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: APRIL 15 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 16.7 13.2 127 19.5 21.3 92 Black Bear 8170 33.2 36.6 91 33.7 39.0 86 Blind Bull Sum 8650 27.3 23.8 115 16.5 19.8 83 Cottonwood Creek 7670 25.5 19.8 129 30.1 25.2 119 East Rim Divide 7930 11.2 10.0 112 10.5 11.9 88 Grand Targhee 9260 45.1 41.0 110 29.5 32.0 92 Granite Creek 6770 18.0 12.3 146 18.7 19.9 94 Grassy Lake 7265 34.0 31.5 108 35.2 36.6 96 Gros Ventre Summit 8750 13.1 13.0 101 13.3 13.3 100 Gunsight Pass 9820 14.0 13.4 104 14.1 14.3 99 Lewis Lake Divide 7850 28.9 30.2 96 32.7 36.1 91 Phillips Bench 8200 -M 26.0 * -M 28.6 * Salt River Summit 7640 15.3 11.2 137 16.4 17.0 96 Snake River Station 6920 17.3 12.8 135 22.6 22.9 99 Spring Creek Divide 9000 27.3 23.2 118 25.6 24.3 105 Thumb Divide 7980 17.9 14.4 124 17.7 19.0 93 Togwotee Pass 9580 28.8 23.0 125 28.2 24.9 113 Two Ocean Plateau 9240 33.5 27.2 123 27.4 27.9 98 Willow Creek 8080 38.8 26.7 145 37.2 34.4 108 Younts Peak 8350 18.5 14.7 126 15.4 16.2 95 ----- ----- Basin Index (%) 117 97 MADISON-GALLATIN Black Bear 8170 33.2 36.6 91 33.7 39.0 86 Canyon 7870 15.6 12.4 126 16.1 16.6 97 Madison Plateau 7750 23.1 22.5 103 20.6 26.8 77 West Yellowstone 6700 -M 8.2 * -M 14.4 * Whiskey Creek 6800 16.0 14.8 108 18.4 20.6 89 ----- ----- Basin Index (%) 102 86 YELLOWSTONE Beartooth Lake 9360 24.9 22.4 111 23.0 20.3 113 Burnt Mtn 5880 8.9 .2 4450* 15.8 13.5 117 Canyon 7870 15.6 12.4 126 16.1 16.6 97 Cole Creek 7850 19.0 15.6 122 14.6 14.0 104 Evening Star 9200 29.5 24.7 119 31.6 28.1 112 Fisher Creek 9100 34.4 31.9 108 35.1 32.6 108 Northeast Entrance 7350 10.1 8.0 126 13.4 12.6 106 Parker Peak 9400 -M 20.5 * -M 18.2 * Sylvan Lake 8420 23.2 20.0 116 25.4 22.9 111 Thumb Divide 7980 17.9 14.4 124 17.7 19.0 93 Two Ocean Plateau 9240 33.5 27.2 123 27.4 27.9 98 White Mill 8700 28.1 23.5 120 23.2 24.4 95 Wolverine 7650 12.7 8.6 148 14.0 12.6 111 Younts Peak 8350 18.5 14.7 126 15.4 16.2 95 ----- ----- Basin Index (%) 124 105 WIND RIVER Burroughs Creek 8750 14.1 -M * 14.9 -M * Castle Creek 8400 5.9 -M * 7.8 -M * Cold Springs 9630 7.5 5.8 129 8.0 10.4 77 Deer Park 9700 15.0 16.0 94 14.5 20.7 70 Hobbs Park 10100 14.6 14.9 98 13.0 14.2 92 Kirwin 9550 12.1 9.9 122 11.7 12.0 98 Little Warm 9370 13.0 10.2 127 10.4 13.4 78 Owl Creek 8975 6.8 5.1 133 8.0 6.4 125 South Pass 9040 12.6 15.8 80 12.1 18.0 67 St. Lawrence Alt 8620 4.8 6.4 75 8.0 9.4 85 Togwotee Pass 9580 28.8 23.0 125 28.2 24.9 113 Townsend Creek 8700 9.9 10.0 99 10.7 12.8 84 ----- ----- Basin Index (%) 107 88 BIGHORN BASIN Bald Mtn. 9380 21.4 19.4 110 16.5 17.7 93 Bear Trap Meadow 8200 8.2 4.4 186 9.9 9.1 109 Bone Springs Div 9350 18.8 16.8 112 15.3 16.2 94 Grave Springs 8550 10.0 9.6 104 10.6 11.2 95 Kirwin 9550 12.1 9.9 122 11.7 12.0 98 Marquette 8760 