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 FRIDAY: MAY 17 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 2.4 .0 * 24.8 24.2 102 Black Bear 8170 39.7 35.3 112 50.4 44.3 114 Blind Bull Sum 8650 26.7 21.5 124 22.2 23.0 97 Cottonwood Creek 7670 9.5 8.9 107 30.8 29.6 104 East Rim Divide 7930 .0 2.6 0 14.8 14.0 106 Grand Targhee 9260 43.6 44.0 99 38.8 36.7 106 Granite Creek 6770 2.8 .0 * 24.0 22.7 106 Grassy Lake 7265 -M 20.4 * -M 41.5 * Gros Ventre Summit 8750 1.0 7.6 13 14.9 15.9 94 Gunsight Pass 9820 12.3 11.7 105 19.4 17.5 111 Lewis Lake Divide 7850 24.6 24.5 100 44.1 40.6 109 Phillips Bench 8200 20.3 21.0 97 36.8 32.6 113 Salt River Summit 7640 .0 .6 0* 19.5 19.7 99 Snake River Station 6920 .0 .0 * 29.1 26.2 111 Spring Creek Divide 9000 19.9 22.0 90 27.8 27.8 100 Thumb Divide 7980 6.4 3.6 178 22.8 22.5 101 Togwotee Pass 9580 22.3 23.8 94 29.4 29.3 100 Two Ocean Plateau 9240 28.0 29.0 97 30.2 32.4 93 Willow Creek 8080 18.1 18.8 96 41.4 40.4 102 Younts Peak 8350 -M 12.9 * -M 19.2 * ----- ----- Basin Index (%) 101 104 MADISON-GALLATIN Black Bear 8170 39.7 35.3 112 50.4 44.3 114 Canyon 7870 5.3 4.2 126 19.3 19.6 98 Madison Plateau 7750 21.3 15.9 134 33.0 31.1 106 West Yellowstone 6700 .1 .0 * 20.4 17.4 117 Whiskey Creek 6800 10.3 7.6 136 24.8 24.0 103 ----- ----- Basin Index (%) 122 108 YELLOWSTONE Beartooth Lake 9360 23.7 22.3 106 24.7 23.9 103 Burnt Mtn 5880 .0 .0 * 20.2 18.9 107 Canyon 7870 5.3 4.2 126 19.3 19.6 98 Cole Creek 7850 18.6 16.8 111 -M 19.2 * Evening Star 9200 25.9 24.9 104 35.7 32.9 109 Fisher Creek 9100 33.8 33.6 101 42.3 37.9 112 Northeast Entrance 7350 .1 .0 * 17.9 15.3 117 Parker Peak 9400 23.9 20.9 114 29.3 22.1 133 Sylvan Lake 8420 13.7 16.3 84 32.0 27.2 118 Thumb Divide 7980 6.4 3.6 178 22.8 22.5 101 Two Ocean Plateau 9240 28.0 29.0 97 30.2 32.4 93 White Mill 8700 23.8 23.7 100 25.2 28.6 88 Wolverine 7650 .0 .0 * 16.3 15.3 107 Younts Peak 8350 -M 12.9 * -M 19.2 * ----- ----- Basin Index (%) 104 107 WIND RIVER Burroughs Creek 8750 2.2 -M * 17.1 -M * Castle Creek 8400 .0 -M * 9.3 -M * Cold Springs 9630 .0 .0 * 12.4 14.2 87 Deer Park 9700 12.6 12.4 102 23.5 25.7 91 Hobbs Park 10100 16.6 14.4 115 18.1 19.0 95 Kirwin 9550 6.3 9.7 65 14.8 15.6 95 Little Warm 9370 3.1 4.9 63 11.1 17.1 65 Owl Creek 8975 .0 .0 * 10.0 9.4 106 South Pass 9040 9.4 9.2 102 17.1 22.2 77 St. Lawrence Alt 8620 -M .0 * -M 13.2 * Togwotee Pass 9580 22.3 23.8 94 29.4 29.3 100 Townsend Creek 8700 6.2 .3 2067* 17.2 16.8 102 ----- ----- Basin Index (%) 102 91 BIGHORN BASIN Bald Mtn. 9380 19.1 20.3 94 17.7 21.8 81 Bear Trap Meadow 8200 .0 .0 * 10.0 12.4 81 Bone Springs Div 9350 14.1 15.3 92 16.1 20.5 79 Grave Springs 8550 3.0 5.2 58 12.2 14.8 82 Kirwin 9550 6.3 9.7 65 14.8 15.6 95 