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 TUESDAY: APRIL 14 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 17.5 13.5 130 19.4 21.2 92 Black Bear 8170 -M 36.5 * 33.6 38.8 87 Blind Bull Sum 8650 27.1 23.8 114 16.5 19.7 84 Cottonwood Creek 7670 25.3 20.1 126 30.0 25.1 120 East Rim Divide 7930 11.0 10.0 110 10.2 11.9 86 Grand Targhee 9260 45.0 40.7 111 29.3 31.7 92 Granite Creek 6770 17.9 12.7 141 17.2 19.8 87 Grassy Lake 7265 34.2 31.4 109 35.1 36.5 96 Gros Ventre Summit 8750 13.1 12.9 102 13.1 13.2 99 Gunsight Pass 9820 13.9 13.5 103 13.9 14.2 98 Lewis Lake Divide 7850 29.0 30.2 96 32.8 35.9 91 Phillips Bench 8200 -M 26.0 * -M 28.5 * Salt River Summit 7640 15.2 11.5 132 16.3 17.0 96 Snake River Station 6920 18.7 13.2 142 22.7 22.8 100 Spring Creek Divide 9000 27.1 23.1 117 25.4 24.2 105 Thumb Divide 7980 17.9 14.5 123 17.8 18.9 94 Togwotee Pass 9580 28.7 22.9 125 28.0 24.8 113 Two Ocean Plateau 9240 33.2 27.0 123 27.2 27.7 98 Willow Creek 8080 38.7 26.9 144 37.1 34.3 108 Younts Peak 8350 18.3 14.7 124 15.0 16.1 93 ----- ----- Basin Index (%) 119 97 MADISON-GALLATIN Black Bear 8170 -M 36.5 * 33.6 38.8 87 Canyon 7870 15.7 12.3 128 15.8 16.5 96 Madison Plateau 7750 23.1 22.4 103 20.5 26.7 77 West Yellowstone 6700 -M 8.4 * -M 14.3 * Whiskey Creek 6800 16.1 14.7 110 18.2 20.6 88 ----- ----- Basin Index (%) 111 86 YELLOWSTONE Beartooth Lake 9360 24.6 22.2 111 22.8 20.2 113 Burnt Mtn 5880 8.9 1.0 890 15.1 13.4 113 Canyon 7870 15.7 12.3 128 15.8 16.5 96 Cole Creek 7850 18.8 15.5 121 14.4 13.8 104 Evening Star 9200 29.0 24.6 118 31.4 27.9 113 Fisher Creek 9100 34.2 31.8 108 34.7 32.4 107 Northeast Entrance 7350 10.5 8.2 128 13.2 12.6 105 Parker Peak 9400 -M 20.4 * -M 18.1 * Sylvan Lake 8420 23.2 19.9 117 25.0 22.8 110 Thumb Divide 7980 17.9 14.5 123 17.8 18.9 94 Two Ocean Plateau 9240 33.2 27.0 123 27.2 27.7 98 White Mill 8700 27.9 23.4 119 23.0 24.2 95 Wolverine 7650 12.6 8.9 142 13.8 12.5 110 Younts Peak 8350 18.3 14.7 124 15.0 16.1 93 ----- ----- Basin Index (%) 123 104 WIND RIVER Burroughs Creek 8750 14.0 -M * 14.4 -M * Castle Creek 8400 5.7 -M * 7.6 -M * Cold Springs 9630 7.2 5.9 122 7.7 10.3 75 Deer Park 9700 15.0 16.1 93 14.2 20.6 69 Hobbs Park 10100 14.5 14.9 97 12.6 14.1 89 Kirwin 9550 11.8 9.9 119 11.4 11.9 96 Little Warm 9370 12.9 10.3 125 10.1 13.3 76 Owl Creek 8975 6.6 5.3 125 7.8 6.3 124 South Pass 9040 12.5 15.8 79 11.8 18.0 66 St. Lawrence Alt 8620 4.6 6.6 70 7.9 9.4 84 Togwotee Pass 9580 28.7 22.9 125 28.0 24.8 113 Townsend Creek 8700 9.7 10.0 97 10.3 12.7 81 ----- ----- Basin Index (%) 105 86 BIGHORN BASIN Bald Mtn. 9380 21.0 19.4 108 15.6 17.6 89 Bear Trap Meadow 8200 8.0 4.5 178 9.6 9.0 107 Bone Springs Div 9350 18.7 16.9 111 15.0 16.1 93 Grave Springs 8550 9.9 9.6 103 10.6 11.1 95 Kirwin 9550 11.8 9.9 