– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 9 pm Mon 17 Nov Local TimeUpdates in: hr min sUpdate imminent
Issued: 9 pm Mon 17 Nov Local Time
Updates in:
Update imminent hr min s
Issued: 9 pm Mon 17 Nov Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryA dusting of new snow. Freeze-thaw conditions (max 2°C on Wed afternoon, min -6°C on Mon night). Winds increasing (calm on Mon night, fresh winds from the S by Wed night). | Days 5–7 Weather SummaryA heavy fall of snow, heaviest during Sun afternoon. Temperatures will be below freezing (max -1°C on Sat morning, min -4°C on Thu night). Winds increasing (light winds from the SW on Thu night, strong winds from the SSW by Sun afternoon). | ||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | | | | | |  | | | | | |  |  |  |  | |
light snow | cloudy | some clouds | some clouds | some clouds | cloudy | some clouds | some clouds | some clouds | cloudy | cloudy | cloudy | some clouds | cloudy | cloudy | mod. snow | mod. snow | heavy snow | heavy snow | |
km/h | |||||||||||||||||||
 |  |  |  |  |  |  | |||||||||||||
1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 9 | 6 | 17 | 41 | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max°C | -5 | -6 | -5 | 1 | 1 | 2 | 1 | -3 | -4 | -2 | -2 | -2 | -2 | -1 | -1 | -1 | -2 | -3 | -4 |
min°C | -6 | -6 | -5 | -4 | 1 | 0 | -2 | -4 | -4 | -4 | -2 | -3 | -3 | -2 | -1 | -1 | -3 | -3 | -10 |
-6 | -10 | -10 | -8 | -3 | -5 | -9 | -11 | -10 | -10 | -9 | -10 | -10 | -8 | -7 | -8 | -12 | -12 | -21 | |
1000 | 1050 | 1100 | 1300 | 2450 | 2500 | 2000 | 1450 | 1500 | 1500 | 1650 | 1800 | 1500 | 1650 | 1900 | 1900 | 1700 | 1550 | 900 | |
Cloud base (m) | 600 | 600 | 600 | 650 | 6600 | 6250 | 1600 | 650 | 600 | 600 | 600 | 1550 | 1950 | 800 | 550 | 550 | 550 | 600 | |
 | — | 7:20 | — | — | 7:22 | — | — | 7:24 | — | — | 7:24 | — | — | 7:26 | — | — | 7:28 | — | — |
 | — | — | 4:23 | — | — | 4:22 | — | — | 4:22 | — | — | 4:21 | — | — | 4:20 | — | — | 4:19 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: A dusting of new snow. Freeze-thaw conditions (max 2°C on Wed afternoon, min -6°C on Mon night). Winds increasing (calm on Mon night, fresh winds from the S by Wed night).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Sun afternoon. Temperatures will be below freezing (max -1°C on Sat morning, min -4°C on Thu night). Winds increasing (light winds from the SW on Thu night, strong winds from the SSW by Sun afternoon).
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.