– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 pm Sun 22 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 pm Sun 22 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Sun 22 Mar Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryA heavy fall of snow, heaviest during Tue night. Temperatures will be below freezing (max -1°C on Tue morning, min -11°C on Wed morning). Winds increasing (light winds from the SW on Mon afternoon, gales from the SSW by Tue morning). | Days 5–7 Weather SummaryA heavy fall of snow, heaviest during Wed afternoon. Freeze-thaw conditions (max 5°C on Fri night, min -12°C on Wed night). Winds decreasing (strong winds from the WSW on Wed afternoon, calm by Thu night). | ||||||||||||||||
Sun 22 | Monday 23 | Tuesday 24 | Wednesday 25 | Thursday 26 | Friday 27 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  |  |  |  |  | |  |  | |  | | |  | |
some clouds | cloudy | clear | some clouds | light snow | light snow | mod. snow | heavy snow | heavy snow | mod. snow | mod. snow | snow shwrs | snow shwrs | clear | clear | some clouds | some clouds | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
— | — | — | — | 1 | 5 | 7 | 25 | 13 | 8 | 8 | 7 | 2 | — | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -6 | -3 | -3 | -2 | -2 | -1 | -2 | -4 | -11 | -11 | -11 | -12 | -10 | -4 | -2 | 1 | 5 |
min °C | -6 | -4 | -3 | -3 | -4 | -2 | -3 | -10 | -11 | -11 | -12 | -12 | -11 | -9 | -3 | -1 | 2 |
-13 | -10 | -8 | -8 | -11 | -11 | -12 | -20 | -21 | -22 | -23 | -21 | -18 | -15 | -7 | -4 | 0 | |
1150 | 1450 | 1450 | 1700 | 1650 | 1400 | 1600 | 750 | 650 | 700 | 350 | 650 | 850 | 0 | 1800 | 2300 | 2900 | |
Cloud base (m) | 700 | 6200 | 5550 | 900 | 2500 | 650 | 550 | 550 | 600 | 600 | 750 | 650 | 750 | 650 | 600 | 650 | 600 |
 | — | — | 7:05 | — | — | 7:03 | — | — | 7:01 | — | — | 6:58 | — | — | 6:56 | — | — |
 | 7:22 | — | — | 7:23 | — | — | 7:25 | — | — | 7:27 | — | — | 7:29 | — | — | 7:30 | — |
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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 -1°C on Tue morning, min -11°C on Wed morning). Winds increasing (light winds from the SW on Mon afternoon, gales from the SSW by Tue morning).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Wed afternoon. Freeze-thaw conditions (max 5°C on Fri night, min -12°C on Wed night). Winds decreasing (strong winds from the WSW on Wed afternoon, calm by Thu 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.