– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 3 pm Mon 22 Dec Local TimeUpdates in: hr min sUpdate imminent
Issued: 3 pm Mon 22 Dec Local Time
Updates in:
Update imminent hr min s
Issued: 3 pm Mon 22 Dec 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 Mon night. Temperatures will be below freezing (max -1°C on Tue night, min -11°C on Mon night). Mainly severe gales. | Days 5–7 Weather SummaryA moderate fall of snow, heaviest on Thu night. Freeze-thaw conditions (max 2°C on Sun morning, min -8°C on Fri morning). Mainly fresh winds. | ||||||||||||||||
Mon 22 | Tuesday 23 | Wednesday 24 | Thursday 25 | Friday 26 | Saturday 27 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  | |  | | |  | | | | | | | |
mod. snow | snow shwrs | some clouds | cloudy | light snow | light snow | light snow | some clouds | cloudy | cloudy | heavy snow | light snow | some clouds | snow shwrs | some clouds | some clouds | some clouds | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
10 | 30 | — | — | 1 | 5 | 1 | — | — | — | 16 | 1 | — | 1 | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -7 | -9 | -9 | -6 | -1 | -1 | -5 | -2 | -1 | -1 | -4 | -7 | -8 | -8 | -7 | -5 | -1 |
min °C | -8 | -11 | -10 | -8 | -5 | -4 | -5 | -4 | -2 | -3 | -6 | -8 | -8 | -8 | -8 | -7 | -5 |
-19 | -20 | -17 | -15 | -12 | -15 | -14 | -8 | -7 | -9 | -14 | -17 | -16 | -16 | -15 | -14 | -11 | |
900 | 650 | 550 | 750 | 1550 | 1850 | 1250 | 1500 | 1800 | 1900 | 1100 | 850 | 700 | 0 | 550 | 600 | 0 | |
Cloud base (m) | 500 | 550 | 550 | 600 | 2400 | 1500 | 600 | 550 | 650 | 750 | 550 | 550 | 600 | 600 | 600 | 600 | 900 |
 | — | — | 7:58 | — | — | 7:58 | — | — | 7:58 | — | — | 8:00 | — | — | 8:00 | — | — |
 | 4:14 | — | — | 4:15 | — | — | 4:15 | — | — | 4:15 | — | — | 4:16 | — | — | 4:17 | — |
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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 Mon night. Temperatures will be below freezing (max -1°C on Tue night, min -11°C on Mon night). Mainly severe gales.
South Twin Sister Weather (Days 3-6):
A moderate fall of snow, heaviest on Thu night. Freeze-thaw conditions (max 2°C on Sun morning, min -8°C on Fri morning). Mainly fresh winds.
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 |
|---|---|---|---|---|---|
 | |||||
SHIP3108 |
* 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.