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 MONDAY: FEBRUARY 26 , 2018 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 15.3 13.3 115 16.7 17.0 98 Black Bear 8170 34.5 28.9 119 32.4 30.3 107 Blind Bull Sum 8650 26.0 17.5 149 15.5 15.7 99 Cottonwood Creek 7670 17.3 16.3 106 18.9 19.2 98 East Rim Divide 7930 9.6 7.8 123 9.6 9.4 102 Grand Targhee 9260 36.4 29.2 125 23.9 24.5 98 Granite Creek 6770 14.5 13.4 108 16.5 16.2 102 Grassy Lake 7265 25.3 25.6 99 28.5 29.1 98 Gros Ventre Summit 8750 10.6 9.5 112 10.7 9.9 108 Gunsight Pass 9820 12.2 10.4 117 12.2 10.6 115 Lewis Lake Divide 7850 31.0 25.1 124 -M 28.4 * Phillips Bench 8200 19.4 19.3 101 20.5 22.4 92 Salt River Summit 7640 7.9 10.4 76 9.6 13.3 72 Snake River Station 6920 15.2 14.0 109 19.3 18.4 105 Spring Creek Divide 9000 20.5 18.0 114 19.4 19.0 102 Thumb Divide 7980 14.8 11.8 125 15.0 14.4 104 Togwotee Pass 9580 24.5 17.4 141 25.0 19.1 131 Two Ocean Plateau 9240 31.1 21.3 146 -M 21.4 * Willow Creek 8080 25.4 21.9 116 27.6 26.4 105 Younts Peak 8350 -M 11.5 * -M 12.4 * ----- ----- Basin Index (%) 118 102 MADISON-GALLATIN Black Bear 8170 34.5 28.9 119 32.4 30.3 107 Canyon 7870 14.5 10.3 141 16.3 12.8 127 Madison Plateau 7750 21.9 17.5 125 21.8 20.8 105 West Yellowstone 6700 11.3 8.7 130 14.0 11.4 123 Whiskey Creek 6800 13.0 11.8 110 15.1 16.0 94 ----- ----- Basin Index (%) 123 109 YELLOWSTONE Beartooth Lake 9360 33.7 16.2 208 28.9 15.5 186 Burnt Mtn 5880 6.1 4.0 152 12.4 9.2 135 Canyon 7870 14.5 10.3 141 16.3 12.8 127 Cole Creek 7850 11.6 9.3 125 7.8 8.9 88 Evening Star 9200 34.5 18.9 183 30.9 21.8 142 Fisher Creek 9100 44.2 25.2 175 38.3 25.1 153 Northeast Entrance 7350 12.6 7.8 162 15.5 9.8 158 Parker Peak 9400 28.1 15.6 180 22.6 13.8 164 Sylvan Lake 8420 20.1 15.6 129 21.6 17.7 122 Thumb Divide 7980 14.8 11.8 125 15.0 14.4 104 Two Ocean Plateau 9240 31.1 21.3 146 -M 21.4 * White Mill 8700 35.4 18.0 197 25.9 18.7 139 Wolverine 7650 18.5 8.5 218 17.7 9.8 181 ----- ----- Basin Index (%) 167 142 WIND RIVER Burroughs Creek 8750 13.6 -M * 15.4 -M * Castle Creek 8400 7.4 -M * 8.6 -M * Cold Springs 9630 7.6 5.4 141 8.3 7.3 114 Deer Park 9700 8.1 10.7 76 10.7 14.9 72 Hobbs Park 10100 13.0 9.3 140 11.2 9.3 120 Kirwin 9550 16.3 6.8 240 14.7 8.6 171 Little Warm 9370 12.8 7.8 164 13.3 9.7 137 Owl Creek 8975 3.4 3.8 89 5.1 4.2 121 South Pass 9040 8.3 11.1 75 -M 13.2 * St. Lawrence Alt 8620 2.8 5.0 56 7.0 6.3 111 Togwotee Pass 9580 24.5 17.4 141 25.0 19.1 131 Townsend Creek 8700 5.9 6.3 94 7.0 8.5 82 ----- ----- Basin Index (%) 123 116 BIGHORN BASIN Bald Mtn. 9380 17.2 14.3 120 12.0 12.8 94 Bear Trap Meadow 8200 -M 4.2 * 8.5 6.0 142 