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 SATURDAY: MAY 18 , 2024 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 -M .0 * 23.9 24.4 98 Blind Bull Sum 8650 28.7 22.5 128 19.8 20.8 95 Cottonwood Creek 7670 8.4 9.2 91 31.5 30.0 105 East Rim Divide 7930 -M .0 * 13.5 13.9 97 Grand Targhee 9260 40.3 44.0 92 36.8 37.8 97 Granite Creek 6770 -M .5 * 20.0 22.4 89 Grassy Lake 7265 15.0 18.3 82 38.4 41.2 93 Gros Ventre Summit 8750 4.4 6.8 65 -M 15.4 * Gunsight Pass 9820 9.5 11.0 86 18.1 17.4 104 Lewis Lake Divide 7850 18.6 22.8 82 39.1 39.2 100 Loomis Park 8240 .4 3.9 10 18.1 20.5 88 Phillips Bench 8200 21.1 20.4 103 33.8 31.0 109 Salt River Summit 7640 -M .0 * 16.8 18.9 89 Snake River Station 6920 -M .0 * 25.2 26.8 94 Somsen Ranch 6800 -M .0 * 24.0 19.6 122 Spring Creek Divide 9000 21.8 21.1 103 26.1 27.6 95 Thumb Divide 7980 4.2 2.2 191 20.8 22.3 93 Togwotee Pass 9580 19.4 23.2 84 25.2 29.0 87 Triple Peak 8500 12.8 12.0 107 29.9 30.3 99 Two Ocean Plateau 9240 27.3 30.4 90 30.8 31.2 99 Willow Creek 8080 19.3 18.6 104 40.4 40.2 100 Younts Peak 8350 1.0 8.8 11 18.5 18.4 101 ----- ----- Basin Index (%) 92 98 MADISON HEADWATERS IN WYOMING Black Bear 8170 29.0 36.0 81 41.8 42.8 98 Canyon 7870 2.9 -M * 15.9 -M * Madison Plateau 7750 12.4 15.8 78 26.2 30.6 86 West Yellowstone 6700 -M .0 * 15.1 16.8 90 Whiskey Creek 6800 3.9 6.0 65 21.6 24.4 89 ----- ----- Basin Index (%) 78 91 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 19.0 23.7 80 20.9 25.2 83 Canyon 7870 2.9 -M * 15.9 -M * Evening Star 9200 17.0 24.0 71 30.8 33.8 91 Fisher Creek 9100 23.3 36.0 65 31.9 40.9 78 Monument Peak 8850 13.9 19.6 71 24.2 27.2 89 Northeast Entrance 7350 .0 .0 * 14.3 16.2 88 Parker Peak 9400 20.0 19.8 101 27.0 24.0 112 Sylvan Lake 8420 8.1 13.7 59 27.4 28.0 98 Thumb Divide 7980 4.2 2.2 191 20.8 22.3 93 Two Ocean Plateau 9240 27.3 30.4 90 30.8 31.2 99 White Mill 8700 16.4 24.0 68 22.4 27.6 81 Wolverine 7650 -M .0 * 15.9 15.4 103 ----- ----- Basin Index (%) 77 91 WIND RIVER Burroughs Creek 8750 .3 -M * 13.9 -M * Castle Creek 8400 .0 .0 * 10.2 11.8 86 Cold Springs 9630 .0 .0 * 14.8 13.5 110 Deer Park 9700 17.8 11.4 156 26.9 23.5 114 Hobbs Park 10100 20.6 15.4 134 24.2 18.8 129 Kirwin 9550 10.4 10.1 103 20.0 16.6 120 Little Warm 9370 5.0 4.2 119 17.5 15.5 113 South Pass 9040 13.1 9.2 142 23.5 20.2 116 St. Lawrence Alt 8620 -M -M * 14.8 -M * Togwotee Pass 9580 19.4 23.2 84 25.2 29.0 87 Townsend Creek 8700 7.6 1.6 475 19.7 15.7 125 ----- ----- Basin Index (%) 125 111 BIGHORN BASIN Bald Mtn. 9380 18.6 19.2 97 18.6 20.3 92 Bear Trap Meadow 8200 -M .0 * 13.3 12.6 106 Bone Springs Div 9350 16.2 15.1 107 16.8 19.5 86 Grave Springs 8550 3.0 4.4 68 14.4 13.3 108 Kirwin 9550 10.4 10.1 103 20.0 16.6 120 Marquette 8760 13.8 4.9 282 22.8 15.1 151 Middle Powder 7760 9.1 4.8 190 15.3 14.0 109 Owl Creek 8975 -M .0 * 12.2 9.6 127 Powder River Pass 9480 4.2 7.2 58 16.5 17.4 95 Shell Creek 9580 15.8 15.0 105 18.8 17.6 107 Timber Creek 7950 2.4 .0 * 17.0 12.2 139 ----- ----- Basin Index (%) 116 110 SHOSHONE RIVER Blackwater 9780 23.7 23.0 103 28.3 27.8 102 Evening Star 9200 17.0 24.0 71 30.8 33.8 91 Marquette 8760 13.8 4.9 282 22.8 