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 2 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 17.3 14.9 116 18.0 20.3 89 Black Bear 8170 34.8 36.6 95 32.0 36.8 87 Blind Bull Sum 8650 26.0 22.6 115 15.6 18.9 83 Cottonwood Creek 7670 27.0 21.3 127 28.9 23.8 121 East Rim Divide 7930 11.8 10.0 118 9.6 11.4 84 Grand Targhee 9260 41.6 36.9 113 28.4 29.9 95 Granite Creek 6770 17.5 14.8 118 -M 19.2 * Grassy Lake 7265 33.4 31.6 106 33.1 34.8 95 Gros Ventre Summit 8750 12.5 13.0 96 12.1 12.5 97 Gunsight Pass 9820 13.3 13.4 99 13.1 13.3 98 Lewis Lake Divide 7850 26.6 29.5 90 30.4 34.3 89 Phillips Bench 8200 29.6 24.4 121 28.3 27.3 104 Salt River Summit 7640 15.9 12.9 123 15.8 16.1 98 Snake River Station 6920 18.0 15.3 118 21.1 21.7 97 Spring Creek Divide 9000 26.6 22.5 118 24.6 23.1 106 Thumb Divide 7980 17.0 14.8 115 16.4 17.9 92 Togwotee Pass 9580 27.0 21.7 124 26.1 23.4 112 Two Ocean Plateau 9240 30.7 25.6 120 24.3 26.3 92 Willow Creek 8080 37.6 28.0 134 35.0 32.4 108 Younts Peak 8350 14.2 14.2 100 -M 15.2 * ----- ----- Basin Index (%) 113 97 MADISON-GALLATIN Black Bear 8170 34.8 36.6 95 32.0 36.8 87 Canyon 7870 15.0 12.4 121 15.2 15.7 97 Madison Plateau 7750 22.2 21.4 104 19.6 25.4 77 West Yellowstone 6700 11.6 10.2 114 9.3 13.6 68 Whiskey Creek 6800 15.6 15.0 104 17.6 19.4 91 ----- ----- Basin Index (%) 104 84 YELLOWSTONE Beartooth Lake 9360 23.2 21.1 110 21.4 19.0 113 Burnt Mtn 5880 8.8 4.4 200 13.9 12.3 113 Canyon 7870 15.0 12.4 121 15.2 15.7 97 Cole Creek 7850 17.1 13.7 125 13.4 12.1 111 Evening Star 9200 27.6 23.9 115 29.2 26.3 111 Fisher Creek 9100 32.4 30.4 107 33.0 30.5 108 Northeast Entrance 7350 11.1 9.5 117 12.6 11.8 107 Parker Peak 9400 -M 18.9 * -M 17.0 * Sylvan Lake 8420 21.8 19.2 114 23.5 21.5 109 Thumb Divide 7980 17.0 14.8 115 16.4 17.9 92 Two Ocean Plateau 9240 30.7 25.6 120 24.3 26.3 92 White Mill 8700 26.2 21.7 121 21.6 22.8 95 Wolverine 7650 13.0 9.2 141 12.9 11.8 109 Younts Peak 8350 14.2 14.2 100 -M 15.2 * ----- ----- Basin Index (%) 117 104 WIND RIVER Burroughs Creek 8750 12.9 -M * 14.1 -M * Castle Creek 8400 6.0 -M * 6.9 -M * Cold Springs 9630 7.5 7.1 106 6.5 9.6 68 Deer Park 9700 13.8 14.8 93 12.1 18.8 64 Hobbs Park 10100 13.5 13.5 100 11.2 12.7 88 Kirwin 9550 11.6 9.5 122 10.1 11.1 91 Little Warm 9370 12.4 10.2 122 9.8 12.3 80 Owl Creek 8975 6.6 5.6 118 7.0 5.7 123 South Pass 9040 12.0 14.9 81 10.3 16.7 62 St. Lawrence Alt 8620 5.3 6.8 78 7.2 8.6 84 Togwotee Pass 9580 27.0 21.7 124 26.1 23.4 112 Townsend Creek 8700 9.4 9.1 103 9.2 11.4 81 ----- ----- Basin Index (%) 105 84 BIGHORN BASIN Bald Mtn. 9380 20.1 18.8 107 15.3 16.4 93 Bear Trap Meadow 8200 8.7 5.1 171 8.7 8.1 107 Bone Springs Div 9350 17.1 16.1 106 13.9 14.9 93 Grave Springs 8550 9.8 9.0 109 10.1 10.1 100 Kirwin 9550 11.6 9.5 122 10.1 11.1 