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: MARCH 27 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 16.3 14.7 111 16.6 19.7 84 Black Bear 8170 31.5 34.6 91 29.4 35.6 83 Blind Bull Sum 8650 23.8 21.3 112 14.4 18.3 79 Cottonwood Creek 7670 25.3 20.6 123 27.3 23.0 119 East Rim Divide 7930 11.5 9.8 117 8.9 11.0 81 Grand Targhee 9260 38.7 34.6 112 27.2 28.3 96 Granite Creek 6770 16.3 14.8 110 -M 18.7 * Grassy Lake 7265 30.7 30.8 100 30.4 33.9 90 Gros Ventre Summit 8750 11.6 12.2 95 11.1 11.9 93 Gunsight Pass 9820 12.4 12.9 96 12.2 12.7 96 Lewis Lake Divide 7850 24.0 29.0 83 28.0 33.2 84 Phillips Bench 8200 -M 23.4 * -M 26.4 * Salt River Summit 7640 14.6 12.5 117 14.8 15.6 95 Snake River Station 6920 16.5 15.8 104 19.4 21.1 92 Spring Creek Divide 9000 24.7 22.2 111 23.1 22.3 104 Thumb Divide 7980 15.2 15.1 101 14.7 17.2 85 Togwotee Pass 9580 25.8 21.3 121 24.9 22.6 110 Two Ocean Plateau 9240 28.1 25.0 112 22.6 25.4 89 Willow Creek 8080 34.6 26.2 132 32.7 31.2 105 Younts Peak 8350 16.4 13.8 119 12.6 14.7 86 ----- ----- Basin Index (%) 108 93 MADISON-GALLATIN Black Bear 8170 31.5 34.6 91 29.4 35.6 83 Canyon 7870 13.9 12.1 115 14.1 15.0 94 Madison Plateau 7750 20.1 20.8 97 17.7 24.5 72 West Yellowstone 6700 11.2 10.1 111 8.7 13.1 66 Whiskey Creek 6800 14.4 14.6 99 16.2 18.8 86 ----- ----- Basin Index (%) 99 80 YELLOWSTONE Beartooth Lake 9360 21.7 20.4 106 20.1 18.4 109 Burnt Mtn 5880 7.7 4.7 164 12.7 11.4 111 Canyon 7870 13.9 12.1 115 14.1 15.0 94 Cole Creek 7850 16.1 12.8 126 12.6 11.4 111 Evening Star 9200 25.5 23.5 109 27.7 25.4 109 Fisher Creek 9100 30.3 28.9 105 30.9 29.6 104 Northeast Entrance 7350 10.6 9.7 109 11.8 11.4 104 Parker Peak 9400 23.8 18.3 130 21.7 16.3 133 Sylvan Lake 8420 20.0 18.8 106 21.5 20.7 104 Thumb Divide 7980 15.2 15.1 101 14.7 17.2 85 Two Ocean Plateau 9240 28.1 25.0 112 22.6 25.4 89 White Mill 8700 24.6 21.1 117 20.5 22.0 93 Wolverine 7650 11.9 8.9 134 11.9 11.3 105 Younts Peak 8350 16.4 13.8 119 12.6 14.7 86 ----- ----- Basin Index (%) 114 102 WIND RIVER Burroughs Creek 8750 11.8 -M * 12.6 -M * Castle Creek 8400 5.2 -M * 5.6 -M * Cold Springs 9630 7.1 6.9 103 6.1 9.0 68 Deer Park 9700 12.6 14.2 89 11.1 17.9 62 Hobbs Park 10100 12.2 12.8 95 10.3 11.8 87 Kirwin 9550 10.3 8.9 116 9.0 10.5 86 Little Warm 9370 11.0 9.9 111 8.2 11.8 69 Owl Creek 8975 6.1 4.8 127 6.1 5.4 113 South Pass 9040 11.2 14.4 78 9.6 16.0 60 St. Lawrence Alt 8620 4.8 6.6 73 6.5 8.0 81 Togwotee Pass 9580 25.8 21.3 121 24.9 22.6 110 Townsend Creek 8700 8.5 8.7 98 8.4 10.6 79 ----- ----- Basin Index (%) 101 81 BIGHORN BASIN Bald Mtn. 9380 19.7 17.3 114 14.9 15.5 96 Bear Trap Meadow 8200 8.7 5.1 171 8.7 7.6 114 Bone Springs Div 9350 16.6 14.7 113 13.4 14.1 95 Grave Springs 8550 9.5 8.4 113 9.9 9.4 105 Kirwin 9550 10.3 8.9 