– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 am Mon 13 Apr Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 am Mon 13 Apr Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Mon 13 Apr Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryA heavy fall of snow, heaviest during Tue night. Temperatures will be below freezing (max -4°C on Mon morning, min -11°C on Tue night). Winds decreasing (near gales from the SW on Tue afternoon, light winds from the W by Wed afternoon). | Days 4–6 Weather SummaryA dusting of new snow. Temperatures will be below freezing (max -1°C on Sat night, min -9°C on Thu morning). Winds increasing (calm on Fri morning, fresh winds from the S by Sat night). | |||||||||||||||||
Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  | | | |  |  |  | | |  | | | | |
light snow | cloudy | light snow | mod. snow | heavy snow | snow shwrs | mod. snow | light snow | snow shwrs | some clouds | snow shwrs | some clouds | some clouds | cloudy | cloudy | some clouds | cloudy | light snow | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
1 | — | 3 | 6 | 12 | 15 | 6 | 4 | 2 | — | 2 | — | — | — | — | — | — | 1 | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -4 | -4 | -5 | -6 | -6 | -6 | -11 | -10 | -10 | -8 | -7 | -6 | -6 | -5 | -4 | -4 | -2 | -1 |
min °C | -4 | -4 | -7 | -7 | -6 | -11 | -11 | -11 | -10 | -9 | -7 | -8 | -6 | -5 | -5 | -5 | -3 | -1 |
-9 | -10 | -15 | -15 | -16 | -20 | -17 | -17 | -17 | -16 | -13 | -14 | -10 | -7 | -9 | -11 | -9 | -8 | |
1350 | 1400 | 1100 | 1000 | 1100 | 400 | 650 | 750 | 450 | 850 | 1000 | 700 | 950 | 1100 | 850 | 1300 | 1850 | 1950 | |
Cloud base (m) | 600 | 600 | 550 | 550 | 550 | 550 | 600 | 600 | 600 | 600 | 650 | 650 | 600 | 650 | 650 | 2400 | 2250 | 1650 |
 | 6:20 | — | — | 6:18 | — | — | 6:16 | — | — | 6:15 | — | — | 6:13 | — | — | 6:11 | — | — |
 | — | 7:55 | — | — | 7:57 | — | — | 7:59 | — | — | — | 8:00 | — | — | 8:01 | — | — | 8:02 |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: A heavy fall of snow, heaviest during Tue night. Temperatures will be below freezing (max -4°C on Mon morning, min -11°C on Tue night). Winds decreasing (near gales from the SW on Tue afternoon, light winds from the W by Wed afternoon).
South Twin Sister Weather (Days 3-6):
A dusting of new snow. Temperatures will be below freezing (max -1°C on Sat night, min -9°C on Thu morning). Winds increasing (calm on Fri morning, fresh winds from the S by Sat 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.