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 SATURDAY: MAY 11 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 8.6 3.9 221 24.6 23.7 104 Black Bear 8170 42.9 36.8 117 49.8 43.2 115 Blind Bull Sum 8650 25.0 22.4 112 21.9 22.3 98 Cottonwood Creek 7670 15.8 12.5 126 30.4 29.0 105 East Rim Divide 7930 .0 5.7 0 14.5 13.6 107 Grand Targhee 9260 49.2 46.3 106 38.5 36.1 107 Granite Creek 6770 8.7 4.7 185 23.7 22.2 107 Grassy Lake 7265 -M 25.3 * -M 40.7 * Gros Ventre Summit 8750 4.8 9.5 51 14.9 15.5 96 Gunsight Pass 9820 15.3 12.2 125 19.2 17.1 112 Lewis Lake Divide 7850 30.7 29.0 106 43.5 39.9 109 Phillips Bench 8200 25.2 23.0 110 36.2 32.0 113 Salt River Summit 7640 5.7 3.9 146 19.3 19.2 101 Snake River Station 6920 5.3 1.8 294 28.6 25.7 111 Spring Creek Divide 9000 24.0 23.5 102 27.5 27.2 101 Thumb Divide 7980 11.5 7.9 146 22.3 21.9 102 Togwotee Pass 9580 26.4 25.4 104 29.2 28.7 102 Two Ocean Plateau 9240 33.4 29.5 113 30.0 31.7 95 Willow Creek 8080 26.0 20.8 125 41.1 39.4 104 Younts Peak 8350 -M 15.3 * -M 18.7 * ----- ----- Basin Index (%) 112 105 MADISON-GALLATIN Black Bear 8170 42.9 36.8 117 49.8 43.2 115 Canyon 7870 10.8 7.1 152 19.0 19.0 100 Madison Plateau 7750 26.0 19.6 133 32.3 30.1 107 West Yellowstone 6700 .1 .0 * 19.9 16.7 119 Whiskey Creek 6800 13.8 10.3 134 24.7 23.2 106 ----- ----- Basin Index (%) 127 110 YELLOWSTONE Beartooth Lake 9360 25.7 23.0 112 24.4 23.2 105 Burnt Mtn 5880 2.0 .0 * 19.7 17.8 111 Canyon 7870 10.8 7.1 152 19.0 19.0 100 Cole Creek 7850 20.8 17.2 121 -M 18.3 * Evening Star 9200 29.2 25.5 115 35.2 32.0 110 Fisher Creek 9100 36.0 34.4 105 41.4 36.8 112 Northeast Entrance 7350 .1 .8 12* 17.2 14.7 117 Parker Peak 9400 28.6 22.1 129 29.0 21.3 136 Sylvan Lake 8420 19.1 18.0 106 31.8 26.5 120 Thumb Divide 7980 11.5 7.9 146 22.3 21.9 102 Two Ocean Plateau 9240 33.4 29.5 113 30.0 31.7 95 White Mill 8700 27.4 24.8 110 24.7 27.7 89 Wolverine 7650 .2 .0 * 16.0 14.7 109 Younts Peak 8350 -M 15.3 * -M 18.7 * ----- ----- Basin Index (%) 116 108 WIND RIVER Burroughs Creek 8750 7.5 -M * 16.7 -M * Castle Creek 8400 .0 -M * 9.0 -M * Cold Springs 9630 4.4 1.2 367 12.1 13.5 90 Deer Park 9700 15.9 14.4 110 23.3 24.9 94 Hobbs Park 10100 19.3 15.8 122 18.1 18.0 101 Kirwin 9550 10.4 10.9 95 14.6 15.0 97 Little Warm 9370 7.8 6.6 118 11.3 16.4 69 Owl Creek 8975 .3 .5 60* 9.9 8.8 112 South Pass 9040 13.4 11.4 118 17.0 21.5 79 St. Lawrence Alt 8620 -M .8 * -M 12.6 * Togwotee Pass 9580 26.4 25.4 104 29.2 28.7 102 Townsend Creek 8700 9.9 3.4 291 16.5 16.0 103 ----- ----- Basin Index (%) 120 93 BIGHORN BASIN Bald Mtn. 9380 20.9 20.7 101 16.8 21.2 79 Bear Trap Meadow 8200 .0 .0 * 8.8 11.8 75 Bone Springs Div 9350 16.9 16.6 102 15.5 19.9 78 Grave Springs 8550 6.5 7.5 87 11.5 14.4 80 Kirwin 9550 10.4 10.9 95 14.6 15.0 97 