Marquette 8760 4.5 -M * 14.7 -M * Middle Powder 7760 -M 7.7 * 12.4 16.0 78 Owl Creek 8975 .0 .0 * 10.0 9.4 106 Powder River Pass 9480 2.7 7.4 36 -M 17.0 * Shell Creek 9580 14.2 16.1 88 14.0 18.3 77 Timber Creek 7950 .2 .0 * 10.5 11.9 88 ----- ----- Basin Index (%) 81 84 SHOSHONE RIVER Blackwater 9780 26.9 24.9 108 31.0 25.6 121 Evening Star 9200 25.9 24.9 104 35.7 32.9 109 Marquette 8760 4.5 -M * 14.7 -M * Sylvan Lake 8420 13.7 16.3 84 32.0 27.2 118 Sylvan Road 7120 .0 .0 * 19.2 20.0 96 Younts Peak 8350 -M 12.9 * -M 19.2 * ----- ----- Basin Index (%) 101 112 POWDER RIVER Bear Trap Meadow 8200 .0 .0 * 10.0 12.4 81 Cloud Peak Reservoir 9860 12.2 15.8 77 15.3 19.3 79 Grave Springs 8550 3.0 5.2 58 12.2 14.8 82 Hansen Sawmill 8360 .2 .0 * 10.8 12.6 86 Middle Powder 7760 -M 7.7 * 12.4 16.0 78 Powder River Pass 9480 2.7 7.4 36 -M 17.0 * Soldier Park 8720 .1 -M * 10.0 -M * ----- ----- Basin Index (%) 64* 81 TONGUE RIVER Big Goose 7990 6.3 7.5 84 15.1 16.8 90 Bone Springs Div 9350 14.1 15.3 92 16.1 20.5 79 Burgess Junction 7880 6.3 9.8 64 12.7 16.7 76 Dome Lake 8880 6.1 8.5 72 13.9 18.7 74 Little Goose 8870 8.2 -M * 11.5 -M * Sucker Creek 8880 9.2 10.3 89 15.5 19.9 78 Tie Creek 6870 .1 .0 * 16.2 16.9 96 ----- ----- Basin Index (%) 82 82 BELLE FOURCHE Blind Park 6890 .0 .0 * 10.1 16.4 62 Cole Canyon 5910 .0 .0 * 16.5 14.6 113 ----- ----- Basin Index (%) * 86 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 10.1 16.4 62 North Rapid Creek 6130 -M .0 * -M 14.3 * ----- ----- Basin Index (%) * 62 UPPER N. PLATTE Arapaho Ridge 10960 23.0 20.5 112 30.9 28.4 109 Blackhall Mtn 9820 29.5 -M * 39.0 -M * Columbine 9160 8.8 6.4 138 33.2 30.4 109 Divide Peak 8880 7.1 8.6 83 28.3 26.2 108 Joe Wright 10120 20.2 22.3 91 35.0 32.5 108 Laprele Creek 8375 .0 .0 * 17.8 16.6 107 Med Bow 10500 40.0 -M * 41.3 -M * Never Summer 10280 23.1 21.7 106 23.0 -M * North French Creek 10130 28.5 31.3 91 35.4 33.4 106 Old Battle 10000 38.8 33.9 114 43.0 41.8 103 Rawah 9020 .2 .9 22* 20.5 18.8 109 Sage Creek Basin 7850 -M .0 * 19.3 17.2 112 Sand Lake 10050 30.5 29.3 104 30.1 31.5 96 South Brush Creek 8440 .0 .5 0* 16.1 19.8 81 Tower 10500 55.5 49.0 113 53.3 47.5 112 Webber Springs 9250 17.9 14.8 121 36.5 31.8 115 Whiskey Park 8950 -M 23.8 * -M 33.7 * Willow Creek Pass 9540 14.4 10.6 136 21.0 17.1 123 Zirkel 9340 17.9 14.3 125 43.3 33.3 130 ----- ----- Basin Index (%) 108 109 SWEETWATER Deer Park 9700 12.6 12.4 102 23.5 25.7 91 Larsen Creek 9000 .1 4.5 2 16.9 -M * South Pass 9040 9.4 9.2 102 17.1 22.2 77 ----- ----- Basin Index (%) 85 85 LOWER N. PLATTE Casper Mtn. 7900 5.2 7.4 70 16.7 20.1 83 Laprele Creek 8375 .0 .0 * 17.8 16.6 107 Reno Hill 8400 9.5 6.4 148 22.1 21.0 105 Windy Peak 7900 .6 .0 * -M 14.4 * ----- ----- Basin