– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 10 am Wed 20 May Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 am Wed 20 May Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Wed 20 May Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryMostly dry. Mild temperatures (max 6°C on Thu afternoon, min 1°C on Wed morning). Wind will be generally light. | Days 4–6 Weather SummaryA heavy fall of snow, heaviest during Sun night. Freeze-thaw conditions (max 6°C on Sat afternoon, min -3°C on Sun night). Winds decreasing (fresh winds from the WSW on Sat night, light winds from the NW by Mon afternoon). | |||||||||||||||||
Wednesday 20 | Thursday 21 | Friday 22 | Saturday 23 | Sunday 24 | Monday 25 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | | | | |  |  | | | | |  |  | | |  | |
clear | some clouds | clear | clear | some clouds | clear | clear | rain shwrs | some clouds | some clouds | clear | some clouds | some clouds | light snow | heavy snow | light snow | light snow | snow shwrs | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
— | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 16 | 5 | 2 | 1 | |
— | — | — | — | — | — | — | 0.1 | — | — | — | — | — | — | — | — | — | — | |
max °C | 2 | 4 | 5 | 5 | 6 | 6 | 4 | 6 | 6 | 4 | 6 | 5 | 1 | 0 | -1 | -3 | -2 | -1 |
min °C | 1 | 3 | 4 | 5 | 6 | 5 | 4 | 6 | 5 | 4 | 5 | 2 | 0 | 0 | -3 | -3 | -2 | -1 |
1 | 1 | 0 | 5 | 4 | 2 | 2 | 4 | 2 | 1 | 1 | -4 | -5 | -6 | -10 | -8 | -6 | -5 | |
2600 | 2900 | 2950 | 2850 | 2950 | 2850 | 2900 | 3050 | 3200 | 3100 | 2950 | 2600 | 2200 | 2050 | 1600 | 1550 | 1800 | 1950 | |
Cloud base (m) | 900 | 1700 | 6100 | 5000 | 2650 | 8650 | 2250 | 6800 | 1950 | 1850 | 550 | 550 | 650 | 1750 | ||||
 | 5:20 | — | — | 5:18 | — | — | 5:18 | — | — | 5:16 | — | — | 5:16 | — | — | 5:15 | — | — |
 | — | — | 8:47 | — | — | 8:50 | — | — | 8:51 | — | — | 8:52 | — | — | 8:52 | — | — | 8:53 |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Mostly dry. Mild temperatures (max 6°C on Thu afternoon, min 1°C on Wed morning). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Sun night. Freeze-thaw conditions (max 6°C on Sat afternoon, min -3°C on Sun night). Winds decreasing (fresh winds from the WSW on Sat night, light winds from the NW by Mon afternoon).
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.