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: MAY 2 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 14.3 8.9 161 24.4 22.9 107 Black Bear 8170 43.0 37.4 115 48.9 41.8 117 Blind Bull Sum 8650 24.8 23.0 108 21.3 21.4 100 Cottonwood Creek 7670 19.1 15.0 127 29.3 27.6 106 East Rim Divide 7930 2.1 8.2 26 13.9 13.0 107 Grand Targhee 9260 48.0 45.1 106 37.4 34.8 107 Granite Creek 6770 13.0 8.1 160 23.5 21.4 110 Grassy Lake 7265 -M 28.7 * -M 39.4 * Gros Ventre Summit 8750 6.6 11.5 57 14.6 14.7 99 Gunsight Pass 9820 15.7 12.3 128 18.8 16.1 117 Lewis Lake Divide 7850 35.4 29.9 118 43.0 38.7 111 Phillips Bench 8200 28.9 25.1 115 35.8 30.7 117 Salt River Summit 7640 9.5 7.8 122 18.7 18.4 102 Snake River Station 6920 12.0 6.8 176 28.3 24.8 114 Spring Creek Divide 9000 24.5 24.3 101 26.3 26.3 100 Thumb Divide 7980 15.6 11.9 131 21.6 21.0 103 Togwotee Pass 9580 26.3 24.8 106 28.6 27.4 104 Two Ocean Plateau 9240 34.4 29.8 115 29.5 30.2 98 Willow Creek 8080 29.7 22.6 131 40.1 37.7 106 Younts Peak 8350 -M 15.6 * -M 17.7 * ----- ----- Basin Index (%) 114 107 MADISON-GALLATIN Black Bear 8170 43.0 37.4 115 48.9 41.8 117 Canyon 7870 12.7 10.0 127 18.5 18.1 102 Madison Plateau 7750 29.0 21.2 137 31.5 29.0 109 West Yellowstone 6700 2.2 1.2 183 19.2 16.0 120 Whiskey Creek 6800 16.1 14.2 113 23.9 22.4 107 ----- ----- Basin Index (%) 123 112 YELLOWSTONE Beartooth Lake 9360 24.4 22.7 107 22.9 22.0 104 Burnt Mtn 5880 3.9 .0 * 18.8 16.0 118 Canyon 7870 12.7 10.0 127 18.5 18.1 102 Cole Creek 7850 20.4 16.6 123 -M 16.5 * Evening Star 9200 29.1 24.8 117 33.7 30.5 110 Fisher Creek 9100 36.3 32.6 111 40.6 35.2 115 Northeast Entrance 7350 3.6 2.4 150 16.8 13.8 122 Parker Peak 9400 27.7 21.2 131 27.8 20.1 138 Sylvan Lake 8420 21.0 19.5 108 30.7 25.1 122 Thumb Divide 7980 15.6 11.9 131 21.6 21.0 103 Two Ocean Plateau 9240 34.4 29.8 115 29.5 30.2 98 White Mill 8700 27.6 23.8 116 24.2 26.4 92 Wolverine 7650 4.2 1.9 221 14.7 13.8 107 Younts Peak 8350 -M 15.6 * -M 17.7 * ----- ----- Basin Index (%) 120 110 WIND RIVER Burroughs Creek 8750 9.7 -M * 16.4 -M * Castle Creek 8400 .0 -M * 8.2 -M * Cold Springs 9630 5.1 1.2 425 10.9 12.5 87 Deer Park 9700 16.2 15.8 103 21.8 23.5 93 Hobbs Park 10100 17.5 16.0 109 16.0 16.8 95 Kirwin 9550 10.4 10.5 99 13.1 13.9 94 Little Warm 9370 9.4 8.6 109 10.7 15.4 69 Owl Creek 8975 .8 .8 100 9.0 8.0 112 South Pass 9040 13.7 14.7 93 15.3 20.5 75 St. Lawrence Alt 8620 -M 2.1 * -M 11.6 * Togwotee Pass 9580 26.3 24.8 106 28.6 27.4 104 Townsend Creek 8700 9.4 7.3 129 14.4 15.0 96 ----- ----- Basin Index (%) 109 91 BIGHORN BASIN Bald Mtn. 9380 17.6 20.5 86 14.1 19.8 71 Bear Trap Meadow 8200 .4 .7 57 8.0 10.7 75 Bone Springs Div 9350 14.8 16.5 90 13.7 18.3 75 Grave Springs 8550 7.5 9.5 79 10.8 13.0 83 Kirwin 9550 10.4 10.5 99 13.1 13.9 94 Marquette 