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: MARCH 18 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 15.4 14.6 105 15.9 18.9 84 Black Bear 8170 30.3 32.2 94 28.2 34.2 82 Blind Bull Sum 8650 22.6 20.3 111 13.5 17.5 77 Cottonwood Creek 7670 23.7 19.5 122 25.9 21.7 119 East Rim Divide 7930 10.8 9.5 114 8.7 10.5 83 Grand Targhee 9260 36.8 32.8 112 26.2 26.8 98 Granite Creek 6770 15.9 15.0 106 -M 18.0 * Grassy Lake 7265 29.2 29.1 100 28.9 32.3 89 Gros Ventre Summit 8750 10.8 11.4 95 10.7 11.3 95 Gunsight Pass 9820 11.4 11.9 96 11.4 12.0 95 Lewis Lake Divide 7850 22.8 27.5 83 26.1 31.8 82 Phillips Bench 8200 26.7 22.2 120 26.0 25.1 104 Salt River Summit 7640 13.4 11.9 113 13.7 14.8 93 Snake River Station 6920 15.6 15.2 103 18.2 20.2 90 Spring Creek Divide 9000 22.9 20.7 111 21.7 21.2 102 Thumb Divide 7980 14.1 13.9 101 13.7 16.3 84 Togwotee Pass 9580 24.8 20.4 122 23.9 21.5 111 Two Ocean Plateau 9240 26.7 23.8 112 21.7 24.1 90 Willow Creek 8080 32.4 25.3 128 30.7 29.6 104 Younts Peak 8350 15.9 13.2 120 12.6 14.0 90 ----- ----- Basin Index (%) 108 94 MADISON-GALLATIN Black Bear 8170 30.3 32.2 94 28.2 34.2 82 Canyon 7870 13.1 11.7 112 13.3 14.4 92 Madison Plateau 7750 19.2 20.0 96 17.0 23.4 73 West Yellowstone 6700 10.4 9.9 105 8.4 12.6 67 Whiskey Creek 6800 14.0 13.9 101 15.8 18.0 88 ----- ----- Basin Index (%) 99 81 YELLOWSTONE Beartooth Lake 9360 20.3 19.0 107 18.8 17.5 107 Burnt Mtn 5880 -M 4.5 * 12.2 10.6 115 Canyon 7870 13.1 11.7 112 13.3 14.4 92 Cole Creek 7850 15.4 11.8 131 12.0 10.5 114 Evening Star 9200 24.8 21.9 113 26.9 24.2 111 Fisher Creek 9100 28.6 28.1 102 29.4 28.3 104 Northeast Entrance 7350 10.0 8.9 112 11.3 10.9 104 Parker Peak 9400 23.3 17.5 133 21.3 15.5 137 Sylvan Lake 8420 18.9 17.9 106 20.7 19.7 105 Thumb Divide 7980 14.1 13.9 101 13.7 16.3 84 Two Ocean Plateau 9240 26.7 23.8 112 21.7 24.1 90 White Mill 8700 23.4 19.7 119 19.5 21.0 93 Wolverine 7650 11.9 8.8 135 11.8 10.8 109 Younts Peak 8350 15.9 13.2 120 12.6 14.0 90 ----- ----- Basin Index (%) 114 103 WIND RIVER Burroughs Creek 8750 11.3 -M * 12.5 -M * Castle Creek 8400 4.9 -M * 5.7 -M * Cold Springs 9630 6.8 6.2 110 6.1 8.4 73 Deer Park 9700 11.0 12.8 86 9.7 16.9 57 Hobbs Park 10100 11.7 11.5 102 9.8 10.9 90 Kirwin 9550 10.2 8.3 123 9.0 9.8 92 Little Warm 9370 10.3 9.1 113 8.3 11.0 75 Owl Creek 8975 5.9 4.6 128 6.2 4.9 127 South Pass 9040 9.7 13.4 72 8.5 15.1 56 St. Lawrence Alt 8620 4.7 6.0 78 6.3 7.4 85 Togwotee Pass 9580 24.8 20.4 122 23.9 21.5 111 Townsend Creek 8700 7.9 8.0 99 8.1 9.9 82 ----- ----- Basin Index (%) 103 83 BIGHORN BASIN Bald Mtn. 9380 19.5 16.4 119 15.4 14.6 105 Bear Trap Meadow 8200 8.7 4.9 178 8.7 6.9 126 Bone Springs Div 9350 15.9 13.9 114 13.1 13.2 99 Grave Springs 8550 9.3 8.0 116 9.8 8.8 111 Kirwin 9550 10.2 8.3 123 9.0 9.8 92 Marquette 8760 