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 1 , 2018 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 4.2 4.0 105 6.2 6.0 103 Black Bear 8170 -M 9.0 * -M 10.6 * Blind Bull Sum 8650 5.1 5.1 100 5.3 5.7 93 Cottonwood Creek 7670 5.3 4.4 120 7.7 6.9 112 East Rim Divide 7930 2.3 2.0 115 3.7 3.4 109 Grand Targhee 9260 14.5 9.9 146 12.5 9.8 128 Granite Creek 6770 3.5 2.6 135 6.0 5.4 111 Grassy Lake 7265 7.0 6.6 106 10.3 9.9 104 Gros Ventre Summit 8750 2.5 3.7 68 3.1 4.2 74 Gunsight Pass 9820 3.0 3.3 91 5.3 4.1 129 Lewis Lake Divide 7850 6.0 7.4 81 9.7 9.8 99 Phillips Bench 8200 4.9 5.6 88 8.3 7.4 112 Salt River Summit 7640 2.6 2.1 124 4.9 4.4 111 Snake River Station 6920 4.0 3.3 121 8.4 6.6 127 Spring Creek Divide 9000 5.8 5.2 112 7.4 6.5 114 Thumb Divide 7980 2.3 3.2 72 4.8 5.4 89 Togwotee Pass 9580 7.3 7.2 101 8.3 7.3 114 Two Ocean Plateau 9240 8.6 8.6 100 7.5 8.1 93 Willow Creek 8080 6.3 5.7 111 10.6 9.6 110 Younts Peak 8350 -M 4.3 * -M 5.0 * ----- ----- Basin Index (%) 106 108 MADISON-GALLATIN Black Bear 8170 -M 9.0 * -M 10.6 * Canyon 7870 2.6 3.0 87 4.4 4.8 92 Madison Plateau 7750 3.8 5.1 75 5.9 7.2 82 West Yellowstone 6700 2.1 1.9 111 3.7 4.2 88 Whiskey Creek 6800 1.9 3.2 59 2.7 5.8 47 ----- ----- Basin Index (%) 79 76 YELLOWSTONE Beartooth Lake 9360 5.4 6.1 89 4.6 5.5 84 Burnt Mtn 5880 2.1 1.3 162 5.5 5.1 108 Canyon 7870 2.6 3.0 87 4.4 4.8 92 Cole Creek 7850 6.3 4.1 154 6.3 5.0 126 Evening Star 9200 8.3 7.2 115 11.0 8.3 133 Fisher Creek 9100 6.8 8.8 77 10.4 9.1 114 Northeast Entrance 7350 2.8 1.7 165 5.4 4.1 132 Parker Peak 9400 7.8 6.1 128 8.8 5.6 157 Sylvan Lake 8420 6.7 5.2 129 11.0 7.2 153 Thumb Divide 7980 2.3 3.2 72 4.8 5.4 89 Two Ocean Plateau 9240 8.6 8.6 100 7.5 8.1 93 White Mill 8700 5.4 6.0 90 5.2 7.1 73 Wolverine 7650 2.7 2.0 135 4.9 4.1 120 ----- ----- Basin Index (%) 107 113 WIND RIVER Burroughs Creek 8750 2.5 -M * 3.8 -M * Castle Creek 8400 1.1 -M * 2.3 -M * Cold Springs 9630 2.1 2.5 84 2.3 3.7 62 Deer Park 9700 4.3 4.1 105 4.6 5.6 82 Hobbs Park 10100 3.7 4.5 82 3.3 4.5 73 Kirwin 9550 2.7 3.4 79 2.7 4.0 68 Little Warm 9370 2.1 2.9 72 3.2 4.2 76 Owl Creek 8975 2.4 1.6 150 3.0 2.2 136 South Pass 9040 3.4 3.9 87 4.0 5.3 75 St. Lawrence Alt 8620 1.4 2.1 67 3.3 3.2 103 Togwotee Pass 9580 7.3 7.2 101 8.3 7.3 114 Townsend Creek 8700 3.0 2.5 120 4.0 4.3 93 ----- ----- Basin Index (%) 93 87 BIGHORN BASIN Bald Mtn. 9380 7.4 5.8 128 4.8 5.2 92 Bear Trap Meadow 8200 3.1 1.4 221 3.3 3.2 103 Bone Springs Div 9350 5.5 5.1 108 4.7 4.9 96 Grave Springs 8550 2.8 1.9 147 3.6 3.7 97 Kirwin 9550 2.7 3.4 79 2.7 