– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 10 pm Thu 12 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 pm Thu 12 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 10 pm Thu 12 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 Thu night. Temperatures will be below freezing (max -5°C on Fri morning, min -9°C on Sat morning). Wind will be generally light. | Days 5–7 Weather SummaryA moderate fall of snow heaviest on Sun night. Turning milder with heavy rain (total 29mm), heaviest during Wed afternoon. Freeze-thaw conditions (max 4°C on Tue afternoon, min -3°C on Sun night). Winds decreasing (strong winds from the SSE on Mon night, light winds from the S by Tue night). | ||||||||||||||||||
Friday 13 | Saturday 14 | Sunday 15 | Monday 16 | Tuesday 17 | Wednesday 18 | ||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  | |  | |  |  |  | | | |  | | |  |  | |  |  | |
mod. snow | light snow | light snow | light snow | light snow | snow shwrs | some clouds | cloudy | cloudy | mod. snow | light snow | mod. rain | light snow | light snow | light rain | light rain | light rain | heavy rain | heavy rain | |
km/h | |||||||||||||||||||
 |  |  |  |  |  |  | |||||||||||||
9 | 4 | 1 | 4 | 3 | 2 | — | — | — | 6 | 1 | — | 4 | 1 | — | — | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | 8 | 4 | 0.1 | 0.1 | 0.1 | 1.2 | 14 | 14 | |
max °C | -6 | -5 | -5 | -5 | -9 | -8 | -7 | -5 | -5 | 0 | 1 | 3 | 3 | 3 | 4 | 3 | 4 | 4 | 5 |
min °C | -6 | -6 | -5 | -7 | -9 | -9 | -7 | -6 | -6 | -3 | 0 | 2 | 1 | 2 | 3 | 2 | 3 | 4 | 4 |
-10 | -10 | -8 | -12 | -16 | -17 | -10 | -8 | -12 | -10 | -7 | -4 | -6 | -4 | -2 | -2 | -2 | -1 | -2 | |
450 | 700 | 750 | 400 | 350 | 500 | 0 | 700 | 750 | 1100 | 2600 | 2000 | 2100 | 2100 | 2100 | 2050 | 2300 | 2250 | 2700 | |
Cloud base (m) | 600 | 550 | 550 | 550 | 700 | 700 | 1550 | 2250 | 1700 | 600 | 600 | 600 | 550 | 600 | 650 | 600 | 600 | 600 | 600 |
 | — | 7:26 | — | — | 7:22 | — | — | 7:20 | — | — | 7:18 | — | — | 7:16 | — | — | 7:15 | — | — |
 | — | — | 7:08 | — | — | 7:10 | — | — | 7:12 | — | — | 7:14 | — | — | 7:15 | — | — | 7:16 | — |
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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 night. Temperatures will be below freezing (max -5°C on Fri morning, min -9°C on Sat morning). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
A moderate fall of snow heaviest on Sun night. Turning milder with heavy rain (total 29mm), heaviest during Wed afternoon. Freeze-thaw conditions (max 4°C on Tue afternoon, min -3°C on Sun night). Winds decreasing (strong winds from the SSE on Mon night, light winds from the S 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.