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 WEDNESDAY: MAY 15 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 4.6 1.2 383* 24.6 24.0 102 Black Bear 8170 40.6 36.0 113 49.8 43.8 114 Blind Bull Sum 8650 25.7 22.0 117 22.1 22.8 97 Cottonwood Creek 7670 11.5 10.3 112 30.5 29.5 103 East Rim Divide 7930 .0 3.9 0 14.6 13.9 105 Grand Targhee 9260 45.3 45.1 100 38.5 36.6 105 Granite Creek 6770 4.7 1.2 392* 23.9 22.5 106 Grassy Lake 7265 -M 22.2 * -M 41.1 * Gros Ventre Summit 8750 2.4 8.6 28 14.9 15.7 95 Gunsight Pass 9820 13.3 12.2 109 19.2 17.4 110 Lewis Lake Divide 7850 25.9 26.2 99 43.6 40.3 108 Phillips Bench 8200 21.8 21.9 100 36.4 32.4 112 Salt River Summit 7640 1.3 1.5 87 19.3 19.5 99 Snake River Station 6920 .1 .0 * 28.6 26.0 110 Spring Creek Divide 9000 21.3 22.6 94 27.5 27.7 99 Thumb Divide 7980 8.1 5.1 159 22.4 22.3 100 Togwotee Pass 9580 23.7 24.5 97 29.2 29.1 100 Two Ocean Plateau 9240 29.7 29.2 102 30.0 32.2 93 Willow Creek 8080 20.4 19.5 105 41.2 40.1 103 Younts Peak 8350 -M 13.8 * -M 19.0 * ----- ----- Basin Index (%) 103 104 MADISON-GALLATIN Black Bear 8170 40.6 36.0 113 49.8 43.8 114 Canyon 7870 6.9 5.3 130 19.0 19.4 98 Madison Plateau 7750 22.5 17.2 131 32.3 30.6 106 West Yellowstone 6700 .0 .0 * 19.9 17.1 116 Whiskey Creek 6800 11.2 8.6 130 24.8 23.6 105 ----- ----- Basin Index (%) 121 108 YELLOWSTONE Beartooth Lake 9360 24.4 22.6 108 24.6 23.7 104 Burnt Mtn 5880 .0 .0 * 20.3 18.8 108 Canyon 7870 6.9 5.3 130 19.0 19.4 98 Cole Creek 7850 19.3 17.1 113 -M 18.9 * Evening Star 9200 27.1 25.3 107 35.2 32.6 108 Fisher Creek 9100 35.1 34.1 103 41.8 37.5 111 Northeast Entrance 7350 .1 .0 * 17.4 15.1 115 Parker Peak 9400 26.0 21.6 120 29.2 21.8 134 Sylvan Lake 8420 16.3 17.0 96 31.7 26.9 118 Thumb Divide 7980 8.1 5.1 159 22.4 22.3 100 Two Ocean Plateau 9240 29.7 29.2 102 30.0 32.2 93 White Mill 8700 25.0 24.4 102 24.9 28.3 88 Wolverine 7650 .0 .0 * 16.0 15.1 106 Younts Peak 8350 -M 13.8 * -M 19.0 * ----- ----- Basin Index (%) 108 106 WIND RIVER Burroughs Creek 8750 4.4 -M * 16.9 -M * Castle Creek 8400 .0 -M * 9.1 -M * Cold Springs 9630 .5 .2 250* 12.3 14.0 88 Deer Park 9700 14.1 13.5 104 23.4 25.5 92 Hobbs Park 10100 17.8 15.0 119 18.1 18.6 97 Kirwin 9550 7.7 10.4 74 14.6 15.4 95 Little Warm 9370 4.5 6.1 74 10.9 16.9 64 Owl Creek 8975 .0 .0 * 9.9 9.2 108 South Pass 9040 11.2 10.1 111 17.1 22.1 77 St. Lawrence Alt 8620 -M .1 * -M 13.1 * Togwotee Pass 9580 23.7 24.5 97 29.2 29.1 100 Townsend Creek 8700 8.0 1.2 667 16.9 16.6 102 ----- ----- Basin Index (%) 108 91 BIGHORN BASIN Bald Mtn. 9380 20.1 20.7 97 17.5 21.7 81 Bear Trap Meadow 8200 .0 .0 * 9.8 12.2 80 Bone Springs Div 9350 15.6 15.9 98 16.1 20.3 79 Grave Springs 8550 4.9 6.4 77 11.9 14.7 81 Kirwin 9550 7.7 10.4 74 14.6 15.4 95 