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 TUESDAY: DECEMBER 4 , 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 4.3 100 6.3 6.5 97 Black Bear 8170 -M 9.5 * -M 11.5 * Blind Bull Sum 8650 5.2 5.6 93 5.4 6.2 87 Cottonwood Creek 7670 5.9 4.9 120 8.3 7.3 114 East Rim Divide 7930 2.2 2.1 105 3.6 3.6 100 Grand Targhee 9260 14.8 10.1 147 12.7 10.2 125 Granite Creek 6770 3.4 2.8 121 6.1 5.8 105 Grassy Lake 7265 7.1 6.8 104 10.5 10.6 99 Gros Ventre Summit 8750 2.4 4.1 59 3.2 4.3 74 Gunsight Pass 9820 3.0 3.4 88 5.4 4.3 126 Lewis Lake Divide 7850 6.0 7.9 76 9.8 10.8 91 Phillips Bench 8200 4.7 6.2 76 8.4 8.0 105 Salt River Summit 7640 2.7 2.2 123 4.9 4.7 104 Snake River Station 6920 4.1 3.4 121 8.5 7.1 120 Spring Creek Divide 9000 5.8 5.5 105 7.4 7.0 106 Thumb Divide 7980 2.2 3.4 65 4.8 5.8 83 Togwotee Pass 9580 7.4 7.7 96 8.5 7.7 110 Two Ocean Plateau 9240 8.6 9.0 96 7.5 8.7 86 Willow Creek 8080 6.9 6.2 111 11.2 10.3 109 Younts Peak 8350 -M 4.5 * -M 5.4 * ----- ----- Basin Index (%) 101 103 MADISON-GALLATIN Black Bear 8170 -M 9.5 * -M 11.5 * Canyon 7870 2.6 3.1 84 4.4 5.2 85 Madison Plateau 7750 3.9 5.6 70 6.0 7.9 76 West Yellowstone 6700 2.1 2.2 95 3.6 4.6 78 Whiskey Creek 6800 1.9 3.6 53 2.8 6.5 43 ----- ----- Basin Index (%) 72 69 YELLOWSTONE Beartooth Lake 9360 5.5 6.5 85 4.6 6.0 77 Burnt Mtn 5880 2.1 1.3 162 5.5 5.4 102 Canyon 7870 2.6 3.1 84 4.4 5.2 85 Cole Creek 7850 6.0 4.5 133 6.3 5.2 121 Evening Star 9200 8.3 7.6 109 10.9 9.0 121 Fisher Creek 9100 6.9 9.2 75 10.5 9.9 106 Northeast Entrance 7350 2.9 1.9 153 5.4 4.3 126 Parker Peak 9400 7.8 6.5 120 8.9 6.0 148 Sylvan Lake 8420 7.5 5.6 134 11.8 7.8 151 Thumb Divide 7980 2.2 3.4 65 4.8 5.8 83 Two Ocean Plateau 9240 8.6 9.0 96 7.5 8.7 86 White Mill 8700 5.4 6.5 83 5.1 7.6 67 Wolverine 7650 2.7 2.4 112 4.8 4.4 109 ----- ----- Basin Index (%) 101 106 WIND RIVER Burroughs Creek 8750 2.4 -M * 3.7 -M * Castle Creek 8400 1.1 -M * 2.2 -M * Cold Springs 9630 2.0 2.5 80 2.2 3.8 58 Deer Park 9700 4.3 4.3 100 4.5 5.9 76 Hobbs Park 10100 3.6 4.7 77 2.9 4.6 63 Kirwin 9550 2.4 3.5 69 2.3 4.2 55 Little Warm 9370 1.9 3.1 61 2.6 4.5 58 Owl Creek 8975 2.4 1.7 141 3.0 2.2 136 South Pass 9040 3.2 4.1 78 3.9 5.6 70 St. Lawrence Alt 8620 1.2 2.2 55 3.3 3.3 100 Togwotee Pass 9580 7.4 7.7 96 8.5 7.7 110 Townsend Creek 8700 2.8 2.6 108 3.8 4.4 86 ----- ----- Basin Index (%) 86 80 BIGHORN BASIN Bald Mtn. 9380 7.4 6.0 123 4.8 5.5 87 Bear Trap Meadow 8200 3.2 1.6 200 3.3 3.3 100 Bone Springs Div 9350 5.6 5.3 106 4.8 5.1 94 Grave Springs 8550 2.9 2.0 145 3.8 3.8 100 Kirwin 9550 2.4 