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 15 , 2024 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 2.6 2.4 108 24.0 24.2 99 Blind Bull Sum 8650 27.3 23.7 115 19.8 20.6 96 Cottonwood Creek 7670 11.5 10.8 106 31.4 30.0 105 East Rim Divide 7930 .0 .0 * 13.5 13.7 99 Grand Targhee 9260 40.9 45.2 90 36.7 37.3 98 Granite Creek 6770 2.3 2.8 82 19.6 21.8 90 Grassy Lake 7265 18.0 19.7 91 38.4 40.2 96 Gros Ventre Summit 8750 6.4 8.7 74 -M 15.2 * Gunsight Pass 9820 11.0 11.8 93 18.1 17.4 104 Lewis Lake Divide 7850 21.9 25.2 87 39.2 39.1 100 Loomis Park 8240 3.1 5.8 53 18.1 20.2 90 Phillips Bench 8200 23.2 22.0 105 33.8 30.6 110 Salt River Summit 7640 1.9 .6 317* 16.7 18.9 88 Snake River Station 6920 .0 .0 * 25.3 26.3 96 Somsen Ranch 6800 -M .0 * 23.9 19.4 123 Spring Creek Divide 9000 23.5 22.8 103 26.1 27.4 95 Thumb Divide 7980 7.5 5.2 144 20.8 22.2 94 Togwotee Pass 9580 21.3 24.0 89 25.0 28.8 87 Triple Peak 8500 15.9 14.8 107 30.0 30.0 100 Two Ocean Plateau 9240 29.7 32.3 92 30.8 31.0 99 Willow Creek 8080 23.6 20.6 115 40.4 40.0 101 Younts Peak 8350 4.5 10.4 43 18.2 18.0 101 ----- ----- Basin Index (%) 96 99 MADISON HEADWATERS IN WYOMING Black Bear 8170 30.8 38.2 81 41.9 42.2 99 Canyon 7870 5.3 -M * 15.8 -M * Madison Plateau 7750 15.1 18.9 80 25.9 30.6 85 West Yellowstone 6700 -M .0 * 15.1 16.4 92 Whiskey Creek 6800 5.9 8.4 70 21.8 24.2 90 ----- ----- Basin Index (%) 79 92 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 19.9 24.0 83 20.9 24.8 84 Canyon 7870 5.3 -M * 15.8 -M * Evening Star 9200 19.0 25.5 75 30.9 33.6 92 Fisher Creek 9100 24.6 36.4 68 32.0 40.6 79 Monument Peak 8850 15.7 20.0 78 24.2 27.0 90 Northeast Entrance 7350 .0 .0 * 14.2 15.6 91 Parker Peak 9400 21.7 22.0 99 27.2 23.6 115 Sylvan Lake 8420 11.0 15.6 71 27.4 27.7 99 Thumb Divide 7980 7.5 5.2 144 20.8 22.2 94 Two Ocean Plateau 9240 29.7 32.3 92 30.8 31.0 99 White Mill 8700 18.3 25.4 72 22.3 27.1 82 Wolverine 7650 .0 .0 * 15.9 14.8 107 ----- ----- Basin Index (%) 81 93 WIND RIVER Burroughs Creek 8750 2.9 -M * 13.9 -M * Castle Creek 8400 .1 .0 * 10.2 11.0 93 Cold Springs 9630 .7 .6 117* 14.9 13.4 111 Deer Park 9700 19.3 13.2 146 26.9 23.4 115 Hobbs Park 10100 21.7 16.5 132 24.1 18.6 130 Kirwin 9550 13.0 11.0 118 20.0 16.0 125 Little Warm 9370 7.1 6.4 111 17.6 15.0 117 South Pass 9040 14.9 11.6 128 23.5 19.6 120 St. Lawrence Alt 8620 .0 -M * 14.8 -M * Togwotee Pass 9580 21.3 24.0 89 25.0 28.8 87 Townsend Creek 8700 9.4 2.5 376 19.7 15.6 126 ----- ----- Basin Index (%) 125 113 BIGHORN BASIN Bald Mtn. 9380 19.7 20.4 97 18.8 20.3 93 Bear Trap Meadow 8200 -M .0 * 13.3 12.5 106 Bone Springs Div 9350 17.7 16.4 108 16.9 19.2 88 Grave Springs 8550 5.2 5.2 100 -M 13.1 * Kirwin 9550 13.0 11.0 118 20.0 16.0 125 Marquette 8760 16.2 6.5 249 22.8 14.8 154 Middle Powder 7760 12.0 7.2 167 15.2 13.4 113 Owl Creek 8975 -M .0 * 12.2 9.5 128 Powder River Pass 9480 5.2 8.4 62 16.5 17.0 97 Shell Creek 9580 17.0 16.0 106 18.9 17.4 109 Timber Creek 7950 1.5 .0 * 17.1 12.0 142 ----- ----- Basin Index (%) 118 113 SHOSHONE RIVER Blackwater 9780 24.1 22.8 106 28.3 27.4 103 Evening Star 9200 19.0 25.5 75 30.9 33.6 92 Marquette 8760 16.2 6.5 249 22.8 14.8 154 Sylvan Lake 8420 11.0 15.6 71 27.4 27.7 99 Sylvan Road 7120 .0 .0 * 17.6 19.2 92 Younts Peak 8350 4.5 10.4 43 18.2 18.0 101 ----- ----- Basin Index (%) 93 103 POWDER RIVER Bear Trap Meadow 8200 -M .0 * 13.3 12.5 106 Cloud Peak Reservoir 9860 17.3 15.0 115 22.3 19.3 116 Grave Springs 8550 5.2 5.2 100 -M 13.1 * Hansen Sawmill 8360 -M .0 * 13.9 12.8 109 Middle Powder 7760 12.0 7.2 167 15.2 13.4 113 Powder River Pass 9480 5.2 8.4 62 16.5 17.0 97 Soldier Park 8720 .4 .0 * 14.4 12.1 119 ----- ----- Basin Index (%) 112 110 TONGUE RIVER Big Goose 7990 7.6 6.7 113 17.4 15.8 110 Bone Springs Div 9350 17.7 16.4 108 16.9 19.2 88 Burgess Junction 7880 9.5 9.4 101 17.7 16.4 108 Dome Lake 8880 -M 9.2 * 18.8 18.8 100 Little Goose 8870 11.4 8.8 130 20.5 17.0 121 Sucker Creek 8880 11.3 10.0 113 22.1 19.4 114 Tie Creek 6870 .0 .0 * 17.2 16.0 108 ----- ----- Basin Index (%) 112 107 BELLE FOURCHE Blind Park 6890 .2 .0 * 12.4 14.5 86 Cole Canyon 5910 .1 .0 * 13.2 13.8 96 North Rapid Creek 6130 -M .0 * 12.4 12.5 99 ----- ----- Basin Index (%) * 93 CHEYENNE RIVER BASIN Blind Park 6890 .2 .0 * 12.4 14.5 86 North Rapid Creek 6130 -M .0 * 12.4 12.5 99 ----- ----- Basin Index (%) * 92 UPPER N. PLATTE Arapaho Ridge 10976 23.4 21.0 111 27.4 27.6 99 Blackhall Mtn 9839 36.1 29.7 122 41.8 38.9 107 Cinnabar Park 9707 16.9 15.2 111 27.7 27.9 99 Columbine 9167 11.2 7.6 147 31.1 30.8 101 Divide Peak 8730 13.4 10.0 134 29.6 25.6 116 Joe Wright 10158 23.3 21.0 111 31.9 32.6 98 Laprele Creek 8390 2.6 .0 * 17.0 16.2 105 Med Bow 10512 43.9 -M * 40.3 -M * Never Summer 10323 24.7 21.5 115 20.8 21.8 95 North French Creek 10153 29.7 30.9 96 34.0 35.2 97 Old Battle 9860 36.0 35.6 101 40.4 41.4 98 Rawah 9069 7.5 .8 938* 21.2 20.2 105 Sage Creek Basin 7850 -M .0 * 19.1 16.1 119 Sand Lake 10098 36.7 31.0 118 37.0 31.6 117 South Brush Creek 8495 .5 .2 250* 16.2 18.6 87 Tower 10620 46.7 47.0 99 48.5 48.3 100 Webber Springs 9260 20.2 14.2 142 31.0 32.0 97 Whiskey Park 9020 28.5 24.4 117 35.3 35.2 100 Willow Creek Pass 9523 14.2 12.7 112 18.8 17.1 110 Zirkel 9338 13.4 14.3 94 34.9 35.6 98 ----- ----- Basin Index (%) 114 102 SWEETWATER Deer Park 9700 19.3 13.2 146 26.9 23.4 115 Larsen Creek 9000 -M .0 * 16.8 16.5 102 South Pass 9040 14.9 11.6 128 23.5 19.6 120 ----- ----- Basin Index (%) 138 113 LOWER N. PLATTE Casper Mtn. 7920 9.4 5.8 162 21.7 18.6 117 Laprele Creek 8390 2.6 .0 * 17.0 16.2 105 Reno Hill 8430 10.5 8.1 130 21.7 21.2 102 Windy Peak 7915 2.2 .0 * 15.0 14.3 105 ----- ----- Basin Index (%) 178 107 LARAMIE