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 WEDNESDAY: APRIL 1 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 17.1 14.8 116 17.7 20.2 88 Black Bear 8170 34.5 36.3 95 31.8 36.6 87 Blind Bull Sum 8650 25.4 22.4 113 15.4 18.8 82 Cottonwood Creek 7670 26.3 21.2 124 28.5 23.7 120 East Rim Divide 7930 11.8 10.0 118 9.6 11.3 85 Grand Targhee 9260 40.9 36.5 112 28.3 29.4 96 Granite Creek 6770 17.4 14.9 117 16.3 19.1 85 Grassy Lake 7265 32.4 31.6 103 32.2 34.6 93 Gros Ventre Summit 8750 12.3 12.9 95 12.0 12.4 97 Gunsight Pass 9820 13.0 13.4 97 12.9 13.2 98 Lewis Lake Divide 7850 26.2 29.5 89 30.1 34.1 88 Phillips Bench 8200 29.5 24.2 122 28.2 27.1 104 Salt River Summit 7640 15.5 12.9 120 15.6 16.0 98 Snake River Station 6920 17.6 15.5 114 20.6 21.6 95 Spring Creek Divide 9000 26.2 22.5 116 24.4 22.9 107 Thumb Divide 7980 16.7 14.9 112 16.0 17.8 90 Togwotee Pass 9580 26.7 21.6 124 25.6 23.3 110 Two Ocean Plateau 9240 30.4 25.6 119 24.2 26.2 92 Willow Creek 8080 36.8 27.8 132 34.6 32.2 107 Younts Peak 8350 17.6 14.1 125 13.6 15.2 89 ----- ----- Basin Index (%) 112 96 MADISON-GALLATIN Black Bear 8170 34.5 36.3 95 31.8 36.6 87 Canyon 7870 15.0 12.3 122 15.2 15.5 98 Madison Plateau 7750 22.0 21.3 103 19.4 25.2 77 West Yellowstone 6700 11.6 10.2 114 9.2 13.5 68 Whiskey Creek 6800 15.4 15.0 103 17.4 19.4 90 ----- ----- Basin Index (%) 104 84 YELLOWSTONE Beartooth Lake 9360 22.9 21.0 109 21.1 18.9 112 Burnt Mtn 5880 8.4 4.4 191 14.0 12.1 116 Canyon 7870 15.0 12.3 122 15.2 15.5 98 Cole Creek 7850 17.1 13.5 127 13.2 12.0 110 Evening Star 9200 27.1 23.9 113 28.9 26.1 111 Fisher Creek 9100 32.1 30.1 107 32.8 30.4 108 Northeast Entrance 7350 11.0 9.6 115 12.4 11.7 106 Parker Peak 9400 25.3 18.8 135 23.0 16.9 136 Sylvan Lake 8420 21.5 19.2 112 23.2 21.3 109 Thumb Divide 7980 16.7 14.9 112 16.0 17.8 90 Two Ocean Plateau 9240 30.4 25.6 119 24.2 26.2 92 White Mill 8700 25.8 21.6 119 21.4 22.7 94 Wolverine 7650 12.7 9.1 140 12.8 11.7 109 Younts Peak 8350 17.6 14.1 125 13.6 15.2 89 ----- ----- Basin Index (%) 119 105 WIND RIVER Burroughs Creek 8750 12.5 -M * 13.8 -M * Castle Creek 8400 5.1 -M * 6.1 -M * Cold Springs 9630 7.2 7.1 101 6.6 9.5 69 Deer Park 9700 13.1 14.7 89 11.7 18.6 63 Hobbs Park 10100 13.0 13.4 97 11.0 12.5 88 Kirwin 9550 11.0 9.4 117 9.5 11.0 86 Little Warm 9370 12.0 10.2 118 9.7 12.3 79 Owl Creek 8975 5.8 5.5 105 6.4 5.7 112 South Pass 9040 11.6 14.9 78 10.0 16.6 60 St. Lawrence Alt 8620 4.9 6.8 72 6.7 8.5 79 Togwotee Pass 9580 26.7 21.6 124 25.6 23.3 110 Townsend Creek 8700 9.1 9.0 101 9.0 11.3 80 ----- ----- Basin Index (%) 102 82 BIGHORN BASIN Bald Mtn. 9380 20.0 18.6 108 15.7 16.3 96 Bear Trap Meadow 8200 8.7 5.1 171 8.9 8.1 110 Bone Springs Div 9350 16.7 15.9 105 13.9 14.8 94 Grave Springs 8550 9.7 8.9 109 10.6 10.0 106 Kirwin 9550 