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 MONDAY: APRIL 6 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 17.9 15.2 118 18.7 20.5 91 Black Bear 8170 35.1 37.2 94 32.4 37.6 86 Blind Bull Sum 8650 26.2 23.1 113 15.9 19.2 83 Cottonwood Creek 7670 27.1 21.0 129 29.3 24.3 121 East Rim Divide 7930 12.2 10.2 120 10.0 11.6 86 Grand Targhee 9260 42.7 38.2 112 28.8 30.4 95 Granite Creek 6770 17.6 14.6 121 16.5 19.4 85 Grassy Lake 7265 34.0 31.5 108 33.9 35.3 96 Gros Ventre Summit 8750 12.6 12.9 98 12.3 12.7 97 Gunsight Pass 9820 13.7 13.7 100 13.5 13.6 99 Lewis Lake Divide 7850 27.5 29.8 92 31.3 34.8 90 Phillips Bench 8200 30.3 25.2 120 29.3 27.7 106 Salt River Summit 7640 16.1 12.9 125 16.2 16.4 99 Snake River Station 6920 18.4 14.9 123 21.8 22.1 99 Spring Creek Divide 9000 26.8 22.5 119 25.1 23.5 107 Thumb Divide 7980 17.5 14.7 119 16.7 18.3 91 Togwotee Pass 9580 27.7 22.0 126 26.6 23.9 111 Two Ocean Plateau 9240 31.7 25.9 122 24.4 26.6 92 Willow Creek 8080 38.1 28.4 134 35.8 33.0 108 Younts Peak 8350 18.3 14.3 128 14.5 15.5 94 ----- ----- Basin Index (%) 115 97 MADISON-GALLATIN Black Bear 8170 35.1 37.2 94 32.4 37.6 86 Canyon 7870 15.2 12.5 122 15.4 16.0 96 Madison Plateau 7750 22.6 21.4 106 19.8 25.9 76 West Yellowstone 6700 11.7 9.7 121 9.3 14.0 66 Whiskey Creek 6800 15.8 14.9 106 17.8 19.8 90 ----- ----- Basin Index (%) 105 84 YELLOWSTONE Beartooth Lake 9360 23.6 21.2 111 22.1 19.4 114 Burnt Mtn 5880 8.7 4.6 189 14.7 12.8 115 Canyon 7870 15.2 12.5 122 15.4 16.0 96 Cole Creek 7850 17.6 14.4 122 13.6 12.7 107 Evening Star 9200 28.0 23.7 118 30.1 26.8 112 Fisher Creek 9100 33.0 31.1 106 33.7 31.1 108 Northeast Entrance 7350 11.0 9.1 121 12.7 12.0 106 Parker Peak 9400 -M 19.3 * -M 17.3 * Sylvan Lake 8420 22.1 19.3 115 23.8 21.8 109 Thumb Divide 7980 17.5 14.7 119 16.7 18.3 91 Two Ocean Plateau 9240 31.7 25.9 122 24.4 26.6 92 White Mill 8700 26.6 22.1 120 22.2 23.2 96 Wolverine 7650 13.1 9.5 138 13.2 12.0 110 Younts Peak 8350 18.3 14.3 128 14.5 15.5 94 ----- ----- Basin Index (%) 120 104 WIND RIVER Burroughs Creek 8750 13.4 -M * 13.9 -M * Castle Creek 8400 6.1 -M * 7.0 -M * Cold Springs 9630 7.6 6.8 112 7.4 9.8 76 Deer Park 9700 14.7 15.4 95 13.2 19.6 67 Hobbs Park 10100 14.0 14.0 100 12.0 13.2 91 Kirwin 9550 12.1 9.6 126 10.7 11.4 94 Little Warm 9370 12.9 10.2 126 10.3 12.6 82 Owl Creek 8975 6.7 5.8 116 7.2 5.9 122 South Pass 9040 12.6 15.1 83 11.1 17.1 65 St. Lawrence Alt 8620 5.6 6.8 82 7.4 8.9 83 Togwotee Pass 9580 27.7 22.0 126 26.6 23.9 111 Townsend Creek 8700 9.8 9.5 103 9.9 11.9 83 ----- ----- Basin Index (%) 107 86 BIGHORN BASIN Bald Mtn. 9380 20.3 19.0 107 16.3 16.7 98 Bear Trap Meadow 8200 9.0 5.0 180 9.6 8.4 114 Bone Springs Div 9350 17.2 16.7 103 14.4 15.3 94 Grave Springs 8550 10.0 9.3 108 10.3 10.4 99 Kirwin 9550 12.1 9.6 126 10.7 11.4 94 Marquette 