– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 am Fri 17 Apr Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 am Fri 17 Apr Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Fri 17 Apr Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryMostly dry. Freeze-thaw conditions (max 6°C on Sun afternoon, min -6°C on Fri morning). Wind will be generally light. | Days 4–6 Weather SummaryA dusting of new snow. Freeze-thaw conditions (max 8°C on Mon afternoon, min -2°C on Wed night). Winds increasing (calm on Mon morning, fresh winds from the NNE by Wed night). | |||||||||||||||||
Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  | | | | |  | | | |  | | | |  | |  | |
some clouds | some clouds | some clouds | some clouds | some clouds | some clouds | some clouds | cloudy | some clouds | some clouds | some clouds | rain shwrs | some clouds | cloudy | some clouds | clear | clear | snow shwrs | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | |
— | — | — | — | — | — | — | — | — | — | — | 0.1 | — | — | — | — | — | — | |
max °C | -5 | -2 | 0 | 0 | 3 | 4 | 5 | 6 | 6 | 7 | 8 | 8 | 7 | 8 | 8 | 2 | 1 | -1 |
min °C | -6 | -3 | -1 | 0 | 2 | 3 | 4 | 6 | 6 | 7 | 8 | 6 | 6 | 8 | 4 | 1 | 0 | -2 |
-9 | -3 | -3 | -4 | -2 | 0 | 1 | 5 | 5 | 7 | 7 | 4 | 4 | 6 | 0 | -2 | -3 | -8 | |
1150 | 1600 | 2000 | 2200 | 2500 | 2700 | 2800 | 2850 | 2900 | 3100 | 3150 | 3050 | 3150 | 3200 | 2900 | 2450 | 2100 | 1900 | |
Cloud base (m) | 650 | 950 | 5250 | 4450 | 3250 | 3350 | 2750 | 3350 | 3850 | 6100 | 6200 | 4650 | 6150 | 5700 | 6000 | 1700 | 800 | 2500 |
 | 6:13 | — | — | 6:11 | — | — | 6:09 | — | — | 6:07 | — | — | 6:05 | — | — | 6:03 | — | — |
 | — | — | 8:01 | — | — | 8:02 | — | — | 8:04 | — | — | 8:06 | — | — | 8:07 | — | — | 8:08 |
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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 6°C on Sun afternoon, min -6°C on Fri morning). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
A dusting of new snow. Freeze-thaw conditions (max 8°C on Mon afternoon, min -2°C on Wed night). Winds increasing (calm on Mon morning, fresh winds from the NNE by Wed 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.