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 28 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 14.7 10.2 144 21.0 22.4 94 Black Bear 8170 -M 37.1 * 34.5 41.2 84 Blind Bull Sum 8650 29.9 23.9 125 17.8 20.9 85 Cottonwood Creek 7670 24.8 16.4 151 32.3 26.9 120 East Rim Divide 7930 7.7 8.6 90 11.6 12.6 92 Grand Targhee 9260 47.8 43.8 109 34.1 33.9 101 Granite Creek 6770 16.4 8.8 186 -M 20.9 * Grassy Lake 7265 31.4 29.9 105 36.4 38.7 94 Gros Ventre Summit 8750 14.3 12.0 119 15.0 14.3 105 Gunsight Pass 9820 15.4 13.2 117 15.8 15.7 101 Lewis Lake Divide 7850 27.6 30.5 90 34.0 38.0 89 Phillips Bench 8200 -M 25.6 * -M 30.2 * Salt River Summit 7640 11.7 8.2 143 17.5 18.1 97 Snake River Station 6920 14.4 8.9 162 23.6 24.3 97 Spring Creek Divide 9000 28.6 24.1 119 27.0 25.8 105 Thumb Divide 7980 15.6 13.7 114 18.5 20.6 90 Togwotee Pass 9580 29.9 24.7 121 30.0 26.8 112 Two Ocean Plateau 9240 35.4 29.4 120 28.7 29.6 97 Willow Creek 8080 38.7 24.5 158 40.1 36.9 109 Younts Peak 8350 18.0 15.2 118 16.4 17.3 95 ----- ----- Basin Index (%) 122 98 MADISON-GALLATIN Black Bear 8170 -M 37.1 * 34.5 41.2 84 Canyon 7870 14.4 11.3 127 16.5 17.7 93 Madison Plateau 7750 20.6 22.1 93 21.1 28.4 74 West Yellowstone 6700 3.3 3.7 89 9.6 15.6 62 Whiskey Creek 6800 14.2 15.2 93 18.8 22.0 85 ----- ----- Basin Index (%) 100 80 YELLOWSTONE Beartooth Lake 9360 25.4 23.2 109 23.8 21.6 110 Burnt Mtn 5880 5.2 .0 * 16.2 15.2 107 Canyon 7870 14.4 11.3 127 16.5 17.7 93 Cole Creek 7850 19.7 16.3 121 16.1 15.8 102 Evening Star 9200 29.4 24.8 119 32.9 29.9 110 Fisher Creek 9100 35.6 33.1 108 36.2 34.6 105 Northeast Entrance 7350 6.9 4.4 157 13.9 13.5 103 Parker Peak 9400 29.5 21.7 136 26.1 19.6 133 Sylvan Lake 8420 21.6 20.3 106 26.6 24.6 108 Thumb Divide 7980 15.6 13.7 114 18.5 20.6 90 Two Ocean Plateau 9240 35.4 29.4 120 28.7 29.6 97 White Mill 8700 28.8 23.8 121 23.8 25.8 92 Wolverine 7650 9.8 4.2 233 14.7 13.5 109 Younts Peak 8350 18.0 15.2 118 16.4 17.3 95 ----- ----- Basin Index (%) 122 104 WIND RIVER Burroughs Creek 8750 12.4 -M * 15.6 -M * Castle Creek 8400 2.2 -M * 8.3 -M * Cold Springs 9630 5.6 2.0 280 9.2 12.0 77 Deer Park 9700 13.6 16.3 83 16.1 23.0 70 Hobbs Park 10100 14.7 15.8 93 14.5 16.3 89 Kirwin 9550 13.0 10.3 126 12.4 13.4 93 Little Warm 9370 12.8 9.1 141 11.8 14.8 80 Owl Creek 8975 3.1 1.7 182 8.6 7.6 113 South Pass 9040 11.9 15.1 79 13.5 20.0 68 St. Lawrence Alt 8620 2.2 3.8 58 9.2 11.2 82 Togwotee Pass 9580 29.9 24.7 121 30.0 26.8 112 Townsend Creek 8700 10.3 8.2 126 12.5 14.6 86 ----- ----- Basin Index (%) 109 86 BIGHORN BASIN Bald Mtn. 9380 23.0 20.5 112 18.3 19.2 95 Bear Trap Meadow 8200 5.3 1.5 353 10.6 10.2 104 Bone Springs Div 9350 18.5 16.5 112 16.4 17.7 93 Grave Springs 8550 9.1 9.2 99 11.0 12.4 89 Kirwin 9550 13.0 10.3 126 12.4 13.4 93 Marquette 8760 