– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 10 am Fri 16 Oct Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Fri 16 Oct Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryA light covering of new snow mostly falling on Sat morning. Freeze-thaw conditions (max 12°C on Fri morning, min -3°C on Sat morning). Winds decreasing (near gales from the SSW on Fri night, calm by Sun morning). | Days 4–6 Weather SummaryMostly dry. Freeze-thaw conditions (max 1°C on Wed afternoon, min -4°C on Mon night). Wind will be generally light. | |||||||||||||||||
Friday 16 | Saturday 17 | Sunday 18 | Monday 19 | Tuesday 20 | Wednesday 21 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  | |  |  | |  | |  | | | | | | | | |
clear | clear | snow shwrs | snow shwrs | clear | clear | some clouds | some clouds | some clouds | some clouds | cloudy | some clouds | some clouds | some clouds | clear | some clouds | clear | some clouds | |
Cloud base (m) | 8650 | 1750 | 700 | 900 | 1600 | 6300 | 4100 | 1550 | 2850 | 1700 | 1550 | 3250 | ||||||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | 2 | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
max °C | 12 | 11 | 9 | -1 | -2 | -1 | 0 | 1 | 2 | 0 | -1 | -3 | -4 | -2 | 0 | 0 | 1 | 1 |
min °C | 11 | 10 | 1 | -3 | -3 | -2 | -1 | 1 | 0 | -1 | -2 | -4 | -4 | -3 | -1 | 0 | 1 | -1 |
chill °C | 8 | 6 | -6 | -10 | -8 | -7 | -4 | 0 | -4 | -6 | -6 | -7 | -4 | -5 | -3 | 0 | 0 | -6 |
Freezing level m | 3800 | 3600 | 2600 | 1700 | 1800 | 1800 | 2200 | 2450 | 2400 | 1950 | 1800 | 1600 | 1500 | 1800 | 2100 | 2250 | 2300 | 2150 |
 | 7:28 | — | — | 7:30 | — | — | 7:31 | — | — | 7:33 | — | — | 7:35 | — | — | 7:35 | — | — |
 | — | 6:16 | — | — | 6:15 | — | — | 6:13 | — | — | 6:10 | — | — | 6:08 | — | — | 6:07 | — |
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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 Sat morning. Freeze-thaw conditions (max 12°C on Fri morning, min -3°C on Sat morning). Winds decreasing (near gales from the SSW on Fri night, calm by Sun morning).
South Twin Sister Weather (Days 3-6):
Mostly dry. Freeze-thaw conditions (max 1°C on Wed afternoon, min -4°C on Mon night). Wind will be generally light.
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.