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: MAY 23 , 2019 ------------------------------------------------------------------------------ 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 * 25.5 24.8 103 Black Bear 8170 39.0 32.3 121 51.6 45.0 115 Blind Bull Sum 8650 23.1 18.3 126 23.8 23.5 101 Cottonwood Creek 7670 9.6 3.4 282 32.9 30.4 108 East Rim Divide 7930 -M .0 * 16.0 14.4 111 Grand Targhee 9260 43.8 41.4 106 39.8 37.5 106 Granite Creek 6770 .2 .0 * 25.5 23.2 110 Grassy Lake 7265 -M 14.3 * -M 42.3 * Gros Ventre Summit 8750 .4 3.5 11 16.0 16.4 98 Gunsight Pass 9820 12.8 8.7 147 20.2 18.0 112 Lewis Lake Divide 7850 21.9 20.2 108 44.7 41.4 108 Phillips Bench 8200 19.9 16.7 119 38.1 33.3 114 Salt River Summit 7640 .0 .0 * 21.6 20.2 107 Snake River Station 6920 .1 .0 * 29.6 26.8 110 Spring Creek Divide 9000 21.3 18.3 116 29.2 28.4 103 Thumb Divide 7980 4.4 .3 1467* 23.4 23.1 101 Togwotee Pass 9580 24.2 22.7 107 30.7 30.1 102 Two Ocean Plateau 9240 28.5 27.9 102 31.0 33.3 93 Willow Creek 8080 19.1 13.6 140 43.7 41.3 106 Younts Peak 8350 -M 10.7 * -M 19.9 * ----- ----- Basin Index (%) 118 106 MADISON-GALLATIN Black Bear 8170 39.0 32.3 121 51.6 45.0 115 Canyon 7870 3.6 .6 600* 19.9 20.2 99 Madison Plateau 7750 20.5 12.9 159 34.1 32.0 107 West Yellowstone 6700 .1 .0 * 21.5 17.8 121 Whiskey Creek 6800 8.3 3.7 224 26.0 24.6 106 ----- ----- Basin Index (%) 144 110 YELLOWSTONE Beartooth Lake 9360 25.0 20.8 120 26.0 24.4 107 Burnt Mtn 5880 1.1 .0 * 23.5 19.7 119 Canyon 7870 3.6 .6 600* 19.9 20.2 99 Cole Creek 7850 20.5 14.7 139 -M 19.9 * Evening Star 9200 26.8 22.6 119 36.8 33.7 109 Fisher Creek 9100 35.3 31.9 111 43.4 38.8 112 Northeast Entrance 7350 .1 .0 * 18.4 15.9 116 Parker Peak 9400 24.8 19.2 129 30.3 22.8 133 Sylvan Lake 8420 14.0 13.7 102 32.9 28.1 117 Thumb Divide 7980 4.4 .3 1467* 23.4 23.1 101 Two Ocean Plateau 9240 28.5 27.9 102 31.0 33.3 93 White Mill 8700 24.2 21.4 113 26.1 29.3 89 Wolverine 7650 .0 .0 * 17.1 15.8 108 Younts Peak 8350 -M 10.7 * -M 19.9 * ----- ----- Basin Index (%) 120 108 WIND RIVER Burroughs Creek 8750 2.2 -M * 17.9 -M * Castle Creek 8400 .0 -M * 10.4 -M * Cold Springs 9630 1.4 .0 * 13.4 14.6 92 Deer Park 9700 13.7 9.1 151 24.6 26.3 94 Hobbs Park 10100 18.5 11.8 157 20.3 19.6 104 Kirwin 9550 7.1 7.0 101 16.0 16.2 99 Little Warm 9370 2.5 1.0 250* 11.2 17.7 63 Owl Creek 8975 1.4 .0 * 11.5 9.9 116 South Pass 9040 10.2 4.1 249 18.2 22.7 80 St. Lawrence Alt 8620 -M .0 * -M 13.7 * Togwotee Pass 9580 24.2 22.7 107 30.7 30.1 102 Townsend Creek 8700 7.4 .0 * 18.7 17.4 107 ----- ----- Basin Index (%) 155* 94 BIGHORN BASIN Bald Mtn. 9380 20.2 18.0 112 19.2 22.4 86 Bear Trap Meadow 8200 .6 .0 * 10.7 12.9 83 Bone Springs Div 9350 15.9 13.4 119 17.6 21.3 83 Grave Springs 8550 3.5 .3 1167* 