Supercell over Laramie
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Wyoming Snow Precipitation Update

United States Natural Resources Water and Climate Center Department of Conservation Portland, Oregon Agriculture Service S N O W - P R E C I P I T A T I O N U P D A T E Based on Mountain Data from NRCS SNOTEL Sites As of MONDAY: DECEMBER 22 , 2014 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 7.4 6.0 123 8.3 8.7 95 Black Bear 8170 13.1 14.7 89 14.5 15.6 93 Blind Bull Sum 8650 12.5 7.9 158 9.1 8.1 112 Cottonwood Creek 7670 10.5 7.2 146 12.8 9.7 132 East Rim Divide 7930 6.1 3.6 169 5.8 4.8 121 Grand Targhee 9260 17.4 14.8 118 15.1 13.0 116 Granite Creek 6770 9.4 4.9 192 10.0 8.0 125 Grassy Lake 7265 12.5 10.4 120 13.5 14.4 94 Gros Ventre Summit 8750 7.4 5.0 148 5.6 5.4 104 Gunsight Pass 9820 6.4 4.5 142 6.6 5.5 120 Lewis Lake Divide 7850 11.8 10.7 110 14.1 14.5 97 Phillips Bench 8200 11.0 8.9 124 12.4 10.9 114 Salt River Summit 7760 5.2 3.9 133 6.9 6.5 106 Snake River Station 6920 8.1 5.3 153 9.9 9.5 104 Spring Creek Divide 9000 12.6 8.2 154 12.6 9.4 134 Thumb Divide 7980 5.1 5.2 98 6.3 7.6 83 Togwotee Pass 9580 10.8 9.7 111 11.8 10.1 117 Two Ocean Plateau 9240 13.0 10.9 119 11.6 11.2 104 Willow Creek 8380 10.9 9.2 118 13.9 13.6 102 Younts Peak 8350 -M 5.9 * -M 6.7 * ----- ----- Basin Index (%) 127 108 MADISON-GALLATIN Black Bear 8170 13.1 14.7 89 14.5 15.6 93 Canyon 7870 5.1 4.5 113 5.8 6.8 85 Madison Plateau 7750 8.2 8.9 92 9.0 10.6 85 West Yellowstone 6700 3.7 3.8 97 5.0 6.0 83 Whiskey Creek 6800 5.2 5.6 93 6.7 8.5 79 ----- ----- Basin Index (%) 94 86 YELLOWSTONE Beartooth Lake 9360 10.7 8.7 123 10.2 8.0 128 Burnt Mtn 5880 2.4 1.8 133 5.0 6.2 81 Canyon 7870 5.1 4.5 113 5.8 6.8 85 Cole Creek 7850 4.1 5.7 72 3.7 6.0 62 Evening Star 9200 12.0 9.6 125 12.9 11.6 111 Fisher Creek 9100 14.2 13.1 108 13.1 13.1 100 Northeast Entrance 7350 4.9 2.9 169 7.3 5.5 133 Parker Peak 9400 10.3 8.5 121 9.7 7.6 128 Sylvan Lake 8420 6.9 8.0 86 9.1 9.9 92 Thumb Divide 7980 5.1 5.2 98 6.3 7.6 83 Two Ocean Plateau 9240 13.0 10.9 119 11.6 11.2 104 White Mill 8700 11.6 8.7 133 11.2 9.9 113 Wolverine 7650 6.3 3.9 162 6.8 5.6 121 ----- ----- Basin Index (%) 117 103 WIND RIVER Burroughs Creek 8750 6.9 5.3 130 8.0 6.8 118 Castle Creek 8400 4.6 -M * 4.8 -M * Cold Springs 9630 3.4 2.9 117 4.0 4.5 89 Deer Park 9700 4.8 5.2 92 6.6 7.6 87 Hobbs Park 10100 4.2 6.0 70 5.1 5.6 91 Kirwin 9550 5.7 4.1 139 6.8 5.0 136 Little Warm 9370 4.7 3.9 121 5.5 5.5 100 Owl Creek 8975 2.1 2.3 91 4.0 2.6 154 South Pass 9040 4.7 5.6 84 5.0 7.4 68 St. Lawrence Alt 8620 1.4 2.6 54 2.6 4.0 65 Togwotee Pass 9580 10.8 9.7 111 11.8 10.1 117 Townsend Creek 8700 2.2 3.4 65 4.3 5.3 81 ----- ----- Basin