– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 4 am Thu 08 Oct Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Thu 08 Oct Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryMild with light rain (total 2mm) on Thu night Becoming colder with a light covering of snow, mostly falling on Fri morning. Freeze-thaw conditions (max 10°C on Thu morning, min -5°C on Fri night). Winds decreasing (strong winds from the WSW on Fri morning, calm by Fri night). | Days 4–6 Weather SummaryA moderate fall of snow, heaviest on Tue night. Freeze-thaw conditions (max 4°C on Mon morning, min -5°C on Tue night). Winds increasing (light winds from the NW on Mon morning, near gales from the WSW by Tue night). | |||||||||||||||||
Thursday 8 | Friday 9 | Saturday 10 | Sunday 11 | Monday 12 | Tuesday 13 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | |  | | |  | | | | | |  |  |  |  | |
some clouds | clear | rain shwrs | snow shwrs | snow shwrs | snow shwrs | some clouds | some clouds | clear | clear | clear | clear | clear | some clouds | some clouds | light rain | light snow | heavy snow | |
Cloud base (m) | 8400 | 9300 | 750 | 550 | 600 | 650 | 750 | 900 | 9200 | 3250 | 1500 | 800 | 600 | |||||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | 3 | 2 | 1 | — | — | — | — | — | — | — | — | — | — | 2 | 16 |
mm | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | 0.1 | — | — |
max °C | 10 | 9 | 8 | 0 | -2 | -4 | -4 | -2 | -1 | -1 | 1 | 3 | 4 | 4 | 4 | 3 | 2 | 0 |
min °C | 10 | 9 | 2 | -1 | -3 | -5 | -5 | -3 | -1 | -1 | 0 | 2 | 3 | 4 | 3 | 2 | 2 | -5 |
chill °C | 8 | 6 | -5 | -7 | -8 | -8 | -10 | -8 | -5 | -5 | -3 | -1 | 1 | 0 | -2 | -3 | -4 | -12 |
Freezing level m | 3850 | 3700 | 2850 | 1950 | 1600 | 1400 | 1450 | 1850 | 1900 | 1950 | 2300 | 3250 | 3600 | 3300 | 2850 | 2500 | 2400 | 1350 |
 | 7:16 | — | — | 7:18 | — | — | 7:20 | — | — | 7:20 | — | — | 7:22 | — | — | 7:24 | — | — |
 | — | 6:32 | — | — | 6:30 | — | — | 6:29 | — | — | 6:27 | — | — | 6:24 | — | — | 6:22 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Mild with light rain (total 2mm) on Thu night Becoming colder with a light covering of snow, mostly falling on Fri morning. Freeze-thaw conditions (max 10°C on Thu morning, min -5°C on Fri night). Winds decreasing (strong winds from the WSW on Fri morning, calm by Fri night).
South Twin Sister Weather (Days 3-6):
A moderate fall of snow, heaviest on Tue night. Freeze-thaw conditions (max 4°C on Mon morning, min -5°C on Tue night). Winds increasing (light winds from the NW on Mon morning, near gales from the WSW by Tue 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 |
|---|---|---|---|---|---|
SHIP4222 | |||||
 | |||||
Bellingham Airport | | ||||
SHIP5016 | |||||
SHIP1275 | |||||
SHIP1710 | |||||
SHIP1956 | |||||
SHIP2682 |
* 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.