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 SATURDAY: APRIL 11 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 16.5 14.7 112 19.3 21.0 92 Black Bear 8170 -M 36.7 * 33.6 38.4 88 Blind Bull Sum 8650 26.5 23.5 113 16.2 19.6 83 Cottonwood Creek 7670 24.1 20.7 116 29.6 24.8 119 East Rim Divide 7930 11.0 10.2 108 10.1 11.8 86 Grand Targhee 9260 44.6 39.6 113 29.5 31.2 95 Granite Creek 6770 18.0 13.6 132 17.1 19.7 87 Grassy Lake 7265 34.8 31.4 111 34.9 36.1 97 Gros Ventre Summit 8750 12.9 12.8 101 12.7 13.1 97 Gunsight Pass 9820 13.2 13.8 96 13.7 14.1 97 Lewis Lake Divide 7850 28.4 30.2 94 32.6 35.6 92 Phillips Bench 8200 -M 25.8 * -M 28.3 * Salt River Summit 7640 14.7 12.3 120 16.3 16.8 97 Snake River Station 6920 17.5 14.2 123 22.7 22.6 100 Spring Creek Divide 9000 27.1 22.7 119 25.4 23.9 106 Thumb Divide 7980 18.0 14.6 123 17.6 18.8 94 Togwotee Pass 9580 28.1 22.6 124 27.6 24.5 113 Two Ocean Plateau 9240 33.1 26.6 124 26.9 27.4 98 Willow Creek 8080 39.0 27.8 140 36.4 33.9 107 Younts Peak 8350 18.1 14.5 125 15.0 15.9 94 ----- ----- Basin Index (%) 116 97 MADISON-GALLATIN Black Bear 8170 -M 36.7 * 33.6 38.4 88 Canyon 7870 15.3 12.3 124 15.8 16.3 97 Madison Plateau 7750 23.0 22.0 105 20.4 26.4 77 West Yellowstone 6700 -M 8.8 * -M 14.2 * Whiskey Creek 6800 16.4 14.7 112 18.3 20.3 90 ----- ----- Basin Index (%) 112 87 YELLOWSTONE Beartooth Lake 9360 24.3 21.7 112 22.7 19.9 114 Burnt Mtn 5880 7.9 3.0 263 14.7 13.2 111 Canyon 7870 15.3 12.3 124 15.8 16.3 97 Cole Creek 7850 17.6 15.2 116 13.6 13.3 102 Evening Star 9200 28.5 24.1 118 30.9 27.6 112 Fisher Creek 9100 33.9 31.5 108 34.8 31.8 109 Northeast Entrance 7350 10.4 8.6 121 13.1 12.3 107 Parker Peak 9400 27.4 20.0 137 24.9 17.8 140 Sylvan Lake 8420 22.7 19.7 115 24.7 22.5 110 Thumb Divide 7980 18.0 14.6 123 17.6 18.8 94 Two Ocean Plateau 9240 33.1 26.6 124 26.9 27.4 98 White Mill 8700 27.6 22.9 121 23.1 23.9 97 Wolverine 7650 12.4 9.4 132 13.6 12.3 111 Younts Peak 8350 18.1 14.5 125 15.0 15.9 94 ----- ----- Basin Index (%) 122 107 WIND RIVER Burroughs Creek 8750 13.7 -M * 14.3 -M * Castle Creek 8400 5.1 -M * 7.0 -M * Cold Springs 9630 7.2 6.3 114 7.5 10.2 74 Deer Park 9700 14.0 16.1 87 13.7 20.4 67 Hobbs Park 10100 13.9 14.6 95 12.4 13.8 90 Kirwin 9550 -M 9.7 * 11.2 11.7 96 Little Warm 9370 12.3 10.2 121 10.6 13.0 82 Owl Creek 8975 5.8 5.7 102 7.2 6.2 116 South Pass 9040 12.0 15.6 77 11.4 17.7 64 St. Lawrence Alt 8620 4.8 6.9 70 7.5 9.2 82 Togwotee Pass 9580 28.1 22.6 124 27.6 24.5 113 Townsend Creek 8700 9.2 9.9 93 10.0 12.4 81 ----- ----- Basin Index (%) 99 86 BIGHORN BASIN Bald Mtn. 9380 20.7 19.3 107 16.5 17.3 95 Bear Trap Meadow 8200 7.9 4.7 168 9.6 8.8 109 Bone Springs Div 9350 16.8 17.0 99 14.8 15.8 94 Grave Springs 8550 9.7 9.5 102 10.2 11.0 93 Kirwin 9550 -M 9.7 * 11.2 11.7 96 Marquette 