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 8 , 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 4.6 93 6.4 7.1 90 Black Bear 8170 -M 10.9 * -M 12.4 * Blind Bull Sum 8650 -M 6.1 * -M 6.6 * Cottonwood Creek 7670 5.9 5.4 109 8.3 7.9 105 East Rim Divide 7930 2.5 2.3 109 3.8 3.9 97 Grand Targhee 9260 15.1 10.3 147 13.0 10.5 124 Granite Creek 6770 3.5 3.3 106 6.2 6.4 97 Grassy Lake 7265 7.1 7.6 93 10.7 11.6 92 Gros Ventre Summit 8750 2.5 4.4 57 3.7 4.6 80 Gunsight Pass 9820 3.1 3.7 84 5.5 4.6 120 Lewis Lake Divide 7850 6.1 8.6 71 10.0 11.6 86 Phillips Bench 8200 4.8 7.0 69 8.5 8.8 97 Salt River Summit 7640 2.9 2.6 112 5.2 5.1 102 Snake River Station 6920 4.1 3.8 108 8.6 7.7 112 Spring Creek Divide 9000 6.2 6.1 102 7.9 7.6 104 Thumb Divide 7980 2.3 3.7 62 4.9 6.3 78 Togwotee Pass 9580 7.5 8.1 93 8.5 8.3 102 Two Ocean Plateau 9240 8.8 9.7 91 7.6 9.3 82 Willow Creek 8080 7.0 6.8 103 11.4 11.1 103 Younts Peak 8350 -M 4.8 * -M 5.7 * ----- ----- Basin Index (%) 96 98 MADISON-GALLATIN Black Bear 8170 -M 10.9 * -M 12.4 * Canyon 7870 2.8 3.2 88 4.8 5.5 87 Madison Plateau 7750 4.0 6.5 62 6.1 8.6 71 West Yellowstone 6700 2.2 2.6 85 3.8 4.9 78 Whiskey Creek 6800 2.1 4.0 52 3.1 6.9 45 ----- ----- Basin Index (%) 68 69 YELLOWSTONE Beartooth Lake 9360 5.6 7.0 80 4.8 6.4 75 Burnt Mtn 5880 2.3 1.4 164 5.9 5.6 105 Canyon 7870 2.8 3.2 88 4.8 5.5 87 Cole Creek 7850 6.3 4.9 129 6.1 5.3 115 Evening Star 9200 8.4 8.1 104 11.1 9.6 116 Fisher Creek 9100 7.0 9.8 71 10.8 10.6 102 Northeast Entrance 7350 3.0 2.2 136 5.5 4.6 120 Parker Peak 9400 8.0 6.9 116 9.1 6.4 142 Sylvan Lake 8420 7.5 6.1 123 12.0 8.3 145 Thumb Divide 7980 2.3 3.7 62 4.9 6.3 78 Two Ocean Plateau 9240 8.8 9.7 91 7.6 9.3 82 White Mill 8700 5.5 6.9 80 5.2 8.2 63 Wolverine 7650 2.8 2.8 100 4.9 4.6 107 ----- ----- Basin Index (%) 97 102 WIND RIVER Burroughs Creek 8750 2.6 -M * 4.0 -M * Castle Creek 8400 1.1 -M * 2.3 -M * Cold Springs 9630 2.2 2.5 88 2.5 3.9 64 Deer Park 9700 4.3 4.6 93 4.8 6.4 75 Hobbs Park 10100 3.8 5.1 75 3.6 4.9 73 Kirwin 9550 2.7 3.7 73 2.9 4.4 66 Little Warm 9370 2.1 3.4 62 3.1 4.8 65 Owl Creek 8975 2.6 1.8 144 3.2 2.3 139 South Pass 9040 3.4 4.5 76 4.1 6.1 67 St. Lawrence Alt 8620 -M 2.3 * -M 3.5 * Togwotee Pass 9580 7.5 8.1 93 8.5 8.3 102 Townsend Creek 8700 3.1 2.8 111 4.1 4.7 87 ----- ----- Basin Index (%) 87 80 BIGHORN BASIN Bald Mtn. 9380 7.5 6.2 121 5.1 5.8 88 Bear Trap Meadow 8200 3.4 1.8 189 3.6 3.4 106 Bone Springs Div 9350 5.6 5.6 100 5.0 5.4 93 Grave Springs 8550 2.9 2.2 132 4.8 4.0 120 Kirwin 9550 2.7 3.7 73 2.9 4.4 66 