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 SUNDAY: APRIL 5 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 17.6 15.2 116 18.3 20.5 89 Black Bear 8170 35.0 37.1 94 32.2 37.4 86 Blind Bull Sum 8650 26.0 23.1 113 15.7 19.2 82 Cottonwood Creek 7670 27.1 21.1 128 29.0 24.2 120 East Rim Divide 7930 12.1 10.2 119 9.8 11.5 85 Grand Targhee 9260 41.9 37.9 111 28.6 30.4 94 Granite Creek 6770 17.3 14.7 118 16.4 19.4 85 Grassy Lake 7265 33.8 31.6 107 33.6 35.3 95 Gros Ventre Summit 8750 12.5 13.0 96 12.1 12.7 95 Gunsight Pass 9820 13.4 13.6 99 13.2 13.5 98 Lewis Lake Divide 7850 27.1 29.7 91 30.7 34.7 88 Phillips Bench 8200 -M 24.9 * -M 27.6 * Salt River Summit 7640 16.1 12.9 125 16.1 16.4 98 Snake River Station 6920 18.1 15.0 121 21.4 22.0 97 Spring Creek Divide 9000 26.7 22.5 119 24.9 23.4 106 Thumb Divide 7980 17.3 14.7 118 16.5 18.2 91 Togwotee Pass 9580 27.4 21.9 125 26.6 23.8 112 Two Ocean Plateau 9240 31.2 25.8 121 24.4 26.6 92 Willow Creek 8080 38.1 28.3 135 35.6 33.0 108 Younts Peak 8350 17.9 14.3 125 14.2 15.4 92 ----- ----- Basin Index (%) 113 96 MADISON-GALLATIN Black Bear 8170 35.0 37.1 94 32.2 37.4 86 Canyon 7870 15.1 12.5 121 15.4 15.9 97 Madison Plateau 7750 22.5 21.4 105 19.8 25.8 77 West Yellowstone 6700 11.9 9.9 120 9.3 13.9 67 Whiskey Creek 6800 15.8 14.9 106 17.8 19.7 90 ----- ----- Basin Index (%) 105 84 YELLOWSTONE Beartooth Lake 9360 23.6 21.2 111 22.0 19.3 114 Burnt Mtn 5880 8.9 4.6 193 14.5 12.7 114 Canyon 7870 15.1 12.5 121 15.4 15.9 97 Cole Creek 7850 17.5 14.3 122 13.6 12.6 108 Evening Star 9200 27.9 23.8 117 30.0 26.7 112 Fisher Creek 9100 32.9 30.9 106 33.6 31.0 108 Northeast Entrance 7350 11.0 9.2 120 12.7 11.9 107 Parker Peak 9400 -M 19.2 * -M 17.2 * Sylvan Lake 8420 22.0 19.3 114 23.7 21.8 109 Thumb Divide 7980 17.3 14.7 118 16.5 18.2 91 Two Ocean Plateau 9240 31.2 25.8 121 24.4 26.6 92 White Mill 8700 26.5 22.0 120 22.1 23.2 95 Wolverine 7650 13.0 9.4 138 13.1 11.9 110 Younts Peak 8350 17.9 14.3 125 14.2 15.4 92 ----- ----- Basin Index (%) 119 103 WIND RIVER Burroughs Creek 8750 13.1 -M * 13.8 -M * Castle Creek 8400 6.2 -M * 7.0 -M * Cold Springs 9630 7.8 6.9 113 7.2 9.8 73 Deer Park 9700 14.1 15.2 93 12.9 19.4 66 Hobbs Park 10100 13.7 13.9 99 11.8 13.2 89 Kirwin 9550 11.9 9.6 124 10.5 11.3 93 Little Warm 9370 12.6 10.2 124 9.9 12.6 79 Owl Creek 8975 6.8 5.8 117 7.2 5.9 122 South Pass 9040 12.4 15.1 82 10.9 17.1 64 St. Lawrence Alt 8620 5.6 6.8 82 7.3 8.8 83 Togwotee Pass 9580 27.4 21.9 125 26.6 23.8 112 Townsend Creek 8700 9.7 9.4 103 9.8 11.8 83 ----- ----- Basin Index (%) 106 85 BIGHORN BASIN Bald Mtn. 9380 20.3 19.0 107 15.7 16.6 95 Bear Trap Meadow 8200 8.9 5.0 178 9.4 8.3 113 Bone Springs Div 9350 17.3 16.6 104 14.3 15.2 94 Grave Springs 8550 10.0 9.2 109 10.3 10.3 100 Kirwin 9550 11.9 9.6 124 