6.4 -M * 8.0 -M * Middle Powder 7760 11.8 9.5 124 11.3 9.8 115 Owl Creek 8975 5.9 4.6 128 6.2 4.9 127 Powder River Pass 9480 11.6 9.0 129 11.8 10.6 111 Shell Creek 9580 13.8 12.7 109 13.2 11.7 113 Timber Creek 7950 5.3 4.2 126 6.2 6.0 103 ----- ----- Basin Index (%) 122 109 SHOSHONE RIVER Blackwater 9780 19.7 20.5 96 20.2 17.9 113 Evening Star 9200 24.8 21.9 113 26.9 24.2 111 Marquette 8760 6.4 -M * 8.0 -M * Sylvan Lake 8420 18.9 17.9 106 20.7 19.7 105 Sylvan Road 7120 11.1 10.3 108 -M 15.0 * Younts Peak 8350 15.9 13.2 120 12.6 14.0 90 ----- ----- Basin Index (%) 108 106 POWDER RIVER Bear Trap Meadow 8200 8.7 4.9 178 8.7 6.9 126 Cloud Peak Reservoir 9860 13.5 12.6 107 12.5 11.0 114 Grave Springs 8550 9.3 8.0 116 9.8 8.8 111 Hansen Sawmill 8360 6.8 5.5 124 7.8 7.0 111 Middle Powder 7760 11.8 9.5 124 11.3 9.8 115 Powder River Pass 9480 11.6 9.0 129 11.8 10.6 111 Soldier Park 8720 6.4 -M * 7.9 -M * ----- ----- Basin Index (%) 125 114 TONGUE RIVER Big Goose 7990 8.4 7.6 111 9.1 8.9 102 Bone Springs Div 9350 15.9 13.9 114 13.1 13.2 99 Burgess Junction 7880 10.5 9.4 112 11.6 10.3 113 Dome Lake 8880 12.7 10.0 127 8.9 11.2 79 Little Goose 8870 10.1 -M * 7.8 -M * Sucker Creek 8880 12.7 10.7 119 12.0 12.0 100 Tie Creek 6870 7.8 4.9 159 11.9 9.6 124 ----- ----- Basin Index (%) 120 102 BELLE FOURCHE Blind Park 6890 6.8 7.2 94 7.7 10.4 74 Cole Canyon 5910 -M 5.5 * -M 7.8 * ----- ----- Basin Index (%) 94 74 CHEYENNE RIVER BASIN Blind Park 6890 6.8 7.2 94 7.7 10.4 74 North Rapid Creek 6130 7.4 6.4 116 7.7 8.5 91 ----- ----- Basin Index (%) 104 81 UPPER N. PLATTE Arapaho Ridge 10960 20.8 18.0 116 19.9 19.4 103 Blackhall Mtn 9820 26.8 -M * 26.0 -M * Columbine 9160 30.9 21.8 142 26.6 22.6 118 Divide Peak 8880 18.8 17.4 108 19.4 18.8 103 Joe Wright 10120 19.7 18.9 104 24.1 22.5 107 Laprele Creek 8375 11.4 9.0 127 11.6 10.6 109 Med Bow 10500 39.9 -M * 32.1 -M * Never Summer 10280 18.1 17.6 103 13.3 -M * North French Creek 10130 31.0 24.6 126 29.5 23.4 126 Old Battle 10000 28.0 26.2 107 26.1 31.0 84 Rawah 9020 11.5 9.2 125 13.3 11.8 113 Sage Creek Basin 7850 14.4 11.6 124 11.1 12.9 86 Sand Lake 10050 26.4 24.2 109 24.2 21.3 114 South Brush Creek 8440 12.5 11.1 113 12.0 13.1 92 Tower 10500 42.4 39.5 107 38.2 35.3 108 Webber Springs 9250 20.0 20.9 96 21.9 23.5 93 Whiskey Park 8950 30.9 24.1 128 29.0 24.7 117 Willow Creek Pass 9540 11.9 10.8 110 11.3 11.6 97 Zirkel 9340 27.1 25.8 105 28.3 25.1 113 ----- ----- Basin Index (%) 114 106 SWEETWATER Deer Park 9700 11.0 12.8 86 9.7 16.9 57 Larsen Creek 9000 5.0 11.0 45 6.8 -M * South Pass 9040 9.7 13.4 72 8.5 15.1 56 ----- ----- Basin Index (%) 69 57 LOWER N. PLATTE Casper Mtn. 7900 14.6 12.0 122 9.8 12.5 78 Laprele Creek 8375 11.4 9.0 127 11.6 10.6 109 Reno Hill 8400 15.5 11.8 131 15.8 12.7 124 Windy Peak 7900 9.1 6.9 132 8.1 8.9 