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 FRIDAY: APRIL 3 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 17.4 15.0 116 18.0 20.4 88 Black Bear 8170 34.8 36.8 95 32.0 37.0 86 Blind Bull Sum 8650 25.9 22.8 114 15.6 19.0 82 Cottonwood Creek 7670 27.2 21.3 128 28.9 24.0 120 East Rim Divide 7930 11.8 10.1 117 9.4 11.4 82 Grand Targhee 9260 41.7 37.2 112 28.4 30.0 95 Granite Creek 6770 17.2 14.8 116 -M 19.2 * Grassy Lake 7265 33.5 31.6 106 33.3 35.0 95 Gros Ventre Summit 8750 12.3 13.0 95 11.8 12.5 94 Gunsight Pass 9820 13.2 13.5 98 13.0 13.4 97 Lewis Lake Divide 7850 26.6 29.6 90 30.4 34.5 88 Phillips Bench 8200 29.5 24.6 120 28.3 27.4 103 Salt River Summit 7640 15.8 13.0 122 15.8 16.2 98 Snake River Station 6920 18.0 15.2 118 21.1 21.8 97 Spring Creek Divide 9000 26.5 22.5 118 24.6 23.2 106 Thumb Divide 7980 16.9 14.8 114 16.3 18.0 91 Togwotee Pass 9580 27.2 21.7 125 26.5 23.6 112 Two Ocean Plateau 9240 30.8 25.7 120 24.2 26.4 92 Willow Creek 8080 37.7 28.1 134 35.2 32.7 108 Younts Peak 8350 17.4 14.2 123 13.4 15.3 88 ----- ----- Basin Index (%) 113 96 MADISON-GALLATIN Black Bear 8170 34.8 36.8 95 32.0 37.0 86 Canyon 7870 14.9 12.4 120 15.1 15.7 96 Madison Plateau 7750 22.2 21.4 104 19.6 25.5 77 West Yellowstone 6700 11.8 10.2 116 9.3 13.8 67 Whiskey Creek 6800 15.6 15.0 104 17.5 19.5 90 ----- ----- Basin Index (%) 104 84 YELLOWSTONE Beartooth Lake 9360 23.2 21.2 109 21.5 19.1 113 Burnt Mtn 5880 8.9 4.5 198 13.9 12.4 112 Canyon 7870 14.9 12.4 120 15.1 15.7 96 Cole Creek 7850 17.2 13.9 124 13.4 12.2 110 Evening Star 9200 27.5 23.8 116 29.2 26.4 111 Fisher Creek 9100 32.4 30.6 106 33.0 30.7 107 Northeast Entrance 7350 11.1 9.4 118 12.6 11.8 107 Parker Peak 9400 -M 18.9 * -M 17.0 * Sylvan Lake 8420 22.0 19.2 115 23.5 21.6 109 Thumb Divide 7980 16.9 14.8 114 16.3 18.0 91 Two Ocean Plateau 9240 30.8 25.7 120 24.2 26.4 92 White Mill 8700 26.2 21.8 120 21.8 22.9 95 Wolverine 7650 12.9 9.3 139 12.9 11.8 109 Younts Peak 8350 17.4 14.2 123 13.4 15.3 88 ----- ----- Basin Index (%) 118 103 WIND RIVER Burroughs Creek 8750 12.9 -M * 13.7 -M * Castle Creek 8400 6.0 -M * 6.7 -M * Cold Springs 9630 7.5 7.1 106 6.6 9.7 68 Deer Park 9700 14.0 14.9 94 12.5 19.1 65 Hobbs Park 10100 13.4 13.6 99 11.3 12.8 88 Kirwin 9550 11.6 9.5 122 10.1 11.2 90 Little Warm 9370 12.3 10.2 121 9.2 12.4 74 Owl Creek 8975 6.6 5.7 116 7.0 5.8 121 South Pass 9040 12.1 15.0 81 10.6 16.9 63 St. Lawrence Alt 8620 5.2 6.8 76 7.2 8.7 83 Togwotee Pass 9580 27.2 21.7 125 26.5 23.6 112 Townsend Creek 8700 9.4 9.2 102 9.4 11.5 82 ----- ----- Basin Index (%) 105 84 BIGHORN BASIN Bald Mtn. 9380 20.0 18.9 106 14.8 16.5 90 Bear Trap Meadow 8200 8.7 5.1 171 9.0 8.2 110 Bone Springs Div 9350 17.3 16.3 106 13.9 15.0 93 Grave Springs 8550 9.8 9.0 109 10.3 10.1 102 Kirwin 9550 11.6 