RIVER Brooklyn Lake 10250 23.0 19.5 118 31.4 27.2 115 Cinnabar Park 9707 16.9 15.2 111 27.7 27.9 99 Crow Creek 8335 .0 .0 * 13.0 14.0 93 Deadman Hill 10239 22.4 17.4 129 23.9 23.5 102 Rawah 9069 7.5 .8 938* 21.2 20.2 105 Roach 9740 11.9 12.7 94 22.0 23.4 94 Windy Peak 7915 2.2 .0 * 15.0 14.3 105 ----- ----- Basin Index (%) 128 102 S. PLATTE Crow Creek 8335 .0 .0 * 13.0 14.0 93 ----- ----- Basin Index (%) * 93 LITTLE SNAKE RIVER Battle Mountain 7498 .0 .0 * 22.2 18.5 120 Divide Peak 8730 13.4 10.0 134 29.6 25.6 116 Elk River 8739 3.2 1.6 200* 23.6 23.5 100 Elkhead Divide 8800 12.8 -M * 28.0 -M * Little Snake River 8928 21.4 16.8 127 39.7 39.2 101 Old Battle 9860 36.0 35.6 101 40.4 41.4 98 Sage Creek Basin 7850 -M .0 * 19.1 16.1 119 Sandstone RS 8152 1.4 .0 * 22.1 21.2 104 Whiskey Park 9020 28.5 24.4 117 35.3 35.2 100 ----- ----- Basin Index (%) 118 105 UPPER GREEN RIVER Big Sandy Opening 9080 7.9 8.5 93 17.5 16.0 109 Blind Bull Sum 8650 27.3 23.7 115 19.8 20.6 96 East Rim Divide 7930 .0 .0 * 13.5 13.7 99 Elkhart Park G.S. 9400 5.5 9.0 61 14.3 15.7 91 Gros Ventre Summit 8750 6.4 8.7 74 -M 15.2 * Gunsight Pass 9820 11.0 11.8 93 18.1 17.4 104 Indian Creek 9425 21.4 21.4 100 24.1 23.6 102 Kendall R.S. 7740 .0 .0 * 15.5 15.8 98 Larsen Creek 9000 -M .0 * 16.8 16.5 102 Loomis Park 8240 3.1 5.8 53 18.1 20.2 90 New Fork Lake 8340 -M .6 * -M 13.4 * Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 -M 1.0 * 16.3 16.1 101 Spring Creek Divide 9000 23.5 22.8 103 26.1 27.4 95 Triple Peak 8500 15.9 14.8 107 30.0 30.0 100 ----- ----- Basin Index (%) 96 99 LOWER GREEN RIVER Blacks Fork Jct 8869 .8 .0 * 17.3 15.1 115 Buck Pasture 9632 11.1 -M * 21.2 -M * EF Blacks Fork GS 9360 3.4 .5 680* 13.9 14.6 95 Hams Fork 7840 -M .0 * 14.0 14.0 100 Henrys Fork 10182 -M -M * 17.9 -M * Hewinta 9500 3.5 .0 * 18.6 17.1 109 Hickerson Park 9122 -M .0 * 16.5 13.0 127 Hole-in-Rock 9168 -M .0 * 14.2 13.2 108 Indian Creek 9425 21.4 21.4 100 24.1 23.6 102 Kelley R.S. 8180 7.9 5.1 155 21.0 19.6 107 Spirit Lk 10235 10.4 6.7 155 23.1 20.0 116 Steel Creek Park 10158 17.4 15.8 110 22.7 20.8 109 ----- ----- Basin Index (%) 131* 108 UPPER BEAR RIVER Bear River RS 8777 -M .0 * 17.3 14.4 120 Bug Lake 7987 10.8 10.6 102 26.3 20.2 130 Burts Miller Ranch 8000 .1 .0 * 14.4 8.8 164 Chalk Creek #1 9171 18.6 17.6 106 29.7 27.8 107 Giveout 6930 .0 .0 * 15.1 15.0 101 Hayden Fork 9130 3.3 1.0 330* 27.8 24.4 114 Kelley R.S. 8180 7.9 5.1 155 21.0 19.6 107 Lily Lake 9133 7.3 1.3 562 19.3 20.0 96 Monte Cristo 8932 26.0 19.0 137 34.2 29.6 116 Salt River Summit 7640 1.9 .6 317* 16.7 18.9 88 Spring Creek Divide 9000 23.5 22.8 103 26.1 27.4 95 Trial Lake 9992 26.3 19.4 136 31.4 26.6 118 ----- ----- Basin Index (%) 129 111 ----------------------------------------------------------------------------- -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.