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: FEBRUARY 17 , 2018 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 14.1 12.8 110 15.7 15.7 100 Black Bear 8170 30.4 27.3 111 29.0 28.2 103 Blind Bull Sum 8650 24.2 16.3 148 14.6 14.6 100 Cottonwood Creek 7670 15.9 15.0 106 17.7 17.9 99 East Rim Divide 7930 8.8 7.4 119 8.7 8.6 101 Grand Targhee 9260 36.2 26.9 135 23.0 23.4 98 Granite Creek 6770 13.2 12.6 105 15.5 15.2 102 Grassy Lake 7265 23.2 24.3 95 26.4 27.2 97 Gros Ventre Summit 8750 9.8 9.0 109 9.9 9.2 108 Gunsight Pass 9820 11.3 9.6 118 11.4 10.1 113 Lewis Lake Divide 7850 27.9 23.5 119 -M 26.4 * Phillips Bench 8200 18.0 18.1 99 19.0 20.7 92 Salt River Summit 7640 7.0 9.5 74 8.9 12.2 73 Snake River Station 6920 13.8 13.3 104 18.3 17.3 106 Spring Creek Divide 9000 18.7 16.5 113 18.0 17.6 102 Thumb Divide 7980 13.2 10.9 121 13.8 13.5 102 Togwotee Pass 9580 23.0 16.6 139 23.6 17.8 133 Two Ocean Plateau 9240 28.8 19.7 146 20.2 19.7 103 Willow Creek 8080 23.3 19.8 118 25.6 24.4 105 Younts Peak 8350 -M 11.0 * -M 11.7 * ----- ----- Basin Index (%) 117 102 MADISON-GALLATIN Black Bear 8170 30.4 27.3 111 29.0 28.2 103 Canyon 7870 12.7 9.5 134 14.5 12.0 121 Madison Plateau 7750 18.7 15.9 118 19.1 19.2 99 West Yellowstone 6700 9.5 7.8 122 12.3 10.8 114 Whiskey Creek 6800 11.1 10.9 102 13.2 14.9 89 ----- ----- Basin Index (%) 115 104 YELLOWSTONE Beartooth Lake 9360 31.1 15.5 201 27.7 14.5 191 Burnt Mtn 5880 5.2 3.6 144 11.1 8.8 126 Canyon 7870 12.7 9.5 134 14.5 12.0 121 Cole Creek 7850 10.7 8.9 120 6.9 8.4 82 Evening Star 9200 31.9 17.8 179 30.9 20.4 151 Fisher Creek 9100 40.7 23.6 172 34.8 23.4 149 Northeast Entrance 7350 10.9 7.5 145 14.3 9.3 154 Parker Peak 9400 25.5 14.3 178 21.2 12.8 166 Sylvan Lake 8420 18.3 14.4 127 20.0 16.6 120 Thumb Divide 7980 13.2 10.9 121 13.8 13.5 102 Two Ocean Plateau 9240 28.8 19.7 146 20.2 19.7 103 White Mill 8700 32.9 16.4 201 23.7 17.5 135 Wolverine 7650 15.6 8.0 195 16.5 9.2 179 ----- ----- Basin Index (%) 163 137 WIND RIVER Burroughs Creek 8750 12.2 -M * 14.0 -M * Castle Creek 8400 6.6 -M * 7.9 -M * Cold Springs 9630 7.0 5.2 135 7.4 6.8 109 Deer Park 9700 7.6 9.9 77 10.1 14.1 72 Hobbs Park 10100 12.1 8.7 139 10.2 8.7 117 Kirwin 9550 14.9 6.2 240 13.4 8.1 165 Little Warm 9370 12.0 7.4 162 12.3 9.0 137 Owl Creek 8975 3.1 3.4 91 4.8 3.9 123 South Pass 9040 7.8 10.3 76 -M 12.3 * St. Lawrence Alt 8620 2.5 4.6 54 6.4 5.9 108 Togwotee Pass 9580 23.0 16.6 139 23.6 17.8 133 Townsend Creek 8700 5.2 5.9 88 6.5 8.0 81 ----- ----- Basin Index (%) 122 115 BIGHORN BASIN Bald Mtn. 9380 16.2 13.2 123 11.0 11.9 92 Bear Trap Meadow 8200 6.9 3.8 182 7.6 5.7 