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Forecast Addendum - 12/1/2022 - 07:00am

Submitted by nmeyers on Thu, 12/01/2022 - 5:31am
Recent Observations: 
  • Starting October 1st, precipitation for the wet season is 59% of normal. The mountain received an early season storm in November that brought ~30 inches of snow to areas 6,500 feet and above. What remains of that can be seen in yesterday's pre-snowfall-observation
  • Overnight, ~16 inches of new snow fell at treeline on Mount Shasta, beginning at 1700 hours and continuing into this morning. Snow/water equivalent (SWE) is .65 inches. Snowfall rates exceeded 2 inches per hour at times
  • Currently, the height of snow near treeline is 33 inches
  • Over the last 24 hours, we've had a low of 18 ºF and high of 20 ºF. West/southwest wind averaged 14 mi/hr with gusts to 43 mi/hr
  • Snow surfaces prior to the storm have been rough. The snowpack was patchy below 7,200 feet, average snow depths of ~10 inches. A widespread melt-freeze crust was observed over the snowpack. 
  • Many rocks, trees, stumps and other earthly objects still remain exposed. Above treeline is a salt and pepper, snow and rock minefield. If the mountain snowpack was equated to jeans, it would be wearing the skinny kind! Nonetheless, the new snow last night and this weekend will really boost us into proper winter snow coverage.
  • Finding continuous snow from Bunny Flat is possible, and the road is covered past the gate. The Sand Flat Winter XC-Ski trails should be coming into better shape very soon and with a little more snow, 4x4 tracks will diminish.
  • Observations from the Castle Lake, Eddy Mountains and East of Mount Shasta are limited, but soon to come. 
Mountain Weather: 

The winter storm that rolled through last night will taper off today. Lingering snow showers are likely this morning, with snow levels to town, or lower. Southwest wind will persist and provide for full value conditions above treeline. Don't be surprised to experience wind gusts 50+ mi/hr over exposed, alpine terrain. Wind chill factor will be below zero. Overnight low temperatures are going to be quite cold, single digits to below zero in some areas. The area will get a short break in the action before additional winter weather arrives into Northern California Saturday night or Sunday. The extended period will commence with a cold upper level low off the Pacific Northwest coast and strong southwest flow aloft over the forecast area.

