– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 pm Thu 14 May Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 pm Thu 14 May Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Thu 14 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. Temperatures will be below freezing (max -3°C on Thu afternoon, min -7°C on Fri night). Wind will be generally light. | Days 5–7 Weather SummaryA dusting of new snow. Freeze-thaw conditions (max 1°C on Wed morning, min -3°C on Sun afternoon). Wind will be generally light. | ||||||||||||||||
Thu 14 | Friday 15 | Saturday 16 | Sunday 17 | Monday 18 | Tuesday 19 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  | |  |  |  | |  |  | | | | |  | |
light snow | heavy snow | mod. snow | mod. snow | mod. snow | light snow | snow shwrs | snow shwrs | some clouds | some clouds | some clouds | clear | some clouds | some clouds | snow shwrs | snow shwrs | clear | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
2 | 13 | 9 | 10 | 9 | 5 | 3 | 1 | — | — | — | — | — | — | 2 | 2 | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -3 | -4 | -6 | -6 | -6 | -7 | -5 | -5 | -4 | -2 | -2 | -2 | -1 | -1 | -3 | -1 | 0 |
min °C | -4 | -6 | -6 | -6 | -7 | -7 | -6 | -5 | -4 | -3 | -2 | -3 | -1 | -2 | -3 | -2 | -1 |
-10 | -14 | -12 | -13 | -13 | -13 | -13 | -11 | -7 | -3 | -2 | -6 | -4 | -7 | -8 | -7 | -5 | |
1650 | 1350 | 1150 | 1250 | 1100 | 1150 | 1450 | 1250 | 1300 | 1650 | 1700 | 1750 | 2050 | 1800 | 1700 | 1900 | 2050 | |
Cloud base (m) | 850 | 600 | 600 | 550 | 600 | 600 | 700 | 600 | 600 | 800 | 1550 | 950 | 2050 | 1650 | 600 | 800 | 1900 |
 | — | — | 5:26 | — | — | 5:24 | — | — | 5:24 | — | — | 5:22 | — | — | 5:22 | — | — |
 | — | 8:39 | — | — | 8:42 | — | — | 8:43 | — | — | 8:44 | — | — | 8:45 | — | — | 8:46 |
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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. Temperatures will be below freezing (max -3°C on Thu afternoon, min -7°C on Fri night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
A dusting of new snow. Freeze-thaw conditions (max 1°C on Wed morning, min -3°C on Sun afternoon). Wind will be generally light.
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.
| Weather Station | Temp. | Weather | Wind | Gusts | Cloud / Visibility |
|---|---|---|---|---|---|
lightning 7km SE of Sudden Valley |  | ||||
lightning 10km ENE of Clear Lake | | ||||
* NOTE: not all weather observatories update at the same frequency which is the reason why some locations may show data from stations that are further away than known closer ones.