91 Marquette 8760 6.9 -M * 8.6 -M * Middle Powder 7760 12.2 11.5 106 11.5 11.2 103 Owl Creek 8975 6.6 5.6 118 7.0 5.7 123 Powder River Pass 9480 12.1 10.0 121 12.0 12.0 100 Shell Creek 9580 14.6 14.7 99 13.6 13.2 103 Timber Creek 7950 6.0 4.8 125 6.9 7.1 97 ----- ----- Basin Index (%) 113 99 SHOSHONE RIVER Blackwater 9780 22.2 22.2 100 22.2 19.8 112 Evening Star 9200 27.6 23.9 115 29.2 26.3 111 Marquette 8760 6.9 -M * 8.6 -M * Sylvan Lake 8420 21.8 19.2 114 23.5 21.5 109 Sylvan Road 7120 12.6 11.1 114 -M 16.1 * Younts Peak 8350 14.2 14.2 100 -M 15.2 * ----- ----- Basin Index (%) 109 111 POWDER RIVER Bear Trap Meadow 8200 8.7 5.1 171 8.7 8.1 107 Cloud Peak Reservoir 9860 14.0 14.2 99 13.0 12.7 102 Grave Springs 8550 9.8 9.0 109 10.1 10.1 100 Hansen Sawmill 8360 7.4 6.3 117 8.5 8.2 104 Middle Powder 7760 12.2 11.5 106 11.5 11.2 103 Powder River Pass 9480 12.1 10.0 121 12.0 12.0 100 Soldier Park 8720 6.9 -M * 8.5 -M * ----- ----- Basin Index (%) 114 102 TONGUE RIVER Big Goose 7990 8.6 9.1 95 9.3 10.8 86 Bone Springs Div 9350 17.1 16.1 106 13.9 14.9 93 Burgess Junction 7880 11.2 11.4 98 12.1 11.8 103 Dome Lake 8880 13.3 11.6 115 9.2 13.0 71 Little Goose 8870 10.6 -M * 8.1 -M * Sucker Creek 8880 13.2 11.5 115 12.3 13.8 89 Tie Creek 6870 8.1 5.5 147 12.4 11.0 113 ----- ----- Basin Index (%) 110 92 BELLE FOURCHE Blind Park 6890 6.0 7.2 83 8.2 11.3 73 Cole Canyon 5910 -M 5.8 * -M 8.9 * ----- ----- Basin Index (%) 83 73 CHEYENNE RIVER BASIN Blind Park 6890 6.0 7.2 83 8.2 11.3 73 North Rapid Creek 6130 7.2 6.8 106 8.2 9.3 88 ----- ----- Basin Index (%) 94 80 UPPER N. PLATTE Arapaho Ridge 10960 22.8 20.0 114 22.0 21.5 102 Blackhall Mtn 9820 30.6 -M * 28.8 -M * Columbine 9160 31.2 23.0 136 28.4 24.6 115 Divide Peak 8880 21.1 19.6 108 21.4 20.7 103 Joe Wright 10120 -M 20.4 * -M 24.8 * Laprele Creek 8375 12.4 9.5 131 12.6 11.9 106 Med Bow 10500 43.6 -M * 35.1 -M * Never Summer 10280 19.8 19.8 100 14.9 -M * North French Creek 10130 33.4 28.2 118 31.8 25.8 123 Old Battle 10000 31.9 30.0 106 29.1 33.9 86 Rawah 9020 11.8 10.4 113 14.1 13.7 103 Sage Creek Basin 7850 15.4 12.6 122 12.2 14.0 87 Sand Lake 10050 29.7 27.8 107 26.9 23.8 113 South Brush Creek 8440 12.8 12.2 105 12.9 14.7 88 Tower 10500 45.9 44.4 103 40.9 38.3 107 Webber Springs 9250 22.7 23.0 99 24.9 25.8 97 Whiskey Park 8950 32.9 26.1 126 31.1 27.0 115 Willow Creek Pass 9540 13.3 11.8 113 12.6 12.9 98 Zirkel 9340 29.1 26.4 110 30.7 27.5 112 ----- ----- Basin Index (%) 112 105 SWEETWATER Deer Park 9700 13.8 14.8 93 12.1 18.8 64 Larsen Creek 9000 6.8 12.1 56 8.7 -M * South Pass 9040 12.0 14.9 81 10.3 16.7 62 ----- ----- Basin Index (%) 78 63 LOWER N. PLATTE Casper Mtn. 7900 16.3 13.6 120 11.4 14.1 81 Laprele Creek 8375 12.4 9.5 131 12.6 11.9 106 Reno Hill 8400 16.7 13.4 125 16.7 14.6 114 Windy