– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 am Tue 31 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 am Tue 31 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Tue 31 Mar 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 Wed night. Temperatures will be below freezing (max -4°C on Tue afternoon, min -8°C on Wed night). Winds increasing (light winds from the SSW on Tue morning, fresh winds from the S by Wed afternoon). | Days 4–6 Weather SummaryMostly dry. Freeze-thaw conditions (max 2°C on Sun night, min -5°C on Fri morning). Wind will be generally light. | |||||||||||||||||
Tuesday 31 | Wednesday 1 | Thursday 2 | Friday 3 | Saturday 4 | Sunday 5 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | |  | | |  | | | | | | | | |  | |
cloudy | some clouds | light snow | light snow | light snow | heavy snow | light snow | light snow | some clouds | some clouds | some clouds | some clouds | some clouds | cloudy | some clouds | some clouds | some clouds | clear | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
— | — | 2 | 4 | 2 | 11 | 2 | 1 | — | — | — | — | — | — | — | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -5 | -4 | -4 | -5 | -4 | -6 | -6 | -5 | -5 | -5 | -3 | -2 | -1 | -1 | 0 | -1 | 0 | 2 |
min °C | -5 | -4 | -7 | -7 | -4 | -8 | -7 | -5 | -5 | -5 | -4 | -3 | -2 | -1 | 0 | -1 | 0 | 1 |
-10 | -10 | -16 | -16 | -11 | -14 | -13 | -11 | -11 | -10 | -9 | -8 | -6 | -5 | -5 | -6 | -4 | -2 | |
1400 | 1600 | 1350 | 1250 | 1400 | 900 | 950 | 1100 | 1150 | 1250 | 1500 | 1700 | 1750 | 2000 | 2100 | 1950 | 2200 | 2400 | |
Cloud base (m) | 3550 | 2300 | 550 | 750 | 550 | 600 | 600 | 600 | 1850 | 900 | 1550 | 1550 | 2600 | 2400 | 1950 | 1850 | 8600 | |
 | 6:48 | — | — | 6:46 | — | — | 6:43 | — | — | 6:41 | — | — | 6:39 | — | — | 6:37 | — | — |
 | — | 7:36 | — | — | 7:37 | — | — | 7:38 | — | — | 7:40 | — | — | 7:42 | — | — | 7:44 | — |
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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 Wed night. Temperatures will be below freezing (max -4°C on Tue afternoon, min -8°C on Wed night). Winds increasing (light winds from the SSW on Tue morning, fresh winds from the S by Wed afternoon).
South Twin Sister Weather (Days 3-6):
Mostly dry. Freeze-thaw conditions (max 2°C on Sun night, min -5°C on Fri morning). Wind will be generally light.
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.