Marquette 8760 5.9 -M * 13.1 -M * Middle Powder 7760 1.8 8.9 20 11.9 15.9 75 Owl Creek 8975 .0 .0 * 9.9 9.2 108 Powder River Pass 9480 4.4 8.3 53 -M 16.8 * Shell Creek 9580 15.6 16.6 94 13.9 18.1 77 Timber Creek 7950 .1 .0 * 10.1 11.7 86 ----- ----- Basin Index (%) 81 83 SHOSHONE RIVER Blackwater 9780 28.1 24.8 113 30.4 25.3 120 Evening Star 9200 27.1 25.3 107 35.2 32.6 108 Marquette 8760 5.9 -M * 13.1 -M * Sylvan Lake 8420 16.3 17.0 96 31.7 26.9 118 Sylvan Road 7120 .0 .0 * 19.2 19.8 97 Younts Peak 8350 -M 13.8 * -M 19.0 * ----- ----- Basin Index (%) 107 111 POWDER RIVER Bear Trap Meadow 8200 .0 .0 * 9.8 12.2 80 Cloud Peak Reservoir 9860 13.4 16.3 82 15.2 19.0 80 Grave Springs 8550 4.9 6.4 77 11.9 14.7 81 Hansen Sawmill 8360 .2 .0 * 10.7 12.5 86 Middle Powder 7760 1.8 8.9 20 11.9 15.9 75 Powder River Pass 9480 4.4 8.3 53 -M 16.8 * Soldier Park 8720 .0 -M * 9.9 -M * ----- ----- Basin Index (%) 62 80 TONGUE RIVER Big Goose 7990 7.8 8.8 89 15.1 16.6 91 Bone Springs Div 9350 15.6 15.9 98 16.1 20.3 79 Burgess Junction 7880 8.1 10.6 76 12.4 16.6 75 Dome Lake 8880 7.5 9.7 77 13.9 18.5 75 Little Goose 8870 10.0 -M * 11.5 -M * Sucker Creek 8880 10.9 11.3 96 15.5 19.7 79 Tie Creek 6870 .2 .2 100* 15.9 16.8 95 ----- ----- Basin Index (%) 89 82 BELLE FOURCHE Blind Park 6890 .0 .0 * 10.2 16.2 63 Cole Canyon 5910 .0 .0 * 16.4 14.4 114 ----- ----- Basin Index (%) * 87 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 10.2 16.2 63 North Rapid Creek 6130 -M .0 * -M 14.2 * ----- ----- Basin Index (%) * 63 UPPER N. PLATTE Arapaho Ridge 10960 24.2 21.6 112 30.8 28.2 109 Blackhall Mtn 9820 31.3 -M * 39.0 -M * Columbine 9160 10.7 8.5 126 33.1 30.2 110 Divide Peak 8880 9.7 10.5 92 28.3 26.0 109 Joe Wright 10120 21.3 22.8 93 34.9 32.2 108 Laprele Creek 8375 .1 .0 * 17.5 16.4 107 Med Bow 10500 41.4 -M * 41.3 -M * Never Summer 10280 24.2 22.1 110 23.0 -M * North French Creek 10130 30.0 32.1 93 35.4 33.0 107 Old Battle 10000 39.7 35.1 113 43.0 41.5 104 Rawah 9020 1.2 1.4 86 20.5 18.8 109 Sage Creek Basin 7850 -M .0 * 19.3 17.2 112 Sand Lake 10050 31.7 30.5 104 30.1 31.2 96 South Brush Creek 8440 .0 1.5 0 15.8 19.6 81 Tower 10500 56.2 49.9 113 53.3 47.2 113 Webber Springs 9250 19.7 16.4 120 36.5 31.7 115 Whiskey Park 8950 26.3 24.6 107 38.1 33.5 114 Willow Creek Pass 9540 16.0 11.4 140 21.1 17.0 124 Zirkel 9340 20.5 16.7 123 43.3 33.2 130 ----- ----- Basin Index (%) 109 110 SWEETWATER Deer Park 9700 14.1 13.5 104 23.4 25.5 92 Larsen Creek 9000 .1 5.0 2 16.9 -M * South Pass 9040 11.2 10.1 111 17.1 22.1 77 ----- ----- Basin Index (%) 89 85 LOWER N. PLATTE Casper Mtn. 7900 7.8 9.1 86 16.6 19.9 83 Laprele Creek 8375 .1 .0 * 17.5 16.4 107 Reno Hill 8400 11.7 7.8 150 22.0 20.8 106 Windy Peak 7900 .2 .0 * 14.5 14.2 102 ----- ----- Basin