13.0 15.2 86 Kirwin 9550 7.1 7.0 101 16.0 16.2 99 Marquette 8760 7.8 -M * 17.9 -M * Middle Powder 7760 1.2 2.6 46 14.6 16.5 88 Owl Creek 8975 1.4 .0 * 11.5 9.9 116 Powder River Pass 9480 3.1 3.2 97 -M 17.7 * Shell Creek 9580 15.9 14.4 110 16.2 18.9 86 Timber Creek 7950 2.5 .0 * 13.6 12.5 109 ----- ----- Basin Index (%) 121 91 SHOSHONE RIVER Blackwater 9780 28.0 23.6 119 32.5 26.3 124 Evening Star 9200 26.8 22.6 119 36.8 33.7 109 Marquette 8760 7.8 -M * 17.9 -M * Sylvan Lake 8420 14.0 13.7 102 32.9 28.1 117 Sylvan Road 7120 .1 .0 * 19.2 20.6 93 Younts Peak 8350 -M 10.7 * -M 19.9 * ----- ----- Basin Index (%) 115 112 POWDER RIVER Bear Trap Meadow 8200 .6 .0 * 10.7 12.9 83 Cloud Peak Reservoir 9860 13.7 13.2 104 17.8 20.0 89 Grave Springs 8550 3.5 .3 1167* 13.0 15.2 86 Hansen Sawmill 8360 1.8 .0 * 13.5 13.3 102 Middle Powder 7760 1.2 2.6 46 14.6 16.5 88 Powder River Pass 9480 3.1 3.2 97 -M 17.7 * Soldier Park 8720 1.5 -M * 11.9 -M * ----- ----- Basin Index (%) 124* 89 TONGUE RIVER Big Goose 7990 -M 2.1 * -M 17.5 * Bone Springs Div 9350 15.9 13.4 119 17.6 21.3 83 Burgess Junction 7880 7.4 6.2 119 14.6 17.3 84 Dome Lake 8880 8.8 4.0 220 17.4 19.4 90 Little Goose 8870 11.4 -M * 13.7 -M * Sucker Creek 8880 -M 7.0 * -M 20.6 * Tie Creek 6870 -M .0 * 18.8 17.6 107 ----- ----- Basin Index (%) 136* 90 BELLE FOURCHE Blind Park 6890 .6 .0 * 11.1 17.2 65 Cole Canyon 5910 2.4 .0 * 20.4 15.1 135 ----- ----- Basin Index (%) * 98 CHEYENNE RIVER BASIN Blind Park 6890 .6 .0 * 11.1 17.2 65 North Rapid Creek 6130 .6 .0 * 11.7 14.9 79 ----- ----- Basin Index (%) * 71 UPPER N. PLATTE Arapaho Ridge 10960 25.5 15.5 165 33.1 28.7 115 Blackhall Mtn 9820 29.0 -M * 40.0 -M * Columbine 9160 9.1 .1 9100* 34.9 30.8 113 Divide Peak 8880 6.0 3.0 200 28.8 26.7 108 Joe Wright 10120 22.1 19.7 112 37.0 33.2 111 Laprele Creek 8375 .8 .0 * 18.7 17.1 109 Med Bow 10500 40.6 -M * 42.8 -M * Never Summer 10280 24.9 18.8 132 24.9 -M * North French Creek 10130 29.2 27.5 106 36.7 34.1 108 Old Battle 10000 39.5 31.3 126 43.9 42.4 104 Rawah 9020 .9 .1 900* 21.5 19.1 113 Sage Creek Basin 7850 -M .0 * 19.8 17.5 113 Sand Lake 10050 30.9 26.4 117 30.9 32.2 96 South Brush Creek 8440 .0 .0 * 15.9 20.4 78 Tower 10500 57.2 46.4 123 55.7 48.2 116 Webber Springs 9250 17.4 8.8 198 37.8 32.3 117 Whiskey Park 8950 -M 18.8 * -M 34.0 * Willow Creek Pass 9540 14.3 7.5 191 22.0 17.6 125 Zirkel 9340 17.6 5.0 352 44.8 33.5 134 ----- ----- Basin Index (%) 141 111 SWEETWATER Deer Park 9700 13.7 9.1 151 24.6 26.3 94 Larsen Creek 9000 .0 2.7 0 17.5 -M * South Pass 9040 10.2 4.1 249 18.2 22.7 80 ----- ----- Basin Index (%) 150 87 LOWER N. PLATTE Casper Mtn. 7900 8.1 2.2 368 19.9 20.7 96 Laprele Creek 8375 .8 .0 * 18.7 17.1 109 Reno Hill 8400 11.3 .8 1412* 24.8 21.6 115 Windy Peak 7900 .8 .0 * 