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 SUNDAY: MAY 12 , 2024 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 5.2 4.2 124 23.4 23.6 99 Blind Bull Sum 8650 27.2 24.2 112 19.6 20.4 96 Cottonwood Creek 7670 13.7 14.0 98 31.2 29.8 105 East Rim Divide 7930 -M .6 * 13.4 13.6 99 Grand Targhee 9260 44.7 46.8 96 35.8 37.2 96 Granite Creek 6770 4.8 4.5 107 19.2 21.4 90 Grassy Lake 7265 20.9 21.4 98 38.2 39.8 96 Gros Ventre Summit 8750 7.7 9.4 82 -M 15.1 * Gunsight Pass 9820 11.9 12.3 97 17.7 17.3 102 Lewis Lake Divide 7850 24.6 29.1 85 38.8 38.8 100 Loomis Park 8240 5.1 6.8 75 17.9 19.9 90 Phillips Bench 8200 24.8 23.1 107 33.4 30.2 111 Salt River Summit 7640 4.6 3.3 139 16.8 18.8 89 Snake River Station 6920 3.1 1.6 194* 25.0 26.0 96 Somsen Ranch 6800 2.8 .0 * 23.6 19.2 123 Spring Creek Divide 9000 25.4 23.7 107 25.9 27.0 96 Thumb Divide 7980 9.8 6.8 144 20.5 22.2 92 Togwotee Pass 9580 21.8 25.8 84 24.5 28.8 85 Triple Peak 8500 18.5 16.4 113 29.9 29.8 100 Two Ocean Plateau 9240 30.9 33.0 94 30.3 30.6 99 Willow Creek 8080 27.9 22.4 125 40.2 39.4 102 Younts Peak 8350 7.9 12.5 63 17.9 18.0 99 ----- ----- Basin Index (%) 101 98 MADISON HEADWATERS IN WYOMING Black Bear 8170 32.9 40.5 81 41.6 42.0 99 Canyon 7870 7.3 -M * 15.7 -M * Madison Plateau 7750 17.2 21.2 81 25.8 30.1 86 West Yellowstone 6700 -M .0 * 14.8 16.3 91 Whiskey Creek 6800 7.9 9.4 84 21.6 23.4 92 ----- ----- Basin Index (%) 82 93 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 20.3 24.2 84 20.7 24.6 84 Canyon 7870 7.3 -M * 15.7 -M * Evening Star 9200 20.1 26.5 76 30.7 33.2 92 Fisher Creek 9100 25.7 36.2 71 31.7 39.4 80 Monument Peak 8850 17.0 21.1 81 23.9 26.6 90 Northeast Entrance 7350 .0 .0 * 13.8 15.2 91 Parker Peak 9400 22.7 23.2 98 26.7 23.4 114 Sylvan Lake 8420 12.5 17.0 74 26.8 27.4 98 Thumb Divide 7980 9.8 6.8 144 20.5 22.2 92 Two Ocean Plateau 9240 30.9 33.0 94 30.3 30.6 99 White Mill 8700 19.7 26.6 74 22.1 26.5 83 Wolverine 7650 .0 .0 * 15.9 14.8 107 ----- ----- Basin Index (%) 83 93 WIND RIVER Burroughs Creek 8750 5.4 -M * 13.9 -M * Castle Creek 8400 .1 .0 * 10.0 10.8 93 Cold Springs 9630 3.1 2.0 155 14.8 13.0 114 Deer Park 9700 20.3 14.3 142 26.7 23.2 115 Hobbs Park 10100 21.8 16.0 136 23.8 18.2 131 Kirwin 9550 14.7 11.6 127 19.8 16.0 124 Little Warm 9370 8.6 7.4 116 17.3 14.8 117 South Pass 9040 16.1 13.2 122 23.2 19.5 119 St. Lawrence Alt 8620 .0 -M * 14.6 -M * Togwotee Pass 9580 21.8 25.8 84 24.5 28.8 85 Townsend Creek 8700 10.6 4.1 259 19.5 15.5 126 ----- ----- Basin Index (%) 124 112 BIGHORN BASIN Bald Mtn. 9380 19.4 21.2 92 17.8 19.8 90 Bear Trap Meadow 8200 -M .2 * 12.2 12.4 98 Bone Springs Div 9350 17.8 17.6 101 16.4 18.9 87 Grave Springs 8550 5.0 6.4 78 12.9 12.8 101 Kirwin 9550 14.7 11.6 127 19.8 16.0 124 Marquette 8760 17.0 8.3 205 22.1 14.0 158 Middle Powder 7760 13.0 8.8 148 13.9 13.4 104 Owl Creek 8975 -M .5 * 11.9 9.4 127 Powder River Pass 9480 5.7 9.0 63 15.9 16.8 95 Shell Creek 9580 17.5 16.7 105 18.5 17.3 107 Timber Creek 7950 3.9 1.0 390 16.6 11.7 142 ----- ----- Basin Index (%) 113 110 SHOSHONE RIVER Blackwater 9780 25.2 24.0 105 28.2 26.8 105 Evening Star 9200 20.1 26.5 76 30.7 33.2 92 Marquette 8760 17.0 8.3 205 22.1 14.0 158 Sylvan Lake 8420 12.5 17.0 74 26.8 27.4 98 Sylvan Road 7120 -M .0 * 17.2 19.1 90 Younts Peak 8350 7.9 12.5 63 17.9 18.0 99 ----- ----- Basin Index (%) 94 103 POWDER RIVER Bear Trap Meadow 8200 -M .2 * 12.2 12.4 98 Cloud Peak Reservoir 9860 16.3 16.0 102 20.7 18.8 110 Grave Springs 8550 5.0 6.4 78 12.9 12.8 101 Hansen Sawmill 8360 .3 1.4 21 13.6 12.3 111 Middle Powder 7760 13.0 8.8 148 13.9 13.4 104 Powder River Pass 9480 5.7 9.0 63 15.9 16.8 95 Soldier Park 8720 .4 .7 57* 13.7 12.0 114 ----- ----- Basin Index (%) 96 104 TONGUE RIVER Big Goose 7990 8.2 8.2 100 16.6 15.7 106 Bone Springs Div 9350 17.8 17.6 101 16.4 18.9 87 Burgess Junction 7880 10.4 10.4 100 16.9 16.0 106 Dome Lake 8880 -M 10.6 * 17.8 18.2 98 Little Goose 8870 11.6 9.4 123 19.6 16.9 116 Sucker Creek 8880 11.6 12.2 95 21.2 19.1 111 Tie Creek 6870 .4 .2 200* 16.5 15.8 104 ----- ----- Basin Index (%) 103 104 BELLE FOURCHE Blind Park 6890 .2 .0 * 11.8 14.4 82 Cole Canyon 5910 .1 .0 * 11.9 13.6 88 North Rapid Creek 6130 -M .0 * 11.8 12.2 97 ----- ----- Basin Index (%) * 88 CHEYENNE RIVER BASIN Blind Park 6890 .2 .0 * 11.8 14.4 82 North Rapid Creek 6130 -M .0 * 11.8 12.2 97 ----- ----- Basin Index (%) * 89 UPPER N. PLATTE Arapaho Ridge 10976 23.9 22.4 107 27.2 27.1 100 Blackhall Mtn 9839 37.2 33.3 112 41.8 38.3 109 Cinnabar Park 9707 18.7 16.6 113 27.6 27.8 99 Columbine 9167 14.3 10.8 132 30.9 30.4 102 Divide Peak 8730 16.5 12.6 131 29.5 25.6 115 Joe Wright 10158 23.7 22.4 106 31.6 32.4 98 Laprele Creek 8390 4.3 .9 478* 17.0 16.0 106 Med Bow 10512 44.7 -M * 40.1 -M * Never Summer 10323 25.0 22.2 113 20.6 21.5 96 North French Creek 10153 31.4 32.3 97 33.8 35.1 96 Old Battle 9860 36.6 37.2 98 40.2 41.2 98 Rawah 9069 9.6 3.2 300 21.1 20.2 104 Sage Creek Basin 7850 -M .0 * 18.9 16.1 117 Sand Lake 10098 37.0 32.1 115 36.7 31.5 117 South Brush Creek 8495 4.4 .7 629* 16.1 18.6 87 Tower 10620 47.7 48.4 99 48.3 47.8 101 Webber Springs 9260 21.2 17.4 122 30.8 31.6 97 Whiskey Park 9020 28.6 26.0 110 35.2 35.2 100 Willow Creek Pass 9523 15.7 13.6 115 18.7 16.8 111 Zirkel 9338 17.2 18.8 91 34.6 35.6 97 ----- ----- Basin Index (%) 111 102 SWEETWATER Deer Park 9700 20.3 14.3 142 26.7 23.2 115 Larsen Creek 9000 -M .2 * 16.7 16.5 101 South Pass 9040 16.1 13.2 122 23.2 19.5 119 ----- ----- Basin Index (%) 132 112 LOWER N. PLATTE Casper Mtn. 7920 11.1 9.7 114 21.6 18.3 118 Laprele Creek 8390 4.3 .9 478* 17.0 16.0 106 Reno Hill 8430 11.6 9.4 123 21.6 21.2 102 Windy Peak 7915 5.1 .0 * 15.0 14.3 105 ----- ----- Basin Index (%) 160 108 