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: MAY 22 , 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 24.7 103 Black Bear 8170 39.0 32.7 119 51.6 44.9 115 Blind Bull Sum 8650 23.5 18.8 125 23.6 23.4 101 Cottonwood Creek 7670 9.8 4.4 223 32.9 30.3 109 East Rim Divide 7930 .0 .0 * 16.0 14.3 112 Grand Targhee 9260 43.8 41.6 105 39.9 37.1 108 Granite Creek 6770 .5 .0 * 25.4 23.1 110 Grassy Lake 7265 -M 15.4 * -M 42.1 * Gros Ventre Summit 8750 .6 4.2 14 16.1 16.3 99 Gunsight Pass 9820 12.7 9.3 137 20.2 17.8 113 Lewis Lake Divide 7850 22.2 21.0 106 44.6 41.2 108 Phillips Bench 8200 19.9 17.6 113 38.0 33.1 115 Salt River Summit 7640 .3 .0 * 21.5 20.1 107 Snake River Station 6920 .0 .0 * 29.5 26.7 110 Spring Creek Divide 9000 21.3 19.0 112 29.2 28.3 103 Thumb Divide 7980 4.6 .3 1533* 23.4 22.9 102 Togwotee Pass 9580 23.9 22.8 105 30.5 29.9 102 Two Ocean Plateau 9240 28.4 28.0 101 30.9 33.1 93 Willow Creek 8080 19.1 14.7 130 43.6 41.2 106 Younts Peak 8350 -M 11.1 * -M 19.8 * ----- ----- Basin Index (%) 115 107 MADISON-GALLATIN Black Bear 8170 39.0 32.7 119 51.6 44.9 115 Canyon 7870 3.9 1.1 355* 19.9 20.0 100 Madison Plateau 7750 20.4 13.3 153 34.0 31.8 107 West Yellowstone 6700 .1 .0 * 21.3 17.7 120 Whiskey Creek 6800 8.5 4.3 198 25.8 24.5 105 ----- ----- Basin Index (%) 140 110 YELLOWSTONE Beartooth Lake 9360 24.1 21.1 114 25.5 24.3 105 Burnt Mtn 5880 .6 .0 * 22.9 19.3 119 Canyon 7870 3.9 1.1 355* 19.9 20.0 100 Cole Creek 7850 20.0 15.2 132 -M 19.7 * Evening Star 9200 26.4 23.0 115 36.4 33.6 108 Fisher Creek 9100 34.9 32.2 108 43.1 38.6 112 Northeast Entrance 7350 .1 .0 * 18.4 15.7 117 Parker Peak 9400 24.2 19.4 125 30.0 22.6 133 Sylvan Lake 8420 14.0 14.2 99 32.9 27.9 118 Thumb Divide 7980 4.6 .3 1533* 23.4 22.9 102 Two Ocean Plateau 9240 28.4 28.0 101 30.9 33.1 93 White Mill 8700 24.0 21.6 111 26.0 29.2 89 Wolverine 7650 .0 .0 * 16.9 15.7 108 Younts Peak 8350 -M 11.1 * -M 19.8 * ----- ----- Basin Index (%) 117 108 WIND RIVER Burroughs Creek 8750 2.1 -M * 17.7 -M * Castle Creek 8400 .0 -M * 10.4 -M * Cold Springs 9630 .7 .0 * 12.7 14.5 88 Deer Park 9700 13.4 9.5 141 24.4 26.1 93 Hobbs Park 10100 17.5 12.2 143 19.2 19.5 98 Kirwin 9550 6.3 7.5 84 15.3 16.1 95 Little Warm 9370 2.4 1.5 160 11.3 17.5 65 Owl Creek 8975 1.2 .0 * 11.4 9.8 116 South Pass 9040 9.8 4.9 200 17.8 22.6 79 St. Lawrence Alt 8620 -M .0 * -M 13.6 * Togwotee Pass 9580 23.9 22.8 105 30.5 29.9 102 Townsend Creek 8700 6.8 .0 * 18.1 17.2 105 ----- ----- Basin Index (%) 140 93 BIGHORN BASIN Bald Mtn. 9380 19.0 18.4 103 18.1 22.2 82 Bear Trap Meadow 8200 .4 .0 * 10.3 12.8 80 Bone Springs Div 9350 14.1 13.7 103 16.6 21.1 79 Grave Springs 8550 3.2 .9 356* 12.8 15.1 85 Kirwin 9550 6.3 7.5 84 15.3 16.1 95 Marquette 8760 6.0 -M * 16.4 -M * Middle Powder 7760 .9 3.5 26 14.2 16.4 87 Owl Creek 8975 1.2 .0 * 11.4 9.8 116 Powder River Pass 9480 2.9 4.0 72 -M 17.5 * Shell Creek 9580 14.8 14.6 101 15.0 18.7 80 Timber Creek 7950 1.4 .0 * 12.5 12.4 101 ----- ----- Basin Index (%) 103 87 SHOSHONE RIVER Blackwater 9780 27.7 23.8 116 31.8 26.2 121 Evening Star 9200 26.4 23.0 115 36.4 33.6 108 Marquette 8760 6.0 -M * 16.4 -M * Sylvan Lake 8420 14.0 14.2 99 32.9 27.9 118 Sylvan Road 7120 .0 .0 * 19.2 20.5 94 Younts Peak 8350 -M 11.1 * -M 19.8 * ----- ----- Basin Index (%) 112 111 POWDER RIVER Bear Trap Meadow 8200 .4 .0 * 10.3 12.8 80 Cloud Peak Reservoir 9860 12.3 13.8 89 16.4 19.8 83 Grave Springs 8550 3.2 .9 356* 12.8 15.1 85 Hansen Sawmill 8360 1.1 .0 * 12.9 13.1 98 Middle Powder 7760 .9 3.5 26 14.2 16.4 87 Powder River Pass 9480 2.9 4.0 72 -M 17.5 * Soldier Park 8720 1.0 -M * 11.4 -M * ----- ----- Basin Index (%) 94* 86 TONGUE RIVER Big Goose 7990 6.7 2.9 231 16.7 17.3 97 Bone Springs Div 9350 14.1 13.7 103 16.6 21.1 79 Burgess Junction 7880 5.9 6.9 86 13.0 17.2 76 Dome Lake 8880 6.8 4.7 145 15.4 19.2 80 Little Goose 8870 9.4 -M * 12.6 -M * Sucker Creek 8880 9.6 7.6 126 16.4 20.5 80 Tie Creek 6870 1.2 .0 * 17.7 17.4 102 ----- ----- Basin Index (%) 124 85 BELLE FOURCHE Blind Park 6890 .4 .0 * 10.9 17.0 64 Cole Canyon 5910 1.3 .0 * 19.6 15.0 131 ----- ----- Basin Index (%) * 95 CHEYENNE RIVER BASIN Blind Park 6890 .4 .0 * 10.9 17.0 64 North Rapid Creek 6130 .2 .0 * -M 14.7 * ----- ----- Basin Index (%) * 64 UPPER N. PLATTE Arapaho Ridge 10960 25.1 16.5 152 32.8 28.5 115 Blackhall Mtn 9820 28.9 -M * 39.8 -M * Columbine 9160 9.0 .6 1500* 34.6 30.7 113 Divide Peak 8880 6.0 3.9 154 28.7 26.6 108 Joe Wright 10120 21.9 20.2 108 36.8 33.0 112 Laprele Creek 8375 .5 .0 * 18.4 17.0 108 Med Bow 10500 40.6 -M * 42.8 -M * Never Summer 10280 24.7 19.2 129 24.7 -M * North French Creek 10130 29.2 28.2 104 36.5 33.9 108 Old Battle 10000 39.4 31.8 124 43.8 42.3 104 Rawah 9020 .9 .3 300* 21.4 18.9 113 Sage Creek Basin 7850 -M .0 * 19.8 17.5 113 Sand Lake 10050 30.7 27.0 114 30.6 32.1 95 South Brush Creek 8440 .0 .0 * 15.7 20.3 77 Tower 10500 57.0 46.9 122 55.2 48.1 115 Webber Springs 9250 17.3 9.9 175 37.7 32.2 117 Whiskey Park 8950 24.5 20.0 122 39.0 34.0 115 Willow Creek Pass 9540 14.3 8.2 174 21.9 17.5 125 Zirkel 9340 17.5 6.5 269 44.5 33.4 133 ----- ----- Basin Index (%) 133 111 SWEETWATER Deer Park 9700 13.4 9.5 141 24.4 26.1 93 Larsen Creek 9000 .0 3.0 0 17.4 -M * South Pass 9040 9.8 4.9 200 17.8 22.6 79 ----- ----- Basin Index (%) 133 87 LOWER N. PLATTE Casper Mtn. 7900 6.2 2.9 214 18.2 20.6 88 Laprele Creek 8375 .5 .0 * 18.4 17.0 108 Reno Hill 8400 10.3 1.7 606 23.6 21.6 109 Windy Peak 7900 .6 .0 * 14.2 15.1 94 ----- ----- Basin