– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 10 am Tue 22 Sep Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Tue 22 Sep Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryModerate rain (total 16mm), heaviest on Thu night. Mild temperatures (max 9°C on Thu afternoon, min 4°C on Wed morning). Wind will be generally light. | Days 4–6 Weather SummaryMild with light rain (total 5mm) on Fri morning Becoming colder with a light covering of snow, mostly falling on Fri morning. Mild temperatures (max 8°C on Sat night, min 1°C on Fri morning). Wind will be generally light. | |||||||||||||||||
Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | Saturday 26 | Sunday 27 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  | | |  |  |  |  |  | |  | | |  | |
clear | rain shwrs | some clouds | cloudy | light rain | rain shwrs | cloudy | light rain | heavy rain | light snow | snow shwrs | snow shwrs | some clouds | some clouds | cloudy | cloudy | some clouds | clear | |
Cloud base (m) | 700 | 1850 | 1900 | 2400 | 1950 | 7000 | 3250 | 1900 | 550 | 550 | 650 | 650 | 800 | 6100 | 3100 | 3100 | 9100 | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | 4 | 3 | 1 | — | — | — | — | — | — |
mm | — | 0.1 | — | — | 0.3 | 0.1 | — | 1.8 | 14 | 5 | — | — | — | — | — | — | — | — |
max °C | 7 | 8 | 7 | 5 | 6 | 7 | 8 | 9 | 6 | 4 | 1 | 2 | 1 | 5 | 8 | 7 | 8 | 8 |
min °C | 6 | 7 | 5 | 4 | 6 | 6 | 8 | 6 | 4 | 1 | 1 | 1 | 1 | 5 | 7 | 7 | 8 | 6 |
chill °C | 5 | 6 | 4 | 2 | 4 | 4 | 8 | 4 | 0 | -3 | -3 | -3 | 0 | 5 | 6 | 6 | 8 | 5 |
Freezing level m | 2900 | 2700 | 2450 | 2350 | 2500 | 3100 | 2850 | 2750 | 2350 | 1800 | 1700 | 1700 | 1850 | 2550 | 2950 | 2650 | 2550 | 2500 |
 | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:58 | — | — | 6:58 | — | — | 7:01 | — | — |
 | — | 7:06 | — | — | 7:04 | — | — | 7:01 | — | — | 7:00 | — | — | 6:58 | — | — | 6:54 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Moderate rain (total 16mm), heaviest on Thu night. Mild temperatures (max 9°C on Thu afternoon, min 4°C on Wed morning). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Mild with light rain (total 5mm) on Fri morning Becoming colder with a light covering of snow, mostly falling on Fri morning. Mild temperatures (max 8°C on Sat night, min 1°C on Fri morning). 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.