– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 10 am Thu 21 May Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 am Thu 21 May Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Thu 21 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 2°C on Sat night). Winds increasing (calm on Thu morning, fresh winds from the WSW by Sat night). | Days 4–6 Weather SummaryA heavy fall of snow, heaviest during Mon morning. Freeze-thaw conditions (max 3°C on Sun afternoon, min -4°C on Tue night). Winds decreasing (strong winds from the SSW on Sun night, light winds from the W by Mon night). | |||||||||||||||||
Thursday 21 | Friday 22 | Saturday 23 | Sunday 24 | Monday 25 | Tuesday 26 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  |  | | | | | | |  |  |  |  |  | |  | |
clear | clear | some clouds | some clouds | rain shwrs | some clouds | some clouds | some clouds | some clouds | some clouds | some clouds | light snow | mod. snow | light snow | mod. snow | cloudy | light snow | snow shwrs | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
— | — | — | — | — | — | — | — | — | — | — | 2 | 9 | 3 | 6 | — | 1 | 1 | |
— | — | — | — | 0.1 | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | 5 | 6 | 5 | 4 | 6 | 6 | 4 | 5 | 4 | 2 | 3 | 2 | -2 | -2 | -3 | -2 | -2 | -2 |
min °C | 5 | 5 | 4 | 4 | 5 | 5 | 4 | 5 | 2 | 1 | 3 | -1 | -2 | -3 | -3 | -3 | -2 | -4 |
5 | 3 | 3 | 3 | 5 | 2 | 2 | 2 | -4 | -4 | -2 | -9 | -10 | -10 | -8 | -7 | -7 | -10 | |
2850 | 2900 | 2750 | 2750 | 2900 | 3100 | 3050 | 2900 | 2600 | 2450 | 2650 | 2350 | 1600 | 1600 | 1550 | 1650 | 1850 | 1500 | |
Cloud base (m) | 2650 | 2550 | 2300 | 6700 | 1500 | 1650 | 2250 | 2200 | 550 | 550 | 550 | 600 | 750 | 900 | ||||
 | 5:18 | — | — | 5:18 | — | — | 5:16 | — | — | 5:16 | — | — | 5:15 | — | — | 5:13 | — | — |
 | — | — | 8:50 | — | — | 8:51 | — | — | 8:52 | — | — | 8:52 | — | — | 8:53 | — | — | 8:54 |
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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 2°C on Sat night). Winds increasing (calm on Thu morning, fresh winds from the WSW by Sat night).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Mon morning. Freeze-thaw conditions (max 3°C on Sun afternoon, min -4°C on Tue night). Winds decreasing (strong winds from the SSW on Sun night, light winds from the W 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.