– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 am Thu 12 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 am Thu 12 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Thu 12 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 Thu afternoon. Temperatures will be well below freezing (max -6°C on Thu night, min -9°C on Sat morning). Winds decreasing (strong winds from the W on Thu morning, calm by Sat night). | Days 4–6 Weather SummaryA moderate fall of snow heaviest on Sun night. Turning milder with heavy rain (total 21mm), heaviest during Mon night. Freeze-thaw conditions (max 6°C on Mon night, min -6°C on Sun morning). Winds increasing (calm on Sun morning, fresh winds from the SSE by Tue morning). | |||||||||||||||||
Thursday 12 | Friday 13 | Saturday 14 | Sunday 15 | Monday 16 | Tuesday 17 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  | | |  | | |  | |  |  |  | |  | |
light snow | mod. snow | heavy snow | snow shwrs | cloudy | snow shwrs | snow shwrs | snow shwrs | some clouds | cloudy | light snow | mod. snow | light snow | light rain | mod. rain | mod. rain | light rain | light rain | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
2 | 6 | 11 | 2 | — | 1 | 1 | 1 | — | — | 1 | 9 | 1 | — | — | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 5 | 6 | 1 | 4 | |
max °C | -7 | -7 | -6 | -6 | -6 | -6 | -9 | -8 | -7 | -5 | -5 | 0 | 2 | 3 | 6 | 4 | 4 | 5 |
min °C | -8 | -7 | -7 | -6 | -6 | -8 | -9 | -8 | -8 | -6 | -6 | -4 | 0 | 2 | 3 | 3 | 3 | 3 |
-17 | -16 | -12 | -9 | -9 | -14 | -16 | -15 | -13 | -6 | -10 | -10 | -5 | -3 | -3 | -3 | -2 | -2 | |
550 | 450 | 350 | 600 | 650 | 300 | 400 | 500 | 0 | 700 | 650 | 1050 | 2450 | 3150 | 2600 | 2250 | 2450 | 2450 | |
Cloud base (m) | 600 | 600 | 600 | 600 | 600 | 600 | 700 | 750 | 750 | 2450 | 950 | 600 | 600 | 600 | 600 | 700 | 900 | 600 |
 | 7:28 | — | — | 7:26 | — | — | 7:22 | — | — | 7:20 | — | — | 7:18 | — | — | 7:16 | — | — |
 | — | 7:07 | — | — | 7:08 | — | — | 7:10 | — | — | 7:12 | — | — | 7:14 | — | — | 7:15 | — |
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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 Thu afternoon. Temperatures will be well below freezing (max -6°C on Thu night, min -9°C on Sat morning). Winds decreasing (strong winds from the W on Thu morning, calm by Sat night).
South Twin Sister Weather (Days 3-6):
A moderate fall of snow heaviest on Sun night. Turning milder with heavy rain (total 21mm), heaviest during Mon night. Freeze-thaw conditions (max 6°C on Mon night, min -6°C on Sun morning). Winds increasing (calm on Sun morning, fresh winds from the SSE by Tue 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.