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Forecast Addendum 4/12/2023 - 07:00am

Submitted by efalconer on Wed, 04/12/2023 - 5:31am
Recent Observations: 

Findings from yesterday’s observation on Gray Butte reveled lower elevation south and east aspects quickest to heat up and become unstable. Wet-loose slides were easiest to initiate near rock outcroppings and on slopes steeper than 30 degrees displaying penetrable depths greater than 10 cm (5 in). Past wet-loose activity was abundant below south and east ridgelines with paths running hundreds of feet with large debris piles. No natural wet-loose activity was observed during the hours of 1000 to 1300. Cornices continue to dominate north and east ridgelines. Surface snow near ridge tops on northerly aspects did not re-warm due to wind chill, while northerly mid-slope faces presented some softening in exposed areas. A strong northwest wind aloft was observed blowing snow off the summit of Mount Shasta for the duration of my tour. No recent wet-loose activity was spotted above treeline on Mount Shasta. 

Photo: Northeast aspect of Gray Butte near treeline. 

Mountain Weather: 

Today will remain dry with temperatures at 8,000 feet resting near freezing levels with the potential to creep higher. Mostly clear skies with a light to moderate westerly wind shifting to a northerly direction by the day's end is expected.

An upper level trough swinging over-head is causing shower activity across much of the western and northern Cascades. The Mount Shasta region remains south of the activity and will not receive as inclement of weather compared to our Oregon neighbors. Cold temperatures associated with this front will continue to seep into the region from the north with freezing levels dropping most significantly Thursday morning. Ridging will build over head Thursday, leading into a dry and warming trend through Saturday.

Today 7-8 Weather : 
Mostly sunny. A 20 percent chance of snow showers after 11am
Today 7-8 Wind Direction: 
NW
Today 8-9 Weather: 
Mostly sunny with wind chill values as low as -18. 20 percent chance of snow showers after 11am
Today 8-9 Wind Direction: 
W
Tomorrow 7-8 Weather: 
Sunny
Tomorrow 7-8 Wind Direction: 
N
Tomorrow 8-9 Weather: 
Sunny. Wind chill values as low as -21
Tomorrow 8-9 Wind Direction: 
N
Tonight 7-8 Weather: 
Mostly clear, with wind chill values as low as -1. Winds could gust as high as 41 mph
Tonight 7-8 Wind Direction: 
N
Tonight 8-9 Weather: 
Mostly clear. Wind chill values as low as -30. Winds could gust as high as 90 mph
Tonight 8-9 Wind Direction: 
N
Today 7-8 Temp: 
32
Today 8-9 Temp: 
15
Tomorrow 7-8 Temp: 
40
Tomorrow 8-9 Temp: 
23
Tonight 7-8 Temp: 
17
Tonight 8-9 Temp: 
2
26
2
29
16
146
0
0
41
41
42
41.5
198
0
0
Grey Butte Temp Cur: 
26.5
Grey Butte Temp Min: 
26.5
Grey Butte Temp Max: 
38.5
Grey Butte Temp Avg: 
31
Grey Butte Wind Cur: 
12
Grey Butte Wind Max: 
21.5
Grey Butte Wind Gust Max: 
42.93
Grey Butte Wind Avg: 
W
Castle Lake Snow Depth: 
178.1
Castle Lake Snow New: 
0
Mount Eddy Temp Cur: 
17.5
Mount Eddy Temp Min: 
17.5
Mount Eddy Temp Max: 
46.5
Mount Eddy Temp Avg: 
33
Mount Eddy Wind Cur: 
1
Mount Eddy Wind Max: 
3
Mount Eddy Wind Gust Max: 
6.94
Mount Eddy Wind Avg: 
ESE
Mount Eddy Snow Depth: 
149.4
Mount Eddy Snow New: 
0
Ash Creek Bowl Temp Cur: 
19.5
Ash Creek Bowl Temp Min: 
19.5
Ash Creek Bowl Temp Max: 
39.5
Ash Creek Bowl Temp Avg: 
31.5
Ash Creek Bowl Snow New: 
0
Ash Creek Ridge Temp Cur: 
14.5
Ash Creek Ridge Temp Min: 
14.5
Ash Creek Ridge Temp Max: 
36
Ash Creek Ridge Temp Avg: 
28
Ash Creek Ridge Wind Cur: 
13
Ash Creek Ridge Wind Max: 
19
Ash Creek Ridge Wind Gust Max: 
40.36
Ash Creek Ridge Wind Avg: 
ESE
Mt. Shasta City Temp Cur: 
34
Mt. Shasta City Temp Min: 
34
Mt. Shasta City Temp Max: 
61
Mt. Shasta City Temp Avg: 
47.5
Mt. Shasta City Wind Cur: 
0
Mt. Shasta City Wind Min: 
0
Mt. Shasta City Wind Max: 
8
Mt. Shasta City Wind Avg: 
2.5
Sand Flat Comments: 
Not responding
Ski Bowl Comments: 
Not responding
Grey Butte Wind Min: 
10.5
Grey Butte Wind Avg: 
14.5
Caslte Lake Comments: 
Temp sensor down
Mount Eddy Wind Min: 
0.5
Mount Eddy Wind Avg: 
1.5
Ash Creek Ridge Wind Min: 
2.5
Ash Creek Ridge Wind Avg: 
9
Sand Flat Snow Settlement: 
1
Ski Bowl Snow Settlement: 
0.3
Castle Lake Snow Settlement: 
3.5
Mount Eddy Snow Settlement: 
2.8
Ash Creek Bowl Snow Settlement: 
16.2
Measured Precipitation Oct: 
40.9
Normal Precipitation Oct: 
31.71
Percent Precipitation Oct: 
129
Measured Precipitation MTD: 
1.18
Normal Precipitation MTD: 
1.17
Percent Precipitation MTD: 
101
Measured Precipitation YTD: 
31.77
Normal Precipitation YTD: 
19.47
Percent Precipitation YTD: 
163
Today SWE: 
0.00
Tonight SWE: 
0.00
Tomorrow SWE: 
0.00
Today Wind Max 7-9: 
15
Tonight Wind Max 7-9: 
20
Tomorrow Wind Max 7-9: 
15
Today Wind Min 7-9: 
5
Tonight Wind Min 7-9: 
10
Tomorrow Wind Min 7-9: 
5
Today Wind Max 9-11: 
30
Tonight Wind Max 9-11: 
40
Tomorrow Wind Max 9-11: 
30
Today Wind Min 9-11: 
20
Tonight Wind Min 9-11: 
30
Tomorrow Wind Min 9-11: 
20
Today Snow Max 7-9: 
0.00
Tonight Snow Max 7-9: 
0.00
Tomorrow Snow Max 7-9: 
0.00
Today Snow Min 7-9: 
0.00
Tonight Snow Min 7-9: 
0.00
Tomorrow Snow Min 7-9: 
0.00
Today Snow Max 9-11: 
0.00
Tonight Snow Max 9-11: 
0.00
Tomorrow Snow Max 9-11: 
0.00
Today Snow Min 9-11: 
0.00
Tonight Snow Min 9-11: 
0.00
Tomorrow Snow Min 9-11: 
0.00
Ash Creek Bowl HS: 
158.5
Weather Station Discussion: 
The table below summarizes data reported from all of our weather stations over the last 24 hours.
Seasonal Stats Discussion: 
The wet season is October 1 through May 1. The table below summarizes recorded vs. normal precipitation amounts for the City of Mount Shasta.
Overall Danger Rating: 
Moderate
Current Time: 
2:00 AM