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 SUNDAY: APRIL 21 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 17.4 11.7 149 23.9 21.8 110 Black Bear 8170 43.1 36.9 117 48.3 40.0 121 Blind Bull Sum 8650 25.8 24.1 107 20.7 20.3 102 Cottonwood Creek 7670 21.6 18.3 118 28.8 26.0 111 East Rim Divide 7930 8.3 9.4 88 13.0 12.3 106 Grand Targhee 9260 47.3 42.2 112 36.7 32.8 112 Granite Creek 6770 16.9 10.5 161 22.8 20.4 112 Grassy Lake 7265 34.8 31.1 112 41.4 37.6 110 Gros Ventre Summit 8750 9.4 13.2 71 13.4 13.8 97 Gunsight Pass 9820 14.4 13.7 105 16.9 15.0 113 Lewis Lake Divide 7850 39.2 30.5 129 42.4 37.0 115 Phillips Bench 8200 31.5 25.4 124 34.8 29.3 119 Salt River Summit 7640 13.7 9.4 146 18.4 17.4 106 Snake River Station 6920 16.9 11.1 152 27.4 23.6 116 Spring Creek Divide 9000 24.7 23.5 105 25.5 24.9 102 Thumb Divide 7980 19.2 14.4 133 20.9 19.8 106 Togwotee Pass 9580 25.6 24.0 107 27.2 25.8 105 Two Ocean Plateau 9240 34.1 28.3 120 28.7 28.7 100 Willow Creek 8080 34.3 26.7 128 38.9 35.4 110 Younts Peak 8350 -M 15.2 * -M 16.7 * ----- ----- Basin Index (%) 118 110 MADISON-GALLATIN Black Bear 8170 43.1 36.9 117 48.3 40.0 121 Canyon 7870 14.2 12.2 116 18.1 17.1 106 Madison Plateau 7750 32.1 22.9 140 30.9 27.6 112 West Yellowstone 6700 7.8 7.0 111 18.7 15.2 123 Whiskey Creek 6800 19.0 15.4 123 23.7 21.3 111 ----- ----- Basin Index (%) 123 115 YELLOWSTONE Beartooth Lake 9360 23.6 23.5 100 22.0 20.8 106 Burnt Mtn 5880 3.9 .0 * 15.2 14.4 106 Canyon 7870 14.2 12.2 116 18.1 17.1 106 Cole Creek 7850 17.5 16.4 107 -M 14.7 * Evening Star 9200 28.0 24.7 113 31.6 28.9 109 Fisher Creek 9100 36.6 32.6 112 39.2 33.5 117 Northeast Entrance 7350 7.7 6.4 120 15.8 13.0 122 Parker Peak 9400 26.6 21.1 126 26.6 18.8 141 Sylvan Lake 8420 22.0 20.4 108 29.7 23.7 125 Thumb Divide 7980 19.2 14.4 133 20.9 19.8 106 Two Ocean Plateau 9240 34.1 28.3 120 28.7 28.7 100 White Mill 8700 26.6 23.7 112 23.2 25.0 93 Wolverine 7650 7.7 6.9 112 13.9 12.9 108 Younts Peak 8350 -M 15.2 * -M 16.7 * ----- ----- Basin Index (%) 116 111 WIND RIVER Burroughs Creek 8750 10.8 -M * 15.2 -M * Castle Creek 8400 1.2 -M * 7.1 -M * Cold Springs 9630 5.8 4.3 135 8.9 11.0 81 Deer Park 9700 17.3 16.3 106 20.3 21.7 94 Hobbs Park 10100 16.5 14.9 111 14.1 14.9 95 Kirwin 9550 11.0 10.0 110 12.3 12.5 98 Little Warm 9370 9.8 10.0 98 10.1 14.0 72 Owl Creek 8975 2.0 3.7 54 7.3 6.9 106 South Pass 9040 15.3 15.4 99 13.9 18.7 74 St. Lawrence Alt 8620 -M 5.2 * -M 10.0 * Togwotee Pass 9580 25.6 24.0 107 27.2 25.8 105 Townsend Creek 8700 10.2 9.3 110 12.9 13.4 96 ----- ----- Basin Index (%) 105 91 BIGHORN BASIN Bald Mtn. 9380 16.8 19.9 84 13.5 18.3 74 Bear Trap Meadow 8200 2.7 2.9 93 7.5 9.5 79 Bone Springs Div 9350 13.4 16.1 83 12.6 16.9 75 Grave Springs 8550 8.0 9.5 84 10.0 11.8 85 Kirwin 9550 11.0 10.0 110 12.3 12.5 98 