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 SUNDAY: DECEMBER 2 , 2018 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 4.3 4.1 105 6.3 6.2 102 Black Bear 8170 -M 9.2 * -M 10.9 * Blind Bull Sum 8650 5.0 5.3 94 5.3 5.9 90 Cottonwood Creek 7670 5.7 4.5 127 8.0 7.1 113 East Rim Divide 7930 2.2 2.0 110 3.6 3.5 103 Grand Targhee 9260 14.6 9.9 147 12.4 9.9 125 Granite Creek 6770 3.4 2.7 126 6.0 5.6 107 Grassy Lake 7265 7.0 6.6 106 10.3 10.2 101 Gros Ventre Summit 8750 2.4 3.8 63 3.1 4.2 74 Gunsight Pass 9820 2.8 3.3 85 5.2 4.2 124 Lewis Lake Divide 7850 6.0 7.5 80 9.8 10.2 96 Phillips Bench 8200 4.9 5.8 84 8.3 7.6 109 Salt River Summit 7640 2.6 2.1 124 4.8 4.5 107 Snake River Station 6920 4.1 3.4 121 8.4 6.8 124 Spring Creek Divide 9000 5.8 5.3 109 7.3 6.7 109 Thumb Divide 7980 2.2 3.3 67 4.7 5.5 85 Togwotee Pass 9580 7.3 7.4 99 8.3 7.4 112 Two Ocean Plateau 9240 8.5 8.7 98 7.5 8.3 90 Willow Creek 8080 6.5 5.9 110 10.8 9.9 109 Younts Peak 8350 -M 4.4 * -M 5.1 * ----- ----- Basin Index (%) 104 105 MADISON-GALLATIN Black Bear 8170 -M 9.2 * -M 10.9 * Canyon 7870 2.6 3.1 84 4.3 4.9 88 Madison Plateau 7750 3.8 5.3 72 5.9 7.5 79 West Yellowstone 6700 2.1 2.0 105 3.7 4.3 86 Whiskey Creek 6800 1.9 3.3 58 2.6 6.0 43 ----- ----- Basin Index (%) 76 73 YELLOWSTONE Beartooth Lake 9360 5.3 6.2 85 4.4 5.7 77 Burnt Mtn 5880 2.1 1.3 162 5.4 5.2 104 Canyon 7870 2.6 3.1 84 4.3 4.9 88 Cole Creek 7850 6.1 4.2 145 6.2 5.0 124 Evening Star 9200 8.3 7.3 114 10.9 8.6 127 Fisher Creek 9100 6.8 8.9 76 10.0 9.4 106 Northeast Entrance 7350 2.8 1.7 165 5.3 4.2 126 Parker Peak 9400 7.7 6.3 122 8.8 5.8 152 Sylvan Lake 8420 7.1 5.3 134 11.4 7.4 154 Thumb Divide 7980 2.2 3.3 67 4.7 5.5 85 Two Ocean Plateau 9240 8.5 8.7 98 7.5 8.3 90 White Mill 8700 5.4 6.2 87 5.1 7.3 70 Wolverine 7650 2.6 2.1 124 4.6 4.2 110 ----- ----- Basin Index (%) 104 109 WIND RIVER Burroughs Creek 8750 2.3 -M * 3.4 -M * Castle Creek 8400 .9 -M * 2.2 -M * Cold Springs 9630 2.0 2.5 80 2.1 3.7 57 Deer Park 9700 4.3 4.2 102 4.5 5.7 79 Hobbs Park 10100 3.6 4.6 78 2.9 4.5 64 Kirwin 9550 2.4 3.5 69 2.2 4.0 55 Little Warm 9370 1.7 2.9 59 2.2 4.3 51 Owl Creek 8975 2.3 1.6 144 2.9 2.2 132 South Pass 9040 3.3 4.0 82 3.9 5.4 72 St. Lawrence Alt 8620 1.2 2.1 57 3.2 3.3 97 Togwotee Pass 9580 7.3 7.4 99 8.3 7.4 112 Townsend Creek 8700 2.9 2.5 116 3.9 4.4 89 ----- ----- Basin Index (%) 88 80 BIGHORN BASIN Bald Mtn. 9380 7.4 5.9 125 4.1 5.3 77 Bear Trap Meadow 8200 3.1 1.5 207 3.3 3.2 103 Bone Springs Div 9350 5.5 5.1 108 4.8 5.0 96 Grave Springs 8550 2.8 1.9 147 3.6 3.8 95 Kirwin 9550 