– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 pm Mon 11 May Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 pm Mon 11 May Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Mon 11 May Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryMild at first with light rain (total 8mm) on Tue night followed by colder weather and light fall of snow, heaviest on Wed morning. Freeze-thaw conditions (max 12°C on Tue afternoon, min -3°C on Wed night). Winds increasing (calm on Mon afternoon, fresh winds from the W by Wed night). | Days 5–7 Weather SummaryA heavy fall of snow, heaviest during Fri afternoon. Temperatures will be below freezing (max -1°C on Thu afternoon, min -6°C on Fri night). Wind will be generally light. | ||||||||||||||||
Mon 11 | Tuesday 12 | Wednesday 13 | Thursday 14 | Friday 15 | Saturday 16 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  | |  |  |  |  |  | |  |  | | | |  | |  | |
some clouds | clear | some clouds | rain shwrs | mod. rain | mod. snow | light snow | mod. snow | some clouds | cloudy | heavy snow | light snow | mod. snow | heavy snow | snow shwrs | snow shwrs | snow shwrs | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
— | — | — | — | — | 8 | 2 | 6 | — | — | 11 | 1 | 8 | 16 | 3 | 3 | 1 | |
— | — | — | 0.2 | 8 | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | 6 | 10 | 10 | 12 | 9 | 1 | -2 | -2 | -2 | -1 | -3 | -4 | -5 | -6 | -6 | -4 | -5 |
min °C | 5 | 7 | 10 | 11 | 3 | -1 | -2 | -3 | -3 | -1 | -4 | -5 | -5 | -6 | -6 | -5 | -6 |
4 | 6 | 8 | 8 | -2 | -6 | -8 | -11 | -10 | -7 | -10 | -11 | -12 | -13 | -12 | -11 | -10 | |
3150 | 3450 | 3700 | 3550 | 3000 | 1950 | 1700 | 1600 | 1750 | 1950 | 1450 | 1400 | 1250 | 1200 | 1250 | 1450 | 1150 | |
Cloud base (m) | 6850 | 5900 | 6050 | 1950 | 550 | 600 | 600 | 700 | 2000 | 600 | 650 | 600 | 600 | 600 | 850 | 600 | |
 | — | — | 5:31 | — | — | 5:28 | — | — | 5:28 | — | — | 5:26 | — | — | 5:24 | — | — |
 | — | 8:36 | — | — | 8:37 | — | — | 8:38 | — | — | 8:39 | — | — | 8:42 | — | — | 8:43 |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Mild at first with light rain (total 8mm) on Tue night followed by colder weather and light fall of snow, heaviest on Wed morning. Freeze-thaw conditions (max 12°C on Tue afternoon, min -3°C on Wed night). Winds increasing (calm on Mon afternoon, fresh winds from the W by Wed night).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Fri afternoon. Temperatures will be below freezing (max -1°C on Thu afternoon, min -6°C on Fri night). Wind will be generally light.
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.