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: MAY 28 , 2018 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 .0 .0 * 27.7 25.3 109 Black Bear 8170 35.5 29.0 122 49.6 45.7 109 Blind Bull Sum 8650 -M 15.0 * 26.3 24.0 110 Cottonwood Creek 7670 .0 .0 * 33.4 31.0 108 East Rim Divide 7930 .0 .0 * 16.8 14.8 114 Grand Targhee 9260 41.1 41.0 100 44.2 38.2 116 Granite Creek 6770 .0 .0 * 28.2 23.7 119 Grassy Lake 7265 3.4 9.4 36 43.8 43.1 102 Gros Ventre Summit 8750 -M .4 * 19.7 16.7 118 Gunsight Pass 9820 9.4 5.2 181 22.8 18.3 125 Lewis Lake Divide 7850 17.4 15.7 111 47.7 42.2 113 Phillips Bench 8200 12.4 12.8 97 36.2 33.8 107 Salt River Summit 7640 .0 .0 * 16.2 20.5 79 Snake River Station 6920 .0 .0 * 29.5 27.3 108 Spring Creek Divide 9000 14.5 14.3 101 30.4 28.8 106 Thumb Divide 7980 .0 .0 * 23.9 23.5 102 Togwotee Pass 9580 25.3 21.2 119 41.4 30.7 135 Two Ocean Plateau 9240 30.0 27.0 111 37.4 33.9 110 Willow Creek 8080 4.5 7.5 60 45.3 42.0 108 Younts Peak 8350 -M 7.4 * -M 20.3 * ----- ----- Basin Index (%) 106 110 MADISON-GALLATIN Black Bear 8170 35.5 29.0 122 49.6 45.7 109 Canyon 7870 .0 .0 * 24.1 20.6 117 Madison Plateau 7750 11.9 9.8 121 35.6 32.6 109 West Yellowstone 6700 -M .0 * -M 18.1 * Whiskey Creek 6800 .0 .3 0* 26.5 25.2 105 ----- ----- Basin Index (%) 121* 109 YELLOWSTONE Beartooth Lake 9360 38.4 19.4 198 40.9 24.9 164 Burnt Mtn 5880 .0 .0 * 22.6 20.5 110 Canyon 7870 .0 .0 * 24.1 20.6 117 Cole Creek 7850 4.0 12.0 33 21.6 20.8 104 Evening Star 9200 30.8 20.4 151 51.9 34.5 150 Fisher Creek 9100 44.3 29.7 149 54.1 39.5 137 Northeast Entrance 7350 .0 .0 * 22.5 16.3 138 Parker Peak 9400 20.5 16.7 123 36.3 23.4 155 Sylvan Lake 8420 3.8 10.6 36 34.8 28.8 121 Thumb Divide 7980 .0 .0 * 23.9 23.5 102 Two Ocean Plateau 9240 30.0 27.0 111 37.4 33.9 110 White Mill 8700 29.5 19.5 151 37.4 29.9 125 Wolverine 7650 .0 .0 * 25.5 16.2 157 ----- ----- Basin Index (%) 130 130 WIND RIVER Burroughs Creek 8750 .0 -M * 24.0 -M * Castle Creek 8400 .0 -M * 15.5 -M * Cold Springs 9630 .0 .0 * 14.6 15.1 97 Deer Park 9700 .9 6.3 14 21.8 26.8 81 Hobbs Park 10100 7.1 8.8 81 21.0 20.1 104 Kirwin 9550 5.8 4.3 135 24.6 16.6 148 Little Warm 9370 .0 .0 * 22.1 18.1 122 Owl Creek 8975 .0 .0 * 12.8 10.4 123 South Pass 9040 .1 1.1 9* 14.2 23.3 61 St. Lawrence Alt 8620 .0 .0 * 13.4 14.2 94 Togwotee Pass 9580 25.3 21.2 119 41.4 30.7 135 Townsend Creek 8700 .0 .0 * 15.5 17.9 87 ----- ----- Basin Index (%) 94* 104 BIGHORN BASIN Bald Mtn. 9380 10.4 15.8 66 21.5 23.1 93 Bear Trap Meadow 8200 .0 .0 * 14.1 13.6 104 Bone Springs Div 9350 5.4 11.4 47 20.7 