4.0 68 Marquette 8760 3.2 -M * 4.0 -M * Middle Powder 7760 3.3 3.1 106 2.9 4.4 66 Owl Creek 8975 2.4 1.6 150 3.0 2.2 136 Powder River Pass 9480 3.7 2.9 128 3.4 4.1 83 Shell Creek 9580 6.1 5.0 122 5.5 4.6 120 Timber Creek 7950 1.4 1.7 82 2.9 3.2 91 ----- ----- Basin Index (%) 120 93 SHOSHONE RIVER Blackwater 9780 8.7 7.1 123 9.0 6.6 136 Evening Star 9200 8.3 7.2 115 11.0 8.3 133 Marquette 8760 3.2 -M * 4.0 -M * Sylvan Road 7120 3.8 2.8 136 6.2 5.9 105 Younts Peak 8350 -M 4.3 * -M 5.0 * ----- ----- Basin Index (%) 122 126 POWDER RIVER Bear Trap Meadow 8200 3.1 1.4 221 3.3 3.2 103 Cloud Peak Reservoir 9860 5.2 3.8 137 4.9 4.8 102 Grave Springs 8550 2.8 1.9 147 3.6 3.7 97 Hansen Sawmill 8360 1.8 1.6 112 3.4 3.0 113 Middle Powder 7760 3.3 3.1 106 2.9 4.4 66 Powder River Pass 9480 3.7 2.9 128 3.4 4.1 83 Soldier Park 8720 1.5 -M * 3.3 -M * ----- ----- Basin Index (%) 135 93 TONGUE RIVER Big Goose 7990 2.3 2.4 96 4.3 4.0 108 Bone Springs Div 9350 5.5 5.1 108 4.7 4.9 96 Burgess Junction 7880 2.9 3.1 94 3.7 4.2 88 Dome Lake 8880 2.8 3.7 76 3.7 4.9 76 Little Goose 8870 3.7 -M * 3.6 -M * Sucker Creek 8880 4.6 3.3 139 4.3 4.7 91 Tie Creek 6870 1.4 .8 175 5.0 4.2 119 ----- ----- Basin Index (%) 106 96 BELLE FOURCHE Cole Canyon 5910 1.1 .8 138 3.5 3.6 97 ----- ----- Basin Index (%) 138 97 CHEYENNE RIVER BASIN Blind Park 6890 1.8 1.8 100 2.4 4.4 55 North Rapid Creek 6130 1.2 1.5 80 2.1 3.7 57 ----- ----- Basin Index (%) 91 56 UPPER N. PLATTE Arapaho Ridge 10960 8.0 5.8 138 9.4 6.8 138 Blackhall Mtn 9820 8.8 -M * 12.0 -M * Columbine 9160 6.2 4.6 135 9.1 7.0 130 Divide Peak 8880 5.1 4.5 113 7.7 6.7 115 Joe Wright 10120 6.2 6.0 103 11.5 8.1 142 Laprele Creek 8375 4.1 2.3 178 5.2 4.1 127 Med Bow 10500 12.8 -M * 13.9 -M * North French Creek 10130 10.1 7.0 144 12.0 7.7 156 Never Summer 10280 7.1 5.0 142 7.8 -M * Old Battle 10000 10.5 7.8 135 12.9 9.9 130 Rawah 9020 3.0 2.5 120 5.9 4.9 120 Sage Creek Basin 7850 3.6 2.2 164 6.1 4.5 136 Sand Lake 10050 9.1 7.3 125 8.1 7.3 111 South Brush Creek 8440 3.5 2.8 125 4.6 4.9 94 Tower 10500 13.3 11.5 116 13.0 11.5 113 Webber Springs 9250 6.7 5.0 134 10.2 7.7 132 Willow Creek Pass 9540 5.1 3.7 138 6.8 4.5 151 Zirkel 9340 8.0 4.7 170 12.3 8.1 152 ----- ----- Basin Index (%) 133 130 SWEETWATER Deer Park 9700 4.3 4.1 105 4.6 5.6 82 Larsen Creek 9000 2.1 2.5 84 4.9 -M * South Pass 9040 3.4 3.9 87 4.0 5.3 75 ----- ----- Basin Index (%) 93 79 LOWER N. PLATTE Casper Mtn. 7900 4.0 3.5 114 4.1 5.4 76 Laprele Creek 8375 4.1 2.3 178 5.2 4.1 127 Reno Hill 8400 4.4 3.6 122 5.5 5.0 110 Windy Peak 7900 3.4 1.8 189 