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 3 , 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 4.2 150 8.3 6.4 130 Black Bear 8170 12.6 9.3 135 12.2 11.3 108 Blind Bull Sum 8650 11.2 5.4 207 7.1 6.0 118 Cottonwood Creek 7670 4.7 4.7 100 6.5 7.2 90 East Rim Divide 7930 3.2 2.1 152 4.0 3.6 111 Grand Targhee 9260 19.9 10.0 199 12.2 10.0 122 Granite Creek 6770 4.6 2.8 164 7.8 5.7 137 Grassy Lake 7265 7.5 6.7 112 11.1 10.5 106 Gros Ventre Summit 8750 6.7 3.9 172 6.3 4.3 147 Gunsight Pass 9820 5.6 3.4 165 6.3 4.2 150 Lewis Lake Divide 7850 10.1 7.7 131 12.8 10.5 122 Phillips Bench 8200 7.0 6.0 117 9.0 7.9 114 Salt River Summit 7760 1.7 2.2 77 3.8 4.6 83 Snake River Station 6920 4.2 3.4 124 8.2 7.0 117 Spring Creek Divide 9000 7.0 5.4 130 7.5 6.9 109 Thumb Divide 7980 6.5 3.3 197 7.7 5.7 135 Togwotee Pass 9580 12.3 7.5 164 12.0 7.6 158 Two Ocean Plateau 9240 16.3 8.8 185 11.1 8.5 131 Willow Creek 8380 8.2 6.1 134 11.4 10.1 113 Younts Peak 8350 -M 4.4 * -M 5.3 * ----- ----- Basin Index (%) 151 120 MADISON-GALLATIN Black Bear 8170 12.6 9.3 135 12.2 11.3 108 Canyon 7870 4.3 3.1 139 5.6 5.0 112 Madison Plateau 7750 7.5 5.4 139 8.6 7.7 112 West Yellowstone 6700 2.9 2.1 138 5.5 4.5 122 Whiskey Creek 6800 3.9 3.4 115 5.1 6.2 82 ----- ----- Basin Index (%) 134 107 YELLOWSTONE Beartooth Lake 9360 12.6 6.4 197 10.8 5.8 186 Burnt Mtn 5880 .2 1.3 15 5.4 5.4 100 Canyon 7870 4.3 3.1 139 5.6 5.0 112 Cole Creek 7850 4.6 4.4 105 3.7 5.1 73 Evening Star 9200 13.8 7.5 184 14.4 8.8 164 Fisher Creek 9100 16.7 9.1 184 14.0 9.7 144 Northeast Entrance 7350 2.1 1.8 117 5.8 4.3 135 Parker Peak 9400 12.5 6.4 195 10.2 5.9 173 Sylvan Lake 8420 8.9 5.4 165 9.6 7.6 126 Thumb Divide 7980 6.5 3.3 197 7.7 5.7 135 Two Ocean Plateau 9240 16.3 8.8 185 11.1 8.5 131 White Mill 8700 13.5 6.3 214 8.9 7.5 119 Wolverine 7650 3.3 2.2 150 6.9 4.3 160 ----- ----- Basin Index (%) 175 136 WIND RIVER Burroughs Creek 8750 5.1 -M * 6.4 -M * Castle Creek 8400 2.6 -M * 4.2 -M * Cold Springs 9630 3.2 2.5 128 3.8 3.7 103 Deer Park 9700 5.3 4.3 123 6.0 5.9 102 Hobbs Park 10100 7.9 4.6 172 6.4 4.6 139 Kirwin 9550 8.0 3.5 229 6.5 4.1 159 Little Warm 9370 7.3 3.0 243 6.9 4.4 157 Owl Creek 8975 1.4 1.7 82 3.1 2.2 141 South Pass 9040 4.3 4.0 108 3.7 5.5 67 St. Lawrence Alt 8620 1.8 2.1 86 4.0 3.3 121 Togwotee Pass 9580 12.3 7.5 164 12.0 7.6 158 Townsend Creek 8700 2.7 2.5 108 4.2 4.4 95 ----- ----- Basin Index (%) 152 124 BIGHORN BASIN Bald Mtn. 9380 6.5 5.9 110 4.2 5.4 78 Bear Trap Meadow 8200 2.6 1.5 173 3.8 3.2 119 Bone Springs Div 9350 4.7 5.2 90 3.9 