133 Bone Springs Div 9350 14.6 10.9 134 10.8 10.7 101 Grave Springs 8550 4.9 5.7 86 3.9 7.2 54 Kirwin 9550 14.9 6.2 240 13.4 8.1 165 Marquette 8760 4.1 -M * 7.8 -M * Middle Powder 7760 6.4 7.2 89 -M 8.1 * Owl Creek 8975 3.1 3.4 91 4.8 3.9 123 Powder River Pass 9480 13.3 7.3 182 11.9 8.8 135 Shell Creek 9580 16.9 10.2 166 12.6 9.7 130 Timber Creek 7950 2.6 3.1 84 -M 4.9 * ----- ----- Basin Index (%) 141 115 SHOSHONE RIVER Blackwater 9780 26.4 15.7 168 24.2 14.9 162 Evening Star 9200 31.9 17.8 179 30.9 20.4 151 Marquette 8760 4.1 -M * 7.8 -M * Sylvan Road 7120 11.5 8.7 132 16.7 13.1 127 Younts Peak 8350 -M 11.0 * -M 11.7 * ----- ----- Basin Index (%) 165 148 POWDER RIVER Bear Trap Meadow 8200 6.9 3.8 182 7.6 5.7 133 Cloud Peak Reservoir 9860 11.9 9.7 123 10.3 8.8 117 Grave Springs 8550 4.9 5.7 86 3.9 7.2 54 Hansen Sawmill 8360 5.8 4.3 135 7.1 5.5 129 Middle Powder 7760 6.4 7.2 89 -M 8.1 * Powder River Pass 9480 13.3 7.3 182 11.9 8.8 135 Soldier Park 8720 4.5 -M * 6.9 -M * ----- ----- Basin Index (%) 129 113 TONGUE RIVER Big Goose 7990 5.3 5.7 93 5.7 7.3 78 Bone Springs Div 9350 14.6 10.9 134 10.8 10.7 101 Burgess Junction 7880 6.7 7.5 89 5.8 8.3 70 Dome Lake 8880 11.0 7.9 139 8.4 9.2 91 Little Goose 8870 6.5 -M * 8.6 -M * Sucker Creek 8880 7.4 8.1 91 5.3 9.7 55 Tie Creek 6870 2.9 3.9 74 6.3 7.8 81 ----- ----- Basin Index (%) 109 80 BELLE FOURCHE Cole Canyon 5910 5.2 4.5 116 7.0 6.6 106 ----- ----- Basin Index (%) 116 106 CHEYENNE RIVER BASIN Blind Park 6890 6.4 5.7 112 8.7 8.7 100 North Rapid Creek 6130 5.8 5.4 107 6.1 7.1 86 ----- ----- Basin Index (%) 110 94 UPPER N. PLATTE Arapaho Ridge 10960 14.7 14.9 99 14.6 16.2 90 Blackhall Mtn 9820 20.1 -M * 19.9 -M * Columbine 9160 16.3 17.5 93 18.1 18.7 97 Divide Peak 8880 9.8 14.1 70 13.3 15.6 85 Joe Wright 10120 12.5 14.8 84 21.1 18.1 117 Laprele Creek 8375 4.6 6.7 69 6.0 8.5 71 Med Bow 10500 30.5 -M * 25.6 -M * North French Creek 10130 20.2 19.3 105 20.3 19.1 106 Never Summer 10280 13.3 14.2 94 11.0 -M * Old Battle 10000 18.6 22.2 84 17.9 25.7 70 Rawah 9020 8.5 7.5 113 11.7 9.9 118 Sage Creek Basin 7850 6.6 9.8 67 7.8 11.0 71 Sand Lake 10050 19.4 18.7 104 16.1 17.2 94 South Brush Creek 8440 7.3 8.6 85 8.7 10.6 82 Tower 10500 25.2 32.8 77 23.4 29.1 80 Webber Springs 9250 13.9 16.8 83 16.3 19.3 84 Willow Creek Pass 9540 10.0 8.6 116 10.6 9.4 113 Zirkel 9340 19.5 21.0 93 23.9 21.6 111 ----- ----- Basin Index (%) 89 92 SWEETWATER Deer Park 9700 7.6 9.9 77 10.1 14.1 72 Larsen Creek 9000 7.5 8.6 87 8.1 -M * South Pass 9040 7.8 10.3 76 -M 12.3 * ----- ----- Basin Index (%) 80 72* LOWER N. PLATTE Casper Mtn. 7900 5.5 9.0 61 4.1 10.2 40 Laprele