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 SUNDAY: APRIL 26 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 15.2 10.6 143 20.6 22.2 93 Black Bear 8170 -M 37.0 * 34.1 40.9 83 Blind Bull Sum 8650 29.5 24.2 122 17.7 20.8 85 Cottonwood Creek 7670 25.3 17.0 149 32.2 26.6 121 East Rim Divide 7930 8.9 8.9 100 11.6 12.5 93 Grand Targhee 9260 46.9 43.3 108 33.6 33.5 100 Granite Creek 6770 17.2 9.3 185 18.7 20.7 90 Grassy Lake 7265 32.3 30.1 107 35.9 38.4 93 Gros Ventre Summit 8750 14.0 12.3 114 14.8 14.1 105 Gunsight Pass 9820 14.9 13.4 111 15.5 15.5 100 Lewis Lake Divide 7850 28.3 30.7 92 33.6 37.7 89 Phillips Bench 8200 -M 25.5 * -M 29.9 * Salt River Summit 7640 13.1 8.4 156 17.5 17.9 98 Snake River Station 6920 15.1 9.8 154 23.2 24.2 96 Spring Creek Divide 9000 28.9 23.9 121 27.0 25.5 106 Thumb Divide 7980 16.3 14.1 116 18.2 20.3 90 Togwotee Pass 9580 29.7 24.5 121 29.5 26.5 111 Two Ocean Plateau 9240 34.8 29.2 119 28.2 29.3 96 Willow Creek 8080 40.2 25.3 159 39.9 36.5 109 Younts Peak 8350 18.3 15.1 121 16.0 17.1 94 ----- ----- Basin Index (%) 123 97 MADISON-GALLATIN Black Bear 8170 -M 37.0 * 34.1 40.9 83 Canyon 7870 14.5 11.6 125 16.2 17.5 93 Madison Plateau 7750 21.4 22.4 96 20.7 28.2 73 West Yellowstone 6700 4.5 4.7 96 9.6 15.5 62 Whiskey Creek 6800 14.8 15.4 96 18.5 21.8 85 ----- ----- Basin Index (%) 102 80 YELLOWSTONE Beartooth Lake 9360 25.1 23.5 107 23.6 21.3 111 Burnt Mtn 5880 6.5 .0 * 16.6 14.9 111 Canyon 7870 14.5 11.6 125 16.2 17.5 93 Cole Creek 7850 20.4 16.3 125 16.0 15.5 103 Evening Star 9200 29.3 24.6 119 32.5 29.6 110 Fisher Creek 9100 35.2 33.2 106 35.8 34.3 104 Northeast Entrance 7350 7.8 4.9 159 13.6 13.4 101 Parker Peak 9400 29.3 21.8 134 25.9 19.4 134 Sylvan Lake 8420 21.6 20.3 106 25.9 24.3 107 Thumb Divide 7980 16.3 14.1 116 18.2 20.3 90 Two Ocean Plateau 9240 34.8 29.2 119 28.2 29.3 96 White Mill 8700 28.3 23.8 119 23.7 25.6 93 Wolverine 7650 10.8 5.2 208 14.4 13.3 108 Younts Peak 8350 18.3 15.1 121 16.0 17.1 94 ----- ----- Basin Index (%) 122 104 WIND RIVER Burroughs Creek 8750 13.1 -M * 15.4 -M * Castle Creek 8400 3.3 -M * 8.3 -M * Cold Springs 9630 6.5 2.7 241 9.2 11.7 79 Deer Park 9700 14.5 16.3 89 16.0 22.8 70 Hobbs Park 10100 15.1 15.7 96 14.5 15.9 91 Kirwin 9550 12.9 10.2 126 12.3 13.1 94 Little Warm 9370 13.0 9.4 138 11.7 14.6 80 Owl Creek 8975 4.2 2.3 183 8.6 7.4 116 South Pass 9040 12.4 15.2 82 13.5 19.6 69 St. Lawrence Alt 8620 3.8 4.6 83 9.2 10.9 84 Togwotee Pass 9580 29.7 24.5 121 29.5 26.5 111 Townsend Creek 8700 10.9 8.7 125 12.5 14.3 87 ----- ----- Basin Index (%) 112 87 BIGHORN BASIN Bald Mtn. 9380 23.0 20.5 112 18.3 18.9 97 Bear Trap Meadow 8200 6.4 1.7 376 10.6 10.0 106 Bone Springs Div 9350 19.0 16.4 116 16.3 17.4 94 Grave Springs 8550 9.8 9.2 107 11.0 12.3 89 Kirwin 9550 12.9 10.2 126 12.3 13.1 94 Marquette 