8760 7.3 -M * 9.1 -M * Middle Powder 7760 12.0 12.3 98 11.8 12.0 98 Owl Creek 8975 5.8 5.7 102 7.2 6.2 116 Powder River Pass 9480 12.0 10.3 117 12.6 12.9 98 Shell Creek 9580 15.0 15.5 97 14.2 14.0 101 Timber Creek 7950 5.5 5.1 108 7.1 7.6 93 ----- ----- Basin Index (%) 106 98 SHOSHONE RIVER Blackwater 9780 24.0 23.1 104 24.3 20.8 117 Evening Star 9200 28.5 24.1 118 30.9 27.6 112 Marquette 8760 7.3 -M * 9.1 -M * Sylvan Lake 8420 22.7 19.7 115 24.7 22.5 110 Sylvan Road 7120 11.4 10.4 110 -M 16.8 * Younts Peak 8350 18.1 14.5 125 15.0 15.9 94 ----- ----- Basin Index (%) 114 109 POWDER RIVER Bear Trap Meadow 8200 7.9 4.7 168 9.6 8.8 109 Cloud Peak Reservoir 9860 14.2 15.2 93 13.8 13.7 101 Grave Springs 8550 9.7 9.5 102 10.2 11.0 93 Hansen Sawmill 8360 7.1 6.1 116 8.9 8.8 101 Middle Powder 7760 12.0 12.3 98 11.8 12.0 98 Powder River Pass 9480 12.0 10.3 117 12.6 12.9 98 Soldier Park 8720 6.7 -M * 9.0 -M * ----- ----- Basin Index (%) 108 100 TONGUE RIVER Big Goose 7990 8.8 9.9 89 9.7 11.9 82 Bone Springs Div 9350 16.8 17.0 99 14.8 15.8 94 Burgess Junction 7880 11.3 12.2 93 12.6 12.7 99 Dome Lake 8880 13.2 11.9 111 9.8 14.0 70 Little Goose 8870 10.6 -M * 8.4 -M * Sucker Creek 8880 12.9 12.5 103 13.0 14.8 88 Tie Creek 6870 7.4 5.3 140 12.8 12.1 106 ----- ----- Basin Index (%) 102 89 BELLE FOURCHE Blind Park 6890 3.5 6.4 55 8.3 12.2 68 Cole Canyon 5910 -M 4.3 * -M 9.7 * ----- ----- Basin Index (%) 55 68 CHEYENNE RIVER BASIN Blind Park 6890 3.5 6.4 55 8.3 12.2 68 North Rapid Creek 6130 5.4 6.2 87 8.4 10.2 82 ----- ----- Basin Index (%) 71 75 UPPER N. PLATTE Arapaho Ridge 10960 23.1 21.3 108 22.1 23.2 95 Blackhall Mtn 9820 30.1 -M * 29.1 -M * Columbine 9160 27.4 23.0 119 28.3 25.9 109 Divide Peak 8880 20.7 20.3 102 21.9 21.8 100 Joe Wright 10120 21.1 21.8 97 26.6 26.2 102 Laprele Creek 8375 11.7 9.4 124 13.2 12.8 103 Med Bow 10500 42.9 -M * 35.3 -M * Never Summer 10280 -M 20.5 * -M -M * North French Creek 10130 33.4 30.7 109 32.0 27.2 118 Old Battle 10000 32.1 31.9 101 30.4 35.5 86 Rawah 9020 9.9 10.4 95 14.4 14.8 97 Sage Creek Basin 7850 12.3 10.8 114 12.5 14.9 84 Sand Lake 10050 29.8 29.8 100 27.2 25.2 108 South Brush Creek 8440 10.2 11.6 88 13.2 15.6 85 Tower 10500 45.7 46.9 97 41.8 40.3 104 Webber Springs 9250 22.3 23.3 96 25.3 27.1 93 Whiskey Park 8950 32.1 27.6 116 31.5 28.3 111 Willow Creek Pass 9540 13.7 12.5 110 12.9 13.7 94 Zirkel 9340 25.8 25.5 101 -M 29.0 * ----- ----- Basin Index (%) 104 100 SWEETWATER Deer Park 9700 14.0 16.1 87 13.7 20.4 67 Larsen Creek 9000 6.3 11.2 56 9.3 -M * South Pass 9040 12.0 15.6 77 11.4 17.7 64 ----- ----- Basin Index (%) 75 66 LOWER N. PLATTE Casper Mtn. 7900 15.7 14.5 108 11.9 15.4 77 Laprele Creek 8375 11.7 9.4 124 13.2 12.8 103 Reno Hill 8400 16.5 14.2 116 17.5 15.9 110 Windy Peak 7900 9.2 7.6 121 9.3 10.8 86 ----- ----- Basin