Index (%) 100 99 BIGHORN BASIN Bald Mtn. 9380 5.8 7.3 79 5.5 7.0 79 Bear Trap Meadow 8200 2.8 2.3 122 3.1 3.9 79 Bone Springs Div 9350 5.0 6.6 76 4.8 6.4 75 Grave Springs 8550 2.4 2.8 86 2.2 4.6 48 Kirwin 9550 5.7 4.1 139 6.8 5.0 136 Marquette 8760 1.8 -M * 3.3 -M * Middle Powder 7760 3.9 4.3 91 3.6 5.6 64 Owl Creek 8975 2.1 2.3 91 4.0 2.6 154 Powder River Pass 9480 4.8 4.0 120 5.6 5.3 106 Shell Creek 9580 4.6 6.5 71 4.7 5.9 80 Timber Creek 7950 2.4 1.9 126 3.9 3.7 105 ----- ----- Basin Index (%) 94 88 SHOSHONE RIVER Blackwater 9780 10.2 9.3 110 9.5 9.0 106 Evening Star 9200 12.0 9.6 125 12.9 11.6 111 Marquette 8760 1.8 -M * 3.3 -M * Sylvan Road 7120 5.7 4.5 127 8.0 8.1 99 Younts Peak 8350 -M 5.9 * -M 6.7 * ----- ----- Basin Index (%) 119 106 POWDER RIVER Bear Trap Meadow 8200 2.8 2.3 122 3.1 3.9 79 Cloud Peak Reservoir 9860 5.0 5.3 94 5.7 5.8 98 Grave Springs 8550 2.4 2.8 86 2.2 4.6 48 Hansen Sawmill 8360 3.2 2.6 123 4.1 3.7 111 Middle Powder 7760 3.9 4.3 91 3.6 5.6 64 Powder River Pass 9480 4.8 4.0 120 5.6 5.3 106 Soldier Park 8720 2.2 -M * 3.6 -M * ----- ----- Basin Index (%) 104 84 TONGUE RIVER Big Goose 7990 3.0 3.2 94 3.7 4.9 76 Bone Springs Div 9350 5.0 6.6 76 4.8 6.4 75 Burgess Junction 7880 3.6 4.1 88 3.9 5.4 72 Dome Lake 8880 2.3 4.7 49 4.2 6.2 68 Little Goose 8870 3.1 -M * 4.5 -M * Sucker Creek 8880 3.9 4.4 89 4.7 6.1 77 Tie Creek 6870 1.7 1.4 121 3.9 5.1 76 ----- ----- Basin Index (%) 80 74 BELLE FOURCHE Cole Canyon 5910 1.0 1.1 91 3.5 4.2 83 ----- ----- Basin Index (%) 91 83 CHEYENNE RIVER BASIN Blind Park 6890 2.3 2.4 96 3.9 5.3 74 North Rapid Creek 6130 2.4 2.5 96 4.3 4.5 96 ----- ----- Basin Index (%) 96 84 UPPER N. PLATTE Arapaho Ridge 10960 7.3 8.3 88 8.7 9.7 90 Blackhall Mtn 9820 9.3 -M * 12.1 -M * Columbine 9160 8.4 7.7 109 10.5 10.2 103 Divide Peak 8880 3.9 7.1 55 6.1 9.2 66 Joe Wright 10120 7.0 8.6 81 12.4 10.9 114 Laprele Creek 8375 2.0 3.3 61 2.6 5.3 49 Med Bow 10500 12.6 -M * 13.1 -M * North French Creek 10130 9.8 10.3 95 10.4 10.7 97 Never Summer 10280 7.1 7.5 95 7.9 -M * Old Battle 10000 9.7 11.2 87 10.7 14.4 74 Rawah 9020 4.9 3.8 129 7.8 6.7 116 Sage Creek Basin 7850 2.5 4.7 53 3.6 6.3 57 Sand Lake 10050 9.7 10.0 97 8.8 10.0 88 South Brush Creek 8440 3.3 4.2 79 4.4 6.5 68 Tower 10500 14.4 17.7 81 16.3 16.4 99 Webber Springs 9250 6.9 8.4 82 8.4 11.0 76 Willow Creek Pass 9540 4.0 4.9 82 5.9 5.8 102 Zirkel 9340 -M 8.1 * -M 12.0 * ----- ----- Basin Index (%) 86 88 SWEETWATER Deer Park 9700 4.8 5.2 92 6.6 7.6 87 Larsen Creek 9000 3.5 4.1 85 5.4 -M * South Pass 9040 4.7 5.6 84 5.0 7.4 68 ----- ----- Basin Index (%) 87 77 LOWER N. PLATTE Casper Mtn. 7900 2.6 5.2 50 3.4 6.8 50 Laprele Creek 8375 2.0 3.3 61 2.6 5.3 49 Reno