South Twin Sister
Weather Forecast, United States

 

Days 0-3 South Twin Sister Weather Summary:

Mostly dry. Mild temperatures (max 7°C on Sun morning, min 3°C on Sat morning). Wind will be generally light.

Days 3-6 South Twin Sister Weather Summary:

A heavy fall of snow, heaviest during Wed night. Freeze-thaw conditions (max 7°C on Tue morning, min -3°C on Thu night). Winds increasing (light winds from the SSE on Tue night, fresh winds from the S by Wed night).

AM PM night AM PM night AM PM night AM PM night AM PM night AM PM night
clear
clear
clear
clear
clear
clear
clear
clear
clear
partially cloudy
partially cloudy
partially cloudy
light snow
light snow
heavy snow
light snow
moderate snow
heavy snow
Wind km/h
5 E5
10 ENE10
5 ENE5
5 E5
5 SE5
5 SSE5
5 SSE5
5 SSE5
10 SSE10
15 SSE15
15 SSE15
15 SSE15
20 SSE20
15 SSE15
35 S35
20 SE20
30 SSE30
15 SW15
clear clear clear clear clear clear clear clear clear some clouds some clouds some clouds light snow light snow heavy snow light snow mod. snow heavy snow
Rain
Rain mm
- - - - - - - - - - - - - - - - - -
Snow
Snow cm
- - - - - - - - - - - - 2 5 14 3 7 18
High °C
3 5 6 7 7 7 7 7 7 7 6 6 2 0 1 0 -2 -2
Low °C
3 4 5 6 7 7 7 7 6 7 6 3 1 0 -1 -2 -2 -3
Chill °C
1 3 6 6 6 7 6 6 5 4 3 2 -3 -5 -5 -6 -9 -6
Freezing level m
2300 2800 3100 3100 3100 3100 3050 2900 2600 2550 2450 2200 1800 1500 1400 1450 1250 1100
Sea lvl3000ft6000ft9000ft12000ft15000ft
mountain backdrop
134445443321-2-3-3-5-6-73567777777662010-2-21096121181311813119766654
Sunrise
7:18 - - 7:20 - - 7:22 - - 7:22 - - 7:24 - - 7:26 - -
Sunset
- 4:24 - - 4:23 - - 4:22 - - 4:22 - - 4:21 - - 4:20 -

Issued local time.

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.

Live conditions reported by 5 closest weather stations

Weather StationTemp.WeatherWind
Cloud
Visibility
Cloud / Visibility
Lyman
19 km S
155m alt.
1 hour ago
5° C
Dry
0
Calm
(0 kph at 257).
Bellingham
25 km WSW
198m alt.
2 hours ago
3° C
Dry
0
Calm
(0 kph at 225).
Deming
25 km WNW
102m alt.
1 hour ago
2° C
-
3
Calm
(3 kph at 102).
Bellingham
29 km W
71m alt.
2 hours ago
-3° C
-
2
Calm
(2 kph at 270).
Bellingham
32 km W
130m alt.
2 hours ago
-
0
Calm
(0 kph at 304).

* 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. We also include passing Ship data if it is recorded close to South Twin Sister and within an acceptable time window.