– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 9 am Fri 06 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 9 am Fri 06 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 9 am Fri 06 Mar Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryDrizzle on Sat afternoon followed by colder weather and a heavy fall of snow, heaviest during Sat night. Freeze-thaw conditions (max 4°C on Fri night, min -8°C on Sun night). Winds increasing (light winds from the S on Fri morning, fresh winds from the WSW by Sat night). | Days 4–6 Weather SummaryA heavy fall of snow, heaviest during Wed afternoon. Temperatures will be below freezing (max -3°C on Wed morning, min -9°C on Mon morning). Winds increasing (light winds from the SSW on Tue morning, strong winds from the SSW by Tue night). | |||||||||||||||||
Friday 6 | Saturday 7 | Sunday 8 | Monday 9 | Tuesday 10 | Wednesday 11 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  | |  |  | |  |  |  |  | | | | |  | | |
light snow | light snow | light snow | light rain | light rain | snow shwrs | some clouds | light snow | heavy snow | snow shwrs | mod. snow | mod. snow | light snow | light snow | heavy snow | mod. snow | heavy snow | mod. snow | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
2 | 3 | 1 | — | — | 14 | — | 4 | 17 | 2 | 6 | 7 | 4 | 2 | 16 | 10 | 13 | 10 | |
— | — | 0.1 | 0.3 | 0.7 | 0.1 | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | 0 | 1 | 4 | 4 | 4 | 4 | -4 | -6 | -7 | -8 | -7 | -8 | -8 | -6 | -4 | -3 | -3 | -4 |
min °C | 0 | 1 | 2 | 4 | 3 | -2 | -6 | -7 | -8 | -9 | -8 | -9 | -8 | -7 | -5 | -4 | -3 | -7 |
-4 | -3 | -2 | 0 | -2 | -10 | -14 | -14 | -16 | -16 | -16 | -18 | -14 | -15 | -14 | -11 | -9 | -16 | |
1500 | 1750 | 2500 | 2300 | 2200 | 1850 | 950 | 650 | 450 | 450 | 500 | 150 | 400 | 600 | 650 | 900 | 1000 | 750 | |
Cloud base (m) | 600 | 600 | 600 | 650 | 600 | 550 | 600 | 600 | 550 | 600 | 700 | 600 | 700 | 600 | 600 | 600 | 550 | 600 |
 | 6:39 | — | — | 6:37 | — | — | 7:35 | — | — | 6:33 | — | — | 6:31 | — | — | 6:28 | — | — |
 | — | 5:59 | — | — | 6:00 | — | — | 7:01 | — | — | 6:04 | — | — | 6:05 | — | — | 6:07 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Drizzle on Sat afternoon followed by colder weather and a heavy fall of snow, heaviest during Sat night. Freeze-thaw conditions (max 4°C on Fri night, min -8°C on Sun night). Winds increasing (light winds from the S on Fri morning, fresh winds from the WSW by Sat night).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Wed afternoon. Temperatures will be below freezing (max -3°C on Wed morning, min -9°C on Mon morning). Winds increasing (light winds from the SSW on Tue morning, strong winds from the SSW by Tue 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.