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Forecast Addendum - 12/31/2022 - 07:00am

Submitted by nmeyers on Sat, 12/31/2022 - 6:01am
Recent Observations: 

Red flags of avalanche danger were present yesterday.  Here is the recap:

  • Mt Shasta, near treeline, Old Ski Bowl, ~8,000 feet, upside down cake snowpack structure: dense, light wind affected snow on top of softer, lower density snow. Slabs ~1 foot thick were easily triggered in pit tests with moderate (Q2) shear quality. Areas with a touch of wind and stiff snow near the surface had the most sensitive test results.
  • Whumpfing felt and heard near treeline in same area of snow pit and stability tests
  • Shooting cracks observed near treeline in the Gray Butte / Mt. Shasta Ski Park area
  • Cracking and blocking observed along small test slopes on Green Butte Ridge
  • Westerly wind was moderate and spatially variable
  • Warming occurred in the afternoon. Snow levels fluctuated between 6,000 to 7,000 feet 



    Below, Old Ski Bowl and Gray Butte weather station data from the recent storms:



     
Mountain Weather: 

An atmospheric river event has brought significant precipitation to the area over the past week. Nearly 4.5 inches of water and 26.5 inches of snow has been recorded at our Old Ski Bowl weather station near treeline on Mt. Shasta. Active weather will taper off today through Sunday, and north/northwest flow will bring windy conditions. The extended term will be an active one, marked by cooler temperatures and wet conditions for the New Year. Systems will begin to enter the area Monday and arrive almost daily through the end of the week. Snow levels will hover between roughly 3,000 and 4,000 feet. Overall, it looks to be an excellent chance to improve drought conditions and build sorely needed mountain snowpack.

For today, N/NW wind will be a thing with cooling temperatures. A chance of snow exists this morning, but accumulation will be minimal, if any. As mentioned, the weather is stepping out for a short set break before firing up for 2023.



Today 7-8 Weather : 
Chance of snow flurries this morning, then partly cloudy, clearing, increasing wind, snow level near 6,500 feet, lowering to 4,000 feet
Today 7-8 Wind Direction: 
N
Today 8-9 Weather: 
Chance of snow this morning, then clearing, mostly cloudy, windy
Today 8-9 Wind Direction: 
N
Tomorrow 7-8 Weather: 
Mostly sunny, clearing
Tomorrow 7-8 Wind Direction: 
N
Tomorrow 8-9 Weather: 
Mostly sunny, windy
Tomorrow 8-9 Wind Direction: 
N
Tonight 7-8 Weather: 
Partly cloudy, breezy
Tonight 7-8 Wind Direction: 
N
Tonight 8-9 Weather: 
Partly cloudy, windy, clearing
Tonight 8-9 Wind Direction: 
N
Today 7-8 Temp: 
34
Today 8-9 Temp: 
21
Tomorrow 7-8 Temp: 
30
Tomorrow 8-9 Temp: 
19
Tonight 7-8 Temp: 
20
Tonight 8-9 Temp: 
7
32
28
34
32
52
0
0
27.5
24.5
33
29.5
75.57
3.6
1.04
Grey Butte Temp Cur: 
26
Grey Butte Temp Min: 
23.5
Grey Butte Temp Max: 
32
Grey Butte Temp Avg: 
28.5
Grey Butte Wind Cur: 
13.5
Grey Butte Wind Max: 
26.5
Grey Butte Wind Gust Max: 
49.07
Grey Butte Wind Avg: 
W
Castle Lake Temp Cur: 
36
Castle Lake Temp Min: 
32
Castle Lake Temp Max: 
40
Castle Lake Temp Avg: 
36.5
Mount Eddy Temp Cur: 
31.5
Mount Eddy Temp Min: 
29
Mount Eddy Temp Max: 
37.5
Mount Eddy Temp Avg: 
34
Mount Eddy Wind Cur: 
1
Mount Eddy Wind Max: 
2.5
Mount Eddy Wind Gust Max: 
5.08
Mount Eddy Wind Avg: 
SSE
Mount Eddy Snow Depth: 
44.5
Mount Eddy Snow New: 
0
Ash Creek Bowl Temp Cur: 
35.5
Ash Creek Bowl Temp Min: 
29
Ash Creek Bowl Temp Max: 
35.5
Ash Creek Bowl Temp Avg: 
31.5
Ash Creek Bowl Snow New: 
3
Ash Creek Ridge Temp Cur: 
25.5
Ash Creek Ridge Temp Min: 
25.5
Ash Creek Ridge Temp Max: 
32
Ash Creek Ridge Temp Avg: 
29
Ash Creek Ridge Wind Cur: 
6.5
Ash Creek Ridge Wind Max: 
33
Ash Creek Ridge Wind Gust Max: 
58.9
Mt. Shasta City Temp Cur: 
39
Mt. Shasta City Temp Min: 
35
Mt. Shasta City Temp Max: 
45
Mt. Shasta City Temp Avg: 
40
Mt. Shasta City Wind Cur: 
0
Mt. Shasta City Wind Min: 
0
Mt. Shasta City Wind Max: 
6
Mt. Shasta City Wind Avg: 
1.5
Mt. Shasta City Wind Avg: 
N
Grey Butte Wind Min: 
12
Grey Butte Wind Avg: 
18
Caslte Lake Comments: 
snow depth n/a
Mount Eddy Wind Min: 
0
Mount Eddy Wind Avg: 
1
Ash Creek Ridge Wind Min: 
0
Ash Creek Ridge Wind Avg: 
10
Sand Flat Snow Settlement: 
0
Ski Bowl Snow Settlement: 
0
Mount Eddy Snow Settlement: 
2.8
Ash Creek Bowl Snow Settlement: 
0
Measured Precipitation Oct: 
9.13
Normal Precipitation Oct: 
12.04
Percent Precipitation Oct: 
76
Measured Precipitation MTD: 
5.8
Normal Precipitation MTD: 
6.41
Percent Precipitation MTD: 
90
Measured Precipitation YTD: 
17.08
Normal Precipitation YTD: 
37.42
Percent Precipitation YTD: 
46
Today SWE: 
0.15
Tonight SWE: 
0.00
Tomorrow SWE: 
0.00
Today Wind Max 7-9: 
20
Tonight Wind Max 7-9: 
15
Tomorrow Wind Max 7-9: 
15
Today Wind Min 7-9: 
10
Tonight Wind Min 7-9: 
5
Tomorrow Wind Min 7-9: 
5
Today Wind Max 9-11: 
25
Tonight Wind Max 9-11: 
35
Tomorrow Wind Max 9-11: 
25
Today Wind Min 9-11: 
15
Tonight Wind Min 9-11: 
25
Tomorrow Wind Min 9-11: 
15
Today Snow Max 7-9: 
2.00
Tonight Snow Max 7-9: 
0.00
Tomorrow Snow Max 7-9: 
0.00
Today Snow Min 7-9: 
0.50
Tonight Snow Min 7-9: 
0.00
Tomorrow Snow Min 7-9: 
0.00
Today Snow Max 9-11: 
2.00
Tonight Snow Max 9-11: 
0.00
Tomorrow Snow Max 9-11: 
0.00
Today Snow Min 9-11: 
0.50
Tonight Snow Min 9-11: 
0.00
Tomorrow Snow Min 9-11: 
0.00
Ash Creek Bowl HS: 
61
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: 
Considerable
Current Time: 
4:00 AM