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 11 , 2024 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 6.1 4.9 124 23.4 23.6 99 Blind Bull Sum 8650 27.4 24.2 113 19.6 20.2 97 Cottonwood Creek 7670 14.6 14.6 100 30.5 29.6 103 East Rim Divide 7930 -M .6 * 13.3 13.3 100 Grand Targhee 9260 46.7 47.0 99 35.8 37.2 96 Granite Creek 6770 5.9 5.0 118 19.2 21.4 90 Grassy Lake 7265 21.9 21.8 100 38.2 39.8 96 Gros Ventre Summit 8750 8.4 9.5 88 -M 15.0 * Gunsight Pass 9820 12.5 12.4 101 17.7 17.2 103 Lewis Lake Divide 7850 25.5 29.8 86 38.8 38.8 100 Loomis Park 8240 5.7 7.0 81 18.0 19.8 91 Phillips Bench 8200 25.2 23.5 107 33.5 30.1 111 Salt River Summit 7640 5.8 4.0 145 16.6 18.8 88 Snake River Station 6920 4.6 2.4 192 24.9 26.0 96 Somsen Ranch 6800 4.4 .0 * 23.6 19.2 123 Spring Creek Divide 9000 25.2 24.0 105 25.9 27.0 96 Thumb Divide 7980 10.8 7.4 146 20.5 22.2 92 Togwotee Pass 9580 22.5 25.8 87 24.5 28.6 86 Triple Peak 8500 19.1 16.3 117 29.9 29.6 101 Two Ocean Plateau 9240 31.3 33.3 94 30.3 30.5 99 Willow Creek 8080 28.6 22.7 126 40.2 39.3 102 Younts Peak 8350 8.8 12.5 70 17.8 17.8 100 ----- ----- Basin Index (%) 104 99 MADISON HEADWATERS IN WYOMING Black Bear 8170 33.5 40.8 82 41.6 41.6 100 Canyon 7870 8.1 -M * 15.7 -M * Madison Plateau 7750 17.9 21.6 83 25.8 30.0 86 West Yellowstone 6700 -M .0 * 14.8 16.2 91 Whiskey Creek 6800 8.3 10.0 83 21.6 23.4 92 ----- ----- Basin Index (%) 82 93 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 20.6 25.0 82 20.7 24.6 84 Canyon 7870 8.1 -M * 15.7 -M * Evening Star 9200 21.1 26.4 80 30.7 33.2 92 Fisher Creek 9100 26.2 36.2 72 31.7 39.2 81 Monument Peak 8850 17.4 21.4 81 23.9 26.6 90 Northeast Entrance 7350 .0 .0 * 13.8 15.1 91 Parker Peak 9400 23.1 23.5 98 26.7 23.4 114 Sylvan Lake 8420 13.0 17.4 75 26.8 27.4 98 Thumb Divide 7980 10.8 7.4 146 20.5 22.2 92 Two Ocean Plateau 9240 31.3 33.3 94 30.3 30.5 99 White Mill 8700 20.0 26.6 75 22.1 26.4 84 Wolverine 7650 .0 .0 * 16.0 14.6 110 ----- ----- Basin Index (%) 84 93 WIND RIVER Burroughs Creek 8750 6.0 -M * 14.0 -M * Castle Creek 8400 .1 .0 * 10.0 10.8 93 Cold Springs 9630 3.9 2.2 177 14.8 12.6 117 Deer Park 9700 20.6 14.0 147 26.7 23.0 116 Hobbs Park 10100 22.0 15.6 141 23.7 17.8 133 Kirwin 9550 15.1 11.6 130 19.8 15.8 125 Little Warm 9370 9.2 7.2 128 17.2 14.4 119 South Pass 9040 16.5 12.7 130 23.3 19.3 121 St. Lawrence Alt 8620 .8 -M * 14.6 -M * Togwotee Pass 9580 22.5 25.8 87 24.5 28.6 86 Townsend Creek 8700 11.0 5.0 220 19.6 15.5 126 ----- ----- Basin Index (%) 128 114 BIGHORN BASIN Bald Mtn. 9380 19.7 21.1 93 17.8 19.8 90 Bear Trap Meadow 8200 .9 .4 225* 12.2 12.2 100 Bone Springs Div 9350 18.1 17.6 103 16.4 18.8 87 Grave Springs 8550 5.5 6.4 86 13.0 12.7 102 Kirwin 9550 15.1 11.6 130 19.8 15.8 125 Marquette 8760 17.4 8.4 207 22.1 13.3 166 Middle Powder 7760 13.4 9.3 144 13.8 13.3 104 Owl Creek 8975 .0 .8 0 11.8 