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 25 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 16.0 14.6 110 16.7 19.4 86 Black Bear 8170 31.2 33.9 92 29.1 35.3 82 Blind Bull Sum 8650 23.8 21.1 113 14.4 18.1 80 Cottonwood Creek 7670 25.0 20.5 122 27.2 22.7 120 East Rim Divide 7930 11.2 9.7 115 9.0 10.9 83 Grand Targhee 9260 38.7 33.9 114 27.4 27.7 99 Granite Creek 6770 16.4 14.8 111 -M 18.5 * Grassy Lake 7265 30.7 30.3 101 30.4 33.4 91 Gros Ventre Summit 8750 11.6 12.0 97 11.3 11.8 96 Gunsight Pass 9820 12.4 12.5 99 12.4 12.5 99 Lewis Lake Divide 7850 24.1 28.6 84 27.8 32.9 84 Phillips Bench 8200 27.6 23.1 119 26.8 25.9 103 Salt River Summit 7640 14.5 12.3 118 14.7 15.4 95 Snake River Station 6920 16.5 15.6 106 19.3 20.9 92 Spring Creek Divide 9000 24.5 21.9 112 23.1 22.0 105 Thumb Divide 7980 15.2 14.8 103 14.7 16.9 87 Togwotee Pass 9580 25.7 21.1 122 24.8 22.3 111 Two Ocean Plateau 9240 28.0 24.6 114 22.5 25.1 90 Willow Creek 8080 34.0 25.5 133 32.2 30.7 105 Younts Peak 8350 16.6 13.7 121 13.0 14.5 90 ----- ----- Basin Index (%) 110 95 MADISON-GALLATIN Black Bear 8170 31.2 33.9 92 29.1 35.3 82 Canyon 7870 13.8 12.0 115 14.0 14.9 94 Madison Plateau 7750 19.8 20.6 96 17.4 24.2 72 West Yellowstone 6700 10.7 10.0 107 8.6 12.9 67 Whiskey Creek 6800 14.4 14.4 100 16.2 18.6 87 ----- ----- Basin Index (%) 99 81 YELLOWSTONE Beartooth Lake 9360 21.1 20.1 105 19.4 18.1 107 Burnt Mtn 5880 7.6 4.8 158 12.9 11.2 115 Canyon 7870 13.8 12.0 115 14.0 14.9 94 Cole Creek 7850 15.9 12.5 127 12.5 11.2 112 Evening Star 9200 25.5 23.1 110 27.5 25.0 110 Fisher Creek 9100 29.9 28.6 105 30.7 29.3 105 Northeast Entrance 7350 10.3 9.5 108 11.8 11.2 105 Parker Peak 9400 23.9 18.0 133 21.7 16.1 135 Sylvan Lake 8420 19.7 18.6 106 21.4 20.4 105 Thumb Divide 7980 15.2 14.8 103 14.7 16.9 87 Two Ocean Plateau 9240 28.0 24.6 114 22.5 25.1 90 White Mill 8700 24.3 20.8 117 20.2 21.8 93 Wolverine 7650 12.0 8.9 135 12.0 11.2 107 Younts Peak 8350 16.6 13.7 121 13.0 14.5 90 ----- ----- Basin Index (%) 115 103 WIND RIVER Burroughs Creek 8750 12.0 -M * 13.1 -M * Castle Creek 8400 5.1 -M * 5.9 -M * Cold Springs 9630 7.0 6.7 104 6.3 8.8 72 Deer Park 9700 12.1 14.1 86 10.5 17.6 60 Hobbs Park 10100 12.2 12.5 98 10.1 11.5 88 Kirwin 9550 10.5 8.7 121 9.2 10.3 89 Little Warm 9370 11.1 9.7 114 8.9 11.5 77 Owl Creek 8975 6.0 4.7 128 6.3 5.2 121 South Pass 9040 10.7 14.4 74 9.1 15.7 58 St. Lawrence Alt 8620 4.8 6.4 75 6.5 7.8 83 Togwotee Pass 9580 25.7 21.1 122 24.8 22.3 111 Townsend Creek 8700 8.5 8.6 99 8.3 10.4 80 ----- ----- Basin Index (%) 102 83 BIGHORN BASIN Bald Mtn. 9380 19.7 16.8 117 15.3 15.3 100 Bear Trap Meadow 8200 8.8 5.2 169 8.9 7.4 120 Bone Springs Div 9350 16.4 14.3 115 13.5 13.8 98 Grave Springs 8550 9.5 8.3 114 10.0 9.3 108 Kirwin 9550 10.5 8.7 121 9.2 10.3 89 Marquette 8760 6.4 -M * 8.1 -M * Middle Powder 7760 12.0 10.4 115 11.4 10.4 110 Owl Creek 8975 6.0 4.7 128 6.3 5.2 121 Powder River Pass 9480 11.8 9.5 124 11.9 11.3 105 Shell Creek 9580 14.1 13.3 106 13.2 12.3 107 Timber Creek 7950 5.4 4.2 129 6.3 6.4 98 ----- ----- Basin Index (%) 120 104 SHOSHONE RIVER Blackwater 9780 20.4 21.1 97 20.5 18.6 110 Evening Star 9200 25.5 23.1 110 27.5 25.0 110 Marquette 8760 6.4 -M * 8.1 -M * Sylvan Lake 8420 19.7 18.6 106 21.4 20.4 105 Sylvan Road 7120 11.6 10.7 108 -M 15.5 * Younts Peak 8350 16.6 13.7 121 13.0 14.5 90 ----- ----- Basin Index (%) 108 105 POWDER RIVER Bear Trap Meadow 8200 8.8 5.2 169 8.9 7.4 120 Cloud Peak Reservoir 9860 13.4 13.4 100 12.6 11.7 108 Grave Springs 8550 9.5 8.3 114 10.0 9.3 108 Hansen Sawmill 8360 6.9 6.0 115 7.9 7.5 105 Middle Powder 7760 12.0 10.4 115 11.4 10.4 110 Powder River Pass 9480 11.8 9.5 124 11.9 11.3 105 Soldier Park 8720 6.4 -M * 8.0 -M * ----- ----- Basin Index (%) 118 109 TONGUE RIVER Big Goose 7990 8.5 8.1 105 9.2 9.6 96 Bone Springs Div 9350 16.4 14.3 115 13.5 13.8 98 Burgess Junction 7880 10.7 10.1 106 11.7 10.8 108 Dome Lake 8880 12.9 10.7 121 9.0 12.0 75 Little Goose 8870 10.2 -M * 7.8 -M * Sucker Creek 8880 12.8 11.1 115 12.1 12.7 95 Tie Creek 6870 8.0 5.2 154 12.1 10.0 121 ----- ----- Basin Index (%) 116 98 BELLE FOURCHE Blind Park 6890 6.3 7.0 90 7.8 10.7 73 Cole Canyon 5910 -M 5.7 * -M 8.2 * ----- ----- Basin Index (%) 90 73 CHEYENNE RIVER BASIN Blind Park 6890 6.3 7.0 90 7.8 10.7 73 North Rapid Creek 6130 7.1 6.7 106 7.7 8.8 88 ----- ----- Basin Index (%) 98 79 UPPER N. PLATTE Arapaho Ridge 10960 22.5 18.5 122 21.5 20.3 106 Blackhall Mtn 9820 29.3 -M * 27.9 -M * Columbine 9160 31.5 22.0 143 28.0 23.5 119 Divide Peak 8880 20.1 18.3 110 20.5 19.6 105 Joe Wright 10120 -M 19.4 * -M 23.5 * Laprele Creek 8375 11.8 9.4 126 11.8 11.2 105 Med Bow 10500 42.3 -M * 33.9 -M * Never Summer 10280 19.5 18.5 105 14.6 -M * North French Creek 10130 32.5 26.6 122 31.0 24.5 127 Old Battle 10000 30.5 27.6 111 27.7 32.2 86 Rawah 9020 12.4 9.8 127 14.0 12.7 110 Sage Creek Basin 7850 15.5 11.9 130 11.6 13.2 88 Sand Lake 10050 28.4 25.7 111 25.8 22.4 115 South Brush Creek 8440 13.4 11.6 116 12.5 13.8 91 Tower 10500 45.5 41.3 110 40.1 36.7 109 Webber Springs 9250 21.9 21.8 100 23.7 24.5 97 Whiskey Park 8950 32.2 24.6 131 30.3 25.7 118 Willow Creek Pass 9540 13.0 11.2 116 12.3 12.0 102 Zirkel 9340 28.6 25.6 112 30.2 26.1 116 ----- ----- Basin Index (%) 117 107 SWEETWATER Deer Park 9700 12.1 14.1 86 10.5 17.6 60 Larsen Creek 9000 6.0 11.6 52 7.7 -M * South Pass 9040 10.7 14.4 74 9.1 15.7 58 ----- ----- Basin Index (%) 72 59 LOWER N. PLATTE Casper Mtn. 7900 15.1 12.7 119 10.1 13.3 76 Laprele Creek 8375 11.8 9.4 126 11.8 11.2 105 Reno Hill 8400 15.9 12.4 128 16.0 13.6 118 Windy Peak 7900 9.4 7.5 125 8.4 9.4 89 ----- ----- Basin