– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 am Mon 09 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 am Mon 09 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Mon 09 Mar 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 Mon afternoon. Freeze-thaw conditions (max 1°C on Wed night, min -9°C on Mon morning). Winds increasing (light winds from the SSW on Tue morning, near gales from the W by Wed night). | Days 4–6 Weather SummaryA heavy fall of snow, heaviest during Thu afternoon. Temperatures will be below freezing (max -4°C on Thu night, min -8°C on Sat morning). Winds decreasing (strong winds from the W on Thu morning, calm by Sat night). | |||||||||||||||||
Monday 9 | Tuesday 10 | Wednesday 11 | Thursday 12 | Friday 13 | Saturday 14 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | | | | | | | |  |  | |  |  | |  | | |
light snow | mod. snow | mod. snow | light snow | light snow | mod. snow | mod. snow | mod. snow | mod. snow | light snow | heavy snow | heavy snow | light snow | cloudy | some clouds | light snow | some clouds | some clouds | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
1 | 10 | 8 | 2 | 4 | 7 | 6 | 8 | 6 | 4 | 12 | 13 | 5 | — | — | 5 | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -8 | -8 | -8 | -8 | -6 | -5 | -4 | -1 | 1 | -6 | -5 | -4 | -4 | -5 | -6 | -7 | -7 | -5 |
min °C | -9 | -8 | -9 | -9 | -8 | -6 | -5 | -3 | -5 | -6 | -5 | -4 | -4 | -5 | -7 | -8 | -7 | -7 |
-16 | -16 | -17 | -16 | -16 | -13 | -11 | -11 | -15 | -16 | -11 | -9 | -9 | -10 | -11 | -13 | -11 | -10 | |
450 | 450 | 200 | 400 | 550 | 550 | 850 | 1350 | 850 | 650 | 750 | 750 | 800 | 700 | 350 | 450 | 600 | 0 | |
Cloud base (m) | 850 | 600 | 600 | 600 | 800 | 600 | 550 | 550 | 600 | 600 | 600 | 550 | 550 | 550 | 600 | 600 | 650 | 600 |
 | 7:33 | — | — | 7:31 | — | — | 7:30 | — | — | 7:28 | — | — | 7:26 | — | — | 7:22 | — | — |
 | — | 7:02 | — | — | 7:05 | — | — | 7:06 | — | — | 7:07 | — | — | 7:08 | — | — | 7:10 | — |
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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 Mon afternoon. Freeze-thaw conditions (max 1°C on Wed night, min -9°C on Mon morning). Winds increasing (light winds from the SSW on Tue morning, near gales from the W by Wed night).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Thu afternoon. Temperatures will be below freezing (max -4°C on Thu night, min -8°C on Sat morning). Winds decreasing (strong winds from the W on Thu morning, calm by Sat 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.