– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 pm Mon 23 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 pm Mon 23 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Mon 23 Mar 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 Tue night. Freeze-thaw conditions (max 2°C on Mon night, min -8°C on Wed night). Winds increasing (calm on Mon afternoon, near gales from the S by Tue afternoon). | Days 5–7 Weather SummaryA dusting of snow on Thu afternoon. Freezing level rising with drizzle on Sun morning. Freeze-thaw conditions (max 4°C on Fri night, min -6°C on Thu afternoon). Winds increasing (calm on Thu night, fresh winds from the SSE by Sun morning). | ||||||||||||||||
Mon 23 | Tuesday 24 | Wednesday 25 | Thursday 26 | Friday 27 | Saturday 28 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  | | | | |  |  |  | |  | | |  | |
cloudy | light snow | mod. snow | light snow | mod. snow | mod. snow | mod. snow | mod. snow | light snow | snow shwrs | clear | some clouds | some clouds | cloudy | cloudy | some clouds | some clouds | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
— | 1 | 6 | 1 | 9 | 6 | 8 | 8 | 3 | 2 | — | — | — | — | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | 1 | 2 | 1 | 2 | 0 | -4 | -4 | -7 | -7 | -5 | -3 | 0 | 1 | 4 | 4 | 3 | 4 |
min °C | 1 | -2 | -2 | 1 | -3 | -5 | -6 | -8 | -7 | -6 | -4 | -1 | 0 | 2 | 4 | 3 | 3 |
1 | -9 | -8 | -6 | -12 | -11 | -16 | -16 | -13 | -10 | -7 | -3 | -2 | 1 | 2 | 1 | 0 | |
1700 | 1650 | 1950 | 1800 | 1100 | 900 | 750 | 0 | 600 | 900 | 0 | 1550 | 1650 | 2200 | 2150 | 2000 | 2050 | |
Cloud base (m) | 4950 | 2750 | 550 | 550 | 550 | 550 | 600 | 850 | 650 | 650 | 850 | 600 | 900 | 600 | 600 | 3200 | |
 | — | — | 7:03 | — | — | 7:01 | — | — | 6:58 | — | — | 6:56 | — | — | 6:54 | — | — |
 | 7:23 | — | — | 7:25 | — | — | 7:27 | — | — | 7:29 | — | — | 7:30 | — | — | 7:31 | — |
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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 Tue night. Freeze-thaw conditions (max 2°C on Mon night, min -8°C on Wed night). Winds increasing (calm on Mon afternoon, near gales from the S by Tue afternoon).
South Twin Sister Weather (Days 3-6):
A dusting of snow on Thu afternoon. Freezing level rising with drizzle on Sun morning. Freeze-thaw conditions (max 4°C on Fri night, min -6°C on Thu afternoon). Winds increasing (calm on Thu night, fresh winds from the SSE by Sun morning).
This table gives the weather forecast for South Twin Sister at the specific elevation of 1500 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.