15.1 151 Sylvan Lake 8420 8.1 13.7 59 27.4 28.0 98 Sylvan Road 7120 -M .0 * 17.5 19.3 91 Younts Peak 8350 1.0 8.8 11 18.5 18.4 101 ----- ----- Basin Index (%) 85 102 POWDER RIVER Bear Trap Meadow 8200 -M .0 * 13.3 12.6 106 Cloud Peak Reservoir 9860 16.3 14.6 112 22.2 19.7 113 Grave Springs 8550 3.0 4.4 68 14.4 13.3 108 Hansen Sawmill 8360 -M .1 * 13.9 13.2 105 Middle Powder 7760 9.1 4.8 190 15.3 14.0 109 Powder River Pass 9480 4.2 7.2 58 16.5 17.4 95 Soldier Park 8720 .1 .0 * 14.3 12.8 112 ----- ----- Basin Index (%) 105 107 TONGUE RIVER Big Goose 7990 5.4 5.7 95 17.4 16.3 107 Bone Springs Div 9350 16.2 15.1 107 16.8 19.5 86 Burgess Junction 7880 7.4 8.2 90 17.5 16.5 106 Dome Lake 8880 -M 7.6 * 18.8 19.5 96 Little Goose 8870 9.5 7.4 128 20.5 17.6 116 Sucker Creek 8880 9.2 8.6 107 22.0 20.6 107 Tie Creek 6870 -M .0 * 17.2 16.4 105 ----- ----- Basin Index (%) 106 103 BELLE FOURCHE Blind Park 6890 .0 .0 * 12.5 14.8 84 Cole Canyon 5910 .0 .0 * 13.2 14.0 94 North Rapid Creek 6130 -M .0 * 12.6 12.7 99 ----- ----- Basin Index (%) * 92 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 12.5 14.8 84 North Rapid Creek 6130 -M .0 * 12.6 12.7 99 ----- ----- Basin Index (%) * 91 UPPER N. PLATTE Arapaho Ridge 10976 -M 19.3 * -M 28.2 * Blackhall Mtn 9839 33.9 27.5 123 41.8 39.2 107 Cinnabar Park 9707 14.5 14.0 104 27.7 27.9 99 Columbine 9167 7.2 3.8 189 31.1 31.0 100 Divide Peak 8730 9.3 6.4 145 29.6 25.8 115 Joe Wright 10158 21.0 20.2 104 31.9 33.1 96 Laprele Creek 8390 .6 .0 * 17.3 16.4 105 Med Bow 10512 42.6 -M * 40.4 -M * Never Summer 10323 24.0 20.4 118 20.8 21.9 95 North French Creek 10153 27.9 30.8 91 34.1 35.7 96 Old Battle 9860 34.7 34.0 102 40.5 41.6 97 Rawah 9069 5.1 .2 2550* 21.2 20.2 105 Sage Creek Basin 7850 -M .0 * 19.1 16.4 116 Sand Lake 10098 35.9 29.0 124 37.0 31.6 117 South Brush Creek 8495 .2 .0 * 16.3 19.0 86 Tower 10620 45.1 45.4 99 48.5 49.0 99 Webber Springs 9260 18.3 11.9 154 31.0 32.0 97 Whiskey Park 9020 28.8 23.2 124 35.3 35.5 99 Willow Creek Pass 9523 12.7 11.0 115 18.8 17.6 107 Zirkel 9338 9.9 10.2 97 34.9 35.6 98 ----- ----- Basin Index (%) 114 101 SWEETWATER Deer Park 9700 17.8 11.4 156 26.9 23.5 114 Larsen Creek 9000 -M .0 * 16.7 16.6 101 South Pass 9040 13.1 9.2 142 23.5 20.2 116 ----- ----- Basin Index (%) 150 111 LOWER N. PLATTE Casper Mtn. 7920 7.2 3.8 189 22.4 18.8 119 Laprele Creek 8390 .6 .0 * 17.3 16.4 105 Reno Hill 8430 9.6 7.9 122 22.2 21.6 103 Windy Peak 7915 .3 .0 * 15.2 14.4 106 ----- ----- Basin Index (%) 151 108 LARAMIE RIVER Brooklyn Lake 10250 20.3 18.0 113 31.5 27.5 115 Cinnabar Park 9707 14.5 14.0 104 27.7 27.9 99 Crow Creek 8335 .0 .0 * 13.0 14.0 93 Deadman Hill 10239 20.3 17.3 117 23.9 23.8 100 Rawah 9069 5.1 .2 2550* 21.2 20.2 105 Roach 9740 9.6 10.4 92 22.0 24.2 91 Windy Peak 7915 .3 .0 * 15.2 14.4 106 ----- ----- Basin Index (%) 117 102 S. PLATTE Crow Creek 8335 .0 .0 * 13.0 14.0 93 ----- ----- Basin Index (%) * 93 LITTLE SNAKE RIVER Battle Mountain 7498 .1 .0 * 22.2 18.6 119 Divide Peak 8730 9.3 6.4 145 29.6 25.8 115 Elk River 8739 .1 .2 50* 23.5 23.7 99 Elkhead Divide 8800 9.8 -M * 28.0 -M * Little Snake River 8928 18.8 13.1 144 39.7 39.4 101 Old