119 11.4 11.9 96 Marquette 8760 7.8 -M * 9.4 -M * Middle Powder 7760 13.0 12.4 105 12.3 12.3 100 Owl Creek 8975 6.6 5.3 125 7.8 6.3 124 Powder River Pass 9480 12.6 10.2 124 12.9 13.1 98 Shell Creek 9580 15.6 15.6 100 14.4 14.3 101 Timber Creek 7950 6.1 5.2 117 7.7 7.8 99 ----- ----- Basin Index (%) 113 98 SHOSHONE RIVER Blackwater 9780 24.5 23.6 104 24.4 21.2 115 Evening Star 9200 29.0 24.6 118 31.4 27.9 113 Marquette 8760 7.8 -M * 9.4 -M * Sylvan Lake 8420 23.2 19.9 117 25.0 22.8 110 Sylvan Road 7120 11.6 10.3 113 -M 17.0 * Younts Peak 8350 18.3 14.7 124 15.0 16.1 93 ----- ----- Basin Index (%) 115 109 POWDER RIVER Bear Trap Meadow 8200 8.0 4.5 178 9.6 9.0 107 Cloud Peak Reservoir 9860 15.4 15.4 100 14.0 14.0 100 Grave Springs 8550 9.9 9.6 103 10.6 11.1 95 Hansen Sawmill 8360 7.7 6.0 128 9.6 9.0 107 Middle Powder 7760 13.0 12.4 105 12.3 12.3 100 Powder River Pass 9480 12.6 10.2 124 12.9 13.1 98 Soldier Park 8720 7.4 -M * 9.6 -M * ----- ----- Basin Index (%) 115 101 TONGUE RIVER Big Goose 7990 9.4 9.8 96 10.6 12.1 88 Bone Springs Div 9350 18.7 16.9 111 15.0 16.1 93 Burgess Junction 7880 11.5 12.2 94 12.8 12.9 99 Dome Lake 8880 14.2 12.0 118 10.5 14.3 73 Little Goose 8870 11.7 -M * 9.0 -M * Sucker Creek 8880 13.8 12.6 110 13.4 15.1 89 Tie Creek 6870 7.8 5.0 156 13.4 12.2 110 ----- ----- Basin Index (%) 110 92 BELLE FOURCHE Blind Park 6890 3.7 5.5 67 8.6 12.4 69 Cole Canyon 5910 -M 3.5 * -M 9.9 * ----- ----- Basin Index (%) 67 69 CHEYENNE RIVER BASIN Blind Park 6890 3.7 5.5 67 8.6 12.4 69 North Rapid Creek 6130 5.8 5.7 102 9.3 10.3 90 ----- ----- Basin Index (%) 85 79 UPPER N. PLATTE Arapaho Ridge 10960 22.9 21.6 106 22.5 23.7 95 Blackhall Mtn 9820 30.8 -M * 29.8 -M * Columbine 9160 26.8 22.2 121 -M 26.2 * Divide Peak 8880 20.3 20.2 100 21.7 22.2 98 Joe Wright 10120 21.6 22.0 98 27.7 26.8 103 Laprele Creek 8375 12.0 9.2 130 13.1 13.1 100 Med Bow 10500 43.1 -M * 35.9 -M * Never Summer 10280 20.9 20.6 101 15.8 -M * North French Creek 10130 33.4 31.5 106 32.4 27.6 117 Old Battle 10000 32.4 32.2 101 30.2 36.0 84 Rawah 9020 9.8 9.8 100 14.6 15.0 97 Sage Creek Basin 7850 12.0 9.4 128 12.4 15.0 83 Sand Lake 10050 30.1 30.2 100 27.4 25.8 106 South Brush Creek 8440 10.3 11.2 92 13.2 15.9 83 Tower 10500 47.2 47.4 100 43.0 41.0 105 Webber Springs 9250 22.0 23.5 94 25.4 27.6 92 Whiskey Park 8950 32.0 27.2 118 31.9 28.7 111 Willow Creek Pass 9540 14.3 12.6 113 13.4 14.0 96 Zirkel 9340 25.6 24.3 105 31.5 29.2 108 ----- ----- Basin Index (%) 105 100 SWEETWATER Deer Park 9700 15.0 16.1 93 14.2 20.6 69 Larsen Creek 9000 6.5 10.9 60 9.7 -M * South Pass 9040 12.5 15.8 79 11.8 18.0 66 ----- ----- Basin Index (%) 79 67 LOWER N. PLATTE Casper Mtn. 7900 16.2 14.5 112 12.0 15.9 75 Laprele Creek 8375 12.0 9.2 130 13.1 13.1 100 Reno Hill 8400 17.2 14.2 121 16.4 