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 23 , 2018 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 .0 .0 * 26.9 24.8 108 Black Bear 8170 40.4 32.3 125 48.4 45.0 108 Blind Bull Sum 8650 -M 18.3 * 25.5 23.5 109 Cottonwood Creek 7670 .8 3.4 24 32.7 30.4 108 East Rim Divide 7930 .1 .0 * 16.3 14.4 113 Grand Targhee 9260 44.0 41.4 106 41.3 37.5 110 Granite Creek 6770 .1 .0 * 27.8 23.2 120 Grassy Lake 7265 10.0 14.3 70 42.3 42.3 100 Gros Ventre Summit 8750 3.1 3.5 89 19.0 16.4 116 Gunsight Pass 9820 12.2 8.7 140 22.2 18.0 123 Lewis Lake Divide 7850 22.9 20.2 113 45.9 41.4 111 Phillips Bench 8200 17.5 16.7 105 34.3 33.3 103 Salt River Summit 7640 .0 .0 * 16.2 20.2 80 Snake River Station 6920 .0 .0 * 28.0 26.8 104 Spring Creek Divide 9000 19.0 18.3 104 30.3 28.4 107 Thumb Divide 7980 .0 .3 0* 22.8 23.1 99 Togwotee Pass 9580 27.6 22.7 122 40.0 30.1 133 Two Ocean Plateau 9240 32.3 27.9 116 35.3 33.3 106 Willow Creek 8080 11.5 13.6 85 44.8 41.3 108 Younts Peak 8350 -M 10.7 * -M 19.9 * ----- ----- Basin Index (%) 108 108 MADISON-GALLATIN Black Bear 8170 40.4 32.3 125 48.4 45.0 108 Canyon 7870 1.7 .6 283* 22.6 20.2 112 Madison Plateau 7750 16.4 12.9 127 33.7 32.0 105 West Yellowstone 6700 .0 .0 * 21.5 17.8 121 Whiskey Creek 6800 4.1 3.7 111 24.8 24.6 101 ----- ----- Basin Index (%) 126 108 YELLOWSTONE Beartooth Lake 9360 -M 20.8 * 39.8 24.4 163 Burnt Mtn 5880 .1 .0 * 21.6 19.7 110 Canyon 7870 1.7 .6 283* 22.6 20.2 112 Cole Creek 7850 9.8 14.7 67 20.1 19.9 101 Evening Star 9200 34.2 22.6 151 50.5 33.7 150 Fisher Creek 9100 48.6 31.9 152 53.2 38.8 137 Northeast Entrance 7350 .0 .0 * 21.4 15.9 135 Parker Peak 9400 24.1 19.2 126 34.5 22.8 151 Sylvan Lake 8420 8.7 13.7 64 32.8 28.1 117 Thumb Divide 7980 .0 .3 0* 22.8 23.1 99 Two Ocean Plateau 9240 32.3 27.9 116 35.3 33.3 106 White Mill 8700 34.0 21.4 159 36.6 29.3 125 Wolverine 7650 .0 .0 * 24.5 15.8 155 ----- ----- Basin Index (%) 127 128 WIND RIVER Burroughs Creek 8750 .0 -M * 23.4 -M * Castle Creek 8400 .0 -M * 14.3 -M * Cold Springs 9630 .0 .0 * 14.1 14.6 97 Deer Park 9700 5.6 9.1 62 21.3 26.3 81 Hobbs Park 10100 11.4 11.8 97 20.2 19.6 103 Kirwin 9550 10.0 7.0 143 23.2 16.2 143 Little Warm 9370 4.4 1.0 440* 21.0 17.7 119 Owl Creek 8975 -M .0 * 11.3 9.9 114 South Pass 9040 .1 4.1 2 13.8 22.7 61 St. Lawrence Alt 8620 .0 .0 * 12.5 13.7 91 Togwotee Pass 9580 27.6 22.7 122 40.0 30.1 133 Townsend Creek 8700 .0 .0 * 14.5 17.4 83 ----- ----- Basin Index (%) 106* 102 BIGHORN BASIN Bald Mtn. 9380 15.6 18.0 87 20.9 22.4 93 Bear Trap Meadow 8200 .0 .0 * 13.4 12.9 104 Bone Springs Div 9350 11.9 13.4 89 20.2 