– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 10 pm Fri 15 May Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 pm Fri 15 May Local Time
Updates in:
Update imminent hr min s
Issued: 10 pm Fri 15 May Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryA heavy fall of snow, heaviest during Fri night. Freeze-thaw conditions (max 4°C on Mon afternoon, min -3°C on Fri night). Wind will be generally light. | Days 5–7 Weather SummaryLight rain (total 4mm), mostly falling on Tue afternoon. Mild temperatures (max 6°C on Wed afternoon, min 2°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Saturday 16 | Sunday 17 | Monday 18 | Tuesday 19 | Wednesday 20 | Thursday 21 | ||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  |  |  | | |  | | | | |  | | | | |
heavy snow | light snow | snow shwrs | some clouds | some clouds | rain shwrs | rain shwrs | cloudy | rain shwrs | rain shwrs | light rain | rain shwrs | rain shwrs | rain shwrs | rain shwrs | light rain | rain shwrs | light rain | rain shwrs | |
km/h | |||||||||||||||||||
 |  |  |  |  |  |  | |||||||||||||
16 | 5 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
— | — | — | — | — | 0.2 | 0.1 | — | 0.1 | 0.1 | 0.8 | 1.3 | 0.7 | 0.1 | 0.1 | 0.2 | 0.1 | 0.2 | 0.1 | |
max °C | -2 | -2 | -1 | -1 | 0 | 3 | 3 | 3 | 4 | 3 | 2 | 3 | 4 | 3 | 6 | 6 | 4 | 5 | 5 |
min °C | -3 | -3 | -2 | -2 | -1 | 2 | 3 | 2 | 3 | 2 | 2 | 2 | 3 | 3 | 6 | 4 | 4 | 4 | 3 |
-7 | -8 | -6 | -2 | -4 | 2 | 3 | 0 | 1 | 1 | 0 | 1 | 2 | 3 | 5 | 2 | 3 | 3 | 2 | |
1150 | 1150 | 1300 | 1150 | 1500 | 2100 | 2050 | 1800 | 2100 | 2000 | 1900 | 2050 | 2200 | 2750 | 2850 | 2750 | 2650 | 2550 | 2250 | |
Cloud base (m) | 600 | 600 | 600 | 800 | 750 | 900 | 600 | 1600 | 1550 | 1900 | 650 | 600 | 2000 | 900 | 2000 | 850 | 800 | 750 | |
 | — | 5:24 | — | — | 5:24 | — | — | 5:22 | — | — | 5:22 | — | — | 5:20 | — | — | 5:18 | — | — |
 | — | — | — | 8:43 | — | — | 8:44 | — | — | 8:45 | — | — | 8:46 | — | — | 8:47 | — | — | 8:50 |
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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 night. Freeze-thaw conditions (max 4°C on Mon afternoon, min -3°C on Fri night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Light rain (total 4mm), mostly falling on Tue afternoon. Mild temperatures (max 6°C on Wed afternoon, min 2°C on Mon night). 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.
| Weather Station | Temp. | Weather | Wind | Gusts | Cloud / Visibility |
|---|---|---|---|---|---|
 | |||||
Bellingham Airport | |
* 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.