5.1 76 Grave Springs 8550 1.6 2.0 80 1.8 3.8 47 Kirwin 9550 8.0 3.5 229 6.5 4.1 159 Marquette 8760 2.0 -M * 4.5 -M * Middle Powder 7760 2.1 3.1 68 1.9 4.5 42 Owl Creek 8975 1.4 1.7 82 3.1 2.2 141 Powder River Pass 9480 5.6 3.1 181 4.7 4.3 109 Shell Creek 9580 7.8 5.1 153 4.9 4.8 102 Timber Creek 7950 .9 1.7 53 .9 3.3 27 ----- ----- Basin Index (%) 126 88 SHOSHONE RIVER Blackwater 9780 14.0 7.2 194 11.5 6.8 169 Evening Star 9200 13.8 7.5 184 14.4 8.8 164 Marquette 8760 2.0 -M * 4.5 -M * Sylvan Road 7120 4.1 2.9 141 7.6 6.2 123 Younts Peak 8350 -M 4.4 * -M 5.3 * ----- ----- Basin Index (%) 181 154 POWDER RIVER Bear Trap Meadow 8200 2.6 1.5 173 3.8 3.2 119 Cloud Peak Reservoir 9860 3.9 4.0 98 5.0 4.8 104 Grave Springs 8550 1.6 2.0 80 1.8 3.8 47 Hansen Sawmill 8360 2.5 1.7 147 3.6 3.1 116 Middle Powder 7760 2.1 3.1 68 1.9 4.5 42 Powder River Pass 9480 5.6 3.1 181 4.7 4.3 109 Soldier Park 8720 1.2 -M * 3.5 -M * ----- ----- Basin Index (%) 119 88 TONGUE RIVER Big Goose 7990 1.6 2.6 62 2.4 4.1 59 Bone Springs Div 9350 4.7 5.2 90 3.9 5.1 76 Burgess Junction 7880 2.1 3.2 66 2.4 4.3 56 Dome Lake 8880 2.8 3.8 74 3.2 5.1 63 Little Goose 8870 1.9 -M * 3.8 -M * Sucker Creek 8880 2.3 3.3 70 -M 4.9 * Tie Creek 6870 .0 .8 0 2.8 4.3 65 ----- ----- Basin Index (%) 71 64 BELLE FOURCHE Cole Canyon 5910 .2 .8 25 2.2 3.6 61 ----- ----- Basin Index (%) 25 61 CHEYENNE RIVER BASIN Blind Park 6890 1.5 1.8 83 3.3 4.5 73 North Rapid Creek 6130 1.7 1.5 113 2.2 3.8 58 ----- ----- Basin Index (%) 97 66 UPPER N. PLATTE Arapaho Ridge 10960 5.3 5.9 90 5.8 7.2 81 Blackhall Mtn 9820 6.6 -M * 7.2 -M * Columbine 9160 2.7 4.8 56 7.1 7.3 97 Divide Peak 8880 2.8 4.8 58 5.9 7.0 84 Joe Wright 10120 4.1 6.2 66 9.5 8.4 113 Laprele Creek 8375 1.3 2.3 57 2.8 4.2 67 Med Bow 10500 9.3 -M * 8.3 -M * North French Creek 10130 6.6 7.3 90 7.5 8.1 93 Never Summer 10280 5.8 5.2 112 5.9 -M * Old Battle 10000 6.1 8.2 74 6.1 10.4 59 Rawah 9020 2.6 2.7 96 5.9 5.2 113 Sage Creek Basin 7850 1.5 2.4 62 3.3 4.8 69 Sand Lake 10050 7.7 7.5 103 6.8 7.6 89 South Brush Creek 8440 2.7 3.0 90 4.3 5.1 84 Tower 10500 7.2 11.8 61 9.5 12.1 79 Webber Springs 9250 3.6 5.2 69 5.9 8.0 74 Willow Creek Pass 9540 4.8 3.8 126 5.1 4.6 111 Zirkel 9340 4.0 4.9 82 8.7 8.7 100 ----- ----- Basin Index (%) 80 87 SWEETWATER Deer Park 9700 5.3 4.3 123 6.0 5.9 102 Larsen Creek 9000 1.8 2.7 67 3.9 -M * South Pass 9040 4.3 4.0 108 3.7 5.5 67 ----- ----- Basin Index (%) 104 85 LOWER N. PLATTE Casper Mtn. 7900 1.6 3.6 44 2.1 5.5 38 Laprele Creek 8375 1.3 2.3 57 2.8 4.2 67 Reno Hill 8400 2.8 3.8 74 