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 TUESDAY: MAY 14 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 5.5 2.0 275 24.6 24.0 102 Black Bear 8170 41.6 36.3 115 49.7 43.7 114 Blind Bull Sum 8650 24.8 22.1 112 22.0 22.7 97 Cottonwood Creek 7670 12.5 10.9 115 30.5 29.4 104 East Rim Divide 7930 .0 4.5 0 14.6 13.8 106 Grand Targhee 9260 46.5 45.5 102 38.5 36.6 105 Granite Creek 6770 5.6 2.4 233 23.8 22.5 106 Grassy Lake 7265 -M 23.1 * -M 41.1 * Gros Ventre Summit 8750 3.2 9.0 36 14.9 15.7 95 Gunsight Pass 9820 13.7 12.4 110 19.2 17.4 110 Lewis Lake Divide 7850 27.0 27.1 100 43.5 40.2 108 Phillips Bench 8200 22.6 22.3 101 36.2 32.3 112 Salt River Summit 7640 2.7 2.1 129 19.3 19.4 99 Snake River Station 6920 .4 .0 * 28.6 25.9 110 Spring Creek Divide 9000 22.3 22.8 98 27.5 27.6 100 Thumb Divide 7980 9.2 5.9 156 22.4 22.2 101 Togwotee Pass 9580 24.4 24.8 98 29.2 29.1 100 Two Ocean Plateau 9240 30.6 29.3 104 30.0 32.1 93 Willow Creek 8080 21.7 19.7 110 41.2 40.1 103 Younts Peak 8350 -M 14.2 * -M 19.0 * ----- ----- Basin Index (%) 105 104 MADISON-GALLATIN Black Bear 8170 41.6 36.3 115 49.7 43.7 114 Canyon 7870 7.9 5.8 136 19.0 19.3 98 Madison Plateau 7750 23.6 17.8 133 32.3 30.5 106 West Yellowstone 6700 .0 .0 * 19.8 17.0 116 Whiskey Creek 6800 12.0 9.1 132 24.8 23.5 106 ----- ----- Basin Index (%) 123 109 YELLOWSTONE Beartooth Lake 9360 24.9 22.7 110 24.6 23.6 104 Burnt Mtn 5880 .0 .0 * 20.2 18.7 108 Canyon 7870 7.9 5.8 136 19.0 19.3 98 Cole Creek 7850 19.9 17.2 116 -M 18.9 * Evening Star 9200 27.8 25.4 109 35.2 32.4 109 Fisher Creek 9100 35.8 34.3 104 41.6 37.3 112 Northeast Entrance 7350 .1 .2 50* 17.3 15.0 115 Parker Peak 9400 27.1 21.9 124 29.2 21.7 135 Sylvan Lake 8420 16.8 17.3 97 31.7 26.8 118 Thumb Divide 7980 9.2 5.9 156 22.4 22.2 101 Two Ocean Plateau 9240 30.6 29.3 104 30.0 32.1 93 White Mill 8700 25.6 24.6 104 24.8 28.1 88 Wolverine 7650 .0 .0 * 16.0 15.0 107 Younts Peak 8350 -M 14.2 * -M 19.0 * ----- ----- Basin Index (%) 110 107 WIND RIVER Burroughs Creek 8750 5.2 -M * 16.9 -M * Castle Creek 8400 .0 -M * 9.1 -M * Cold Springs 9630 1.6 .5 320* 12.3 14.0 88 Deer Park 9700 14.5 13.9 104 23.4 25.5 92 Hobbs Park 10100 18.3 15.3 120 18.2 18.6 98 Kirwin 9550 8.4 10.5 80 14.6 15.3 95 Little Warm 9370 5.6 6.4 88 11.0 16.8 65 Owl Creek 8975 .0 .0 * 9.9 9.1 109 South Pass 9040 11.8 10.5 112 17.0 22.0 77 St. Lawrence Alt 8620 -M .2 * -M 13.1 * Togwotee Pass 9580 24.4 24.8 98 29.2 29.1 100 Townsend Creek 8700 8.7 1.8 483 16.9 16.5 102 ----- ----- Basin Index (%) 111 91 BIGHORN BASIN Bald Mtn. 9380 20.5 20.8 99 17.5 21.6 81 Bear Trap Meadow 8200 .0 .0 * 9.5 12.1 79 Bone Springs Div 9350 16.2 16.2 100 16.1 20.2 80 Grave Springs 8550 5.6 6.8 82 11.8 14.7 80 Kirwin 9550 8.4 10.5 80 14.6 15.3 95 Marquette 