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 FRIDAY: FEBRUARY 9 , 2018 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 13.5 11.4 118 15.0 14.8 101 Black Bear 8170 29.0 25.2 115 27.6 26.2 105 Blind Bull Sum 8650 23.7 15.0 158 14.3 13.6 105 Cottonwood Creek 7670 15.2 13.7 111 17.3 16.7 104 East Rim Divide 7930 8.4 7.0 120 8.3 8.1 102 Grand Targhee 9260 34.9 24.8 141 22.5 21.8 103 Granite Creek 6770 12.4 11.5 108 15.1 14.3 106 Grassy Lake 7265 21.9 21.9 100 25.0 25.3 99 Gros Ventre Summit 8750 9.7 8.7 111 9.4 8.6 109 Gunsight Pass 9820 11.0 8.7 126 11.1 9.5 117 Lewis Lake Divide 7850 26.3 21.5 122 27.5 24.5 112 Phillips Bench 8200 16.8 16.7 101 17.6 19.3 91 Salt River Summit 7640 6.8 8.4 81 8.7 11.3 77 Snake River Station 6920 13.7 12.0 114 17.9 16.3 110 Spring Creek Divide 9000 18.2 15.6 117 17.5 16.3 107 Thumb Divide 7980 12.9 9.9 130 13.4 12.7 106 Togwotee Pass 9580 22.0 15.6 141 22.4 16.7 134 Two Ocean Plateau 9240 27.8 18.8 148 20.1 18.3 110 Willow Creek 8080 22.0 18.1 122 24.5 22.7 108 Younts Peak 8350 -M 10.2 * -M 11.0 * ----- ----- Basin Index (%) 122 106 MADISON-GALLATIN Black Bear 8170 29.0 25.2 115 27.6 26.2 105 Canyon 7870 12.0 8.7 138 13.9 11.3 123 Madison Plateau 7750 17.8 14.9 119 18.3 18.2 101 West Yellowstone 6700 9.0 7.2 125 11.7 10.2 115 Whiskey Creek 6800 10.8 9.9 109 12.8 14.0 91 ----- ----- Basin Index (%) 119 106 YELLOWSTONE Beartooth Lake 9360 30.1 14.7 205 -M 13.5 * Burnt Mtn 5880 4.2 2.8 150 9.8 8.3 118 Canyon 7870 12.0 8.7 138 13.9 11.3 123 Cole Creek 7850 10.0 8.8 114 6.3 8.0 79 Evening Star 9200 31.2 16.7 187 30.8 19.0 162 Fisher Creek 9100 39.4 21.8 181 32.6 21.9 149 Northeast Entrance 7350 10.4 6.8 153 14.0 8.7 161 Parker Peak 9400 24.5 13.6 180 21.1 12.0 176 Sylvan Lake 8420 17.3 13.5 128 19.3 15.6 124 Thumb Divide 7980 12.9 9.9 130 13.4 12.7 106 Two Ocean Plateau 9240 27.8 18.8 148 20.1 18.3 110 White Mill 8700 32.0 15.4 208 23.1 16.3 142 Wolverine 7650 -M 7.3 * -M 8.6 * ----- ----- Basin Index (%) 166 134 WIND RIVER Burroughs Creek 8750 11.8 -M * 13.7 -M * Castle Creek 8400 6.3 -M * 7.7 -M * Cold Springs 9630 6.8 4.8 142 7.2 6.5 111 Deer Park 9700 7.8 9.5 82 10.0 13.1 76 Hobbs Park 10100 11.6 8.1 143 9.8 8.2 120 Kirwin 9550 14.5 6.1 238 13.0 7.6 171 Little Warm 9370 11.6 6.7 173 11.9 8.6 138 Owl Creek 8975 3.1 3.2 97 4.8 3.7 130 South Pass 9040 7.8 9.8 80 -M 11.5 * St. Lawrence Alt 8620 2.5 4.3 58 6.1 5.6 109 Togwotee Pass 9580 22.0 15.6 141 22.4 16.7 134 Townsend Creek 8700 5.2 5.6 93 6.4 7.5 85 ----- ----- Basin Index (%) 126 118 BIGHORN BASIN Bald Mtn. 9380 15.4 11.5 134 10.5 11.2 94 Bear Trap Meadow 8200 6.7 3.6 186 7.4 5.3 140 Bone Springs Div 