10.5 11.3 93 Marquette 8760 7.1 -M * 8.7 -M * Middle Powder 7760 12.6 11.8 107 11.8 11.4 104 Owl Creek 8975 6.8 5.8 117 7.2 5.9 122 Powder River Pass 9480 12.1 10.1 120 12.3 12.3 100 Shell Creek 9580 14.7 14.8 99 13.8 13.5 102 Timber Creek 7950 6.0 4.9 122 7.0 7.2 97 ----- ----- Basin Index (%) 113 100 SHOSHONE RIVER Blackwater 9780 22.6 22.4 101 22.7 20.1 113 Evening Star 9200 27.9 23.8 117 30.0 26.7 112 Marquette 8760 7.1 -M * 8.7 -M * Sylvan Lake 8420 22.0 19.3 114 23.7 21.8 109 Sylvan Road 7120 12.6 10.9 116 -M 16.4 * Younts Peak 8350 17.9 14.3 125 14.2 15.4 92 ----- ----- Basin Index (%) 114 108 POWDER RIVER Bear Trap Meadow 8200 8.9 5.0 178 9.4 8.3 113 Cloud Peak Reservoir 9860 14.3 14.6 98 13.5 13.0 104 Grave Springs 8550 10.0 9.2 109 10.3 10.3 100 Hansen Sawmill 8360 7.6 6.2 123 8.7 8.4 104 Middle Powder 7760 12.6 11.8 107 11.8 11.4 104 Powder River Pass 9480 12.1 10.1 120 12.3 12.3 100 Soldier Park 8720 7.3 -M * 8.7 -M * ----- ----- Basin Index (%) 115 104 TONGUE RIVER Big Goose 7990 8.8 9.4 94 9.6 11.2 86 Bone Springs Div 9350 17.3 16.6 104 14.3 15.2 94 Burgess Junction 7880 11.3 11.7 97 12.4 12.1 102 Dome Lake 8880 13.5 11.7 115 9.5 13.3 71 Little Goose 8870 10.7 -M * 8.2 -M * Sucker Creek 8880 13.4 11.9 113 12.7 14.1 90 Tie Creek 6870 8.5 5.5 155 12.7 11.4 111 ----- ----- Basin Index (%) 109 92 BELLE FOURCHE Blind Park 6890 6.3 7.1 89 8.3 11.6 72 Cole Canyon 5910 -M 5.5 * -M 9.2 * ----- ----- Basin Index (%) 89 72 CHEYENNE RIVER BASIN Blind Park 6890 6.3 7.1 89 8.3 11.6 72 North Rapid Creek 6130 7.6 6.7 113 8.3 9.6 86 ----- ----- Basin Index (%) 101 78 UPPER N. PLATTE Arapaho Ridge 10960 23.0 20.6 112 22.1 22.0 100 Blackhall Mtn 9820 30.9 -M * 29.2 -M * Columbine 9160 30.3 23.3 130 28.3 25.1 113 Divide Peak 8880 21.6 19.8 109 21.8 21.1 103 Joe Wright 10120 22.6 20.8 109 26.6 25.4 105 Laprele Creek 8375 12.8 9.4 136 13.1 12.3 107 Med Bow 10500 43.6 -M * 35.2 -M * Never Summer 10280 20.2 20.2 100 15.2 -M * North French Creek 10130 33.6 29.0 116 32.0 26.3 122 Old Battle 10000 32.3 30.9 105 29.1 34.4 85 Rawah 9020 12.2 10.5 116 14.4 13.9 104 Sage Creek Basin 7850 16.0 12.4 129 12.5 14.2 88 Sand Lake 10050 30.0 28.5 105 27.2 24.3 112 South Brush Creek 8440 12.9 12.0 108 13.2 15.0 88 Tower 10500 46.2 45.3 102 40.9 39.2 104 Webber Springs 9250 23.0 23.0 100 25.2 26.3 96 Whiskey Park 8950 33.2 27.1 123 31.5 27.4 115 Willow Creek Pass 9540 13.7 12.0 114 12.8 13.2 97 Zirkel 9340 29.0 26.3 110 30.8 27.9 110 ----- ----- Basin Index (%) 111 104 SWEETWATER Deer Park 9700 14.1 15.2 93 12.9 19.4 66 Larsen Creek 9000 7.3 11.8 62 9.0 -M * South Pass 9040 12.4 15.1 82 10.9 17.1 64 ----- ----- Basin Index (%) 80 65 LOWER N. PLATTE Casper Mtn. 7900 16.7 14.2 118 11.9 14.6 82 Laprele Creek 8375 12.8 9.4 136 13.1 12.3 107 Reno Hill 8400 17.4 13.9 125 