116 9.0 10.5 86 Marquette 8760 6.4 -M * 8.0 -M * Middle Powder 7760 11.9 10.6 112 11.3 10.6 107 Owl Creek 8975 6.1 4.8 127 6.1 5.4 113 Powder River Pass 9480 11.9 9.6 124 11.9 11.4 104 Shell Creek 9580 14.1 13.7 103 13.3 12.5 106 Timber Creek 7950 4.9 4.3 114 6.3 6.5 97 ----- ----- Basin Index (%) 117 101 SHOSHONE RIVER Blackwater 9780 20.6 21.4 96 21.0 18.9 111 Evening Star 9200 25.5 23.5 109 27.7 25.4 109 Marquette 8760 6.4 -M * 8.0 -M * Sylvan Lake 8420 20.0 18.8 106 21.5 20.7 104 Sylvan Road 7120 11.9 10.9 109 -M 15.7 * Younts Peak 8350 16.4 13.8 119 12.6 14.7 86 ----- ----- Basin Index (%) 107 104 POWDER RIVER Bear Trap Meadow 8200 8.7 5.1 171 8.7 7.6 114 Cloud Peak Reservoir 9860 13.5 13.5 100 12.4 11.9 104 Grave Springs 8550 9.5 8.4 113 9.9 9.4 105 Hansen Sawmill 8360 6.8 6.1 111 7.9 7.7 103 Middle Powder 7760 11.9 10.6 112 11.3 10.6 107 Powder River Pass 9480 11.9 9.6 124 11.9 11.4 104 Soldier Park 8720 6.3 -M * 7.9 -M * ----- ----- Basin Index (%) 117 106 TONGUE RIVER Big Goose 7990 8.4 8.3 101 9.4 9.8 96 Bone Springs Div 9350 16.6 14.7 113 13.4 14.1 95 Burgess Junction 7880 10.8 10.5 103 11.6 11.1 105 Dome Lake 8880 12.9 11.0 117 8.8 12.2 72 Little Goose 8870 10.3 -M * 7.8 -M * Sucker Creek 8880 12.9 11.1 116 11.8 12.9 91 Tie Creek 6870 8.1 5.3 153 12.1 10.2 119 ----- ----- Basin Index (%) 114 95 BELLE FOURCHE Blind Park 6890 6.6 7.1 93 7.9 10.8 73 Cole Canyon 5910 -M 5.7 * -M 8.3 * ----- ----- Basin Index (%) 93 73 CHEYENNE RIVER BASIN Blind Park 6890 6.6 7.1 93 7.9 10.8 73 North Rapid Creek 6130 7.4 6.7 110 7.9 8.9 89 ----- ----- Basin Index (%) 101 80 UPPER N. PLATTE Arapaho Ridge 10960 22.5 18.9 119 21.4 20.5 104 Blackhall Mtn 9820 29.4 -M * 28.1 -M * Columbine 9160 31.2 22.0 142 27.9 23.8 117 Divide Peak 8880 20.5 18.8 109 20.8 19.8 105 Joe Wright 10120 -M 19.7 * -M 23.8 * Laprele Creek 8375 12.2 9.4 130 12.1 11.4 106 Med Bow 10500 42.6 -M * 33.9 -M * Never Summer 10280 19.5 18.7 104 14.5 -M * North French Creek 10130 32.8 27.0 121 31.3 24.8 126 Old Battle 10000 30.8 28.1 110 27.7 32.5 85 Rawah 9020 12.2 10.0 122 13.9 12.9 108 Sage Creek Basin 7850 15.5 12.2 127 11.7 13.4 87 Sand Lake 10050 28.7 26.1 110 26.2 22.7 115 South Brush Creek 8440 13.6 11.8 115 12.7 14.0 91 Tower 10500 45.3 41.9 108 40.3 37.1 109 Webber Springs 9250 22.1 22.3 99 23.9 24.8 96 Whiskey Park 8950 32.1 24.8 129 30.4 26.0 117 Willow Creek Pass 9540 13.0 11.4 114 12.3 12.2 101 Zirkel 9340 28.6 25.9 110 30.2 26.5 114 ----- ----- Basin Index (%) 116 106 SWEETWATER Deer Park 9700 12.6 14.2 89 11.1 17.9 62 Larsen Creek 9000 -M 11.8 * -M -M * South Pass 9040 11.2 14.4 78 9.6 16.0 60 ----- ----- Basin Index (%) 83 61 LOWER N. PLATTE Casper Mtn. 7900 15.4 12.8 120 10.6 13.4 79 Laprele Creek 8375 12.2 9.4 130 12.1 11.4 106 Reno Hill 8400 16.3 12.6 129 