2.4 3.5 69 2.2 4.0 55 Marquette 8760 3.0 -M * 4.0 -M * Middle Powder 7760 3.3 3.1 106 2.9 4.5 64 Owl Creek 8975 2.3 1.6 144 2.9 2.2 132 Powder River Pass 9480 3.8 3.0 127 3.4 4.2 81 Shell Creek 9580 -M 5.1 * -M 4.7 * Timber Creek 7950 1.3 1.7 76 3.0 3.3 91 ----- ----- Basin Index (%) 117 85 SHOSHONE RIVER Blackwater 9780 8.6 7.2 119 8.9 6.7 133 Evening Star 9200 8.3 7.3 114 10.9 8.6 127 Marquette 8760 3.0 -M * 4.0 -M * Sylvan Road 7120 4.0 2.9 138 6.4 6.1 105 Younts Peak 8350 -M 4.4 * -M 5.1 * ----- ----- Basin Index (%) 120 122 POWDER RIVER Bear Trap Meadow 8200 3.1 1.5 207 3.3 3.2 103 Cloud Peak Reservoir 9860 5.3 3.9 136 5.1 4.8 106 Grave Springs 8550 2.8 1.9 147 3.6 3.8 95 Hansen Sawmill 8360 1.9 1.7 112 3.5 3.1 113 Middle Powder 7760 3.3 3.1 106 2.9 4.5 64 Powder River Pass 9480 3.8 3.0 127 3.4 4.2 81 Soldier Park 8720 1.6 -M * 3.4 -M * ----- ----- Basin Index (%) 134 92 TONGUE RIVER Big Goose 7990 2.3 2.5 92 4.5 4.1 110 Bone Springs Div 9350 5.5 5.1 108 4.8 5.0 96 Burgess Junction 7880 2.8 3.2 88 3.7 4.2 88 Dome Lake 8880 2.7 3.8 71 3.6 5.0 72 Little Goose 8870 3.7 -M * 3.6 -M * Sucker Creek 8880 4.6 3.3 139 4.3 4.8 90 Tie Creek 6870 1.5 .8 188 5.1 4.2 121 ----- ----- Basin Index (%) 104 95 BELLE FOURCHE Cole Canyon 5910 1.6 .8 200 4.0 3.6 111 ----- ----- Basin Index (%) 200 111 CHEYENNE RIVER BASIN Blind Park 6890 2.4 1.8 133 2.7 4.4 61 North Rapid Creek 6130 1.7 1.5 113 2.5 3.7 68 ----- ----- Basin Index (%) 124 64 UPPER N. PLATTE Arapaho Ridge 10960 8.0 5.8 138 9.4 7.0 134 Blackhall Mtn 9820 8.8 -M * 12.0 -M * Columbine 9160 6.3 4.7 134 8.6 7.2 119 Divide Peak 8880 5.0 4.7 106 7.8 6.9 113 Joe Wright 10120 6.2 6.1 102 11.5 8.3 139 Laprele Creek 8375 4.0 2.3 174 5.1 4.1 124 Med Bow 10500 13.0 -M * 14.0 -M * North French Creek 10130 10.3 7.2 143 12.1 7.9 153 Never Summer 10280 6.9 5.1 135 7.6 -M * Old Battle 10000 10.5 8.0 131 12.8 10.2 125 Rawah 9020 3.0 2.6 115 5.8 5.0 116 Sage Creek Basin 7850 3.5 2.3 152 6.0 4.7 128 Sand Lake 10050 9.0 7.4 122 8.1 7.5 108 South Brush Creek 8440 3.5 2.9 121 4.5 5.0 90 Tower 10500 13.6 11.7 116 13.0 11.8 110 Webber Springs 9250 6.6 5.1 129 -M 7.8 * Willow Creek Pass 9540 5.0 3.7 135 6.7 4.6 146 Zirkel 9340 7.9 4.8 165 12.3 8.5 145 ----- ----- Basin Index (%) 130 125 SWEETWATER Deer Park 9700 4.3 4.2 102 4.5 5.7 79 Larsen Creek 9000 1.9 2.6 73 4.8 -M * South Pass 9040 3.3 4.0 82 3.9 5.4 72 ----- ----- Basin Index (%) 88 76 LOWER N. PLATTE Casper Mtn. 7900 4.0 3.6 111 4.0 5.5 73 Laprele Creek 8375 4.0 2.3 174 5.1 4.1 124 Reno Hill 8400 4.4 3.7 119 4.8 5.0 96 Windy Peak 7900 3.3 1.8 