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 TUESDAY: MAY 28 , 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 * 26.2 25.3 104 Black Bear 8170 39.6 29.0 137 53.2 45.7 116 Blind Bull Sum 8650 23.0 15.0 153 24.9 24.0 104 Cottonwood Creek 7670 7.9 .0 * 34.0 31.0 110 East Rim Divide 7930 .0 .0 * 17.1 14.8 116 Grand Targhee 9260 46.2 41.0 113 41.5 38.2 109 Granite Creek 6770 .2 .0 * 26.7 23.7 113 Grassy Lake 7265 -M 9.4 * -M 43.1 * Gros Ventre Summit 8750 .0 .4 0* 16.5 16.7 99 Gunsight Pass 9820 13.0 5.2 250 20.6 18.3 113 Lewis Lake Divide 7850 20.5 15.7 131 45.6 42.2 108 Phillips Bench 8200 19.5 12.8 152 39.0 33.8 115 Salt River Summit 7640 .0 .0 * 22.4 20.5 109 Snake River Station 6920 .0 .0 * 30.5 27.3 112 Spring Creek Divide 9000 21.5 14.3 150 30.0 28.8 104 Thumb Divide 7980 2.3 .0 * 24.0 23.5 102 Togwotee Pass 9580 25.1 21.2 118 31.7 30.7 103 Two Ocean Plateau 9240 29.1 27.0 108 31.7 33.9 94 Willow Creek 8080 18.5 7.5 247 45.2 42.0 108 Younts Peak 8350 -M 7.4 * -M 20.3 * ----- ----- Basin Index (%) 141 108 MADISON-GALLATIN Black Bear 8170 39.6 29.0 137 53.2 45.7 116 Canyon 7870 1.1 .0 * 20.4 20.6 99 Madison Plateau 7750 19.1 9.8 195 35.4 32.6 109 West Yellowstone 6700 .1 .0 * 22.0 18.1 122 Whiskey Creek 6800 5.9 .3 1967* 26.6 25.2 106 ----- ----- Basin Index (%) 168* 111 YELLOWSTONE Beartooth Lake 9360 25.7 19.4 132 26.9 24.9 108 Burnt Mtn 5880 .1 .0 * -M 20.5 * Canyon 7870 1.1 .0 * 20.4 20.6 99 Cole Creek 7850 21.2 12.0 177 23.4 20.8 112 Evening Star 9200 28.0 20.4 137 38.7 34.5 112 Fisher Creek 9100 34.8 29.7 117 44.4 39.5 112 Northeast Entrance 7350 .1 .0 * 19.1 16.3 117 Parker Peak 9400 26.5 16.7 159 31.7 23.4 135 Sylvan Lake 8420 13.8 10.6 130 34.0 28.8 118 Thumb Divide 7980 2.3 .0 * 24.0 23.5 102 Two Ocean Plateau 9240 29.1 27.0 108 31.7 33.9 94 White Mill 8700 24.2 19.5 124 27.1 29.9 91 Wolverine 7650 .0 .0 * 18.4 16.2 114 Younts Peak 8350 -M 7.4 * -M 20.3 * ----- ----- Basin Index (%) 133 109 WIND RIVER Burroughs Creek 8750 2.7 -M * 19.2 -M * Castle Creek 8400 .7 -M * 12.0 -M * Cold Springs 9630 2.6 .0 * 15.1 15.1 100 Deer Park 9700 14.4 6.3 229 26.0 26.8 97 Hobbs Park 10100 20.4 8.8 232 22.2 20.1 110 Kirwin 9550 -M 4.3 * 18.2 16.6 110 Little Warm 9370 2.6 .0 * 12.4 18.1 69 Owl Creek 8975 -M .0 * -M 10.4 * South Pass 9040 11.1 1.1 1009* 19.9 23.3 85 St. Lawrence Alt 8620 -M .0 * -M 14.2 * Togwotee Pass 9580 25.1 21.2 118 31.7 30.7 103 Townsend Creek 8700 8.5 .0 * 20.8 17.9 116 ----- ----- Basin Index (%) 226* 99 BIGHORN BASIN Bald Mtn. 9380 21.9 15.8 139 21.2 23.1 92 Bear Trap Meadow 8200 .5 .0 * 13.1 13.6 96 Bone Springs Div 9350 16.2 11.4 142 18.9 21.9 86 Grave Springs 8550 4.2 .0 * -M 15.9 * Kirwin 9550 -M 4.3 * 18.2 16.6 110 Marquette 8760 -M -M * 21.2 -M * Middle Powder 7760 2.5 .0 * 17.4 17.1 102 Owl Creek 8975 -M .0 * -M 10.4 * Powder River Pass 9480 3.7 .0 * 14.7 18.3 80 Shell Creek 9580 16.5 11.9 139 17.4 19.6 89 Timber Creek 7950 3.8 .0 * 16.8 13.1 128 ----- ----- Basin Index (%) 177* 96 SHOSHONE RIVER Blackwater 9780 29.7 22.3 133 34.2 27.0 127 Evening Star 9200 28.0 20.4 137 38.7 34.5 112 Marquette 8760 -M -M * 21.2 -M * Sylvan Lake 8420 13.8 10.6 130 34.0 28.8 118 Sylvan Road 7120 .1 .0 * 19.9 21.1 94 Younts Peak 8350 -M 7.4 * -M 20.3 * ----- ----- Basin Index (%) 134 114 POWDER RIVER Bear Trap Meadow 8200 .5 .0 * 13.1 13.6 96 Cloud Peak Reservoir 9860 15.6 9.4 166 20.4 20.8 98 Grave Springs 8550 4.2 .0 * -M 15.9 * Hansen Sawmill 8360 2.5 .0 * -M 13.8 * Middle Powder 7760 2.5 .0 * 17.4 17.1 102 Powder River Pass 9480 3.7 .0 * 14.7 18.3 80 Soldier Park 8720 2.4 -M * 14.3 -M * ----- ----- Basin Index (%) 309* 94 TONGUE RIVER Big Goose 7990 8.3 .0 * 20.2 18.0 112 Bone Springs Div 9350 16.2 11.4 142 18.9 21.9 86 Burgess Junction 7880 6.5 2.2 295 15.5 17.8 87 Dome Lake 8880 9.5 .0 * 18.9 20.0 94 Little Goose 8870 11.2 -M * 14.8 -M * Sucker Creek 8880 11.7 3.2 366 20.0 21.1 95 Tie Creek 6870 1.1 .0 * 21.7 18.3 119 ----- ----- Basin Index (%) 317* 98 BELLE FOURCHE Blind Park 6890 .0 .0 * 11.4 17.9 64 Cole Canyon 5910 .0 .0 * 21.2 16.0 132 ----- ----- Basin Index (%) * 96 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 11.4 17.9 64 North Rapid Creek 6130 -M .0 * -M 15.5 * ----- ----- Basin Index (%) * 64 UPPER N. PLATTE Arapaho Ridge 10960 24.9 11.1 224 33.7 29.0 116 Blackhall Mtn 9820 28.4 -M * 41.0 -M * Columbine 9160 5.6 .0 * 35.3 31.2 113 Divide Peak 8880 4.5 .0 * 29.7 27.1 110 Joe Wright 10120 21.9 16.4 134 37.6 33.9 111 Laprele Creek 8375 .1 .0 * 19.4 17.6 110 Med Bow 10500 41.7 -M * 44.3 -M * Never Summer 10280 24.2 17.0 142 25.2 -M * North French Creek 10130 30.0 24.0 125 38.0 34.7 110 Old Battle 10000 40.5 27.3 148 45.9 43.2 106 Rawah 9020 .2 .0 * 22.0 19.3 114 Sage Creek Basin 7850 -M .0 * 20.5 17.7 116 Sand Lake 10050 31.5 22.8 138 31.7 32.7 97 South Brush Creek 8440 .0 .0 * 16.8 20.8 81 Tower 10500 56.9 41.4 137 56.8 48.8 116 Webber Springs 9250 17.2 2.7 637 39.0 32.7 119 Whiskey Park 8950 20.6 11.7 176 40.0 34.5 116 Willow Creek Pass 9540 11.6 3.0 387 22.1 18.1 122 Zirkel 9340 15.2 .0 * 45.4 33.8 134 ----- ----- Basin Index (%) 172 112 SWEETWATER Deer Park 9700 14.4 6.3 229 26.0 26.8 97 Larsen Creek 9000 .1 1.2 8* 18.1 -M * South Pass 9040 11.1 1.1 1009* 19.9 23.3 85 ----- ----- Basin Index (%) 298* 92 LOWER N. PLATTE Casper Mtn. 7900 6.9 .1 6900* 21.2 21.4 99 Laprele Creek 8375 .1 .0 * 19.4 17.6 110 Reno Hill 8400 10.1 .0 * 25.7 22.3 115 Windy Peak 7900 .2 .0 * 15.0 15.8 95 ----- ----- Basin