– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 10 pm Mon 13 Apr Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 pm Mon 13 Apr Local Time
Updates in:
Update imminent hr min s
Issued: 10 pm Mon 13 Apr 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 Tue afternoon. Temperatures will be below freezing (max -4°C on Mon night, min -12°C on Tue night). Winds decreasing (near gales from the SSW on Tue afternoon, light winds from the W by Wed afternoon). | Days 5–7 Weather SummaryA dusting of new snow. Freeze-thaw conditions (max 2°C on Sat night, min -7°C on Thu night). Winds increasing (calm on Fri morning, fresh winds from the SSE by Sun morning). | ||||||||||||||||||
Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | ||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | |  | |  | |  | | | |  | |  | |  |  | |
light snow | mod. snow | heavy snow | snow shwrs | heavy snow | snow shwrs | snow shwrs | some clouds | snow shwrs | some clouds | some clouds | some clouds | some clouds | cloudy | cloudy | light rain | cloudy | light snow | mod. snow | |
km/h | |||||||||||||||||||
 |  |  |  |  |  |  | |||||||||||||
3 | 8 | 13 | 11 | 13 | 4 | 1 | — | 2 | — | — | — | — | — | — | — | — | 1 | 9 | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 0.1 | — | — | — | |
max °C | -4 | -6 | -6 | -6 | -11 | -10 | -9 | -8 | -7 | -7 | -6 | -4 | -3 | -2 | 0 | 2 | 2 | 0 | -2 |
min °C | -7 | -7 | -6 | -12 | -11 | -11 | -10 | -9 | -8 | -7 | -6 | -5 | -4 | -2 | -1 | 1 | 2 | -1 | -4 |
-15 | -17 | -16 | -22 | -19 | -17 | -17 | -15 | -14 | -12 | -8 | -5 | -7 | -6 | -7 | -4 | -4 | -7 | -11 | |
1100 | 1050 | 1050 | 450 | 650 | 800 | 250 | 800 | 1000 | 300 | 950 | 1200 | 1100 | 1850 | 2100 | 2350 | 2400 | 2050 | 1550 | |
Cloud base (m) | 550 | 550 | 550 | 600 | 550 | 550 | 700 | 600 | 650 | 1550 | 650 | 650 | 750 | 650 | 2350 | 1950 | 1800 | 850 | 550 |
 | — | 6:18 | — | — | 6:16 | — | — | 6:15 | — | — | 6:13 | — | — | 6:11 | — | — | 6:09 | — | — |
 | — | — | 7:57 | — | — | 7:59 | — | — | — | 8:00 | — | — | 8:01 | — | — | 8:02 | — | — | 8:04 |
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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 afternoon. Temperatures will be below freezing (max -4°C on Mon night, min -12°C on Tue night). Winds decreasing (near gales from the SSW on Tue afternoon, light winds from the W by Wed afternoon).
South Twin Sister Weather (Days 3-6):
A dusting of new snow. Freeze-thaw conditions (max 2°C on Sat night, min -7°C on Thu night). Winds increasing (calm on Fri morning, fresh winds from the SSE by Sun morning).
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.