9.5 122 10.1 11.2 90 Marquette 8760 7.0 -M * 8.6 -M * Middle Powder 7760 12.4 11.6 107 11.6 11.3 103 Owl Creek 8975 6.6 5.7 116 7.0 5.8 121 Powder River Pass 9480 12.2 10.0 122 12.0 12.1 99 Shell Creek 9580 14.5 14.7 99 13.7 13.3 103 Timber Creek 7950 6.1 4.8 127 7.0 7.1 99 ----- ----- Basin Index (%) 113 99 SHOSHONE RIVER Blackwater 9780 22.3 22.3 100 22.3 19.9 112 Evening Star 9200 27.5 23.8 116 29.2 26.4 111 Marquette 8760 7.0 -M * 8.6 -M * Sylvan Lake 8420 22.0 19.2 115 23.5 21.6 109 Sylvan Road 7120 12.6 11.0 115 -M 16.3 * Younts Peak 8350 17.4 14.2 123 13.4 15.3 88 ----- ----- Basin Index (%) 112 106 POWDER RIVER Bear Trap Meadow 8200 8.7 5.1 171 9.0 8.2 110 Cloud Peak Reservoir 9860 14.0 14.3 98 12.9 12.8 101 Grave Springs 8550 9.8 9.0 109 10.3 10.1 102 Hansen Sawmill 8360 7.4 6.3 117 8.5 8.2 104 Middle Powder 7760 12.4 11.6 107 11.6 11.3 103 Powder River Pass 9480 12.2 10.0 122 12.0 12.1 99 Soldier Park 8720 6.8 -M * 8.5 -M * ----- ----- Basin Index (%) 115 103 TONGUE RIVER Big Goose 7990 8.6 9.2 93 9.9 10.9 91 Bone Springs Div 9350 17.3 16.3 106 13.9 15.0 93 Burgess Junction 7880 11.3 11.5 98 12.0 11.9 101 Dome Lake 8880 13.2 11.6 114 9.3 13.1 71 Little Goose 8870 10.6 -M * 8.1 -M * Sucker Creek 8880 13.2 11.6 114 12.3 13.9 88 Tie Creek 6870 8.2 5.5 149 12.5 11.1 113 ----- ----- Basin Index (%) 109 92 BELLE FOURCHE Blind Park 6890 6.1 7.2 85 8.0 11.4 70 Cole Canyon 5910 -M 5.7 * -M 9.0 * ----- ----- Basin Index (%) 85 70 CHEYENNE RIVER BASIN Blind Park 6890 6.1 7.2 85 8.0 11.4 70 North Rapid Creek 6130 7.3 6.7 109 8.4 9.4 89 ----- ----- Basin Index (%) 96 79 UPPER N. PLATTE Arapaho Ridge 10960 23.0 20.2 114 21.9 21.5 102 Blackhall Mtn 9820 30.7 -M * 29.1 -M * Columbine 9160 30.1 23.2 130 27.3 24.8 110 Divide Peak 8880 21.3 19.6 109 21.6 20.8 104 Joe Wright 10120 -M 20.5 * -M 25.0 * Laprele Creek 8375 12.8 9.4 136 12.9 12.1 107 Med Bow 10500 43.8 -M * 35.0 -M * Never Summer 10280 20.2 19.9 102 15.2 -M * North French Creek 10130 33.4 28.5 117 32.0 26.0 123 Old Battle 10000 32.2 30.3 106 29.1 34.1 85 Rawah 9020 11.9 10.4 114 14.3 13.7 104 Sage Creek Basin 7850 15.3 12.6 121 12.4 14.1 88 Sand Lake 10050 29.8 28.1 106 26.9 24.0 112 South Brush Creek 8440 12.8 12.2 105 13.0 14.8 88 Tower 10500 46.0 44.8 103 40.7 38.6 105 Webber Springs 9250 23.1 23.0 100 25.0 26.0 96 Whiskey Park 8950 32.8 26.5 124 31.4 27.2 115 Willow Creek Pass 9540 13.6 11.9 114 12.8 13.0 98 Zirkel 9340 28.8 26.3 110 30.7 27.6 111 ----- ----- Basin Index (%) 112 104 SWEETWATER Deer Park 9700 14.0 14.9 94 12.5 19.1 65 Larsen Creek 9000 6.8 12.0 57 8.7 -M * South Pass 9040 12.1 15.0 81 10.6 16.9 63 ----- ----- Basin Index (%) 79 64 LOWER N. PLATTE Casper Mtn. 7900 16.7 13.8 121 11.8 14.3 83 Laprele Creek 8375 12.8 9.4 136 12.9 12.1 107 Reno Hill 8400 17.0 13.6 125 