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 SATURDAY: DECEMBER 2 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 6.3 4.1 154 8.2 6.2 132 Black Bear 8170 12.6 9.2 137 12.2 10.9 112 Blind Bull Sum 8650 11.1 5.3 209 7.1 5.9 120 Cottonwood Creek 7670 4.7 4.5 104 6.5 7.1 92 East Rim Divide 7930 3.1 2.0 155 4.0 3.5 114 Grand Targhee 9260 19.8 9.9 200 12.0 9.9 121 Granite Creek 6770 4.6 2.7 170 7.8 5.6 139 Grassy Lake 7265 7.6 6.6 115 11.0 10.2 108 Gros Ventre Summit 8750 6.6 3.8 174 6.2 4.2 148 Gunsight Pass 9820 5.6 3.3 170 6.2 4.2 148 Lewis Lake Divide 7850 10.0 7.5 133 12.6 10.2 124 Phillips Bench 8200 7.0 5.8 121 9.0 7.6 118 Salt River Summit 7760 1.6 2.1 76 3.7 4.5 82 Snake River Station 6920 4.0 3.4 118 8.2 6.8 121 Spring Creek Divide 9000 7.0 5.3 132 7.5 6.7 112 Thumb Divide 7980 6.5 3.3 197 7.7 5.5 140 Togwotee Pass 9580 12.3 7.4 166 11.9 7.4 161 Two Ocean Plateau 9240 16.3 8.7 187 11.1 8.3 134 Willow Creek 8380 8.2 5.9 139 11.4 9.9 115 Younts Peak 8350 -M 4.4 * -M 5.1 * ----- ----- Basin Index (%) 154 122 MADISON-GALLATIN Black Bear 8170 12.6 9.2 137 12.2 10.9 112 Canyon 7870 4.3 3.1 139 5.6 4.9 114 Madison Plateau 7750 7.5 5.3 142 8.5 7.5 113 West Yellowstone 6700 2.6 2.0 130 5.5 4.3 128 Whiskey Creek 6800 3.8 3.3 115 5.0 6.0 83 ----- ----- Basin Index (%) 134 110 YELLOWSTONE Beartooth Lake 9360 12.5 6.2 202 10.7 5.7 188 Burnt Mtn 5880 .2 1.3 15 5.3 5.2 102 Canyon 7870 4.3 3.1 139 5.6 4.9 114 Cole Creek 7850 4.5 4.2 107 3.6 5.0 72 Evening Star 9200 13.6 7.3 186 14.2 8.6 165 Fisher Creek 9100 16.4 8.9 184 13.8 9.4 147 Northeast Entrance 7350 2.1 1.7 124 5.7 4.2 136 Parker Peak 9400 12.4 6.3 197 10.1 5.8 174 Sylvan Lake 8420 9.0 5.3 170 9.6 7.4 130 Thumb Divide 7980 6.5 3.3 197 7.7 5.5 140 Two Ocean Plateau 9240 16.3 8.7 187 11.1 8.3 134 White Mill 8700 13.4 6.2 216 8.8 7.3 121 Wolverine 7650 3.2 2.1 152 6.7 4.2 160 ----- ----- Basin Index (%) 177 139 WIND RIVER Burroughs Creek 8750 5.2 -M * 6.2 -M * Castle Creek 8400 2.5 -M * 4.0 -M * Cold Springs 9630 3.1 2.5 124 3.6 3.7 97 Deer Park 9700 5.2 4.2 124 5.9 5.7 104 Hobbs Park 10100 7.8 4.6 170 6.3 4.5 140 Kirwin 9550 7.8 3.5 223 6.4 4.0 160 Little Warm 9370 7.2 2.9 248 6.8 4.3 158 Owl Creek 8975 1.3 1.6 81 3.0 2.2 136 South Pass 9040 4.3 4.0 108 3.6 5.4 67 St. Lawrence Alt 8620 1.7 2.1 81 3.9 3.3 118 Togwotee Pass 9580 12.3 7.4 166 11.9 7.4 161 Townsend Creek 8700 2.7 2.5 108 4.1 4.4 93 ----- ----- Basin Index (%) 151 124 BIGHORN BASIN Bald Mtn. 9380 6.5 5.9 110 4.1 5.3 77 Bear Trap Meadow 8200 2.5 1.5 167 3.8 3.2 119 Bone Springs Div 9350 4.7 