Marquette 8760 7.3 -M * 10.2 -M * Middle Powder 7760 7.3 12.4 59 9.3 12.9 72 Owl Creek 8975 2.0 3.7 54 7.3 6.9 106 Powder River Pass 9480 9.3 10.2 91 -M 13.8 * Shell Creek 9580 13.5 15.4 88 11.5 14.9 77 Timber Creek 7950 1.2 4.6 26 7.0 8.5 82 ----- ----- Basin Index (%) 81 81 SHOSHONE RIVER Blackwater 9780 26.8 23.8 113 27.3 21.9 125 Evening Star 9200 28.0 24.7 113 31.6 28.9 109 Marquette 8760 7.3 -M * 10.2 -M * Sylvan Lake 8420 22.0 20.4 108 29.7 23.7 125 Sylvan Road 7120 6.7 9.5 71 17.5 17.7 99 Younts Peak 8350 -M 15.2 * -M 16.7 * ----- ----- Basin Index (%) 107 115 POWDER RIVER Bear Trap Meadow 8200 2.7 2.9 93 7.5 9.5 79 Cloud Peak Reservoir 9860 12.0 15.9 75 11.9 15.0 79 Grave Springs 8550 8.0 9.5 84 10.0 11.8 85 Hansen Sawmill 8360 5.0 4.6 109 8.5 9.7 88 Middle Powder 7760 7.3 12.4 59 9.3 12.9 72 Powder River Pass 9480 9.3 10.2 91 -M 13.8 * Soldier Park 8720 2.4 -M * 7.7 -M * ----- ----- Basin Index (%) 80 80 TONGUE RIVER Big Goose 7990 7.8 9.2 85 10.7 12.8 84 Bone Springs Div 9350 13.4 16.1 83 12.6 16.9 75 Burgess Junction 7880 8.4 12.6 67 9.1 13.6 67 Dome Lake 8880 6.9 11.8 58 9.2 15.0 61 Little Goose 8870 8.7 -M * 8.4 -M * Sucker Creek 8880 10.1 12.7 80 10.5 15.9 66 Tie Creek 6870 2.3 4.2 55 11.3 13.0 87 ----- ----- Basin Index (%) 73 73 BELLE FOURCHE Blind Park 6890 -M 4.0 * 8.1 13.2 61 Cole Canyon 5910 2.6 1.8 144 12.9 10.5 123 ----- ----- Basin Index (%) 144 89 CHEYENNE RIVER BASIN Blind Park 6890 -M 4.0 * 8.1 13.2 61 North Rapid Creek 6130 1.3 4.0 32 -M 11.2 * ----- ----- Basin Index (%) 32 61 UPPER N. PLATTE Arapaho Ridge 10960 26.6 21.3 125 27.2 24.4 111 Blackhall Mtn 9820 34.4 -M * 35.4 -M * Columbine 9160 24.7 20.6 120 30.1 27.0 111 Divide Peak 8880 20.2 18.6 109 24.8 22.9 108 Joe Wright 10120 22.6 22.4 101 31.2 27.9 112 Laprele Creek 8375 10.7 7.8 137 15.4 13.8 112 Med Bow 10500 40.7 -M * 36.4 -M * Never Summer 10280 22.6 20.7 109 20.0 -M * North French Creek 10130 30.8 32.0 96 31.6 28.7 110 Old Battle 10000 38.2 32.9 116 38.6 37.2 104 Rawah 9020 10.1 8.3 122 18.2 15.6 117 Sage Creek Basin 7850 14.7 5.4 272 17.0 15.3 111 Sand Lake 10050 -M 30.6 * -M 27.0 * South Brush Creek 8440 6.8 9.7 70 12.9 16.5 78 Tower 10500 51.0 48.2 106 48.9 42.3 116 Webber Springs 9250 25.9 21.8 119 32.8 28.5 115 Whiskey Park 8950 30.5 25.8 118 34.0 29.7 114 Willow Creek Pass 9540 16.9 13.3 127 18.4 14.5 127 Zirkel 9340 32.1 22.6 142 39.6 29.8 133 ----- ----- Basin Index (%) 116 112 SWEETWATER Deer Park 9700 17.3 16.3 106 20.3 21.7 94 Larsen Creek 9000 8.4 10.2 82 15.4 -M * South Pass 9040 15.3 15.4 99 13.9 18.7 74 ----- ----- Basin Index (%) 98 85 LOWER N. PLATTE Casper Mtn. 7900 14.1 14.4 98 13.6 16.7 81 Laprele Creek 8375 10.7 7.8 137 15.4 13.8 112 Reno Hill 8400 16.5 14.0 118 18.9 17.3 109 Windy Peak 7900 7.9 6.5 122 12.6 11.7 108 ----- ----- Basin Index (%) 115 102 