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: MARCH 31 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 16.1 14.7 110 16.8 20.1 84 Black Bear 8170 33.1 36.0 92 30.6 36.4 84 Blind Bull Sum 8650 24.1 22.2 109 14.7 18.7 79 Cottonwood Creek 7670 25.6 21.1 121 27.7 23.5 118 East Rim Divide 7930 11.3 9.9 114 9.2 11.3 81 Grand Targhee 9260 39.8 36.1 110 27.6 29.1 95 Granite Creek 6770 16.5 14.9 111 15.3 19.0 81 Grassy Lake 7265 31.6 31.5 100 31.4 34.5 91 Gros Ventre Summit 8750 11.7 12.8 91 11.5 12.3 93 Gunsight Pass 9820 12.5 13.3 94 12.5 13.1 95 Lewis Lake Divide 7850 25.1 29.4 85 29.1 34.0 86 Phillips Bench 8200 -M 24.0 * -M 27.0 * Salt River Summit 7640 14.8 12.8 116 15.1 15.9 95 Snake River Station 6920 16.8 15.6 108 19.9 21.6 92 Spring Creek Divide 9000 25.1 22.5 112 23.6 22.8 104 Thumb Divide 7980 15.9 14.9 107 15.3 17.7 86 Togwotee Pass 9580 26.0 21.6 120 25.1 23.2 108 Two Ocean Plateau 9240 28.7 25.5 113 23.1 26.1 89 Willow Creek 8080 35.2 27.6 128 33.1 32.0 103 Younts Peak 8350 16.8 14.1 119 13.4 15.1 89 ----- ----- Basin Index (%) 108 93 MADISON-GALLATIN Black Bear 8170 33.1 36.0 92 30.6 36.4 84 Canyon 7870 14.4 12.3 117 14.6 15.5 94 Madison Plateau 7750 20.8 21.2 98 18.4 25.1 73 West Yellowstone 6700 11.0 10.2 108 8.9 13.5 66 Whiskey Creek 6800 14.9 14.9 100 16.8 19.3 87 ----- ----- Basin Index (%) 100 81 YELLOWSTONE Beartooth Lake 9360 21.9 20.9 105 20.3 18.8 108 Burnt Mtn 5880 7.5 4.4 170 13.2 12.0 110 Canyon 7870 14.4 12.3 117 14.6 15.5 94 Cole Creek 7850 16.3 13.4 122 12.7 11.9 107 Evening Star 9200 26.0 23.9 109 28.0 26.0 108 Fisher Creek 9100 31.0 29.9 104 31.8 30.3 105 Northeast Entrance 7350 10.5 9.7 108 12.0 11.6 103 Parker Peak 9400 24.4 18.7 130 22.2 16.8 132 Sylvan Lake 8420 20.3 19.1 106 22.0 21.2 104 Thumb Divide 7980 15.9 14.9 107 15.3 17.7 86 Two Ocean Plateau 9240 28.7 25.5 113 23.1 26.1 89 White Mill 8700 25.0 21.5 116 20.8 22.6 92 Wolverine 7650 12.1 9.0 134 12.2 11.6 105 Younts Peak 8350 16.8 14.1 119 13.4 15.1 89 ----- ----- Basin Index (%) 114 102 WIND RIVER Burroughs Creek 8750 11.9 -M * 13.2 -M * Castle Creek 8400 5.0 -M * 5.9 -M * Cold Springs 9630 7.1 7.1 100 6.4 9.4 68 Deer Park 9700 12.7 14.6 87 11.6 18.5 63 Hobbs Park 10100 12.5 13.2 95 10.7 12.4 86 Kirwin 9550 10.6 9.4 113 9.3 11.0 85 Little Warm 9370 11.3 10.2 111 9.1 12.2 75 Owl Creek 8975 5.8 5.3 109 6.3 5.6 112 South Pass 9040 11.3 14.8 76 9.8 16.5 59 St. Lawrence Alt 8620 4.9 6.7 73 6.6 8.5 78 Togwotee Pass 9580 26.0 21.6 120 25.1 23.2 108 Townsend Creek 8700 8.6 8.9 97 8.8 11.2 79 ----- ----- Basin Index (%) 99 81 BIGHORN BASIN Bald Mtn. 9380 19.9 18.4 108 15.5 16.2 96 Bear Trap Meadow 8200 8.7 5.1 171 8.8 8.0 110 Bone Springs Div 9350 16.6 15.6 106 13.8 14.7 94 Grave Springs 8550 9.7 8.8 110 10.0 