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 THURSDAY: APRIL 16 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 17.1 12.8 134 20.0 21.4 93 Black Bear 8170 33.4 36.7 91 33.7 39.1 86 Blind Bull Sum 8650 28.1 23.8 118 17.1 19.9 86 Cottonwood Creek 7670 26.3 19.6 134 30.9 25.3 122 East Rim Divide 7930 11.8 9.8 120 11.0 12.0 92 Grand Targhee 9260 45.6 41.2 111 29.4 32.2 91 Granite Creek 6770 18.5 12.0 154 -M 20.0 * Grassy Lake 7265 34.3 31.5 109 35.5 36.8 96 Gros Ventre Summit 8750 13.6 13.0 105 13.8 13.4 103 Gunsight Pass 9820 14.4 13.4 107 14.5 14.5 100 Lewis Lake Divide 7850 29.1 30.2 96 33.1 36.2 91 Phillips Bench 8200 -M 26.0 * -M 28.7 * Salt River Summit 7640 15.5 10.9 142 16.9 17.1 99 Snake River Station 6920 17.4 12.4 140 23.0 23.1 100 Spring Creek Divide 9000 28.1 23.4 120 26.2 24.4 107 Thumb Divide 7980 18.1 14.4 126 18.0 19.2 94 Togwotee Pass 9580 29.3 23.2 126 28.5 25.1 114 Two Ocean Plateau 9240 33.9 27.4 124 27.7 28.0 99 Willow Creek 8080 39.8 26.7 149 37.5 34.6 108 Younts Peak 8350 18.7 14.8 126 15.4 16.3 94 ----- ----- Basin Index (%) 119 99 MADISON-GALLATIN Black Bear 8170 33.4 36.7 91 33.7 39.1 86 Canyon 7870 15.6 12.4 126 16.0 16.7 96 Madison Plateau 7750 23.1 22.6 102 20.6 27.0 76 West Yellowstone 6700 9.7 8.2 118 9.6 14.6 66 Whiskey Creek 6800 16.1 14.8 109 18.4 20.8 88 ----- ----- Basin Index (%) 103 83 YELLOWSTONE Beartooth Lake 9360 24.9 22.6 110 23.2 20.4 114 Burnt Mtn 5880 9.7 .0 * 16.3 13.6 120 Canyon 7870 15.6 12.4 126 16.0 16.7 96 Cole Creek 7850 20.3 15.7 129 15.5 14.1 110 Evening Star 9200 29.6 24.9 119 32.0 28.2 113 Fisher Creek 9100 34.5 32.0 108 35.1 32.7 107 Northeast Entrance 7350 10.2 7.8 131 13.4 12.7 106 Parker Peak 9400 -M 20.6 * -M 18.3 * Sylvan Lake 8420 23.6 20.1 117 25.7 23.0 112 Thumb Divide 7980 18.1 14.4 126 18.0 19.2 94 Two Ocean Plateau 9240 33.9 27.4 124 27.7 28.0 99 White Mill 8700 28.1 23.6 119 23.3 24.5 95 Wolverine 7650 13.1 8.3 158 14.1 12.6 112 Younts Peak 8350 18.7 14.8 126 15.4 16.3 94 ----- ----- Basin Index (%) 125 105 WIND RIVER Burroughs Creek 8750 14.5 -M * 15.1 -M * Castle Creek 8400 6.0 -M * 8.0 -M * Cold Springs 9630 8.3 5.6 148 8.3 10.5 79 Deer Park 9700 15.8 16.0 99 15.0 20.9 72 Hobbs Park 10100 15.4 14.9 103 13.8 14.3 97 Kirwin 9550 12.4 10.0 124 11.7 12.1 97 Little Warm 9370 13.2 10.2 129 10.7 13.5 79 Owl Creek 8975 7.3 4.9 149 8.4 6.5 129 South Pass 9040 13.4 15.8 85 12.8 18.1 71 St. Lawrence Alt 8620 5.9 6.2 95 8.9 9.5 94 Togwotee Pass 9580 29.3 23.2 126 28.5 25.1 114 Townsend Creek 8700 11.0 9.9 111 11.7 12.8 91 ----- ----- Basin Index (%) 113 91 BIGHORN BASIN Bald Mtn. 9380 21.6 19.5 111 16.4 17.8 92 Bear Trap Meadow 8200 8.3 4.2 198 9.9 9.1 109 Bone Springs Div 9350 19.0 16.6 114 15.4 16.3 94 Grave Springs 8550 10.0 9.6 104 10.8 11.2 96 Kirwin 9550 12.4 10.0 124 11.7 12.1 97 Marquette 8760 