– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 3 pm Sun 07 Dec Local TimeUpdates in: hr min sUpdate imminent
Issued: 3 pm Sun 07 Dec Local Time
Updates in:
Update imminent hr min s
Issued: 3 pm Sun 07 Dec Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryHeavy rain (total 31mm) on Mon night. Becoming colder with heavy fall of snow, heaviest during Mon night. Freeze-thaw conditions (max 4°C on Mon afternoon, min -2°C on Mon night). Winds decreasing (strong winds from the WSW on Sun afternoon, light winds from the S by Tue morning). | Days 5–7 Weather SummaryA moderate fall of snow heaviest on Wed night. Turning milder with heavy rain (total 39mm), heaviest during Fri night. Freeze-thaw conditions (max 4°C on Fri morning, min -1°C on Wed afternoon). Winds increasing (light winds from the WSW on Thu afternoon, strong winds from the WSW by Fri morning). | ||||||||||||||||
Sun 7 | Monday 8 | Tuesday 9 | Wednesday 10 | Thursday 11 | Friday 12 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | |  | | |  | | | | | |  | |  | |
snow shwrs | light snow | light snow | heavy rain | light snow | cloudy | cloudy | light snow | mod. snow | light snow | light snow | light snow | light snow | light snow | light rain | heavy rain | heavy rain | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
2 | 3 | 2 | — | 4 | — | — | 5 | 6 | 1 | 5 | 4 | 3 | 2 | — | — | — | |
— | — | — | 11 | 13 | — | — | 7 | — | — | — | — | — | 2 | 2 | 12 | 20 | |
max°C | 0 | 0 | 2 | 4 | 3 | -1 | 0 | 3 | -1 | -1 | 0 | 1 | 1 | 3 | 4 | 3 | 3 |
min°C | -1 | -1 | 1 | 4 | -2 | -2 | -2 | 1 | -1 | -1 | 0 | 1 | 0 | 0 | 4 | 2 | 2 |
-8 | -6 | -6 | -2 | -7 | -6 | -7 | -4 | -7 | -6 | -5 | -3 | -3 | -3 | -2 | -4 | -1 | |
1550 | 1300 | 1700 | 2200 | 1250 | 1200 | 1500 | 2200 | 1400 | 1400 | 1450 | 1650 | 1600 | 1750 | 2200 | 2000 | 2050 | |
Cloud base (m) | 600 | 750 | 600 | 550 | 600 | 600 | 2250 | 550 | 550 | 600 | 600 | 600 | 600 | 600 | 600 | 550 | 600 |
 | — | — | 7:47 | — | — | 7:48 | — | — | 7:48 | — | — | 7:50 | — | — | 7:50 | — | — |
 | 4:12 | — | — | 4:10 | — | — | 4:10 | — | — | 4:10 | — | — | 4:10 | — | — | 4:10 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Heavy rain (total 31mm) on Mon night. Becoming colder with heavy fall of snow, heaviest during Mon night. Freeze-thaw conditions (max 4°C on Mon afternoon, min -2°C on Mon night). Winds decreasing (strong winds from the WSW on Sun afternoon, light winds from the S by Tue morning).
South Twin Sister Weather (Days 3-6):
A moderate fall of snow heaviest on Wed night. Turning milder with heavy rain (total 39mm), heaviest during Fri night. Freeze-thaw conditions (max 4°C on Fri morning, min -1°C on Wed afternoon). Winds increasing (light winds from the WSW on Thu afternoon, strong winds from the WSW by Fri 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.