8760 7.2 -M * 8.8 -M * Middle Powder 7760 12.5 11.9 105 11.9 11.5 103 Owl Creek 8975 6.7 5.8 116 7.2 5.9 122 Powder River Pass 9480 12.0 10.1 119 12.4 12.4 100 Shell Creek 9580 14.9 15.0 99 13.9 13.6 102 Timber Creek 7950 5.9 4.9 120 7.1 7.2 99 ----- ----- Basin Index (%) 112 101 SHOSHONE RIVER Blackwater 9780 23.0 22.4 103 22.8 20.2 113 Evening Star 9200 28.0 23.7 118 30.1 26.8 112 Marquette 8760 7.2 -M * 8.8 -M * Sylvan Lake 8420 22.1 19.3 115 23.8 21.8 109 Sylvan Road 7120 12.7 10.8 118 -M 16.5 * Younts Peak 8350 18.3 14.3 128 14.5 15.5 94 ----- ----- Basin Index (%) 115 108 POWDER RIVER Bear Trap Meadow 8200 9.0 5.0 180 9.6 8.4 114 Cloud Peak Reservoir 9860 14.3 14.7 97 13.6 13.1 104 Grave Springs 8550 10.0 9.3 108 10.3 10.4 99 Hansen Sawmill 8360 7.6 6.2 123 8.8 8.4 105 Middle Powder 7760 12.5 11.9 105 11.9 11.5 103 Powder River Pass 9480 12.0 10.1 119 12.4 12.4 100 Soldier Park 8720 7.3 -M * 8.8 -M * ----- ----- Basin Index (%) 114 104 TONGUE RIVER Big Goose 7990 8.9 9.5 94 9.6 11.2 86 Bone Springs Div 9350 17.2 16.7 103 14.4 15.3 94 Burgess Junction 7880 11.4 11.8 97 12.5 12.2 102 Dome Lake 8880 13.4 11.7 115 9.7 13.4 72 Little Goose 8870 10.8 -M * 8.3 -M * Sucker Creek 8880 13.2 12.0 110 12.9 14.2 91 Tie Creek 6870 8.4 5.5 153 12.7 11.5 110 ----- ----- Basin Index (%) 108 92 BELLE FOURCHE Blind Park 6890 6.1 7.1 86 8.4 11.8 71 Cole Canyon 5910 -M 5.3 * -M 9.3 * ----- ----- Basin Index (%) 86 71 CHEYENNE RIVER BASIN Blind Park 6890 6.1 7.1 86 8.4 11.8 71 North Rapid Creek 6130 7.2 6.6 109 8.3 9.8 85 ----- ----- Basin Index (%) 97 77 UPPER N. PLATTE Arapaho Ridge 10960 23.2 20.7 112 22.1 22.2 100 Blackhall Mtn 9820 30.8 -M * 29.2 -M * Columbine 9160 30.3 23.4 129 28.4 25.2 113 Divide Peak 8880 21.4 19.8 108 21.9 21.2 103 Joe Wright 10120 22.5 21.0 107 26.6 25.5 104 Laprele Creek 8375 12.6 9.4 134 13.2 12.3 107 Med Bow 10500 43.7 -M * 35.2 -M * Never Summer 10280 -M 20.3 * -M -M * North French Creek 10130 33.6 29.2 115 32.0 26.4 121 Old Battle 10000 32.3 31.1 104 29.2 34.6 84 Rawah 9020 11.9 10.6 112 14.5 14.0 104 Sage Creek Basin 7850 15.4 12.2 126 12.5 14.3 87 Sand Lake 10050 30.1 28.6 105 27.2 24.5 111 South Brush Creek 8440 12.6 12.0 105 13.1 15.0 87 Tower 10500 46.1 45.6 101 41.0 39.4 104 Webber Springs 9250 22.9 23.1 99 25.3 26.4 96 Whiskey Park 8950 33.2 27.2 122 31.5 27.6 114 Willow Creek Pass 9540 13.7 12.1 113 12.9 13.3 97 Zirkel 9340 29.1 26.3 111 30.9 28.1 110 ----- ----- Basin Index (%) 111 103 SWEETWATER Deer Park 9700 14.7 15.4 95 13.2 19.6 67 Larsen Creek 9000 7.4 11.7 63 9.2 -M * South Pass 9040 12.6 15.1 83 11.1 17.1 65 ----- ----- Basin Index (%) 82 66 LOWER N. PLATTE Casper Mtn. 7900 16.6 14.3 116 11.9 14.7 81 Laprele Creek 8375 12.6 9.4 134 13.2 12.3 107 Reno Hill 8400 17.3 14.0 124 17.5 15.2 115 Windy Peak 7900 10.1 7.8 129 9.1 10.4 88 ----- ----- Basin