17.4 15.1 115 Windy Peak 7900 10.0 7.8 128 9.0 10.3 87 ----- ----- Basin Index (%) 126 98 LARAMIE RIVER Brooklyn Lake 10240 27.8 21.3 131 26.3 20.8 126 Cinnabar Park 9574 23.0 20.9 110 25.4 23.8 107 Crow Creek 8330 7.7 7.0 110 10.7 10.6 101 Deadman Hill 10220 18.7 15.9 118 16.5 17.0 97 Rawah 9020 12.2 10.5 116 14.4 13.9 104 Roach 9700 15.4 16.3 94 15.9 18.9 84 Windy Peak 7900 10.0 7.8 128 9.0 10.3 87 ----- ----- Basin Index (%) 115 103 S. PLATTE Black Mountain 8920 10.6 -M * 13.1 -M * Crow Creek 8330 7.7 7.0 110 10.7 10.6 101 Deadman Hill 10220 18.7 15.9 118 16.5 17.0 97 ----- ----- Basin Index (%) 115 99 LITTLE SNAKE RIVER Battle Mountain 7440 12.4 10.1 123 14.6 14.8 99 Divide Peak 8880 21.6 19.8 109 21.8 21.1 103 Elk River 8700 21.1 19.1 110 18.1 19.7 92 Little Snake River 8915 28.5 24.6 116 32.6 29.1 112 Old Battle 10000 32.3 30.9 105 29.1 34.4 85 Sage Creek Basin 7850 16.0 12.4 129 12.5 14.2 88 Sandstone RS 8150 17.2 12.8 134 16.3 18.0 91 Whiskey Park 8950 33.2 27.1 123 31.5 27.4 115 ----- ----- Basin Index (%) 116 99 UPPER GREEN RIVER Big Sandy Opening 9080 10.2 12.5 82 8.9 13.0 68 Blind Bull Sum 8650 26.0 23.1 113 15.7 19.2 82 East Rim Divide 7930 12.1 10.2 119 9.8 11.5 85 Elkhart Park G.S. 9400 10.6 12.2 87 10.4 13.0 80 Gros Ventre Summit 8750 12.5 13.0 96 12.1 12.7 95 Gunsight Pass 9820 13.4 13.6 99 13.2 13.5 98 Indian Creek 9425 23.8 24.5 97 16.6 22.2 75 Kendall R.S. 7740 10.9 11.5 95 11.0 14.0 79 Loomis Park 8240 14.8 13.9 106 18.1 17.0 106 New Fork Lake 8340 10.6 10.3 103 9.1 10.6 86 Pocket Creek 9360 -M -M * 8.4 -M * Snider Basin 8060 13.1 12.3 107 14.1 14.0 101 Spring Creek Divide 9000 26.7 22.5 119 24.9 23.4 106 Triple Peak 8500 27.2 21.9 124 26.7 24.9 107 ----- ----- Basin Index (%) 105 91 LOWER GREEN RIVER Blacks Fork Jct 8869 8.8 -M * 12.1 -M * Buck Pasture 9632 18.3 -M * 17.3 -M * EF Blacks Fork GS 9360 14.8 -M * 12.0 -M * Hams Fork 7840 12.9 10.9 118 11.7 11.2 104 Hewinta 9500 12.5 11.0 114 14.8 13.8 107 Hickerson Park 9122 11.2 7.8 144 11.8 10.1 117 Hole-in-Rock 9168 12.0 7.0 171 11.5 9.5 121 Indian Creek 9425 23.8 24.5 97 16.6 22.2 75 Kelley R.S. 8180 16.0 14.9 107 16.5 17.8 93 Spirit Lk 10235 18.0 -M * 18.4 -M * Steel Creek Park 10158 17.4 15.6 112 18.0 16.2 111 ----- ----- Basin Index (%) 115 100 UPPER BEAR RIVER Bear River RS 8777 11.3 -M * 11.6 -M * Bug Lake 7987 20.0 18.3 109 18.8 19.1 98 Burts Miller Ranch 8000 6.8 -M * 7.3 -M * Chalk Creek #1 9171 21.0 24.1 87 19.4 24.8 78 Hayden Fork 9130 17.5 15.4 114 20.4 20.7 99 Kelley R.S. 8180 16.0 14.9 107 16.5 17.8 93 Lily Lake 9133 12.5 12.5 100 13.1 16.8 78 Monte Cristo 8932 29.8 27.4 109 26.3 25.5 103 Salt River Summit 7640 16.1 12.9 125 16.1 16.4 98 Spring Creek Divide 9000 26.7 22.5 119 24.9 23.4 106 ----- ----- 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.