Hill 8400 3.2 5.2 62 4.6 6.4 72 Windy Peak 7900 1.9 2.8 68 2.1 4.7 45 ----- ----- Basin Index (%) 59 55 LARAMIE RIVER Brooklyn Lake 10240 7.8 7.1 110 8.6 8.2 105 Cinnabar Park 9574 7.1 7.6 93 9.2 10.0 92 Crow Creek 8330 1.7 3.9 44 3.6 4.9 73 Deadman Hill 10220 6.2 6.4 97 7.0 7.0 100 Rawah 9020 4.9 3.8 129 7.8 6.7 116 Roach 9700 3.9 5.9 66 6.4 7.9 81 ----- ----- Basin Index (%) 91 95 S. PLATTE Black Mountain 8920 3.6 -M * 5.4 -M * Crow Creek 8330 1.7 3.9 44 3.6 4.9 73 Deadman Hill 10220 6.2 6.4 97 7.0 7.0 100 ----- ----- Basin Index (%) 77 89 LITTLE SNAKE RIVER Battle Mountain 7440 3.4 3.2 106 5.4 6.3 86 Divide Peak 8880 3.9 7.1 55 6.1 9.2 66 Elk River 8700 5.9 5.6 105 7.0 8.0 88 Little Snake River 8915 9.7 7.0 139 13.6 12.9 105 Old Battle 10000 9.7 11.2 87 10.7 14.4 74 Sage Creek Basin 7850 2.5 4.7 53 3.6 6.3 57 Sandstone RS 8150 4.1 3.9 105 4.6 7.6 61 Whiskey Park 8950 10.3 8.2 126 11.4 10.6 108 ----- ----- Basin Index (%) 97 83 UPPER GREEN RIVER Big Sandy Opening 9080 5.5 4.8 115 5.2 5.5 95 Blind Bull Sum 8650 12.5 7.9 158 9.1 8.1 112 East Rim Divide 7930 6.1 3.6 169 5.8 4.8 121 Elkhart Park G.S. 9400 5.4 4.6 117 6.4 5.6 114 Gros Ventre Summit 8750 7.4 5.0 148 5.6 5.4 104 Gunsight Pass 9820 6.4 4.5 142 6.6 5.5 120 Kendall R.S. 7740 6.4 4.1 156 6.5 5.6 116 Loomis Park 8240 8.3 5.2 160 8.5 6.9 123 New Fork Lake 8340 5.9 3.7 159 5.6 4.5 124 Pocket Creek 9360 5.1 -M * 3.8 -M * Snider Basin 8060 6.9 4.4 157 8.1 5.7 142 Spring Creek Divide 9000 12.6 8.2 154 12.6 9.4 134 Triple Peak 8500 13.3 7.3 182 14.3 9.6 149 ----- ----- Basin Index (%) 153 123 LOWER GREEN RIVER Blacks Fork Jct 8870 2.5 -M * 4.2 -M * Buck Pasture 9700 4.8 -M * 6.1 -M * EF Blacks Fork GS 9360 3.2 -M * 4.5 -M * Hams Fork 7840 5.3 3.7 143 4.9 4.5 109 Hewinta 9519 2.8 3.2 88 4.7 5.9 80 Hickerson Park 9145 3.1 2.2 141 3.8 4.6 83 Hole-in-Rock 9150 2.0 2.5 80 3.1 4.2 74 Indian Creek 9425 8.9 8.9 100 9.6 8.6 112 Kelley R.S. 8180 6.5 5.1 127 7.2 7.3 99 Spirit Lk 10235 3.3 -M * 4.9 -M * Steel Creek Park 10200 4.2 5.7 74 5.5 6.8 81 ----- ----- Basin Index (%) 105 93 UPPER BEAR RIVER Bear River RS 8777 2.5 -M * 3.4 -M * Bug Lake 7950 6.2 5.5 113 6.0 7.9 76 Burts Miller Ranch 8000 2.0 -M * 1.6 -M * Chalk Creek #1 8993 6.0 9.1 66 6.3 10.3 61 Hayden Fork 9212 4.0 4.6 87 6.7 8.4 80 Kelley R.S. 8180 6.5 5.1 127 7.2 7.3 99 Lily Lake 9156 3.6 4.6 78 4.5 7.3 62 Monte Cristo 8960 8.5 8.8 97 8.1 10.2 79 Salt River Summit 7760 5.2 3.9 133 6.9 6.5 106 ----- ----- Basin Index (%) 96 79 ----------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. Units = inches for the Current and Normal Snow Water Equivalent and Total Precipitation values If the Basin Index (%) value is flagged as potentially invalid, care