– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 9 pm Wed 11 Nov Local Time
Updates in:
Update imminent hr min s
Issued: 9 pm Wed 11 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 Fri night. Freeze-thaw conditions (max 6°C on Thu afternoon, min -3°C on Fri night). Winds decreasing (near gales from the S on Wed night, light winds from the SSE by Fri afternoon). | Days 5–7 Weather SummaryA heavy fall of snow, heaviest during Sun morning. Temperatures will be below freezing (max -1°C on Sat night, min -6°C on Sun night). Winds decreasing (near gales from the SSW on Sat night, light winds from the SSW by Mon night). | |||||||||||||||
Thursday 12 | Friday 13 | Saturday 14 | Sunday 15 | Monday 16 | ||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  | | |  |  |  | | |  |  | | | | |  | |
cloudy | cloudy | cloudy | cloudy | light rain | light snow | light snow | light snow | cloudy | mod. snow | mod. snow | mod. snow | mod. snow | cloudy | light snow | some clouds | |
Cloud base (m) | 2200 | 5300 | 5500 | 5200 | 2600 | 2100 | 650 | 650 | 550 | 550 | 550 | 550 | 550 | 650 | 650 | 800 |
km/h | ||||||||||||||||
 |  |  |  |  |  | |||||||||||
 cm | — | — | — | — | — | 3 | 5 | 1 | — | 6 | 8 | 6 | 6 | — | 1 | — |
mm | — | — | — | — | 0.2 | — | — | — | — | — | — | — | — | — | — | — |
max °C | 4 | 4 | 6 | 6 | 3 | 0 | -1 | -3 | -2 | -1 | -2 | -4 | -4 | -5 | -5 | -4 |
min °C | 3 | 3 | 5 | 4 | 2 | -1 | -3 | -3 | -3 | -1 | -3 | -4 | -6 | -6 | -5 | -5 |
chill °C | -4 | -4 | -1 | -2 | -5 | -5 | -11 | -11 | -10 | -9 | -12 | -13 | -15 | -15 | -12 | -10 |
Freezing level m | 2750 | 2550 | 2700 | 2900 | 2400 | 2200 | 1900 | 1650 | 1650 | 2000 | 1800 | 1450 | 1350 | 1300 | 1350 | 1350 |
 | — | 7:11 | — | — | 7:13 | — | — | 7:15 | — | — | 7:16 | — | — | 7:18 | — | — |
 | — | — | 4:30 | — | — | 4:30 | — | — | 4:29 | — | — | 4:27 | — | — | 4:25 | — |
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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 Fri night. Freeze-thaw conditions (max 6°C on Thu afternoon, min -3°C on Fri night). Winds decreasing (near gales from the S on Wed night, light winds from the SSE by Fri afternoon).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Sun morning. Temperatures will be below freezing (max -1°C on Sat night, min -6°C on Sun night). Winds decreasing (near gales from the SSW on Sat night, light winds from the SSW by Mon 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.