– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 10 am Thu 09 Apr Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 am Thu 09 Apr Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Thu 09 Apr Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryLight rain (total 4mm), mostly falling on Sat morning. Mild temperatures (max 9°C on Thu night, min 1°C on Sat night). Wind will be generally light. | Days 4–6 Weather SummaryA heavy fall of snow, heaviest during Tue night. Freeze-thaw conditions (max 2°C on Sun afternoon, min -7°C on Tue night). Winds increasing (calm on Sun morning, strong winds from the S by Tue night). | |||||||||||||||||
Thursday 9 | Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  |  |  |  | |  | |  |  |  | |  | |  |  | |
clear | clear | clear | some clouds | cloudy | light rain | light rain | light rain | rain shwrs | some clouds | rain shwrs | some clouds | light snow | light snow | light snow | light snow | mod. snow | heavy snow | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
— | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 1 | 3 | 6 | 20 | |
— | — | — | — | — | 1.6 | 1.8 | 0.8 | 0.3 | — | 0.4 | — | — | — | — | — | — | — | |
max °C | 5 | 8 | 9 | 8 | 9 | 7 | 3 | 3 | 2 | 1 | 2 | 2 | -2 | -1 | -2 | -3 | -2 | -2 |
min °C | 5 | 8 | 9 | 8 | 8 | 4 | 3 | 3 | 1 | 1 | 2 | -2 | -3 | -2 | -3 | -3 | -3 | -7 |
4 | 8 | 9 | 7 | 8 | 4 | 1 | 1 | 1 | 1 | 0 | -6 | -7 | -5 | -8 | -10 | -11 | -15 | |
2450 | 2700 | 2800 | 2650 | 2600 | 2350 | 2050 | 2000 | 1750 | 1750 | 1900 | 1400 | 1150 | 1300 | 1100 | 1050 | 1100 | 750 | |
Cloud base (m) | 9250 | 9300 | 9100 | 1450 | 550 | 700 | 800 | 600 | 650 | 800 | 600 | 600 | 600 | 600 | 550 | 550 | ||
 | 6:28 | — | — | 6:26 | — | — | 6:24 | — | — | 6:22 | — | — | 6:20 | — | — | 6:18 | — | — |
 | — | 7:50 | — | — | 7:51 | — | — | 7:52 | — | — | 7:53 | — | — | 7:55 | — | — | 7:57 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Light rain (total 4mm), mostly falling on Sat morning. Mild temperatures (max 9°C on Thu night, min 1°C on Sat night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Tue night. Freeze-thaw conditions (max 2°C on Sun afternoon, min -7°C on Tue night). Winds increasing (calm on Sun morning, strong winds from the S by Tue night).
This table gives the weather forecast for South Twin Sister at the specific elevation of 1500 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.