– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 10 am Wed 13 May Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 am Wed 13 May Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Wed 13 May Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryLight rain (total 8mm) on Wed morning. Becoming colder with heavy fall of snow, heaviest during Fri afternoon. Freeze-thaw conditions (max 3°C on Wed morning, min -3°C on Fri night). Winds decreasing (fresh winds from the WSW on Wed night, light winds from the W by Thu afternoon). | Days 4–6 Weather SummaryA moderate fall of snow, heaviest on Sat morning. Freeze-thaw conditions (max 3°C on Mon afternoon, min -3°C on Sat morning). Wind will be generally light. | |||||||||||||||||
Wednesday 13 | Thursday 14 | Friday 15 | Saturday 16 | Sunday 17 | Monday 18 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  |  |  |  |  |  | | | | | | | |  |  | |
light snow | light snow | some clouds | some clouds | light rain | snow shwrs | snow shwrs | mod. snow | heavy snow | mod. snow | snow shwrs | snow shwrs | some clouds | snow shwrs | some clouds | some clouds | rain shwrs | rain shwrs | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
2 | 2 | — | — | — | 6 | 2 | 6 | 11 | 6 | 2 | 2 | — | 1 | — | — | — | — | |
8 | — | — | — | 0.4 | — | — | — | — | — | — | — | — | — | — | — | 0.2 | 0.1 | |
max °C | 3 | 2 | 1 | 1 | 2 | 0 | -1 | -1 | -1 | -3 | -1 | -1 | -2 | 0 | 0 | 1 | 3 | 3 |
min °C | 2 | 2 | 0 | 0 | 1 | -1 | -1 | -1 | -3 | -3 | -2 | -3 | -3 | -1 | 0 | 0 | 3 | 2 |
-2 | -3 | -6 | -4 | -2 | -5 | -4 | -6 | -9 | -8 | -6 | -7 | -5 | -3 | -2 | 0 | 2 | 0 | |
1900 | 1800 | 1500 | 1600 | 1600 | 1400 | 1300 | 1300 | 1100 | 1100 | 1350 | 1150 | 1200 | 1550 | 1450 | 1650 | 1900 | 2050 | |
Cloud base (m) | 550 | 600 | 600 | 650 | 900 | 600 | 600 | 600 | 600 | 600 | 600 | 600 | 600 | 700 | 1550 | 1850 | 1750 | |
 | 5:28 | — | — | 5:28 | — | — | 5:26 | — | — | 5:24 | — | — | 5:24 | — | — | 5:22 | — | — |
 | — | — | 8:38 | — | — | 8:39 | — | — | 8:42 | — | — | 8:43 | — | — | 8:44 | — | — | 8:45 |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Light rain (total 8mm) on Wed morning. Becoming colder with heavy fall of snow, heaviest during Fri afternoon. Freeze-thaw conditions (max 3°C on Wed morning, min -3°C on Fri night). Winds decreasing (fresh winds from the WSW on Wed night, light winds from the W by Thu afternoon).
South Twin Sister Weather (Days 3-6):
A moderate fall of snow, heaviest on Sat morning. Freeze-thaw conditions (max 3°C on Mon afternoon, min -3°C on Sat morning). 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.