Index (%) 383 100 LARAMIE RIVER Brooklyn Lake 10240 18.8 14.6 129 32.3 27.4 118 Cinnabar Park 9574 14.3 10.5 136 29.2 29.6 99 Crow Creek 8330 -M .0 * 14.8 15.2 97 Deadman Hill 10220 17.7 15.3 116 24.7 23.2 106 Rawah 9020 .9 .3 300* 21.4 18.9 113 Roach 9700 10.5 10.0 105 27.7 24.8 112 Windy Peak 7900 .6 .0 * 14.2 15.1 94 ----- ----- Basin Index (%) 124 107 S. PLATTE Black Mountain 8920 .7 -M * 18.5 -M * Crow Creek 8330 -M .0 * 14.8 15.2 97 Deadman Hill 10220 17.7 15.3 116 24.7 23.2 106 ----- ----- Basin Index (%) 116* 103 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 21.0 18.7 112 Divide Peak 8880 6.0 3.9 154 28.7 26.6 108 Elk River 8700 1.6 .0 * 24.0 24.7 97 Little Snake River 8915 18.1 11.0 165 44.5 35.2 126 Old Battle 10000 39.4 31.8 124 43.8 42.3 104 Sage Creek Basin 7850 -M .0 * 19.8 17.5 113 Sandstone RS 8150 -M .0 * 22.4 22.6 99 Whiskey Park 8950 24.5 20.0 122 39.0 34.0 115 ----- ----- Basin Index (%) 134 110 UPPER GREEN RIVER Big Sandy Opening 9080 7.7 1.1 700* 19.0 17.0 112 Blind Bull Sum 8650 23.5 18.8 125 23.6 23.4 101 East Rim Divide 7930 .0 .0 * 16.0 14.3 112 Elkhart Park G.S. 9400 10.2 4.7 217 18.6 17.0 109 Gros Ventre Summit 8750 .6 4.2 14 16.1 16.3 99 Gunsight Pass 9820 12.7 9.3 137 20.2 17.8 113 Indian Creek 9425 19.5 17.0 115 24.4 27.2 90 Kendall R.S. 7740 .1 .0 * 15.3 16.9 91 Loomis Park 8240 4.8 1.0 480* 21.6 20.7 104 New Fork Lake 8340 .2 .0 * 14.2 13.7 104 Pocket Creek 9360 10.3 -M * 18.4 -M * Snider Basin 8060 .0 .0 * 17.0 16.9 101 Spring Creek Divide 9000 21.3 19.0 112 29.2 28.3 103 Triple Peak 8500 13.0 6.4 203 31.9 30.4 105 ----- ----- Basin Index (%) 139 103 LOWER GREEN RIVER Blacks Fork Jct 8869 .3 -M * 16.9 -M * Buck Pasture 9632 8.3 -M * 25.8 -M * EF Blacks Fork GS 9360 .5 -M * 16.9 -M * Hams Fork 7840 .3 .0 * 17.0 14.6 116 Hewinta 9500 .0 .0 * 19.5 17.9 109 Hickerson Park 9122 .5 .0 * 16.0 13.6 118 Hole-in-Rock 9168 .9 .0 * 15.8 13.2 120 Indian Creek 9425 19.5 17.0 115 24.4 27.2 90 Kelley R.S. 8180 4.5 1.2 375* 21.8 22.0 99 Spirit Lk 10235 12.6 -M * 22.7 -M * Steel Creek Park 10158 15.6 13.7 114 24.6 21.2 116 ----- ----- Basin Index (%) 129* 107 UPPER BEAR RIVER Bear River RS 8777 .3 -M * 19.4 -M * Bug Lake 7987 9.5 2.5 380 29.6 23.7 125 Burts Miller Ranch 8000 .2 -M * 10.8 -M * Chalk Creek #1 9171 17.9 13.7 131 35.6 31.1 114 Hayden Fork 9130 .1 .0 * 29.0 26.0 112 Kelley R.S. 8180 4.5 1.2 375* 21.8 22.0 99 Lily Lake 9133 .4 .0 * 20.9 21.5 97 Monte Cristo 8932 27.2 12.9 211 39.6 31.8 125 Salt River Summit 7640 .3 .0 * 21.5 20.1 107 Spring Creek Divide 9000 21.3 19.0 112 29.2 28.3 103 ----- ----- Basin Index (%) 165* 111 ----------------------------------------------------------------------------- -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.