8760 9.1 -M * 10.8 -M * Middle Powder 7760 12.8 12.2 105 12.8 13.5 95 Owl Creek 8975 4.2 2.3 183 8.6 7.4 116 Powder River Pass 9480 12.2 10.1 121 14.3 14.3 100 Shell Creek 9580 16.5 15.9 104 15.5 15.5 100 Timber Creek 7950 3.7 3.6 103 8.4 9.2 91 ----- ----- Basin Index (%) 118 97 SHOSHONE RIVER Blackwater 9780 25.8 24.6 105 25.9 22.7 114 Evening Star 9200 29.3 24.6 119 32.5 29.6 110 Marquette 8760 9.1 -M * 10.8 -M * Sylvan Lake 8420 21.6 20.3 106 25.9 24.3 107 Sylvan Road 7120 6.0 7.9 76 18.0 18.0 100 Younts Peak 8350 18.3 15.1 121 16.0 17.1 94 ----- ----- Basin Index (%) 109 106 POWDER RIVER Bear Trap Meadow 8200 6.4 1.7 376 10.6 10.0 106 Cloud Peak Reservoir 9860 15.4 16.4 94 15.4 15.8 97 Grave Springs 8550 9.8 9.2 107 11.0 12.3 89 Hansen Sawmill 8360 6.7 4.1 163 10.2 10.3 99 Middle Powder 7760 12.8 12.2 105 12.8 13.5 95 Powder River Pass 9480 12.2 10.1 121 14.3 14.3 100 Soldier Park 8720 6.5 -M * 10.3 -M * ----- ----- Basin Index (%) 118 98 TONGUE RIVER Big Goose 7990 9.7 9.1 107 11.2 13.5 83 Bone Springs Div 9350 19.0 16.4 116 16.3 17.4 94 Burgess Junction 7880 12.5 12.4 101 13.7 14.1 97 Dome Lake 8880 13.8 11.8 117 11.5 15.6 74 Little Goose 8870 12.0 -M * -M -M * Sucker Creek 8880 14.3 12.6 113 15.1 16.6 91 Tie Creek 6870 6.8 3.2 212 14.2 13.6 104 ----- ----- Basin Index (%) 116 90 BELLE FOURCHE Blind Park 6890 2.1 3.2 66 9.3 13.7 68 Cole Canyon 5910 -M .6 * -M 11.0 * ----- ----- Basin Index (%) 66 68 CHEYENNE RIVER BASIN Blind Park 6890 2.1 3.2 66 9.3 13.7 68 North Rapid Creek 6130 3.9 3.1 126 9.3 11.7 79 ----- ----- Basin Index (%) 95 73 UPPER N. PLATTE Arapaho Ridge 10960 24.8 21.9 113 25.0 25.6 98 Blackhall Mtn 9820 33.5 -M * 32.6 -M * Columbine 9160 28.3 20.3 139 32.2 27.8 116 Divide Peak 8880 21.1 18.0 117 24.1 23.7 102 Joe Wright 10120 25.2 23.4 108 30.7 29.0 106 Laprele Creek 8375 10.4 7.2 144 14.3 14.5 99 Med Bow 10500 46.7 -M * 39.0 -M * Never Summer 10280 23.1 21.3 108 18.1 -M * North French Creek 10130 36.6 32.8 112 35.8 29.8 120 Old Battle 10000 35.1 34.3 102 33.1 38.2 87 Rawah 9020 11.0 8.0 138 16.7 16.7 100 Sage Creek Basin 7850 9.7 2.2 441 13.5 15.7 86 Sand Lake 10050 33.8 31.1 109 30.6 28.1 109 South Brush Creek 8440 10.2 10.0 102 14.5 17.2 84 Tower 10500 43.7 49.5 88 46.9 43.6 108 Webber Springs 9250 22.9 21.9 105 28.2 29.2 97 Whiskey Park 8950 33.9 25.6 132 34.4 30.7 112 Willow Creek Pass 9540 16.2 13.8 117 15.5 15.2 102 Zirkel 9340 -M 22.1 * -M 30.4 * ----- ----- Basin Index (%) 113 103 SWEETWATER Deer Park 9700 14.5 16.3 89 16.0 22.8 70 Larsen Creek 9000 3.4 9.7 35 10.7 -M * South Pass 9040 12.4 15.2 82 13.5 19.6 69 ----- ----- Basin Index (%) 74 70 LOWER N. PLATTE Casper Mtn. 7900 16.0 14.2 113 13.4 17.3 77 Laprele Creek 8375 10.4 7.2 144 14.3 14.5 99 Reno Hill 8400 18.3 13.7 134 19.7 18.1 109 Windy Peak 7900 8.5 5.8 147 10.3 12.5 82 ----- ----- Basin Index (%) 130 92 LARAMIE RIVER Brooklyn Lake 10240 30.6 22.9 134 30.4 23.9 127 Cinnabar Park 9574 24.6 20.0 123 29.0 26.3 110 Crow Creek 8330 6.2 .0 * 13.3 12.9 103 Deadman Hill 10220 22.0 18.3 120 19.7 20.0 98 Rawah 9020 11.0 8.0 138 16.7 16.7 100 Roach 9700 16.5 16.9 98 18.7 21.6 87 Windy Peak 7900 8.5 5.8 147 10.3 12.5 82 ----- ----- Basin Index (%) 130 103 S. PLATTE Black Mountain 8920 11.0 -M * 16.3 -M * Crow Creek 8330 6.2 .0 * 13.3 12.9 103 Deadman Hill 10220 22.0 18.3 120 19.7 20.0 98 ----- ----- Basin Index (%) 154* 100 LITTLE SNAKE RIVER Battle Mountain 7440 5.9 1.6 369 15.5 16.7 93 Divide Peak 8880 21.1 18.0 117 24.1 23.7 102 Elk River 8700 17.6 14.4 122 19.8 22.1 90 Little Snake River 8915 27.9 23.2 120 35.6 31.8 112 Old Battle 10000 35.1 34.3 102 33.1 38.2 87 Sage Creek Basin 7850 9.7 2.2 441 13.5 15.7 86 Sandstone RS 8150 12.2 8.2 149 17.5 20.2 87 Whiskey Park 8950 33.9 25.6 132 34.4 30.7 112 ----- ----- Basin Index (%) 128 97 UPPER GREEN RIVER Big Sandy Opening 9080 10.4 12.0 87 10.2 14.7 69 Blind Bull Sum 8650 29.5 24.2 122 17.7 20.8 85 East Rim Divide 7930 8.9 8.9 100 11.6 12.5 93 Elkhart Park G.S. 9400 10.9 11.8 92 11.6 14.5 80 Gros Ventre Summit 8750 14.0 12.3 114 14.8 14.1 105 Gunsight Pass 9820 14.9 13.4 111 15.5 15.5 100 Indian Creek 9425 24.0 23.8 101 18.1 24.3 74 Kendall R.S. 7740 9.2 6.3 146 13.4 15.0 89 Loomis Park 8240 14.8 11.6 128 20.8 18.4 113 New Fork Lake 8340 8.8 7.2 122 10.5 11.6 91 Pocket Creek 9360 -M -M * 9.6 -M * Snider Basin 8060 8.9 10.0 89 15.1 15.2 99 Spring Creek Divide 9000 28.9 23.9 121 27.0 25.5 106 Triple Peak 8500 28.8 18.9 152 29.6 27.1 109 ----- ----- Basin Index (%) 115 94 LOWER GREEN RIVER Blacks Fork Jct 8869 6.5 -M * 13.4 -M * Buck Pasture 9632 17.3 -M * 19.3 -M * EF Blacks Fork GS 9360 12.9 -M * 13.5 -M * Hams Fork 7840 6.8 4.6 148 12.6 12.6 100 Hewinta 9500 9.9 6.5 152 16.3 15.6 104 Hickerson Park 9122 7.9 5.1 155 12.4 11.6 107 Hole-in-Rock 9168 8.1 4.6 176 12.6 11.1 114 Indian Creek 9425 24.0 23.8 101 18.1 24.3 74 Kelley R.S. 8180 13.7 11.8 116 17.6 19.6 90 Spirit Lk 10235 17.2 -M * 19.4 -M * Steel Creek Park 10158 18.7 16.6 113 20.0 18.5 108 ----- ----- Basin Index (%) 122 97 UPPER BEAR RIVER Bear River RS 8777 4.7 -M * 12.7 -M * Bug Lake 7987 17.4 16.2 107 19.8 21.1 94 Burts Miller Ranch 8000 .0 -M * 7.8 -M * Chalk Creek #1 9171 20.5 24.7 83 21.1 27.7 76 Hayden Fork 9130 13.0 10.4 125 22.4 23.1 97 Kelley R.S. 8180 13.7 11.8 116 17.6 19.6 90 Lily Lake 9133 11.3 9.8 115 14.1 19.0 74 Monte Cristo 8932 28.7 27.3 105 28.0 28.4 99 Salt River Summit 7640 13.1 8.4 156 17.5 17.9 98 Spring Creek Divide 9000 28.9 23.9 121 27.0 25.5 106 ----- ----- Basin Index (%) 111 92 ----------------------------------------------------------------------------- -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.