– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 9 pm Sun 28 Dec Local TimeUpdates in: hr min sUpdate imminent
Issued: 9 pm Sun 28 Dec Local Time
Updates in:
Update imminent hr min s
Issued: 9 pm Sun 28 Dec Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryMostly dry. Freeze-thaw conditions (max 5°C on Tue afternoon, min -3°C on Sun night). Wind will be generally light. | Days 5–7 Weather SummaryA moderate fall of snow, heaviest on Fri night. Freeze-thaw conditions (max 4°C on Wed night, min -7°C on Sat afternoon). Winds increasing (light winds from the SW on Wed night, near gales from the S by Fri night). | ||||||||||||||||||
Monday 29 | Tuesday 30 | Wednesday 31 | Thursday 1 | Friday 2 | Saturday 3 | ||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | | | | | | | | | |  |  | |  | | |  | |
some clouds | some clouds | cloudy | some clouds | some clouds | some clouds | some clouds | some clouds | some clouds | some clouds | cloudy | cloudy | cloudy | light snow | cloudy | mod. snow | light snow | light snow | light snow | |
km/h | |||||||||||||||||||
 |  |  |  |  |  |  | |||||||||||||
— | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | 8 | 3 | 1 | 4 | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -1 | 0 | 1 | 4 | 4 | 5 | 4 | 4 | 4 | 4 | 1 | -1 | -2 | -1 | 1 | 1 | -5 | -7 | -8 |
min °C | -3 | -1 | 0 | 2 | 4 | 4 | 3 | 4 | 4 | 2 | 0 | -3 | -3 | -2 | 0 | -4 | -6 | -7 | -8 |
-8 | -7 | -5 | -2 | 0 | 0 | -1 | 1 | 2 | -2 | -5 | -8 | -9 | -9 | -5 | -14 | -16 | -17 | -18 | |
1300 | 1950 | 2250 | 3000 | 3050 | 3150 | 2900 | 2950 | 2950 | 2900 | 2350 | 1900 | 1450 | 1800 | 2050 | 1500 | 1300 | 1150 | 950 | |
Cloud base (m) | 900 | 1000 | 2550 | 8800 | 5100 | 600 | 6650 | 6000 | 5300 | 4550 | 2850 | 650 | 550 | 1650 | 1600 | 550 | 600 | 550 | |
 | — | 8:00 | — | — | 8:00 | — | — | 8:00 | — | — | 8:00 | — | — | 8:00 | — | — | 8:00 | — | — |
 | — | — | 4:19 | — | — | 4:20 | — | — | 4:21 | — | — | 4:22 | — | — | 4:22 | — | — | 4:23 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Mostly dry. Freeze-thaw conditions (max 5°C on Tue afternoon, min -3°C on Sun night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
A moderate fall of snow, heaviest on Fri night. Freeze-thaw conditions (max 4°C on Wed night, min -7°C on Sat afternoon). Winds increasing (light winds from the SW on Wed night, near gales from the S by Fri night).
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.