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 8 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 10.7 5.5 195 24.6 23.5 105 Black Bear 8170 43.3 36.9 117 49.7 42.8 116 Blind Bull Sum 8650 23.9 22.6 106 21.6 22.0 98 Cottonwood Creek 7670 16.3 13.3 123 29.9 28.6 105 East Rim Divide 7930 .0 6.6 0 14.1 13.4 105 Grand Targhee 9260 49.1 46.4 106 38.4 35.9 107 Granite Creek 6770 10.0 6.3 159 23.6 21.9 108 Grassy Lake 7265 -M 26.7 * -M 40.3 * Gros Ventre Summit 8750 6.0 10.0 60 14.8 15.2 97 Gunsight Pass 9820 15.5 11.8 131 19.2 16.7 115 Lewis Lake Divide 7850 32.1 29.5 109 43.5 39.5 110 Phillips Bench 8200 26.4 23.4 113 36.2 31.6 115 Salt River Summit 7640 6.4 5.7 112 18.9 18.9 100 Snake River Station 6920 7.2 3.5 206 28.6 25.4 113 Spring Creek Divide 9000 23.4 24.0 98 26.8 26.9 100 Thumb Divide 7980 13.3 9.4 141 22.3 21.6 103 Togwotee Pass 9580 26.1 25.2 104 29.2 28.3 103 Two Ocean Plateau 9240 33.7 29.7 113 30.0 30.9 97 Willow Creek 8080 26.7 21.5 124 40.9 38.9 105 Younts Peak 8350 -M 15.6 * -M 18.3 * ----- ----- Basin Index (%) 112 106 MADISON-GALLATIN Black Bear 8170 43.3 36.9 117 49.7 42.8 116 Canyon 7870 11.1 8.0 139 18.9 18.6 102 Madison Plateau 7750 27.3 20.6 133 32.3 29.8 108 West Yellowstone 6700 .2 .0 * 19.8 16.5 120 Whiskey Creek 6800 14.7 11.5 128 24.4 22.9 107 ----- ----- Basin Index (%) 125 111 YELLOWSTONE Beartooth Lake 9360 25.5 23.0 111 23.9 22.8 105 Burnt Mtn 5880 2.7 .0 * 19.1 16.9 113 Canyon 7870 11.1 8.0 139 18.9 18.6 102 Cole Creek 7850 20.2 17.0 119 -M 17.5 * Evening Star 9200 29.1 25.2 115 35.0 31.5 111 Fisher Creek 9100 36.4 33.8 108 41.3 36.3 114 Northeast Entrance 7350 .1 1.0 10 17.1 14.4 119 Parker Peak 9400 28.8 21.7 133 28.9 20.9 138 Sylvan Lake 8420 19.7 18.2 108 31.7 26.0 122 Thumb Divide 7980 13.3 9.4 141 22.3 21.6 103 Two Ocean Plateau 9240 33.7 29.7 113 30.0 30.9 97 White Mill 8700 27.8 24.5 113 24.5 27.2 90 Wolverine 7650 1.8 .4 450* 15.8 14.3 110 Younts Peak 8350 -M 15.6 * -M 18.3 * ----- ----- Basin Index (%) 118 110 WIND RIVER Burroughs Creek 8750 8.0 -M * 16.7 -M * Castle Creek 8400 .0 -M * 8.7 -M * Cold Springs 9630 4.3 1.6 269 11.6 13.2 88 Deer Park 9700 15.2 14.6 104 22.3 24.3 92 Hobbs Park 10100 17.8 15.9 112 16.5 17.6 94 Kirwin 9550 10.0 10.8 93 13.8 14.6 95 Little Warm 9370 8.2 6.9 119 11.2 16.1 70 Owl Creek 8975 .3 .5 60* 9.5 8.4 113 South Pass 9040 12.5 12.6 99 15.7 21.1 74 St. Lawrence Alt 8620 -M 1.4 * -M 12.2 * Togwotee Pass 9580 26.1 25.2 104 29.2 28.3 103 Townsend Creek 8700 9.2 4.8 192 15.3 15.6 98 ----- ----- Basin Index (%) 112 91 BIGHORN BASIN Bald Mtn. 9380 19.6 20.4 96 15.9 20.7 77 Bear Trap Meadow 8200 .1 .2 50* 8.6 11.4 75 Bone Springs Div 9350 16.1 16.4 98 14.9 19.3 77 Grave Springs 8550 6.4 8.2 78 11.1 13.7 81 Kirwin 9550 10.0 10.8 93 13.8 14.6 95 Marquette 