– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 3 am Sun 11 Jan Local TimeUpdates in: hr min sUpdate imminent
Issued: 3 am Sun 11 Jan Local Time
Updates in:
Update imminent hr min s
Issued: 3 am Sun 11 Jan Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryA moderate fall of snow heaviest on Mon morning. Turning milder with heavy rain (total 22mm), heaviest during Mon afternoon. Freeze-thaw conditions (max 7°C on Tue afternoon, min -2°C on Sun morning). Winds decreasing (near gales from the SW on Sun night, light winds from the WSW by Tue afternoon). | Days 4–6 Weather SummaryMostly dry. Very mild (max 10°C on Fri afternoon, min 1°C on Wed morning). Winds decreasing (fresh winds from the SW on Wed morning, calm by Thu night). | |||||||||||||||||
Sunday 11 | Monday 12 | Tuesday 13 | Wednesday 14 | Thursday 15 | Friday 16 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  |  |  |  |  |  | | | | | | | | | | |
light snow | light snow | mod. snow | mod. snow | heavy rain | rain shwrs | some clouds | clear | clear | some clouds | clear | clear | clear | clear | clear | clear | clear | clear | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
3 | 3 | 6 | 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
— | — | — | — | 13 | 9 | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -1 | 0 | 1 | 2 | 3 | 3 | 4 | 7 | 7 | 3 | 2 | 3 | 6 | 7 | 9 | 9 | 10 | 9 |
min °C | -2 | -1 | 1 | 1 | 3 | 3 | 3 | 5 | 4 | 1 | 1 | 1 | 4 | 6 | 8 | 9 | 10 | 9 |
-10 | -9 | -7 | -7 | -4 | -3 | -1 | 2 | -1 | -4 | -4 | -4 | 2 | 5 | 8 | 8 | 9 | 8 | |
1450 | 2050 | 2350 | 2400 | 2650 | 2650 | 2700 | 3150 | 3400 | 2700 | 2850 | 3000 | 3350 | 3350 | 3400 | 3700 | 3800 | 3800 | |
Cloud base (m) | 600 | 650 | 600 | 600 | 600 | 600 | 750 | 1000 | 9550 | 850 | 650 | 8750 | 9350 | |||||
 | 7:56 | — | — | 7:56 | — | — | 7:56 | — | — | 7:56 | — | — | 7:54 | — | — | 7:54 | — | — |
 | — | 4:34 | — | — | 4:35 | — | — | 4:37 | — | — | 4:37 | — | — | 4:39 | — | — | 4:40 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: A moderate fall of snow heaviest on Mon morning. Turning milder with heavy rain (total 22mm), heaviest during Mon afternoon. Freeze-thaw conditions (max 7°C on Tue afternoon, min -2°C on Sun morning). Winds decreasing (near gales from the SW on Sun night, light winds from the WSW by Tue afternoon).
South Twin Sister Weather (Days 3-6):
Mostly dry. Very mild (max 10°C on Fri afternoon, min 1°C on Wed morning). Winds decreasing (fresh winds from the SW on Wed morning, 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.