2005-2006 24-hour Snowfalls PRE-SEASON DAILY TOTALS (9300'; Mammoth Pass USBR site): NEW NEW SNOW DATE SNOW H2O DEPTH NOTES 10/25/2005 ? 0.2 ? RAIN; 9300'; Mammoth Pass USBR site 10/28/2005 0.24 0.44 ? RAIN, SNOW; Mammoth Pass USBR site 10/29/2005 0.36 0.04 ? Mammoth Pass USBR site 10/31/2005 0.12 0.08 ? RAIN, SNOW; Mammoth Pass USBR site 11/02/2005 tr tr 0 PRE-SEASON TOTALS: 0.72" snow 0.76" water --------------------------------------------------------------------------- 2005-2006 24-hour snowfall Sesame St. West Snow Study Site Mammoth Mountain, CA Observation time: approximately 8:00AM Snow depths rounded to the nearest inch (nearest 0.5" after 4/11/06) Water equivalence rounded to the nearest 0.1 inch (nearest 0.01" after 4/11/06) Corrected totals are adjusted for rounding errors NEW NEW SNOW DATE SNOW H2O DEPTH NOTES 11/03/2005 0 0 0 Site becomes operational 11/08/2005 8 1.8 7.5 Rain and snow 11/09/2005 3 0.4 9.3 11/26/2005 1 0.5 6 Rain and snow 11/29/2005 7 1.0 10 Rain and snow 11/30/2005 5 0.5 12 Rain and snow 12/01/2005 1 0.1 12 12/02/2005 27 5.0 42 Rain and snow 12/03/2005 1 0.2 39 12/08/2005 3 0.4 37 12/18/2005 11 1.4 45.1 12/19/2005 21 3.3 64 Warming trend during storm 12/20/2005 1 0.1 59 12/22/2005 4 0.7 59 Heavy rain and snow; rain to 11,000 ft. 12/23/2005 0 0.3 55 12/26/2005 10 1.4 62 Heavy snow 12/27/2005 1 0.5 63 Morning snow, afternoon rain 12/28/2005 0 0.9 59 Heavy rain 12/29/2005 8 1.2 66 12/31/2005 15 2.5 78 01/01/2006 4 1.3 87 01/02/2006 38 3.9 124 01/03/2006 32 2.4 131 01/12/2006 1 0.1 102 01/14/2006 5 0.5 105 01/15/2006 16 1.2 116 01/18/2006 7 1.0 116 01/19/2006 5 0.4 121 01/22/2006 1 0.1 114 01/27/2006 2 0.2 111 01/28/2006 tr tr 110 Rain previous night 01/29/2006 3 0.6 113 01/31/2006 3 0.4 113 02/16/2006 1 0.1 104 02/18/2006 18 1.1 118 02/19/2006 3 0.2 118 02/20/2006 1 0.1 117 02/27/2006 10 1.7 117 02/28/2006 15 3.3 127 03/03/2006 18 2.4 140 03/04/2006 9 0.6 148 03/06/2006 15 2.0 151 03/07/2006 10 1.5 154 03/08/2006 6 0.4 156 03/09/2006 2 0.2 153 03/10/2006 8 0.7 160 03/11/2006 1 0.1 157 03/12/2006 2 0.2 156 03/13/2006 4 0.4 159 03/14/2006 1 0.1 156 03/15/2006 16 1.1 165 03/17/2006 6 0.7 162 03/18/2006 4 0.3 162 03/19/2006 4 0.3 164 03/21/2006 13 1.3 172 03/25/2006 2 0.3 160 03/26/2006 9 1.2 166 03/28/2006 16 1.8 173 03/29/2006 16 1.7 188 03/31/2006 4 0.4 183 04/01/2006 9 1.0 189 04/03/2006 20 2.2 192 04/04/2006 38 4.5 240 04/05/2006 17 2.2 240 04/06/2006 4 0.1 215 04/10/2006 2 0.3 211 04/11/2006 1.0 0.20 210 Initiated USFS SWAG Guidelines 04/12/2006 6.5 0.75 214 04/13/2006 TR 0.02 208 04/14/2006 2.0 0.21 205 04/15/2006 1.0 0.37 205 04/17/2006 9.0 1.23 210 04/22/2006 5.5 0.60 200 04/23/2006 2.0 0.16 196 04/24/2006 1.0 0.19 195 CORRECTED TOTALS 572.0" 72.42"