Index (%) 124 98 LARAMIE RIVER Brooklyn Lake 10240 27.8 21.5 129 26.4 20.9 126 Cinnabar Park 9574 22.7 21.0 108 25.4 24.0 106 Crow Creek 8330 7.7 7.0 110 10.8 10.7 101 Deadman Hill 10220 18.8 16.0 118 16.5 17.1 96 Rawah 9020 11.9 10.6 112 14.5 14.0 104 Roach 9700 15.3 16.4 93 15.9 19.0 84 Windy Peak 7900 10.1 7.8 129 9.1 10.4 88 ----- ----- Basin Index (%) 114 102 S. PLATTE Black Mountain 8920 10.5 -M * 13.1 -M * Crow Creek 8330 7.7 7.0 110 10.8 10.7 101 Deadman Hill 10220 18.8 16.0 118 16.5 17.1 96 ----- ----- Basin Index (%) 115 98 LITTLE SNAKE RIVER Battle Mountain 7440 11.9 9.8 121 14.6 14.8 99 Divide Peak 8880 21.4 19.8 108 21.9 21.2 103 Elk River 8700 20.7 19.2 108 18.0 19.8 91 Little Snake River 8915 28.4 24.9 114 32.7 29.2 112 Old Battle 10000 32.3 31.1 104 29.2 34.6 84 Sage Creek Basin 7850 15.4 12.2 126 12.5 14.3 87 Sandstone RS 8150 17.0 12.8 133 16.3 18.1 90 Whiskey Park 8950 33.2 27.2 122 31.5 27.6 114 ----- ----- Basin Index (%) 115 98 UPPER GREEN RIVER Big Sandy Opening 9080 10.4 12.5 83 9.2 13.0 71 Blind Bull Sum 8650 26.2 23.1 113 15.9 19.2 83 East Rim Divide 7930 12.2 10.2 120 10.0 11.6 86 Elkhart Park G.S. 9400 10.7 12.2 88 10.5 13.1 80 Gros Ventre Summit 8750 12.6 12.9 98 12.3 12.7 97 Gunsight Pass 9820 13.7 13.7 100 13.5 13.6 99 Indian Creek 9425 23.9 24.6 97 16.8 22.3 75 Kendall R.S. 7740 11.2 11.5 97 11.3 14.0 81 Loomis Park 8240 15.0 13.8 109 18.2 17.0 107 New Fork Lake 8340 10.6 10.3 103 9.2 10.6 87 Pocket Creek 9360 -M -M * 8.5 -M * Snider Basin 8060 13.2 12.3 107 14.2 14.0 101 Spring Creek Divide 9000 26.8 22.5 119 25.1 23.5 107 Triple Peak 8500 27.4 21.9 125 26.8 25.0 107 ----- ----- Basin Index (%) 106 92 LOWER GREEN RIVER Blacks Fork Jct 8869 8.5 -M * 12.1 -M * Buck Pasture 9632 18.2 -M * 17.4 -M * EF Blacks Fork GS 9360 14.8 -M * 12.0 -M * Hams Fork 7840 12.8 10.7 120 11.8 11.2 105 Hewinta 9500 12.6 10.9 116 14.9 13.9 107 Hickerson Park 9122 11.0 7.9 139 11.8 10.1 117 Hole-in-Rock 9168 11.4 7.0 163 11.6 9.7 120 Indian Creek 9425 23.9 24.6 97 16.8 22.3 75 Kelley R.S. 8180 16.2 14.8 109 16.7 17.8 94 Spirit Lk 10235 18.3 -M * 18.6 -M * Steel Creek Park 10158 17.5 15.7 111 18.0 16.3 110 ----- ----- Basin Index (%) 115 100 UPPER BEAR RIVER Bear River RS 8777 10.5 -M * 11.7 -M * Bug Lake 7987 20.0 18.3 109 18.8 19.2 98 Burts Miller Ranch 8000 6.2 -M * 7.3 -M * Chalk Creek #1 9171 21.1 24.3 87 19.4 24.9 78 Hayden Fork 9130 17.1 15.4 111 20.6 20.9 99 Kelley R.S. 8180 16.2 14.8 109 16.7 17.8 94 Lily Lake 9133 12.4 12.6 98 13.1 17.0 77 Monte Cristo 8932 30.0 27.6 109 26.3 25.6 103 Salt River Summit 7640 16.1 12.9 125 16.2 16.4 99 Spring Creek Divide 9000 26.8 22.5 119 25.1 23.5 107 ----- ----- Basin Index (%) 108 94 ----------------------------------------------------------------------------- -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.