9.9 101 Kirwin 9550 10.6 9.4 113 9.3 11.0 85 Marquette 8760 6.4 -M * 8.1 -M * Middle Powder 7760 11.9 11.2 106 11.4 11.1 103 Owl Creek 8975 5.8 5.3 109 6.3 5.6 112 Powder River Pass 9480 11.9 9.9 120 12.0 11.9 101 Shell Creek 9580 14.2 14.4 99 13.4 13.1 102 Timber Creek 7950 5.3 4.7 113 6.3 6.9 91 ----- ----- Basin Index (%) 111 99 SHOSHONE RIVER Blackwater 9780 20.9 22.0 95 21.2 19.5 109 Evening Star 9200 26.0 23.9 109 28.0 26.0 108 Marquette 8760 6.4 -M * 8.1 -M * Sylvan Lake 8420 20.3 19.1 106 22.0 21.2 104 Sylvan Road 7120 11.8 11.1 106 -M 16.0 * Younts Peak 8350 16.8 14.1 119 13.4 15.1 89 ----- ----- Basin Index (%) 106 103 POWDER RIVER Bear Trap Meadow 8200 8.7 5.1 171 8.8 8.0 110 Cloud Peak Reservoir 9860 13.8 14.0 99 13.0 12.5 104 Grave Springs 8550 9.7 8.8 110 10.0 9.9 101 Hansen Sawmill 8360 7.3 6.3 116 8.3 8.0 104 Middle Powder 7760 11.9 11.2 106 11.4 11.1 103 Powder River Pass 9480 11.9 9.9 120 12.0 11.9 101 Soldier Park 8720 6.7 -M * 8.2 -M * ----- ----- Basin Index (%) 114 103 TONGUE RIVER Big Goose 7990 8.6 8.7 99 9.2 10.5 88 Bone Springs Div 9350 16.6 15.6 106 13.8 14.7 94 Burgess Junction 7880 10.8 11.2 96 11.8 11.6 102 Dome Lake 8880 13.0 11.4 114 9.2 12.8 72 Little Goose 8870 10.4 -M * 8.0 -M * Sucker Creek 8880 13.0 11.4 114 12.4 13.5 92 Tie Creek 6870 7.9 5.4 146 12.2 10.8 113 ----- ----- Basin Index (%) 110 93 BELLE FOURCHE Blind Park 6890 6.3 7.2 88 7.9 11.2 71 Cole Canyon 5910 -M 5.8 * -M 8.7 * ----- ----- Basin Index (%) 88 71 CHEYENNE RIVER BASIN Blind Park 6890 6.3 7.2 88 7.9 11.2 71 North Rapid Creek 6130 7.3 6.7 109 7.9 9.2 86 ----- ----- Basin Index (%) 98 77 UPPER N. PLATTE Arapaho Ridge 10960 22.8 19.6 116 21.9 21.1 104 Blackhall Mtn 9820 30.2 -M * 28.7 -M * Columbine 9160 30.5 22.6 135 28.3 24.3 116 Divide Peak 8880 21.0 19.4 108 21.3 20.4 104 Joe Wright 10120 -M 20.1 * -M 24.5 * Laprele Creek 8375 12.3 9.4 131 12.4 11.7 106 Med Bow 10500 43.5 -M * 34.9 -M * Never Summer 10280 -M 19.4 * -M -M * North French Creek 10130 33.3 27.8 120 31.7 25.5 124 Old Battle 10000 31.9 29.2 109 29.1 33.4 87 Rawah 9020 12.8 10.3 124 14.0 13.5 104 Sage Creek Basin 7850 16.1 12.6 128 12.1 13.7 88 Sand Lake 10050 29.4 27.3 108 26.8 23.4 115 South Brush Creek 8440 13.9 12.2 114 12.9 14.5 89 Tower 10500 45.9 43.6 105 40.8 37.9 108 Webber Springs 9250 23.0 22.8 101 24.8 25.4 98 Whiskey Park 8950 32.8 25.5 129 31.0 26.7 116 Willow Creek Pass 9540 13.3 11.7 114 12.6 12.7 99 Zirkel 9340 29.0 26.3 110 30.6 27.1 113 ----- ----- Basin Index (%) 115 106 SWEETWATER Deer Park 9700 12.7 14.6 87 11.6 18.5 63 Larsen Creek 9000 6.2 12.1 51 8.0 -M * South Pass 9040 11.3 14.8 76 9.8 16.5 59 ----- ----- Basin Index (%) 73 61 LOWER N. PLATTE Casper Mtn. 7900 15.4 13.2 117 10.7 13.9 77 Laprele Creek 8375 12.3 9.4 