9.1 -M * 10.5 -M * Middle Powder 7760 13.2 12.5 106 12.5 12.4 101 Owl Creek 8975 7.3 4.9 149 8.4 6.5 129 Powder River Pass 9480 12.9 10.1 128 13.6 13.3 102 Shell Creek 9580 16.0 15.4 104 14.8 14.5 102 Timber Creek 7950 6.7 5.1 131 8.2 8.0 102 ----- ----- Basin Index (%) 118 100 SHOSHONE RIVER Blackwater 9780 25.1 23.7 106 24.9 21.4 116 Evening Star 9200 29.6 24.9 119 32.0 28.2 113 Marquette 8760 9.1 -M * 10.5 -M * Sylvan Lake 8420 23.6 20.1 117 25.7 23.0 112 Sylvan Road 7120 11.7 10.3 114 -M 17.2 * Younts Peak 8350 18.7 14.8 126 15.4 16.3 94 ----- ----- Basin Index (%) 116 110 POWDER RIVER Bear Trap Meadow 8200 8.3 4.2 198 9.9 9.1 109 Cloud Peak Reservoir 9860 15.6 15.4 101 14.5 14.3 101 Grave Springs 8550 10.0 9.6 104 10.8 11.2 96 Hansen Sawmill 8360 7.9 5.6 141 9.8 9.2 107 Middle Powder 7760 13.2 12.5 106 12.5 12.4 101 Powder River Pass 9480 12.9 10.1 128 13.6 13.3 102 Soldier Park 8720 7.6 -M * 9.7 -M * ----- ----- Basin Index (%) 118 102 TONGUE RIVER Big Goose 7990 9.6 9.6 100 10.8 12.2 89 Bone Springs Div 9350 19.0 16.6 114 15.4 16.3 94 Burgess Junction 7880 12.1 12.2 99 13.2 13.1 101 Dome Lake 8880 14.6 12.0 122 10.9 14.4 76 Little Goose 8870 12.1 -M * 9.2 -M * Sucker Creek 8880 14.2 12.6 113 13.9 15.3 91 Tie Creek 6870 8.2 4.7 174 13.8 12.3 112 ----- ----- Basin Index (%) 115 93 BELLE FOURCHE Blind Park 6890 3.9 4.8 81 8.9 12.5 71 Cole Canyon 5910 -M 2.9 * -M 10.0 * ----- ----- Basin Index (%) 81 71 CHEYENNE RIVER BASIN Blind Park 6890 3.9 4.8 81 8.9 12.5 71 North Rapid Creek 6130 6.2 5.1 122 9.1 10.4 88 ----- ----- Basin Index (%) 102 79 UPPER N. PLATTE Arapaho Ridge 10960 23.3 21.6 108 23.2 23.8 97 Blackhall Mtn 9820 32.4 -M * 31.3 -M * Columbine 9160 28.2 21.5 131 30.1 26.5 114 Divide Peak 8880 21.5 19.8 109 22.7 22.3 102 Joe Wright 10120 22.2 22.1 100 28.2 27.1 104 Laprele Creek 8375 11.8 8.9 133 13.4 13.3 101 Med Bow 10500 45.2 -M * 37.6 -M * Never Summer 10280 21.2 20.6 103 16.2 -M * North French Creek 10130 35.1 31.9 110 34.2 27.9 123 Old Battle 10000 33.8 32.2 105 31.5 36.3 87 Rawah 9020 10.4 9.4 111 15.2 15.2 100 Sage Creek Basin 7850 12.4 8.2 151 13.3 15.0 89 Sand Lake 10050 31.5 30.4 104 28.7 26.1 110 South Brush Creek 8440 11.1 10.6 105 13.9 16.0 87 Tower 10500 48.2 47.5 101 44.0 41.2 107 Webber Springs 9250 22.8 23.1 99 26.9 27.8 97 Whiskey Park 8950 33.5 26.7 125 33.1 29.0 114 Willow Creek Pass 9540 14.8 12.7 117 13.8 14.0 99 Zirkel 9340 -M 23.5 * -M 29.3 * ----- ----- Basin Index (%) 110 103 SWEETWATER Deer Park 9700 15.8 16.0 99 15.0 20.9 72 Larsen Creek 9000 6.8 10.7 64 10.1 -M * South Pass 9040 13.4 15.8 85 12.8 18.1 71 ----- ----- Basin Index (%) 85 71 LOWER N. PLATTE Casper Mtn. 7900 16.6 14.4 115 12.2 16.1 76 Laprele Creek 8375 11.8 8.9 133 13.4 13.3 101 Reno Hill 8400 18.0 14.1 128 17.7 16.6 107 Windy Peak 7900 9.4 7.3 129 9.3 11.2 83 ----- ----- Basin