– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 10 am Wed 25 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 am Wed 25 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Wed 25 Mar Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryA heavy fall of snow, heaviest during Wed afternoon. Freeze-thaw conditions (max 2°C on Fri night, min -8°C on Thu morning). Winds decreasing (fresh winds from the WSW on Wed night, calm by Thu night). | Days 4–6 Weather SummaryA light covering of new snow mostly falling on Mon afternoon. Temperatures will be below freezing (max 0°C on Sat morning, min -6°C on Mon night). Wind will be generally light. | |||||||||||||||||
Wednesday 25 | Thursday 26 | Friday 27 | Saturday 28 | Sunday 29 | Monday 30 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  | | |  |  | | | | | | | |  | |
light snow | mod. snow | heavy snow | snow shwrs | some clouds | some clouds | some clouds | some clouds | cloudy | cloudy | cloudy | some clouds | cloudy | cloudy | cloudy | light snow | mod. snow | light snow | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
2 | 8 | 11 | 1 | — | — | — | — | — | — | — | — | — | — | — | 1 | 6 | 1 | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -4 | -4 | -7 | -7 | -4 | -1 | 1 | 1 | 2 | 0 | -1 | -1 | -3 | -1 | -2 | -3 | -4 | -4 |
min °C | -4 | -6 | -7 | -8 | -5 | -4 | 0 | 1 | 1 | -1 | -2 | -3 | -3 | -2 | -3 | -3 | -4 | -6 |
-11 | -14 | -15 | -13 | -8 | -4 | -3 | 0 | -1 | -3 | -4 | -7 | -6 | -5 | -8 | -7 | -7 | -9 | |
1000 | 650 | 400 | 700 | 950 | 0 | 1700 | 1800 | 1700 | 1350 | 1350 | 950 | 1100 | 1300 | 1150 | 1000 | 850 | 500 | |
Cloud base (m) | 750 | 700 | 600 | 900 | 1900 | 600 | 1750 | 2550 | 600 | 750 | 2000 | 2050 | 850 | 850 | 1600 | 600 | 550 | 550 |
 | 7:01 | — | — | 6:58 | — | — | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — | 6:50 | — | — |
 | — | 7:27 | — | — | 7:29 | — | — | 7:30 | — | — | 7:31 | — | — | 7:32 | — | — | 7:35 | — |
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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 Wed afternoon. Freeze-thaw conditions (max 2°C on Fri night, min -8°C on Thu morning). Winds decreasing (fresh winds from the WSW on Wed night, calm by Thu night).
South Twin Sister Weather (Days 3-6):
A light covering of new snow mostly falling on Mon afternoon. Temperatures will be below freezing (max 0°C on Sat morning, min -6°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 |
|---|---|---|---|---|---|
 | |||||
SHIP4339 | |||||
SHIP8375 |
* 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.