Marquette 8760 8.4 -M * 13.0 -M * Middle Powder 7760 5.3 10.5 50 11.0 15.5 71 Owl Creek 8975 .3 .5 60* 9.9 8.8 112 Powder River Pass 9480 7.2 9.0 80 -M 16.4 * Shell Creek 9580 16.5 16.8 98 13.6 17.7 77 Timber Creek 7950 1.2 1.3 92 10.3 11.2 92 ----- ----- Basin Index (%) 91 83 SHOSHONE RIVER Blackwater 9780 29.6 24.6 120 30.3 24.7 123 Evening Star 9200 29.2 25.5 115 35.2 32.0 110 Marquette 8760 8.4 -M * 13.0 -M * Sylvan Lake 8420 19.1 18.0 106 31.8 26.5 120 Sylvan Road 7120 .0 1.2 0 19.0 19.4 98 Younts Peak 8350 -M 15.3 * -M 18.7 * ----- ----- Basin Index (%) 112 113 POWDER RIVER Bear Trap Meadow 8200 .0 .0 * 8.8 11.8 75 Cloud Peak Reservoir 9860 14.3 16.8 85 14.6 18.4 79 Grave Springs 8550 6.5 7.5 87 11.5 14.4 80 Hansen Sawmill 8360 2.9 1.0 290 10.6 12.0 88 Middle Powder 7760 5.3 10.5 50 11.0 15.5 71 Powder River Pass 9480 7.2 9.0 80 -M 16.4 * Soldier Park 8720 1.2 -M * 9.7 -M * ----- ----- Basin Index (%) 81 78 TONGUE RIVER Big Goose 7990 9.4 10.3 91 14.8 16.0 92 Bone Springs Div 9350 16.9 16.6 102 15.5 19.9 78 Burgess Junction 7880 9.3 11.4 82 11.9 16.2 73 Dome Lake 8880 9.1 11.1 82 13.3 18.1 73 Little Goose 8870 11.7 -M * 11.2 -M * Sucker Creek 8880 12.4 12.7 98 14.7 19.2 77 Tie Creek 6870 2.4 1.2 200 15.5 16.2 96 ----- ----- Basin Index (%) 94 81 BELLE FOURCHE Blind Park 6890 .1 .0 * 9.8 15.7 62 Cole Canyon 5910 .0 .0 * 15.7 13.8 114 ----- ----- Basin Index (%) * 86 CHEYENNE RIVER BASIN Blind Park 6890 .1 .0 * 9.8 15.7 62 North Rapid Creek 6130 .0 .0 * -M 13.8 * ----- ----- Basin Index (%) * 62 UPPER N. PLATTE Arapaho Ridge 10960 25.7 22.3 115 30.8 27.6 112 Blackhall Mtn 9820 33.4 -M * 39.0 -M * Columbine 9160 14.9 11.9 125 32.8 29.7 110 Divide Peak 8880 13.7 13.7 100 28.1 25.6 110 Joe Wright 10120 22.2 23.2 96 34.9 31.5 111 Laprele Creek 8375 3.7 2.0 185 17.3 16.2 107 Med Bow 10500 41.3 -M * 41.2 -M * Never Summer 10280 25.1 22.2 113 22.9 -M * North French Creek 10130 32.0 32.7 98 35.4 32.5 109 Old Battle 10000 40.7 36.9 110 42.9 40.9 105 Rawah 9020 4.8 2.4 200 20.4 18.3 111 Sage Creek Basin 7850 4.4 .0 * 19.3 16.9 114 Sand Lake 10050 32.5 31.7 103 29.9 30.7 97 South Brush Creek 8440 .0 4.4 0 15.2 19.1 80 Tower 10500 56.2 51.2 110 53.0 46.6 114 Webber Springs 9250 22.0 19.0 116 36.5 31.2 117 Whiskey Park 8950 27.7 26.5 105 38.0 33.0 115 Willow Creek Pass 9540 17.8 13.0 137 21.1 16.5 128 Zirkel 9340 24.5 19.3 127 43.2 32.8 132 ----- ----- Basin Index (%) 111 111 SWEETWATER Deer Park 9700 15.9 14.4 110 23.3 24.9 94 Larsen Creek 9000 .0 6.2 0 16.9 -M * South Pass 9040 13.4 11.4 118 17.0 21.5 79 ----- ----- Basin Index (%) 92 87 LOWER N. PLATTE Casper Mtn. 7900 10.4 11.1 94 16.4 19.6 84 Laprele Creek 8375 3.7 2.0 185 17.3 16.2 107 Reno Hill 8400 13.9 10.0 139 21.6 20.4 106 Windy Peak 7900 2.1 .0 * 13.6 13.9 98 ----- ----- Basin Index (%) 130 98 LARAMIE RIVER Brooklyn Lake 10240 23.4 21.1 111 31.3 26.1 120 Cinnabar Park 9574 18.2 17.0 107 28.3 28.4 100 Crow Creek 8330 .0 .0 * 13.7 14.4 95 Deadman Hill 10220 22.4 18.5 121 24.3 21.8 111 Rawah 9020 4.8 2.4 200 20.4 18.3 111 Roach 9700 15.0 15.5 97 26.6 23.4 114 Windy Peak 7900 2.1 .0 * 13.6 13.9 98 ----- ----- Basin Index (%) 115 108 S. PLATTE Black Mountain 8920 6.8 -M * 17.8 -M * Crow Creek 8330 .0 .0 * 13.7 14.4 95 Deadman Hill 10220 22.4 18.5 121 24.3 21.8 111 ----- ----- Basin Index (%) 121* 105 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 20.3 18.0 113 Divide Peak 8880 13.7 13.7 100 28.1 25.6 110 Elk River 8700 10.2 7.0 146 23.4 23.8 98 Little Snake River 8915 24.0 20.1 119 43.4 34.4 126 Old Battle 10000 40.7 36.9 110 42.9 40.9 105 Sage Creek Basin 7850 4.4 .0 * 19.3 16.9 114 Sandstone RS 8150 3.9 1.3 300* 21.9 21.9 100 Whiskey Park 8950 27.7 26.5 105 38.0 33.0 115 ----- ----- Basin Index (%) 118 111 UPPER GREEN RIVER Big Sandy Opening 9080 12.3 8.6 143 18.1 16.2 112 Blind Bull Sum 8650 25.0 22.4 112 21.9 22.3 98 East Rim Divide 7930 .0 5.7 0 14.5 13.6 107 Elkhart Park G.S. 9400 13.5 9.5 142 17.2 16.0 108 Gros Ventre Summit 8750 4.8 9.5 51 14.9 15.5 96 Gunsight Pass 9820 15.3 12.2 125 19.2 17.1 112 Indian Creek 9425 21.2 21.1 100 22.0 26.2 84 Kendall R.S. 7740 .9 .0 * 14.2 16.2 88 Loomis Park 8240 10.0 7.0 143 20.3 19.9 102 New Fork Lake 8340 4.3 2.4 179 12.8 12.9 99 Pocket Creek 9360 14.1 -M * 17.9 -M * Snider Basin 8060 .0 7.2 0 15.7 16.3 96 Spring Creek Divide 9000 24.0 23.5 102 27.5 27.2 101 Triple Peak 8500 18.1 14.5 125 29.9 29.2 102 ----- ----- Basin Index (%) 104 100 LOWER GREEN RIVER Blacks Fork Jct 8869 .4 -M * 16.2 -M * Buck Pasture 9632 14.1 -M * 24.7 -M * EF Blacks Fork GS 9360 4.9 -M * 15.4 -M * Hams Fork 7840 .0 .2 0* 15.2 13.9 109 Hewinta 9500 4.6 1.5 307 18.5 17.2 108 Hickerson Park 9122 2.1 .0 * 14.9 12.9 116 Hole-in-Rock 9168 .1 .0 * 14.2 12.4 115 Indian Creek 9425 21.2 21.1 100 22.0 26.2 84 Kelley R.S. 8180 8.5 8.1 105 19.2 21.2 91 Spirit Lk 10235 14.3 -M * 20.8 -M * Steel Creek Park 10158 17.7 17.6 101 23.3 20.3 115 ----- ----- Basin Index (%) 112* 103 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 18.6 -M * Bug Lake 7987 16.7 12.0 139 28.1 22.7 124 Burts Miller Ranch 8000 -M -M * 10.7 -M * Chalk Creek #1 9171 21.9 21.2 103 34.3 29.9 115 Hayden Fork 9130 7.7 5.4 143 27.8 25.0 111 Kelley R.S. 8180 8.5 8.1 105 19.2 21.2 91 Lily Lake 9133 7.9 4.5 176 20.1 20.7 97 Monte Cristo 8932 30.8 21.0 147 37.2 30.8 121 Salt River Summit 7640 5.7 3.9 146 19.3 19.2 101 Spring Creek Divide 9000 24.0 23.5 102 27.5 27.2 101 ----- ----- Basin Index (%) 124 109 ----------------------------------------------------------------------------- -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.