– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 3 am Fri 26 Dec Local TimeUpdates in: hr min sUpdate imminent
Issued: 3 am Fri 26 Dec Local Time
Updates in:
Update imminent hr min s
Issued: 3 am Fri 26 Dec 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 Fri afternoon. Temperatures will be below freezing (max -2°C on Sun night, min -12°C on Fri night). Winds decreasing (strong winds from the SSW on Fri morning, light winds from the NW by Sat morning). | Days 4–6 Weather SummaryMostly dry. Freeze-thaw conditions (max 3°C on Tue afternoon, min -2°C on Mon morning). Wind will be generally light. | |||||||||||||||||
Friday 26 | Saturday 27 | Sunday 28 | Monday 29 | Tuesday 30 | Wednesday 31 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  |  |  | | |  | | | |  | | |  | | | |
heavy snow | heavy snow | snow shwrs | some clouds | cloudy | cloudy | some clouds | some clouds | some clouds | cloudy | some clouds | some clouds | clear | clear | some clouds | rain shwrs | cloudy | cloudy | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
20 | 27 | 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 0.1 | — | — | |
max °C | -7 | -10 | -11 | -9 | -9 | -6 | -5 | -5 | -2 | -1 | -2 | 0 | 1 | 3 | 3 | 3 | 3 | 2 |
min °C | -9 | -11 | -12 | -10 | -9 | -9 | -6 | -5 | -4 | -2 | -2 | -1 | 1 | 2 | 2 | 3 | 2 | 0 |
-19 | -22 | -21 | -16 | -16 | -17 | -14 | -12 | -10 | -8 | -8 | -6 | -4 | -3 | -3 | -2 | -3 | -6 | |
950 | 600 | 150 | 0 | 350 | 0 | 550 | 700 | 0 | 1550 | 1600 | 1600 | 2450 | 2500 | 2600 | 2700 | 2600 | 2400 | |
Cloud base (m) | 600 | 550 | 550 | 600 | 600 | 950 | 650 | 650 | 750 | 900 | 800 | 850 | 1000 | 650 | 2100 | 950 | 600 | 4900 |
 | 8:00 | — | — | 8:00 | — | — | 8:00 | — | — | 8:00 | — | — | 8:00 | — | — | 8:00 | — | — |
 | — | 4:16 | — | — | 4:17 | — | — | 4:17 | — | — | 4:19 | — | — | 4:20 | — | — | 4:21 | — |
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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 Fri afternoon. Temperatures will be below freezing (max -2°C on Sun night, min -12°C on Fri night). Winds decreasing (strong winds from the SSW on Fri morning, light winds from the NW by Sat morning).
South Twin Sister Weather (Days 3-6):
Mostly dry. Freeze-thaw conditions (max 3°C on Tue afternoon, min -2°C on Mon 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.
| Weather Station | Temp. | Weather | Wind | Gusts | Cloud / Visibility |
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SHIP4337 |
* NOTE: not all weather observatories update at the same frequency which is the reason why some locations may show data from stations that are further away than known closer ones.