– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 3 am Wed 18 Feb Local TimeUpdates in: hr min sUpdate imminent
Issued: 3 am Wed 18 Feb Local Time
Updates in:
Update imminent hr min s
Issued: 3 am Wed 18 Feb Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryA moderate fall of snow, heaviest on Wed morning. Temperatures will be below freezing (max -2°C on Fri night, min -9°C on Thu night). Wind will be generally light. | Days 4–6 Weather SummaryA heavy fall of snow, heaviest during Mon afternoon. Freeze-thaw conditions (max 2°C on Sat night, min -4°C on Mon afternoon). Mainly strong winds. | |||||||||||||||||
Wednesday 18 | Thursday 19 | Friday 20 | Saturday 21 | Sunday 22 | Monday 23 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  | | |  | |  | | | |  |  |  |  | |
heavy snow | snow shwrs | some clouds | cloudy | clear | clear | cloudy | cloudy | cloudy | cloudy | some clouds | some clouds | cloudy | cloudy | light snow | light snow | mod. snow | heavy snow | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
11 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 1 | 9 | 15 | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -8 | -7 | -7 | -8 | -8 | -8 | -7 | -6 | -2 | -1 | 0 | 2 | 2 | 1 | 0 | -2 | -3 | -3 |
min °C | -8 | -8 | -7 | -8 | -8 | -9 | -8 | -7 | -6 | -1 | -1 | 1 | 2 | 1 | -2 | -2 | -4 | -4 |
-11 | -8 | -10 | -11 | -8 | -13 | -12 | -11 | -10 | -4 | -5 | -3 | -2 | -3 | -8 | -5 | -13 | -10 | |
400 | 500 | 0 | 250 | 400 | 0 | 300 | 550 | 0 | 1300 | 1400 | 1750 | 1800 | 1700 | 1150 | 1200 | 1050 | 950 | |
Cloud base (m) | 550 | 550 | 650 | 650 | 650 | 600 | 650 | 650 | 1650 | 2600 | 2800 | 600 | 2650 | 2300 | 550 | 850 | 550 | 600 |
 | 7:09 | — | — | 7:07 | — | — | 7:05 | — | — | 7:03 | — | — | 7:01 | — | — | 7:00 | — | — |
 | — | 5:34 | — | — | 5:35 | — | — | 5:37 | — | — | 5:38 | — | — | 5:39 | — | — | 5:42 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: A moderate fall of snow, heaviest on Wed morning. Temperatures will be below freezing (max -2°C on Fri night, min -9°C on Thu night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Mon afternoon. Freeze-thaw conditions (max 2°C on Sat night, min -4°C on Mon afternoon). Mainly strong winds.
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.