– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 pm Sat 14 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 pm Sat 14 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Sat 14 Mar Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryA light fall of snow, heaviest on Sun night. Turning milder with light rain (total 10mm) on Mon afternoon. Freeze-thaw conditions (max 5°C on Mon afternoon, min -8°C on Sat afternoon). Winds increasing (calm on Sat night, strong winds from the S by Mon night). | Days 5–7 Weather SummaryHeavy rain (total 97mm), heaviest during Thu night. Mild temperatures (max 5°C on Tue afternoon, min 2°C on Wed morning). Mainly strong winds. | ||||||||||||||||
Sat 14 | Sunday 15 | Monday 16 | Tuesday 17 | Wednesday 18 | Thursday 19 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  |  |  |  |  | |  | | |  | | | | |
snow shwrs | some clouds | cloudy | cloudy | mod. snow | light snow | mod. rain | light snow | light rain | mod. rain | heavy rain | mod. rain | mod. rain | mod. rain | mod. rain | mod. rain | heavy rain | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
1 | — | — | — | 9 | 4 | — | 2 | — | — | — | — | — | — | — | — | — | |
— | — | — | — | — | — | 5 | 0.4 | 4 | 5 | 20 | 9 | 8 | 9 | 7 | 8 | 20 | |
max °C | -8 | -6 | -4 | -4 | 0 | 2 | 5 | 3 | 4 | 5 | 5 | 3 | 3 | 5 | 5 | 5 | 5 |
min °C | -8 | -7 | -6 | -5 | -3 | 1 | 2 | 2 | 3 | 4 | 4 | 2 | 3 | 3 | 4 | 5 | 3 |
-14 | -7 | -6 | -10 | -9 | -6 | -5 | -4 | -2 | -1 | -1 | -4 | -3 | -3 | -1 | 0 | -2 | |
550 | 0 | 850 | 800 | 1500 | 2500 | 2200 | 2350 | 2350 | 2400 | 2450 | 2350 | 2300 | 2500 | 2600 | 2700 | 2650 | |
Cloud base (m) | 650 | 800 | 2250 | 1950 | 600 | 600 | 600 | 1550 | 600 | 550 | 550 | 600 | 600 | 600 | 600 | 600 | 550 |
 | — | — | 7:20 | — | — | 7:18 | — | — | 7:16 | — | — | 7:15 | — | — | 7:13 | — | — |
 | 7:10 | — | — | 7:12 | — | — | 7:14 | — | — | 7:15 | — | — | 7:16 | — | — | 7:17 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: A light fall of snow, heaviest on Sun night. Turning milder with light rain (total 10mm) on Mon afternoon. Freeze-thaw conditions (max 5°C on Mon afternoon, min -8°C on Sat afternoon). Winds increasing (calm on Sat night, strong winds from the S by Mon night).
South Twin Sister Weather (Days 3-6):
Heavy rain (total 97mm), heaviest during Thu night. Mild temperatures (max 5°C on Tue afternoon, min 2°C on Wed morning). Mainly strong winds.
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.