Index (%) 117 99 LARAMIE RIVER Brooklyn Lake 10240 20.2 19.7 103 31.3 26.6 118 Cinnabar Park 9574 16.3 15.3 107 28.3 29.2 97 Crow Creek 8330 .0 .0 * 13.8 14.9 93 Deadman Hill 10220 20.4 18.3 111 24.4 22.4 109 Rawah 9020 1.2 1.4 86 20.5 18.8 109 Roach 9700 12.5 13.9 90 26.8 24.0 112 Windy Peak 7900 .2 .0 * 14.5 14.2 102 ----- ----- Basin Index (%) 103 106 S. PLATTE Black Mountain 8920 3.3 -M * 18.0 -M * Crow Creek 8330 .0 .0 * 13.8 14.9 93 Deadman Hill 10220 20.4 18.3 111 24.4 22.4 109 ----- ----- Basin Index (%) 111* 102 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 20.2 18.4 110 Divide Peak 8880 9.7 10.5 92 28.3 26.0 109 Elk River 8700 5.6 3.3 170 23.4 24.2 97 Little Snake River 8915 20.6 18.0 114 43.5 34.9 125 Old Battle 10000 39.7 35.1 113 43.0 41.5 104 Sage Creek Basin 7850 -M .0 * 19.3 17.2 112 Sandstone RS 8150 .0 .0 * 22.3 22.2 100 Whiskey Park 8950 26.3 24.6 107 38.1 33.5 114 ----- ----- Basin Index (%) 111 109 UPPER GREEN RIVER Big Sandy Opening 9080 9.8 7.6 129 18.2 16.5 110 Blind Bull Sum 8650 25.7 22.0 117 22.1 22.8 97 East Rim Divide 7930 .0 3.9 0 14.6 13.9 105 Elkhart Park G.S. 9400 11.0 8.5 129 17.2 16.4 105 Gros Ventre Summit 8750 2.4 8.6 28 14.9 15.7 95 Gunsight Pass 9820 13.3 12.2 109 19.2 17.4 110 Indian Creek 9425 18.5 21.2 87 22.0 26.6 83 Kendall R.S. 7740 .0 .0 * 14.1 16.5 85 Loomis Park 8240 6.5 5.9 110 20.2 20.2 100 New Fork Lake 8340 .3 1.1 27 13.4 13.2 102 Pocket Creek 9360 11.8 -M * 18.0 -M * Snider Basin 8060 .0 4.8 0 15.7 16.6 95 Spring Creek Divide 9000 21.3 22.6 94 27.5 27.7 99 Triple Peak 8500 14.5 12.7 114 30.0 29.7 101 ----- ----- Basin Index (%) 94 98 LOWER GREEN RIVER Blacks Fork Jct 8869 .2 -M * 16.1 -M * Buck Pasture 9632 11.0 -M * 24.7 -M * EF Blacks Fork GS 9360 1.4 -M * 15.5 -M * Hams Fork 7840 .0 .0 * 15.2 14.2 107 Hewinta 9500 .9 .1 900* 18.6 17.5 106 Hickerson Park 9122 .4 .0 * 15.0 13.2 114 Hole-in-Rock 9168 .0 .0 * 14.3 12.7 113 Indian Creek 9425 18.5 21.2 87 22.0 26.6 83 Kelley R.S. 8180 4.9 6.4 77 19.2 21.5 89 Spirit Lk 10235 13.1 -M * 20.9 -M * Steel Creek Park 10158 15.5 16.5 94 23.3 20.7 113 ----- ----- Basin Index (%) 91* 101 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 18.6 -M * Bug Lake 7987 12.1 10.2 119 28.1 23.1 122 Burts Miller Ranch 8000 -M -M * 10.7 -M * Chalk Creek #1 9171 19.1 19.4 98 34.3 30.4 113 Hayden Fork 9130 2.9 3.1 94 27.8 25.5 109 Kelley R.S. 8180 4.9 6.4 77 19.2 21.5 89 Lily Lake 9133 4.9 1.2 408* 20.1 21.0 96 Monte Cristo 8932 27.3 19.0 144 37.3 31.2 120 Salt River Summit 7640 1.3 1.5 87 19.3 19.5 99 Spring Creek Divide 9000 21.3 22.6 94 27.5 27.7 99 ----- ----- Basin Index (%) 112 107 ----------------------------------------------------------------------------- -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.