Index (%) 125 92 LARAMIE RIVER Brooklyn Lake 10240 29.4 22.2 132 28.6 22.2 129 Cinnabar Park 9574 24.7 20.9 118 26.8 24.9 108 Crow Creek 8330 7.5 3.2 234 12.1 11.5 105 Deadman Hill 10220 20.5 16.5 124 18.5 18.3 101 Rawah 9020 10.4 9.4 111 15.2 15.2 100 Roach 9700 16.0 16.5 97 17.3 20.1 86 Windy Peak 7900 9.4 7.3 129 9.3 11.2 83 ----- ----- Basin Index (%) 123 104 S. PLATTE Black Mountain 8920 11.9 -M * 14.8 -M * Crow Creek 8330 7.5 3.2 234 12.1 11.5 105 Deadman Hill 10220 20.5 16.5 124 18.5 18.3 101 ----- ----- Basin Index (%) 142 103 LITTLE SNAKE RIVER Battle Mountain 7440 9.1 6.3 144 14.8 15.7 94 Divide Peak 8880 21.5 19.8 109 22.7 22.3 102 Elk River 8700 19.7 16.9 117 18.7 20.8 90 Little Snake River 8915 28.2 25.6 110 33.8 30.8 110 Old Battle 10000 33.8 32.2 105 31.5 36.3 87 Sage Creek Basin 7850 12.4 8.2 151 13.3 15.0 89 Sandstone RS 8150 15.8 11.4 139 16.9 19.1 88 Whiskey Park 8950 33.5 26.7 125 33.1 29.0 114 ----- ----- Basin Index (%) 118 98 UPPER GREEN RIVER Big Sandy Opening 9080 10.9 12.8 85 9.8 13.8 71 Blind Bull Sum 8650 28.1 23.8 118 17.1 19.9 86 East Rim Divide 7930 11.8 9.8 120 11.0 12.0 92 Elkhart Park G.S. 9400 10.7 12.0 89 10.8 13.8 78 Gros Ventre Summit 8750 13.6 13.0 105 13.8 13.4 103 Gunsight Pass 9820 14.4 13.4 107 14.5 14.5 100 Indian Creek 9425 24.6 23.7 104 17.5 23.2 75 Kendall R.S. 7740 11.2 9.6 117 12.7 14.5 88 Loomis Park 8240 15.5 13.5 115 19.7 17.7 111 New Fork Lake 8340 10.7 9.4 114 9.7 11.1 87 Pocket Creek 9360 -M -M * 8.9 -M * Snider Basin 8060 12.4 11.4 109 14.6 14.5 101 Spring Creek Divide 9000 28.1 23.4 120 26.2 24.4 107 Triple Peak 8500 29.2 19.5 150 27.4 25.9 106 ----- ----- Basin Index (%) 113 94 LOWER GREEN RIVER Blacks Fork Jct 8869 8.0 -M * 12.9 -M * Buck Pasture 9632 18.9 -M * 18.7 -M * EF Blacks Fork GS 9360 15.2 -M * 13.0 -M * Hams Fork 7840 10.8 8.2 132 12.1 11.7 103 Hewinta 9500 12.2 9.4 130 15.7 14.6 108 Hickerson Park 9122 10.3 6.3 163 12.2 10.7 114 Hole-in-Rock 9168 10.3 6.6 156 12.1 10.3 117 Indian Creek 9425 24.6 23.7 104 17.5 23.2 75 Kelley R.S. 8180 15.6 13.5 116 17.2 18.6 92 Spirit Lk 10235 17.8 -M * 19.1 -M * Steel Creek Park 10158 18.5 16.1 115 19.4 17.3 112 ----- ----- Basin Index (%) 122 100 UPPER BEAR RIVER Bear River RS 8777 8.7 -M * 12.3 -M * Bug Lake 7987 18.8 18.8 100 19.2 20.0 96 Burts Miller Ranch 8000 2.2 -M * 7.5 -M * Chalk Creek #1 9171 21.4 24.9 86 20.1 26.2 77 Hayden Fork 9130 16.8 13.4 125 21.7 21.9 99 Kelley R.S. 8180 15.6 13.5 116 17.2 18.6 92 Lily Lake 9133 12.5 12.1 103 13.7 17.9 77 Monte Cristo 8932 29.5 27.7 106 26.8 26.8 100 Salt River Summit 7640 15.5 10.9 142 16.9 17.1 99 Spring Creek Divide 9000 28.1 23.4 120 26.2 24.4 107 ----- ----- Basin Index (%) 109 94 ----------------------------------------------------------------------------- -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.