– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 10 am Fri 15 May Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 am Fri 15 May Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Fri 15 May 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 Fri afternoon. Temperatures will be below freezing (max -1°C on Sun afternoon, min -7°C on Fri night). Wind will be generally light. | Days 4–6 Weather SummaryA dusting of new snow. Freeze-thaw conditions (max 3°C on Wed night, min -2°C on Mon morning). Wind will be generally light. | |||||||||||||||||
Friday 15 | Saturday 16 | Sunday 17 | Monday 18 | Tuesday 19 | Wednesday 20 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  |  | |  | | |  | | | | |  |  | |
light snow | heavy snow | light snow | mod. snow | snow shwrs | snow shwrs | some clouds | some clouds | cloudy | some clouds | some clouds | some clouds | snow shwrs | snow shwrs | some clouds | some clouds | rain shwrs | rain shwrs | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
5 | 14 | 3 | 6 | 3 | 1 | — | — | — | — | — | — | 1 | 1 | — | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 0.1 | 0.1 | |
max °C | -6 | -5 | -6 | -7 | -5 | -4 | -3 | -1 | -1 | -2 | -1 | -2 | -1 | 0 | 1 | 0 | 2 | 3 |
min °C | -6 | -6 | -7 | -7 | -6 | -5 | -4 | -2 | -1 | -2 | -1 | -2 | -2 | -1 | -1 | 0 | 1 | 3 |
-12 | -13 | -13 | -14 | -12 | -11 | -10 | -2 | -3 | -5 | -5 | -7 | -6 | -4 | -6 | -3 | -3 | 0 | |
1200 | 1150 | 1100 | 1150 | 1400 | 1300 | 1450 | 1950 | 1900 | 1800 | 2000 | 1800 | 1850 | 2200 | 2100 | 2200 | 2550 | 3100 | |
Cloud base (m) | 600 | 550 | 650 | 600 | 600 | 600 | 750 | 850 | 2050 | 900 | 2400 | 650 | 1500 | 1650 | 2050 | 1800 | 1800 | 2300 |
 | 5:26 | — | — | 5:24 | — | — | 5:24 | — | — | 5:22 | — | — | 5:22 | — | — | 5:20 | — | — |
 | — | — | 8:42 | — | — | 8:43 | — | — | 8:44 | — | — | 8:45 | — | — | 8:46 | — | — | 8:47 |
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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 Fri afternoon. Temperatures will be below freezing (max -1°C on Sun afternoon, min -7°C on Fri night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
A dusting of new snow. Freeze-thaw conditions (max 3°C on Wed night, min -2°C on Mon morning). 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.