– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 3 pm Mon 02 Nov Local Time
Updates in:
Update imminent hr min s
Issued: 3 pm Mon 02 Nov Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryA light covering of new snow mostly falling on Wed night. Freeze-thaw conditions (max 4°C on Mon afternoon, min -4°C on Wed night). Winds increasing (light winds from the WSW on Tue night, fresh winds from the SSW by Wed afternoon). | Days 5–7 Weather SummaryMild with moderate rain (total 11mm) on Fri night, Becoming colder with a light covering of snow, mostly falling on Sat night. Freeze-thaw conditions (max 7°C on Sat afternoon, min -2°C on Thu afternoon). Winds increasing (light winds from the WSW on Thu afternoon, stormy winds from the SSW by Sat night). | ||||||||||||||||
Mon 2 | Tuesday 3 | Wednesday 4 | Thursday 5 | Friday 6 | Saturday 7 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | | | |  |  |  | | | |  |  | | |  | |
some clouds | some clouds | cloudy | cloudy | some clouds | some clouds | light snow | snow shwrs | clear | some clouds | some clouds | light snow | light rain | heavy rain | some clouds | some clouds | light snow | |
Cloud base (m) | 5050 | 5000 | 2600 | 1750 | 1950 | 2350 | 600 | 700 | 950 | 3400 | 950 | 600 | 600 | 2350 | 2800 | ||
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
 cm | — | — | — | — | — | — | 1 | 6 | — | — | — | 1 | — | — | — | — | 2 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 0.3 | 10 | — | — | 0.8 |
max °C | 4 | 3 | 0 | 0 | 1 | 1 | 0 | -2 | -2 | -1 | 0 | 1 | 3 | 5 | 6 | 7 | 6 |
min °C | 4 | 1 | 0 | 0 | 0 | 0 | -2 | -4 | -3 | -2 | -2 | -1 | 2 | 2 | 5 | 6 | 1 |
chill °C | 0 | -3 | -4 | -4 | -4 | -4 | -10 | -10 | -7 | -6 | -8 | -7 | -4 | -4 | 0 | 0 | -8 |
Freezing level m | 2950 | 2700 | 2150 | 2100 | 2350 | 2250 | 2100 | 1650 | 1550 | 1700 | 2050 | 1550 | 2650 | 2700 | 3000 | 3150 | 2650 |
 | — | — | 6:56 | — | — | 6:58 | — | — | 7:01 | — | — | 7:01 | — | — | 7:03 | — | — |
 | 4:45 | — | — | 4:44 | — | — | 4:42 | — | — | 4:40 | — | — | 4:38 | — | — | 4:37 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: A light covering of new snow mostly falling on Wed night. Freeze-thaw conditions (max 4°C on Mon afternoon, min -4°C on Wed night). Winds increasing (light winds from the WSW on Tue night, fresh winds from the SSW by Wed afternoon).
South Twin Sister Weather (Days 3-6):
Mild with moderate rain (total 11mm) on Fri night, Becoming colder with a light covering of snow, mostly falling on Sat night. Freeze-thaw conditions (max 7°C on Sat afternoon, min -2°C on Thu afternoon). Winds increasing (light winds from the WSW on Thu afternoon, stormy winds from the SSW by Sat 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.