LARAMIE RIVER Brooklyn Lake 10240 24.6 22.3 110 27.2 22.9 119 Cinnabar Park 9574 19.7 20.0 98 24.6 25.4 97 Crow Creek 8330 2.2 .3 733* 11.5 12.0 96 Deadman Hill 10220 22.8 17.2 133 21.1 19.0 111 Rawah 9020 10.1 8.3 122 18.2 15.6 117 Roach 9700 16.4 16.6 99 22.9 20.7 111 Windy Peak 7900 7.9 6.5 122 12.6 11.7 108 ----- ----- Basin Index (%) 114 108 S. PLATTE Black Mountain 8920 11.4 -M * 14.4 -M * Crow Creek 8330 2.2 .3 733* 11.5 12.0 96 Deadman Hill 10220 22.8 17.2 133 21.1 19.0 111 ----- ----- Basin Index (%) 143* 105 LITTLE SNAKE RIVER Battle Mountain 7440 6.1 3.9 156 17.1 16.1 106 Divide Peak 8880 20.2 18.6 109 24.8 22.9 108 Elk River 8700 16.1 15.2 106 20.7 21.4 97 Little Snake River 8915 27.2 24.1 113 39.3 31.2 126 Old Battle 10000 38.2 32.9 116 38.6 37.2 104 Sage Creek Basin 7850 14.7 5.4 272 17.0 15.3 111 Sandstone RS 8150 11.1 10.0 111 19.2 19.6 98 Whiskey Park 8950 30.5 25.8 118 34.0 29.7 114 ----- ----- Basin Index (%) 121 109 UPPER GREEN RIVER Big Sandy Opening 9080 13.6 12.6 108 15.6 14.2 110 Blind Bull Sum 8650 25.8 24.1 107 20.7 20.3 102 East Rim Divide 7930 8.3 9.4 88 13.0 12.3 106 Elkhart Park G.S. 9400 13.6 11.9 114 14.9 14.1 106 Gros Ventre Summit 8750 9.4 13.2 71 13.4 13.8 97 Gunsight Pass 9820 14.4 13.7 105 16.9 15.0 113 Indian Creek 9425 24.3 23.4 104 19.8 23.7 84 Kendall R.S. 7740 8.6 8.1 106 12.5 14.8 84 Loomis Park 8240 14.8 12.8 116 18.3 18.0 102 New Fork Lake 8340 9.0 8.6 105 10.5 11.3 93 Pocket Creek 9360 15.4 -M * 16.3 -M * Snider Basin 8060 8.6 10.6 81 14.3 14.8 97 Spring Creek Divide 9000 24.7 23.5 105 25.5 24.9 102 Triple Peak 8500 24.0 19.2 125 27.6 26.5 104 ----- ----- Basin Index (%) 104 100 LOWER GREEN RIVER Blacks Fork Jct 8869 8.6 -M * 14.6 -M * Buck Pasture 9632 16.6 -M * 21.7 -M * EF Blacks Fork GS 9360 11.9 -M * 13.3 -M * Hams Fork 7840 7.0 6.4 109 12.2 12.1 101 Hewinta 9500 11.8 7.9 149 16.8 15.0 112 Hickerson Park 9122 8.8 5.3 166 13.1 11.1 118 Hole-in-Rock 9168 6.0 5.7 105 12.2 10.6 115 Indian Creek 9425 24.3 23.4 104 19.8 23.7 84 Kelley R.S. 8180 14.8 12.4 119 17.4 19.0 92 Spirit Lk 10235 17.0 -M * 18.9 -M * Steel Creek Park 10158 16.4 16.2 101 21.0 17.8 118 ----- ----- Basin Index (%) 115 103 UPPER BEAR RIVER Bear River RS 8777 8.9 -M * 17.0 -M * Bug Lake 7987 23.6 16.9 140 25.6 20.5 125 Burts Miller Ranch 8000 3.0 -M * 10.0 -M * Chalk Creek #1 9171 28.3 24.5 116 32.5 26.9 121 Hayden Fork 9130 14.7 11.4 129 25.5 22.5 113 Kelley R.S. 8180 14.8 12.4 119 17.4 19.0 92 Lily Lake 9133 13.9 10.4 134 18.2 18.4 99 Monte Cristo 8932 36.9 27.4 135 34.8 27.5 127 Salt River Summit 7640 13.7 9.4 146 18.4 17.4 106 Spring Creek Divide 9000 24.7 23.5 105 25.5 24.9 102 ----- ----- Basin Index (%) 126 112 ----------------------------------------------------------------------------- -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.