5.1 92 3.9 5.0 78 Grave Springs 8550 1.6 1.9 84 1.8 3.8 47 Kirwin 9550 7.8 3.5 223 6.4 4.0 160 Marquette 8760 2.0 -M * 4.5 -M * Middle Powder 7760 2.0 3.1 65 1.9 4.5 42 Owl Creek 8975 1.3 1.6 81 3.0 2.2 136 Powder River Pass 9480 5.6 3.0 187 4.7 4.2 112 Shell Creek 9580 7.7 5.1 151 4.8 4.7 102 Timber Creek 7950 .8 1.7 47 1.0 3.3 30 ----- ----- Basin Index (%) 125 88 SHOSHONE RIVER Blackwater 9780 14.0 7.2 194 11.4 6.7 170 Evening Star 9200 13.6 7.3 186 14.2 8.6 165 Marquette 8760 2.0 -M * 4.5 -M * Sylvan Road 7120 4.1 2.9 141 7.7 6.1 126 Younts Peak 8350 -M 4.4 * -M 5.1 * ----- ----- Basin Index (%) 182 156 POWDER RIVER Bear Trap Meadow 8200 2.5 1.5 167 3.8 3.2 119 Cloud Peak Reservoir 9860 3.9 3.9 100 4.9 4.8 102 Grave Springs 8550 1.6 1.9 84 1.8 3.8 47 Hansen Sawmill 8360 2.4 1.7 141 3.5 3.1 113 Middle Powder 7760 2.0 3.1 65 1.9 4.5 42 Powder River Pass 9480 5.6 3.0 187 4.7 4.2 112 Soldier Park 8720 1.1 -M * 3.5 -M * ----- ----- Basin Index (%) 119 87 TONGUE RIVER Big Goose 7990 1.5 2.5 60 2.3 4.1 56 Bone Springs Div 9350 4.7 5.1 92 3.9 5.0 78 Burgess Junction 7880 1.9 3.2 59 2.3 4.2 55 Dome Lake 8880 2.8 3.8 74 3.1 5.0 62 Little Goose 8870 1.8 -M * 3.7 -M * Sucker Creek 8880 2.2 3.3 67 -M 4.8 * Tie Creek 6870 .1 .8 12 2.8 4.2 67 ----- ----- Basin Index (%) 71 64 BELLE FOURCHE Cole Canyon 5910 .2 .8 25 2.1 3.6 58 ----- ----- Basin Index (%) 25 58 CHEYENNE RIVER BASIN Blind Park 6890 1.4 1.8 78 3.2 4.4 73 North Rapid Creek 6130 1.6 1.5 107 2.1 3.7 57 ----- ----- Basin Index (%) 91 65 UPPER N. PLATTE Arapaho Ridge 10960 5.4 5.8 93 5.8 7.0 83 Blackhall Mtn 9820 6.5 -M * 7.1 -M * Columbine 9160 2.6 4.7 55 6.9 7.2 96 Divide Peak 8880 2.7 4.7 57 5.9 6.9 86 Joe Wright 10120 4.1 6.1 67 9.5 8.3 114 Laprele Creek 8375 1.3 2.3 57 2.7 4.1 66 Med Bow 10500 9.2 -M * 8.3 -M * North French Creek 10130 6.6 7.2 92 7.4 7.9 94 Never Summer 10280 5.8 5.1 114 5.8 -M * Old Battle 10000 6.0 8.0 75 6.0 10.2 59 Rawah 9020 2.6 2.6 100 5.9 5.0 118 Sage Creek Basin 7850 1.5 2.3 65 3.2 4.7 68 Sand Lake 10050 7.6 7.4 103 6.7 7.5 89 South Brush Creek 8440 2.6 2.9 90 4.3 5.0 86 Tower 10500 7.1 11.7 61 9.4 11.8 80 Webber Springs 9250 3.5 5.1 69 5.8 7.8 74 Willow Creek Pass 9540 4.7 3.7 127 5.1 4.6 111 Zirkel 9340 4.0 4.8 83 8.6 8.5 101 ----- ----- Basin Index (%) 81 88 SWEETWATER Deer Park 9700 5.2 4.2 124 5.9 5.7 104 Larsen Creek 9000 1.8 2.6 69 3.9 -M * South Pass 9040 4.3 4.0 108 3.6 5.4 67 ----- ----- Basin Index (%) 105 86 LOWER N. PLATTE Casper Mtn. 7900 1.6 3.6 44 2.0 5.5 36 Laprele Creek 8375 1.3 2.3 57 2.7 4.1 66 Reno Hill 8400 2.7 3.7 