– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 3 pm Fri 30 Jan Local TimeUpdates in: hr min sUpdate imminent
Issued: 3 pm Fri 30 Jan Local Time
Updates in:
Update imminent hr min s
Issued: 3 pm Fri 30 Jan Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryMild at first with light rain (total 10mm) on Fri afternoon followed by colder weather and light fall of snow, heaviest on Sun morning. Freeze-thaw conditions (max 6°C on Sat afternoon, min -1°C on Sun night). Winds increasing (light winds from the WSW on Fri afternoon, fresh winds from the S by Sat night). | Days 5–7 Weather SummaryA dusting of new snow. Freeze-thaw conditions (max 11°C on Wed morning, min 0°C on Mon afternoon). Wind will be generally light. | ||||||||||||||||
Fri 30 | Saturday 31 | Sunday 1 | Monday 2 | Tuesday 3 | Wednesday 4 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  |  |  |  | | |  |  |  | |  | | | |
mod. rain | rain shwrs | light rain | light rain | light snow | mod. snow | light snow | cloudy | light snow | light snow | some clouds | some clouds | cloudy | some clouds | clear | clear | some clouds | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
— | — | — | — | 1 | 10 | 4 | — | 1 | 2 | — | — | — | — | — | — | — | |
6 | 1.1 | 1.8 | 0.7 | 0.2 | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | 3 | 4 | 5 | 6 | 6 | 0 | 0 | 0 | 0 | 2 | 3 | 7 | 7 | 9 | 11 | 10 | 9 |
min °C | 3 | 3 | 5 | 5 | 1 | 0 | 0 | -1 | -1 | 0 | 2 | 4 | 7 | 7 | 10 | 8 | 8 |
-3 | 0 | 2 | 0 | -6 | -7 | -6 | -7 | -6 | -6 | -2 | 2 | 4 | 4 | 8 | 6 | 6 | |
1950 | 2150 | 2400 | 2300 | 2100 | 1500 | 1550 | 1400 | 1500 | 1550 | 2050 | 2350 | 2500 | 2950 | 3300 | 3100 | 2950 | |
Cloud base (m) | 600 | 800 | 1900 | 600 | 2650 | 700 | 600 | 800 | 950 | 650 | 750 | 800 | 2650 | 3100 | 8550 | 5400 | |
 | — | — | 7:37 | — | — | 7:37 | — | — | 7:35 | — | — | 7:33 | — | — | 7:33 | — | — |
 | 5:02 | — | — | 5:04 | — | — | 5:06 | — | — | 5:07 | — | — | 5:08 | — | — | 5:10 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Mild at first with light rain (total 10mm) on Fri afternoon followed by colder weather and light fall of snow, heaviest on Sun morning. Freeze-thaw conditions (max 6°C on Sat afternoon, min -1°C on Sun night). Winds increasing (light winds from the WSW on Fri afternoon, fresh winds from the S by Sat night).
South Twin Sister Weather (Days 3-6):
A dusting of new snow. Freeze-thaw conditions (max 11°C on Wed morning, min 0°C on Mon afternoon). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 1500 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.