3.8 5.1 75 Windy Peak 7900 .8 1.8 44 2.8 3.7 76 ----- ----- Basin Index (%) 57 62 LARAMIE RIVER Brooklyn Lake 10240 4.3 4.4 98 5.8 6.0 97 Cinnabar Park 9574 6.0 5.5 109 7.8 7.0 111 Crow Creek 8330 .0 2.2 0 4.0 3.7 108 Deadman Hill 10220 6.7 5.0 134 7.0 5.5 127 Rawah 9020 2.6 2.7 96 5.9 5.2 113 Roach 9700 4.5 4.2 107 6.5 5.9 110 ----- ----- Basin Index (%) 100 111 S. PLATTE Black Mountain 8920 3.1 -M * 5.2 -M * Crow Creek 8330 .0 2.2 0 4.0 3.7 108 Deadman Hill 10220 6.7 5.0 134 7.0 5.5 127 ----- ----- Basin Index (%) 93 120 LITTLE SNAKE RIVER Battle Mountain 7440 .0 1.6 0 3.3 4.8 69 Divide Peak 8880 2.8 4.8 58 5.9 7.0 84 Elk River 8700 2.7 3.2 84 5.2 6.0 87 Little Snake River 8915 3.0 4.0 75 7.1 9.3 76 Old Battle 10000 6.1 8.2 74 6.1 10.4 59 Sage Creek Basin 7850 1.5 2.4 62 3.3 4.8 69 Sandstone RS 8150 1.0 2.3 43 2.8 5.6 50 Whiskey Park 8950 3.4 5.1 67 6.2 7.7 81 ----- ----- Basin Index (%) 65 72 UPPER GREEN RIVER Big Sandy Opening 9080 3.7 3.7 100 4.3 4.2 102 Blind Bull Sum 8650 11.2 5.4 207 7.1 6.0 118 East Rim Divide 7930 3.2 2.1 152 4.0 3.6 111 Elkhart Park G.S. 9400 3.6 3.5 103 3.9 4.3 91 Gros Ventre Summit 8750 6.7 3.9 172 6.3 4.3 147 Gunsight Pass 9820 5.6 3.4 165 6.3 4.2 150 Kendall R.S. 7740 4.0 2.7 148 5.2 4.2 124 Loomis Park 8240 4.9 3.3 148 5.7 5.1 112 New Fork Lake 8340 3.0 2.4 125 2.9 3.5 83 Pocket Creek 9360 4.2 -M * 3.7 -M * Snider Basin 8060 2.4 2.9 83 4.7 4.1 115 Spring Creek Divide 9000 7.0 5.4 130 7.5 6.9 109 Triple Peak 8500 7.3 5.1 143 9.9 7.1 139 ----- ----- Basin Index (%) 143 118 LOWER GREEN RIVER Blacks Fork Jct 8869 1.9 -M * 2.7 -M * Buck Pasture 9632 2.9 -M * 3.6 -M * EF Blacks Fork GS 9360 2.0 -M * 3.0 -M * Hams Fork 7840 1.3 2.4 54 3.0 3.5 86 Hewinta 9500 1.3 2.0 65 3.1 4.7 66 Hickerson Park 9122 2.0 1.6 125 1.8 3.8 47 Hole-in-Rock 9168 1.5 1.7 88 2.1 3.6 58 Indian Creek 9425 6.0 6.1 98 5.0 6.2 81 Kelley R.S. 8180 3.0 3.2 94 4.0 5.2 77 Spirit Lk 10235 2.2 -M * 2.2 -M * Steel Creek Park 10158 4.0 4.1 98 3.9 5.4 72 ----- ----- Basin Index (%) 91 71 UPPER BEAR RIVER Bear River RS 8777 1.6 -M * 3.0 -M * Bug Lake 7987 3.1 3.6 86 5.4 5.7 95 Burts Miller Ranch 8000 .2 -M * 1.9 -M * Chalk Creek #1 9171 3.7 5.6 66 4.7 7.8 60 Hayden Fork 9130 2.5 3.1 81 4.0 6.5 62 Kelley R.S. 8180 3.0 3.2 94 4.0 5.2 77 Lily Lake 9133 1.8 3.0 60 3.1 5.7 54 Monte Cristo 8932 5.3 6.0 88 5.7 7.5 76 Salt River Summit 7760 1.7 2.2 77 3.8 4.6 83 ----- ----- Basin Index (%) 79 71 ----------------------------------------------------------------------------- -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.