– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 9 pm Fri 30 Jan Local TimeUpdates in: hr min sUpdate imminent
Issued: 9 pm Fri 30 Jan Local Time
Updates in:
Update imminent hr min s
Issued: 9 pm Fri 30 Jan Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryMild at first with light rain (total 7mm) on Sat morning followed by colder weather and light fall of snow, heaviest on Sun morning. Freeze-thaw conditions (max 6°C on Sat afternoon, min -1°C on Sun afternoon). Winds decreasing (fresh winds from the S on Sat night, light winds from the SSE by Mon afternoon). | Days 5–7 Weather SummaryMostly dry. Very mild (max 11°C on Wed afternoon, min 1°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Saturday 31 | Sunday 1 | Monday 2 | Tuesday 3 | Wednesday 4 | Thursday 5 | ||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  | |  | |  | |  | | |  |  | | | | |
rain shwrs | mod. rain | some clouds | light snow | mod. snow | light snow | light snow | cloudy | some clouds | some clouds | cloudy | light rain | rain shwrs | some clouds | clear | clear | clear | clear | clear | |
km/h | |||||||||||||||||||
 |  |  |  |  |  |  | |||||||||||||
— | — | — | 2 | 10 | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | |
1.3 | 6 | — | 0.1 | — | — | — | — | — | — | — | 0.1 | 0.1 | — | — | — | — | — | — | |
max °C | 5 | 5 | 6 | 6 | 0 | 1 | 0 | -1 | 0 | 3 | 6 | 7 | 9 | 10 | 11 | 10 | 10 | 11 | 12 |
min °C | 3 | 5 | 6 | 1 | 0 | -1 | -1 | -1 | 0 | 1 | 5 | 7 | 8 | 10 | 10 | 9 | 9 | 10 | 11 |
0 | 2 | 2 | -6 | -6 | -5 | -7 | -7 | -3 | -1 | 2 | 4 | 6 | 8 | 9 | 7 | 8 | 9 | 10 | |
2150 | 2450 | 2350 | 2050 | 1500 | 1400 | 1400 | 1350 | 1500 | 2000 | 2450 | 2500 | 2700 | 3050 | 3200 | 3050 | 3150 | 3300 | 3400 | |
Cloud base (m) | 700 | 900 | 700 | 2250 | 800 | 600 | 600 | 750 | 650 | 1650 | 1700 | 2150 | 2500 | 6050 | 9000 | ||||
 | — | 7:37 | — | — | 7:37 | — | — | 7:35 | — | — | 7:33 | — | — | 7:33 | — | — | 7:31 | — | — |
 | — | — | 5:04 | — | — | 5:06 | — | — | 5:07 | — | — | 5:08 | — | — | 5:10 | — | — | 5:12 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Mild at first with light rain (total 7mm) on Sat morning followed by colder weather and light fall of snow, heaviest on Sun morning. Freeze-thaw conditions (max 6°C on Sat afternoon, min -1°C on Sun afternoon). Winds decreasing (fresh winds from the S on Sat night, light winds from the SSE by Mon afternoon).
South Twin Sister Weather (Days 3-6):
Mostly dry. Very mild (max 11°C on Wed afternoon, min 1°C on Mon 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.