Index (%) 111 98 LARAMIE RIVER Brooklyn Lake 10240 18.4 18.7 98 31.3 26.9 116 Cinnabar Park 9574 14.7 14.4 102 28.3 29.4 96 Crow Creek 8330 .0 .0 * 13.8 15.0 92 Deadman Hill 10220 18.2 17.9 102 24.4 22.7 107 Rawah 9020 .2 .9 22* 20.5 18.8 109 Roach 9700 10.6 13.1 81 26.8 24.3 110 Windy Peak 7900 .6 .0 * -M 14.4 * ----- ----- Basin Index (%) 96 106 S. PLATTE Black Mountain 8920 1.1 -M * 18.0 -M * Crow Creek 8330 .0 .0 * 13.8 15.0 92 Deadman Hill 10220 18.2 17.9 102 24.4 22.7 107 ----- ----- Basin Index (%) 102* 101 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 20.1 18.5 109 Divide Peak 8880 7.1 8.6 83 28.3 26.2 108 Elk River 8700 3.1 1.2 258* 23.5 24.4 96 Little Snake River 8915 18.7 16.5 113 43.6 35.0 125 Old Battle 10000 38.8 33.9 114 43.0 41.8 103 Sage Creek Basin 7850 -M .0 * 19.3 17.2 112 Sandstone RS 8150 -M .0 * 22.6 22.3 101 Whiskey Park 8950 -M 23.8 * -M 33.7 * ----- ----- Basin Index (%) 112* 108 UPPER GREEN RIVER Big Sandy Opening 9080 7.9 6.1 130 18.1 16.6 109 Blind Bull Sum 8650 26.7 21.5 124 22.2 23.0 97 East Rim Divide 7930 .0 2.6 0 14.8 14.0 106 Elkhart Park G.S. 9400 9.2 7.5 123 17.3 16.5 105 Gros Ventre Summit 8750 1.0 7.6 13 14.9 15.9 94 Gunsight Pass 9820 12.3 11.7 105 19.4 17.5 111 Indian Creek 9425 17.2 20.5 84 22.0 26.8 82 Kendall R.S. 7740 .0 .0 * 14.3 16.6 86 Loomis Park 8240 5.0 4.8 104 20.4 20.4 100 New Fork Lake 8340 .0 .4 0* 13.7 13.4 102 Pocket Creek 9360 10.3 -M * 18.1 -M * Snider Basin 8060 .0 2.9 0 15.7 16.6 95 Spring Creek Divide 9000 19.9 22.0 90 27.8 27.8 100 Triple Peak 8500 12.8 11.1 115 30.4 30.0 101 ----- ----- Basin Index (%) 94 98 LOWER GREEN RIVER Blacks Fork Jct 8869 .2 -M * 16.1 -M * Buck Pasture 9632 8.5 -M * 24.7 -M * EF Blacks Fork GS 9360 .1 -M * 15.5 -M * Hams Fork 7840 .0 .0 * 15.2 14.2 107 Hewinta 9500 .0 .0 * 18.6 17.6 106 Hickerson Park 9122 .5 .0 * 15.0 13.3 113 Hole-in-Rock 9168 .0 .0 * 14.3 12.8 112 Indian Creek 9425 17.2 20.5 84 22.0 26.8 82 Kelley R.S. 8180 3.2 5.1 63 19.4 21.6 90 Spirit Lk 10235 11.3 -M * 20.9 -M * Steel Creek Park 10158 14.1 15.8 89 23.4 20.8 112 ----- ----- Basin Index (%) 85* 101 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 18.6 -M * Bug Lake 7987 10.2 8.4 121 28.5 23.2 123 Burts Miller Ranch 8000 -M -M * 10.8 -M * Chalk Creek #1 9171 17.4 18.0 97 34.4 30.6 112 Hayden Fork 9130 .5 1.1 45* 27.9 25.6 109 Kelley R.S. 8180 3.2 5.1 63 19.4 21.6 90 Lily Lake 9133 2.2 .0 * 20.2 21.2 95 Monte Cristo 8932 25.8 17.5 147 37.8 31.4 120 Salt River Summit 7640 .0 .6 0* 19.5 19.7 99 Spring Creek Divide 9000 19.9 22.0 90 27.8 27.8 100 ----- ----- Basin Index (%) 109 107 ----------------------------------------------------------------------------- -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.