Marquette 8760 3.5 -M * 4.1 -M * Middle Powder 7760 3.5 3.2 109 3.0 4.7 64 Owl Creek 8975 2.6 1.8 144 3.2 2.3 139 Powder River Pass 9480 4.0 3.4 118 3.8 4.5 84 Shell Creek 9580 -M 5.2 * -M 5.0 * Timber Creek 7950 1.3 1.9 68 2.9 3.4 85 ----- ----- Basin Index (%) 112 91 SHOSHONE RIVER Blackwater 9780 8.8 7.6 116 9.1 7.4 123 Evening Star 9200 8.4 8.1 104 11.1 9.6 116 Marquette 8760 3.5 -M * 4.1 -M * Sylvan Road 7120 4.1 3.4 121 7.1 6.7 106 Younts Peak 8350 -M 4.8 * -M 5.7 * ----- ----- Basin Index (%) 112 115 POWDER RIVER Bear Trap Meadow 8200 3.4 1.8 189 3.6 3.4 106 Cloud Peak Reservoir 9860 5.0 4.2 119 5.0 5.0 100 Grave Springs 8550 2.9 2.2 132 4.8 4.0 120 Hansen Sawmill 8360 2.0 1.8 111 3.6 3.2 112 Middle Powder 7760 3.5 3.2 109 3.0 4.7 64 Powder River Pass 9480 4.0 3.4 118 3.8 4.5 84 Soldier Park 8720 1.7 -M * 3.5 -M * ----- ----- Basin Index (%) 125 96 TONGUE RIVER Big Goose 7990 2.4 2.8 86 5.1 4.3 119 Bone Springs Div 9350 5.6 5.6 100 5.0 5.4 93 Burgess Junction 7880 3.0 3.4 88 4.0 4.5 89 Dome Lake 8880 2.4 4.0 60 3.8 5.3 72 Little Goose 8870 3.7 -M * 3.7 -M * Sucker Creek 8880 4.7 3.6 131 4.7 5.1 92 Tie Creek 6870 1.5 1.0 150 5.3 4.5 118 ----- ----- Basin Index (%) 96 96 BELLE FOURCHE Cole Canyon 5910 1.7 1.0 170 4.4 3.9 113 ----- ----- Basin Index (%) 170 113 CHEYENNE RIVER BASIN Blind Park 6890 2.2 1.9 116 2.8 4.7 60 North Rapid Creek 6130 -M 1.8 * -M 3.9 * ----- ----- Basin Index (%) 116 60 UPPER N. PLATTE Arapaho Ridge 10960 8.5 6.3 135 9.9 7.9 125 Blackhall Mtn 9820 9.3 -M * 12.6 -M * Columbine 9160 6.9 5.2 133 9.9 8.0 124 Divide Peak 8880 5.5 5.3 104 8.3 7.5 111 Joe Wright 10120 6.8 6.6 103 12.4 8.9 139 Laprele Creek 8375 4.4 2.5 176 5.7 4.5 127 Med Bow 10500 14.0 -M * 15.1 -M * North French Creek 10130 11.3 8.0 141 13.3 8.6 155 Never Summer 10280 7.6 5.7 133 8.2 -M * Old Battle 10000 11.0 8.7 126 13.4 11.4 118 Rawah 9020 3.2 3.0 107 6.1 5.5 111 Sage Creek Basin 7850 3.9 2.9 134 6.4 5.1 125 Sand Lake 10050 9.8 8.0 122 8.9 8.2 109 South Brush Creek 8440 4.0 3.1 129 5.1 5.3 96 Tower 10500 14.9 12.9 116 14.4 13.1 110 Webber Springs 9250 6.9 5.9 117 10.6 8.7 122 Willow Creek Pass 9540 5.5 3.8 145 7.3 4.9 149 Zirkel 9340 8.3 5.5 151 12.7 9.5 134 ----- ----- Basin Index (%) 127 123 SWEETWATER Deer Park 9700 4.3 4.6 93 4.8 6.4 75 Larsen Creek 9000 2.2 3.0 73 5.0 -M * South Pass 9040 3.4 4.5 76 4.1 6.1 67 ----- ----- Basin Index (%) 82 71 LOWER N. PLATTE Casper Mtn. 7900 4.3 3.9 110 4.7 5.8 81 Laprele Creek 8375 4.4 2.5 176 5.7 4.5 127 Reno Hill 8400 4.9 4.2 117 6.2 5.4 115 Windy Peak 7900 4.1 2.1 