– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 10 am Fri 28 Aug Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 am Fri 28 Aug Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Fri 28 Aug Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryLight rain (total 3mm) at first, then becoming colder with a dusting of snow on Sat afternoon. Freeze-thaw conditions (max 5°C on Fri afternoon, min 0°C on Sat morning). Wind will be generally light. | Days 4–6 Weather SummaryLight rain (total 9mm) on Tue night. Becoming colder with heavy fall of snow, heaviest during Wed morning. Freeze-thaw conditions (max 9°C on Mon afternoon, min -1°C on Wed night). Winds increasing (light winds from the SW on Mon morning, strong winds from the S by Tue night). | |||||||||||||||||
Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  |  |  |  | |  |  | | | | |  |  | | | |
rain shwrs | rain shwrs | light rain | some clouds | snow shwrs | some clouds | light rain | light rain | clear | clear | some clouds | some clouds | rain shwrs | light rain | light snow | heavy snow | snow shwrs | light snow | |
Cloud base (m) | 700 | 1800 | 600 | 750 | 1550 | 1550 | 800 | 700 | 2800 | 8950 | 2550 | 1950 | 1500 | 550 | 550 | 700 | 1600 | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | 4 | 14 | 2 | 1 |
mm | 0.3 | 0.1 | 2 | — | — | — | 0.3 | 0.3 | — | — | — | — | 0.1 | 0.7 | 8 | — | — | — |
max °C | 3 | 5 | 4 | 0 | 1 | 2 | 2 | 3 | 5 | 6 | 9 | 8 | 4 | 4 | 4 | 2 | 1 | 0 |
min °C | 3 | 5 | 1 | 0 | 1 | 1 | 2 | 2 | 3 | 6 | 8 | 5 | 4 | 4 | 2 | 1 | 1 | -1 |
chill °C | 0 | 2 | -2 | -4 | -2 | -2 | -1 | -2 | 0 | 5 | 5 | 1 | 0 | -1 | -5 | -6 | -5 | -7 |
Freezing level m | 2800 | 2850 | 2500 | 2200 | 2350 | 2400 | 2700 | 2950 | 3300 | 3400 | 3500 | 3200 | 2900 | 2800 | 2750 | 2250 | 2200 | 2000 |
 | 6:18 | — | — | 6:20 | — | — | 6:20 | — | — | 6:22 | — | — | 6:24 | — | — | 6:24 | — | — |
 | — | 7:58 | — | — | 7:55 | — | — | 7:53 | — | — | 7:52 | — | — | 7:50 | — | — | 7:47 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Light rain (total 3mm) at first, then becoming colder with a dusting of snow on Sat afternoon. Freeze-thaw conditions (max 5°C on Fri afternoon, min 0°C on Sat morning). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Light rain (total 9mm) on Tue night. Becoming colder with heavy fall of snow, heaviest during Wed morning. Freeze-thaw conditions (max 9°C on Mon afternoon, min -1°C on Wed night). Winds increasing (light winds from the SW on Mon morning, strong winds from the S by Tue night).
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.