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 22 , 2024 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 .0 .0 * 24.0 24.8 97 Blind Bull Sum 8650 24.1 20.8 116 19.8 21.2 93 Cottonwood Creek 7670 4.8 5.8 83 30.6 30.4 101 East Rim Divide 7930 .0 .0 * 13.5 14.1 96 Grand Targhee 9260 37.9 43.8 87 36.8 38.8 95 Granite Creek 6770 .0 .0 * 20.5 22.7 90 Grassy Lake 7265 12.4 14.1 88 38.5 41.7 92 Gros Ventre Summit 8750 1.6 3.8 42 -M 15.8 * Gunsight Pass 9820 7.7 9.4 82 18.3 17.6 104 Lewis Lake Divide 7850 15.7 21.0 75 39.3 39.5 99 Loomis Park 8240 .1 .3 33* 18.1 20.8 87 Phillips Bench 8200 19.1 17.6 109 33.9 31.2 109 Salt River Summit 7640 .0 .0 * 17.2 19.2 90 Snake River Station 6920 .0 .0 * 25.2 27.6 91 Somsen Ranch 6800 .0 .0 * 24.0 20.0 120 Spring Creek Divide 9000 19.9 19.8 101 26.1 28.0 93 Thumb Divide 7980 .9 .4 225* 20.9 22.6 92 Togwotee Pass 9580 17.7 22.8 78 25.2 29.8 85 Triple Peak 8500 10.1 8.7 116 29.8 30.7 97 Two Ocean Plateau 9240 26.0 28.2 92 31.0 32.2 96 Willow Creek 8080 15.7 15.0 105 40.4 40.8 99 Younts Peak 8350 .2 5.0 4 18.7 18.8 99 ----- ----- Basin Index (%) 90 96 MADISON HEADWATERS IN WYOMING Black Bear 8170 27.9 33.4 84 42.3 43.6 97 Canyon 7870 1.2 -M * 16.0 -M * Madison Plateau 7750 11.3 13.4 84 26.2 30.8 85 West Yellowstone 6700 -M .0 * 15.3 17.3 88 Whiskey Creek 6800 2.3 3.6 64 21.9 24.8 88 ----- ----- Basin Index (%) 82 91 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 18.4 21.6 85 21.0 25.6 82 Canyon 7870 1.2 -M * 16.0 -M * Evening Star 9200 15.8 21.4 74 31.0 34.0 91 Fisher Creek 9100 23.9 34.9 68 32.6 41.4 79 Monument Peak 8850 13.4 18.0 74 24.7 27.8 89 Northeast Entrance 7350 .0 .0 * 14.7 16.5 89 Parker Peak 9400 18.0 18.5 97 27.3 24.4 112 Sylvan Lake 8420 5.4 11.6 47 27.4 28.6 96 Thumb Divide 7980 .9 .4 225* 20.9 22.6 92 Two Ocean Plateau 9240 26.0 28.2 92 31.0 32.2 96 White Mill 8700 16.1 22.6 71 22.9 27.8 82 Wolverine 7650 .0 .0 * 16.0 15.6 103 ----- ----- Basin Index (%) 78 91 WIND RIVER Burroughs Creek 8750 .1 -M * 14.0 -M * Castle Creek 8400 -M .0 * 10.3 12.0 86 Cold Springs 9630 .0 .0 * 15.1 13.8 109 Deer Park 9700 16.4 9.2 178 27.3 24.3 112 Hobbs Park 10100 19.2 12.8 150 24.5 19.4 126 Kirwin 9550 8.3 7.5 111 20.2 17.2 117 Little Warm 9370 2.5 1.4 179 17.7 15.8 112 South Pass 9040 11.2 7.5 149 23.9 20.6 116 St. Lawrence Alt 8620 -M -M * 15.2 -M * Togwotee Pass 9580 17.7 22.8 78 25.2 29.8 85 Townsend Creek 8700 5.6 .0 * 20.1 16.6 121 ----- ----- Basin Index (%) 132 109 BIGHORN BASIN Bald Mtn. 9380 18.3 17.7 103 19.5 20.5 95 Bear Trap Meadow 8200 .5 .0 * 14.7 12.8 115 Bone Springs Div 9350 16.3 13.2 123 17.5 19.7 89 Grave Springs 8550 1.3 .6 217* 14.7 13.4 110 Kirwin 9550 8.3 7.5 111 20.2 17.2 117 Marquette 8760 13.5 2.4 562 24.0 15.8 152 Middle Powder 7760 8.1 1.9 426 15.9 14.4 110 Owl Creek 8975 .0 .0 * 