– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 4 am Mon 12 Oct Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Mon 12 Oct Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryLight rain (total 6mm), mostly falling on Wed morning. Mild temperatures (max 7°C on Wed night, min 1°C on Mon morning). Wind will be generally light. | Days 4–6 Weather SummaryDrizzle on Fri night turning to light snow on Sat morning. Freeze-thaw conditions (max 10°C on Thu night, min -3°C on Sat night). Winds increasing (light winds from the S on Thu morning, strong winds from the SSW by Fri night). | |||||||||||||||||
Monday 12 | Tuesday 13 | Wednesday 14 | Thursday 15 | Friday 16 | Saturday 17 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  | |  |  |  |  |  | | | | |  |  |  |  | |
clear | clear | some clouds | cloudy | cloudy | light rain | light rain | rain shwrs | clear | some clouds | clear | clear | clear | clear | rain shwrs | light snow | snow shwrs | snow shwrs | |
Cloud base (m) | 9400 | 2950 | 2400 | 1650 | 950 | 600 | 700 | 6700 | 8500 | 9250 | 8250 | 8700 | 600 | 850 | 700 | |||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 5 | 1 | 1 |
mm | — | — | — | — | — | 1.6 | 4 | 0.2 | — | — | — | — | — | — | 1.7 | — | — | — |
max °C | 1 | 2 | 3 | 1 | 2 | 3 | 3 | 5 | 7 | 8 | 9 | 10 | 10 | 10 | 9 | 2 | 0 | -2 |
min °C | 1 | 2 | 2 | 1 | 2 | 2 | 3 | 5 | 5 | 8 | 8 | 10 | 10 | 10 | 3 | 1 | -1 | -3 |
chill °C | -2 | 0 | -3 | -3 | -2 | -2 | -1 | 2 | 3 | 6 | 6 | 8 | 7 | 7 | -3 | -4 | -7 | -10 |
Freezing level m | 2600 | 3250 | 2900 | 2600 | 2600 | 2850 | 2750 | 3500 | 3650 | 3750 | 3650 | 3700 | 3700 | 3650 | 3100 | 2350 | 1950 | 1700 |
 | 7:22 | — | — | 7:24 | — | — | 7:26 | — | — | 7:26 | — | — | 7:28 | — | — | 7:30 | — | — |
 | — | 6:24 | — | — | 6:22 | — | — | 6:21 | — | — | 6:19 | — | — | 6:16 | — | — | 6:15 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Light rain (total 6mm), mostly falling on Wed morning. Mild temperatures (max 7°C on Wed night, min 1°C on Mon morning). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Drizzle on Fri night turning to light snow on Sat morning. Freeze-thaw conditions (max 10°C on Thu night, min -3°C on Sat night). Winds increasing (light winds from the S on Thu morning, strong winds from the SSW by Fri 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.