8760 7.7 -M * 11.6 -M * Middle Powder 7760 6.1 11.5 53 10.7 14.2 75 Owl Creek 8975 .8 .8 100 9.0 8.0 112 Powder River Pass 9480 8.3 9.2 90 -M 15.1 * Shell Creek 9580 14.9 15.9 94 12.2 16.4 74 Timber Creek 7950 1.1 3.0 37 9.0 10.1 89 ----- ----- Basin Index (%) 83 81 SHOSHONE RIVER Blackwater 9780 28.5 25.5 112 29.1 23.6 123 Evening Star 9200 29.1 24.8 117 33.7 30.5 110 Marquette 8760 7.7 -M * 11.6 -M * Sylvan Lake 8420 21.0 19.5 108 30.7 25.1 122 Sylvan Road 7120 2.0 5.2 38 18.2 18.6 98 Younts Peak 8350 -M 15.6 * -M 17.7 * ----- ----- Basin Index (%) 107 114 POWDER RIVER Bear Trap Meadow 8200 .4 .7 57 8.0 10.7 75 Cloud Peak Reservoir 9860 13.0 16.4 79 12.9 16.7 77 Grave Springs 8550 7.5 9.5 79 10.8 13.0 83 Hansen Sawmill 8360 3.7 2.1 176 9.8 11.0 89 Middle Powder 7760 6.1 11.5 53 10.7 14.2 75 Powder River Pass 9480 8.3 9.2 90 -M 15.1 * Soldier Park 8720 1.0 -M * 8.8 -M * ----- ----- Basin Index (%) 79 80 TONGUE RIVER Big Goose 7990 7.7 9.2 84 12.3 14.2 87 Bone Springs Div 9350 14.8 16.5 90 13.7 18.3 75 Burgess Junction 7880 8.1 12.0 68 10.0 14.9 67 Dome Lake 8880 7.0 11.4 61 10.9 16.6 66 Little Goose 8870 9.9 -M * 9.7 -M * Sucker Creek 8880 10.3 12.0 86 11.8 17.5 67 Tie Creek 6870 1.2 2.6 46 13.1 14.5 90 ----- ----- Basin Index (%) 77 75 BELLE FOURCHE Blind Park 6890 .1 .3 33* 9.1 14.5 63 Cole Canyon 5910 .8 .4 200* 14.6 12.1 121 ----- ----- Basin Index (%) 129* 89 CHEYENNE RIVER BASIN Blind Park 6890 .1 .3 33* 9.1 14.5 63 North Rapid Creek 6130 .1 .7 14 -M 12.4 * ----- ----- Basin Index (%) 20 63 UPPER N. PLATTE Arapaho Ridge 10960 25.4 22.3 114 29.7 26.3 113 Blackhall Mtn 9820 33.7 -M * 38.2 -M * Columbine 9160 17.7 17.8 99 32.0 28.7 111 Divide Peak 8880 15.8 18.0 88 27.2 24.4 111 Joe Wright 10120 22.6 23.1 98 34.3 30.0 114 Laprele Creek 8375 7.2 5.8 124 16.4 15.1 109 Med Bow 10500 42.6 -M * 40.5 -M * Never Summer 10280 25.3 21.8 116 22.6 -M * North French Creek 10130 32.2 32.8 98 34.9 30.8 113 Old Battle 10000 41.0 34.7 118 41.9 39.3 107 Rawah 9020 7.9 5.6 141 20.1 17.3 116 Sage Creek Basin 7850 9.6 1.1 873* 19.1 16.2 118 Sand Lake 10050 -M 31.4 * -M 29.2 * South Brush Creek 8440 2.2 8.8 25 14.8 17.9 83 Tower 10500 54.3 50.2 108 51.8 44.9 115 Webber Springs 9250 24.4 21.5 113 35.4 30.1 118 Whiskey Park 8950 29.5 26.6 111 37.4 31.6 118 Willow Creek Pass 9540 18.1 14.3 127 20.8 15.8 132 Zirkel 9340 27.5 20.9 132 42.4 31.1 136 ----- ----- Basin Index (%) 111 115 SWEETWATER Deer Park 9700 16.2 15.8 103 21.8 23.5 93 Larsen Creek 9000 3.5 8.9 39 16.3 -M * South Pass 9040 13.7 14.7 93 15.3 20.5 75 ----- ----- Basin Index (%) 85 84 LOWER N. PLATTE Casper Mtn. 7900 11.9 13.0 92 14.8 18.1 82 Laprele Creek 8375 7.2 5.8 124 16.4 15.1 109 Reno Hill 8400 15.3 12.4 123 20.4 19.0 107 Windy Peak 7900 4.9 3.7 132 12.9 13.0 99 ----- ----- Basin Index (%) 113 