– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 am Mon 24 Aug Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 am Mon 24 Aug Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Mon 24 Aug Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryMostly dry. Very mild (max 15°C on Mon night, min 5°C on Wed night). Winds increasing (calm on Mon morning, fresh winds from the S by Wed night). | Days 4–6 Weather SummaryMild with light rain (total 7mm) on Thu afternoon Becoming colder with a light covering of snow, mostly falling on Sat morning. Freeze-thaw conditions (max 5°C on Thu afternoon, min 0°C on Sat morning). Wind will be generally light. | |||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  | | | | | |  |  | |  |  | |  |  |  | | |
clear | clear | clear | clear | clear | clear | clear | clear | some clouds | rain shwrs | rain shwrs | rain shwrs | light rain | rain shwrs | snow shwrs | light snow | snow shwrs | some clouds | |
Cloud base (m) | 9150 | 4750 | 9550 | 800 | 900 | 800 | 850 | 2000 | 600 | 650 | 1600 | |||||||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 3 | 1 | — |
mm | — | — | — | — | — | — | — | — | — | 1 | 2 | 0.3 | 0.1 | 1.6 | 1.7 | — | — | — |
max °C | 11 | 13 | 15 | 15 | 15 | 14 | 11 | 11 | 10 | 4 | 5 | 5 | 4 | 3 | 3 | 1 | 1 | 2 |
min °C | 10 | 13 | 14 | 15 | 15 | 12 | 11 | 11 | 5 | 4 | 4 | 4 | 3 | 3 | 1 | 0 | 1 | 1 |
chill °C | 10 | 13 | 13 | 14 | 14 | 10 | 8 | 8 | 1 | -1 | 1 | 2 | 0 | 0 | -2 | -3 | -2 | -3 |
Freezing level m | 4000 | 4100 | 4050 | 4100 | 4200 | 4100 | 4000 | 3900 | 3300 | 2750 | 2850 | 3050 | 2700 | 2650 | 2450 | 2200 | 2300 | 2350 |
 | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:18 | — | — | 6:20 | — | — |
 | — | — | 8:06 | — | — | 8:04 | — | — | 8:01 | — | — | 8:00 | — | 7:58 | — | — | 7:55 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Mostly dry. Very mild (max 15°C on Mon night, min 5°C on Wed night). Winds increasing (calm on Mon morning, fresh winds from the S by Wed night).
South Twin Sister Weather (Days 3-6):
Mild with light rain (total 7mm) on Thu afternoon Becoming colder with a light covering of snow, mostly falling on Sat morning. Freeze-thaw conditions (max 5°C on Thu afternoon, min 0°C on Sat morning). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 2134 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.