8760 7.1 -M * 12.0 -M * Middle Powder 7760 5.3 11.1 48 10.9 15.0 73 Owl Creek 8975 .3 .5 60* 9.5 8.4 113 Powder River Pass 9480 7.1 9.0 79 -M 16.0 * Shell Creek 9580 15.7 16.6 95 13.0 17.3 75 Timber Creek 7950 .6 1.8 33 9.6 10.7 90 ----- ----- Basin Index (%) 85 82 SHOSHONE RIVER Blackwater 9780 29.4 25.2 117 30.1 24.3 124 Evening Star 9200 29.1 25.2 115 35.0 31.5 111 Marquette 8760 7.1 -M * 12.0 -M * Sylvan Lake 8420 19.7 18.2 108 31.7 26.0 122 Sylvan Road 7120 .1 2.4 4 18.9 19.2 98 Younts Peak 8350 -M 15.6 * -M 18.3 * ----- ----- Basin Index (%) 110 115 POWDER RIVER Bear Trap Meadow 8200 .1 .2 50* 8.6 11.4 75 Cloud Peak Reservoir 9860 13.5 16.6 81 13.6 17.8 76 Grave Springs 8550 6.4 8.2 78 11.1 13.7 81 Hansen Sawmill 8360 2.8 1.5 187 10.3 11.6 89 Middle Powder 7760 5.3 11.1 48 10.9 15.0 73 Powder River Pass 9480 7.1 9.0 79 -M 16.0 * Soldier Park 8720 1.0 -M * 9.3 -M * ----- ----- Basin Index (%) 76 78 TONGUE RIVER Big Goose 7990 8.4 10.3 82 13.7 15.4 89 Bone Springs Div 9350 16.1 16.4 98 14.9 19.3 77 Burgess Junction 7880 8.6 11.4 75 11.1 15.7 71 Dome Lake 8880 8.2 11.2 73 12.4 17.5 71 Little Goose 8870 10.6 -M * 10.5 -M * Sucker Creek 8880 11.2 12.3 91 13.3 18.6 72 Tie Creek 6870 1.7 1.8 94 14.5 15.5 94 ----- ----- Basin Index (%) 85 78 BELLE FOURCHE Blind Park 6890 .0 .0 * 9.6 15.1 64 Cole Canyon 5910 .0 .0 * 15.1 13.2 114 ----- ----- Basin Index (%) * 87 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 9.6 15.1 64 North Rapid Creek 6130 .0 .0 * -M 13.0 * ----- ----- Basin Index (%) * 64 UPPER N. PLATTE Arapaho Ridge 10960 24.8 22.3 111 29.9 27.0 111 Blackhall Mtn 9820 33.0 -M * 38.3 -M * Columbine 9160 14.4 14.4 100 32.4 29.3 111 Divide Peak 8880 12.7 15.6 81 27.3 25.2 108 Joe Wright 10120 21.7 22.9 95 34.3 30.9 111 Laprele Creek 8375 3.8 4.0 95 16.8 15.8 106 Med Bow 10500 41.2 -M * 40.6 -M * Never Summer 10280 24.8 22.1 112 22.6 -M * North French Creek 10130 31.6 32.8 96 34.9 31.9 109 Old Battle 10000 40.0 36.2 110 42.2 40.4 104 Rawah 9020 5.0 3.4 147 20.3 17.9 113 Sage Creek Basin 7850 4.6 .0 * 19.2 16.7 115 Sand Lake 10050 32.0 31.8 101 29.2 30.1 97 South Brush Creek 8440 .0 6.2 0 14.9 18.7 80 Tower 10500 54.9 51.4 107 52.3 46.1 113 Webber Springs 9250 21.5 20.2 106 35.4 30.8 115 Whiskey Park 8950 27.4 27.0 101 37.5 32.6 115 Willow Creek Pass 9540 17.1 14.0 122 20.7 16.3 127 Zirkel 9340 24.0 20.1 119 42.5 32.0 133 ----- ----- Basin Index (%) 105 111 SWEETWATER Deer Park 9700 15.2 14.6 104 22.3 24.3 92 Larsen Creek 9000 .3 7.1 4 16.8 -M * South Pass 9040 12.5 12.6 99 15.7 21.1 74 ----- ----- Basin Index (%) 82 84 LOWER N. PLATTE Casper Mtn. 7900 8.7 11.9 73 15.0 19.0 79 Laprele Creek 8375 3.8 4.0 95 16.8 15.8 106 Reno Hill 8400 13.2 11.4 116 20.8 19.9 105 Windy Peak 7900 1.7 1.6 106 13.8 13.6 101 ----- ----- Basin