– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 10 am Sat 21 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 am Sat 21 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Sat 21 Mar Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryA dusting of new snow. Freeze-thaw conditions (max 1°C on Mon morning, min -5°C on Sat morning). Wind will be generally light. | Days 4–6 Weather SummaryA heavy fall of snow, heaviest during Tue night. Freeze-thaw conditions (max 1°C on Tue afternoon, min -7°C on Wed night). Winds decreasing (strong winds from the S on Tue afternoon, calm by Thu night). | |||||||||||||||||
Saturday 21 | Sunday 22 | Monday 23 | Tuesday 24 | Wednesday 25 | Thursday 26 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  | | | | | |  |  |  |  | | | | | |  | |
some clouds | some clouds | some clouds | some clouds | some clouds | some clouds | some clouds | some clouds | light snow | mod. snow | light snow | heavy snow | light snow | mod. snow | heavy snow | light snow | light snow | snow shwrs | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
— | — | — | — | — | — | — | — | 1 | 6 | 2 | 17 | 1 | 6 | 12 | 3 | 2 | 1 | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -5 | -4 | -4 | -5 | -3 | 0 | 1 | 1 | 1 | -1 | 1 | -1 | -5 | -4 | -5 | -6 | -4 | -3 |
min °C | -5 | -4 | -5 | -5 | -4 | -2 | 0 | 0 | -2 | -2 | 1 | -5 | -5 | -4 | -7 | -6 | -5 | -4 |
-10 | -8 | -9 | -9 | -6 | -2 | 0 | 0 | -8 | -8 | -6 | -12 | -13 | -11 | -15 | -12 | -12 | -8 | |
850 | 1000 | 700 | 900 | 1100 | 1450 | 1550 | 1650 | 1700 | 1250 | 1700 | 800 | 850 | 900 | 500 | 750 | 950 | 0 | |
Cloud base (m) | 650 | 700 | 2000 | 600 | 650 | 600 | 5500 | 5100 | 2750 | 550 | 550 | 600 | 600 | 600 | 600 | 650 | 650 | 650 |
 | 7:09 | — | — | 7:07 | — | — | 7:05 | — | — | 7:03 | — | — | 7:01 | — | — | 6:58 | — | — |
 | — | 7:21 | — | — | 7:22 | — | — | 7:23 | — | — | 7:25 | — | — | 7:27 | — | — | 7:29 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: A dusting of new snow. Freeze-thaw conditions (max 1°C on Mon morning, min -5°C on Sat morning). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Tue night. Freeze-thaw conditions (max 1°C on Tue afternoon, min -7°C on Wed night). Winds decreasing (strong winds from the S on Tue afternoon, calm by Thu 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.