21.3 95 Grave Springs 8550 .0 .3 0* 9.1 15.2 60 Kirwin 9550 10.0 7.0 143 23.2 16.2 143 Marquette 8760 .1 -M * 17.0 -M * Middle Powder 7760 .0 2.6 0 9.5 16.5 58 Owl Creek 8975 -M .0 * 11.3 9.9 114 Powder River Pass 9480 5.6 3.2 175 19.7 17.7 111 Shell Creek 9580 15.3 14.4 106 20.1 18.9 106 Timber Creek 7950 .1 .0 * 7.4 12.5 59 ----- ----- Basin Index (%) 99 95 SHOSHONE RIVER Blackwater 9780 30.9 23.6 131 37.2 26.3 141 Evening Star 9200 34.2 22.6 151 50.5 33.7 150 Marquette 8760 .1 -M * 17.0 -M * Sylvan Road 7120 .1 .0 * 25.3 20.6 123 Younts Peak 8350 -M 10.7 * -M 19.9 * ----- ----- Basin Index (%) 141* 140 POWDER RIVER Bear Trap Meadow 8200 .0 .0 * 13.4 12.9 104 Cloud Peak Reservoir 9860 10.1 13.2 77 21.4 20.0 107 Grave Springs 8550 .0 .3 0* 9.1 15.2 60 Hansen Sawmill 8360 .1 .0 * 15.9 13.3 120 Middle Powder 7760 .0 2.6 0 9.5 16.5 58 Powder River Pass 9480 5.6 3.2 175 19.7 17.7 111 Soldier Park 8720 .2 -M * 15.3 -M * ----- ----- Basin Index (%) 82* 93 TONGUE RIVER Big Goose 7990 .0 2.1 0 13.4 17.5 77 Bone Springs Div 9350 11.9 13.4 89 20.2 21.3 95 Burgess Junction 7880 .4 6.2 6 13.5 17.3 78 Dome Lake 8880 4.5 4.0 112 18.7 19.4 96 Little Goose 8870 .0 -M * 17.2 -M * Sucker Creek 8880 .0 7.0 0 14.2 20.6 69 Tie Creek 6870 .1 .0 * 14.1 17.6 80 ----- ----- Basin Index (%) 52 83 BELLE FOURCHE Cole Canyon 5910 .0 .0 * 14.1 15.1 93 ----- ----- Basin Index (%) * 93 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * -M 17.2 * North Rapid Creek 6130 .0 .0 * -M 14.9 * ----- ----- Basin Index (%) * * UPPER N. PLATTE Arapaho Ridge 10960 11.5 15.5 74 25.8 28.7 90 Blackhall Mtn 9820 9.5 -M * 30.9 -M * Columbine 9160 .0 .1 0* 30.1 30.8 98 Divide Peak 8880 .0 3.0 0 21.3 26.7 80 Joe Wright 10120 11.8 19.7 60 35.7 33.2 108 Laprele Creek 8375 .1 .0 * 11.6 17.1 68 Med Bow 10500 29.9 -M * 39.6 -M * North French Creek 10130 17.4 27.5 63 32.5 34.1 95 Never Summer 10280 16.9 18.8 90 21.1 -M * Old Battle 10000 18.4 31.3 59 27.6 42.4 65 Rawah 9020 .2 .1 200* 18.4 19.1 96 Sage Creek Basin 7850 -M .0 * 12.2 17.5 70 Sand Lake 10050 21.8 26.4 83 28.1 32.2 87 South Brush Creek 8440 .0 .0 * 14.1 20.4 69 Tower 10500 28.2 46.4 61 42.9 48.2 89 Webber Springs 9250 .0 8.8 0 24.5 32.3 76 Willow Creek Pass 9540 2.7 7.5 36 17.5 17.6 99 Zirkel 9340 .0 5.0 0 35.5 33.5 106 ----- ----- Basin Index (%) 61 87 SWEETWATER Deer Park 9700 5.6 9.1 62 21.3 26.3 81 Larsen Creek 9000 .1 2.7 4 15.3 -M * South Pass 9040 .1 4.1 2 13.8 22.7 61 ----- ----- Basin Index (%) 36 72 LOWER N. PLATTE Casper Mtn. 7900 .0 2.2 0 10.8 20.7 52 Laprele Creek 8375 .1 .0 * 11.6 17.1 68 Reno Hill 8400 .1 .8 12* 16.3 