9350 13.9 10.1 138 10.4 10.1 103 Grave Springs 8550 4.7 5.2 90 3.7 6.8 54 Kirwin 9550 14.5 6.1 238 13.0 7.6 171 Marquette 8760 4.1 -M * 7.6 -M * Middle Powder 7760 6.2 6.7 93 -M 7.7 * Owl Creek 8975 3.1 3.2 97 4.8 3.7 130 Powder River Pass 9480 12.8 6.9 186 11.6 8.2 141 Shell Creek 9580 -M 9.6 * 12.3 9.3 132 Timber Creek 7950 2.5 3.1 81 -M 4.7 * ----- ----- Basin Index (%) 141 118 SHOSHONE RIVER Blackwater 9780 25.7 15.1 170 23.5 13.9 169 Evening Star 9200 31.2 16.7 187 30.8 19.0 162 Marquette 8760 4.1 -M * 7.6 -M * Sylvan Road 7120 11.3 8.1 140 16.2 12.4 131 Younts Peak 8350 -M 10.2 * -M 11.0 * ----- ----- Basin Index (%) 171 156 POWDER RIVER Bear Trap Meadow 8200 6.7 3.6 186 7.4 5.3 140 Cloud Peak Reservoir 9860 11.5 8.9 129 10.2 8.3 123 Grave Springs 8550 4.7 5.2 90 3.7 6.8 54 Hansen Sawmill 8360 5.6 4.1 137 6.9 5.3 130 Middle Powder 7760 6.2 6.7 93 -M 7.7 * Powder River Pass 9480 12.8 6.9 186 11.6 8.2 141 Soldier Park 8720 4.4 -M * 6.7 -M * ----- ----- Basin Index (%) 134 117 TONGUE RIVER Big Goose 7990 5.1 5.2 98 5.4 6.8 79 Bone Springs Div 9350 13.9 10.1 138 10.4 10.1 103 Burgess Junction 7880 6.5 7.1 92 5.3 7.8 68 Dome Lake 8880 9.9 7.3 136 8.0 8.7 92 Little Goose 8870 6.2 -M * 8.2 -M * Sucker Creek 8880 7.1 7.5 95 -M 9.1 * Tie Creek 6870 2.7 3.6 75 5.5 7.4 74 ----- ----- Basin Index (%) 111 85 BELLE FOURCHE Cole Canyon 5910 4.9 3.8 129 6.5 6.1 107 ----- ----- Basin Index (%) 129 107 CHEYENNE RIVER BASIN Blind Park 6890 6.2 5.3 117 8.6 8.1 106 North Rapid Creek 6130 5.6 4.8 117 5.9 6.6 89 ----- ----- Basin Index (%) 117 99 UPPER N. PLATTE Arapaho Ridge 10960 13.4 14.0 96 13.4 15.1 89 Blackhall Mtn 9820 17.8 -M * 17.8 -M * Columbine 9160 14.1 15.8 89 16.4 17.3 95 Divide Peak 8880 9.0 13.4 67 12.4 14.5 86 Joe Wright 10120 10.8 13.4 81 19.1 16.8 114 Laprele Creek 8375 4.6 5.8 79 6.0 7.9 76 Med Bow 10500 28.9 -M * 24.4 -M * North French Creek 10130 19.0 17.1 111 19.1 17.7 108 Never Summer 10280 12.0 13.2 91 9.8 -M * Old Battle 10000 16.8 20.6 82 16.5 23.7 70 Rawah 9020 6.9 6.8 101 10.3 9.5 108 Sage Creek Basin 7850 6.3 9.0 70 7.4 10.4 71 Sand Lake 10050 18.1 17.4 104 15.0 15.9 94 South Brush Creek 8440 6.6 7.6 87 8.1 10.0 81 Tower 10500 21.9 29.9 73 22.3 26.9 83 Webber Springs 9250 12.2 15.2 80 14.5 17.9 81 Willow Creek Pass 9540 8.7 8.1 107 9.5 8.7 109 Zirkel 9340 16.5 19.5 85 21.3 20.2 105 ----- ----- Basin Index (%) 87 91 SWEETWATER Deer Park 9700 7.8 9.5 82 10.0 13.1 76 Larsen Creek 9000 7.3 7.9 92 8.0 -M * South Pass 9040 7.8 9.8 80 -M 11.5 * ----- ----- Basin Index (%) 84 76* LOWER N. PLATTE Casper Mtn. 7900 5.4 8.1 67 -M 9.5 * Laprele Creek 8375 4.6 5.8 79 6.0 7.9 76 Reno Hill 8400 6.9 