11.0 9.4 117 9.5 11.0 86 Marquette 8760 6.6 -M * 8.3 -M * Middle Powder 7760 12.0 11.4 105 11.4 11.1 103 Owl Creek 8975 5.8 5.5 105 6.4 5.7 112 Powder River Pass 9480 11.9 10.0 119 12.1 12.0 101 Shell Creek 9580 14.3 14.5 99 13.4 13.2 102 Timber Creek 7950 5.4 4.8 112 6.3 7.0 90 ----- ----- Basin Index (%) 111 99 SHOSHONE RIVER Blackwater 9780 21.8 22.1 99 21.5 19.7 109 Evening Star 9200 27.1 23.9 113 28.9 26.1 111 Marquette 8760 6.6 -M * 8.3 -M * Sylvan Lake 8420 21.5 19.2 112 23.2 21.3 109 Sylvan Road 7120 12.4 11.1 112 15.9 16.1 99 Younts Peak 8350 17.6 14.1 125 13.6 15.2 89 ----- ----- Basin Index (%) 111 105 POWDER RIVER Bear Trap Meadow 8200 8.7 5.1 171 8.9 8.1 110 Cloud Peak Reservoir 9860 14.0 14.1 99 13.1 12.6 104 Grave Springs 8550 9.7 8.9 109 10.6 10.0 106 Hansen Sawmill 8360 7.3 6.3 116 8.4 8.1 104 Middle Powder 7760 12.0 11.4 105 11.4 11.1 103 Powder River Pass 9480 11.9 10.0 119 12.1 12.0 101 Soldier Park 8720 6.9 -M * 8.4 -M * ----- ----- Basin Index (%) 114 104 TONGUE RIVER Big Goose 7990 8.6 8.9 97 9.3 10.6 88 Bone Springs Div 9350 16.7 15.9 105 13.9 14.8 94 Burgess Junction 7880 10.9 11.3 96 12.0 11.7 103 Dome Lake 8880 13.1 11.5 114 9.2 12.9 71 Little Goose 8870 10.4 -M * 8.2 -M * Sucker Creek 8880 13.0 11.4 114 12.5 13.6 92 Tie Creek 6870 7.9 5.4 146 12.2 10.9 112 ----- ----- Basin Index (%) 109 93 BELLE FOURCHE Blind Park 6890 6.3 7.2 88 8.1 11.3 72 Cole Canyon 5910 -M 5.8 * 11.3 8.8 128 ----- ----- Basin Index (%) 88 97 CHEYENNE RIVER BASIN Blind Park 6890 6.3 7.2 88 8.1 11.3 72 North Rapid Creek 6130 6.9 6.7 103 7.9 9.3 85 ----- ----- Basin Index (%) 95 78 UPPER N. PLATTE Arapaho Ridge 10960 22.8 19.8 115 21.9 21.3 103 Blackhall Mtn 9820 30.3 -M * 28.8 -M * Columbine 9160 31.5 22.8 138 28.3 24.5 116 Divide Peak 8880 21.1 19.5 108 21.4 20.5 104 Joe Wright 10120 -M 20.2 * -M 24.6 * Laprele Creek 8375 12.3 9.5 129 12.4 11.8 105 Med Bow 10500 43.4 -M * 35.1 -M * Never Summer 10280 19.8 19.6 101 14.8 -M * North French Creek 10130 33.4 28.0 119 31.7 25.7 123 Old Battle 10000 31.9 29.6 108 29.1 33.6 87 Rawah 9020 12.4 10.3 120 14.1 13.5 104 Sage Creek Basin 7850 16.0 12.7 126 12.1 13.9 87 Sand Lake 10050 29.6 27.5 108 26.8 23.6 114 South Brush Creek 8440 13.8 12.2 113 12.9 14.6 88 Tower 10500 45.9 44.0 104 40.8 38.1 107 Webber Springs 9250 22.9 23.0 100 24.8 25.6 97 Whiskey Park 8950 33.0 25.8 128 31.1 26.9 116 Willow Creek Pass 9540 13.4 11.8 114 12.6 12.8 98 Zirkel 9340 29.2 26.4 111 30.7 27.2 113 ----- ----- Basin Index (%) 114 105 SWEETWATER Deer Park 9700 13.1 14.7 89 11.7 18.6 63 Larsen Creek 9000 6.5 12.2 53 8.2 -M * South Pass 9040 11.6 14.9 78 10.0 16.6 60 ----- ----- Basin Index (%) 75 62 LOWER N. PLATTE Casper Mtn. 7900 15.4 13.4 115 10.7 14.0 76 Laprele Creek 8375 12.3 9.5 129 12.4 11.8 105 Reno Hill 8400 16.6 13.2 