– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 pm Mon 09 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 pm Mon 09 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Mon 09 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 Mon afternoon. Freeze-thaw conditions (max 1°C on Wed night, min -9°C on Mon night). Winds increasing (light winds from the S on Tue morning, gales from the WSW by Wed night). | Days 5–7 Weather SummaryA heavy fall of snow, heaviest during Thu night. Temperatures will be below freezing (max -2°C on Sun morning, min -9°C on Fri night). Wind will be generally light. | ||||||||||||||||
Mon 9 | Tuesday 10 | Wednesday 11 | Thursday 12 | Friday 13 | Saturday 14 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  | | | | | | | | | | |  |  | |
mod. snow | mod. snow | snow shwrs | light snow | heavy snow | light snow | mod. snow | mod. snow | light snow | light snow | heavy snow | mod. snow | light snow | mod. snow | snow shwrs | cloudy | some clouds | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
10 | 9 | 1 | 4 | 12 | 3 | 7 | 7 | 2 | 5 | 16 | 8 | 1 | 6 | 2 | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -8 | -8 | -8 | -6 | -6 | -4 | -1 | 1 | -6 | -5 | -3 | -3 | -4 | -7 | -9 | -9 | -5 |
min °C | -8 | -9 | -9 | -7 | -6 | -6 | -4 | -6 | -6 | -5 | -4 | -3 | -6 | -9 | -9 | -9 | -8 |
-16 | -17 | -15 | -15 | -13 | -11 | -12 | -17 | -16 | -12 | -10 | -7 | -12 | -14 | -16 | -13 | -8 | |
450 | 200 | 450 | 550 | 550 | 750 | 1300 | 800 | 650 | 800 | 800 | 900 | 600 | 0 | 350 | 400 | 0 | |
Cloud base (m) | 600 | 600 | 600 | 800 | 600 | 600 | 550 | 600 | 750 | 600 | 550 | 550 | 550 | 600 | 650 | 650 | 650 |
 | — | — | 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 night). Winds increasing (light winds from the S on Tue morning, gales from the WSW by Wed night).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Thu night. Temperatures will be below freezing (max -2°C on Sun morning, min -9°C on Fri night). Wind will be generally light.
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.