Index (%) 95 97 LARAMIE RIVER Brooklyn Lake 10240 22.8 21.9 104 30.4 25.7 118 Cinnabar Park 9574 17.7 18.0 98 27.5 28.0 98 Crow Creek 8330 .0 .0 * 13.2 14.1 94 Deadman Hill 10220 21.5 18.7 115 23.6 21.5 110 Rawah 9020 5.0 3.4 147 20.3 17.9 113 Roach 9700 14.1 16.4 86 25.9 23.1 112 Windy Peak 7900 1.7 1.6 106 13.8 13.6 101 ----- ----- Basin Index (%) 104 108 S. PLATTE Black Mountain 8920 5.8 -M * 17.0 -M * Crow Creek 8330 .0 .0 * 13.2 14.1 94 Deadman Hill 10220 21.5 18.7 115 23.6 21.5 110 ----- ----- Basin Index (%) 115* 103 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 20.0 17.7 113 Divide Peak 8880 12.7 15.6 81 27.3 25.2 108 Elk River 8700 10.1 9.3 109 23.2 23.5 99 Little Snake River 8915 24.3 20.9 116 43.0 34.0 126 Old Battle 10000 40.0 36.2 110 42.2 40.4 104 Sage Creek Basin 7850 4.6 .0 * 19.2 16.7 115 Sandstone RS 8150 4.8 2.7 178 21.9 21.5 102 Whiskey Park 8950 27.4 27.0 101 37.5 32.6 115 ----- ----- Basin Index (%) 111 111 UPPER GREEN RIVER Big Sandy Opening 9080 12.7 8.7 146 18.0 15.9 113 Blind Bull Sum 8650 23.9 22.6 106 21.6 22.0 98 East Rim Divide 7930 .0 6.6 0 14.1 13.4 105 Elkhart Park G.S. 9400 13.8 9.8 141 17.0 15.7 108 Gros Ventre Summit 8750 6.0 10.0 60 14.8 15.2 97 Gunsight Pass 9820 15.5 11.8 131 19.2 16.7 115 Indian Creek 9425 20.0 21.1 95 20.8 25.8 81 Kendall R.S. 7740 2.6 .2 1300* 13.9 16.0 87 Loomis Park 8240 10.2 8.0 128 19.7 19.6 101 New Fork Lake 8340 4.2 3.5 120 12.2 12.7 96 Pocket Creek 9360 14.4 -M * 17.9 -M * Snider Basin 8060 .0 7.6 0 15.0 16.1 93 Spring Creek Divide 9000 23.4 24.0 98 26.8 26.9 100 Triple Peak 8500 18.1 15.3 118 29.3 28.9 101 ----- ----- Basin Index (%) 101 99 LOWER GREEN RIVER Blacks Fork Jct 8869 2.0 -M * 16.0 -M * Buck Pasture 9632 13.4 -M * 24.2 -M * EF Blacks Fork GS 9360 5.7 -M * 15.2 -M * Hams Fork 7840 .0 .3 0* 14.1 13.6 104 Hewinta 9500 5.0 2.9 172 18.3 16.9 108 Hickerson Park 9122 1.8 1.2 150 14.4 12.6 114 Hole-in-Rock 9168 .4 .7 57* 13.8 12.1 114 Indian Creek 9425 20.0 21.1 95 20.8 25.8 81 Kelley R.S. 8180 8.5 8.9 96 18.6 20.8 89 Spirit Lk 10235 13.7 -M * 20.2 -M * Steel Creek Park 10158 17.3 17.7 98 23.0 19.9 116 ----- ----- Basin Index (%) 100* 101 UPPER BEAR RIVER Bear River RS 8777 .1 -M * 18.1 -M * Bug Lake 7987 16.8 12.6 133 27.5 22.4 123 Burts Miller Ranch 8000 -M -M * 10.5 -M * Chalk Creek #1 9171 22.1 22.2 100 33.8 29.4 115 Hayden Fork 9130 7.8 6.6 118 27.4 24.6 111 Kelley R.S. 8180 8.5 8.9 96 18.6 20.8 89 Lily Lake 9133 7.9 7.0 113 19.7 20.3 97 Monte Cristo 8932 30.2 22.7 133 36.4 30.3 120 Salt River Summit 7640 6.4 5.7 112 18.9 18.9 100 Spring Creek Divide 9000 23.4 24.0 98 26.8 26.9 100 ----- ----- Basin Index (%) 112 108 ----------------------------------------------------------------------------- -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.