– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 9 am Sun 11 Jan Local TimeUpdates in: hr min sUpdate imminent
Issued: 9 am Sun 11 Jan Local Time
Updates in:
Update imminent hr min s
Issued: 9 am Sun 11 Jan Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryA light covering of new snow mostly falling on Sun morning will be washed away by heavy rain (total 43mm) on Mon morning. Freeze-thaw conditions (max 10°C on Tue afternoon, min 0°C on Sun morning). Winds decreasing (strong winds from the S on Sun night, calm by Tue morning). | Days 4–6 Weather SummaryMostly dry. Very mild (max 11°C on Thu night, min 3°C on Wed night). Wind will be generally light. | |||||||||||||||||
Sunday 11 | Monday 12 | Tuesday 13 | Wednesday 14 | Thursday 15 | Friday 16 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  | |  |  |  |  |  | |  | | | | | | | |
light snow | light snow | heavy rain | heavy rain | heavy rain | rain shwrs | some clouds | clear | clear | light rain | light rain | some clouds | clear | clear | clear | clear | clear | clear | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
3 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
— | 1.8 | 12 | 12 | 11 | 6 | — | — | — | 0.1 | 0.4 | — | — | — | — | — | — | — | |
max °C | 2 | 2 | 5 | 5 | 6 | 7 | 8 | 10 | 10 | 8 | 4 | 4 | 6 | 9 | 11 | 11 | 11 | 11 |
min °C | 0 | 2 | 3 | 5 | 6 | 6 | 7 | 9 | 9 | 6 | 4 | 3 | 3 | 8 | 10 | 11 | 11 | 11 |
-7 | -5 | -4 | 1 | 2 | 2 | 6 | 9 | 7 | 4 | 2 | 3 | 0 | 7 | 9 | 11 | 11 | 11 | |
1500 | 2100 | 2200 | 2450 | 2550 | 2750 | 2700 | 3200 | 3450 | 2850 | 2350 | 3100 | 3300 | 3300 | 3400 | 3550 | 3700 | 3700 | |
Cloud base (m) | 600 | 600 | 600 | 650 | 600 | 600 | 700 | 850 | 2100 | 800 | 800 | |||||||
 | 7:56 | — | — | 7:56 | — | — | 7:56 | — | — | 7:56 | — | — | 7:54 | — | — | 7:54 | — | — |
 | — | 4:34 | — | — | 4:35 | — | — | 4:37 | — | — | 4:37 | — | — | 4:39 | — | — | 4:40 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: A light covering of new snow mostly falling on Sun morning will be washed away by heavy rain (total 43mm) on Mon morning. Freeze-thaw conditions (max 10°C on Tue afternoon, min 0°C on Sun morning). Winds decreasing (strong winds from the S on Sun night, calm by Tue morning).
South Twin Sister Weather (Days 3-6):
Mostly dry. Very mild (max 11°C on Thu night, min 3°C on Wed 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.