99 LARAMIE RIVER Brooklyn Lake 10240 24.9 23.3 107 30.3 24.8 122 Cinnabar Park 9574 19.9 19.2 104 27.5 27.0 102 Crow Creek 8330 .8 .0 * 13.1 13.5 97 Deadman Hill 10220 22.9 19.1 120 23.4 20.8 112 Rawah 9020 7.9 5.6 141 20.1 17.3 116 Roach 9700 16.2 17.1 95 25.6 22.4 114 Windy Peak 7900 4.9 3.7 132 12.9 13.0 99 ----- ----- Basin Index (%) 111 110 S. PLATTE Black Mountain 8920 9.7 -M * 16.9 -M * Crow Creek 8330 .8 .0 * 13.1 13.5 97 Deadman Hill 10220 22.9 19.1 120 23.4 20.8 112 ----- ----- Basin Index (%) 124* 106 LITTLE SNAKE RIVER Battle Mountain 7440 2.0 .0 * 20.0 17.2 116 Divide Peak 8880 15.8 18.0 88 27.2 24.4 111 Elk River 8700 12.9 12.9 100 23.1 22.8 101 Little Snake River 8915 26.9 22.1 122 42.9 32.9 130 Old Battle 10000 41.0 34.7 118 41.9 39.3 107 Sage Creek Basin 7850 9.6 1.1 873* 19.1 16.2 118 Sandstone RS 8150 8.4 5.6 150 21.8 20.8 105 Whiskey Park 8950 29.5 26.6 111 37.4 31.6 118 ----- ----- Basin Index (%) 121 114 UPPER GREEN RIVER Big Sandy Opening 9080 13.8 10.2 135 17.3 15.2 114 Blind Bull Sum 8650 24.8 23.0 108 21.3 21.4 100 East Rim Divide 7930 2.1 8.2 26 13.9 13.0 107 Elkhart Park G.S. 9400 14.1 11.1 127 16.9 15.1 112 Gros Ventre Summit 8750 6.6 11.5 57 14.6 14.7 99 Gunsight Pass 9820 15.7 12.3 128 18.8 16.1 117 Indian Creek 9425 21.8 22.8 96 20.2 25.1 80 Kendall R.S. 7740 5.1 3.8 134 13.9 15.6 89 Loomis Park 8240 12.7 10.8 118 19.6 19.0 103 New Fork Lake 8340 6.3 6.3 100 11.7 12.2 96 Pocket Creek 9360 14.3 -M * 17.3 -M * Snider Basin 8060 3.2 9.1 35 14.7 15.7 94 Spring Creek Divide 9000 24.5 24.3 101 26.3 26.3 100 Triple Peak 8500 20.7 17.1 121 28.9 28.0 103 ----- ----- Basin Index (%) 101 100 LOWER GREEN RIVER Blacks Fork Jct 8869 4.5 -M * 15.8 -M * Buck Pasture 9632 15.0 -M * 24.0 -M * EF Blacks Fork GS 9360 8.0 -M * 14.9 -M * Hams Fork 7840 1.8 2.5 72 13.9 13.2 105 Hewinta 9500 7.2 4.6 157 17.9 16.3 110 Hickerson Park 9122 4.2 3.9 108 13.9 12.1 115 Hole-in-Rock 9168 2.1 2.2 95 13.3 11.6 115 Indian Creek 9425 21.8 22.8 96 20.2 25.1 80 Kelley R.S. 8180 11.5 11.2 103 18.1 20.2 90 Spirit Lk 10235 14.7 -M * 19.9 -M * Steel Creek Park 10158 18.0 17.2 105 22.8 19.2 119 ----- ----- Basin Index (%) 103 102 UPPER BEAR RIVER Bear River RS 8777 3.8 -M * 18.0 -M * Bug Lake 7987 20.6 14.7 140 27.1 21.8 124 Burts Miller Ranch 8000 -M -M * 10.2 -M * Chalk Creek #1 9171 24.6 24.0 102 33.6 28.6 117 Hayden Fork 9130 10.7 9.1 118 27.0 23.9 113 Kelley R.S. 8180 11.5 11.2 103 18.1 20.2 90 Lily Lake 9133 10.6 10.0 106 19.4 19.6 99 Monte Cristo 8932 33.8 26.2 129 36.1 29.3 123 Salt River Summit 7640 9.5 7.8 122 18.7 18.4 102 Spring Creek Divide 9000 24.5 24.3 101 26.3 26.3 100 ----- ----- Basin Index (%) 115 110 ----------------------------------------------------------------------------- -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.