8760 6.7 -M * 13.1 -M * Middle Powder 7760 3.2 9.4 34 11.5 15.8 73 Owl Creek 8975 .0 .0 * 9.9 9.1 109 Powder River Pass 9480 5.3 8.5 62 -M 16.7 * Shell Creek 9580 16.1 16.7 96 13.9 18.1 77 Timber Creek 7950 .1 .2 50* 10.1 11.7 86 ----- ----- Basin Index (%) 85 83 SHOSHONE RIVER Blackwater 9780 28.8 24.6 117 30.4 25.2 121 Evening Star 9200 27.8 25.4 109 35.2 32.4 109 Marquette 8760 6.7 -M * 13.1 -M * Sylvan Lake 8420 16.8 17.3 97 31.7 26.8 118 Sylvan Road 7120 .0 .1 0* 19.2 19.7 97 Younts Peak 8350 -M 14.2 * -M 19.0 * ----- ----- Basin Index (%) 109 112 POWDER RIVER Bear Trap Meadow 8200 .0 .0 * 9.5 12.1 79 Cloud Peak Reservoir 9860 13.9 16.4 85 15.2 18.8 81 Grave Springs 8550 5.6 6.8 82 11.8 14.7 80 Hansen Sawmill 8360 .4 .0 * 10.7 12.4 86 Middle Powder 7760 3.2 9.4 34 11.5 15.8 73 Powder River Pass 9480 5.3 8.5 62 -M 16.7 * Soldier Park 8720 .0 -M * 9.9 -M * ----- ----- Basin Index (%) 69 80 TONGUE RIVER Big Goose 7990 8.6 9.2 93 15.1 16.6 91 Bone Springs Div 9350 16.2 16.2 100 16.1 20.2 80 Burgess Junction 7880 8.7 10.9 80 12.4 16.5 75 Dome Lake 8880 8.3 10.3 81 13.8 18.5 75 Little Goose 8870 10.9 -M * 11.5 -M * Sucker Creek 8880 11.7 11.8 99 15.4 19.6 79 Tie Creek 6870 .8 .5 160* 15.9 16.7 95 ----- ----- Basin Index (%) 92 82 BELLE FOURCHE Blind Park 6890 .0 .0 * 10.1 16.1 63 Cole Canyon 5910 .0 .0 * 15.9 14.3 111 ----- ----- Basin Index (%) * 86 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 10.1 16.1 63 North Rapid Creek 6130 -M .0 * -M 14.1 * ----- ----- Basin Index (%) * 63 UPPER N. PLATTE Arapaho Ridge 10960 24.7 21.9 113 30.9 28.1 110 Blackhall Mtn 9820 32.3 -M * 39.0 -M * Columbine 9160 11.8 9.4 126 33.1 30.1 110 Divide Peak 8880 11.0 11.3 97 28.3 25.9 109 Joe Wright 10120 21.8 23.0 95 35.0 32.0 109 Laprele Creek 8375 1.0 .0 * 17.4 16.4 106 Med Bow 10500 41.9 -M * 41.3 -M * Never Summer 10280 24.5 22.2 110 23.0 -M * North French Creek 10130 30.9 32.2 96 35.4 33.0 107 Old Battle 10000 40.1 35.8 112 43.0 41.5 104 Rawah 9020 2.1 1.5 140 20.5 18.7 110 Sage Creek Basin 7850 .6 .0 * 19.3 17.1 113 Sand Lake 10050 32.2 30.9 104 30.1 31.1 97 South Brush Creek 8440 .0 2.1 0 15.5 19.5 79 Tower 10500 55.9 50.3 111 53.3 47.1 113 Webber Springs 9250 20.9 17.1 122 36.5 31.6 116 Whiskey Park 8950 25.6 25.1 102 38.1 33.4 114 Willow Creek Pass 9540 16.5 11.8 140 21.1 16.9 125 Zirkel 9340 21.8 17.6 124 43.3 33.1 131 ----- ----- Basin Index (%) 109 110 SWEETWATER Deer Park 9700 14.5 13.9 104 23.4 25.5 92 Larsen Creek 9000 .1 5.3 2 16.8 -M * South Pass 9040 11.8 10.5 112 17.0 22.0 77 ----- ----- Basin Index (%) 89 85 LOWER N. PLATTE Casper Mtn. 7900 8.9 9.8 91 16.5 19.9 83 Laprele Creek 8375 1.0 .0 * 17.4 16.4 106 Reno Hill 8400 12.6 8.4 150 21.9 20.7 106 Windy Peak 7900 .5 .0 * 14.4 14.2 101 ----- ----- Basin