73 3.7 5.0 74 Windy Peak 7900 .8 1.8 44 2.6 3.6 72 ----- ----- Basin Index (%) 56 60 LARAMIE RIVER Brooklyn Lake 10240 4.3 4.3 100 5.8 5.9 98 Cinnabar Park 9574 5.9 5.5 107 7.7 6.9 112 Crow Creek 8330 .0 2.0 0 4.1 3.7 111 Deadman Hill 10220 6.7 4.9 137 7.0 5.4 130 Rawah 9020 2.6 2.6 100 5.9 5.0 118 Roach 9700 4.4 4.1 107 6.5 5.8 112 ----- ----- Basin Index (%) 102 113 S. PLATTE Black Mountain 8920 3.0 -M * 5.2 -M * Crow Creek 8330 .0 2.0 0 4.1 3.7 111 Deadman Hill 10220 6.7 4.9 137 7.0 5.4 130 ----- ----- Basin Index (%) 97 122 LITTLE SNAKE RIVER Battle Mountain 7440 .0 1.6 0 3.0 4.7 64 Divide Peak 8880 2.7 4.7 57 5.9 6.9 86 Elk River 8700 2.7 3.1 87 5.1 5.8 88 Little Snake River 8915 2.8 3.9 72 7.0 9.1 77 Old Battle 10000 6.0 8.0 75 6.0 10.2 59 Sage Creek Basin 7850 1.5 2.3 65 3.2 4.7 68 Sandstone RS 8150 1.0 2.2 45 2.7 5.5 49 Whiskey Park 8950 3.4 4.9 69 6.2 7.6 82 ----- ----- Basin Index (%) 65 72 UPPER GREEN RIVER Big Sandy Opening 9080 3.7 3.7 100 4.2 4.1 102 Blind Bull Sum 8650 11.1 5.3 209 7.1 5.9 120 East Rim Divide 7930 3.1 2.0 155 4.0 3.5 114 Elkhart Park G.S. 9400 3.4 3.4 100 3.7 4.2 88 Gros Ventre Summit 8750 6.6 3.8 174 6.2 4.2 148 Gunsight Pass 9820 5.6 3.3 170 6.2 4.2 148 Kendall R.S. 7740 4.0 2.6 154 5.2 4.1 127 Loomis Park 8240 4.9 3.2 153 5.7 4.9 116 New Fork Lake 8340 3.0 2.4 125 2.7 3.4 79 Pocket Creek 9360 4.1 -M * 3.7 -M * Snider Basin 8060 2.3 2.9 79 4.5 4.0 112 Spring Creek Divide 9000 7.0 5.3 132 7.5 6.7 112 Triple Peak 8500 7.3 5.1 143 9.8 6.9 142 ----- ----- Basin Index (%) 144 119 LOWER GREEN RIVER Blacks Fork Jct 8869 1.8 -M * 2.7 -M * Buck Pasture 9632 3.0 -M * 3.6 -M * EF Blacks Fork GS 9360 2.0 -M * 3.2 -M * Hams Fork 7840 1.3 2.3 57 3.0 3.4 88 Hewinta 9500 1.3 2.0 65 3.1 4.6 67 Hickerson Park 9122 1.9 1.6 119 1.7 3.8 45 Hole-in-Rock 9168 1.4 1.7 82 2.1 3.6 58 Indian Creek 9425 5.9 5.9 100 4.9 6.1 80 Kelley R.S. 8180 2.9 3.1 94 3.9 5.2 75 Spirit Lk 10235 2.2 -M * 2.4 -M * Steel Creek Park 10158 3.9 4.0 98 3.9 5.3 74 ----- ----- Basin Index (%) 90 71 UPPER BEAR RIVER Bear River RS 8777 1.6 -M * 3.0 -M * Bug Lake 7987 3.3 3.6 92 5.4 5.6 96 Burts Miller Ranch 8000 .2 -M * 1.8 -M * Chalk Creek #1 9171 3.7 5.4 69 4.7 7.7 61 Hayden Fork 9130 2.4 3.1 77 4.0 6.4 62 Kelley R.S. 8180 2.9 3.1 94 3.9 5.2 75 Lily Lake 9133 1.5 2.9 52 3.1 5.6 55 Monte Cristo 8932 5.3 5.8 91 5.6 7.4 76 Salt River Summit 7760 1.6 2.1 76 3.7 4.5 82 ----- ----- Basin Index (%) 80 72 ----------------------------------------------------------------------------- -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.