Index (%) 116 95 LARAMIE RIVER Brooklyn Lake 10240 27.6 22.3 124 26.4 21.5 123 Cinnabar Park 9574 22.6 21.4 106 25.3 24.6 103 Crow Creek 8330 6.3 6.3 100 10.7 11.3 95 Deadman Hill 10220 18.7 16.5 113 16.5 17.7 93 Rawah 9020 9.9 10.4 95 14.4 14.8 97 Roach 9700 14.2 16.6 86 16.2 19.6 83 Windy Peak 7900 9.2 7.6 121 9.3 10.8 86 ----- ----- Basin Index (%) 107 99 S. PLATTE Black Mountain 8920 9.2 -M * 13.2 -M * Crow Creek 8330 6.3 6.3 100 10.7 11.3 95 Deadman Hill 10220 18.7 16.5 113 16.5 17.7 93 ----- ----- Basin Index (%) 110 94 LITTLE SNAKE RIVER Battle Mountain 7440 8.6 8.4 102 14.6 15.2 96 Divide Peak 8880 20.7 20.3 102 21.9 21.8 100 Elk River 8700 18.2 18.4 99 18.1 20.4 89 Little Snake River 8915 26.4 26.0 102 32.5 30.5 107 Old Battle 10000 32.1 31.9 101 30.4 35.5 86 Sage Creek Basin 7850 12.3 10.8 114 12.5 14.9 84 Sandstone RS 8150 13.5 12.6 107 16.2 18.6 87 Whiskey Park 8950 32.1 27.6 116 31.5 28.3 111 ----- ----- Basin Index (%) 105 96 UPPER GREEN RIVER Big Sandy Opening 9080 9.9 12.9 77 9.1 13.5 67 Blind Bull Sum 8650 26.5 23.5 113 16.2 19.6 83 East Rim Divide 7930 11.0 10.2 108 10.1 11.8 86 Elkhart Park G.S. 9400 10.6 12.3 86 10.7 13.5 79 Gros Ventre Summit 8750 12.9 12.8 101 12.7 13.1 97 Gunsight Pass 9820 13.2 13.8 96 13.7 14.1 97 Indian Creek 9425 23.6 24.8 95 16.8 22.7 74 Kendall R.S. 7740 10.1 10.9 93 11.3 14.3 79 Loomis Park 8240 14.6 13.7 107 18.6 17.4 107 New Fork Lake 8340 10.1 10.1 100 -M 10.9 * Pocket Creek 9360 -M -M * 8.5 -M * Snider Basin 8060 12.5 12.2 102 14.3 14.3 100 Spring Creek Divide 9000 27.1 22.7 119 25.4 23.9 106 Triple Peak 8500 27.9 21.0 133 26.9 25.5 105 ----- ----- Basin Index (%) 105 91 LOWER GREEN RIVER Blacks Fork Jct 8869 7.5 -M * 12.0 -M * Buck Pasture 9632 -M -M * -M -M * EF Blacks Fork GS 9360 13.3 -M * 12.0 -M * Hams Fork 7840 10.6 9.7 109 11.8 11.5 103 Hewinta 9500 10.7 10.6 101 14.7 14.4 102 Hickerson Park 9122 10.2 7.7 132 11.8 10.5 112 Hole-in-Rock 9168 9.8 7.1 138 11.6 10.0 116 Indian Creek 9425 23.6 24.8 95 16.8 22.7 74 Kelley R.S. 8180 15.2 14.3 106 16.7 18.2 92 Spirit Lk 10235 17.2 -M * 18.6 -M * Steel Creek Park 10158 17.5 16.0 109 18.0 16.9 107 ----- ----- Basin Index (%) 108 97 UPPER BEAR RIVER Bear River RS 8777 8.4 -M * 11.7 -M * Bug Lake 7987 18.7 19.0 98 18.8 19.6 96 Burts Miller Ranch 8000 3.0 -M * 7.2 -M * Chalk Creek #1 9171 20.2 24.7 82 19.4 25.6 76 Hayden Fork 9130 14.5 14.9 97 20.6 21.4 96 Kelley R.S. 8180 15.2 14.3 106 16.7 18.2 92 Lily Lake 9133 11.5 12.7 91 13.1 17.5 75 Monte Cristo 8932 28.9 27.9 104 26.6 26.3 101 Salt River Summit 7640 14.7 12.3 120 16.3 16.8 97 Spring Creek Divide 9000 27.1 22.7 119 25.4 23.9 106 ----- ----- Basin Index (%) 102 93 ----------------------------------------------------------------------------- -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.