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Forecast Addendum - 12/18/2021 - 07:00am

Submitted by nmeyers on Sat, 12/18/2021 - 6:01am
Recent Observations: 

Over the past week, the Old Ski Bowl weather station at treeline on Mount Shasta has recorded 76.2 inches of snow, with a snow/water equivalent of 3.12 inches. About 20 inches of snow existed on the ground above 8,500 feet prior to the storms. Over on the west side in the Castle Lake area, 35 inches of snow fell on mostly bare ground.  The storm snow is settling out well, with 5-8 inches of settlement observed. Above treeline, strong wind out of the S-SW-W-NW has created light to heavy wind texturing, depending on location. Ridgelines are scoured and have rocks showing.

We have not observed or had any reports of avalanches over the past week. Signs of avalanche risk in the past few days have diminished and things are looking pretty safe out there, for the time being.  See several recent observations below with more details from the past couple days.

Don't forget about the five MSAC weather stations across the local land. You can access them all via the weather tab.

 

Mountain Weather: 

Dry weather is expected through Sunday night, with partly cloudy skies. The wind is notable however and going to pick up out of the southwest later today. Above treeline and in other exposed areas throughout the forecast area, expect wind speeds upwards of 30-40 mi/hr tonight and into Sunday and Monday. Near and below treeline, wind should be light. Temperatures will remain nippy, falling a couple degrees tomorrow, so wind chill will be a significant environmental hazard if heading into the alpine. Looking out into the future, next week will start with southerly flow, which favors Mt. Shasta for gusty winds and some precipitation. The first bit of precipitation is expected Monday night into Tuesday. Snow levels will be near town and several inches of snow is in the forecast. This storm won't be as robust as the last, but we're not looking the gift horse in the mouth. Additional systems are likely to impact the forecast area through the rest of the week, shaping up to be a white Christmas. Grease the skids, Santa!

Today 7-8 Weather : 
Mostly sunny
Today 7-8 Wind Direction: 
SW
Today 8-9 Weather: 
Mostly sunny and windy
Today 8-9 Wind Direction: 
W
Tomorrow 7-8 Weather: 
Breezy, slight chance of snow
Tomorrow 7-8 Wind Direction: 
S
Tomorrow 8-9 Weather: 
Partly sunny and windy
Tomorrow 8-9 Wind Direction: 
SW
Tonight 7-8 Weather: 
Mostly cloudy, slight chance of snow
Tonight 7-8 Wind Direction: 
South
Tonight 8-9 Weather: 
Mostly cloudy and windy
Tonight 8-9 Wind Direction: 
SW
Today 7-8 Temp: 
38
Today 8-9 Temp: 
27
Tomorrow 7-8 Temp: 
35
Tomorrow 8-9 Temp: 
24
Tonight 7-8 Temp: 
27
Tonight 8-9 Temp: 
24
32
13
32
24
31.5
27
41.5
32
59.67
0
0
Grey Butte Temp Cur: 
33.5
Grey Butte Temp Min: 
26.5
Grey Butte Temp Max: 
35.5
Grey Butte Temp Avg: 
32
Grey Butte Wind Cur: 
6
Grey Butte Wind Max: 
15.5
Grey Butte Wind Avg: 
WNW
Castle Lake Temp Cur: 
30.5
Castle Lake Temp Min: 
19.5
Castle Lake Temp Max: 
31
Castle Lake Temp Avg: 
27
Castle Lake Snow Depth: 
34.02
Castle Lake Snow New: 
0
Mount Eddy Temp Cur: 
34.5
Mount Eddy Temp Min: 
22
Mount Eddy Temp Max: 
39
Mount Eddy Temp Avg: 
30
Mount Eddy Wind Cur: 
1.5
Mount Eddy Wind Max: 
3.5
Mount Eddy Snow Depth: 
40
Mount Eddy Snow New: 
0
Ash Creek Bowl Temp Cur: 
29.5
Ash Creek Bowl Temp Min: 
17.5
Ash Creek Bowl Temp Max: 
29.5
Ash Creek Bowl Temp Avg: 
23.5
Ash Creek Bowl Snow New: 
0
Ash Creek Ridge Temp Cur: 
28
Ash Creek Ridge Temp Min: 
17.5
Ash Creek Ridge Temp Max: 
30.5
Ash Creek Ridge Temp Avg: 
23.5
Ash Creek Ridge Wind Cur: 
15
Ash Creek Ridge Wind Max: 
15
Mt. Shasta City Temp Cur: 
26
Mt. Shasta City Temp Min: 
26
Mt. Shasta City Temp Max: 
34
Mt. Shasta City Temp Avg: 
29.5
Mt. Shasta City Wind Cur: 
0
Mt. Shasta City Wind Min: 
0
Mt. Shasta City Wind Max: 
6
Sand Flat Comments: 
State owned station, down
Grey Butte Wind Min: 
1.5
Mount Eddy Wind Min: 
0.5
Ash Creek Ridge Wind Min: 
0
Ski Bowl Snow Settlement: 
3.5
Castle Lake Snow Settlement: 
1.1
Mount Eddy Snow Settlement: 
3
Ash Creek Bowl Snow Settlement: 
2
Measured Precipitation Oct: 
12.11
Normal Precipitation Oct: 
9.3
Percent Precipitation Oct: 
130
Measured Precipitation MTD: 
2.81
Normal Precipitation MTD: 
3.67
Percent Precipitation MTD: 
77
Measured Precipitation YTD: 
28.06
Normal Precipitation YTD: 
34.68
Percent Precipitation YTD: 
81
Today SWE: 
0.00
Tonight SWE: 
0.00
Tomorrow SWE: 
0.00
Today Wind Max 7-9: 
10
Tonight Wind Max 7-9: 
10
Tomorrow Wind Max 7-9: 
10
Today Wind Min 7-9: 
0
Tonight Wind Min 7-9: 
0
Tomorrow Wind Min 7-9: 
0
Today Wind Max 9-11: 
25
Tonight Wind Max 9-11: 
45
Tomorrow Wind Max 9-11: 
45
Today Wind Min 9-11: 
15
Tonight Wind Min 9-11: 
35
Tomorrow Wind Min 9-11: 
35
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: 
37.79
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: 
Low
Current Time: 
4:00 AM