should be taken to evaluate if the value is representative of conditions in the basin. The SNOW WATER EQUIVALENT Percent of Median represents the snow water equivalent found at selected SNOTEL sites in or near the basin compared to the Median value for those sites on this day. The TOTAL PRECIPITATION Percent of Average represents the total precipitation (beginning October 1st) found at selected SNOTEL sites in or near the basin compared to the Average value for those sites on this day. Contact your state water supply staff for assistance. Medians and averages are calculated for the period 1981-2010. Provisional data, subject to revision. * Site -- Either: (a) the current value is missing; (b) the median or average for the day is not available or is zero; or (c) for snow water equivalent, the median for the day is less than 10% of the maximum median value for the year. * Basin - More than half of the sites within the basin are flagged with *, preventing the calculation of a meaningful basin index. The basin index is calculated as the sum of the valid current values divided by the sum of the corresponding medians (for snow water equivalent) or averages (for precipitation) and the resulting fraction multiplied by 100. ---------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. Units = inches for the Current and Normal Snow Water Equivalent and Total Precipitation values If the Basin Index (%) value is flagged as potentially invalid, care should be taken to evaluate if the value is representative of conditions in the basin. The SNOW WATER EQUIVALENT Percent of Median represents the snow water equivalent found at selected SNOTEL sites in or near the basin compared to the Median value for those sites on this day. The TOTAL PRECIPITATION Percent of Average represents the total precipitation (beginning October 1st) found at selected SNOTEL sites in or near the basin compared to the Average value for those sites on this day. Contact your state water supply staff for assistance. Medians and averages are calculated for the period 1981-2010. Provisional data, subject to revision. * Site -- Either: (a) the current value is missing; (b) the median or average for the day is not available or is zero; or (c) for snow water equivalent, the median for the day is less than 10% of the maximum median value for the year. * Basin - More than half of the sites within the basin are flagged with *, preventing the calculation of a meaningful basin index. The basin index is calculated as the sum of the valid current values divided by the sum of the corresponding medians (for snow water equivalent) or averages (for precipitation) and the resulting fraction multiplied by 100.