Bone Springs Div 9350 15.5 11.6 134 11.6 11.4 102 Grave Springs 8550 5.3 6.5 82 4.4 7.7 57 Kirwin 9550 16.3 6.8 240 14.7 8.6 171 Marquette 8760 4.4 -M * 8.1 -M * Middle Powder 7760 6.9 7.8 88 -M 8.6 * Owl Creek 8975 3.4 3.8 89 5.1 4.2 121 Powder River Pass 9480 14.1 7.7 183 12.7 9.4 135 Shell Creek 9580 17.4 11.2 155 13.2 10.3 128 Timber Creek 7950 2.7 3.2 84 -M 5.1 * ----- ----- Basin Index (%) 136 117 SHOSHONE RIVER Blackwater 9780 28.4 16.8 169 26.2 15.8 166 Evening Star 9200 34.5 18.9 183 30.9 21.8 142 Marquette 8760 4.4 -M * 8.1 -M * Sylvan Road 7120 12.9 9.1 142 18.0 13.7 131 Younts Peak 8350 -M 11.5 * -M 12.4 * ----- ----- Basin Index (%) 169 146 POWDER RIVER Bear Trap Meadow 8200 -M 4.2 * 8.5 6.0 142 Cloud Peak Reservoir 9860 12.7 10.2 125 11.1 9.3 119 Grave Springs 8550 5.3 6.5 82 4.4 7.7 57 Hansen Sawmill 8360 6.6 4.6 143 8.0 5.9 136 Middle Powder 7760 6.9 7.8 88 -M 8.6 * Powder River Pass 9480 14.1 7.7 183 12.7 9.4 135 Soldier Park 8720 5.1 -M * 7.6 -M * ----- ----- Basin Index (%) 124 117 TONGUE RIVER Big Goose 7990 6.0 6.1 98 6.5 7.7 84 Bone Springs Div 9350 15.5 11.6 134 11.6 11.4 102 Burgess Junction 7880 7.4 8.0 92 6.7 8.8 76 Dome Lake 8880 11.8 8.4 140 9.3 9.8 95 Little Goose 8870 7.2 -M * 9.2 -M * Sucker Creek 8880 8.2 8.7 94 6.2 10.3 60 Tie Creek 6870 3.5 4.2 83 6.9 8.1 85 ----- ----- Basin Index (%) 111 84 BELLE FOURCHE Cole Canyon 5910 5.4 4.9 110 7.5 7.0 107 ----- ----- Basin Index (%) 110 107 CHEYENNE RIVER BASIN Blind Park 6890 6.9 6.2 111 9.3 9.2 101 North Rapid Creek 6130 6.4 5.8 110 6.9 7.4 93 ----- ----- Basin Index (%) 111 98 UPPER N. PLATTE Arapaho Ridge 10960 15.9 16.1 99 15.5 17.3 90 Blackhall Mtn 9820 22.2 -M * 21.7 -M * Columbine 9160 18.1 19.3 94 16.2 20.0 81 Divide Peak 8880 10.9 15.3 71 14.5 16.5 88 Joe Wright 10120 13.2 16.0 82 22.1 19.6 113 Laprele Creek 8375 5.3 7.5 71 6.8 9.2 74 Med Bow 10500 32.6 -M * 26.7 -M * North French Creek 10130 21.7 20.6 105 21.5 20.7 104 Never Summer 10280 14.3 15.8 91 11.5 -M * Old Battle 10000 20.5 23.6 87 19.5 27.4 71 Rawah 9020 9.0 8.4 107 12.0 10.6 113 Sage Creek Basin 7850 7.5 10.5 71 8.2 11.5 71 Sand Lake 10050 20.9 20.7 101 17.6 18.6 95 South Brush Creek 8440 7.9 9.9 80 9.3 11.5 81 Tower 10500 27.1 35.6 76 23.3 31.2 75 Webber Springs 9250 15.2 18.3 83 17.8 20.8 86 Willow Creek Pass 9540 10.6 9.2 115 11.1 10.1 110 Zirkel 9340 21.2 22.6 94 25.6 23.0 111 ----- ----- Basin Index (%) 89 90 SWEETWATER Deer Park 9700 8.1 10.7 76 10.7 14.9 72 Larsen Creek 9000 8.2 9.3 88 8.4 -M * South Pass 9040 8.3 11.1 75 -M 13.2 * ----- ----- Basin Index (%) 79 72* LOWER N. PLATTE Casper Mtn. 7900 6.3 9.8 64 5.0 10.9 46 Laprele Creek 