21.9 95 Grave Springs 8550 .0 .0 * 10.4 15.9 65 Kirwin 9550 5.8 4.3 135 24.6 16.6 148 Marquette 8760 .0 -M * 18.3 -M * Middle Powder 7760 .0 .0 * 10.4 17.1 61 Owl Creek 8975 .0 .0 * 12.8 10.4 123 Powder River Pass 9480 .2 .0 * 20.7 18.3 113 Shell Creek 9580 10.1 11.9 85 20.4 19.6 104 Timber Creek 7950 .0 .0 * 8.2 13.1 63 ----- ----- Basin Index (%) 74* 97 SHOSHONE RIVER Blackwater 9780 29.2 22.3 131 38.2 27.0 141 Evening Star 9200 30.8 20.4 151 51.9 34.5 150 Marquette 8760 .0 -M * 18.3 -M * Sylvan Road 7120 .1 .0 * 26.6 21.1 126 Younts Peak 8350 -M 7.4 * -M 20.3 * ----- ----- Basin Index (%) 141* 141 POWDER RIVER Bear Trap Meadow 8200 .0 .0 * 14.1 13.6 104 Cloud Peak Reservoir 9860 3.2 9.4 34 22.4 20.8 108 Grave Springs 8550 .0 .0 * 10.4 15.9 65 Hansen Sawmill 8360 .0 .0 * 17.0 13.8 123 Middle Powder 7760 .0 .0 * 10.4 17.1 61 Powder River Pass 9480 .2 .0 * 20.7 18.3 113 Soldier Park 8720 .1 -M * 16.1 -M * ----- ----- Basin Index (%) 36* 95 TONGUE RIVER Big Goose 7990 .0 .0 * 13.9 18.0 77 Bone Springs Div 9350 5.4 11.4 47 20.7 21.9 95 Burgess Junction 7880 .0 2.2 0 15.1 17.8 85 Dome Lake 8880 .2 .0 * 19.3 20.0 96 Little Goose 8870 .0 -M * 17.7 -M * Sucker Creek 8880 .0 3.2 0 15.6 21.1 74 Tie Creek 6870 .1 .0 * 14.6 18.3 80 ----- ----- Basin Index (%) 34* 85 BELLE FOURCHE Cole Canyon 5910 .1 .0 * 14.2 16.0 89 ----- ----- Basin Index (%) * 89 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 15.5 17.9 87 North Rapid Creek 6130 -M .0 * 13.9 15.5 90 ----- ----- Basin Index (%) * 88 UPPER N. PLATTE Arapaho Ridge 10960 6.2 11.1 56 25.9 29.0 89 Blackhall Mtn 9820 1.1 -M * 31.0 -M * Columbine 9160 -M .0 * 30.2 31.2 97 Divide Peak 8880 .0 .0 * 21.2 27.1 78 Joe Wright 10120 7.6 16.4 46 35.7 33.9 105 Laprele Creek 8375 .1 .0 * 11.7 17.6 66 Med Bow 10500 23.4 -M * 39.9 -M * North French Creek 10130 11.6 24.0 48 32.5 34.7 94 Never Summer 10280 12.5 17.0 74 21.4 -M * Old Battle 10000 12.4 27.3 45 27.8 43.2 64 Rawah 9020 .2 .0 * 18.7 19.3 97 Sage Creek Basin 7850 -M .0 * 12.2 17.7 69 Sand Lake 10050 17.0 22.8 75 28.3 32.7 87 South Brush Creek 8440 .0 .0 * 14.4 20.8 69 Tower 10500 22.2 41.4 54 43.1 48.8 88 Webber Springs 9250 .0 2.7 0 24.4 32.7 75 Willow Creek Pass 9540 .2 3.0 7 17.4 18.1 96 Zirkel 9340 .0 .0 * 35.5 33.8 105 ----- ----- Basin Index (%) 54 86 SWEETWATER Deer Park 9700 .9 6.3 14 21.8 26.8 81 Larsen Creek 9000 .1 1.2 8* 15.6 -M * South Pass 9040 .1 1.1 9* 14.2 23.3 61 ----- ----- Basin Index (%) 13* 72 LOWER N. PLATTE Casper Mtn. 7900 .0 .1 0* 10.9 21.4 51 Laprele Creek 8375 .1 .0 * 11.7 17.6 66 Reno Hill 8400 .0 .0 * 