9.2 128 Powder River Pass 9480 6.0 8.9 67 15.8 16.8 94 Shell Creek 9580 17.9 16.6 108 18.5 17.2 108 Timber Creek 7950 4.3 1.3 331 16.5 11.4 145 ----- ----- Basin Index (%) 116 111 SHOSHONE RIVER Blackwater 9780 25.7 24.8 104 28.1 26.8 105 Evening Star 9200 21.1 26.4 80 30.7 33.2 92 Marquette 8760 17.4 8.4 207 22.1 13.3 166 Sylvan Lake 8420 13.0 17.4 75 26.8 27.4 98 Sylvan Road 7120 -M .0 * 17.1 19.0 90 Younts Peak 8350 8.8 12.5 70 17.8 17.8 100 ----- ----- Basin Index (%) 96 104 POWDER RIVER Bear Trap Meadow 8200 .9 .4 225* 12.2 12.2 100 Cloud Peak Reservoir 9860 16.5 16.0 103 20.7 18.4 112 Grave Springs 8550 5.5 6.4 86 13.0 12.7 102 Hansen Sawmill 8360 1.4 1.2 117 13.4 12.2 110 Middle Powder 7760 13.4 9.3 144 13.8 13.3 104 Powder River Pass 9480 6.0 8.9 67 15.8 16.8 94 Soldier Park 8720 1.2 .8 150 13.7 12.0 114 ----- ----- Basin Index (%) 104 105 TONGUE RIVER Big Goose 7990 8.6 8.5 101 16.7 15.0 111 Bone Springs Div 9350 18.1 17.6 103 16.4 18.8 87 Burgess Junction 7880 10.8 10.8 100 17.0 16.0 106 Dome Lake 8880 -M 11.0 * 17.8 17.6 101 Little Goose 8870 12.1 9.4 129 19.6 16.6 118 Sucker Creek 8880 12.0 12.5 96 21.2 19.1 111 Tie Creek 6870 1.2 .4 300* 16.5 15.6 106 ----- ----- Basin Index (%) 106 105 BELLE FOURCHE Blind Park 6890 1.0 .0 * 11.8 14.2 83 Cole Canyon 5910 .8 .0 * 12.0 13.4 90 North Rapid Creek 6130 -M .0 * 11.9 12.2 98 ----- ----- Basin Index (%) * 90 CHEYENNE RIVER BASIN Blind Park 6890 1.0 .0 * 11.8 14.2 83 North Rapid Creek 6130 -M .0 * 11.9 12.2 98 ----- ----- Basin Index (%) * 90 UPPER N. PLATTE Arapaho Ridge 10976 23.9 22.2 108 27.2 26.8 101 Blackhall Mtn 9839 37.4 33.2 113 41.8 37.5 111 Cinnabar Park 9707 19.3 17.6 110 27.6 27.8 99 Columbine 9167 14.9 12.0 124 30.9 30.4 102 Divide Peak 8730 16.9 11.2 151 29.5 25.4 116 Joe Wright 10158 23.7 22.4 106 31.5 32.1 98 Laprele Creek 8390 4.8 .7 686* 17.0 15.8 108 Med Bow 10512 44.9 -M * 40.1 -M * Never Summer 10323 25.2 22.0 115 20.5 21.0 98 North French Creek 10153 31.6 32.5 97 33.8 35.0 97 Old Battle 9860 36.7 37.2 99 40.2 41.0 98 Rawah 9069 10.1 2.8 361 21.2 20.2 105 Sage Creek Basin 7850 .0 .0 * 18.9 15.7 120 Sand Lake 10098 37.0 32.1 115 36.7 31.5 117 South Brush Creek 8495 5.4 1.4 386 16.0 17.8 90 Tower 10620 47.8 48.0 100 48.2 47.6 101 Webber Springs 9260 21.4 18.0 119 30.7 31.4 98 Whiskey Park 9020 28.9 26.6 109 35.2 35.2 100 Willow Creek Pass 9523 16.1 14.0 115 18.7 16.8 111 Zirkel 9338 17.6 19.1 92 34.5 35.4 97 ----- ----- Basin Index (%) 112 103 SWEETWATER Deer Park 9700 20.6 14.0 147 26.7 23.0 116 Larsen Creek 9000 -M .0 * 16.7 16.5 101 South Pass 9040 16.5 12.7 130 23.3 19.3 121 ----- ----- Basin Index (%) 139 113 LOWER N. PLATTE Casper Mtn. 7920 11.5 9.8 117 21.4 18.2 118 Laprele Creek 8390 4.8 .7 686* 17.0 15.8 108 Reno Hill 8430 11.9 10.4 114 21.6 21.2 102 Windy Peak 7915 5.6 .3 1867* 15.0 14.2 106 ----- ----- Basin Index (%) 159 108 LARAMIE