8.2 84 7.9 9.4 84 Windy Peak 7900 4.3 4.4 98 5.8 6.6 88 ----- ----- Basin Index (%) 80 82 LARAMIE RIVER Brooklyn Lake 10240 17.5 12.6 139 18.1 13.6 133 Cinnabar Park 9574 -M 13.9 * -M 16.9 * Crow Creek 8330 2.1 5.8 36 7.6 6.7 113 Deadman Hill 10220 13.2 10.7 123 12.8 10.8 119 Rawah 9020 6.9 6.8 101 10.3 9.5 108 Roach 9700 9.6 10.6 91 12.3 12.5 98 ----- ----- Basin Index (%) 106 115 S. PLATTE Black Mountain 8920 6.1 -M * 8.7 -M * Crow Creek 8330 2.1 5.8 36 7.6 6.7 113 Deadman Hill 10220 13.2 10.7 123 12.8 10.8 119 ----- ----- Basin Index (%) 93 117 LITTLE SNAKE RIVER Battle Mountain 7440 3.4 7.6 45 6.7 10.2 66 Divide Peak 8880 9.0 13.4 67 12.4 14.5 86 Elk River 8700 9.3 12.4 75 10.6 13.5 79 Little Snake River 8915 13.9 16.8 83 19.0 21.9 87 Old Battle 10000 16.8 20.6 82 16.5 23.7 70 Sage Creek Basin 7850 6.3 9.0 70 7.4 10.4 71 Sandstone RS 8150 5.6 8.8 64 5.6 12.7 44 Whiskey Park 8950 14.7 17.2 85 17.3 18.9 92 ----- ----- Basin Index (%) 75 76 UPPER GREEN RIVER Big Sandy Opening 9080 8.8 8.6 102 8.8 8.8 100 Blind Bull Sum 8650 23.7 15.0 158 14.3 13.6 105 East Rim Divide 7930 8.4 7.0 120 8.3 8.1 102 Elkhart Park G.S. 9400 8.7 7.9 110 8.1 8.9 91 Gros Ventre Summit 8750 9.7 8.7 111 9.4 8.6 109 Gunsight Pass 9820 11.0 8.7 126 11.1 9.5 117 Kendall R.S. 7740 10.2 8.2 124 10.8 9.8 110 Loomis Park 8240 11.5 10.1 114 12.4 11.9 104 New Fork Lake 8340 8.3 7.0 119 7.6 7.5 101 Pocket Creek 9360 6.4 -M * 6.1 -M * Snider Basin 8060 9.0 8.3 108 10.8 9.8 110 Spring Creek Divide 9000 18.2 15.6 117 17.5 16.3 107 Triple Peak 8500 20.2 14.2 142 22.0 16.9 130 ----- ----- Basin Index (%) 124 109 LOWER GREEN RIVER Blacks Fork Jct 8869 5.0 -M * 6.1 -M * Buck Pasture 9632 7.6 -M * 8.3 -M * EF Blacks Fork GS 9360 5.4 -M * -M -M * Hams Fork 7840 5.8 7.7 75 6.2 7.7 81 Hewinta 9500 4.7 6.3 75 7.2 9.1 79 Hickerson Park 9122 4.5 4.2 107 4.2 6.5 65 Hole-in-Rock 9168 4.0 4.3 93 4.6 6.0 77 Indian Creek 9425 14.1 15.4 92 10.4 14.9 70 Kelley R.S. 8180 8.6 9.5 91 9.6 12.2 79 Spirit Lk 10235 5.0 -M * 5.9 -M * Steel Creek Park 10158 8.3 9.4 88 9.0 10.5 86 ----- ----- Basin Index (%) 88 77 UPPER BEAR RIVER Bear River RS 8777 5.8 -M * 7.1 -M * Bug Lake 7987 10.0 12.1 83 10.6 13.1 81 Burts Miller Ranch 8000 3.8 -M * 4.5 -M * Chalk Creek #1 9171 9.5 14.3 66 10.3 16.6 62 Hayden Fork 9130 8.1 9.3 87 10.2 13.9 73 Kelley R.S. 8180 8.6 9.5 91 9.6 12.2 79 Lily Lake 9133 7.1 7.8 91 7.4 11.3 65 Monte Cristo 8932 12.6 17.0 74 12.8 17.3 74 Salt River Summit 7640 6.8 8.4 81 8.7 11.3 77 ----- ----- Basin Index (%) 80 73 ----------------------------------------------------------------------------- -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.