16.1 22.3 72 Windy Peak 7900 .1 .0 * 13.5 15.8 85 ----- ----- Basin Index (%) 200* 68 LARAMIE RIVER Brooklyn Lake 10240 .6 9.0 7 30.6 28.0 109 Cinnabar Park 9574 -M 4.6 * 28.4 30.0 95 Crow Creek 8330 .0 .0 * 15.6 15.9 98 Deadman Hill 10220 .2 11.0 2 24.1 23.7 102 Rawah 9020 .2 .0 * 18.7 19.3 97 Roach 9700 .1 4.7 2 21.3 25.4 84 ----- ----- Basin Index (%) 4 97 S. PLATTE Black Mountain 8920 -M -M * 17.2 -M * Crow Creek 8330 .0 .0 * 15.6 15.9 98 Deadman Hill 10220 .2 11.0 2 24.1 23.7 102 ----- ----- Basin Index (%) 2* 100 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 13.9 19.0 73 Divide Peak 8880 .0 .0 * 21.2 27.1 78 Elk River 8700 .0 .0 * 19.6 25.2 78 Little Snake River 8915 .0 5.0 0 31.6 35.8 88 Old Battle 10000 12.4 27.3 45 27.8 43.2 64 Sage Creek Basin 7850 -M .0 * 12.2 17.7 69 Sandstone RS 8150 -M .0 * 12.2 23.0 53 Whiskey Park 8950 .1 11.7 1 29.4 34.5 85 ----- ----- Basin Index (%) 28* 74 UPPER GREEN RIVER Big Sandy Opening 9080 -M .0 * 17.2 17.6 98 Blind Bull Sum 8650 -M 15.0 * 26.3 24.0 110 East Rim Divide 7930 .0 .0 * 16.8 14.8 114 Elkhart Park G.S. 9400 .1 1.5 7 16.7 17.5 95 Gros Ventre Summit 8750 -M .4 * 19.7 16.7 118 Gunsight Pass 9820 9.4 5.2 181 22.8 18.3 125 Kendall R.S. 7740 .0 .0 * 20.1 17.4 116 Loomis Park 8240 .2 .0 * 23.2 21.2 109 New Fork Lake 8340 .0 .0 * 16.3 14.2 115 Pocket Creek 9360 -M -M * 11.8 -M * Snider Basin 8060 .0 .0 * 18.2 17.3 105 Spring Creek Divide 9000 14.5 14.3 101 30.4 28.8 106 Triple Peak 8500 5.3 .7 757* 38.5 31.1 124 ----- ----- Basin Index (%) 136* 111 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 -M * 12.4 -M * Buck Pasture 9632 .0 -M * 18.8 -M * EF Blacks Fork GS 9360 .0 -M * 13.4 -M * Hams Fork 7840 .0 .0 * 14.3 15.0 95 Hewinta 9500 .0 .0 * 15.5 18.3 85 Hickerson Park 9122 .4 .0 * 12.8 14.1 91 Hole-in-Rock 9168 .0 .0 * 13.5 13.7 99 Indian Creek 9425 6.1 13.0 47 21.4 27.7 77 Kelley R.S. 8180 .0 .0 * 19.3 22.5 86 Spirit Lk 10235 .8 -M * 17.0 -M * Steel Creek Park 10158 1.7 10.9 16 19.6 21.7 90 ----- ----- Basin Index (%) 34* 88 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 14.0 -M * Bug Lake 7987 .0 .0 * 20.3 24.2 84 Burts Miller Ranch 8000 .0 -M * 7.8 -M * Chalk Creek #1 9171 .0 8.8 0 20.1 31.7 63 Hayden Fork 9130 .1 .0 * 20.6 26.5 78 Kelley R.S. 8180 .0 .0 * 19.3 22.5 86 Lily Lake 9133 .0 .0 * 15.2 22.1 69 Monte Cristo 8932 .4 7.1 6 27.1 32.4 84 Salt River Summit 7640 .0 .0 * 16.2 20.5 79 ----- ----- Basin Index (%) 3* 77 ----------------------------------------------------------------------------- -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.