3.5 69 2.3 4.2 55 Marquette 8760 3.1 -M * 3.9 -M * Middle Powder 7760 3.5 3.2 109 2.9 4.6 63 Owl Creek 8975 2.4 1.7 141 3.0 2.2 136 Powder River Pass 9480 4.0 3.2 125 3.5 4.3 81 Shell Creek 9580 -M 5.1 * -M 4.8 * Timber Creek 7950 1.4 1.7 82 3.0 3.3 91 ----- ----- Basin Index (%) 116 87 SHOSHONE RIVER Blackwater 9780 8.6 7.3 118 8.9 7.0 127 Evening Star 9200 8.3 7.6 109 10.9 9.0 121 Marquette 8760 3.1 -M * 3.9 -M * Sylvan Road 7120 4.1 3.0 137 6.7 6.3 106 Younts Peak 8350 -M 4.5 * -M 5.4 * ----- ----- Basin Index (%) 117 119 POWDER RIVER Bear Trap Meadow 8200 3.2 1.6 200 3.3 3.3 100 Cloud Peak Reservoir 9860 5.2 4.0 130 4.9 4.9 100 Grave Springs 8550 2.9 2.0 145 3.8 3.8 100 Hansen Sawmill 8360 1.9 1.7 112 3.5 3.2 109 Middle Powder 7760 3.5 3.2 109 2.9 4.6 63 Powder River Pass 9480 4.0 3.2 125 3.5 4.3 81 Soldier Park 8720 1.5 -M * 3.4 -M * ----- ----- Basin Index (%) 132 91 TONGUE RIVER Big Goose 7990 2.3 2.6 88 4.7 4.1 115 Bone Springs Div 9350 5.6 5.3 106 4.8 5.1 94 Burgess Junction 7880 2.9 3.3 88 3.9 4.4 89 Dome Lake 8880 2.6 3.9 67 3.6 5.1 71 Little Goose 8870 3.7 -M * 3.6 -M * Sucker Creek 8880 4.7 3.4 138 4.3 4.9 88 Tie Creek 6870 1.5 .9 167 5.2 4.3 121 ----- ----- Basin Index (%) 101 95 BELLE FOURCHE Cole Canyon 5910 1.6 .8 200 4.0 3.7 108 ----- ----- Basin Index (%) 200 108 CHEYENNE RIVER BASIN Blind Park 6890 2.3 1.8 128 2.8 4.5 62 North Rapid Creek 6130 1.5 1.6 94 2.4 3.8 63 ----- ----- Basin Index (%) 112 63 UPPER N. PLATTE Arapaho Ridge 10960 8.1 5.9 137 9.5 7.3 130 Blackhall Mtn 9820 8.9 -M * 12.2 -M * Columbine 9160 6.3 4.9 129 9.3 7.4 126 Divide Peak 8880 5.1 4.9 104 7.9 7.1 111 Joe Wright 10120 6.3 6.3 100 11.8 8.4 140 Laprele Creek 8375 4.2 2.3 183 5.3 4.3 123 Med Bow 10500 13.0 -M * 14.3 -M * North French Creek 10130 10.5 7.5 140 12.4 8.2 151 Never Summer 10280 7.1 5.3 134 7.9 -M * Old Battle 10000 10.6 8.3 128 12.8 10.6 121 Rawah 9020 3.2 2.8 114 5.9 5.2 113 Sage Creek Basin 7850 3.6 2.5 144 6.1 4.8 127 Sand Lake 10050 9.2 7.6 121 8.3 7.7 108 South Brush Creek 8440 3.6 3.0 120 4.7 5.1 92 Tower 10500 14.0 12.0 117 13.4 12.2 110 Webber Springs 9250 6.5 5.4 120 9.4 8.1 116 Willow Creek Pass 9540 5.2 3.8 137 6.8 4.7 145 Zirkel 9340 7.9 4.9 161 12.3 8.8 140 ----- ----- Basin Index (%) 127 124 SWEETWATER Deer Park 9700 4.3 4.3 100 4.5 5.9 76 Larsen Creek 9000 1.9 2.7 70 4.8 -M * South Pass 9040 3.2 4.1 78 3.9 5.6 70 ----- ----- Basin Index (%) 85 73 LOWER N. PLATTE Casper Mtn. 7900 4.3 3.7 116 4.4 5.6 79 Laprele Creek 8375 4.2 2.3 183 5.3 4.3 123 Reno Hill 8400 4.7 3.9 121 5.4 5.2 104 Windy Peak 7900 3.7 