126 16.7 14.5 115 Windy Peak 7900 10.0 7.8 128 8.8 10.0 88 ----- ----- Basin Index (%) 124 97 LARAMIE RIVER Brooklyn Lake 10240 27.7 20.0 138 26.2 20.1 130 Cinnabar Park 9574 23.0 20.0 115 25.3 23.0 110 Crow Creek 8330 7.8 6.8 115 10.6 10.2 104 Deadman Hill 10220 18.5 15.6 119 16.3 16.4 99 Rawah 9020 12.4 10.3 120 14.1 13.5 104 Roach 9700 15.3 15.6 98 15.7 18.3 86 Windy Peak 7900 10.0 7.8 128 8.8 10.0 88 ----- ----- Basin Index (%) 119 105 S. PLATTE Black Mountain 8920 10.9 -M * 13.0 -M * Crow Creek 8330 7.8 6.8 115 10.6 10.2 104 Deadman Hill 10220 18.5 15.6 119 16.3 16.4 99 ----- ----- Basin Index (%) 117 101 LITTLE SNAKE RIVER Battle Mountain 7440 12.7 10.6 120 14.0 14.5 97 Divide Peak 8880 21.1 19.5 108 21.4 20.5 104 Elk River 8700 20.7 18.5 112 17.6 19.3 91 Little Snake River 8915 28.2 23.2 122 32.3 28.5 113 Old Battle 10000 31.9 29.6 108 29.1 33.6 87 Sage Creek Basin 7850 16.0 12.7 126 12.1 13.9 87 Sandstone RS 8150 17.3 13.1 132 15.9 17.7 90 Whiskey Park 8950 33.0 25.8 128 31.1 26.9 116 ----- ----- Basin Index (%) 118 99 UPPER GREEN RIVER Big Sandy Opening 9080 9.6 12.3 78 8.3 12.7 65 Blind Bull Sum 8650 25.4 22.4 113 15.4 18.8 82 East Rim Divide 7930 11.8 10.0 118 9.6 11.3 85 Elkhart Park G.S. 9400 10.5 12.1 87 10.2 12.8 80 Gros Ventre Summit 8750 12.3 12.9 95 12.0 12.4 97 Gunsight Pass 9820 13.0 13.4 97 12.9 13.2 98 Indian Creek 9425 23.3 23.9 97 16.3 21.7 75 Kendall R.S. 7740 11.0 11.4 96 11.0 13.7 80 Loomis Park 8240 14.7 14.3 103 17.7 16.7 106 New Fork Lake 8340 10.5 10.3 102 8.7 10.4 84 Pocket Creek 9360 -M -M * 7.8 -M * Snider Basin 8060 13.2 12.2 108 13.8 13.7 101 Spring Creek Divide 9000 26.2 22.5 116 24.4 22.9 107 Triple Peak 8500 26.6 21.7 123 26.0 24.4 107 ----- ----- Basin Index (%) 104 91 LOWER GREEN RIVER Blacks Fork Jct 8869 8.6 -M * 12.0 -M * Buck Pasture 9632 18.0 -M * 17.0 -M * EF Blacks Fork GS 9360 14.7 -M * 11.7 -M * Hams Fork 7840 12.8 10.8 119 11.4 10.9 105 Hewinta 9500 11.6 10.9 106 14.7 13.4 110 Hickerson Park 9122 10.7 7.5 143 11.6 9.7 120 Hole-in-Rock 9168 11.5 7.0 164 11.3 9.2 123 Indian Creek 9425 23.3 23.9 97 16.3 21.7 75 Kelley R.S. 8180 15.8 14.9 106 16.3 17.4 94 Spirit Lk 10235 17.9 -M * 18.2 -M * Steel Creek Park 10158 17.1 15.3 112 17.8 15.7 113 ----- ----- Basin Index (%) 114 101 UPPER BEAR RIVER Bear River RS 8777 10.5 -M * 11.3 -M * Bug Lake 7987 19.4 18.1 107 18.4 18.7 98 Burts Miller Ranch 8000 6.3 -M * 7.0 -M * Chalk Creek #1 9171 20.8 23.4 89 19.1 24.1 79 Hayden Fork 9130 17.2 15.1 114 20.1 20.1 100 Kelley R.S. 8180 15.8 14.9 106 16.3 17.4 94 Lily Lake 9133 12.3 12.1 102 12.7 16.3 78 Monte Cristo 8932 29.4 26.3 112 25.7 24.9 103 Salt River Summit 7640 15.5 12.9 120 15.6 16.0 98 Spring Creek Divide 9000 26.2 22.5 116 24.4 22.9 107 ----- ----- 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.