Index (%) 124 97 LARAMIE RIVER Brooklyn Lake 10240 26.8 18.3 146 25.3 19.1 132 Cinnabar Park 9574 22.8 19.2 119 24.5 22.0 111 Crow Creek 8330 7.5 6.9 109 10.2 9.6 106 Deadman Hill 10220 17.9 14.4 124 15.7 15.5 101 Rawah 9020 12.4 9.8 127 14.0 12.7 110 Roach 9700 15.2 14.4 106 15.4 17.4 89 Windy Peak 7900 9.4 7.5 125 8.4 9.4 89 ----- ----- Basin Index (%) 124 107 S. PLATTE Black Mountain 8920 10.4 -M * 12.4 -M * Crow Creek 8330 7.5 6.9 109 10.2 9.6 106 Deadman Hill 10220 17.9 14.4 124 15.7 15.5 101 ----- ----- Basin Index (%) 119 103 LITTLE SNAKE RIVER Battle Mountain 7440 12.4 11.2 111 13.4 13.9 96 Divide Peak 8880 20.1 18.3 110 20.5 19.6 105 Elk River 8700 20.2 17.6 115 17.0 18.4 92 Little Snake River 8915 27.1 21.6 125 31.4 27.1 116 Old Battle 10000 30.5 27.6 111 27.7 32.2 86 Sage Creek Basin 7850 15.5 11.9 130 11.6 13.2 88 Sandstone RS 8150 16.5 12.9 128 15.0 17.1 88 Whiskey Park 8950 32.2 24.6 131 30.3 25.7 118 ----- ----- Basin Index (%) 120 100 UPPER GREEN RIVER Big Sandy Opening 9080 8.9 11.9 75 7.7 12.1 64 Blind Bull Sum 8650 23.8 21.1 113 14.4 18.1 80 East Rim Divide 7930 11.2 9.7 115 9.0 10.9 83 Elkhart Park G.S. 9400 10.1 11.2 90 9.8 12.2 80 Gros Ventre Summit 8750 11.6 12.0 97 11.3 11.8 96 Gunsight Pass 9820 12.4 12.5 99 12.4 12.5 99 Indian Creek 9425 21.6 22.2 97 15.2 20.7 73 Kendall R.S. 7740 10.1 11.4 89 10.2 13.2 77 Loomis Park 8240 13.7 14.0 98 16.6 16.0 104 New Fork Lake 8340 10.1 9.7 104 -M 10.0 * Pocket Creek 9360 -M -M * 7.5 -M * Snider Basin 8060 13.1 11.3 116 13.2 13.1 101 Spring Creek Divide 9000 24.5 21.9 112 23.1 22.0 105 Triple Peak 8500 25.2 20.3 124 24.8 23.4 106 ----- ----- Basin Index (%) 104 90 LOWER GREEN RIVER Blacks Fork Jct 8869 8.0 -M * 11.4 -M * Buck Pasture 9632 17.2 -M * 16.2 -M * EF Blacks Fork GS 9360 13.8 -M * 11.2 -M * Hams Fork 7840 11.9 10.5 113 10.6 10.5 101 Hewinta 9500 10.6 9.9 107 13.9 12.7 109 Hickerson Park 9122 9.9 6.9 143 10.9 9.2 118 Hole-in-Rock 9168 11.0 6.9 159 10.7 8.6 124 Indian Creek 9425 21.6 22.2 97 15.2 20.7 73 Kelley R.S. 8180 14.9 14.1 106 15.4 16.7 92 Spirit Lk 10235 17.1 -M * 17.5 -M * Steel Creek Park 10158 16.5 13.8 120 17.1 14.7 116 ----- ----- Basin Index (%) 114 101 UPPER BEAR RIVER Bear River RS 8777 9.0 -M * 10.4 -M * Bug Lake 7987 18.2 17.3 105 17.3 17.8 97 Burts Miller Ranch 8000 5.4 -M * 6.5 -M * Chalk Creek #1 9171 19.1 22.1 86 17.6 22.9 77 Hayden Fork 9130 16.1 14.5 111 19.3 19.1 101 Kelley R.S. 8180 14.9 14.1 106 15.4 16.7 92 Lily Lake 9133 11.3 11.6 97 11.8 15.5 76 Monte Cristo 8932 27.5 25.1 110 23.4 23.7 99 Salt River Summit 7640 14.5 12.3 118 14.7 15.4 95 Spring Creek Divide 9000 24.5 21.9 112 23.1 22.0 105 ----- ----- Basin Index (%) 105 93 ----------------------------------------------------------------------------- -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.