21.6 75 Windy Peak 7900 .1 .0 * 13.5 15.1 89 ----- ----- Basin Index (%) 10* 70 LARAMIE RIVER Brooklyn Lake 10240 7.9 13.8 57 30.3 27.5 110 Cinnabar Park 9574 3.2 9.5 34 28.4 29.8 95 Crow Creek 8330 .0 .0 * 14.7 15.5 95 Deadman Hill 10220 6.0 14.6 41 24.1 23.3 103 Rawah 9020 .2 .1 200* 18.4 19.1 96 Roach 9700 .3 9.2 3 20.9 24.9 84 ----- ----- Basin Index (%) 37 98 S. PLATTE Black Mountain 8920 -M -M * 16.8 -M * Crow Creek 8330 .0 .0 * 14.7 15.5 95 Deadman Hill 10220 6.0 14.6 41 24.1 23.3 103 ----- ----- Basin Index (%) 41* 100 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 13.4 18.7 72 Divide Peak 8880 .0 3.0 0 21.3 26.7 80 Elk River 8700 .0 .0 * 19.4 24.8 78 Little Snake River 8915 .0 9.9 0 31.6 35.4 89 Old Battle 10000 18.4 31.3 59 27.6 42.4 65 Sage Creek Basin 7850 -M .0 * 12.2 17.5 70 Sandstone RS 8150 -M .0 * 11.9 22.7 52 Whiskey Park 8950 .3 18.8 2 29.5 34.0 87 ----- ----- Basin Index (%) 30 75 UPPER GREEN RIVER Big Sandy Opening 9080 -M .4 * 16.9 17.1 99 Blind Bull Sum 8650 -M 18.3 * 25.5 23.5 109 East Rim Divide 7930 .1 .0 * 16.3 14.4 113 Elkhart Park G.S. 9400 .3 4.2 7 16.5 17.1 96 Gros Ventre Summit 8750 3.1 3.5 89 19.0 16.4 116 Gunsight Pass 9820 12.2 8.7 140 22.2 18.0 123 Kendall R.S. 7740 .1 .0 * 19.6 17.0 115 Loomis Park 8240 .3 .5 60* 22.7 20.8 109 New Fork Lake 8340 .0 .0 * 15.9 13.8 115 Pocket Creek 9360 -M -M * 12.4 -M * Snider Basin 8060 .0 .0 * 18.0 17.0 106 Spring Creek Divide 9000 19.0 18.3 104 30.3 28.4 107 Triple Peak 8500 11.0 5.5 200 38.2 30.6 125 ----- ----- Basin Index (%) 113* 112 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 -M * 12.4 -M * Buck Pasture 9632 .0 -M * 18.8 -M * EF Blacks Fork GS 9360 .0 -M * 13.0 -M * Hams Fork 7840 .0 .0 * 13.9 14.7 95 Hewinta 9500 .0 .0 * 15.5 17.9 87 Hickerson Park 9122 .4 .0 * 12.8 13.7 93 Hole-in-Rock 9168 .0 .0 * 13.5 13.3 102 Indian Creek 9425 11.0 16.3 67 21.0 27.3 77 Kelley R.S. 8180 .0 .7 0* 18.7 22.1 85 Spirit Lk 10235 1.3 -M * 17.4 -M * Steel Creek Park 10158 7.5 13.3 56 19.7 21.3 92 ----- ----- Basin Index (%) 62* 88 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 14.0 -M * Bug Lake 7987 .1 1.2 8* 20.4 23.8 86 Burts Miller Ranch 8000 .1 -M * 7.8 -M * Chalk Creek #1 9171 .1 12.8 1 20.2 31.1 65 Hayden Fork 9130 .2 .0 * 20.6 26.1 79 Kelley R.S. 8180 .0 .7 0* 18.7 22.1 85 Lily Lake 9133 .0 .0 * 15.2 21.6 70 Monte Cristo 8932 5.2 11.9 44 27.1 32.0 85 Salt River Summit 7640 .0 .0 * 16.2 20.2 80 ----- ----- Basin Index (%) 21* 78 ----------------------------------------------------------------------------- -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.