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 WEDNESDAY: FEBRUARY 7 , 2018 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 13.3 11.1 120 14.9 14.5 103 Black Bear 8170 28.7 24.3 118 27.5 25.8 107 Blind Bull Sum 8650 23.5 14.7 160 14.2 13.3 107 Cottonwood Creek 7670 15.2 13.6 112 17.2 16.4 105 East Rim Divide 7930 8.3 6.9 120 8.2 8.0 102 Grand Targhee 9260 34.9 24.4 143 22.3 21.5 104 Granite Creek 6770 12.4 11.2 111 15.1 14.1 107 Grassy Lake 7265 21.5 21.4 100 24.8 24.9 100 Gros Ventre Summit 8750 9.6 8.6 112 9.3 8.5 109 Gunsight Pass 9820 10.8 8.6 126 11.0 9.2 120 Lewis Lake Divide 7850 25.7 20.9 123 27.4 23.9 115 Phillips Bench 8200 16.6 16.4 101 17.6 18.9 93 Salt River Summit 7640 6.8 8.3 82 8.6 11.0 78 Snake River Station 6920 13.2 11.7 113 17.7 16.0 111 Spring Creek Divide 9000 18.0 15.3 118 17.3 16.0 108 Thumb Divide 7980 12.7 9.7 131 13.4 12.6 106 Togwotee Pass 9580 21.8 15.5 141 22.2 16.4 135 Two Ocean Plateau 9240 27.4 18.5 148 20.0 17.9 112 Willow Creek 8080 21.9 18.1 121 24.4 22.4 109 Younts Peak 8350 -M 10.1 * -M 10.8 * ----- ----- Basin Index (%) 123 107 MADISON-GALLATIN Black Bear 8170 28.7 24.3 118 27.5 25.8 107 Canyon 7870 11.7 8.5 138 13.5 11.1 122 Madison Plateau 7750 17.7 14.6 121 18.3 18.0 102 West Yellowstone 6700 8.8 7.2 122 11.7 10.0 117 Whiskey Creek 6800 10.7 9.8 109 12.9 13.7 94 ----- ----- Basin Index (%) 120 107 YELLOWSTONE Beartooth Lake 9360 28.2 14.4 196 25.5 13.3 192 Burnt Mtn 5880 4.3 2.7 159 9.8 8.2 120 Canyon 7870 11.7 8.5 138 13.5 11.1 122 Cole Creek 7850 10.1 8.7 116 6.4 7.9 81 Evening Star 9200 29.1 16.7 174 30.5 18.6 164 Fisher Creek 9100 37.5 21.5 174 31.7 21.6 147 Northeast Entrance 7350 9.5 6.7 142 13.1 8.6 152 Parker Peak 9400 23.7 13.5 176 20.5 11.8 174 Sylvan Lake 8420 16.8 13.5 124 18.8 15.3 123 Thumb Divide 7980 12.7 9.7 131 13.4 12.6 106 Two Ocean Plateau 9240 27.4 18.5 148 20.0 17.9 112 White Mill 8700 29.5 15.2 194 21.5 16.0 134 Wolverine 7650 13.7 7.2 190 -M 8.5 * ----- ----- Basin Index (%) 162 138 WIND RIVER Burroughs Creek 8750 11.4 -M * 13.4 -M * Castle Creek 8400 6.2 -M * 7.5 -M * Cold Springs 9630 6.6 4.8 138 6.9 6.4 108 Deer Park 9700 7.7 9.5 81 9.7 12.8 76 Hobbs Park 10100 11.3 8.0 141 9.6 8.1 119 Kirwin 9550 14.1 6.0 235 12.7 7.5 169 Little Warm 9370 11.4 6.6 173 11.7 8.5 138 Owl Creek 8975 2.9 3.1 94 4.6 3.7 124 South Pass 9040 7.6 9.7 78 -M 11.3 * St. Lawrence Alt 8620 2.3 4.2 55 6.0 5.5 109 Togwotee Pass 9580 21.8 15.5 141 22.2 16.4 135 Townsend Creek 8700 5.0 5.5 91 6.1 7.3 84 ----- ----- Basin Index (%) 124 117 BIGHORN BASIN Bald Mtn. 9380 14.8 11.2 132 9.9 11.1 89 Bear Trap Meadow 8200 6.6 3.6 183 7.4 5.3 140 Bone