 | 1500 | 1750 | 1650 | 2350 | 2150 | 2200 | 2450 | 2650 | 2600 | 3250 | 3200 | 2700 | 1850 | 1500 | |
Cloud base (m) | 650 | 4150 | 2700 | 2350 | 650 | 600 | 600 | 600 | 650 | 600 | 800 | 750 | 1600 | 1600 | 700 | ||
 | — | — | 7:58 | — | — | 7:56 | — | — | 7:56 | — | — | 7:56 | — | — | 7:56 | — | — |
 | 4:30 | — | — | 4:32 | — | — | 4:34 | — | — | 4:35 | — | — | 4:37 | — | — | 4:37 | — |
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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 Sun night. Freeze-thaw conditions (max 1°C on Sun afternoon, min -3°C on Sat afternoon). Winds increasing (moderate winds from the WSW on Fri afternoon, near gales from the SW by Sun night).
South Twin Sister Weather (Days 3-6):
A dusting of new snow. Freeze-thaw conditions (max 7°C on Tue night, min -2°C on Wed afternoon). Winds decreasing (strong winds from the SSW on Wed morning, light winds from the N 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.