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 THURSDAY: APRIL 25 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 15.7 10.8 145 24.1 22.1 109 Black Bear 8170 -M 36.9 * 48.6 40.7 119 Blind Bull Sum 8650 25.0 24.3 103 20.9 20.7 101 Cottonwood Creek 7670 21.0 17.3 121 29.1 26.5 110 East Rim Divide 7930 5.7 9.0 63 13.2 12.4 106 Grand Targhee 9260 47.3 43.1 110 37.1 33.5 111 Granite Creek 6770 15.1 9.5 159 23.0 20.6 112 Grassy Lake 7265 34.4 30.2 114 41.7 38.2 109 Gros Ventre Summit 8750 8.1 12.5 65 13.5 14.0 96 Gunsight Pass 9820 15.0 13.5 111 17.5 15.4 114 Lewis Lake Divide 7850 37.3 30.7 121 42.7 37.5 114 Phillips Bench 8200 31.0 25.4 122 35.5 29.8 119 Salt River Summit 7640 11.4 8.5 134 18.5 17.8 104 Snake River Station 6920 14.4 10.1 143 27.9 24.0 116 Spring Creek Divide 9000 24.6 23.7 104 26.0 25.4 102 Thumb Divide 7980 17.1 14.2 120 21.0 20.2 104 Togwotee Pass 9580 25.6 24.4 105 27.5 26.3 105 Two Ocean Plateau 9240 33.7 29.0 116 28.8 29.2 99 Willow Creek 8080 32.1 25.7 125 39.1 36.3 108 Younts Peak 8350 -M 15.1 * -M 17.0 * ----- ----- Basin Index (%) 115 109 MADISON-GALLATIN Black Bear 8170 -M 36.9 * 48.6 40.7 119 Canyon 7870 13.5 11.7 115 18.1 17.4 104 Madison Plateau 7750 30.6 22.6 135 31.1 28.0 111 West Yellowstone 6700 5.5 5.1 108 18.8 15.4 122 Whiskey Creek 6800 17.4 15.5 112 23.7 21.7 109 ----- ----- Basin Index (%) 122 114 YELLOWSTONE Beartooth Lake 9360 23.8 23.6 101 22.2 21.2 105 Burnt Mtn 5880 2.8 .0 * 16.2 14.9 109 Canyon 7870 13.5 11.7 115 18.1 17.4 104 Cole Creek 7850 18.0 16.3 110 -M 15.2 * Evening Star 9200 28.1 24.5 115 32.5 29.4 111 Fisher Creek 9100 36.2 33.2 109 39.4 34.1 116 Northeast Entrance 7350 5.5 5.1 108 16.1 13.3 121 Parker Peak 9400 26.6 21.8 122 26.9 19.3 139 Sylvan Lake 8420 21.6 20.3 106 30.2 24.2 125 Thumb Divide 7980 17.1 14.2 120 21.0 20.2 104 Two Ocean Plateau 9240 33.7 29.0 116 28.8 29.2 99 White Mill 8700 27.0 23.8 113 23.2 25.4 91 Wolverine 7650 5.8 5.6 104 14.1 13.2 107 Younts Peak 8350 -M 15.1 * -M 17.0 * ----- ----- Basin Index (%) 113 110 WIND RIVER Burroughs Creek 8750 10.3 -M * 15.4 -M * Castle Creek 8400 .0 -M * 7.6 -M * Cold Springs 9630 5.6 3.1 181 9.4 11.6 81 Deer Park 9700 16.6 16.3 102 20.7 22.7 91 Hobbs Park 10100 17.0 15.6 109 15.0 15.7 96 Kirwin 9550 10.7 10.1 106 12.4 13.0 95 Little Warm 9370 9.7 9.5 102 10.4 14.5 72 Owl Creek 8975 2.3 2.7 85 8.1 7.3 111 South Pass 9040 14.9 15.2 98 14.2 19.4 73 St. Lawrence Alt 8620 -M 4.9 * -M 10.6 * Togwotee Pass 9580 25.6 24.4 105 27.5 26.3 105 Townsend Creek 8700 10.1 8.8 115 13.3 14.1 94 ----- ----- Basin Index (%) 106 91 BIGHORN BASIN Bald Mtn. 9380 17.0 20.4 83 13.6 18.7 73 Bear Trap Meadow 8200 .6 2.0 30 7.4 9.9 75 Bone Springs Div 9350 13.7 16.4 84 12.8 17.3 74 Grave Springs 8550 8.0 9.2 87 10.4 12.2 85 Kirwin 9550 10.7 10.1 106 12.4 