– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 am Sat 14 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 am Sat 14 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Sat 14 Mar Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryA moderate fall of snow, heaviest on Sun night. Turning milder with moderate rain (total 13mm), heaviest on Mon afternoon. Freeze-thaw conditions (max 5°C on Mon afternoon, min -9°C on Sat morning). Winds increasing (calm on Sat night, fresh winds from the S by Mon morning). | Days 4–6 Weather SummaryA dusting of snow. Milder later with heavy rain (total 76mm) on Thu night. Mild temperatures (max 6°C on Thu afternoon, min 1°C on Tue morning). Winds increasing (light winds from the SSW on Tue night, near gales from the SSW by Thu afternoon). | |||||||||||||||||
Saturday 14 | Sunday 15 | Monday 16 | Tuesday 17 | Wednesday 18 | Thursday 19 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | |  |  |  |  | | |  | |  |  | | | | |
some clouds | snow shwrs | some clouds | cloudy | cloudy | mod. snow | light snow | mod. rain | snow shwrs | light snow | mod. rain | heavy rain | mod. rain | light rain | mod. rain | light rain | mod. rain | heavy rain | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
— | 1 | — | — | — | 8 | 1 | — | 1 | 3 | — | — | — | — | — | — | — | — | |
— | — | — | — | — | — | 4 | 8 | 0.3 | — | 5 | 13 | 6 | 5 | 8 | 1.9 | 7 | 30 | |
max °C | -9 | -8 | -7 | -5 | -3 | 0 | 2 | 5 | 4 | 2 | 4 | 4 | 3 | 3 | 5 | 5 | 6 | 5 |
min °C | -9 | -9 | -7 | -6 | -5 | -3 | 1 | 3 | 2 | 1 | 3 | 4 | 3 | 2 | 4 | 5 | 5 | 5 |
-15 | -16 | -10 | -6 | -10 | -9 | -5 | -3 | -4 | -6 | -2 | 2 | -4 | -4 | -2 | 0 | 0 | 1 | |
450 | 550 | 0 | 800 | 900 | 1650 | 2450 | 2350 | 2000 | 2100 | 2350 | 2500 | 2150 | 2200 | 2200 | 2550 | 2800 | 2500 | |
Cloud base (m) | 700 | 700 | 1000 | 2150 | 2100 | 600 | 600 | 600 | 750 | 650 | 550 | 550 | 600 | 600 | 600 | 600 | 550 | 600 |
 | 7:22 | — | — | 7:20 | — | — | 7:18 | — | — | 7:16 | — | — | 7:15 | — | — | 7:13 | — | — |
 | — | 7:10 | — | — | 7:12 | — | — | 7:14 | — | — | 7:15 | — | — | 7:16 | — | — | 7:17 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: A moderate fall of snow, heaviest on Sun night. Turning milder with moderate rain (total 13mm), heaviest on Mon afternoon. Freeze-thaw conditions (max 5°C on Mon afternoon, min -9°C on Sat morning). Winds increasing (calm on Sat night, fresh winds from the S by Mon morning).
South Twin Sister Weather (Days 3-6):
A dusting of snow. Milder later with heavy rain (total 76mm) on Thu night. Mild temperatures (max 6°C on Thu afternoon, min 1°C on Tue morning). Winds increasing (light winds from the SSW on Tue night, near gales from the SSW by Thu afternoon).
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.