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Forecast Addendum 4/1/2023 - 07:00am

Submitted by nmeyers on Sat, 04/01/2023 - 5:12am
Recent Observations: 
  • Yesterday hosted obscured sky with gradually increasing, westerly wind over higher terrain. Temperatures ranged from 21° to 33°. Wind has blow predominantly out of the west, averaging 13 mi/hr with gusts to 42 mi/hr
  • Our day brought us to the south end of the forecast area, in the Castle Crags, Whalan Summit, Mumbo Basin area with a snow machine approach via Castle Creek road (FS25). Precipitation was attempted, but no accumulation was observed. Snow level lingered near 4,000 feet
  • Snow survey was conducted at the Whalan and Mumbo sites, with average snow depths of 145 and 129 inches respectively.
  • We continue to find evidence of a west side weak layer in the snowpack that has resulted in several large avalanches. Yesterday, we found another widely propagating natural avalanche above Mumbo Lake. All of these avalanches occurred earlier in the week, likely on Wednesday. A weak layer of graupel on crust has been buried by two feet of storm snow. Upon stability tests yesterday near the Mumbo avalanche, this layer was stubborn to trigger, but still showed signs of excellent propagation and sheer quality. It would be difficult to trigger an avalanche on this layer, but if you did, a meaty slab is certain
  • A widespread, breakable crust dominates snow surfaces in most areas. Only shady, cold, protected and north facing slopes will hold preserved powder
Mountain Weather: 

More of the same old! Below normal temperatures are going to persist, and it's going to get even colder the second half of this weekend and into early next week. A northwest flow pattern aloft continues to bring wintry weather into the Pacific Northwest from the Gulf of Alaska. Today, a front will move inland, bringing widespread rain and mountain snow. Snow levels are around 3,500 to 4,000 feet. Areas to the north of Mount Shasta, particularly up around Crater Lake, could receive 2 to 4 feet of fresh snow. For us down here, 3 to 5 inches is forecast for Bunny Flat (6,950 feet). Very strong winds out of the west/southwest will blow above treeline.



       

