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 9 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 9.7 5.0 194 24.5 23.6 104 Black Bear 8170 43.0 36.8 117 49.7 42.9 116 Blind Bull Sum 8650 24.3 22.5 108 21.8 22.1 99 Cottonwood Creek 7670 16.2 13.1 124 30.3 28.6 106 East Rim Divide 7930 .0 6.2 0 14.2 13.5 105 Grand Targhee 9260 49.3 46.4 106 38.3 35.9 107 Granite Creek 6770 9.4 5.9 159 23.6 22.0 107 Grassy Lake 7265 -M 26.4 * -M 40.4 * Gros Ventre Summit 8750 5.4 9.8 55 14.8 15.3 97 Gunsight Pass 9820 15.5 11.9 130 19.2 16.8 114 Lewis Lake Divide 7850 31.6 29.5 107 43.4 39.6 110 Phillips Bench 8200 25.9 23.3 111 36.2 31.7 114 Salt River Summit 7640 6.2 5.1 122 19.3 19.0 102 Snake River Station 6920 6.8 3.1 219 28.6 25.5 112 Spring Creek Divide 9000 24.0 23.8 101 27.4 27.0 101 Thumb Divide 7980 12.8 8.9 144 22.3 21.7 103 Togwotee Pass 9580 26.2 25.3 104 29.1 28.4 102 Two Ocean Plateau 9240 33.6 29.7 113 29.9 31.1 96 Willow Creek 8080 26.7 21.3 125 41.0 39.0 105 Younts Peak 8350 -M 15.5 * -M 18.4 * ----- ----- Basin Index (%) 112 106 MADISON-GALLATIN Black Bear 8170 43.0 36.8 117 49.7 42.9 116 Canyon 7870 11.1 7.7 144 18.9 18.8 101 Madison Plateau 7750 26.9 20.4 132 32.2 29.9 108 West Yellowstone 6700 .1 .0 * 19.8 16.6 119 Whiskey Creek 6800 14.4 11.1 130 24.5 23.0 107 ----- ----- Basin Index (%) 126 111 YELLOWSTONE Beartooth Lake 9360 25.7 23.0 112 24.0 23.0 104 Burnt Mtn 5880 2.7 .0 * 19.2 17.0 113 Canyon 7870 11.1 7.7 144 18.9 18.8 101 Cole Creek 7850 20.5 17.1 120 -M 17.8 * Evening Star 9200 29.2 25.3 115 35.0 31.7 110 Fisher Creek 9100 36.2 34.0 106 41.3 36.5 113 Northeast Entrance 7350 .1 1.0 10 17.2 14.5 119 Parker Peak 9400 28.5 21.8 131 28.9 21.1 137 Sylvan Lake 8420 19.6 18.1 108 31.7 26.2 121 Thumb Divide 7980 12.8 8.9 144 22.3 21.7 103 Two Ocean Plateau 9240 33.6 29.7 113 29.9 31.1 96 White Mill 8700 27.6 24.6 112 24.5 27.4 89 Wolverine 7650 1.3 .4 325* 15.8 14.5 109 Younts Peak 8350 -M 15.5 * -M 18.4 * ----- ----- Basin Index (%) 118 109 WIND RIVER Burroughs Creek 8750 7.7 -M * 16.7 -M * Castle Creek 8400 .0 -M * 8.7 -M * Cold Springs 9630 4.5 1.7 265 11.8 13.3 89 Deer Park 9700 15.7 14.5 108 22.6 24.4 93 Hobbs Park 10100 18.9 15.9 119 17.5 17.7 99 Kirwin 9550 10.2 10.9 94 14.0 14.7 95 Little Warm 9370 8.3 6.7 124 11.1 16.1 69 Owl Creek 8975 .4 .6 67 9.6 8.5 113 South Pass 9040 13.0 12.2 107 16.1 21.2 76 St. Lawrence Alt 8620 -M 1.4 * -M 12.3 * Togwotee Pass 9580 26.2 25.3 104 29.1 28.4 102 Townsend Creek 8700 9.6 4.4 218 15.9 15.7 101 ----- ----- Basin Index (%) 116 92 BIGHORN BASIN Bald Mtn. 9380 20.1 20.5 98 16.2 20.9 78 Bear Trap Meadow 8200 .0 .2 0* 8.5 11.5 74 Bone Springs Div 9350 16.3 16.5 99 15.0 19.5 77 Grave Springs 8550 6.5 7.9 82 11.2 13.9 81 Kirwin 9550 10.2 10.9 94 14.0 14.7 95 Marquette 8760 7.2 -M * 12.0 -M * Middle Powder 7760 5.3 11.0 48 10.8 15.2 71 Owl Creek 8975 .4 .6 67 9.6 8.5 113 Powder River Pass 9480 7.0 9.0 78 -M 16.1 * Shell Creek 9580 15.7 16.7 94 13.1 17.5 75 Timber Creek 7950 .7 1.7 41 9.7 10.8 90 ----- ----- Basin Index (%) 87 82 SHOSHONE RIVER Blackwater 9780 29.4 25.0 118 30.1 24.4 123 Evening Star 9200 29.2 25.3 115 35.0 31.7 110 Marquette 8760 7.2 -M * 12.0 -M * Sylvan Lake 8420 19.6 18.1 108 31.7 26.2 121 Sylvan Road 7120 .1 1.9 5 18.8 19.2 98 Younts Peak 8350 -M 15.5 * -M 18.4 * ----- ----- Basin Index (%) 111 114 POWDER RIVER Bear Trap Meadow 8200 .0 .2 0* 8.5 11.5 74 Cloud Peak Reservoir 9860 13.8 16.7 83 13.9 18.0 77 Grave Springs 8550 6.5 7.9 82 11.2 13.9 81 Hansen Sawmill 8360 2.8 1.4 200 10.4 11.8 88 Middle Powder 7760 5.3 11.0 48 10.8 15.2 71 Powder River Pass 9480 7.0 9.0 78 -M 16.1 * Soldier Park 8720 1.0 -M * 9.4 -M * ----- ----- Basin Index (%) 77 78 TONGUE RIVER Big Goose 7990 9.0 10.4 87 14.4 15.6 92 Bone Springs Div 9350 16.3 16.5 99 15.0 19.5 77 Burgess Junction 7880 8.9 11.5 77 11.5 15.9 72 Dome Lake 8880 8.6 11.2 77 13.0 17.8 73 Little Goose 8870 11.4 -M * 11.0 -M * Sucker Creek 8880 11.8 12.5 94 14.0 18.8 74 Tie Creek 6870 2.1 1.7 124 15.0 15.7 96 ----- ----- Basin Index (%) 89 80 BELLE FOURCHE Blind Park 6890 .0 .0 * 9.6 15.3 63 Cole Canyon 5910 .0 .0 * 15.3 13.4 114 ----- ----- Basin Index (%) * 87 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 9.6 15.3 63 North Rapid Creek 6130 .0 .0 * -M 13.2 * ----- ----- Basin Index (%) * 63 UPPER N. PLATTE Arapaho Ridge 10960 25.2 22.4 112 30.2 27.3 111 Blackhall Mtn 9820 33.2 -M * 38.8 -M * Columbine 9160 14.3 13.5 106 32.4 29.5 110 Divide Peak 8880 13.6 14.9 91 28.0 25.4 110 Joe Wright 10120 21.9 23.0 95 34.7 31.2 111 Laprele Creek 8375 4.0 3.4 118 17.0 16.0 106 Med Bow 10500 41.3 -M * 41.2 -M * Never Summer 10280 24.9 22.1 113 22.8 -M * North French Creek 10130 31.7 32.8 97 35.2 32.2 109 Old Battle 10000 40.5 36.6 111 42.4 40.7 104 Rawah 9020 5.0 3.0 167 20.3 18.0 113 Sage Creek Basin 7850 5.2 .0 * 19.3 16.8 115 Sand Lake 10050 32.3 31.8 102 29.6 30.3 98 South Brush Creek 8440 .2 5.8 3 15.2 18.9 80 Tower 10500 55.2 51.4 107 52.3 46.2 113 Webber Springs 9250 21.8 19.8 110 36.3 31.0 117 Whiskey Park 8950 27.4 26.9 102 37.9 32.8 116 Willow Creek Pass 9540 17.3 13.7 126 20.8 16.4 127 Zirkel 9340 23.4 19.9 118 42.8 32.2 133 ----- ----- Basin Index (%) 107 111 SWEETWATER Deer Park 9700 15.7 14.5 108 22.6 24.4 93 Larsen Creek 9000 .1 6.8 1 16.8 -M * South Pass 9040 13.0 12.2 107 16.1 21.2 76 ----- ----- Basin Index (%) 86 85 LOWER N. PLATTE Casper Mtn. 7900 10.4 11.7 89 16.2 19.3 84 Laprele Creek 8375 4.0 3.4 118 17.0 16.0 106 Reno Hill 8400 13.9 11.0 126 21.3 20.0 106 Windy Peak 7900 1.9 1.2 158 13.4 13.8 97 ----- ----- Basin Index (%) 