– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 3 pm Sat 14 Feb Local TimeUpdates in: hr min sUpdate imminent
Issued: 3 pm Sat 14 Feb Local Time
Updates in:
Update imminent hr min s
Issued: 3 pm Sat 14 Feb Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryA moderate fall of snow, heaviest on Mon afternoon. Temperatures will be well below freezing (max -7°C on Sun morning, min -12°C on Mon afternoon). Winds increasing (calm on Sat night, fresh winds from the S by Mon afternoon). | Days 5–7 Weather SummaryA light covering of new snow mostly falling on Tue afternoon. Temperatures will be well below freezing (max -10°C on Fri morning, min -13°C on Wed morning). Wind will be generally light. | ||||||||||||||||
Sat 14 | Sunday 15 | Monday 16 | Tuesday 17 | Wednesday 18 | Thursday 19 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  | |  |  |  |  | | |  | | | | | | | | |
clear | some clouds | clear | some clouds | cloudy | light snow | heavy snow | some clouds | light snow | snow shwrs | cloudy | light snow | snow shwrs | some clouds | light snow | light snow | cloudy | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
— | — | — | — | — | 2 | 13 | — | 3 | 1 | — | 1 | 1 | — | 1 | 1 | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -9 | -8 | -7 | -7 | -8 | -10 | -11 | -10 | -11 | -11 | -11 | -12 | -12 | -13 | -13 | -12 | -12 |
min °C | -9 | -9 | -8 | -7 | -11 | -10 | -12 | -11 | -11 | -11 | -12 | -13 | -12 | -13 | -13 | -13 | -12 |
-14 | -12 | -12 | -11 | -17 | -16 | -22 | -20 | -18 | -16 | -15 | -21 | -19 | -20 | -19 | -20 | -20 | |
850 | 0 | 900 | 950 | 400 | 500 | 600 | 0 | 500 | 650 | 50 | 350 | 350 | 0 | 250 | 350 | 0 | |
Cloud base (m) | 600 | 600 | 600 | 2050 | 650 | 500 | 700 | 2200 | 550 | 2100 | 550 | 550 | 550 | 600 | 550 | 550 | |
 | — | — | 7:15 | — | — | 7:13 | — | — | 7:11 | — | — | 7:09 | — | — | 7:07 | — | — |
 | 5:27 | — | — | 5:29 | — | — | 5:30 | — | — | 5:31 | — | — | 5:34 | — | — | 5:35 | — |
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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 afternoon. Temperatures will be well below freezing (max -7°C on Sun morning, min -12°C on Mon afternoon). Winds increasing (calm on Sat night, fresh winds from the S by Mon afternoon).
South Twin Sister Weather (Days 3-6):
A light covering of new snow mostly falling on Tue afternoon. Temperatures will be well below freezing (max -10°C on Fri morning, min -13°C on Wed 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.