195 4.2 4.0 105 ----- ----- Basin Index (%) 139 106 LARAMIE RIVER Brooklyn Lake 10240 8.0 5.0 160 9.8 6.6 148 Cinnabar Park 9574 8.0 6.0 133 10.4 7.8 133 Crow Creek 8330 1.6 3.0 53 4.2 4.0 105 Deadman Hill 10220 6.4 5.1 125 6.7 5.8 116 Rawah 9020 3.2 3.0 107 6.1 5.5 111 Roach 9700 -M 4.5 * -M 6.4 * ----- ----- Basin Index (%) 123 125 S. PLATTE Black Mountain 8920 2.8 -M * 4.1 -M * Crow Creek 8330 1.6 3.0 53 4.2 4.0 105 Deadman Hill 10220 6.4 5.1 125 6.7 5.8 116 ----- ----- Basin Index (%) 99 111 LITTLE SNAKE RIVER Battle Mountain 7440 4.0 2.1 190 6.3 5.1 124 Divide Peak 8880 5.5 5.3 104 8.3 7.5 111 Elk River 8700 -M 3.7 * -M 6.5 * Little Snake River 8915 7.8 4.4 177 15.0 10.3 146 Old Battle 10000 11.0 8.7 126 13.4 11.4 118 Sage Creek Basin 7850 3.9 2.9 134 6.4 5.1 125 Sandstone RS 8150 5.2 2.7 193 6.9 6.1 113 Whiskey Park 8950 8.0 6.1 131 11.9 8.5 140 ----- ----- Basin Index (%) 141 126 UPPER GREEN RIVER Big Sandy Opening 9080 3.5 4.0 88 4.8 4.6 104 Blind Bull Sum 8650 -M 6.1 * -M 6.6 * East Rim Divide 7930 2.5 2.3 109 3.8 3.9 97 Elkhart Park G.S. 9400 3.8 3.8 100 5.2 4.7 111 Gros Ventre Summit 8750 2.5 4.4 57 3.7 4.6 80 Gunsight Pass 9820 3.1 3.7 84 5.5 4.6 120 Kendall R.S. 7740 2.6 3.1 84 4.0 4.6 87 Loomis Park 8240 4.1 3.7 111 5.7 5.6 102 New Fork Lake 8340 2.7 2.7 100 3.7 3.7 100 Pocket Creek 9360 5.4 -M * 6.2 -M * Snyder Basin 8060 3.2 3.1 103 5.4 4.5 120 Spring Creek Divide 9000 6.2 6.1 102 7.9 7.6 104 Triple Peak 8500 6.4 5.6 114 8.6 7.9 109 ----- ----- Basin Index (%) 96 104 LOWER GREEN RIVER Blacks Fork Jct 8869 2.2 -M * 4.7 -M * Buck Pasture 9632 4.4 -M * 7.7 -M * EF Blacks Fork GS 9360 3.1 -M * 4.4 -M * Hams Fork 7840 2.9 2.8 104 4.6 3.7 124 Hewinta 9500 2.5 2.1 119 5.5 5.0 110 Hickerson Park 9122 2.1 1.7 124 4.8 4.1 117 Hole-in-Rock 9168 1.5 1.8 83 4.6 3.8 121 Indian Creek 9425 5.4 6.6 82 5.5 6.8 81 Kelley R.S. 8180 4.1 3.7 111 5.3 5.8 91 Spirit Lk 10235 4.3 -M * 6.5 -M * Steel Creek Park 10158 4.5 4.6 98 6.5 5.8 112 ----- ----- Basin Index (%) 99 105 UPPER BEAR RIVER Bear River RS 8777 -M -M * -M -M * Bug Lake 7987 3.5 4.0 88 8.0 6.5 123 Burts Miller Ranch 8000 1.1 -M * 3.1 -M * Chalk Creek #1 9171 4.9 6.8 72 10.2 8.6 119 Hayden Fork 9130 3.7 3.4 109 8.2 7.0 117 Kelley R.S. 8180 4.1 3.7 111 5.3 5.8 91 Lily Lake 9133 3.3 3.4 97 6.3 6.0 105 Monte Cristo 8932 6.2 6.7 93 8.8 8.3 106 Salt River Summit 7640 2.9 2.6 112 5.2 5.1 102 ----- ----- Basin Index (%) 93 110 ----------------------------------------------------------------------------- -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.