– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 pm Wed 13 May Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 pm Wed 13 May Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Wed 13 May 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 Fri night. Freeze-thaw conditions (max 2°C on Wed afternoon, min -3°C on Sat morning). Winds decreasing (fresh winds from the WSW on Wed night, light winds from the SW by Thu night). | Days 5–7 Weather SummaryA light covering of new snow mostly falling on Tue morning. Freeze-thaw conditions (max 3°C on Mon afternoon, min -3°C on Sat night). Wind will be generally light. | ||||||||||||||||
Wed 13 | Thursday 14 | Friday 15 | Saturday 16 | Sunday 17 | Monday 18 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  | |  |  | | |  |  |  | | |  |  | |
light snow | light snow | snow shwrs | light snow | mod. snow | light snow | mod. snow | heavy snow | light snow | snow shwrs | some clouds | cloudy | some clouds | some clouds | some clouds | light rain | rain shwrs | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
3 | 2 | 1 | 1 | 7 | 3 | 8 | 11 | 3 | 2 | — | — | — | — | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 0.6 | 0.2 | |
max °C | 2 | 1 | 1 | 2 | 0 | -1 | -1 | -1 | -2 | -1 | -1 | -2 | 1 | 1 | 1 | 3 | 3 |
min °C | 2 | 0 | 0 | 1 | -1 | -2 | -1 | -2 | -3 | -2 | -3 | -3 | 0 | 1 | 0 | 2 | 2 |
-3 | -6 | -4 | -3 | -6 | -7 | -5 | -7 | -7 | -6 | -6 | -3 | -2 | 1 | -2 | 0 | 0 | |
1800 | 1450 | 1650 | 1700 | 1400 | 1250 | 1300 | 1100 | 1150 | 1350 | 1200 | 1300 | 1600 | 1650 | 1700 | 1950 | 1800 | |
Cloud base (m) | 600 | 650 | 700 | 1750 | 600 | 600 | 600 | 600 | 600 | 600 | 600 | 650 | 850 | 2500 | 950 | 1600 | 900 |
 | — | — | 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: A heavy fall of snow, heaviest during Fri night. Freeze-thaw conditions (max 2°C on Wed afternoon, min -3°C on Sat morning). Winds decreasing (fresh winds from the WSW on Wed night, light winds from the SW by Thu night).
South Twin Sister Weather (Days 3-6):
A light covering of new snow mostly falling on Tue morning. Freeze-thaw conditions (max 3°C on Mon afternoon, min -3°C on Sat 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.