LARAMIE RIVER Brooklyn Lake 10250 24.3 20.8 117 31.4 27.2 115 Cinnabar Park 9707 18.7 16.6 113 27.6 27.8 99 Crow Creek 8335 .0 .0 * 13.0 13.8 94 Deadman Hill 10239 23.3 18.5 126 23.7 23.2 102 Rawah 9069 9.6 3.2 300 21.1 20.2 104 Roach 9740 13.5 14.6 92 21.8 22.8 96 Windy Peak 7915 5.1 .0 * 15.0 14.3 105 ----- ----- Basin Index (%) 128 103 S. PLATTE Crow Creek 8335 .0 .0 * 13.0 13.8 94 ----- ----- Basin Index (%) * 94 LITTLE SNAKE RIVER Battle Mountain 7498 .0 .0 * 22.1 18.4 120 Divide Peak 8730 16.5 12.6 131 29.5 25.6 115 Elk River 8739 6.6 5.0 132 23.5 23.5 100 Elkhead Divide 8800 15.8 -M * 27.9 -M * Little Snake River 8928 24.6 20.6 119 39.6 39.0 102 Old Battle 9860 36.6 37.2 98 40.2 41.2 98 Sage Creek Basin 7850 -M .0 * 18.9 16.1 117 Sandstone RS 8152 5.9 .6 983* 21.9 20.7 106 Whiskey Park 9020 28.6 26.0 110 35.2 35.2 100 ----- ----- Basin Index (%) 116 105 UPPER GREEN RIVER Big Sandy Opening 9080 10.2 9.2 111 17.4 15.8 110 Blind Bull Sum 8650 27.2 24.2 112 19.6 20.4 96 East Rim Divide 7930 -M .6 * 13.4 13.6 99 Elkhart Park G.S. 9400 7.7 9.4 82 14.4 15.1 95 Gros Ventre Summit 8750 7.7 9.4 82 -M 15.1 * Gunsight Pass 9820 11.9 12.3 97 17.7 17.3 102 Indian Creek 9425 23.5 21.2 111 24.0 23.2 103 Kendall R.S. 7740 .0 .0 * 15.2 15.6 97 Larsen Creek 9000 -M .2 * 16.7 16.5 101 Loomis Park 8240 5.1 6.8 75 17.9 19.9 90 New Fork Lake 8340 -M 2.7 * -M 13.0 * Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 1.1 3.5 31 16.0 16.0 100 Spring Creek Divide 9000 25.4 23.7 107 25.9 27.0 96 Triple Peak 8500 18.5 16.4 113 29.9 29.8 100 ----- ----- Basin Index (%) 102 99 LOWER GREEN RIVER Blacks Fork Jct 8869 1.9 .0 * 17.1 15.1 113 Buck Pasture 9632 12.4 -M * 21.0 -M * EF Blacks Fork GS 9360 5.0 3.0 167 13.7 14.4 95 Hams Fork 7840 -M .0 * 13.8 13.8 100 Henrys Fork 10182 -M -M * 17.5 -M * Hewinta 9500 5.2 1.0 520* 18.4 17.0 108 Hickerson Park 9122 .1 .2 50* 16.5 13.0 127 Hole-in-Rock 9168 .3 .0 * 14.1 13.1 108 Indian Creek 9425 23.5 21.2 111 24.0 23.2 103 Kelley R.S. 8180 10.0 8.0 125 20.8 19.3 108 Spirit Lk 10235 11.5 9.6 120 23.0 20.0 115 Steel Creek Park 10158 17.9 17.8 101 22.5 20.6 109 ----- ----- Basin Index (%) 124 108 UPPER BEAR RIVER Bear River RS 8777 .0 .0 * 17.2 14.4 119 Bug Lake 7987 13.7 12.1 113 26.3 20.0 132 Burts Miller Ranch 8000 .2 .0 * 14.3 8.8 162 Chalk Creek #1 9171 20.2 19.4 104 29.5 27.7 106 Giveout 6930 -M .0 * 14.8 15.0 99 Hayden Fork 9130 5.7 3.8 150 27.7 24.3 114 Kelley R.S. 8180 10.0 8.0 125 20.8 19.3 108 Lily Lake 9133 9.1 5.0 182 19.2 19.8 97 Monte Cristo 8932 28.3 20.8 136 34.1 29.4 116 Salt River Summit 7640 4.6 3.3 139 16.8 18.8 89 Spring Creek Divide 9000 25.4 23.7 107 25.9 27.0 96 Trial Lake 9992 28.4 20.9 136 31.4 26.5 118 ----- ----- Basin Index (%) 124 111 ----------------------------------------------------------------------------- -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.