16.4 100 Windy Peak 7900 9.0 7.5 120 8.9 11.1 80 ----- ----- Basin Index (%) 120 89 LARAMIE RIVER Brooklyn Lake 10240 27.7 22.3 124 26.7 21.9 122 Cinnabar Park 9574 22.7 21.2 107 25.7 24.9 103 Crow Creek 8330 6.4 4.8 133 11.0 11.4 96 Deadman Hill 10220 19.4 16.6 117 17.3 18.1 96 Rawah 9020 9.8 9.8 100 14.6 15.0 97 Roach 9700 14.7 16.5 89 15.9 19.9 80 Windy Peak 7900 9.0 7.5 120 8.9 11.1 80 ----- ----- Basin Index (%) 111 98 S. PLATTE Black Mountain 8920 9.8 -M * 13.7 -M * Crow Creek 8330 6.4 4.8 133 11.0 11.4 96 Deadman Hill 10220 19.4 16.6 117 17.3 18.1 96 ----- ----- Basin Index (%) 121 96 LITTLE SNAKE RIVER Battle Mountain 7440 8.4 7.2 117 14.0 15.5 90 Divide Peak 8880 20.3 20.2 100 21.7 22.2 98 Elk River 8700 18.6 17.5 106 18.1 20.7 87 Little Snake River 8915 26.5 25.9 102 -M 30.7 * Old Battle 10000 32.4 32.2 101 30.2 36.0 84 Sage Creek Basin 7850 12.0 9.4 128 12.4 15.0 83 Sandstone RS 8150 14.5 12.1 120 16.0 18.9 85 Whiskey Park 8950 32.0 27.2 118 31.9 28.7 111 ----- ----- Basin Index (%) 109 92 UPPER GREEN RIVER Big Sandy Opening 9080 10.5 12.9 81 9.3 13.6 68 Blind Bull Sum 8650 27.1 23.8 114 16.5 19.7 84 East Rim Divide 7930 11.0 10.0 110 10.2 11.9 86 Elkhart Park G.S. 9400 10.4 12.1 86 10.6 13.6 78 Gros Ventre Summit 8750 13.1 12.9 102 13.1 13.2 99 Gunsight Pass 9820 13.9 13.5 103 13.9 14.2 98 Indian Creek 9425 23.6 24.1 98 16.9 23.0 73 Kendall R.S. 7740 10.2 10.1 101 11.5 14.4 80 Loomis Park 8240 14.9 13.7 109 19.0 17.5 109 New Fork Lake 8340 10.3 9.7 106 9.3 10.9 85 Pocket Creek 9360 -M -M * 8.6 -M * Snider Basin 8060 11.6 11.8 98 14.0 14.4 97 Spring Creek Divide 9000 27.1 23.1 117 25.4 24.2 105 Triple Peak 8500 28.2 20.0 141 27.1 25.6 106 ----- ----- Basin Index (%) 107 91 LOWER GREEN RIVER Blacks Fork Jct 8869 -M -M * -M -M * Buck Pasture 9632 18.3 -M * 18.1 -M * EF Blacks Fork GS 9360 13.5 -M * 12.1 -M * Hams Fork 7840 10.6 8.9 119 11.7 11.6 101 Hewinta 9500 10.9 10.0 109 14.6 14.5 101 Hickerson Park 9122 10.2 6.9 148 12.1 10.7 113 Hole-in-Rock 9168 9.7 7.0 139 11.5 10.1 114 Indian Creek 9425 23.6 24.1 98 16.9 23.0 73 Kelley R.S. 8180 15.2 13.9 109 16.5 18.4 90 Spirit Lk 10235 17.7 -M * 18.8 -M * Steel Creek Park 10158 17.8 16.1 111 18.4 17.2 107 ----- ----- Basin Index (%) 113 96 UPPER BEAR RIVER Bear River RS 8777 8.6 -M * 11.8 -M * Bug Lake 7987 18.9 19.2 98 18.8 19.9 94 Burts Miller Ranch 8000 2.5 -M * 7.3 -M * Chalk Creek #1 9171 20.6 24.8 83 19.6 26.0 75 Hayden Fork 9130 15.0 14.2 106 21.1 21.7 97 Kelley R.S. 8180 15.2 13.9 109 16.5 18.4 90 Lily Lake 9133 12.1 12.6 96 13.5 17.7 76 Monte Cristo 8932 28.9 27.8 104 26.8 26.7 100 Salt River Summit 7640 15.2 11.5 132 16.3 17.0 96 Spring Creek Divide 9000 27.1 23.1 117 25.4 24.2 105 ----- ----- Basin Index (%) 104 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.