Battle 9860 34.7 34.0 102 40.5 41.6 97 Sage Creek Basin 7850 -M .0 * 19.1 16.4 116 Sandstone RS 8152 .1 .0 * 22.1 21.6 102 Whiskey Park 9020 28.8 23.2 124 35.3 35.5 99 ----- ----- Basin Index (%) 120 104 UPPER GREEN RIVER Big Sandy Opening 9080 5.1 5.6 91 17.4 16.0 109 Blind Bull Sum 8650 28.7 22.5 128 19.8 20.8 95 East Rim Divide 7930 -M .0 * 13.5 13.9 97 Elkhart Park G.S. 9400 2.9 6.8 43 14.3 16.0 89 Gros Ventre Summit 8750 4.4 6.8 65 -M 15.4 * Gunsight Pass 9820 9.5 11.0 86 18.1 17.4 104 Indian Creek 9425 18.6 20.0 93 24.1 23.8 101 Kendall R.S. 7740 .0 .0 * 15.5 16.0 97 Larsen Creek 9000 -M .0 * 16.7 16.6 101 Loomis Park 8240 .4 3.9 10 18.1 20.5 88 New Fork Lake 8340 -M .0 * -M 13.7 * Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 -M .0 * 16.3 16.1 101 Spring Creek Divide 9000 21.8 21.1 103 26.1 27.6 95 Triple Peak 8500 12.8 12.0 107 29.9 30.3 99 ----- ----- Basin Index (%) 95 98 LOWER GREEN RIVER Blacks Fork Jct 8869 .5 .0 * 17.3 15.1 115 Buck Pasture 9632 8.4 -M * 21.3 -M * EF Blacks Fork GS 9360 1.8 .0 * 14.0 15.1 93 Hams Fork 7840 -M .0 * 14.0 14.0 100 Henrys Fork 10182 -M -M * 17.8 -M * Hewinta 9500 -M .0 * 18.6 17.1 109 Hickerson Park 9122 -M .0 * 16.5 13.2 125 Hole-in-Rock 9168 -M .0 * 14.2 13.4 106 Indian Creek 9425 18.6 20.0 93 24.1 23.8 101 Kelley R.S. 8180 4.7 2.9 162 21.0 20.0 105 Spirit Lk 10235 8.8 4.3 205 23.0 20.2 114 Steel Creek Park 10158 16.1 15.1 107 22.7 21.0 108 ----- ----- Basin Index (%) 119* 107 UPPER BEAR RIVER Bear River RS 8777 -M .0 * 17.3 14.4 120 Bug Lake 7987 7.3 7.2 101 26.4 20.2 131 Burts Miller Ranch 8000 .2 .0 * 14.4 9.4 153 Chalk Creek #1 9171 -M 14.4 * -M 28.5 * Giveout 6930 -M .0 * 15.2 15.3 99 Hayden Fork 9130 .2 .0 * 27.8 24.8 112 Kelley R.S. 8180 4.7 2.9 162 21.0 20.0 105 Lily Lake 9133 4.3 .0 * 19.2 20.2 95 Monte Cristo 8932 22.1 16.7 132 34.1 29.8 114 Salt River Summit 7640 -M .0 * 16.8 18.9 89 Spring Creek Divide 9000 21.8 21.1 103 26.1 27.6 95 Trial Lake 9992 23.0 17.3 133 31.4 27.0 116 ----- ----- Basin Index (%) 128* 110 ----------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. Units = inches for the Current and Median (or Average) 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 (or Average) represents the snow water equivalent found at selected SNOTEL sites in or near the basin compared to the Median (or Average) value for those sites on this day. The TOTAL PRECIPITATION Percent of Median (or Average) represents the total precipitation (beginning October 1st) found at selected SNOTEL sites in or near the basin compared to the Median (or Average) value for those sites on this day. Contact your state water supply staff for assistance. Medians and averages are calculated for the period 1991-2020. 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 or average for the day is less than 10% of the maximum median or average value for the year. * Basin - More than half of the stations for a basin with medians (or averages) report missing or invalid data The basin index is calculated as the sum of the valid current values divided by the sum of the corresponding medians or averages 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.