183 3.5 3.6 97 ----- ----- Basin Index (%) 138 96 LARAMIE RIVER Brooklyn Lake 10240 7.5 4.3 174 9.2 5.9 156 Cinnabar Park 9574 7.6 5.5 138 9.8 6.9 142 Crow Creek 8330 1.3 2.0 65 3.8 3.7 103 Deadman Hill 10220 6.0 4.9 122 6.3 5.4 117 Rawah 9020 3.0 2.6 115 5.8 5.0 116 Roach 9700 4.7 4.1 115 6.6 5.8 114 ----- ----- Basin Index (%) 129 127 S. PLATTE Black Mountain 8920 2.6 -M * 3.9 -M * Crow Creek 8330 1.3 2.0 65 3.8 3.7 103 Deadman Hill 10220 6.0 4.9 122 6.3 5.4 117 ----- ----- Basin Index (%) 106 111 LITTLE SNAKE RIVER Battle Mountain 7440 3.7 1.6 231 3.6 4.7 77 Divide Peak 8880 5.0 4.7 106 7.8 6.9 113 Elk River 8700 4.5 3.1 145 5.2 5.8 90 Little Snake River 8915 7.2 3.9 185 14.1 9.1 155 Old Battle 10000 10.5 8.0 131 12.8 10.2 125 Sage Creek Basin 7850 3.5 2.3 152 6.0 4.7 128 Sandstone RS 8150 5.0 2.2 227 6.3 5.5 115 Whiskey Park 8950 7.6 4.9 155 11.3 7.6 149 ----- ----- Basin Index (%) 153 123 UPPER GREEN RIVER Big Sandy Opening 9080 3.3 3.7 89 4.6 4.1 112 Blind Bull Sum 8650 5.0 5.3 94 5.3 5.9 90 East Rim Divide 7930 2.2 2.0 110 3.6 3.5 103 Elkhart Park G.S. 9400 3.4 3.4 100 4.7 4.2 112 Gros Ventre Summit 8750 2.4 3.8 63 3.1 4.2 74 Gunsight Pass 9820 2.8 3.3 85 5.2 4.2 124 Kendall R.S. 7740 2.3 2.6 88 3.6 4.1 88 Loomis Park 8240 3.9 3.2 122 5.5 4.9 112 New Fork Lake 8340 2.3 2.4 96 3.0 3.4 88 Pocket Creek 9360 5.1 -M * 5.9 -M * Snyder Basin 8060 2.9 2.9 100 4.8 4.0 120 Spring Creek Divide 9000 5.8 5.3 109 7.3 6.7 109 Triple Peak 8500 6.3 5.1 124 8.4 6.9 122 ----- ----- Basin Index (%) 99 105 LOWER GREEN RIVER Blacks Fork Jct 8869 1.6 -M * 4.6 -M * Buck Pasture 9632 4.3 -M * 7.6 -M * EF Blacks Fork GS 9360 2.9 -M * 4.5 -M * Hams Fork 7840 2.5 2.3 109 4.2 3.4 124 Hewinta 9500 2.2 2.0 110 5.2 4.6 113 Hickerson Park 9122 2.1 1.6 131 4.6 3.8 121 Hole-in-Rock 9168 1.3 1.7 76 4.3 3.6 119 Indian Creek 9425 4.8 5.9 81 4.8 6.1 79 Kelley R.S. 8180 3.6 3.1 116 4.7 5.2 90 Spirit Lk 10235 4.1 -M * 6.6 -M * Steel Creek Park 10158 4.2 4.0 105 6.2 5.3 117 ----- ----- Basin Index (%) 100 106 UPPER BEAR RIVER Bear River RS 8777 2.2 -M * 5.3 -M * Bug Lake 7987 3.4 3.6 94 7.6 5.6 136 Burts Miller Ranch 8000 2.7 -M * 2.9 -M * Chalk Creek #1 9171 4.5 5.4 83 9.8 7.7 127 Hayden Fork 9130 3.5 3.1 113 7.9 6.4 123 Kelley R.S. 8180 3.6 3.1 116 4.7 5.2 90 Lily Lake 9133 3.1 2.9 107 6.1 5.6 109 Monte Cristo 8932 5.6 5.8 97 8.1 7.4 109 Salt River Summit 7640 2.6 2.1 124 4.8 4.5 107 ----- ----- Basin Index (%) 101 116 ----------------------------------------------------------------------------- -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.