– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 10 pm Wed 11 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 pm Wed 11 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 10 pm Wed 11 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 afternoon. Freeze-thaw conditions (max 1°C on Wed night, min -9°C on Sat morning). Winds decreasing (severe gales from the W on Wed night, calm by Fri morning). | Days 5–7 Weather SummaryA light fall of snow, heaviest on Sun night. Turning milder with light rain (total 6mm) on Mon afternoon. Freeze-thaw conditions (max 7°C on Mon night, min -7°C on Sat night). Wind will be generally light. | ||||||||||||||||||
Thursday 12 | Friday 13 | Saturday 14 | Sunday 15 | Monday 16 | Tuesday 17 | ||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | |  |  |  |  |  | | | |  | |  | | |  | |
mod. snow | light snow | mod. snow | heavy snow | light snow | cloudy | snow shwrs | snow shwrs | some clouds | some clouds | cloudy | light snow | heavy snow | light rain | light rain | rain shwrs | cloudy | light rain | cloudy | |
km/h | |||||||||||||||||||
 |  |  |  |  |  |  | |||||||||||||
9 | 2 | 10 | 14 | 2 | — | 1 | 3 | — | — | — | 1 | 12 | — | — | — | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | 0.3 | 4 | 2 | — | 0.2 | — | |
max °C | 1 | -7 | -7 | -7 | -7 | -6 | -6 | -9 | -8 | -7 | -5 | -5 | -1 | 2 | 4 | 7 | 6 | 7 | 8 |
min °C | -7 | -8 | -7 | -7 | -7 | -6 | -8 | -9 | -8 | -7 | -6 | -6 | -3 | 1 | 3 | 5 | 6 | 7 | 7 |
-18 | -18 | -16 | -14 | -10 | -9 | -13 | -16 | -15 | -11 | -9 | -11 | -9 | -3 | -2 | 1 | 3 | 4 | 5 | |
650 | 500 | 500 | 350 | 600 | 650 | 0 | 400 | 500 | 0 | 700 | 700 | 1350 | 2800 | 3150 | 2950 | 2950 | 2900 | 2700 | |
Cloud base (m) | 600 | 600 | 600 | 600 | 600 | 550 | 600 | 700 | 750 | 700 | 2350 | 1000 | 600 | 600 | 600 | 600 | 950 | 750 | 3450 |
 | — | 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. Freeze-thaw conditions (max 1°C on Wed night, min -9°C on Sat morning). Winds decreasing (severe gales from the W on Wed night, calm by Fri morning).
South Twin Sister Weather (Days 3-6):
A light fall of snow, heaviest on Sun night. Turning milder with light rain (total 6mm) on Mon afternoon. Freeze-thaw conditions (max 7°C on Mon night, min -7°C on Sat 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.