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 FRIDAY: APRIL 24 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 15.7 11.0 143 20.5 22.0 93 Black Bear 8170 -M 36.9 * 34.0 40.5 84 Blind Bull Sum 8650 29.5 24.3 121 17.6 20.6 85 Cottonwood Creek 7670 25.7 17.5 147 32.0 26.3 122 East Rim Divide 7930 10.0 9.2 109 11.5 12.4 93 Grand Targhee 9260 46.9 42.9 109 33.6 33.2 101 Granite Creek 6770 18.0 9.8 184 18.6 20.5 91 Grassy Lake 7265 32.7 30.4 108 35.8 38.0 94 Gros Ventre Summit 8750 14.1 12.7 111 14.8 14.0 106 Gunsight Pass 9820 14.9 13.6 110 15.5 15.3 101 Lewis Lake Divide 7850 28.5 30.7 93 33.5 37.4 90 Phillips Bench 8200 -M 25.3 * -M 29.6 * Salt River Summit 7640 13.8 8.7 159 17.4 17.7 98 Snake River Station 6920 15.5 10.5 148 23.2 23.9 97 Spring Creek Divide 9000 28.8 23.6 122 26.9 25.3 106 Thumb Divide 7980 16.7 14.2 118 18.0 20.1 90 Togwotee Pass 9580 29.4 24.4 120 29.3 26.1 112 Two Ocean Plateau 9240 34.4 28.8 119 28.0 29.0 97 Willow Creek 8080 39.6 26.1 152 39.0 36.1 108 Younts Peak 8350 18.4 15.1 122 15.9 16.9 94 ----- ----- Basin Index (%) 122 98 MADISON-GALLATIN Black Bear 8170 -M 36.9 * 34.0 40.5 84 Canyon 7870 15.0 11.8 127 16.2 17.3 94 Madison Plateau 7750 22.2 22.7 98 20.7 27.9 74 West Yellowstone 6700 5.7 5.6 102 9.6 15.4 62 Whiskey Creek 6800 15.3 15.4 99 18.6 21.6 86 ----- ----- Basin Index (%) 105 81 YELLOWSTONE Beartooth Lake 9360 25.1 23.6 106 23.6 21.1 112 Burnt Mtn 5880 7.4 .0 * 16.5 14.8 111 Canyon 7870 15.0 11.8 127 16.2 17.3 94 Cole Creek 7850 20.4 16.3 125 16.0 15.1 106 Evening Star 9200 29.1 24.4 119 32.4 29.3 111 Fisher Creek 9100 35.0 33.1 106 35.7 34.0 105 Northeast Entrance 7350 8.5 5.4 157 13.6 13.2 103 Parker Peak 9400 29.0 21.6 134 25.8 19.2 134 Sylvan Lake 8420 22.2 20.3 109 25.9 24.1 107 Thumb Divide 7980 16.7 14.2 118 18.0 20.1 90 Two Ocean Plateau 9240 34.4 28.8 119 28.0 29.0 97 White Mill 8700 28.1 23.8 118 23.6 25.3 93 Wolverine 7650 11.7 5.8 202 14.4 13.1 110 Younts Peak 8350 18.4 15.1 122 15.9 16.9 94 ----- ----- Basin Index (%) 123 104 WIND RIVER Burroughs Creek 8750 13.8 -M * 15.1 -M * Castle Creek 8400 4.3 -M * 8.1 -M * Cold Springs 9630 7.3 3.4 215 9.1 11.5 79 Deer Park 9700 15.0 16.3 92 16.0 22.4 71 Hobbs Park 10100 15.1 15.5 97 14.5 15.5 94 Kirwin 9550 12.9 10.1 128 12.2 12.9 95 Little Warm 9370 13.1 9.7 135 11.6 14.3 81 Owl Creek 8975 5.3 3.0 177 8.6 7.2 119 South Pass 9040 12.9 15.3 84 13.5 19.2 70 St. Lawrence Alt 8620 4.4 5.1 86 9.2 10.5 88 Togwotee Pass 9580 29.4 24.4 120 29.3 26.1 112 Townsend Creek 8700 11.0 8.9 124 12.5 13.9 90 ----- ----- Basin Index (%) 113 89 BIGHORN BASIN Bald Mtn. 9380 22.6 20.2 112 18.1 18.6 97 Bear Trap Meadow 8200 7.1 2.2 323 10.5 9.8 107 Bone Springs Div 9350 18.7 16.4 114 16.3 17.2 95 Grave Springs 8550 9.9 9.3 106 11.0 12.1 91 Kirwin 9550 12.9 10.1 128 12.2 12.9 95 Marquette 