14.2 15.1 94 ----- ----- Basin Index (%) 700* 104 LARAMIE RIVER Brooklyn Lake 10240 18.8 13.8 136 32.4 27.5 118 Cinnabar Park 9574 14.3 9.5 151 29.3 29.8 98 Crow Creek 8330 -M .0 * 14.9 15.5 96 Deadman Hill 10220 17.8 14.6 122 24.8 23.3 106 Rawah 9020 .9 .1 900* 21.5 19.1 113 Roach 9700 10.7 9.2 116 27.9 24.9 112 Windy Peak 7900 .8 .0 * 14.2 15.1 94 ----- ----- Basin Index (%) 134 106 S. PLATTE Black Mountain 8920 .8 -M * 18.6 -M * Crow Creek 8330 -M .0 * 14.9 15.5 96 Deadman Hill 10220 17.8 14.6 122 24.8 23.3 106 ----- ----- Basin Index (%) 122* 102 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 21.0 18.7 112 Divide Peak 8880 6.0 3.0 200 28.8 26.7 108 Elk River 8700 1.4 .0 * 24.3 24.8 98 Little Snake River 8915 18.1 9.9 183 44.5 35.4 126 Old Battle 10000 39.5 31.3 126 43.9 42.4 104 Sage Creek Basin 7850 -M .0 * 19.8 17.5 113 Sandstone RS 8150 -M .0 * 22.4 22.7 99 Whiskey Park 8950 -M 18.8 * -M 34.0 * ----- ----- Basin Index (%) 147* 109 UPPER GREEN RIVER Big Sandy Opening 9080 7.6 .4 1900* 18.9 17.1 111 Blind Bull Sum 8650 23.1 18.3 126 23.8 23.5 101 East Rim Divide 7930 -M .0 * 16.0 14.4 111 Elkhart Park G.S. 9400 10.3 4.2 245 18.7 17.1 109 Gros Ventre Summit 8750 .4 3.5 11 16.0 16.4 98 Gunsight Pass 9820 12.8 8.7 147 20.2 18.0 112 Indian Creek 9425 19.7 16.3 121 24.7 27.3 90 Kendall R.S. 7740 .1 .0 * 15.3 17.0 90 Loomis Park 8240 4.9 .5 980* 21.7 20.8 104 New Fork Lake 8340 .3 .0 * 14.3 13.8 104 Pocket Creek 9360 10.3 -M * 18.4 -M * Snider Basin 8060 .0 .0 * 17.2 17.0 101 Spring Creek Divide 9000 21.3 18.3 116 29.2 28.4 103 Triple Peak 8500 13.0 5.5 236 32.1 30.6 105 ----- ----- Basin Index (%) 150 103 LOWER GREEN RIVER Blacks Fork Jct 8869 .1 -M * 17.0 -M * Buck Pasture 9632 8.9 -M * 26.4 -M * EF Blacks Fork GS 9360 .7 -M * 17.2 -M * Hams Fork 7840 .0 .0 * 17.1 14.7 116 Hewinta 9500 .0 .0 * 19.7 17.9 110 Hickerson Park 9122 1.0 .0 * 16.7 13.7 122 Hole-in-Rock 9168 .9 .0 * 16.1 13.3 121 Indian Creek 9425 19.7 16.3 121 24.7 27.3 90 Kelley R.S. 8180 4.6 .7 657* 22.0 22.1 100 Spirit Lk 10235 13.2 -M * 23.3 -M * Steel Creek Park 10158 15.9 13.3 120 25.0 21.3 117 ----- ----- Basin Index (%) 139* 108 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 19.5 -M * Bug Lake 7987 9.8 1.2 817* 29.9 23.8 126 Burts Miller Ranch 8000 .0 -M * 10.8 -M * Chalk Creek #1 9171 18.6 12.8 145 36.2 31.1 116 Hayden Fork 9130 .1 .0 * 29.1 26.1 111 Kelley R.S. 8180 4.6 .7 657* 22.0 22.1 100 Lily Lake 9133 .6 .0 * 21.2 21.6 98 Monte Cristo 8932 27.8 11.9 234 40.1 32.0 125 Salt River Summit 7640 .0 .0 * 21.6 20.2 107 Spring Creek Divide 9000 21.3 18.3 116 29.2 28.4 103 ----- ----- Basin Index (%) 184* 112 ----------------------------------------------------------------------------- -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.