8.9 -M * 10.9 -M * Middle Powder 7760 12.2 12.1 101 12.8 13.8 93 Owl Creek 8975 3.1 1.7 182 8.6 7.6 113 Powder River Pass 9480 11.8 9.8 120 14.4 14.6 99 Shell Creek 9580 16.2 16.0 101 15.6 15.8 99 Timber Creek 7950 2.5 3.5 71 8.4 9.5 88 ----- ----- Basin Index (%) 113 96 SHOSHONE RIVER Blackwater 9780 26.5 24.9 106 26.1 22.9 114 Evening Star 9200 29.4 24.8 119 32.9 29.9 110 Marquette 8760 8.9 -M * 10.9 -M * Sylvan Lake 8420 21.6 20.3 106 26.6 24.6 108 Sylvan Road 7120 5.2 7.1 73 18.5 18.2 102 Younts Peak 8350 18.0 15.2 118 16.4 17.3 95 ----- ----- Basin Index (%) 109 107 POWDER RIVER Bear Trap Meadow 8200 5.3 1.5 353 10.6 10.2 104 Cloud Peak Reservoir 9860 15.1 16.5 92 15.4 16.1 96 Grave Springs 8550 9.1 9.2 99 11.0 12.4 89 Hansen Sawmill 8360 6.2 3.6 172 10.3 10.5 98 Middle Powder 7760 12.2 12.1 101 12.8 13.8 93 Powder River Pass 9480 11.8 9.8 120 14.4 14.6 99 Soldier Park 8720 5.7 -M * 10.3 -M * ----- ----- Basin Index (%) 113 96 TONGUE RIVER Big Goose 7990 9.3 9.1 102 11.1 13.6 82 Bone Springs Div 9350 18.5 16.5 112 16.4 17.7 93 Burgess Junction 7880 12.5 12.2 102 13.7 14.4 95 Dome Lake 8880 13.2 11.7 113 11.6 16.0 72 Little Goose 8870 11.6 -M * -M -M * Sucker Creek 8880 14.1 12.5 113 15.1 16.9 89 Tie Creek 6870 5.5 2.8 196 14.2 13.8 103 ----- ----- Basin Index (%) 113 89 BELLE FOURCHE Blind Park 6890 .2 2.3 9 9.4 13.9 68 Cole Canyon 5910 -M .3 * -M 11.4 * ----- ----- Basin Index (%) 9 68 CHEYENNE RIVER BASIN Blind Park 6890 .2 2.3 9 9.4 13.9 68 North Rapid Creek 6130 2.4 2.3 104 9.3 11.9 78 ----- ----- Basin Index (%) 57 72 UPPER N. PLATTE Arapaho Ridge 10960 25.0 22.3 112 25.5 25.8 99 Blackhall Mtn 9820 32.9 -M * 32.7 -M * Columbine 9160 27.2 19.5 139 32.9 28.1 117 Divide Peak 8880 19.3 18.0 107 24.1 23.9 101 Joe Wright 10120 25.7 23.5 109 30.9 29.3 105 Laprele Creek 8375 9.3 6.9 135 14.3 14.7 97 Med Bow 10500 47.0 -M * 39.4 -M * Never Summer 10280 23.2 21.5 108 18.4 -M * North French Creek 10130 37.1 33.0 112 35.8 30.2 119 Old Battle 10000 35.2 34.6 102 33.2 38.6 86 Rawah 9020 10.3 7.4 139 16.8 17.0 99 Sage Creek Basin 7850 7.9 1.4 564 13.6 15.9 86 Sand Lake 10050 33.7 31.2 108 30.6 28.5 107 South Brush Creek 8440 9.0 9.9 91 14.6 17.5 83 Tower 10500 44.4 49.8 89 47.3 44.1 107 Webber Springs 9250 21.7 22.0 99 28.3 29.5 96 Whiskey Park 8950 32.5 25.9 125 34.5 30.9 112 Willow Creek Pass 9540 16.2 13.8 117 15.7 15.4 102 Zirkel 9340 -M 21.6 * -M 30.5 * ----- ----- Basin Index (%) 111 102 SWEETWATER Deer Park 9700 13.6 16.3 83 16.1 23.0 70 Larsen Creek 9000 1.6 9.5 17 10.9 -M * South Pass 9040 11.9 15.1 79 13.5 20.0 68 ----- ----- Basin Index (%) 66 69 LOWER N. PLATTE Casper Mtn. 7900 15.1 14.1 107 13.5 17.6 77 Laprele Creek 8375 9.3 6.9 135 14.3 14.7 97 Reno Hill 8400 17.7 13.4 132 19.8 18.4 108 Windy Peak 7900 7.2 5.1 141 10.6 12.7 83 ----- ----- Basin Index (%) 125 92 LARAMIE RIVER Brooklyn Lake 10240 30.3 23.1 131 30.5 24.2 126 Cinnabar Park 9574 23.8 20.0 119 29.1 26.6 109 Crow Creek 8330 3.8 .0 * 13.3 13.1 102 Deadman Hill 10220 21.9 18.6 118 19.7 20.2 98 Rawah 9020 10.3 7.4 139 16.8 17.0 99 Roach 9700 15.8 17.1 92 18.8 21.9 86 Windy Peak 7900 7.2 5.1 141 10.6 12.7 83 ----- ----- Basin Index (%) 124 102 S. PLATTE Black Mountain 8920 9.6 -M * 16.4 -M * Crow Creek 8330 3.8 .0 * 13.3 13.1 102 Deadman Hill 10220 21.9 18.6 118 19.7 20.2 98 ----- ----- Basin Index (%) 138* 99 LITTLE SNAKE RIVER Battle Mountain 7440 4.1 .6 683* 15.6 16.9 92 Divide Peak 8880 19.3 18.0 107 24.1 23.9 101 Elk River 8700 15.5 14.1 110 19.9 22.3 89 Little Snake River 8915 26.2 22.9 114 35.7 32.1 111 Old Battle 10000 35.2 34.6 102 33.2 38.6 86 Sage Creek Basin 7850 7.9 1.4 564 13.6 15.9 86 Sandstone RS 8150 10.7 7.2 149 17.5 20.4 86 Whiskey Park 8950 32.5 25.9 125 34.5 30.9 112 ----- ----- Basin Index (%) 121 97 UPPER GREEN RIVER Big Sandy Opening 9080 10.0 11.6 86 10.3 14.9 69 Blind Bull Sum 8650 29.9 23.9 125 17.8 20.9 85 East Rim Divide 7930 7.7 8.6 90 11.6 12.6 92 Elkhart Park G.S. 9400 10.7 11.7 91 11.7 14.7 80 Gros Ventre Summit 8750 14.3 12.0 119 15.0 14.3 105 Gunsight Pass 9820 15.4 13.2 117 15.8 15.7 101 Indian Creek 9425 23.0 23.7 97 18.1 24.6 74 Kendall R.S. 7740 8.4 5.6 150 13.6 15.2 89 Loomis Park 8240 14.3 11.4 125 20.9 18.6 112 New Fork Lake 8340 8.2 6.9 119 10.5 11.8 89 Pocket Creek 9360 -M -M * 9.6 -M * Snider Basin 8060 7.2 9.9 73 15.1 15.3 99 Spring Creek Divide 9000 28.6 24.1 119 27.0 25.8 105 Triple Peak 8500 27.5 18.5 149 29.8 27.4 109 ----- ----- Basin Index (%) 113 94 LOWER GREEN RIVER Blacks Fork Jct 8869 5.0 -M * 13.4 -M * Buck Pasture 9632 15.5 -M * 19.3 -M * EF Blacks Fork GS 9360 11.4 -M * 13.6 -M * Hams Fork 7840 5.5 4.1 134 12.7 12.8 99 Hewinta 9500 8.2 5.7 144 16.3 15.8 103 Hickerson Park 9122 6.4 4.9 131 12.5 11.8 106 Hole-in-Rock 9168 6.2 3.8 163 12.6 11.2 112 Indian Creek 9425 23.0 23.7 97 18.1 24.6 74 Kelley R.S. 8180 12.5 11.8 106 17.6 19.8 89 Spirit Lk 10235 16.1 -M * 19.4 -M * Steel Creek Park 10158 17.9 16.8 107 20.0 18.7 107 ----- ----- Basin Index (%) 113 96 UPPER BEAR RIVER Bear River RS 8777 2.8 -M * 12.7 -M * Bug Lake 7987 16.1 15.9 101 19.8 21.3 93 Burts Miller Ranch 8000 .0 -M * 7.8 -M * Chalk Creek #1 9171 18.9 24.6 77 21.0 27.9 75 Hayden Fork 9130 10.6 9.9 107 22.4 23.3 96 Kelley R.S. 8180 12.5 11.8 106 17.6 19.8 89 Lily Lake 9133 10.0 9.8 102 14.1 19.2 73 Monte Cristo 8932 27.0 27.2 99 28.0 28.7 98 Salt River Summit 7640 11.7 8.2 143 17.5 18.1 97 Spring Creek Divide 9000 28.6 24.1 119 27.0 25.8 105 ----- ----- Basin Index (%) 103 91 ----------------------------------------------------------------------------- -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.