91 ----- ----- Basin Index (%) 127 101 LARAMIE RIVER Brooklyn Lake 10240 25.0 17.5 143 23.9 18.1 132 Cinnabar Park 9574 21.8 17.8 122 23.5 21.1 111 Crow Creek 8330 7.0 7.0 100 9.6 8.7 110 Deadman Hill 10220 16.5 13.7 120 14.5 14.7 99 Rawah 9020 11.5 9.2 125 13.3 11.8 113 Roach 9700 13.7 13.8 99 14.0 16.6 84 Windy Peak 7900 9.1 6.9 132 8.1 8.9 91 ----- ----- Basin Index (%) 122 107 S. PLATTE Black Mountain 8920 9.0 -M * 11.3 -M * Crow Creek 8330 7.0 7.0 100 9.6 8.7 110 Deadman Hill 10220 16.5 13.7 120 14.5 14.7 99 ----- ----- Basin Index (%) 114 103 LITTLE SNAKE RIVER Battle Mountain 7440 11.9 11.2 106 13.0 13.4 97 Divide Peak 8880 18.8 17.4 108 19.4 18.8 103 Elk River 8700 19.8 17.3 114 16.5 17.7 93 Little Snake River 8915 25.4 20.8 122 29.8 26.2 114 Old Battle 10000 28.0 26.2 107 26.1 31.0 84 Sage Creek Basin 7850 14.4 11.6 124 11.1 12.9 86 Sandstone RS 8150 15.6 11.8 132 14.2 16.5 86 Whiskey Park 8950 30.9 24.1 128 29.0 24.7 117 ----- ----- Basin Index (%) 117 99 UPPER GREEN RIVER Big Sandy Opening 9080 8.2 11.4 72 7.1 11.6 61 Blind Bull Sum 8650 22.6 20.3 111 13.5 17.5 77 East Rim Divide 7930 10.8 9.5 114 8.7 10.5 83 Elkhart Park G.S. 9400 9.5 10.5 90 9.4 11.7 80 Gros Ventre Summit 8750 10.8 11.4 95 10.7 11.3 95 Gunsight Pass 9820 11.4 11.9 96 11.4 12.0 95 Indian Creek 9425 20.0 21.0 95 14.0 19.8 71 Kendall R.S. 7740 9.3 11.1 84 9.4 12.8 73 Loomis Park 8240 13.0 13.2 98 16.0 15.4 104 New Fork Lake 8340 9.5 9.2 103 -M 9.6 * Pocket Creek 9360 -M -M * 6.8 -M * Snider Basin 8060 12.1 10.9 111 12.6 12.7 99 Spring Creek Divide 9000 22.9 20.7 111 21.7 21.2 102 Triple Peak 8500 23.8 19.2 124 23.7 22.5 105 ----- ----- Basin Index (%) 102 88 LOWER GREEN RIVER Blacks Fork Jct 8869 7.3 -M * 10.6 -M * Buck Pasture 9632 16.2 -M * 15.3 -M * EF Blacks Fork GS 9360 12.9 -M * 8.6 -M * Hams Fork 7840 11.0 10.2 108 9.7 10.0 97 Hewinta 9500 9.6 9.6 100 12.9 12.2 106 Hickerson Park 9122 9.8 6.6 148 10.0 8.7 115 Hole-in-Rock 9168 9.8 6.5 151 9.7 8.2 118 Indian Creek 9425 20.0 21.0 95 14.0 19.8 71 Kelley R.S. 8180 13.7 13.2 104 14.2 16.0 89 Spirit Lk 10235 15.6 -M * 16.3 -M * Steel Creek Park 10158 15.1 13.3 114 15.8 14.1 112 ----- ----- Basin Index (%) 111 97 UPPER BEAR RIVER Bear River RS 8777 8.3 -M * 9.7 -M * Bug Lake 7987 16.4 16.5 99 15.5 17.2 90 Burts Miller Ranch 8000 5.2 -M * 6.3 -M * Chalk Creek #1 9171 17.7 20.8 85 16.3 21.9 74 Hayden Fork 9130 14.1 14.2 99 18.0 18.3 98 Kelley R.S. 8180 13.7 13.2 104 14.2 16.0 89 Lily Lake 9133 10.4 11.4 91 10.8 14.8 73 Monte Cristo 8932 24.4 24.1 101 21.3 22.8 93 Salt River Summit 7640 13.4 11.9 113 13.7 14.8 93 Spring Creek Divide 9000 22.9 20.7 111 21.7 21.2 102 ----- ----- Basin Index (%) 100 89 ----------------------------------------------------------------------------- -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.