3.6 3.6 100 ----- ----- Basin Index (%) 142 102 LARAMIE RIVER Brooklyn Lake 10240 7.6 4.3 177 9.2 5.8 159 Cinnabar Park 9574 7.6 5.4 141 9.8 6.7 146 Crow Creek 8330 1.3 2.0 65 3.8 3.6 106 Deadman Hill 10220 6.1 4.8 127 6.4 5.3 121 Rawah 9020 3.0 2.5 120 5.9 4.9 120 Roach 9700 4.7 4.0 118 6.7 5.7 118 ----- ----- Basin Index (%) 132 131 S. PLATTE Black Mountain 8920 2.6 -M * 3.9 -M * Crow Creek 8330 1.3 2.0 65 3.8 3.6 106 Deadman Hill 10220 6.1 4.8 127 6.4 5.3 121 ----- ----- Basin Index (%) 109 115 LITTLE SNAKE RIVER Battle Mountain 7440 3.5 1.5 233 4.2 4.6 91 Divide Peak 8880 5.1 4.5 113 7.7 6.7 115 Elk River 8700 4.5 3.0 150 5.1 5.7 89 Little Snake River 8915 7.4 3.8 195 14.2 8.7 163 Old Battle 10000 10.5 7.8 135 12.9 9.9 130 Sage Creek Basin 7850 3.6 2.2 164 6.1 4.5 136 Sandstone RS 8150 5.0 2.2 227 6.3 5.4 117 Whiskey Park 8950 7.4 4.8 154 11.2 7.4 151 ----- ----- Basin Index (%) 158 128 UPPER GREEN RIVER Big Sandy Opening 9080 3.4 3.7 92 4.6 4.0 115 Blind Bull Sum 8650 5.1 5.1 100 5.3 5.7 93 East Rim Divide 7930 2.3 2.0 115 3.7 3.4 109 Elkhart Park G.S. 9400 3.5 3.3 106 4.7 4.2 112 Gros Ventre Summit 8750 2.5 3.7 68 3.1 4.2 74 Gunsight Pass 9820 3.0 3.3 91 5.3 4.1 129 Kendall R.S. 7740 2.5 2.6 96 3.8 4.0 95 Loomis Park 8240 4.0 3.2 125 5.5 4.8 115 New Fork Lake 8340 2.5 2.3 109 3.1 3.4 91 Pocket Creek 9360 5.2 -M * 6.0 -M * Snyder Basin 8060 3.1 2.8 111 4.9 3.9 126 Spring Creek Divide 9000 5.8 5.2 112 7.4 6.5 114 Triple Peak 8500 6.3 5.0 126 8.4 6.8 124 ----- ----- Basin Index (%) 104 109 LOWER GREEN RIVER Blacks Fork Jct 8869 1.8 -M * 4.5 -M * Buck Pasture 9632 4.4 -M * 7.5 -M * EF Blacks Fork GS 9360 3.0 -M * 4.4 -M * Hams Fork 7840 2.5 2.2 114 4.2 3.3 127 Hewinta 9500 2.2 2.0 110 5.3 4.6 115 Hickerson Park 9122 2.1 1.5 140 4.7 3.8 124 Hole-in-Rock 9168 1.4 1.7 82 4.4 3.5 126 Indian Creek 9425 4.8 5.7 84 4.7 5.9 80 Kelley R.S. 8180 3.7 3.0 123 4.7 5.0 94 Spirit Lk 10235 4.1 -M * 6.6 -M * Steel Creek Park 10158 4.3 4.0 108 6.2 5.3 117 ----- ----- Basin Index (%) 104 109 UPPER BEAR RIVER Bear River RS 8777 2.3 -M * 5.4 -M * Bug Lake 7987 3.4 3.5 97 7.6 5.5 138 Burts Miller Ranch 8000 2.8 -M * 2.9 -M * Chalk Creek #1 9171 4.5 5.3 85 9.8 7.6 129 Hayden Fork 9130 3.5 3.0 117 7.9 6.3 125 Kelley R.S. 8180 3.7 3.0 123 4.7 5.0 94 Lily Lake 9133 3.2 2.9 110 6.0 5.5 109 Monte Cristo 8932 5.6 5.6 100 7.9 7.3 108 Salt River Summit 7640 2.6 2.1 124 4.9 4.4 111 ----- ----- Basin Index (%) 104 117 ----------------------------------------------------------------------------- -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.