Today 7-8 Weather : 
Snow before 11am, then snow showers after 11am. The snow could be heavy at times. Breezy. Snow level near 4,100 feet
Today 7-8 Wind Direction: 
SW
Today 8-9 Weather: 
Snow before 11am, then snow showers after 11am. The show could be heavy at times. Windy
Today 8-9 Wind Direction: 
W
Tomorrow 7-8 Weather: 
Snow showers, mainly after 11am. Snow level near 3,900 feet
Tomorrow 7-8 Wind Direction: 
SW
Tomorrow 8-9 Weather: 
Snow showers, mainly after 11am. Windy
Tomorrow 8-9 Wind Direction: 
W
Tonight 7-8 Weather: 
A 50 percent chance of snow showers. Mostly cloudy. Breezy. Snow level near 3,500 feet
Tonight 7-8 Wind Direction: 
W
Tonight 8-9 Weather: 
A 50 percent chance of snow showers. Mostly cloudy. Windy
Tonight 8-9 Wind Direction: 
W
Today 7-8 Temp: 
29
Today 8-9 Temp: 
18
Tomorrow 7-8 Temp: 
26
Tomorrow 8-9 Temp: 
11
Tonight 7-8 Temp: 
18
Tonight 8-9 Temp: 
5
26
2
29
16
146
0
0
22
19
24.5
22
204.3
0
0
Grey Butte Temp Cur: 
21.5
Grey Butte Temp Min: 
18.5
Grey Butte Temp Max: 
23.5
Grey Butte Temp Avg: 
21
Grey Butte Wind Cur: 
12.5
Grey Butte Wind Max: 
17.5
Grey Butte Wind Gust Max: 
42.93
Grey Butte Wind Avg: 
W
Castle Lake Snow Depth: 
180.2
Castle Lake Snow New: 
0
Mount Eddy Temp Cur: 
25.5
Mount Eddy Temp Min: 
20
Mount Eddy Temp Max: 
33
Mount Eddy Temp Avg: 
26.5
Mount Eddy Wind Cur: 
1.5
Mount Eddy Wind Max: 
3.5
Mount Eddy Wind Gust Max: 
6.43
Mount Eddy Wind Avg: 
SE
Mount Eddy Snow Depth: 
167.8
Mount Eddy Snow New: 
0
Ash Creek Bowl Temp Cur: 
24
Ash Creek Bowl Temp Min: 
20
Ash Creek Bowl Temp Max: 
24.5
Ash Creek Bowl Temp Avg: 
23
Ash Creek Bowl Snow New: 
0
Ash Creek Ridge Temp Cur: 
20.5
Ash Creek Ridge Temp Min: 
16.5
Ash Creek Ridge Temp Max: 
23
Ash Creek Ridge Temp Avg: 
20
Ash Creek Ridge Wind Cur: 
0
Ash Creek Ridge Wind Max: 
0
Ash Creek Ridge Wind Gust Max: 
0
Mt. Shasta City Temp Cur: 
36
Mt. Shasta City Temp Min: 
33
Mt. Shasta City Temp Max: 
41
Mt. Shasta City Temp Avg: 
37
Mt. Shasta City Wind Cur: 
6
Mt. Shasta City Wind Min: 
0
Mt. Shasta City Wind Max: 
6
Mt. Shasta City Wind Avg: 
3
Sand Flat Comments: 
Not responding
Ski Bowl Comments: 
Water content down
Grey Butte Wind Min: 
7.5
Grey Butte Wind Avg: 
14
Caslte Lake Comments: 
Temp sensor down
Mount Eddy Wind Min: 
1
Mount Eddy Wind Avg: 
2
Ash Creek Ridge Wind Min: 
0
Ash Creek Ridge Wind Avg: 
0
Sand Flat Snow Settlement: 
1
Ski Bowl Snow Settlement: 
0.8
Castle Lake Snow Settlement: 
1.5
Mount Eddy Snow Settlement: 
3
Ash Creek Bowl Snow Settlement: 
16.4
Measured Precipitation Oct: 
39.72
Normal Precipitation Oct: 
30.54
Percent Precipitation Oct: 
130
Measured Precipitation MTD: 
10.01
Normal Precipitation MTD: 
5.6
Percent Precipitation MTD: 
179
Measured Precipitation YTD: 
30.59
Normal Precipitation YTD: 
18.3
Percent Precipitation YTD: 
167
Today SWE: 
0.26
Tonight SWE: 
0.01
Tomorrow SWE: 
0.07
Today Wind Max 7-9: 
23
Tonight Wind Max 7-9: 
17
Tomorrow Wind Max 7-9: 
17
Today Wind Min 7-9: 
13
Tonight Wind Min 7-9: 
7
Tomorrow Wind Min 7-9: 
7
Today Wind Max 9-11: 
53
Tonight Wind Max 9-11: 
45
Tomorrow Wind Max 9-11: 
39
Today Wind Min 9-11: 
43
Tonight Wind Min 9-11: 
35
Tomorrow Wind Min 9-11: 
29
Today Snow Max 7-9: 
5.00
Tonight Snow Max 7-9: 
0.50
Tomorrow Snow Max 7-9: 
3.00
Today Snow Min 7-9: 
3.00
Tonight Snow Min 7-9: 
0.00
Tomorrow Snow Min 7-9: 
1.00
Today Snow Max 9-11: 
5.00
Tonight Snow Max 9-11: 
0.50
Tomorrow Snow Max 9-11: 
3.00
Today Snow Min 9-11: 
3.00
Tonight Snow Min 9-11: 
0.00
Tomorrow Snow Min 9-11: 
1.00
Ash Creek Bowl HS: 
158.3
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