Springs Div 9350 13.0 9.9 131 9.6 10.0 96 Grave Springs 8550 4.7 5.1 92 3.7 6.7 55 Kirwin 9550 14.1 6.0 235 12.7 7.5 169 Marquette 8760 4.1 -M * 7.5 -M * Middle Powder 7760 6.2 6.6 94 -M 7.7 * Owl Creek 8975 2.9 3.1 94 4.6 3.7 124 Powder River Pass 9480 12.6 6.9 183 11.3 8.1 140 Shell Creek 9580 -M 9.4 * 11.7 9.2 127 Timber Creek 7950 2.4 3.1 77 -M 4.6 * ----- ----- Basin Index (%) 139 115 SHOSHONE RIVER Blackwater 9780 24.9 15.0 166 22.7 13.7 166 Evening Star 9200 29.1 16.7 174 30.5 18.6 164 Marquette 8760 4.1 -M * 7.5 -M * Sylvan Road 7120 10.5 8.0 131 15.4 12.3 125 Younts Peak 8350 -M 10.1 * -M 10.8 * ----- ----- Basin Index (%) 162 154 POWDER RIVER Bear Trap Meadow 8200 6.6 3.6 183 7.4 5.3 140 Cloud Peak Reservoir 9860 11.1 8.7 128 9.9 8.2 121 Grave Springs 8550 4.7 5.1 92 3.7 6.7 55 Hansen Sawmill 8360 5.4 4.0 135 6.7 5.2 129 Middle Powder 7760 6.2 6.6 94 -M 7.7 * Powder River Pass 9480 12.6 6.9 183 11.3 8.1 140 Soldier Park 8720 4.1 -M * 6.6 -M * ----- ----- Basin Index (%) 134 116 TONGUE RIVER Big Goose 7990 4.9 5.1 96 5.3 6.8 78 Bone Springs Div 9350 13.0 9.9 131 9.6 10.0 96 Burgess Junction 7880 6.2 7.0 89 5.2 7.8 67 Dome Lake 8880 9.0 7.2 125 7.6 8.7 87 Little Goose 8870 6.1 -M * 8.1 -M * Sucker Creek 8880 6.9 7.4 93 -M 9.0 * Tie Creek 6870 2.6 3.5 74 5.9 7.3 81 ----- ----- Basin Index (%) 106 83 BELLE FOURCHE Cole Canyon 5910 4.4 3.6 122 6.1 6.0 102 ----- ----- Basin Index (%) 122 102 CHEYENNE RIVER BASIN Blind Park 6890 5.3 5.1 104 7.6 8.1 94 North Rapid Creek 6130 5.0 4.6 109 5.4 6.5 83 ----- ----- Basin Index (%) 106 89 UPPER N. PLATTE Arapaho Ridge 10960 13.3 13.8 96 13.2 14.8 89 Blackhall Mtn 9820 17.6 -M * 17.8 -M * Columbine 9160 14.0 15.5 90 16.3 16.9 96 Divide Peak 8880 8.9 13.1 68 12.3 14.2 87 Joe Wright 10120 10.6 13.3 80 19.1 16.6 115 Laprele Creek 8375 4.5 5.7 79 5.8 7.8 74 Med Bow 10500 28.7 -M * 24.2 -M * North French Creek 10130 18.8 16.7 113 19.0 17.4 109 Never Summer 10280 11.8 13.0 91 9.8 -M * Old Battle 10000 16.7 20.1 83 16.2 23.3 70 Rawah 9020 6.9 6.6 105 10.2 9.4 109 Sage Creek Basin 7850 6.0 8.9 67 7.3 10.3 71 Sand Lake 10050 17.8 17.2 103 14.7 15.7 94 South Brush Creek 8440 6.6 7.6 87 8.1 9.9 82 Tower 10500 21.6 29.1 74 22.0 26.5 83 Webber Springs 9250 12.1 14.9 81 14.4 17.6 82 Willow Creek Pass 9540 8.6 8.0 108 9.4 8.6 109 Zirkel 9340 16.4 19.3 85 21.1 19.8 107 ----- ----- Basin Index (%) 87 91 SWEETWATER Deer Park 9700 7.7 9.5 81 9.7 12.8 76 Larsen Creek 9000 6.8 7.8 87 7.8 -M * South Pass 9040 7.6 9.7 78 -M 11.3 * ----- ----- Basin Index (%) 82 76* LOWER N. PLATTE Casper Mtn. 7900 5.4 8.0 68 -M 9.4 * Laprele Creek 8375 4.5 5.7 79 5.8 7.8 74 Reno Hill 8400 6.8 