16.8 14.8 114 Windy Peak 7900 10.0 7.8 128 8.5 10.2 83 ----- ----- Basin Index (%) 127 97 LARAMIE RIVER Brooklyn Lake 10240 27.6 20.7 133 26.2 20.4 128 Cinnabar Park 9574 22.9 20.4 112 25.4 23.3 109 Crow Creek 8330 7.5 7.0 107 10.5 10.4 101 Deadman Hill 10220 18.6 15.8 118 16.4 16.7 98 Rawah 9020 11.9 10.4 114 14.3 13.7 104 Roach 9700 15.3 16.0 96 15.7 18.6 84 Windy Peak 7900 10.0 7.8 128 8.5 10.2 83 ----- ----- Basin Index (%) 116 103 S. PLATTE Black Mountain 8920 10.1 -M * 13.0 -M * Crow Creek 8330 7.5 7.0 107 10.5 10.4 101 Deadman Hill 10220 18.6 15.8 118 16.4 16.7 98 ----- ----- Basin Index (%) 114 99 LITTLE SNAKE RIVER Battle Mountain 7440 12.0 10.4 115 13.9 14.6 95 Divide Peak 8880 21.3 19.6 109 21.6 20.8 104 Elk River 8700 20.5 18.9 108 17.8 19.5 91 Little Snake River 8915 28.3 23.8 119 32.6 28.9 113 Old Battle 10000 32.2 30.3 106 29.1 34.1 85 Sage Creek Basin 7850 15.3 12.6 121 12.4 14.1 88 Sandstone RS 8150 17.1 13.0 132 16.0 17.9 89 Whiskey Park 8950 32.8 26.5 124 31.4 27.2 115 ----- ----- Basin Index (%) 116 99 UPPER GREEN RIVER Big Sandy Opening 9080 9.9 12.4 80 8.6 12.8 67 Blind Bull Sum 8650 25.9 22.8 114 15.6 19.0 82 East Rim Divide 7930 11.8 10.1 117 9.4 11.4 82 Elkhart Park G.S. 9400 10.3 12.2 84 10.1 12.9 78 Gros Ventre Summit 8750 12.3 13.0 95 11.8 12.5 94 Gunsight Pass 9820 13.2 13.5 98 13.0 13.4 97 Indian Creek 9425 23.4 24.2 97 16.4 22.0 75 Kendall R.S. 7740 10.9 11.5 95 10.7 13.8 78 Loomis Park 8240 14.8 14.1 105 17.8 16.8 106 New Fork Lake 8340 10.8 10.3 105 -M 10.5 * Pocket Creek 9360 -M -M * 8.3 -M * Snider Basin 8060 13.0 12.3 106 13.7 13.9 99 Spring Creek Divide 9000 26.5 22.5 118 24.6 23.2 106 Triple Peak 8500 27.0 21.9 123 26.2 24.7 106 ----- ----- Basin Index (%) 104 91 LOWER GREEN RIVER Blacks Fork Jct 8869 8.4 -M * 12.1 -M * Buck Pasture 9632 18.2 -M * 17.2 -M * EF Blacks Fork GS 9360 14.5 -M * 11.5 -M * Hams Fork 7840 12.6 10.9 116 11.5 11.1 104 Hewinta 9500 12.0 10.9 110 14.4 13.6 106 Hickerson Park 9122 10.9 7.7 142 11.8 9.9 119 Hole-in-Rock 9168 11.7 7.0 167 11.2 9.4 119 Indian Creek 9425 23.4 24.2 97 16.4 22.0 75 Kelley R.S. 8180 15.6 15.0 104 16.3 17.6 93 Spirit Lk 10235 17.9 -M * 18.2 -M * Steel Creek Park 10158 17.5 15.5 113 18.0 16.0 112 ----- ----- Basin Index (%) 114 100 UPPER BEAR RIVER Bear River RS 8777 10.4 -M * 11.6 -M * Bug Lake 7987 19.8 18.2 109 18.6 18.9 98 Burts Miller Ranch 8000 6.3 -M * 7.1 -M * Chalk Creek #1 9171 20.9 23.8 88 19.2 24.5 78 Hayden Fork 9130 17.5 15.3 114 20.3 20.5 99 Kelley R.S. 8180 15.6 15.0 104 16.3 17.6 93 Lily Lake 9133 12.6 12.3 102 13.1 16.6 79 Monte Cristo 8932 29.9 26.9 111 26.3 25.3 104 Salt River Summit 7640 15.8 13.0 122 15.8 16.2 98 Spring Creek Divide 9000 26.5 22.5 118 24.6 23.2 106 ----- ----- 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.