Index (%) 126 99 LARAMIE RIVER Brooklyn Lake 10240 21.3 20.2 105 31.3 26.5 118 Cinnabar Park 9574 17.2 15.8 109 28.3 29.1 97 Crow Creek 8330 .0 .0 * 13.7 14.8 93 Deadman Hill 10220 21.2 18.4 115 24.3 22.3 109 Rawah 9020 2.1 1.5 140 20.5 18.7 110 Roach 9700 13.4 14.2 94 26.9 23.9 113 Windy Peak 7900 .5 .0 * 14.4 14.2 101 ----- ----- Basin Index (%) 108 107 S. PLATTE Black Mountain 8920 4.5 -M * 17.9 -M * Crow Creek 8330 .0 .0 * 13.7 14.8 93 Deadman Hill 10220 21.2 18.4 115 24.3 22.3 109 ----- ----- Basin Index (%) 115* 102 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 20.1 18.3 110 Divide Peak 8880 11.0 11.3 97 28.3 25.9 109 Elk River 8700 6.7 4.2 160 23.4 24.1 97 Little Snake River 8915 21.5 18.7 115 43.5 34.9 125 Old Battle 10000 40.1 35.8 112 43.0 41.5 104 Sage Creek Basin 7850 .6 .0 * 19.3 17.1 113 Sandstone RS 8150 .0 .0 * 22.0 22.2 99 Whiskey Park 8950 25.6 25.1 102 38.1 33.4 114 ----- ----- Basin Index (%) 111 109 UPPER GREEN RIVER Big Sandy Opening 9080 10.4 8.1 128 18.0 16.5 109 Blind Bull Sum 8650 24.8 22.1 112 22.0 22.7 97 East Rim Divide 7930 .0 4.5 0 14.6 13.8 106 Elkhart Park G.S. 9400 11.6 8.9 130 17.2 16.3 106 Gros Ventre Summit 8750 3.2 9.0 36 14.9 15.7 95 Gunsight Pass 9820 13.7 12.4 110 19.2 17.4 110 Indian Creek 9425 19.3 21.3 91 22.0 26.6 83 Kendall R.S. 7740 .1 .0 * 14.5 16.4 88 Loomis Park 8240 7.4 6.2 119 20.2 20.2 100 New Fork Lake 8340 1.1 1.4 79 13.3 13.2 101 Pocket Creek 9360 12.5 -M * 18.0 -M * Snider Basin 8060 .0 5.6 0 15.8 16.5 96 Spring Creek Divide 9000 22.3 22.8 98 27.5 27.6 100 Triple Peak 8500 15.3 13.3 115 30.0 29.7 101 ----- ----- Basin Index (%) 95 99 LOWER GREEN RIVER Blacks Fork Jct 8869 .2 -M * 16.1 -M * Buck Pasture 9632 11.9 -M * 24.6 -M * EF Blacks Fork GS 9360 2.4 -M * 15.4 -M * Hams Fork 7840 .0 .0 * 15.2 14.1 108 Hewinta 9500 2.1 .2 1050* 18.6 17.4 107 Hickerson Park 9122 .6 .0 * 14.9 13.1 114 Hole-in-Rock 9168 .0 .0 * 14.3 12.7 113 Indian Creek 9425 19.3 21.3 91 22.0 26.6 83 Kelley R.S. 8180 5.9 7.0 84 19.2 21.4 90 Spirit Lk 10235 13.8 -M * 20.8 -M * Steel Creek Park 10158 16.5 16.9 98 23.3 20.6 113 ----- ----- Basin Index (%) 98* 101 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 18.6 -M * Bug Lake 7987 13.5 10.9 124 28.1 23.0 122 Burts Miller Ranch 8000 -M -M * 10.8 -M * Chalk Creek #1 9171 20.0 19.9 101 34.3 30.4 113 Hayden Fork 9130 4.0 3.8 105 27.8 25.4 109 Kelley R.S. 8180 5.9 7.0 84 19.2 21.4 90 Lily Lake 9133 5.8 2.1 276 20.1 21.0 96 Monte Cristo 8932 28.3 19.6 144 37.2 31.2 119 Salt River Summit 7640 2.7 2.1 129 19.3 19.4 99 Spring Creek Divide 9000 22.3 22.8 98 27.5 27.6 100 ----- ----- Basin Index (%) 116 107 ----------------------------------------------------------------------------- -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.