12.8 9.9 129 Powder River Pass 9480 3.6 4.2 86 17.9 17.5 102 Shell Creek 9580 15.6 14.3 109 19.4 18.3 106 Timber Creek 7950 3.0 .0 * 17.9 12.5 143 ----- ----- Basin Index (%) 143 113 SHOSHONE RIVER Blackwater 9780 22.8 22.6 101 28.4 28.4 100 Evening Star 9200 15.8 21.4 74 31.0 34.0 91 Marquette 8760 13.5 2.4 562 24.0 15.8 152 Sylvan Lake 8420 5.4 11.6 47 27.4 28.6 96 Sylvan Road 7120 -M .0 * 17.5 19.4 90 Younts Peak 8350 .2 5.0 4 18.7 18.8 99 ----- ----- Basin Index (%) 92 101 POWDER RIVER Bear Trap Meadow 8200 .5 .0 * 14.7 12.8 115 Cloud Peak Reservoir 9860 17.0 12.0 142 24.0 20.0 120 Grave Springs 8550 1.3 .6 217* 14.7 13.4 110 Hansen Sawmill 8360 .8 .0 * 15.4 13.4 115 Middle Powder 7760 8.1 1.9 426 15.9 14.4 110 Powder River Pass 9480 3.6 4.2 86 17.9 17.5 102 Soldier Park 8720 1.3 .0 * 15.8 13.2 120 ----- ----- Basin Index (%) 174* 113 TONGUE RIVER Big Goose 7990 5.2 2.2 236 18.7 16.6 113 Bone Springs Div 9350 16.3 13.2 123 17.5 19.7 89 Burgess Junction 7880 7.3 5.0 146 18.7 17.0 110 Dome Lake 8880 -M 4.8 * 20.6 19.8 104 Little Goose 8870 9.9 4.8 206 21.8 18.0 121 Sucker Creek 8880 9.1 7.2 126 23.4 21.2 110 Tie Creek 6870 .9 .0 * 18.3 17.4 105 ----- ----- Basin Index (%) 150 107 BELLE FOURCHE Blind Park 6890 .2 .0 * 13.0 15.2 86 Cole Canyon 5910 .0 .0 * -M 14.2 * North Rapid Creek 6130 -M .0 * 13.1 13.4 98 ----- ----- Basin Index (%) * 91 CHEYENNE RIVER BASIN Blind Park 6890 .2 .0 * 13.0 15.2 86 North Rapid Creek 6130 -M .0 * 13.1 13.4 98 ----- ----- Basin Index (%) * 91 UPPER N. PLATTE Arapaho Ridge 10976 21.2 18.6 114 27.6 28.4 97 Blackhall Mtn 9839 32.1 28.9 111 42.9 39.8 108 Cinnabar Park 9707 11.6 10.4 112 28.2 29.0 97 Columbine 9167 3.3 .4 825* 31.2 31.2 100 Divide Peak 8730 5.5 3.2 172 29.8 26.2 114 Joe Wright 10158 18.5 18.1 102 32.4 34.0 95 Laprele Creek 8390 .4 .0 * 18.1 16.8 108 Med Bow 10512 -M -M * -M -M * Never Summer 10323 22.4 19.2 117 21.1 22.4 94 North French Creek 10153 26.0 27.4 95 34.9 36.2 96 Old Battle 9860 33.0 32.0 103 41.1 42.0 98 Rawah 9069 2.6 .4 650* 21.3 20.4 104 Sage Creek Basin 7850 -M .0 * 19.4 16.7 116 Sand Lake 10098 33.9 27.0 126 37.3 32.4 115 South Brush Creek 8495 .1 .0 * 16.7 19.1 87 Tower 10620 43.6 41.2 106 49.0 49.5 99 Webber Springs 9260 14.7 8.9 165 31.6 32.2 98 Whiskey Park 9020 24.2 20.4 119 36.0 36.0 100 Willow Creek Pass 9523 10.2 9.6 106 19.0 18.0 106 Zirkel 9338 5.5 7.2 76 35.6 35.9 99 ----- ----- Basin Index (%) 113 101 SWEETWATER Deer Park 9700 16.4 9.2 178 27.3 24.3 112 Larsen Creek 9000 -M .0 * 17.3 16.9 102 South Pass 9040 11.2 7.5 149 23.9 20.6 116 ----- ----- Basin Index (%) 165 111 LOWER N. PLATTE Casper Mtn. 7920 5.4 1.8 300 23.2 19.1 121 Laprele Creek 8390 .4 .0 * 18.1 16.8 108 Reno Hill 8430 8.1 3.2 253 22.9 21.9 105 Windy Peak 7915 .2 .0 * 15.7 14.8 106 ----- ----- Basin Index (%) 282 110 