Creek 8375 4.6 6.7 69 6.0 8.5 71 Reno Hill 8400 6.9 8.9 78 7.9 10.2 77 Windy Peak 7900 4.2 5.2 81 5.8 7.2 81 ----- ----- Basin Index (%) 71 66 LARAMIE RIVER Brooklyn Lake 10240 18.7 13.9 135 19.2 14.6 132 Cinnabar Park 9574 17.7 16.0 111 20.0 18.3 109 Crow Creek 8330 2.4 6.4 38 7.8 7.2 108 Deadman Hill 10220 15.0 11.5 130 14.5 11.6 125 Rawah 9020 8.5 7.5 113 11.7 9.9 118 Roach 9700 10.9 11.6 94 13.5 13.4 101 ----- ----- Basin Index (%) 109 116 S. PLATTE Black Mountain 8920 7.1 -M * 9.8 -M * Crow Creek 8330 2.4 6.4 38 7.8 7.2 108 Deadman Hill 10220 15.0 11.5 130 14.5 11.6 125 ----- ----- Basin Index (%) 97 119 LITTLE SNAKE RIVER Battle Mountain 7440 4.5 8.7 52 7.1 11.1 64 Divide Peak 8880 9.8 14.1 70 13.3 15.6 85 Elk River 8700 11.1 13.8 80 12.2 14.6 84 Little Snake River 8915 15.7 18.4 85 20.8 23.3 89 Old Battle 10000 18.6 22.2 84 17.9 25.7 70 Sage Creek Basin 7850 6.6 9.8 67 7.8 11.0 71 Sandstone RS 8150 6.5 9.9 66 6.1 13.8 44 Whiskey Park 8950 16.7 19.3 87 18.9 20.6 92 ----- ----- Basin Index (%) 77 77 UPPER GREEN RIVER Big Sandy Opening 9080 9.0 9.0 100 9.0 9.4 96 Blind Bull Sum 8650 24.2 16.3 148 14.6 14.6 100 East Rim Divide 7930 8.8 7.4 119 8.7 8.6 101 Elkhart Park G.S. 9400 9.0 8.6 105 8.4 9.5 88 Gros Ventre Summit 8750 9.8 9.0 109 9.9 9.2 108 Gunsight Pass 9820 11.3 9.6 118 11.4 10.1 113 Kendall R.S. 7740 10.8 9.0 120 11.2 10.5 107 Loomis Park 8240 12.3 10.6 116 13.1 12.7 103 New Fork Lake 8340 8.8 7.5 117 -M 7.9 * Pocket Creek 9360 6.2 -M * 5.9 -M * Snider Basin 8060 9.2 9.0 102 11.0 10.5 105 Spring Creek Divide 9000 18.7 16.5 113 18.0 17.6 102 Triple Peak 8500 21.0 15.5 135 22.9 18.2 126 ----- ----- Basin Index (%) 119 106 LOWER GREEN RIVER Blacks Fork Jct 8869 5.1 -M * 6.4 -M * Buck Pasture 9632 8.0 -M * 9.1 -M * EF Blacks Fork GS 9360 6.0 -M * 4.4 -M * Hams Fork 7840 5.9 8.4 70 6.3 8.3 76 Hewinta 9500 5.1 7.0 73 7.9 9.9 80 Hickerson Park 9122 4.7 5.1 92 4.1 6.9 59 Hole-in-Rock 9168 4.1 4.8 85 4.6 6.5 71 Indian Creek 9425 14.4 16.6 87 10.4 16.1 65 Kelley R.S. 8180 8.5 10.7 79 9.8 13.2 74 Spirit Lk 10235 5.1 -M * 6.0 -M * Steel Creek Park 10158 9.0 10.3 87 9.6 11.2 86 ----- ----- Basin Index (%) 82 73 UPPER BEAR RIVER Bear River RS 8777 6.1 -M * 7.6 -M * Bug Lake 7987 10.1 13.3 76 10.9 14.1 77 Burts Miller Ranch 8000 3.8 -M * 4.4 -M * Chalk Creek #1 9171 9.8 16.1 61 10.9 17.8 61 Hayden Fork 9130 8.6 11.0 78 11.0 14.9 74 Kelley R.S. 8180 8.5 10.7 79 9.8 13.2 74 Lily Lake 9133 7.4 9.0 82 7.9 12.1 65 Monte Cristo 8932 13.3 18.9 70 13.4 18.6 72 Salt River Summit 7640 7.0 9.5 74 8.9 12.2 73 ----- ----- Basin Index (%) 73 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.