8.0 -M * 9.6 -M * Middle Powder 7760 13.1 12.4 106 12.4 12.3 101 Owl Creek 8975 6.8 5.1 133 8.0 6.4 125 Powder River Pass 9480 12.7 10.2 125 13.2 13.2 100 Shell Creek 9580 15.9 15.5 103 14.7 14.3 103 Timber Creek 7950 6.1 5.2 117 7.7 7.9 97 ----- ----- Basin Index (%) 115 100 SHOSHONE RIVER Blackwater 9780 24.7 23.7 104 24.6 21.3 115 Evening Star 9200 29.5 24.7 119 31.6 28.1 112 Marquette 8760 8.0 -M * 9.6 -M * Sylvan Lake 8420 23.2 20.0 116 25.4 22.9 111 Sylvan Road 7120 11.4 10.3 111 -M 17.1 * Younts Peak 8350 18.5 14.7 126 15.4 16.2 95 ----- ----- Basin Index (%) 115 110 POWDER RIVER Bear Trap Meadow 8200 8.2 4.4 186 9.9 9.1 109 Cloud Peak Reservoir 9860 15.5 15.4 101 14.5 14.2 102 Grave Springs 8550 10.0 9.6 104 10.6 11.2 95 Hansen Sawmill 8360 7.8 5.9 132 9.6 9.1 105 Middle Powder 7760 13.1 12.4 106 12.4 12.3 101 Powder River Pass 9480 12.7 10.2 125 13.2 13.2 100 Soldier Park 8720 7.6 -M * 9.7 -M * ----- ----- Basin Index (%) 116 102 TONGUE RIVER Big Goose 7990 9.5 9.7 98 10.9 12.1 90 Bone Springs Div 9350 18.8 16.8 112 15.3 16.2 94 Burgess Junction 7880 11.7 12.1 97 13.0 13.0 100 Dome Lake 8880 14.5 12.0 121 10.8 14.3 76 Little Goose 8870 11.9 -M * 9.1 -M * Sucker Creek 8880 14.0 12.6 111 13.9 15.1 92 Tie Creek 6870 8.0 4.8 167 13.6 12.3 111 ----- ----- Basin Index (%) 112 93 BELLE FOURCHE Blind Park 6890 3.7 5.1 73 8.7 12.4 70 Cole Canyon 5910 -M 3.2 * -M 10.0 * ----- ----- Basin Index (%) 73 70 CHEYENNE RIVER BASIN Blind Park 6890 3.7 5.1 73 8.7 12.4 70 North Rapid Creek 6130 6.0 5.5 109 9.0 10.4 87 ----- ----- Basin Index (%) 92 78 UPPER N. PLATTE Arapaho Ridge 10960 23.0 21.6 106 22.8 23.7 96 Blackhall Mtn 9820 31.2 -M * 30.1 -M * Columbine 9160 27.5 21.8 126 29.4 26.4 111 Divide Peak 8880 20.5 20.0 102 21.8 22.2 98 Joe Wright 10120 21.7 22.1 98 27.8 26.9 103 Laprele Creek 8375 11.8 9.0 131 13.3 13.2 101 Med Bow 10500 43.2 -M * 36.1 -M * Never Summer 10280 20.9 20.5 102 15.9 -M * North French Creek 10130 33.4 31.8 105 32.4 27.8 117 Old Battle 10000 32.6 32.2 101 30.3 36.1 84 Rawah 9020 10.0 9.6 104 14.8 15.0 99 Sage Creek Basin 7850 11.7 8.8 133 12.5 15.0 83 Sand Lake 10050 30.5 30.4 100 27.8 25.9 107 South Brush Creek 8440 10.2 10.9 94 13.3 15.9 84 Tower 10500 47.5 47.4 100 43.4 41.1 106 Webber Springs 9250 21.9 23.3 94 25.7 27.7 93 Whiskey Park 8950 32.3 27.0 120 31.8 28.8 110 Willow Creek Pass 9540 14.4 12.7 113 13.5 14.0 96 Zirkel 9340 -M 23.9 * -M 29.2 * ----- ----- Basin Index (%) 106 100 SWEETWATER Deer Park 9700 15.0 16.0 94 14.5 20.7 70 Larsen Creek 9000 6.8 10.8 63 9.9 -M * South Pass 9040 12.6 15.8 80 12.1 18.0 67 ----- ----- Basin Index (%) 81 69 LOWER N. PLATTE Casper Mtn. 7900 16.3 14.4 113 12.1 16.0 76 Laprele Creek 8375 11.8 9.0 131 13.3 13.2 101 Reno Hill 8400 17.5 14.1 124 17.6 16.5 107 Windy Peak 7900 9.3 7.4 126 9.2 11.2 82 ----- ----- Basin Index (%) 122 92 LARAMIE RIVER Brooklyn Lake 10240 27.9 22.2 126 27.1 22.1 123 Cinnabar Park 9574 23.0 21.0 110 25.7 24.9 103 Crow Creek 8330 6.5 4.1 159 11.3 11.5 98 Deadman Hill 10220 19.7 16.5 119 17.7 18.2 97 Rawah 9020 10.0 9.6 104 14.8 15.0 99 Roach 9700 14.9 16.5 90 16.2 20.0 81 Windy Peak 7900 9.3 7.4 126 9.2 11.2 82 ----- ----- Basin Index (%) 114 99 S. PLATTE Black Mountain 8920 10.4 -M * 13.8 -M * Crow Creek 8330 6.5 4.1 159 11.3 11.5 98 Deadman Hill 10220 19.7 16.5 119 17.7 18.2 97 ----- ----- Basin Index (%) 127 98 LITTLE SNAKE RIVER Battle Mountain 7440 8.3 6.7 124 14.5 15.6 93 Divide Peak 8880 20.5 20.0 102 21.8 22.2 98 Elk River 8700 18.6 17.2 108 18.4 20.7 89 Little Snake River 8915 26.8 25.8 104 33.0 30.7 107 Old Battle 10000 32.6 32.2 101 30.3 36.1 84 Sage Creek Basin 7850 11.7 8.8 133 12.5 15.0 83 Sandstone RS 8150 14.0 11.8 119 16.1 19.0 85 Whiskey Park 8950 32.3 27.0 120 31.8 28.8 110 ----- ----- Basin Index (%) 110 95 UPPER GREEN RIVER Big Sandy Opening 9080 10.6 12.9 82 9.6 13.7 70 Blind Bull Sum 8650 27.3 23.8 115 16.5 19.8 83 East Rim Divide 7930 11.2 10.0 112 10.5 11.9 88 Elkhart Park G.S. 9400 10.7 12.0 89 10.7 13.7 78 Gros Ventre Summit 8750 13.1 13.0 101 13.3 13.3 100 Gunsight Pass 9820 14.0 13.4 104 14.1 14.3 99 Indian Creek 9425 24.0 23.9 100 17.0 23.1 74 Kendall R.S. 7740 10.3 9.8 105 11.7 14.4 81 Loomis Park 8240 14.8 13.6 109 19.3 17.6 110 New Fork Lake 8340 10.4 9.6 108 9.6 11.0 87 Pocket Creek 9360 -M -M * 8.8 -M * Snider Basin 8060 11.8 11.6 102 14.3 14.5 99 Spring Creek Divide 9000 27.3 23.2 118 25.6 24.3 105 Triple Peak 8500 28.1 19.7 143 27.2 25.7 106 ----- ----- Basin Index (%) 109 92 LOWER GREEN RIVER Blacks Fork Jct 8869 7.4 -M * 12.3 -M * Buck Pasture 9632 18.4 -M * 18.1 -M * EF Blacks Fork GS 9360 14.2 -M * 12.3 -M * Hams Fork 7840 10.7 8.6 124 12.0 11.7 103 Hewinta 9500 11.2 9.7 115 15.0 14.5 103 Hickerson Park 9122 10.3 6.6 156 12.1 10.7 113 Hole-in-Rock 9168 10.0 6.8 147 11.8 10.2 116 Indian Creek 9425 24.0 23.9 100 17.0 23.1 74 Kelley R.S. 8180 15.3 13.7 112 16.8 18.5 91 Spirit Lk 10235 17.8 -M * 19.0 -M * Steel Creek Park 10158 17.7 16.1 110 18.4 17.2 107 ----- ----- Basin Index (%) 116 97 UPPER BEAR RIVER Bear River RS 8777 8.6 -M * 11.9 -M * Bug Lake 7987 18.7 19.0 98 18.9 19.9 95 Burts Miller Ranch 8000 2.3 -M * 7.3 -M * Chalk Creek #1 9171 -M 24.9 * -M 26.1 * Hayden Fork 9130 15.7 13.9 113 21.1 21.8 97 Kelley R.S. 8180 15.3 13.7 112 16.8 18.5 91 Lily Lake 9133 12.2 12.4 98 13.4 17.8 75 Monte Cristo 8932 28.7 27.8 103 26.9 26.8 100 Salt River Summit 7640 15.3 11.2 137 16.4 17.0 96 Spring Creek Divide 9000 27.3 23.2 118 25.6 24.3 105 ----- ----- Basin Index (%) 110 95 ----------------------------------------------------------------------------- -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.