13.0 95 Marquette 8760 7.3 -M * 10.6 -M * Middle Powder 7760 6.6 12.3 54 10.0 13.3 75 Owl Creek 8975 2.3 2.7 85 8.1 7.3 111 Powder River Pass 9480 8.9 10.2 87 -M 14.2 * Shell Creek 9580 14.0 15.8 89 11.5 15.3 75 Timber Creek 7950 .7 3.7 19 7.7 9.0 86 ----- ----- Basin Index (%) 80 81 SHOSHONE RIVER Blackwater 9780 27.2 24.4 111 27.8 22.5 124 Evening Star 9200 28.1 24.5 115 32.5 29.4 111 Marquette 8760 7.3 -M * 10.6 -M * Sylvan Lake 8420 21.6 20.3 106 30.2 24.2 125 Sylvan Road 7120 4.7 8.3 57 17.7 17.9 99 Younts Peak 8350 -M 15.1 * -M 17.0 * ----- ----- Basin Index (%) 105 115 POWDER RIVER Bear Trap Meadow 8200 .6 2.0 30 7.4 9.9 75 Cloud Peak Reservoir 9860 12.4 16.3 76 11.9 15.6 76 Grave Springs 8550 8.0 9.2 87 10.4 12.2 85 Hansen Sawmill 8360 4.4 4.3 102 8.9 10.1 88 Middle Powder 7760 6.6 12.3 54 10.0 13.3 75 Powder River Pass 9480 8.9 10.2 87 -M 14.2 * Soldier Park 8720 1.4 -M * 7.9 -M * ----- ----- Basin Index (%) 75 80 TONGUE RIVER Big Goose 7990 7.3 9.1 80 11.1 13.4 83 Bone Springs Div 9350 13.7 16.4 84 12.8 17.3 74 Burgess Junction 7880 7.8 12.4 63 9.1 13.9 65 Dome Lake 8880 6.8 11.8 58 9.6 15.4 62 Little Goose 8870 8.7 -M * 8.9 -M * Sucker Creek 8880 9.9 12.7 78 -M 16.4 * Tie Creek 6870 1.3 3.5 37 11.7 13.6 86 ----- ----- Basin Index (%) 71 74 BELLE FOURCHE Blind Park 6890 -M 3.6 * 8.4 13.6 62 Cole Canyon 5910 .0 .8 0 13.3 10.9 122 ----- ----- Basin Index (%) 0 89 CHEYENNE RIVER BASIN Blind Park 6890 -M 3.6 * 8.4 13.6 62 North Rapid Creek 6130 -M 3.5 * -M 11.6 * ----- ----- Basin Index (%) * 62 UPPER N. PLATTE Arapaho Ridge 10960 25.2 21.8 116 27.5 25.4 108 Blackhall Mtn 9820 32.8 -M * 35.4 -M * Columbine 9160 21.3 20.6 103 30.2 27.7 109 Divide Peak 8880 16.4 18.1 91 24.8 23.5 106 Joe Wright 10120 21.3 23.2 92 31.6 28.8 110 Laprele Creek 8375 8.8 7.3 121 15.5 14.3 108 Med Bow 10500 41.1 -M * 37.7 -M * Never Summer 10280 23.1 21.1 109 20.4 -M * North French Creek 10130 30.7 32.6 94 32.4 29.5 110 Old Battle 10000 38.0 34.1 111 38.5 37.9 102 Rawah 9020 8.0 8.0 100 18.4 16.6 111 Sage Creek Basin 7850 11.0 2.7 407 17.4 15.6 112 Sand Lake 10050 -M 31.0 * -M 27.9 * South Brush Creek 8440 4.0 10.0 40 13.2 17.0 78 Tower 10500 49.8 49.3 101 49.0 43.3 113 Webber Springs 9250 24.0 21.9 110 32.7 29.0 113 Whiskey Park 8950 27.8 25.6 109 34.0 30.4 112 Willow Creek Pass 9540 16.6 13.7 121 18.5 15.1 123 Zirkel 9340 28.6 22.3 128 39.6 30.3 131 ----- ----- Basin Index (%) 107 110 SWEETWATER Deer Park 9700 16.6 16.3 102 20.7 22.7 91 Larsen Creek 9000 6.4 9.8 65 15.7 -M * South Pass 9040 14.9 15.2 98 14.2 19.4 73 ----- ----- Basin Index (%) 92 83 LOWER N. PLATTE Casper Mtn. 7900 12.6 14.2 89 13.9 17.1 81 Laprele Creek 8375 8.8 7.3 121 15.5 14.3 108 Reno Hill 8400 15.5 13.8 112 19.1 17.9 107 Windy Peak 7900 6.4 6.1 105 12.7 12.3 103 ----- ----- Basin Index (%) 105 