1.8 206 3.7 3.8 97 ----- ----- Basin Index (%) 144 99 LARAMIE RIVER Brooklyn Lake 10240 7.5 4.5 167 9.4 6.1 154 Cinnabar Park 9574 7.6 5.6 136 9.8 7.2 136 Crow Creek 8330 1.3 2.3 57 3.9 3.7 105 Deadman Hill 10220 6.1 5.0 122 6.4 5.5 116 Rawah 9020 3.2 2.8 114 5.9 5.2 113 Roach 9700 4.7 4.3 109 6.7 6.0 112 ----- ----- Basin Index (%) 124 125 S. PLATTE Black Mountain 8920 2.6 -M * 3.9 -M * Crow Creek 8330 1.3 2.3 57 3.9 3.7 105 Deadman Hill 10220 6.1 5.0 122 6.4 5.5 116 ----- ----- Basin Index (%) 101 112 LITTLE SNAKE RIVER Battle Mountain 7440 3.8 1.7 224 -M 4.8 * Divide Peak 8880 5.1 4.9 104 7.9 7.1 111 Elk River 8700 4.6 3.3 139 5.5 6.0 92 Little Snake River 8915 7.4 4.0 185 14.4 9.5 152 Old Battle 10000 10.6 8.3 128 12.8 10.6 121 Sage Creek Basin 7850 3.6 2.5 144 6.1 4.8 127 Sandstone RS 8150 5.1 2.3 222 6.5 5.7 114 Whiskey Park 8950 7.7 5.2 148 11.5 7.8 147 ----- ----- Basin Index (%) 149 126 UPPER GREEN RIVER Big Sandy Opening 9080 3.3 3.7 89 4.5 4.2 107 Blind Bull Sum 8650 5.2 5.6 93 5.4 6.2 87 East Rim Divide 7930 2.2 2.1 105 3.6 3.6 100 Elkhart Park G.S. 9400 3.6 3.6 100 4.9 4.4 111 Gros Ventre Summit 8750 2.4 4.1 59 3.2 4.3 74 Gunsight Pass 9820 3.0 3.4 88 5.4 4.3 126 Kendall R.S. 7740 2.4 2.7 89 3.8 4.2 90 Loomis Park 8240 4.0 3.4 118 5.6 5.2 108 New Fork Lake 8340 2.5 2.4 104 3.2 3.5 91 Pocket Creek 9360 5.1 -M * 6.0 -M * Snyder Basin 8060 2.9 2.9 100 4.8 4.2 114 Spring Creek Divide 9000 5.8 5.5 105 7.4 7.0 106 Triple Peak 8500 6.3 5.2 121 8.5 7.3 116 ----- ----- Basin Index (%) 98 103 LOWER GREEN RIVER Blacks Fork Jct 8869 1.8 -M * 5.0 -M * Buck Pasture 9632 4.2 -M * 7.7 -M * EF Blacks Fork GS 9360 2.8 -M * 4.4 -M * Hams Fork 7840 2.6 2.5 104 4.3 3.5 123 Hewinta 9500 2.1 2.0 105 5.2 4.8 108 Hickerson Park 9122 2.0 1.6 125 4.4 3.9 113 Hole-in-Rock 9168 1.3 1.7 76 4.3 3.7 116 Indian Creek 9425 5.0 6.2 81 4.9 6.3 78 Kelley R.S. 8180 3.8 3.3 115 5.0 5.3 94 Spirit Lk 10235 4.2 -M * 6.6 -M * Steel Creek Park 10158 4.2 4.1 102 6.4 5.5 116 ----- ----- Basin Index (%) 98 105 UPPER BEAR RIVER Bear River RS 8777 2.3 -M * 5.4 -M * Bug Lake 7987 3.3 3.7 89 7.7 5.9 131 Burts Miller Ranch 8000 1.0 -M * 2.8 -M * Chalk Creek #1 9171 4.7 5.9 80 10.1 8.0 126 Hayden Fork 9130 3.6 3.1 116 8.0 6.5 123 Kelley R.S. 8180 3.8 3.3 115 5.0 5.3 94 Lily Lake 9133 3.1 3.1 100 6.2 5.7 109 Monte Cristo 8932 6.0 6.1 98 8.3 7.6 109 Salt River Summit 7640 2.7 2.2 123 4.9 4.7 104 ----- ----- Basin Index (%) 99 115 ----------------------------------------------------------------------------- -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.