Mammoth Mountain Ski Patrol 2014-15 Storm Summary - Sesame Snow Study Site 9,000' (2,743m)
Date	HN24(")	Base Depth	SWE	Rain	% Density	StormSnow "	Storm SWE "	Season Snow	Season SWE	Season Precip	Base Hi Temp	Base Lo Temp	Notes
9/27/2014	1.0	1.0	0.03		3						42	28
9/28/2014	0.5	1.5	0.05		10						36	27
9/29/2014	0.0	1.0		(Y).08		1.5	0.08	1.5	0.08	0.16	43	23	Rain during the day
SEP	1.5									0.16
11/1/2014	8.0	8.0	1.10		14						43	23	Perfect base density.  Making snow
11/2/2014	4.0	12.0	0.60		15	12.0	1.70	13.5	1.78	1.78	29	14	Ripping upslope winds followeed storm.  Starting zones on upper mtn are stripped by 11/4
11/13/2014	1.0	2.0	0.06	Y	6	1.0	0.06	14.5	1.84	2.15	44	29	Rain to at least top of Ch. 3 (.31") during the day.
11/21/2014	0.5	2.5	0.05		10	0.5	0.05			2.20	37	20
11/22/2014	0.0	2.5		(Y).26				15.0	1.89	2.46	38	22	All Rain  Grrrrrr
NOV	13.5									2.07
12/1/2014	1.5	2.5	0.30		20	1.5	0.30	16.5	2.19	2.76	31	25
12/2/2014	7.5	8.5	0.94		12.5						40	24	snow started @ 7am diminished @ 3:00
12/3/2014	3.0	11.0	0.48		16						32	29	Snow flurries throughout day. Southeren edge of north split flow.
12/4/2014	1.5	11.5	0.22		15						32	28	Scattered flurries day and evening
12/5/2014	0.5	11.0	0.09		18						32	28
12/6/2014	1.0	12.0	0.11		11	13.5	1.84	30.5	4.03	4.60	35	28	Overnight snow
12/12/2014	7.5	17.0	0.75		10						36	25
12/13/2014	3.5	18.5	0.45		12	11.0	1.20	41.5	5.23	5.80	24	14
12/16/2014	12.5	26.5	1.40		11								overnight surprise  more than forecasted
12/17/2014	1.0	26.0	0.08		8						24	19
12/18/2014	0.5	24.0	0.03		6	14.0	1.51	55.5	6.74	7.31	24	19
Date	HN24(")	Base Depth	SWE	Rain	% Density	StormSnow "	Storm SWE "	Season Snow	Season SWE	Season Precip	Base Hi Temp	Base Lo Temp	Notes
12/20/2014	0.5	24.0	0.05		10						30	23	winds - might not of collected all the H2O.  Never manually measured
12/21/2014	2.0	22.0	0.22		11	2.5	0.27	58.0	7.01	7.58	39	28
12/24/2014	0.5	20.0	0.04		8
12/25/2014	4.5	23.0	0.61		13	5.0	0.65	63.0	7.66	7.96	37	8	short period of heavy snowfall 2 inch/hour
12/30/2014	0.5	21.5	0.01		2	0.5	0.01	63.5	7.40	8.61	35	7
DEC	48.0									5.78
1/10/2015	0.5	20.0	0.01		2	0.5	0.01	64.0	7.41	8.62	39	32
1/27/2015	1.0	17.5	0.05		5						49	28
1/28/2015	1.0	18.0	0.07		7	2.0	0.12	66.0	7.53	8.74	30	17
JAN	2.5									0.13
Date	HN24(")	Base Depth	SWE	Rain	% Density	StormSnow "	Storm SWE "	Season Snow	Season SWE	Season Precip	Base Hi Temp	Base Lo Temp	Notes
2/7/2015	7.0	24.0	1.29	(Y).21	18						41	27	Snow overnight turned to rain/snow mix around 5am
2/8/2015	1.0	22.0	0.34	(Y).73	34	8.0	1.63	74.0	9.16	11.31	37	33	Rain snow mix to the top.
2/9/2015	4.0	25.0	0.93	(Y).97	23	4.0	0.93	78.0	10.09	13.21	38	25	Rain to the top rain snow mix overnight
2/22/2015	0.5	20.0	0.02		4						42	18
02/23/15	5.0	26.5	0.33		6						20	11
2/24/2015	0.5	25.5	0.01		2	6.0	0.36	84.0	10.45	13.57	21	12
2/28/2015	7.0	27.0	0.65		8	7.0	0.65	91.0	11.10	14.22	36	17
FEB	25.0									7.55
3/2/2015	3.0	30.0	0.31		10	3.0	0.31	94.0	11.41	14.53	24	16
3/12/2015	2.0	22.5	0.23		11	2.0	0.23	96.0	11.64	14.76	28	34
3/23/2015	2.0	9.0	0.44		22	2.0	0.44	98.0	12.08	15.20	38	26	Might have had some rain at the beginning of the storm.
MAR	7.0									0.98
4/7/2015	13.0	13.0	0.96		7						29	19	Started to snow around 9am. 2 inches/hr at some points.  Cleared and measured at 4:30pm
4/8/2015	8.0	21.0	0.65		8	21.0	1.61	119.0	13.69	16.81	20	14	Overnight snow. Cleared by morning.
4/25/2015	8.5	8.5	1.24	(Y).19	14	8.5	1.24	127.5	14.93	18.24	30	23	Rain snow mix on 4/24 till late evening and graupel evident to the top ch3. Lt snow showers during day.
APR	29.5									3.04
5/8/2015	12.0	12.0	1.05		9						35	20	snow started @ 1:45pm on 5/7
5/9/2015	2.5	14.5	0.35		14	14.5	1.40	142.0	16.33	19.64	23	20
5/15/2015	5.0	5.0	0.42		10	5.0	0.42	147.0	16.75	20.06	34	26	snow started @ 9:30 oon 5/14
Date	HN24(")	Base Depth	SWE	Rain	% Density	StormSnow "	Storm SWE "	Season Snow	Season SWE	Season Precip	Base Hi Temp	Base Lo Temp	Notes
5/21/2015	1.0	1.0	0.24	(Y) .14	10						42	29	After closing precip.  Rain Snow mix
5/22/2015	0.5	0.5	0.21	Y	42						42	30	Overnight precip with graupel.  Rain snow mix
5/23/2015	0.5	0.5	0.24	Y	48						38	32	Rain snow mix
5/24/2015	3.0	3.0	0.70	Y	23	5.0	1.39	152.0	18.14	21.59	40	32	Rain snow mix
MAY	24.5									1.53
Season total	151.5									21.59
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.