99 LARAMIE RIVER Brooklyn Lake 10240 24.6 22.8 108 28.2 23.7 119 Cinnabar Park 9574 19.9 20.0 100 25.5 26.1 98 Crow Creek 8330 .0 .0 * 11.9 12.8 93 Deadman Hill 10220 21.5 18.1 119 21.4 19.8 108 Rawah 9020 8.0 8.0 100 18.4 16.6 111 Roach 9700 15.6 16.8 93 23.0 21.4 107 Windy Peak 7900 6.4 6.1 105 12.7 12.3 103 ----- ----- Basin Index (%) 105 106 S. PLATTE Black Mountain 8920 10.7 -M * 15.2 -M * Crow Creek 8330 .0 .0 * 11.9 12.8 93 Deadman Hill 10220 21.5 18.1 119 21.4 19.8 108 ----- ----- Basin Index (%) 119* 102 LITTLE SNAKE RIVER Battle Mountain 7440 3.4 1.9 179 17.1 16.5 104 Divide Peak 8880 16.4 18.1 91 24.8 23.5 106 Elk River 8700 13.4 14.6 92 20.8 21.9 95 Little Snake River 8915 25.3 23.3 109 39.4 31.7 124 Old Battle 10000 38.0 34.1 111 38.5 37.9 102 Sage Creek Basin 7850 11.0 2.7 407 17.4 15.6 112 Sandstone RS 8150 8.5 8.6 99 19.2 20.1 96 Whiskey Park 8950 27.8 25.6 109 34.0 30.4 112 ----- ----- Basin Index (%) 112 107 UPPER GREEN RIVER Big Sandy Opening 9080 14.4 12.1 119 16.3 14.6 112 Blind Bull Sum 8650 25.0 24.3 103 20.9 20.7 101 East Rim Divide 7930 5.7 9.0 63 13.2 12.4 106 Elkhart Park G.S. 9400 13.8 11.8 117 15.6 14.4 108 Gros Ventre Summit 8750 8.1 12.5 65 13.5 14.0 96 Gunsight Pass 9820 15.0 13.5 111 17.5 15.4 114 Indian Creek 9425 23.4 23.7 99 20.2 24.2 83 Kendall R.S. 7740 6.7 6.6 102 12.7 15.0 85 Loomis Park 8240 13.6 11.9 114 18.7 18.3 102 New Fork Lake 8340 7.5 7.4 101 10.8 11.6 93 Pocket Creek 9360 14.9 -M * 16.7 -M * Snider Basin 8060 6.5 10.1 64 14.6 15.1 97 Spring Creek Divide 9000 24.6 23.7 104 26.0 25.4 102 Triple Peak 8500 22.4 19.0 118 28.2 27.0 104 ----- ----- Basin Index (%) 101 100 LOWER GREEN RIVER Blacks Fork Jct 8869 7.2 -M * 14.9 -M * Buck Pasture 9632 15.8 -M * 22.2 -M * EF Blacks Fork GS 9360 10.4 -M * 13.6 -M * Hams Fork 7840 5.3 5.0 106 13.4 12.5 107 Hewinta 9500 9.8 6.9 142 17.0 15.5 110 Hickerson Park 9122 7.1 5.0 142 13.5 11.5 117 Hole-in-Rock 9168 4.9 5.0 98 12.8 11.0 116 Indian Creek 9425 23.4 23.7 99 20.2 24.2 83 Kelley R.S. 8180 13.3 11.9 112 17.9 19.5 92 Spirit Lk 10235 16.2 -M * 19.1 -M * Steel Creek Park 10158 17.2 16.5 104 21.6 18.4 117 ----- ----- Basin Index (%) 109 103 UPPER BEAR RIVER Bear River RS 8777 7.0 -M * 17.1 -M * Bug Lake 7987 21.7 16.2 134 26.5 20.9 127 Burts Miller Ranch 8000 .0 -M * 10.0 -M * Chalk Creek #1 9171 26.7 24.6 109 32.5 27.5 118 Hayden Fork 9130 13.0 10.7 121 25.6 22.9 112 Kelley R.S. 8180 13.3 11.9 112 17.9 19.5 92 Lily Lake 9133 13.3 9.9 134 18.4 18.8 98 Monte Cristo 8932 36.4 27.4 133 35.4 28.2 126 Salt River Summit 7640 11.4 8.5 134 18.5 17.8 104 Spring Creek Divide 9000 24.6 23.7 104 26.0 25.4 102 ----- ----- Basin Index (%) 121 111 ----------------------------------------------------------------------------- -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.