Index (%) 17300* 105 LARAMIE RIVER Brooklyn Lake 10240 18.3 9.0 203 33.2 28.0 119 Cinnabar Park 9574 14.0 4.6 304 30.2 30.0 101 Crow Creek 8330 .0 .0 * 15.0 15.9 94 Deadman Hill 10220 16.2 11.0 147 25.2 23.7 106 Rawah 9020 .2 .0 * 22.0 19.3 114 Roach 9700 8.6 4.7 183 28.6 25.4 113 Windy Peak 7900 .2 .0 * 15.0 15.8 95 ----- ----- Basin Index (%) 196 107 S. PLATTE Black Mountain 8920 .2 -M * 18.9 -M * Crow Creek 8330 .0 .0 * 15.0 15.9 94 Deadman Hill 10220 16.2 11.0 147 25.2 23.7 106 ----- ----- Basin Index (%) 147* 102 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 22.1 19.0 116 Divide Peak 8880 4.5 .0 * 29.7 27.1 110 Elk River 8700 .0 .0 * 25.1 25.2 100 Little Snake River 8915 16.9 5.0 338 45.8 35.8 128 Old Battle 10000 40.5 27.3 148 45.9 43.2 106 Sage Creek Basin 7850 -M .0 * 20.5 17.7 116 Sandstone RS 8150 .0 .0 * 23.0 23.0 100 Whiskey Park 8950 20.6 11.7 176 40.0 34.5 116 ----- ----- Basin Index (%) 188* 112 UPPER GREEN RIVER Big Sandy Opening 9080 6.6 .0 * 19.5 17.6 111 Blind Bull Sum 8650 23.0 15.0 153 24.9 24.0 104 East Rim Divide 7930 .0 .0 * 17.1 14.8 116 Elkhart Park G.S. 9400 10.6 1.5 707 19.7 17.5 113 Gros Ventre Summit 8750 .0 .4 0* 16.5 16.7 99 Gunsight Pass 9820 13.0 5.2 250 20.6 18.3 113 Indian Creek 9425 20.8 13.0 160 26.2 27.7 95 Kendall R.S. 7740 .1 .0 * 16.5 17.4 95 Loomis Park 8240 3.8 .0 * 23.0 21.2 108 New Fork Lake 8340 .0 .0 * 15.4 14.2 108 Pocket Creek 9360 10.3 -M * 19.1 -M * Snider Basin 8060 .0 .0 * 18.1 17.3 105 Spring Creek Divide 9000 21.5 14.3 150 30.0 28.8 104 Triple Peak 8500 -M .7 * -M 31.1 * ----- ----- Basin Index (%) 201* 105 LOWER GREEN RIVER Blacks Fork Jct 8869 .5 -M * 17.9 -M * Buck Pasture 9632 8.7 -M * 27.3 -M * EF Blacks Fork GS 9360 .2 -M * 18.0 -M * Hams Fork 7840 .0 .0 * 18.8 15.0 125 Hewinta 9500 .1 .0 * 20.5 18.3 112 Hickerson Park 9122 .0 .0 * 17.4 14.1 123 Hole-in-Rock 9168 .1 .0 * 17.1 13.7 125 Indian Creek 9425 20.8 13.0 160 26.2 27.7 95 Kelley R.S. 8180 4.6 .0 * 23.4 22.5 104 Spirit Lk 10235 13.5 -M * 24.4 -M * Steel Creek Park 10158 16.3 10.9 150 26.1 21.7 120 ----- ----- Basin Index (%) 175* 112 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 20.4 -M * Bug Lake 7987 9.6 .0 * 31.6 24.2 131 Burts Miller Ranch 8000 .0 -M * 11.3 -M * Chalk Creek #1 9171 19.2 8.8 218 37.6 31.7 119 Hayden Fork 9130 .0 .0 * 30.5 26.5 115 Kelley R.S. 8180 4.6 .0 * 23.4 22.5 104 Lily Lake 9133 .0 .0 * 22.2 22.1 100 Monte Cristo 8932 28.7 7.1 404 41.4 32.4 128 Salt River Summit 7640 .0 .0 * 22.4 20.5 109 Spring Creek Divide 9000 21.5 14.3 150 30.0 28.8 104 ----- ----- Basin Index (%) 277* 115 ----------------------------------------------------------------------------- -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.