– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 pm Tue 01 Sep Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 pm Tue 01 Sep Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Tue 01 Sep Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryDrizzle at first, then turning colder with dusting of snow on Wed night. Freeze-thaw conditions (max 8°C on Tue afternoon, min 0°C on Wed night). Winds decreasing (fresh winds from the S on Wed night, calm by Thu night). | Days 5–7 Weather SummaryMostly dry. Very mild (max 10°C on Sun afternoon, min 4°C on Fri afternoon). Wind will be generally light. | ||||||||||||||||
Tue 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  | |  |  |  |  |  |  |  | | | | | | | | |
rain shwrs | rain shwrs | rain shwrs | light rain | snow shwrs | clear | snow shwrs | clear | some clouds | risk tstorm | rain shwrs | clear | clear | clear | clear | clear | clear | |
Cloud base (m) | 850 | 1750 | 2150 | 750 | 2250 | 1650 | 2100 | 2750 | 2500 | 6500 | 2900 | 5250 | 3350 | ||||
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
 cm | — | — | — | — | 1 | — | 2 | — | — | — | — | — | — | — | — | — | — |
mm | 0.1 | 0.3 | 0.6 | 0.7 | — | — | — | — | — | 0.5 | 0.4 | — | — | — | — | — | — |
max °C | 8 | 5 | 3 | 3 | 1 | 0 | 1 | 1 | 2 | 4 | 5 | 6 | 8 | 8 | 8 | 10 | 10 |
min °C | 6 | 4 | 3 | 3 | 0 | 0 | 0 | 1 | 1 | 4 | 4 | 5 | 7 | 8 | 8 | 9 | 9 |
chill °C | 2 | -1 | -2 | -3 | -5 | -4 | -3 | -2 | 0 | 4 | 4 | 4 | 6 | 6 | 8 | 9 | 9 |
Freezing level m | 3400 | 3000 | 2550 | 2600 | 2200 | 2100 | 2250 | 2250 | 2400 | 2700 | 2750 | 2900 | 3100 | 3100 | 3250 | 3400 | 3350 |
 | — | — | 6:24 | — | — | 6:26 | — | — | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — |
 | 7:50 | — | — | 7:47 | — | — | 7:45 | — | — | 7:44 | — | — | 7:42 | — | — | 7:39 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Drizzle at first, then turning colder with dusting of snow on Wed night. Freeze-thaw conditions (max 8°C on Tue afternoon, min 0°C on Wed night). Winds decreasing (fresh winds from the S on Wed night, calm by Thu night).
South Twin Sister Weather (Days 3-6):
Mostly dry. Very mild (max 10°C on Sun afternoon, min 4°C on Fri afternoon). 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 |
|---|---|---|---|---|---|
 | |||||
Bellingham Airport |  | ||||
SHIP9799 | |||||
* 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.