LARAMIE RIVER Brooklyn Lake 10250 17.5 14.2 123 31.9 28.1 114 Cinnabar Park 9707 11.6 10.4 112 28.2 29.0 97 Crow Creek 8335 .0 .0 * 13.2 14.6 90 Deadman Hill 10239 17.2 15.6 110 24.2 24.0 101 Rawah 9069 2.6 .4 650* 21.3 20.4 104 Roach 9740 6.8 9.0 76 22.2 24.2 92 Windy Peak 7915 .2 .0 * 15.7 14.8 106 ----- ----- Basin Index (%) 113 101 S. PLATTE Crow Creek 8335 .0 .0 * 13.2 14.6 90 ----- ----- Basin Index (%) * 90 LITTLE SNAKE RIVER Battle Mountain 7498 -M .0 * 22.5 19.2 117 Divide Peak 8730 5.5 3.2 172 29.8 26.2 114 Elk River 8739 .2 .0 * 24.2 23.9 101 Elkhead Divide 8800 5.9 -M * 28.1 -M * Little Snake River 8928 15.3 11.2 137 40.7 39.6 103 Old Battle 9860 33.0 32.0 103 41.1 42.0 98 Sage Creek Basin 7850 -M .0 * 19.4 16.7 116 Sandstone RS 8152 .1 .0 * 22.4 21.7 103 Whiskey Park 9020 24.2 20.4 119 36.0 36.0 100 ----- ----- Basin Index (%) 117 105 UPPER GREEN RIVER Big Sandy Opening 9080 3.6 .9 400* 18.1 16.4 110 Blind Bull Sum 8650 24.1 20.8 116 19.8 21.2 93 East Rim Divide 7930 .0 .0 * 13.5 14.1 96 Elkhart Park G.S. 9400 .2 3.8 5 14.4 16.6 87 Gros Ventre Summit 8750 1.6 3.8 42 -M 15.8 * Gunsight Pass 9820 7.7 9.4 82 18.3 17.6 104 Indian Creek 9425 16.5 16.8 98 24.1 24.6 98 Kendall R.S. 7740 -M .0 * 15.5 16.2 96 Larsen Creek 9000 -M .0 * 17.3 16.9 102 Loomis Park 8240 .1 .3 33* 18.1 20.8 87 New Fork Lake 8340 -M .0 * -M 13.8 * Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 -M .0 * 16.2 16.6 98 Spring Creek Divide 9000 19.9 19.8 101 26.1 28.0 93 Triple Peak 8500 10.1 8.7 116 29.8 30.7 97 ----- ----- Basin Index (%) 99 96 LOWER GREEN RIVER Blacks Fork Jct 8869 .2 .0 * 17.6 15.4 114 Buck Pasture 9632 6.5 -M * 21.8 -M * EF Blacks Fork GS 9360 1.9 .0 * 14.6 16.4 89 Hams Fork 7840 -M .0 * 14.2 14.4 99 Henrys Fork 10182 -M -M * 18.5 -M * Hewinta 9500 -M .0 * 19.1 17.2 111 Hickerson Park 9122 -M .0 * 17.1 13.4 128 Hole-in-Rock 9168 -M .0 * 14.5 13.4 108 Indian Creek 9425 16.5 16.8 98 24.1 24.6 98 Kelley R.S. 8180 1.4 1.0 140* 21.0 20.8 101 Spirit Lk 10235 6.6 2.7 244 23.6 20.5 115 Steel Creek Park 10158 15.0 12.8 117 23.2 21.0 110 ----- ----- Basin Index (%) 125* 107 UPPER BEAR RIVER Bear River RS 8777 -M .0 * 17.6 14.8 119 Bug Lake 7987 3.2 2.0 160 26.3 20.5 128 Burts Miller Ranch 8000 .0 .0 * 14.5 9.7 149 Chalk Creek #1 9171 12.1 10.6 114 30.0 29.0 103 Giveout 6930 .0 .0 * 15.2 16.0 95 Hayden Fork 9130 -M .0 * 28.1 24.8 113 Kelley R.S. 8180 1.4 1.0 140* 21.0 20.8 101 Lily Lake 9133 1.9 .0 * 19.6 20.6 95 Monte Cristo 8932 18.6 14.0 133 34.4 29.8 115 Salt River Summit 7640 .0 .0 * 17.2 19.2 90 Spring Creek Divide 9000 19.9 19.8 101 26.1 28.0 93 Trial Lake 9992 21.2 13.4 158 31.8 27.1 117 ----- ----- Basin Index (%) 129* 108 ----------------------------------------------------------------------------- -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.