RIVER Brooklyn Lake 10250 24.4 21.0 116 31.4 27.1 116 Cinnabar Park 9707 19.3 17.6 110 27.6 27.8 99 Crow Creek 8335 .0 .0 * 13.0 13.7 95 Deadman Hill 10239 23.7 18.5 128 23.6 23.2 102 Rawah 9069 10.1 2.8 361 21.2 20.2 105 Roach 9740 13.8 15.2 91 21.8 22.6 96 Windy Peak 7915 5.6 .3 1867* 15.0 14.2 106 ----- ----- Basin Index (%) 129 103 S. PLATTE Crow Creek 8335 .0 .0 * 13.0 13.7 95 ----- ----- Basin Index (%) * 95 LITTLE SNAKE RIVER Battle Mountain 7498 .0 .0 * 22.1 18.2 121 Divide Peak 8730 16.9 11.2 151 29.5 25.4 116 Elk River 8739 7.7 5.8 133 23.5 23.5 100 Elkhead Divide 8800 16.2 -M * 27.9 -M * Little Snake River 8928 25.1 21.2 118 39.5 38.4 103 Old Battle 9860 36.7 37.2 99 40.2 41.0 98 Sage Creek Basin 7850 .0 .0 * 18.9 15.7 120 Sandstone RS 8152 6.1 .6 1017* 21.9 20.6 106 Whiskey Park 9020 28.9 26.6 109 35.2 35.2 100 ----- ----- Basin Index (%) 118 106 UPPER GREEN RIVER Big Sandy Opening 9080 10.7 9.3 115 17.4 15.8 110 Blind Bull Sum 8650 27.4 24.2 113 19.6 20.2 97 East Rim Divide 7930 -M .6 * 13.3 13.3 100 Elkhart Park G.S. 9400 8.3 9.6 86 14.4 15.1 95 Gros Ventre Summit 8750 8.4 9.5 88 -M 15.0 * Gunsight Pass 9820 12.5 12.4 101 17.7 17.2 103 Indian Creek 9425 23.9 21.0 114 24.0 23.2 103 Kendall R.S. 7740 .0 .0 * 15.3 15.4 99 Larsen Creek 9000 -M .0 * 16.7 16.5 101 Loomis Park 8240 5.7 7.0 81 18.0 19.8 91 New Fork Lake 8340 -M 2.8 * -M 12.9 * Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 2.2 4.2 52 16.0 15.8 101 Spring Creek Divide 9000 25.2 24.0 105 25.9 27.0 96 Triple Peak 8500 19.1 16.3 117 29.9 29.6 101 ----- ----- Basin Index (%) 104 100 LOWER GREEN RIVER Blacks Fork Jct 8869 2.3 .0 * 17.1 15.0 114 Buck Pasture 9632 12.5 -M * 21.0 -M * EF Blacks Fork GS 9360 5.4 3.8 142 13.7 14.4 95 Hams Fork 7840 -M .0 * 13.8 13.6 101 Henrys Fork 10182 -M -M * 17.7 -M * Hewinta 9500 5.8 .5 1160* 18.4 16.6 111 Hickerson Park 9122 1.0 .1 1000* 16.6 13.0 128 Hole-in-Rock 9168 .7 .0 * 14.1 12.8 110 Indian Creek 9425 23.9 21.0 114 24.0 23.2 103 Kelley R.S. 8180 11.0 8.3 133 20.8 19.2 108 Spirit Lk 10235 11.6 10.0 116 23.1 20.0 116 Steel Creek Park 10158 17.9 18.1 99 22.4 20.1 111 ----- ----- Basin Index (%) 129 110 UPPER BEAR RIVER Bear River RS 8777 .4 .0 * 17.2 14.3 120 Bug Lake 7987 14.6 12.2 120 26.3 20.0 132 Burts Miller Ranch 8000 .2 .0 * 14.2 8.8 161 Chalk Creek #1 9171 20.4 19.5 105 29.4 27.3 108 Giveout 6930 -M .0 * 14.7 15.0 98 Hayden Fork 9130 6.2 4.4 141 27.6 24.3 114 Kelley R.S. 8180 11.0 8.3 133 20.8 19.2 108 Lily Lake 9133 9.4 5.6 168 19.2 19.8 97 Monte Cristo 8932 28.4 20.9 136 34.1 29.2 117 Salt River Summit 7640 5.8 4.0 145 16.6 18.8 88 Spring Creek Divide 9000 25.2 24.0 105 25.9 27.0 96 Trial Lake 9992 28.6 20.8 138 31.4 26.5 118 ----- ----- Basin Index (%) 125 111 ----------------------------------------------------------------------------- -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.