– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 10 am Thu 19 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 am Thu 19 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Thu 19 Mar Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryDrizzle on Thu night followed by colder weather and a heavy fall of snow, heaviest during Fri morning. Freeze-thaw conditions (max 2°C on Thu night, min -10°C on Sat morning). Winds decreasing (strong winds from the SW on Thu night, light winds from the WSW by Sat night). | Days 4–6 Weather SummaryA heavy fall of snow, heaviest during Tue night. Temperatures will be below freezing (max -2°C on Tue afternoon, min -13°C on Tue night). Winds increasing (light winds from the WSW on Mon afternoon, near gales from the SW by Tue afternoon). | |||||||||||||||||
Thursday 19 | Friday 20 | Saturday 21 | Sunday 22 | Monday 23 | Tuesday 24 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  | | |  | |  |  | |  | |  |  |  | |  | |
light snow | light snow | light snow | mod. snow | mod. snow | light snow | clear | clear | clear | cloudy | cloudy | some clouds | cloudy | some clouds | snow shwrs | heavy snow | heavy snow | heavy snow | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
5 | 4 | 3 | 10 | 8 | 2 | — | — | — | — | — | — | — | — | 1 | 11 | 12 | 32 | |
— | — | 1.3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | 1 | 1 | 2 | 1 | -1 | -4 | -9 | -9 | -9 | -7 | -6 | -5 | -6 | -5 | -3 | -3 | -2 | -7 |
min °C | 1 | 1 | 1 | 0 | -2 | -7 | -10 | -9 | -9 | -8 | -7 | -6 | -6 | -5 | -5 | -4 | -3 | -13 |
-5 | -6 | -5 | -7 | -8 | -15 | -18 | -17 | -16 | -15 | -14 | -13 | -12 | -11 | -15 | -14 | -12 | -26 | |
2250 | 2400 | 2400 | 2200 | 1900 | 1300 | 750 | 900 | 550 | 1100 | 1150 | 950 | 1100 | 1300 | 1700 | 1200 | 1500 | 350 | |
Cloud base (m) | 600 | 600 | 600 | 550 | 600 | 850 | 650 | 700 | 850 | 1700 | 2000 | 600 | 600 | 750 | 2750 | 600 | 550 | 600 |
 | 7:13 | — | — | 7:11 | — | — | 7:09 | — | — | 7:07 | — | — | 7:05 | — | — | 7:03 | — | — |
 | — | 7:17 | — | — | 7:20 | — | — | 7:21 | — | — | 7:22 | — | — | 7:23 | — | — | 7:25 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Drizzle on Thu night followed by colder weather and a heavy fall of snow, heaviest during Fri morning. Freeze-thaw conditions (max 2°C on Thu night, min -10°C on Sat morning). Winds decreasing (strong winds from the SW on Thu night, light winds from the WSW by Sat night).
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Tue night. Temperatures will be below freezing (max -2°C on Tue afternoon, min -13°C on Tue night). Winds increasing (light winds from the WSW on Mon afternoon, near gales from the SW by Tue afternoon).
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.