– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 10 am Sun 25 Oct Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Sun 25 Oct 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 Tue night. Temperatures will be below freezing (max 0°C on Sun night, min -6°C on Tue night). Wind will be generally light. | Days 4–6 Weather SummaryA dusting of new snow. Temperatures will be below freezing (max -2°C on Fri night, min -6°C on Wed morning). Wind will be generally light. | |||||||||||||||||
Sunday 25 | Monday 26 | Tuesday 27 | Wednesday 28 | Thursday 29 | Friday 30 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | |  | | |  |  | | | |  |  | | |  | |
light snow | snow shwrs | cloudy | cloudy | cloudy | light snow | snow shwrs | light snow | heavy snow | some clouds | light snow | light snow | some clouds | clear | some clouds | clear | some clouds | clear | |
Cloud base (m) | 700 | 700 | 2200 | 850 | 900 | 600 | 650 | 700 | 550 | 600 | 650 | 600 | 850 | 2250 | 2150 | 1500 | 1550 | 6800 |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | 3 | 1 | — | — | — | 3 | 1 | 3 | 13 | — | 2 | 2 | — | — | — | — | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
max °C | -2 | -1 | 0 | -1 | -2 | -3 | -4 | -5 | -6 | -6 | -5 | -5 | -5 | -4 | -4 | -4 | -4 | -2 |
min °C | -2 | -1 | -1 | -1 | -2 | -4 | -4 | -5 | -6 | -6 | -6 | -5 | -5 | -5 | -5 | -4 | -4 | -3 |
chill °C | -8 | -6 | -5 | -3 | -2 | -8 | -9 | -12 | -12 | -9 | -11 | -10 | -11 | -10 | -11 | -10 | -8 | -7 |
Freezing level m | 1800 | 2000 | 2050 | 1950 | 1650 | 1550 | 1400 | 1350 | 1200 | 1250 | 1300 | 1300 | 1550 | 1600 | 1550 | 1500 | 1600 | 1750 |
 | 7:43 | — | — | 7:43 | — | — | 7:46 | — | — | 7:47 | — | — | 7:48 | — | — | 7:50 | — | — |
 | — | 6:00 | — | — | 5:58 | — | — | 5:55 | — | — | 5:54 | — | — | 5:52 | — | — | 5:51 | — |
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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 Tue night. Temperatures will be below freezing (max 0°C on Sun night, min -6°C on Tue night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
A dusting of new snow. Temperatures will be below freezing (max -2°C on Fri night, min -6°C on Wed morning). 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 |
|---|---|---|---|---|---|
SHIP4755 | |||||
 | |||||
Bellingham Airport |  | ||||
* 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.