– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 pm Wed 11 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 pm Wed 11 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Wed 11 Mar 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 Thu afternoon. Freeze-thaw conditions (max 1°C on Wed night, min -9°C on Fri night). Winds decreasing (gales from the W on Wed night, calm by Fri morning). | Days 5–7 Weather SummaryA light fall of snow, heaviest on Sun night. Turning milder with light rain (total 5mm) on Mon afternoon. Freeze-thaw conditions (max 8°C on Tue morning, min -8°C on Sat afternoon). Wind will be generally light. | ||||||||||||||||
Wed 11 | Thursday 12 | Friday 13 | Saturday 14 | Sunday 15 | Monday 16 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  | |  |  | |  |  |  | | | | | |  | |  | |
light snow | mod. snow | light snow | mod. snow | heavy snow | light snow | cloudy | some clouds | snow shwrs | snow shwrs | some clouds | cloudy | light snow | heavy snow | light rain | light rain | rain shwrs | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
5 | 7 | 2 | 8 | 15 | 1 | — | — | 2 | 1 | — | — | 2 | 12 | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | 0.4 | 4 | 0.1 | |
max °C | 0 | 1 | -8 | -7 | -7 | -7 | -6 | -6 | -8 | -8 | -6 | -5 | -4 | 1 | 3 | 4 | 6 |
min °C | -3 | -7 | -8 | -7 | -7 | -7 | -6 | -9 | -9 | -8 | -7 | -6 | -6 | -3 | 2 | 3 | 4 |
-11 | -18 | -19 | -15 | -13 | -10 | -8 | -13 | -14 | -14 | -11 | -6 | -11 | -8 | -2 | -2 | 1 | |
1550 | 600 | 500 | 450 | 400 | 550 | 650 | 0 | 400 | 500 | 0 | 700 | 750 | 1500 | 2850 | 2700 | 2950 | |
Cloud base (m) | 550 | 600 | 600 | 600 | 600 | 600 | 550 | 600 | 600 | 700 | 800 | 2350 | 800 | 600 | 600 | 600 | 600 |
 | — | — | 7:28 | — | — | 7:26 | — | — | 7:22 | — | — | 7:20 | — | — | 7:18 | — | — |
 | 7:06 | — | — | 7:07 | — | — | 7:08 | — | — | 7:10 | — | — | 7:12 | — | — | 7:14 | — |
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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 Thu afternoon. Freeze-thaw conditions (max 1°C on Wed night, min -9°C on Fri night). Winds decreasing (gales from the W on Wed night, calm by Fri morning).
South Twin Sister Weather (Days 3-6):
A light fall of snow, heaviest on Sun night. Turning milder with light rain (total 5mm) on Mon afternoon. Freeze-thaw conditions (max 8°C on Tue morning, min -8°C on Sat afternoon). 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 |
|---|---|---|---|---|---|
 | |||||
SHIP4032 | |||||
SHIP4512 |
* 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.