Mammoth Mountain Ski Patrol 2021-22 Storm Summary - Sesame Snow Study Site 9,000' (2,743m)
Date	Base Depth	HN24(")	SWE	Rain	% Density	StormSnow "	Storm SWE "	Season Snow	Season SWE	Season Precip	Base Hi Temp	Base Lo Temp	Notes
10/08/21	1.0	1.0	0.20	M	20						48	32	SWE  Met #'s in column. Pluvio .20
10/9/2021	7.0	7.0	0.74		11	8.0	0.74	8.0	0.94		32	29	SWE Met #'s in column. Pluvio .64
10/12/2021	6.0	5.0	0.39		8	5.0	0.39	13.0	1.33		29	14	SWE Met #'s in column. Pluvio .30
10/18/2021	5.0	4.5	0.51		11	4.5	0.51	17.5	1.84		43	19	SWE Met #'s in column. Pluvio .41
10/24/2021	0.0	0.0	0.03	Y						1.87	37	33	SWE Met #'s in column. Pluvio .02
10/25/2021	1.0	1.0	7.24	Y						9.11	39	33	SWE Met #'s in column. Pluvio 6.06.  Started to snow around 5am at main lodge.  Some slush around garage elevation
10/26/2021	16.0	13.5	2.25		17	14.5	2.25	32.0	4.09	13.20	33	19	Pluvio 1.76"  All snow during day on 10/25  Clearing around 3pm
Oct Total		32.0	4.09
11/9/2021	11.5	6.5	0.80	M	12						42	25	.07 rain from difference in manual SWE from Met.
11/10/2021	12.0	1.5	0.45	M	30	8.0	1.25	40.0	5.34		38	28	.37" of rain from difference in manual SWE from Met
Nov Total		8.0	1.25
12/7/2021	4.5	T	0.02								49	30	Trace of snow at Sesame up to .5 at Summit
12/8/2021	4.5	T	0.01			T	0.03	40.0	5.37		40	30	Met One recorded .01 H2o
12/9/2021	9.0	3.5	0.56		16						37	24	6am numbers precip from Met   Snowing 1"/hr  Strong SW winds at summit G90's
12/10/2021	14.0	7.5	0.64		9	11.0	1.20	51.0	6.57		24	8	Lt winds low density snow.  Good skiing
Date	Base Depth	HN24(")	SWE	Rain	% Density	StormSnow "	Storm SWE "	Season Snow	Season SWE	Season Precip	Base Hi Temp	Base Lo Temp	Notes
12/13/2021	17.0	5.0	0.77		14						33	22
12/14/2021	44.0	28.0	5.10		18						25	21	Large avalanches on Lincoln and Upper Mtn.  Up to 8' crowns running in old snow
12/15/2021	51.5	10.5	1.10		13	43.5	6.97	94.5	13.54		23	7
12/16/2021	56.0	9.5	1.20		13						23	8
12/17/2021	54.5	5.0	0.90		18	14.5	2.10	109.0	15.64		12	10
1222/2021	47.0	T	0.03								40	25	Snain at Canyon lodge this morning
12/23/2021	64.0	18.0	2.70										Strong winds brought down tree tops, poor visibility, dense snow, diffcult travel
12/242021	77.0	12.0	3.40
12/25/2021	81.0	10.0	1.60			40.0	7.73	149.0	23.37		25	18
12/26/2021	96.0	18.0	2.00								19	11	large crowns visible in Noids/Scotty Monument. To the ground with toe close to ch 11
12/27/2021	101.0	11.0	0.36								11	8	intense wind loading.
12/28/2021	107.0	13.0	1.00			42.0	3.36	191.0	26.73		16	11
Date	Base Depth	HN24(")	SWE	Rain	% Density	StormSnow "	Storm SWE "	Season Snow	Season SWE	Season Precip	Base Hi Temp	Base Lo Temp	Notes
12/.29/2021	102.5	1.0	0.05								19	13	Snow started @ 5am. Light to Moderate winds
12/30/2021	107.0	11.0	0.85			12.0	0.90	203.0	27.63		20	14	Great skiing firm bed surface
DEC Total		152.0
Date	Base Depth	HN24(")	SWE	Rain	% Density	StormSnow "	Storm SWE "	Season Snow	Season SWE	Season Precip	Base Hi Temp	Base Lo Temp	Notes
Units for Base Depth, New Snow, Storm Total, and Season Snowfall are in inches.
SWE≡Snow Water Equivalent, the amount of water produced from melting a known volume of snow.  Measured in inches of H2O.
Season Precip includes SWE and rain since October 1st.
Units for 24 Hour Base Hi Temp and Base Lo Temp are degrees Fahrenheit.
Line breaks indicate clearing between storms, despite occasional consecutive days.
All data subject to revision.
Season Precip is from Met One sensor unless otherwise noted