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 THURSDAY: FEBRUARY 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 13.5 11.2 121 15.0 14.6 103 Black Bear 8170 28.8 24.7 117 27.6 26.0 106 Blind Bull Sum 8650 23.5 14.9 158 14.3 13.5 106 Cottonwood Creek 7670 15.2 13.6 112 17.2 16.6 104 East Rim Divide 7930 8.4 7.0 120 8.2 8.1 101 Grand Targhee 9260 35.0 24.6 142 22.4 21.6 104 Granite Creek 6770 12.4 11.3 110 15.1 14.3 106 Grassy Lake 7265 21.7 21.7 100 24.9 25.1 99 Gros Ventre Summit 8750 9.6 8.7 110 9.4 8.6 109 Gunsight Pass 9820 10.9 8.7 125 11.1 9.4 118 Lewis Lake Divide 7850 25.9 21.2 122 27.4 24.2 113 Phillips Bench 8200 16.7 16.5 101 17.6 19.1 92 Salt River Summit 7640 6.8 8.3 82 8.7 11.2 78 Snake River Station 6920 13.5 11.9 113 17.8 16.2 110 Spring Creek Divide 9000 18.1 15.4 118 17.4 16.1 108 Thumb Divide 7980 12.7 9.8 130 13.4 12.7 106 Togwotee Pass 9580 21.9 15.6 140 22.3 16.6 134 Two Ocean Plateau 9240 27.4 18.7 147 20.0 18.2 110 Willow Creek 8080 22.0 18.1 122 24.5 22.5 109 Younts Peak 8350 -M 10.1 * -M 10.9 * ----- ----- Basin Index (%) 122 106 MADISON-GALLATIN Black Bear 8170 28.8 24.7 117 27.6 26.0 106 Canyon 7870 11.8 8.6 137 13.6 11.3 120 Madison Plateau 7750 17.7 14.8 120 18.3 18.1 101 West Yellowstone 6700 8.8 7.2 122 11.7 10.2 115 Whiskey Creek 6800 10.8 9.9 109 12.8 13.9 92 ----- ----- Basin Index (%) 119 106 YELLOWSTONE Beartooth Lake 9360 29.0 14.5 200 -M 13.4 * Burnt Mtn 5880 4.4 2.7 163 10.0 8.3 120 Canyon 7870 11.8 8.6 137 13.6 11.3 120 Cole Creek 7850 10.1 8.7 116 6.5 7.9 82 Evening Star 9200 30.1 16.7 180 30.7 18.8 163 Fisher Creek 9100 38.3 21.6 177 32.0 21.8 147 Northeast Entrance 7350 9.9 6.7 148 13.5 8.6 157 Parker Peak 9400 24.1 13.5 179 20.8 11.9 175 Sylvan Lake 8420 17.2 13.5 127 19.3 15.5 125 Thumb Divide 7980 12.7 9.8 130 13.4 12.7 106 Two Ocean Plateau 9240 27.4 18.7 147 20.0 18.2 110 White Mill 8700 30.4 15.3 199 22.2 16.2 137 Wolverine 7650 -M 7.3 * -M 8.5 * ----- ----- Basin Index (%) 163 134 WIND RIVER Burroughs Creek 8750 11.6 -M * 13.6 -M * Castle Creek 8400 6.3 -M * 7.6 -M * Cold Springs 9630 6.7 4.8 140 7.1 6.5 109 Deer Park 9700 7.8 9.5 82 9.9 13.0 76 Hobbs Park 10100 11.4 8.0 142 9.7 8.1 120 Kirwin 9550 14.2 6.1 233 12.9 7.5 172 Little Warm 9370 11.6 6.6 176 11.8 8.5 139 Owl Creek 8975 3.0 3.1 97 4.7 3.7 127 South Pass 9040 7.7 9.7 79 -M 11.5 * St. Lawrence Alt 8620 2.6 4.2 62 6.1 5.6 109 Togwotee Pass 9580 21.9 15.6 140 22.3 16.6 134 Townsend Creek 8700 5.1 5.6 91 6.3 7.4 85 ----- ----- Basin Index (%) 126 118 BIGHORN BASIN Bald Mtn. 9380 15.1 11.3 134 10.3 11.1 93 Bear Trap Meadow 8200 6.7 3.6 186 