– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 9 pm Thu 29 Jan Local TimeUpdates in: hr min sUpdate imminent
Issued: 9 pm Thu 29 Jan Local Time
Updates in:
Update imminent hr min s
Issued: 9 pm Thu 29 Jan Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryA heavy fall of snow, heaviest during Thu night. Freeze-thaw conditions (max 2°C on Sat morning, min -4°C on Sun morning). Winds increasing (light winds from the WSW on Fri night, near gales from the S by Sun morning). | Days 5–7 Weather SummaryA moderate fall of snow, heaviest on Sun night. Freeze-thaw conditions (max 5°C on Tue afternoon, min -5°C on Sun night). Winds decreasing (strong winds from the SSW on Sun night, light winds from the SW by Tue morning). | ||||||||||||||||||
Friday 30 | Saturday 31 | Sunday 1 | Monday 2 | Tuesday 3 | Wednesday 4 | ||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | |  |  |  | |  | |  |  | |  |  | |  | | |
heavy snow | mod. snow | light snow | snow shwrs | light snow | some clouds | cloudy | heavy snow | mod. snow | mod. snow | light snow | cloudy | light snow | cloudy | light rain | some clouds | some clouds | rain shwrs | some clouds | |
km/h | |||||||||||||||||||
 |  |  |  |  |  |  | |||||||||||||
14 | 6 | 3 | 1 | 2 | — | — | 11 | 7 | 7 | 3 | — | 1 | — | — | — | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | 0.1 | — | — | 0.1 | — | |
max °C | -1 | -1 | -1 | 1 | 2 | 1 | 2 | -3 | -4 | -4 | -4 | -3 | 1 | 3 | 5 | 5 | 4 | 4 | 8 |
min °C | -2 | -2 | -1 | -1 | 1 | 1 | -1 | -4 | -4 | -5 | -5 | -4 | -2 | 1 | 4 | 5 | 4 | 3 | 5 |
-11 | -11 | -9 | -7 | -6 | -6 | -10 | -12 | -10 | -14 | -11 | -9 | -6 | -2 | 2 | 1 | -1 | -1 | 2 | |
1800 | 1600 | 1900 | 2150 | 2400 | 2300 | 2350 | 1450 | 1550 | 1400 | 1350 | 1450 | 1900 | 2350 | 2800 | 2950 | 2850 | 2700 | 3250 | |
Cloud base (m) | 600 | 1700 | 600 | 600 | 2000 | 800 | 1850 | 600 | 600 | 600 | 600 | 600 | 650 | 1650 | 5350 | 2900 | 5450 | ||
 | — | 7:39 | — | — | 7:37 | — | — | 7:37 | — | — | 7:35 | — | — | 7:33 | — | — | 7:33 | — | — |
 | — | — | 5:02 | — | — | 5:04 | — | — | 5:06 | — | — | 5:07 | — | — | 5:08 | — | — | 5:10 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: A heavy fall of snow, heaviest during Thu night. Freeze-thaw conditions (max 2°C on Sat morning, min -4°C on Sun morning). Winds increasing (light winds from the WSW on Fri night, near gales from the S by Sun morning).
South Twin Sister Weather (Days 3-6):
A moderate fall of snow, heaviest on Sun night. Freeze-thaw conditions (max 5°C on Tue afternoon, min -5°C on Sun night). Winds decreasing (strong winds from the SSW on Sun night, light winds from the SW by Tue morning).
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.