– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 9 am Sun 25 Jan Local TimeUpdates in: hr min sUpdate imminent
Issued: 9 am Sun 25 Jan Local Time
Updates in:
Update imminent hr min s
Issued: 9 am Sun 25 Jan Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryA dusting of new snow. Freeze-thaw conditions (max 1°C on Tue morning, min -5°C on Tue afternoon). Winds increasing (light winds from the W on Sun afternoon, near gales from the S by Tue afternoon). | Days 4–6 Weather SummaryA heavy fall of snow, heaviest during Thu night. Temperatures will be below freezing (max 0°C on Thu night, min -3°C on Wed morning). Winds decreasing (near gales from the S on Wed afternoon, light winds from the SW by Fri afternoon). | |||||||||||||||||
Sunday 25 | Monday 26 | Tuesday 27 | Wednesday 28 | Thursday 29 | Friday 30 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  | |  | |  |  | | |  | | |  |  | | | |
clear | clear | some clouds | cloudy | cloudy | cloudy | cloudy | light snow | snow shwrs | light snow | light snow | heavy snow | light snow | cloudy | mod. snow | mod. snow | cloudy | mod. snow | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
— | — | — | — | — | — | — | 1 | 3 | 2 | 4 | 15 | 3 | — | 10 | 6 | — | 8 | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -3 | -2 | -2 | -4 | -4 | -1 | 1 | 1 | -3 | -3 | -3 | -3 | -2 | -1 | 0 | -2 | -1 | -1 |
min °C | -3 | -2 | -3 | -4 | -4 | -4 | 1 | -5 | -5 | -3 | -3 | -3 | -3 | -2 | -2 | -2 | -1 | -2 |
-7 | -6 | -8 | -10 | -10 | -9 | -5 | -15 | -15 | -12 | -13 | -12 | -10 | -8 | -11 | -10 | -5 | -8 | |
1500 | 1700 | 1550 | 1450 | 1400 | 1650 | 2250 | 2200 | 1450 | 1550 | 1650 | 1600 | 1500 | 1850 | 2050 | 1650 | 1900 | 1800 | |
Cloud base (m) | 6850 | 3800 | 2900 | 2050 | 4650 | 5250 | 800 | 600 | 600 | 600 | 600 | 600 | 600 | 600 | 600 | 600 | ||
 | 7:46 | — | — | 7:43 | — | — | 7:43 | — | — | 7:41 | — | — | 7:41 | — | — | 7:39 | — | — |
 | — | 4:54 | — | — | 4:55 | — | — | 4:58 | — | — | 4:59 | — | — | 5:00 | — | — | 5:02 | — |
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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 1°C on Tue morning, min -5°C on Tue afternoon). Winds increasing (light winds from the W on Sun afternoon, near gales from the S by Tue afternoon).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Thu night. Temperatures will be below freezing (max 0°C on Thu night, min -3°C on Wed morning). Winds decreasing (near gales from the S on Wed afternoon, light winds from the SW by Fri 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.