7.4 5.3 140 Bone Springs Div 9350 13.3 10.0 133 9.9 10.0 99 Grave Springs 8550 4.7 5.1 92 3.7 6.8 54 Kirwin 9550 14.2 6.1 233 12.9 7.5 172 Marquette 8760 4.1 -M * 7.6 -M * Middle Powder 7760 6.2 6.7 93 -M 7.7 * Owl Creek 8975 3.0 3.1 97 4.7 3.7 127 Powder River Pass 9480 12.6 6.9 183 11.5 8.2 140 Shell Creek 9580 -M 9.5 * 11.9 9.2 129 Timber Creek 7950 2.5 3.1 81 -M 4.6 * ----- ----- Basin Index (%) 140 117 SHOSHONE RIVER Blackwater 9780 25.2 15.0 168 23.0 13.8 167 Evening Star 9200 30.1 16.7 180 30.7 18.8 163 Marquette 8760 4.1 -M * 7.6 -M * Sylvan Road 7120 11.1 8.0 139 16.0 12.4 129 Younts Peak 8350 -M 10.1 * -M 10.9 * ----- ----- Basin Index (%) 167 155 POWDER RIVER Bear Trap Meadow 8200 6.7 3.6 186 7.4 5.3 140 Cloud Peak Reservoir 9860 11.2 8.8 127 10.0 8.2 122 Grave Springs 8550 4.7 5.1 92 3.7 6.8 54 Hansen Sawmill 8360 5.5 4.1 134 6.8 5.3 128 Middle Powder 7760 6.2 6.7 93 -M 7.7 * Powder River Pass 9480 12.6 6.9 183 11.5 8.2 140 Soldier Park 8720 4.3 -M * 6.8 -M * ----- ----- Basin Index (%) 133 117 TONGUE RIVER Big Goose 7990 5.1 5.1 100 5.5 6.8 81 Bone Springs Div 9350 13.3 10.0 133 9.9 10.0 99 Burgess Junction 7880 6.3 7.0 90 5.4 7.8 69 Dome Lake 8880 9.5 7.2 132 7.7 8.7 89 Little Goose 8870 6.2 -M * 8.2 -M * Sucker Creek 8880 7.0 7.4 95 -M 9.1 * Tie Creek 6870 2.8 3.6 78 6.0 7.4 81 ----- ----- Basin Index (%) 109 85 BELLE FOURCHE Cole Canyon 5910 4.7 3.7 127 6.3 6.1 103 ----- ----- Basin Index (%) 127 103 CHEYENNE RIVER BASIN Blind Park 6890 5.7 5.2 110 8.0 8.1 99 North Rapid Creek 6130 5.3 4.7 113 5.8 6.5 89 ----- ----- Basin Index (%) 111 95 UPPER N. PLATTE Arapaho Ridge 10960 13.4 13.9 96 13.3 15.0 89 Blackhall Mtn 9820 17.7 -M * 17.8 -M * Columbine 9160 14.1 15.6 90 16.4 17.1 96 Divide Peak 8880 8.9 13.3 67 12.4 14.4 86 Joe Wright 10120 10.7 13.4 80 19.1 16.8 114 Laprele Creek 8375 4.6 5.8 79 5.9 7.9 75 Med Bow 10500 28.9 -M * 24.3 -M * North French Creek 10130 18.9 16.9 112 19.1 17.5 109 Never Summer 10280 11.9 13.1 91 9.8 -M * Old Battle 10000 16.7 20.4 82 16.4 23.5 70 Rawah 9020 6.9 6.7 103 10.2 9.4 109 Sage Creek Basin 7850 6.1 8.9 69 7.3 10.3 71 Sand Lake 10050 18.0 17.3 104 14.9 15.8 94 South Brush Creek 8440 6.6 7.6 87 8.2 9.9 83 Tower 10500 21.8 29.5 74 22.2 26.7 83 Webber Springs 9250 12.2 15.0 81 14.5 17.8 81 Willow Creek Pass 9540 8.7 8.0 109 9.5 8.6 110 Zirkel 9340 16.4 19.4 85 21.2 20.1 105 ----- ----- Basin Index (%) 87 91 SWEETWATER Deer Park 9700 7.8 9.5 82 9.9 13.0 76 Larsen Creek 9000 7.0 7.9 89 7.9 -M * South Pass 9040 7.7 9.7 79 -M 11.5 * ----- ----- Basin Index (%) 83 76* LOWER N. PLATTE Casper Mtn. 7900 5.4 8.0 68 -M 