8760 9.2 -M * 10.7 -M * Middle Powder 7760 12.9 12.3 105 12.8 13.2 97 Owl Creek 8975 5.3 3.0 177 8.6 7.2 119 Powder River Pass 9480 12.3 10.3 119 14.2 14.1 101 Shell Creek 9580 16.2 15.8 103 15.5 15.2 102 Timber Creek 7950 4.7 3.9 121 8.4 8.8 95 ----- ----- Basin Index (%) 118 99 SHOSHONE RIVER Blackwater 9780 25.7 24.3 106 25.7 22.3 115 Evening Star 9200 29.1 24.4 119 32.4 29.3 111 Marquette 8760 9.2 -M * 10.7 -M * Sylvan Lake 8420 22.2 20.3 109 25.9 24.1 107 Sylvan Road 7120 7.3 8.6 85 18.0 17.9 101 Younts Peak 8350 18.4 15.1 122 15.9 16.9 94 ----- ----- Basin Index (%) 111 107 POWDER RIVER Bear Trap Meadow 8200 7.1 2.2 323 10.5 9.8 107 Cloud Peak Reservoir 9860 15.3 16.2 94 15.3 15.4 99 Grave Springs 8550 9.9 9.3 106 11.0 12.1 91 Hansen Sawmill 8360 7.2 4.4 164 10.2 10.0 102 Middle Powder 7760 12.9 12.3 105 12.8 13.2 97 Powder River Pass 9480 12.3 10.3 119 14.2 14.1 101 Soldier Park 8720 6.8 -M * 10.2 -M * ----- ----- Basin Index (%) 118 99 TONGUE RIVER Big Goose 7990 9.8 9.1 108 11.1 13.2 84 Bone Springs Div 9350 18.7 16.4 114 16.3 17.2 95 Burgess Junction 7880 12.4 12.5 99 13.7 13.9 99 Dome Lake 8880 13.7 11.8 116 11.4 15.3 75 Little Goose 8870 12.1 -M * -M -M * Sucker Creek 8880 14.4 12.7 113 14.9 16.2 92 Tie Creek 6870 7.1 3.8 187 14.1 13.4 105 ----- ----- Basin Index (%) 115 91 BELLE FOURCHE Blind Park 6890 2.7 3.8 71 9.3 13.5 69 Cole Canyon 5910 -M 1.1 * -M 10.8 * ----- ----- Basin Index (%) 71 69 CHEYENNE RIVER BASIN Blind Park 6890 2.7 3.8 71 9.3 13.5 69 North Rapid Creek 6130 4.5 3.8 118 9.3 11.5 81 ----- ----- Basin Index (%) 95 74 UPPER N. PLATTE Arapaho Ridge 10960 24.6 21.6 114 24.7 25.2 98 Blackhall Mtn 9820 33.1 -M * 32.2 -M * Columbine 9160 27.7 20.7 134 31.8 27.5 116 Divide Peak 8880 21.6 18.2 119 23.6 23.3 101 Joe Wright 10120 24.4 23.0 106 29.9 28.5 105 Laprele Creek 8375 10.5 7.3 144 14.0 14.2 99 Med Bow 10500 46.6 -M * 38.3 -M * Never Summer 10280 22.2 20.9 106 17.4 -M * North French Creek 10130 36.2 32.4 112 35.5 29.3 121 Old Battle 10000 34.5 33.8 102 32.6 37.7 86 Rawah 9020 10.7 8.0 134 16.3 16.4 99 Sage Creek Basin 7850 10.7 3.5 306 13.4 15.5 86 Sand Lake 10050 33.0 30.9 107 30.2 27.6 109 South Brush Creek 8440 10.5 9.9 106 14.4 16.9 85 Tower 10500 44.6 49.1 91 46.4 43.1 108 Webber Springs 9250 23.1 21.9 105 27.9 28.9 97 Whiskey Park 8950 33.7 25.6 132 33.9 30.3 112 Willow Creek Pass 9540 15.8 13.6 116 15.0 14.9 101 Zirkel 9340 -M 22.5 * -M 30.2 * ----- ----- Basin Index (%) 113 103 SWEETWATER Deer Park 9700 15.0 16.3 92 16.0 22.4 71 Larsen Creek 9000 4.6 9.9 46 10.8 -M * South Pass 9040 12.9 15.3 84 13.5 19.2 70 ----- ----- Basin Index (%) 78 71 LOWER N. PLATTE Casper Mtn. 7900 16.1 14.2 113 13.1 17.0 77 Laprele Creek 8375 10.5 7.3 144 14.0 14.2 99 Reno Hill 8400 18.4 13.9 132 19.1 17.8 107 Windy Peak 7900 8.8 6.2 142 10.1 12.2 83 ----- ----- Basin Index (%) 129 92 LARAMIE RIVER Brooklyn Lake 10240 30.4 22.7 134 29.9 23.5 127 Cinnabar Park 9574 24.7 19.9 124 28.9 26.0 111 Crow Creek 8330 6.5 .0 * 13.1 12.6 104 Deadman Hill 10220 21.7 17.9 121 19.5 19.6 99 Rawah 9020 10.7 8.0 134 16.3 16.4 99 Roach 9700 16.8 16.7 101 18.6 21.3 87 Windy Peak 7900 8.8 6.2 142 10.1 12.2 83 ----- ----- Basin Index (%) 131 104 S. PLATTE Black Mountain 8920 11.0 -M * 16.0 -M * Crow Creek 8330 6.5 .0 * 13.1 12.6 104 Deadman Hill 10220 21.7 17.9 121 19.5 19.6 99 ----- ----- Basin Index (%) 158* 101 LITTLE SNAKE RIVER Battle Mountain 7440 7.0 2.4 292 15.4 16.4 94 Divide Peak 8880 21.6 18.2 119 23.6 23.3 101 Elk River 8700 18.4 14.7 125 19.6 21.8 90 Little Snake River 8915 28.1 23.5 120 35.1 31.5 111 Old Battle 10000 34.5 33.8 102 32.6 37.7 86 Sage Creek Basin 7850 10.7 3.5 306 13.4 15.5 86 Sandstone RS 8150 13.1 9.2 142 17.5 20.0 88 Whiskey Park 8950 33.7 25.6 132 33.9 30.3 112 ----- ----- Basin Index (%) 128 97 UPPER GREEN RIVER Big Sandy Opening 9080 10.7 12.2 88 10.2 14.5 70 Blind Bull Sum 8650 29.5 24.3 121 17.6 20.6 85 East Rim Divide 7930 10.0 9.2 109 11.5 12.4 93 Elkhart Park G.S. 9400 10.9 11.8 92 11.5 14.3 80 Gros Ventre Summit 8750 14.1 12.7 111 14.8 14.0 106 Gunsight Pass 9820 14.9 13.6 110 15.5 15.3 101 Indian Creek 9425 24.5 23.6 104 18.1 24.1 75 Kendall R.S. 7740 10.0 7.0 143 13.4 14.9 90 Loomis Park 8240 15.2 12.1 126 20.7 18.2 114 New Fork Lake 8340 9.5 7.7 123 10.4 11.5 90 Pocket Creek 9360 -M -M * 9.6 -M * Snider Basin 8060 10.2 10.2 100 15.1 15.1 100 Spring Creek Divide 9000 28.8 23.6 122 26.9 25.3 106 Triple Peak 8500 29.7 19.1 155 29.4 26.8 110 ----- ----- Basin Index (%) 117 95 LOWER GREEN RIVER Blacks Fork Jct 8869 7.4 -M * 13.5 -M * Buck Pasture 9632 18.0 -M * 19.3 -M * EF Blacks Fork GS 9360 14.0 -M * 13.5 -M * Hams Fork 7840 8.0 5.3 151 12.4 12.4 100 Hewinta 9500 11.7 7.2 162 16.3 15.4 106 Hickerson Park 9122 8.9 5.1 175 12.5 11.5 109 Hole-in-Rock 9168 9.1 5.3 172 12.5 10.9 115 Indian Creek 9425 24.5 23.6 104 18.1 24.1 75 Kelley R.S. 8180 14.6 11.9 123 17.6 19.3 91 Spirit Lk 10235 17.5 -M * 19.4 -M * Steel Creek Park 10158 19.1 16.5 116 20.0 18.2 110 ----- ----- Basin Index (%) 128 98 UPPER BEAR RIVER Bear River RS 8777 6.1 -M * 12.7 -M * Bug Lake 7987 18.2 16.2 112 19.8 20.8 95 Burts Miller Ranch 8000 .0 -M * 7.8 -M * Chalk Creek #1 9171 21.3 24.6 87 21.0 27.3 77 Hayden Fork 9130 14.8 10.9 136 22.4 22.8 98 Kelley R.S. 8180 14.6 11.9 123 17.6 19.3 91 Lily Lake 9133 12.2 10.0 122 14.1 18.7 75 Monte Cristo 8932 29.3 27.3 107 28.0 28.0 100 Salt River Summit 7640 13.8 8.7 159 17.4 17.7 98 Spring Creek Divide 9000 28.8 23.6 122 26.9 25.3 106 ----- ----- Basin Index (%) 115 93 ----------------------------------------------------------------------------- -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.