111 98 LARAMIE RIVER Brooklyn Lake 10240 22.8 21.7 105 30.5 25.9 118 Cinnabar Park 9574 17.7 17.8 99 27.8 28.2 99 Crow Creek 8330 .1 .0 * 13.4 14.2 94 Deadman Hill 10220 21.8 18.6 117 23.7 21.6 110 Rawah 9020 5.0 3.0 167 20.3 18.0 113 Roach 9700 14.7 16.2 91 26.2 23.2 113 Windy Peak 7900 1.9 1.2 158 13.4 13.8 97 ----- ----- Basin Index (%) 107 107 S. PLATTE Black Mountain 8920 6.4 -M * 17.5 -M * Crow Creek 8330 .1 .0 * 13.4 14.2 94 Deadman Hill 10220 21.8 18.6 117 23.7 21.6 110 ----- ----- Basin Index (%) 118* 104 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 20.1 17.8 113 Divide Peak 8880 13.6 14.9 91 28.0 25.4 110 Elk River 8700 10.0 8.6 116 23.1 23.6 98 Little Snake River 8915 24.2 20.7 117 43.4 34.3 127 Old Battle 10000 40.5 36.6 111 42.4 40.7 104 Sage Creek Basin 7850 5.2 .0 * 19.3 16.8 115 Sandstone RS 8150 4.4 2.2 200 21.9 21.7 101 Whiskey Park 8950 27.4 26.9 102 37.9 32.8 116 ----- ----- Basin Index (%) 114 111 UPPER GREEN RIVER Big Sandy Opening 9080 12.6 8.6 147 18.0 16.0 112 Blind Bull Sum 8650 24.3 22.5 108 21.8 22.1 99 East Rim Divide 7930 .0 6.2 0 14.2 13.5 105 Elkhart Park G.S. 9400 13.7 9.7 141 17.1 15.8 108 Gros Ventre Summit 8750 5.4 9.8 55 14.8 15.3 97 Gunsight Pass 9820 15.5 11.9 130 19.2 16.8 114 Indian Creek 9425 21.1 21.0 100 21.7 25.9 84 Kendall R.S. 7740 2.1 .0 * 13.9 16.1 86 Loomis Park 8240 9.8 7.6 129 19.8 19.7 101 New Fork Lake 8340 4.2 3.0 140 12.3 12.7 97 Pocket Creek 9360 14.2 -M * 17.9 -M * Snider Basin 8060 .2 7.5 3 15.4 16.1 96 Spring Creek Divide 9000 24.0 23.8 101 27.4 27.0 101 Triple Peak 8500 18.2 15.1 121 29.8 29.0 103 ----- ----- Basin Index (%) 103 100 LOWER GREEN RIVER Blacks Fork Jct 8869 1.6 -M * 16.1 -M * Buck Pasture 9632 13.4 -M * 24.2 -M * EF Blacks Fork GS 9360 5.5 -M * 15.2 -M * Hams Fork 7840 .2 .2 100* 15.0 13.7 109 Hewinta 9500 5.0 2.4 208 18.4 17.0 108 Hickerson Park 9122 2.3 .5 460* 14.8 12.7 117 Hole-in-Rock 9168 .6 .3 200* 14.0 12.2 115 Indian Creek 9425 21.1 21.0 100 21.7 25.9 84 Kelley R.S. 8180 8.9 8.6 103 19.1 20.9 91 Spirit Lk 10235 13.9 -M * 20.5 -M * Steel Creek Park 10158 17.3 17.8 97 23.1 20.0 116 ----- ----- Basin Index (%) 109* 103 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 18.2 -M * Bug Lake 7987 16.8 12.4 135 27.9 22.4 125 Burts Miller Ranch 8000 -M -M * 10.5 -M * Chalk Creek #1 9171 21.9 21.9 100 33.9 29.6 115 Hayden Fork 9130 7.5 6.3 119 27.4 24.7 111 Kelley R.S. 8180 8.9 8.6 103 19.1 20.9 91 Lily Lake 9133 7.7 6.2 124 19.8 20.4 97 Monte Cristo 8932 30.8 22.0 140 36.9 30.4 121 Salt River Summit 7640 6.2 5.1 122 19.3 19.0 102 Spring Creek Divide 9000 24.0 23.8 101 27.4 27.0 101 ----- ----- Basin Index (%) 116 109 ----------------------------------------------------------------------------- -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.