– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 pm Thu 12 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 pm Thu 12 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Thu 12 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 Thu afternoon. Temperatures will be below freezing (max -5°C on Fri afternoon, min -9°C on Sat morning). Wind will be generally light. | Days 5–7 Weather SummaryA heavy fall of snow, heaviest during Mon afternoon. Becoming milder with heavy rain (total 21mm) on Wed morning. Freeze-thaw conditions (max 5°C on Wed morning, min -6°C on Sun afternoon). Winds increasing (light winds from the S on Sun afternoon, strong winds from the S by Mon night). | ||||||||||||||||
Thu 12 | Friday 13 | Saturday 14 | Sunday 15 | Monday 16 | Tuesday 17 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | | |  |  | | |  | | | |  |  |  | |
heavy snow | mod. snow | light snow | cloudy | mod. snow | light snow | snow shwrs | some clouds | cloudy | cloudy | light snow | light snow | light snow | mod. snow | light rain | mod. rain | mod. rain | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
12 | 9 | 2 | — | 7 | 1 | 2 | — | — | — | 5 | 3 | 5 | 7 | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | 1.1 | 5 | 5 | |
max °C | -7 | -6 | -6 | -5 | -6 | -9 | -8 | -7 | -5 | -5 | -1 | 1 | 1 | 2 | 3 | 4 | 4 |
min °C | -7 | -7 | -6 | -6 | -8 | -9 | -9 | -8 | -7 | -6 | -4 | 0 | 1 | 1 | 3 | 4 | 4 |
-15 | -10 | -9 | -10 | -15 | -16 | -17 | -12 | -7 | -12 | -11 | -6 | -6 | -6 | -3 | -1 | 0 | |
500 | 400 | 650 | 650 | 400 | 300 | 500 | 0 | 650 | 700 | 1100 | 1850 | 1950 | 2050 | 2100 | 2150 | 2300 | |
Cloud base (m) | 600 | 600 | 550 | 550 | 550 | 750 | 700 | 950 | 2450 | 1650 | 600 | 600 | 600 | 600 | 600 | 600 | 600 |
 | — | — | 7:26 | — | — | 7:22 | — | — | 7:20 | — | — | 7:18 | — | — | 7:16 | — | — |
 | 7:07 | — | — | 7:08 | — | — | 7:10 | — | — | 7:12 | — | — | 7:14 | — | — | 7:15 | — |
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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 Thu afternoon. Temperatures will be below freezing (max -5°C on Fri afternoon, min -9°C on Sat morning). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Mon afternoon. Becoming milder with heavy rain (total 21mm) on Wed morning. Freeze-thaw conditions (max 5°C on Wed morning, min -6°C on Sun afternoon). Winds increasing (light winds from the S on Sun afternoon, strong winds from the S by Mon night).
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.