16.3 13.8 118 Windy Peak 7900 9.7 7.7 126 8.5 9.6 89 ----- ----- Basin Index (%) 126 99 LARAMIE RIVER Brooklyn Lake 10240 27.0 18.7 144 25.4 19.3 132 Cinnabar Park 9574 22.7 19.5 116 24.7 22.4 110 Crow Creek 8330 7.5 6.9 109 10.2 9.7 105 Deadman Hill 10220 17.8 14.8 120 15.7 15.8 99 Rawah 9020 12.2 10.0 122 13.9 12.9 108 Roach 9700 15.2 14.7 103 15.5 17.6 88 Windy Peak 7900 9.7 7.7 126 8.5 9.6 89 ----- ----- Basin Index (%) 121 106 S. PLATTE Black Mountain 8920 10.3 -M * 12.4 -M * Crow Creek 8330 7.5 6.9 109 10.2 9.7 105 Deadman Hill 10220 17.8 14.8 120 15.7 15.8 99 ----- ----- Basin Index (%) 117 102 LITTLE SNAKE RIVER Battle Mountain 7440 12.3 11.0 112 13.3 14.0 95 Divide Peak 8880 20.5 18.8 109 20.8 19.8 105 Elk River 8700 20.1 17.8 113 17.2 18.6 92 Little Snake River 8915 27.3 21.9 125 31.5 27.5 115 Old Battle 10000 30.8 28.1 110 27.7 32.5 85 Sage Creek Basin 7850 15.5 12.2 127 11.7 13.4 87 Sandstone RS 8150 16.8 13.0 129 15.2 17.2 88 Whiskey Park 8950 32.1 24.8 129 30.4 26.0 117 ----- ----- Basin Index (%) 119 99 UPPER GREEN RIVER Big Sandy Opening 9080 9.1 12.0 76 7.8 12.3 63 Blind Bull Sum 8650 23.8 21.3 112 14.4 18.3 79 East Rim Divide 7930 11.5 9.8 117 8.9 11.0 81 Elkhart Park G.S. 9400 9.9 11.5 86 9.7 12.3 79 Gros Ventre Summit 8750 11.6 12.2 95 11.1 11.9 93 Gunsight Pass 9820 12.4 12.9 96 12.2 12.7 96 Indian Creek 9425 22.0 22.7 97 15.5 21.0 74 Kendall R.S. 7740 10.2 11.3 90 10.1 13.5 75 Loomis Park 8240 13.9 14.3 97 16.6 16.2 102 New Fork Lake 8340 10.3 9.9 104 -M 10.1 * Pocket Creek 9360 -M -M * 7.5 -M * Snider Basin 8060 12.8 11.5 111 13.2 13.2 100 Spring Creek Divide 9000 24.7 22.2 111 23.1 22.3 104 Triple Peak 8500 25.2 20.7 122 24.9 23.7 105 ----- ----- Basin Index (%) 103 89 LOWER GREEN RIVER Blacks Fork Jct 8869 8.3 -M * 11.7 -M * Buck Pasture 9632 17.7 -M * 16.7 -M * EF Blacks Fork GS 9360 14.3 -M * 11.6 -M * Hams Fork 7840 12.3 10.6 116 10.9 10.6 103 Hewinta 9500 11.1 10.0 111 14.3 12.9 111 Hickerson Park 9122 10.8 7.0 154 11.5 9.3 124 Hole-in-Rock 9168 11.5 6.9 167 11.1 8.7 128 Indian Creek 9425 22.0 22.7 97 15.5 21.0 74 Kelley R.S. 8180 15.0 14.4 104 15.5 17.0 91 Spirit Lk 10235 17.6 -M * 18.0 -M * Steel Creek Park 10158 17.0 14.2 120 17.6 15.0 117 ----- ----- Basin Index (%) 116 102 UPPER BEAR RIVER Bear River RS 8777 9.9 -M * 10.9 -M * Bug Lake 7987 18.9 17.6 107 17.8 18.1 98 Burts Miller Ranch 8000 6.0 -M * 6.8 -M * Chalk Creek #1 9171 20.1 22.4 90 18.3 23.2 79 Hayden Fork 9130 16.9 14.6 116 19.9 19.4 103 Kelley R.S. 8180 15.0 14.4 104 15.5 17.0 91 Lily Lake 9133 12.1 11.8 103 12.6 15.7 80 Monte Cristo 8932 28.8 25.3 114 23.8 24.2 98 Salt River Summit 7640 14.6 12.5 117 14.8 15.6 95 Spring Creek Divide 9000 24.7 22.2 111 23.1 22.3 104 ----- ----- 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.