– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 3 pm Sat 07 Nov Local Time
Updates in:
Update imminent hr min s
Issued: 3 pm Sat 07 Nov 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 Sat night. Freeze-thaw conditions (max 5°C on Sat afternoon, min -5°C on Sun morning). Winds decreasing (severe gales from the SSW on Sat night, light winds from the WSW by Sun night). | Days 5–7 Weather SummaryLight rain (total 9mm), mostly falling on Tue night. Very mild (max 10°C on Wed night, min 1°C on Thu night). Winds increasing (moderate winds from the SSW on Tue afternoon, near gales from the SSW by Thu night). | ||||||||||||||||
Sat 7 | Sunday 8 | Monday 9 | Tuesday 10 | Wednesday 11 | Thursday 12 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  |  |  |  | | |  |  | | |  | |  | |
light rain | heavy snow | snow shwrs | snow shwrs | some clouds | cloudy | light snow | light snow | light snow | light rain | rain shwrs | some clouds | some clouds | some clouds | clear | some clouds | cloudy | |
Cloud base (m) | 2300 | 550 | 600 | 800 | 750 | 1850 | 900 | 600 | 800 | 600 | 900 | 4750 | 6950 | 6700 | 8600 | 5450 | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
 cm | — | 17 | 8 | 1 | — | — | 3 | 2 | 4 | — | — | — | — | — | — | — | — |
mm | 0.1 | — | — | — | — | — | — | — | — | 3 | 6 | — | — | — | — | — | — |
max °C | 5 | 2 | -4 | -4 | -1 | -2 | -2 | 0 | 1 | 3 | 6 | 6 | 8 | 10 | 9 | 6 | 4 |
min °C | 3 | -4 | -5 | -4 | -2 | -3 | -2 | -2 | -1 | 2 | 3 | 6 | 7 | 9 | 8 | 5 | 1 |
chill °C | -6 | -12 | -13 | -10 | -5 | -10 | -9 | -9 | -7 | -4 | -3 | 1 | 2 | 5 | 4 | -1 | -7 |
Freezing level m | 2800 | 1700 | 1450 | 1500 | 1550 | 1700 | 1700 | 1850 | 1750 | 2700 | 3200 | 3250 | 3300 | 3450 | 3450 | 3100 | 2650 |
 | — | — | 7:05 | — | — | 7:07 | — | — | 7:07 | — | — | 7:09 | — | — | 7:11 | — | — |
 | 4:37 | — | — | 4:36 | — | — | 4:35 | — | — | 4:34 | — | — | 4:31 | — | — | 4:30 | — |
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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 Sat night. Freeze-thaw conditions (max 5°C on Sat afternoon, min -5°C on Sun morning). Winds decreasing (severe gales from the SSW on Sat night, light winds from the WSW by Sun night).
South Twin Sister Weather (Days 3-6):
Light rain (total 9mm), mostly falling on Tue night. Very mild (max 10°C on Wed night, min 1°C on Thu night). Winds increasing (moderate winds from the SSW on Tue afternoon, near gales from the SSW by Thu 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.
| Weather Station | Temp. | Weather | Wind | Gusts | Cloud / Visibility |
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SHIP4847 | |||||
SHIP4371 |
* 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.