9.4 * Laprele Creek 8375 4.6 5.8 79 5.9 7.9 75 Reno Hill 8400 6.8 8.2 83 7.8 9.4 83 Windy Peak 7900 4.2 4.4 95 5.8 6.6 88 ----- ----- Basin Index (%) 80 82 LARAMIE RIVER Brooklyn Lake 10240 17.4 12.4 140 18.0 13.5 133 Cinnabar Park 9574 -M 13.8 * -M 16.9 * Crow Creek 8330 2.1 5.7 37 7.7 6.6 117 Deadman Hill 10220 13.1 10.6 124 12.8 10.7 120 Rawah 9020 6.9 6.7 103 10.2 9.4 109 Roach 9700 9.6 10.6 91 12.3 12.4 99 ----- ----- Basin Index (%) 107 116 S. PLATTE Black Mountain 8920 6.1 -M * 8.8 -M * Crow Creek 8330 2.1 5.7 37 7.7 6.6 117 Deadman Hill 10220 13.1 10.6 124 12.8 10.7 120 ----- ----- Basin Index (%) 93 118 LITTLE SNAKE RIVER Battle Mountain 7440 3.4 7.5 45 6.5 10.1 64 Divide Peak 8880 8.9 13.3 67 12.4 14.4 86 Elk River 8700 9.3 12.2 76 10.6 13.4 79 Little Snake River 8915 13.8 16.6 83 19.0 21.8 87 Old Battle 10000 16.7 20.4 82 16.4 23.5 70 Sage Creek Basin 7850 6.1 8.9 69 7.3 10.3 71 Sandstone RS 8150 5.6 8.6 65 5.5 12.5 44 Whiskey Park 8950 14.6 17.1 85 17.2 18.8 91 ----- ----- Basin Index (%) 75 76 UPPER GREEN RIVER Big Sandy Opening 9080 8.8 8.6 102 8.8 8.7 101 Blind Bull Sum 8650 23.5 14.9 158 14.3 13.5 106 East Rim Divide 7930 8.4 7.0 120 8.2 8.1 101 Elkhart Park G.S. 9400 8.6 7.8 110 8.1 8.9 91 Gros Ventre Summit 8750 9.6 8.7 110 9.4 8.6 109 Gunsight Pass 9820 10.9 8.7 125 11.1 9.4 118 Kendall R.S. 7740 10.0 8.1 123 10.8 9.7 111 Loomis Park 8240 11.5 10.0 115 12.4 11.8 105 New Fork Lake 8340 8.3 7.0 119 -M 7.4 * Pocket Creek 9360 6.3 -M * 6.0 -M * Snider Basin 8060 9.0 8.2 110 10.7 9.7 110 Spring Creek Divide 9000 18.1 15.4 118 17.4 16.1 108 Triple Peak 8500 20.1 14.0 144 22.0 16.8 131 ----- ----- Basin Index (%) 124 110 LOWER GREEN RIVER Blacks Fork Jct 8869 4.9 -M * 6.1 -M * Buck Pasture 9632 7.6 -M * 8.3 -M * EF Blacks Fork GS 9360 5.4 -M * 5.4 -M * Hams Fork 7840 5.7 7.6 75 6.1 7.6 80 Hewinta 9500 5.3 6.3 84 7.5 9.0 83 Hickerson Park 9122 4.6 4.1 112 4.2 6.4 66 Hole-in-Rock 9168 4.0 4.2 95 4.5 6.0 75 Indian Creek 9425 14.0 15.2 92 10.4 14.8 70 Kelley R.S. 8180 8.5 9.5 89 9.6 12.1 79 Spirit Lk 10235 4.9 -M * 5.8 -M * Steel Creek Park 10158 8.6 9.2 93 9.0 10.4 87 ----- ----- Basin Index (%) 90 77 UPPER BEAR RIVER Bear River RS 8777 5.7 -M * 7.2 -M * Bug Lake 7987 9.9 12.0 82 10.6 13.0 82 Burts Miller Ranch 8000 3.9 -M * 4.6 -M * Chalk Creek #1 9171 9.5 14.1 67 10.3 16.4 63 Hayden Fork 9130 8.1 9.2 88 10.2 13.8 74 Kelley R.S. 8180 8.5 9.5 89 9.6 12.1 79 Lily Lake 9133 7.0 7.7 91 7.4 11.2 66 Monte Cristo 8932 12.6 16.8 75 12.8 17.1 75 Salt River Summit 7640 6.8 8.3 82 8.7 11.2 78 ----- ----- 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.