Peak 7900 9.9 7.8 127 8.7 10.1 86 ----- ----- Basin Index (%) 125 97 LARAMIE RIVER Brooklyn Lake 10240 27.7 20.3 136 26.2 20.3 129 Cinnabar Park 9574 23.1 20.2 114 25.3 23.2 109 Crow Creek 8330 7.5 6.9 109 10.6 10.3 103 Deadman Hill 10220 18.5 15.7 118 16.3 16.5 99 Rawah 9020 11.8 10.4 113 14.1 13.7 103 Roach 9700 15.2 15.8 96 15.8 18.4 86 Windy Peak 7900 9.9 7.8 127 8.7 10.1 86 ----- ----- Basin Index (%) 117 104 S. PLATTE Black Mountain 8920 10.3 -M * 13.0 -M * Crow Creek 8330 7.5 6.9 109 10.6 10.3 103 Deadman Hill 10220 18.5 15.7 118 16.3 16.5 99 ----- ----- Basin Index (%) 115 100 LITTLE SNAKE RIVER Battle Mountain 7440 12.2 10.5 116 14.0 14.6 96 Divide Peak 8880 21.1 19.6 108 21.4 20.7 103 Elk River 8700 20.3 18.7 109 17.6 19.4 91 Little Snake River 8915 28.0 23.5 119 32.3 28.8 112 Old Battle 10000 31.9 30.0 106 29.1 33.9 86 Sage Creek Basin 7850 15.4 12.6 122 12.2 14.0 87 Sandstone RS 8150 16.8 13.0 129 15.9 17.8 89 Whiskey Park 8950 32.9 26.1 126 31.1 27.0 115 ----- ----- Basin Index (%) 116 99 UPPER GREEN RIVER Big Sandy Opening 9080 10.0 12.4 81 8.6 12.7 68 Blind Bull Sum 8650 26.0 22.6 115 15.6 18.9 83 East Rim Divide 7930 11.8 10.0 118 9.6 11.4 84 Elkhart Park G.S. 9400 10.5 12.1 87 10.3 12.8 80 Gros Ventre Summit 8750 12.5 13.0 96 12.1 12.5 97 Gunsight Pass 9820 13.3 13.4 99 13.1 13.3 98 Indian Creek 9425 23.5 24.1 98 16.5 21.8 76 Kendall R.S. 7740 11.0 11.4 96 11.0 13.8 80 Loomis Park 8240 14.8 14.2 104 17.7 16.8 105 New Fork Lake 8340 10.6 10.4 102 -M 10.4 * Pocket Creek 9360 -M -M * 8.1 -M * Snider Basin 8060 13.2 12.3 107 13.9 13.8 101 Spring Creek Divide 9000 26.6 22.5 118 24.6 23.1 106 Triple Peak 8500 27.1 21.8 124 26.4 24.5 108 ----- ----- Basin Index (%) 105 92 LOWER GREEN RIVER Blacks Fork Jct 8869 8.4 -M * 12.1 -M * Buck Pasture 9632 18.1 -M * 17.1 -M * EF Blacks Fork GS 9360 14.7 -M * 11.9 -M * Hams Fork 7840 12.7 10.9 117 11.4 11.0 104 Hewinta 9500 11.7 10.9 107 14.7 13.5 109 Hickerson Park 9122 10.7 7.6 141 11.7 9.8 119 Hole-in-Rock 9168 11.5 6.9 167 11.5 9.2 125 Indian Creek 9425 23.5 24.1 98 16.5 21.8 76 Kelley R.S. 8180 15.9 15.0 106 16.4 17.5 94 Spirit Lk 10235 17.9 -M * 18.4 -M * Steel Creek Park 10158 17.3 15.4 112 17.9 15.8 113 ----- ----- Basin Index (%) 114 102 UPPER BEAR RIVER Bear River RS 8777 10.4 -M * 11.6 -M * Bug Lake 7987 19.7 18.2 108 18.6 18.8 99 Burts Miller Ranch 8000 6.3 -M * 7.3 -M * Chalk Creek #1 9171 21.0 23.6 89 19.2 24.3 79 Hayden Fork 9130 16.8 15.2 111 20.4 20.3 100 Kelley R.S. 8180 15.9 15.0 106 16.4 17.5 94 Lily Lake 9133 12.4 12.2 102 13.0 16.5 79 Monte Cristo 8932 29.8 26.6 112 26.2 25.1 104 Salt River Summit 7640 15.9 12.9 123 15.8 16.1 98 Spring Creek Divide 9000 26.6 22.5 118 24.6 23.1 106 ----- ----- Basin Index (%) 108 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.