– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 pm Thu 19 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 pm Thu 19 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Thu 19 Mar Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryHeavy rain (total 48mm), heaviest during Fri morning. Later becoming colder with a dusting of snow on Fri night. Freeze-thaw conditions (max 5°C on Thu night, min -6°C on Sat morning). Winds decreasing (fresh winds from the SSW on Thu night, calm by Sat night). | Days 5–7 Weather SummaryA heavy fall of snow, heaviest during Tue night. Freeze-thaw conditions (max 2°C on Mon night, min -6°C on Tue night). Winds increasing (calm on Mon afternoon, near gales from the SSW by Tue afternoon). | ||||||||||||||||
Thu 19 | Friday 20 | Saturday 21 | Sunday 22 | Monday 23 | Tuesday 24 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  |  | |  | | |  |  | | |  |  |  | |
mod. rain | heavy rain | heavy rain | mod. rain | snow shwrs | some clouds | some clouds | clear | some clouds | some clouds | cloudy | cloudy | some clouds | snow shwrs | mod. snow | light snow | heavy snow | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
— | — | — | — | 2 | — | — | — | — | — | — | — | — | 1 | 10 | 5 | 19 | |
8 | 11 | 22 | 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | 3 | 5 | 5 | 4 | 0 | -5 | -5 | -4 | -3 | -3 | -3 | -3 | -1 | 2 | 0 | 1 | -1 |
min °C | 3 | 4 | 4 | 2 | -4 | -6 | -5 | -5 | -4 | -3 | -3 | -3 | -3 | -2 | -1 | 0 | -6 |
-2 | 1 | -1 | -2 | -9 | -10 | -10 | -10 | -9 | -7 | -6 | -3 | -3 | -9 | -8 | -8 | -14 | |
2300 | 2450 | 2200 | 1850 | 1100 | 800 | 950 | 550 | 1000 | 1100 | 900 | 1100 | 1350 | 1700 | 1350 | 1800 | 650 | |
Cloud base (m) | 600 | 600 | 600 | 600 | 600 | 750 | 800 | 700 | 1750 | 950 | 600 | 600 | 2300 | 2500 | 550 | 550 | 600 |
 | — | — | 7:11 | — | — | 7:09 | — | — | 7:07 | — | — | 7:05 | — | — | 7:03 | — | — |
 | 7:17 | — | — | 7:20 | — | — | 7:21 | — | — | 7:22 | — | — | 7:23 | — | — | 7:25 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Heavy rain (total 48mm), heaviest during Fri morning. Later becoming colder with a dusting of snow on Fri night. Freeze-thaw conditions (max 5°C on Thu night, min -6°C on Sat morning). Winds decreasing (fresh winds from the SSW on Thu night, calm by Sat night).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Tue night. Freeze-thaw conditions (max 2°C on Mon night, min -6°C on Tue night). Winds increasing (calm on Mon afternoon, near gales from the SSW by Tue afternoon).
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.