Today 7-8 Weather : 
Snow, mainly before 4pm. Temperatures falling. Chance of precipitation 90%.
Today 7-8 Wind Direction: 
SW
Today 8-9 Weather: 
Snow, mainly before 4pm. Windy with widespread blowing snow.
Today 8-9 Wind Direction: 
W
Tomorrow 7-8 Weather: 
Partly cloudy becoming mostly cloudy
Tomorrow 7-8 Wind Direction: 
S
Tomorrow 8-9 Weather: 
Mostly sunny, cold and windy. Widespread blowing snow
Tomorrow 8-9 Wind Direction: 
W
Tonight 7-8 Weather: 
Partly cloudy, with a 20% chance of snow before 10pm. Blustery.
Tonight 7-8 Wind Direction: 
W
Tonight 8-9 Weather: 
A 20% chance of snow before 10pm. Windy with widespread blowing snow.
Tonight 8-9 Wind Direction: 
W
Today 7-8 Temp: 
23
Today 8-9 Temp: 
9
Tomorrow 7-8 Temp: 
18
Tomorrow 8-9 Temp: 
8
Tonight 7-8 Temp: 
10
Tonight 8-9 Temp: 
-3
24
23
25
24
20.5
18.5
21.5
19.5
33.2
16
0.65
Grey Butte Temp Cur: 
19
Grey Butte Temp Min: 
16.5
Grey Butte Temp Max: 
19.5
Grey Butte Temp Avg: 
18
Grey Butte Wind Cur: 
21.5
Grey Butte Wind Max: 
22.5
Grey Butte Wind Gust Max: 
42.93
Grey Butte Wind Avg: 
WSW
Castle Lake Temp Cur: 
25.5
Castle Lake Temp Min: 
23
Castle Lake Temp Max: 
26.5
Castle Lake Temp Avg: 
25
Mount Eddy Temp Cur: 
23.5
Mount Eddy Temp Min: 
21
Mount Eddy Temp Max: 
26
Mount Eddy Temp Avg: 
23.5
Mount Eddy Wind Cur: 
1.5
Mount Eddy Wind Max: 
2.5
Mount Eddy Wind Gust Max: 
6.23
Mount Eddy Wind Avg: 
S
Mount Eddy Snow Depth: 
28.97
Ash Creek Bowl Temp Cur: 
22
Ash Creek Bowl Temp Min: 
18.5
Ash Creek Bowl Temp Max: 
23.5
Ash Creek Bowl Temp Avg: 
20.5
Ash Creek Bowl Snow New: 
8
Ash Creek Ridge Temp Cur: 
18.5
Ash Creek Ridge Temp Min: 
15
Ash Creek Ridge Temp Max: 
19
Ash Creek Ridge Temp Avg: 
17
Ash Creek Ridge Wind Cur: 
0
Ash Creek Ridge Wind Max: 
18.5
Ash Creek Ridge Wind Gust Max: 
31.77
Ash Creek Ridge Wind Avg: 
SW
Mt. Shasta City Temp Cur: 
34
Mt. Shasta City Temp Min: 
33
Mt. Shasta City Temp Max: 
37
Mt. Shasta City Temp Avg: 
35
Mt. Shasta City Wind Cur: 
3
Mt. Shasta City Wind Min: 
0
Mt. Shasta City Wind Max: 
8
Mt. Shasta City Wind Avg: 
4.5
Mt. Shasta City Wind Avg: 
ESE
Sand Flat Comments: 
snow depth n/a
Grey Butte Wind Min: 
7
Grey Butte Wind Avg: 
14.5
Caslte Lake Comments: 
snow depth n/a
Mount Eddy Wind Min: 
1.5
Mount Eddy Wind Avg: 
1.5
Mount Eddy Comments: 
snow depth n/a
Ash Creek Ridge Wind Min: 
0
Ash Creek Ridge Wind Avg: 
6.5
Ski Bowl Snow Settlement: 
0
Ash Creek Bowl Snow Settlement: 
0
Measured Precipitation Oct: 
3.33
Normal Precipitation Oct: 
5.63
Percent Precipitation Oct: 
59
Measured Precipitation MTD: 
3.23
Normal Precipitation MTD: 
3.63
Percent Precipitation MTD: 
89
Measured Precipitation YTD: 
11.28
Normal Precipitation YTD: 
31.01
Percent Precipitation YTD: 
36
Today SWE: 
0.15
Tonight SWE: 
0.00
Tomorrow SWE: 
0.00
Today Wind Max 7-9: 
15
Tonight Wind Max 7-9: 
10
Tomorrow Wind Max 7-9: 
10
Today Wind Min 7-9: 
10
Tonight Wind Min 7-9: 
5
Tomorrow Wind Min 7-9: 
5
Today Wind Max 9-11: 
35
Tonight Wind Max 9-11: 
35
Tomorrow Wind Max 9-11: 
30
Today Wind Min 9-11: 
25
Tonight Wind Min 9-11: 
25
Tomorrow Wind Min 9-11: 
20
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: 
1.00
Tonight Snow Min 7-9: 
0.00
Tomorrow Snow Min 7-9: 
0.00
Today Snow Max 9-11: 
3.00
Tonight Snow Max 9-11: 
0.00
Tomorrow Snow Max 9-11: 
0.00
Today Snow Min 9-11: 
1.00
Tonight Snow Min 9-11: 
0.00
Tomorrow Snow Min 9-11: 
0.00
Ash Creek Bowl HS: 
31.68
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: 
4:00 AM