131 12.4 11.7 106 Reno Hill 8400 16.5 13.0 127 16.6 14.4 115 Windy Peak 7900 9.9 7.8 127 8.7 10.0 87 ----- ----- Basin Index (%) 125 97 LARAMIE RIVER Brooklyn Lake 10240 27.6 19.7 140 26.1 20.0 130 Cinnabar Park 9574 23.0 19.8 116 25.3 22.9 110 Crow Creek 8330 7.7 6.7 115 10.6 10.1 105 Deadman Hill 10220 18.4 15.4 119 16.3 16.3 100 Rawah 9020 12.8 10.3 124 14.0 13.5 104 Roach 9700 15.3 15.4 99 15.6 18.2 86 Windy Peak 7900 9.9 7.8 127 8.7 10.0 87 ----- ----- Basin Index (%) 121 105 S. PLATTE Black Mountain 8920 10.9 -M * 13.0 -M * Crow Creek 8330 7.7 6.7 115 10.6 10.1 105 Deadman Hill 10220 18.4 15.4 119 16.3 16.3 100 ----- ----- Basin Index (%) 118 102 LITTLE SNAKE RIVER Battle Mountain 7440 12.8 10.7 120 14.0 14.4 97 Divide Peak 8880 21.0 19.4 108 21.3 20.4 104 Elk River 8700 20.4 18.3 111 17.6 19.1 92 Little Snake River 8915 28.2 22.9 123 32.3 28.2 115 Old Battle 10000 31.9 29.2 109 29.1 33.4 87 Sage Creek Basin 7850 16.1 12.6 128 12.1 13.7 88 Sandstone RS 8150 17.5 13.1 134 15.9 17.6 90 Whiskey Park 8950 32.8 25.5 129 31.0 26.7 116 ----- ----- Basin Index (%) 119 100 UPPER GREEN RIVER Big Sandy Opening 9080 9.2 12.3 75 8.0 12.6 63 Blind Bull Sum 8650 24.1 22.2 109 14.7 18.7 79 East Rim Divide 7930 11.3 9.9 114 9.2 11.3 81 Elkhart Park G.S. 9400 10.2 12.0 85 9.9 12.7 78 Gros Ventre Summit 8750 11.7 12.8 91 11.5 12.3 93 Gunsight Pass 9820 12.5 13.3 94 12.5 13.1 95 Indian Creek 9425 22.4 23.7 95 15.8 21.6 73 Kendall R.S. 7740 10.4 11.4 91 10.4 13.7 76 Loomis Park 8240 13.9 14.4 97 17.0 16.6 102 New Fork Lake 8340 10.1 10.3 98 8.4 10.3 82 Pocket Creek 9360 -M -M * 7.6 -M * Snider Basin 8060 12.8 12.1 106 13.6 13.6 100 Spring Creek Divide 9000 25.1 22.5 112 23.6 22.8 104 Triple Peak 8500 25.6 21.5 119 25.2 24.3 104 ----- ----- Basin Index (%) 100 88 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 12.4 10.8 115 11.2 10.9 103 Hewinta 9500 11.6 10.8 107 14.6 13.3 110 Hickerson Park 9122 11.0 7.4 149 11.6 9.6 121 Hole-in-Rock 9168 11.6 7.0 166 11.3 9.1 124 Indian Creek 9425 22.4 23.7 95 15.8 21.6 73 Kelley R.S. 8180 15.4 14.8 104 16.0 17.3 92 Spirit Lk 10235 17.9 -M * 18.2 -M * Steel Creek Park 10158 17.2 15.1 114 17.8 15.5 115 ----- ----- Basin Index (%) 113 101 UPPER BEAR RIVER Bear River RS 8777 10.6 -M * 11.3 -M * Bug Lake 7987 19.1 18.0 106 18.1 18.5 98 Burts Miller Ranch 8000 6.5 -M * 7.0 -M * Chalk Creek #1 9171 20.8 23.2 90 18.9 24.0 79 Hayden Fork 9130 17.2 15.0 115 20.1 20.0 100 Kelley R.S. 8180 15.4 14.8 104 16.0 17.3 92 Lily Lake 9133 12.3 12.0 102 12.8 16.2 79 Monte Cristo 8932 29.1 26.0 112 25.6 24.8 103 Salt River Summit 7640 14.8 12.8 116 15.1 15.9 95 Spring Creek Divide 9000 25.1 22.5 112 23.6 22.8 104 ----- ----- Basin Index (%) 107 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.