8375 5.3 7.5 71 6.8 9.2 74 Reno Hill 8400 7.5 9.6 78 8.6 10.9 79 Windy Peak 7900 4.9 5.7 86 6.3 7.7 82 ----- ----- Basin Index (%) 74 69 LARAMIE RIVER Brooklyn Lake 10240 19.7 14.7 134 20.3 15.8 128 Cinnabar Park 9574 18.3 16.7 110 20.5 19.4 106 Crow Creek 8330 -M 6.6 * 8.2 7.7 106 Deadman Hill 10220 15.8 12.3 128 15.2 12.5 122 Rawah 9020 9.0 8.4 107 12.0 10.6 113 Roach 9700 11.3 12.2 93 14.2 14.4 99 ----- ----- Basin Index (%) 115 112 S. PLATTE Black Mountain 8920 7.5 -M * 10.2 -M * Crow Creek 8330 -M 6.6 * 8.2 7.7 106 Deadman Hill 10220 15.8 12.3 128 15.2 12.5 122 ----- ----- Basin Index (%) 128* 116 LITTLE SNAKE RIVER Battle Mountain 7440 5.5 9.7 57 -M 11.9 * Divide Peak 8880 10.9 15.3 71 14.5 16.5 88 Elk River 8700 12.2 14.9 82 13.1 15.7 83 Little Snake River 8915 17.3 19.5 89 22.7 24.7 92 Old Battle 10000 20.5 23.6 87 19.5 27.4 71 Sage Creek Basin 7850 7.5 10.5 71 8.2 11.5 71 Sandstone RS 8150 7.5 10.3 73 6.7 14.9 45 Whiskey Park 8950 18.8 20.8 90 20.7 22.0 94 ----- ----- Basin Index (%) 80 79 UPPER GREEN RIVER Big Sandy Opening 9080 9.5 9.8 97 9.4 10.3 91 Blind Bull Sum 8650 26.0 17.5 149 15.5 15.7 99 East Rim Divide 7930 9.6 7.8 123 9.6 9.4 102 Elkhart Park G.S. 9400 9.5 9.2 103 9.1 10.3 88 Gros Ventre Summit 8750 10.6 9.5 112 10.7 9.9 108 Gunsight Pass 9820 12.2 10.4 117 12.2 10.6 115 Kendall R.S. 7740 12.1 9.6 126 12.5 11.5 109 Loomis Park 8240 13.7 11.5 119 14.5 13.8 105 New Fork Lake 8340 9.6 8.0 120 8.9 8.6 103 Pocket Creek 9360 6.4 -M * 6.3 -M * Snider Basin 8060 10.2 9.4 109 11.9 11.3 105 Spring Creek Divide 9000 20.5 18.0 114 19.4 19.0 102 Triple Peak 8500 22.7 16.5 138 24.6 19.9 124 ----- ----- Basin Index (%) 121 105 LOWER GREEN RIVER Blacks Fork Jct 8869 5.7 -M * 7.1 -M * Buck Pasture 9632 8.7 -M * 9.8 -M * EF Blacks Fork GS 9360 7.0 -M * 4.2 -M * Hams Fork 7840 7.2 9.0 80 7.2 9.0 80 Hewinta 9500 6.0 7.6 79 8.7 10.6 82 Hickerson Park 9122 5.8 5.6 104 5.2 7.4 70 Hole-in-Rock 9168 4.9 5.4 91 5.5 6.9 80 Indian Creek 9425 15.9 18.3 87 11.5 17.5 66 Kelley R.S. 8180 9.7 11.7 83 11.0 14.4 76 Spirit Lk 10235 6.3 -M * 7.4 -M * Steel Creek Park 10158 10.1 11.2 90 10.5 12.1 87 ----- ----- Basin Index (%) 87 77 UPPER BEAR RIVER Bear River RS 8777 6.9 -M * 8.3 -M * Bug Lake 7987 12.2 14.4 85 12.5 15.2 82 Burts Miller Ranch 8000 4.1 -M * 5.1 -M * Chalk Creek #1 9171 11.0 17.8 62 12.2 19.1 64 Hayden Fork 9130 9.3 11.7 79 11.9 16.1 74 Kelley R.S. 8180 9.7 11.7 83 11.0 14.4 76 Lily Lake 9133 8.1 9.9 82 8.8 13.0 68 Monte Cristo 8932 15.4 20.2 76 15.2 20.2 75 Salt River Summit 7640 7.9 10.4 76 9.6 13.3 72 ----- ----- Basin Index (%) 77 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.