– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 10 pm Sun 15 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 pm Sun 15 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 10 pm Sun 15 Mar Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryA moderate fall of snow heaviest on Sun night. Turning milder with heavy rain (total 40mm), heaviest during Tue night. Freeze-thaw conditions (max 5°C on Mon afternoon, min -2°C on Sun night). Winds decreasing (strong winds from the S on Mon night, light winds from the SW by Wed morning). | Days 5–7 Weather SummaryHeavy rain (total 73mm), heaviest during Fri morning. Later becoming colder with a dusting of snow on Fri afternoon. Freeze-thaw conditions (max 5°C on Wed night, min -6°C on Sat morning). Winds decreasing (strong winds from the S on Thu morning, calm by Sat morning). | ||||||||||||||||||
Monday 16 | Tuesday 17 | Wednesday 18 | Thursday 19 | Friday 20 | Saturday 21 | ||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | | |  |  | | | | | |  |  |  |  | |  | |
heavy snow | light snow | light rain | light snow | light rain | light rain | heavy rain | mod. rain | light rain | heavy rain | light rain | mod. rain | heavy rain | heavy rain | snow shwrs | cloudy | some clouds | some clouds | clear | |
km/h | |||||||||||||||||||
 |  |  |  |  |  |  | |||||||||||||
11 | 2 | — | 1 | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | |
— | 5 | 1.5 | 0.8 | 3 | 4 | 14 | 8 | 3 | 21 | 5 | 6 | 26 | 14 | — | — | — | — | — | |
max °C | 1 | 3 | 5 | 5 | 4 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 3 | 0 | -2 | -6 | -3 | -2 |
min °C | -2 | 2 | 4 | 2 | 3 | 5 | 4 | 5 | 5 | 4 | 4 | 4 | 4 | 2 | -1 | -5 | -6 | -4 | -3 |
-8 | -4 | -1 | -5 | -3 | 0 | 0 | 2 | 1 | -2 | -2 | -3 | -2 | -3 | -6 | -8 | -8 | -7 | -3 | |
1650 | 2700 | 2300 | 2200 | 2300 | 2400 | 2350 | 2400 | 2500 | 2450 | 2550 | 2500 | 2300 | 1800 | 1450 | 800 | 750 | 1150 | 900 | |
Cloud base (m) | 600 | 600 | 600 | 1650 | 600 | 600 | 550 | 600 | 550 | 550 | 600 | 550 | 550 | 600 | 600 | 650 | 600 | 850 | |
 | — | 7:18 | — | — | 7:16 | — | — | 7:15 | — | — | 7:13 | — | — | 7:11 | — | — | 7:09 | — | — |
 | — | — | 7:14 | — | — | 7:15 | — | — | 7:16 | — | — | 7:17 | — | — | 7:20 | — | — | 7:21 | — |
Loading...
South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: A moderate fall of snow heaviest on Sun night. Turning milder with heavy rain (total 40mm), heaviest during Tue night. Freeze-thaw conditions (max 5°C on Mon afternoon, min -2°C on Sun night). Winds decreasing (strong winds from the S on Mon night, light winds from the SW by Wed morning).
South Twin Sister Weather (Days 3-6):
Heavy rain (total 73mm), heaviest during Fri morning. Later becoming colder with a dusting of snow on Fri afternoon. Freeze-thaw conditions (max 5°C on Wed night, min -6°C on Sat morning). Winds decreasing (strong winds from the S on Thu morning, calm by Sat morning).
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.