8.1 84 7.7 9.3 83 Windy Peak 7900 4.1 4.4 93 5.6 6.6 85 ----- ----- Basin Index (%) 79 81 LARAMIE RIVER Brooklyn Lake 10240 17.4 12.3 141 17.8 13.4 133 Cinnabar Park 9574 -M 13.8 * -M 16.8 * Crow Creek 8330 1.9 5.7 33 7.6 6.6 115 Deadman Hill 10220 13.0 10.6 123 12.7 10.6 120 Rawah 9020 6.9 6.6 105 10.2 9.4 109 Roach 9700 9.5 10.5 90 12.1 12.3 98 ----- ----- Basin Index (%) 107 115 S. PLATTE Black Mountain 8920 6.1 -M * 8.7 -M * Crow Creek 8330 1.9 5.7 33 7.6 6.6 115 Deadman Hill 10220 13.0 10.6 123 12.7 10.6 120 ----- ----- Basin Index (%) 91 118 LITTLE SNAKE RIVER Battle Mountain 7440 3.5 7.4 47 6.3 10.0 63 Divide Peak 8880 8.9 13.1 68 12.3 14.2 87 Elk River 8700 9.2 12.1 76 10.5 13.3 79 Little Snake River 8915 13.7 16.5 83 18.9 21.7 87 Old Battle 10000 16.7 20.1 83 16.2 23.3 70 Sage Creek Basin 7850 6.0 8.9 67 7.3 10.3 71 Sandstone RS 8150 5.6 8.5 66 5.5 12.4 44 Whiskey Park 8950 14.6 17.0 86 17.2 18.6 92 ----- ----- Basin Index (%) 75 76 UPPER GREEN RIVER Big Sandy Opening 9080 8.7 8.6 101 8.8 8.6 102 Blind Bull Sum 8650 23.5 14.7 160 14.2 13.3 107 East Rim Divide 7930 8.3 6.9 120 8.2 8.0 102 Elkhart Park G.S. 9400 8.5 7.8 109 8.0 8.8 91 Gros Ventre Summit 8750 9.6 8.6 112 9.3 8.5 109 Gunsight Pass 9820 10.8 8.6 126 11.0 9.2 120 Kendall R.S. 7740 10.0 8.0 125 10.7 9.6 111 Loomis Park 8240 11.5 9.9 116 12.3 11.7 105 New Fork Lake 8340 8.3 6.9 120 7.4 7.3 101 Pocket Creek 9360 6.2 -M * 5.9 -M * Snider Basin 8060 8.9 8.1 110 10.6 9.6 110 Spring Creek Divide 9000 18.0 15.3 118 17.3 16.0 108 Triple Peak 8500 20.0 13.8 145 21.9 16.6 132 ----- ----- Basin Index (%) 125 110 LOWER GREEN RIVER Blacks Fork Jct 8869 4.8 -M * 6.1 -M * Buck Pasture 9632 7.5 -M * 8.4 -M * EF Blacks Fork GS 9360 5.3 -M * 4.4 -M * Hams Fork 7840 5.7 7.6 75 6.1 7.6 80 Hewinta 9500 5.0 6.2 81 7.5 9.0 83 Hickerson Park 9122 4.6 4.0 115 3.8 6.4 59 Hole-in-Rock 9168 3.8 4.2 90 4.4 5.9 75 Indian Creek 9425 13.9 15.1 92 10.3 14.6 71 Kelley R.S. 8180 8.4 9.4 89 9.6 12.0 80 Spirit Lk 10235 4.9 -M * 5.7 -M * Steel Creek Park 10158 8.6 9.1 95 9.0 10.3 87 ----- ----- Basin Index (%) 90 77 UPPER BEAR RIVER Bear River RS 8777 5.8 -M * 7.1 -M * Bug Lake 7987 9.8 11.8 83 10.6 12.9 82 Burts Miller Ranch 8000 4.0 -M * 4.5 -M * Chalk Creek #1 9171 9.4 13.8 68 10.3 16.3 63 Hayden Fork 9130 8.1 9.1 89 10.2 13.6 75 Kelley R.S. 8180 8.4 9.4 89 9.6 12.0 80 Lily Lake 9133 7.0 7.6 92 7.4 11.1 67 Monte Cristo 8932 12.6 16.6 76 12.7 16.9 75 Salt River Summit 7640 6.8 8.3 82 8.6 11.0 78 ----- ----- Basin Index (%) 81 74 ----------------------------------------------------------------------------- -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.