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 MONDAY: MAY 20 , 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 * 24.0 24.6 98 Blind Bull Sum 8650 26.0 21.2 123 19.8 21.0 94 Cottonwood Creek 7670 6.3 7.9 80 31.5 30.0 105 East Rim Divide 7930 -M .0 * 13.5 14.0 96 Grand Targhee 9260 38.0 43.4 88 36.8 38.4 96 Granite Creek 6770 -M .0 * 20.4 22.6 90 Grassy Lake 7265 13.0 15.5 84 38.4 41.4 93 Gros Ventre Summit 8750 2.6 5.4 48 -M 15.6 * Gunsight Pass 9820 8.1 10.0 81 18.1 17.4 104 Lewis Lake Divide 7850 16.5 21.9 75 39.2 39.3 100 Loomis Park 8240 .1 1.6 6 18.1 20.6 88 Phillips Bench 8200 19.5 19.4 101 33.8 31.2 108 Salt River Summit 7640 -M .0 * 16.9 19.0 89 Snake River Station 6920 -M .0 * 25.2 26.8 94 Somsen Ranch 6800 -M .0 * 23.9 19.8 121 Spring Creek Divide 9000 20.5 20.8 99 26.1 28.0 93 Thumb Divide 7980 2.3 .4 575* 20.8 22.4 93 Togwotee Pass 9580 18.0 22.8 79 25.2 29.2 86 Triple Peak 8500 10.7 10.4 103 29.8 30.6 97 Two Ocean Plateau 9240 26.1 29.4 89 30.8 31.2 99 Willow Creek 8080 16.8 17.5 96 40.4 40.2 100 Younts Peak 8350 .2 8.2 2 18.5 18.8 98 ----- ----- Basin Index (%) 88 97 MADISON HEADWATERS IN WYOMING Black Bear 8170 28.0 34.9 80 41.9 43.0 97 Canyon 7870 2.0 -M * 15.9 -M * Madison Plateau 7750 11.5 14.4 80 26.2 30.6 86 West Yellowstone 6700 -M .0 * 15.1 17.0 89 Whiskey Creek 6800 2.8 5.1 55 21.7 24.6 88 ----- ----- Basin Index (%) 78 91 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 18.6 22.9 81 21.0 25.4 83 Canyon 7870 2.0 -M * 15.9 -M * Evening Star 9200 16.1 22.8 71 30.9 34.0 91 Fisher Creek 9100 23.6 35.6 66 32.4 40.9 79 Monument Peak 8850 13.4 18.0 74 24.4 27.4 89 Northeast Entrance 7350 .0 .0 * 14.6 16.2 90 Parker Peak 9400 19.0 18.8 101 27.1 24.4 111 Sylvan Lake 8420 6.3 12.9 49 27.4 28.0 98 Thumb Divide 7980 2.3 .4 575* 20.8 22.4 93 Two Ocean Plateau 9240 26.1 29.4 89 30.8 31.2 99 White Mill 8700 16.2 23.0 70 22.7 27.6 82 Wolverine 7650 .0 .0 * 16.0 15.5 103 ----- ----- Basin Index (%) 77 92 WIND RIVER Burroughs Creek 8750 .1 -M * 13.9 -M * Castle Creek 8400 .0 .0 * 10.2 11.8 86 Cold Springs 9630 .0 .0 * 14.8 13.6 109 Deer Park 9700 16.2 10.2 159 27.0 23.9 113 Hobbs Park 10100 19.1 14.3 134 24.2 19.0 127 Kirwin 9550 8.5 8.8 97 20.0 17.2 116 Little Warm 9370 3.1 2.3 135 17.5 15.7 111 South Pass 9040 10.9 8.0 136 23.5 20.6 114 St. Lawrence Alt 8620 -M -M * 14.8 -M * Togwotee Pass 9580 18.0 22.8 79 25.2 29.2 86 Townsend Creek 8700 5.4 .8 675* 19.7 16.1 122 ----- ----- Basin Index (%) 121 109 BIGHORN BASIN Bald Mtn. 9380 17.7 18.8 94 18.7 20.4 92 Bear Trap Meadow 8200 -M .0 * 13.3 12.8 104 Bone Springs Div 9350 15.5 14.2 109 16.8 19.6 86 Grave Springs 8550 1.1 2.3 48 14.4 13.4 107 Kirwin 9550 8.5 8.8 97 20.0 17.2 116 Marquette 8760 12.3 3.6 342 22.8 15.4 148 Middle Powder 7760 7.5 4.0 188 15.2 14.2 107 Owl Creek 8975 -M .0 * 12.2 9.8 124 Powder River Pass 9480 2.5 5.6 45 16.5 17.4 95 Shell Creek 9580 15.0 14.4 104 18.8 17.8 106 Timber Creek 7950 2.2 .0 * 17.0 12.5 136 ----- ----- Basin Index (%) 115 109 SHOSHONE RIVER Blackwater 9780 23.2 22.9 101 28.3 28.2 100 Evening Star 9200 16.1 22.8 71 30.9 34.0 91 Marquette 8760 12.3 3.6 342 22.8 15.4 148 Sylvan Lake 8420 6.3 12.9 49 27.4 28.0 98 Sylvan Road 7120 -M .0 * 17.5 19.4 90 Younts Peak 8350 .2 8.2 2 18.5 18.8 98 ----- ----- Basin Index (%) 83 101 POWDER RIVER Bear Trap Meadow 8200 -M .0 * 13.3 12.8 104 Cloud Peak Reservoir 9860 15.2 12.8 119 22.3 20.0 112 Grave Springs 8550 1.1 2.3 48 14.4 13.4 107 Hansen Sawmill 8360 -M .0 * 13.8 13.2 105 Middle Powder 7760 7.5 4.0 188 15.2 14.2 107 Powder River Pass 9480 2.5 5.6 45 16.5 17.4 95 Soldier Park 8720 .0 .1 0* 14.3 13.1 109 ----- ----- Basin Index (%) 106 105 TONGUE RIVER Big Goose 7990 4.2 4.1 102 17.4 16.4 106 Bone Springs Div 9350 15.5 14.2 109 16.8 19.6 86 Burgess Junction 7880 6.6 6.6 100 17.6 16.7 105 Dome Lake 8880 -M 6.2 * 19.0 19.7 96 Little Goose 8870 8.6 6.3 137 20.5 17.7 116 Sucker Creek 8880 8.0 7.6 105 22.1 20.8 106 Tie Creek 6870 -M .0 * 17.2 17.0 101 ----- ----- Basin Index (%) 111 102 BELLE FOURCHE Blind Park 6890 .0 .0 * 12.5 15.1 83 Cole Canyon 5910 .0 .0 * 13.2 14.0 94 North Rapid Creek 6130 -M .0 * 12.7 13.2 96 ----- ----- Basin Index (%) * 91 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 12.5 15.1 83 North Rapid Creek 6130 -M .0 * 12.7 13.2 96 ----- ----- Basin Index (%) * 89 UPPER N. PLATTE Arapaho Ridge 10976 21.5 19.6 110 27.5 28.4 97 Blackhall Mtn 9839 32.4 28.7 113 42.1 39.4 107 Cinnabar Park 9707 12.8 12.6 102 28.0 28.8 97 Columbine 9167 4.6 1.2 383* 31.2 31.1 100 Divide Peak 8730 6.5 5.2 125 29.8 25.8 116 Joe Wright 10158 19.6 19.2 102 32.1 33.6 96 Laprele Creek 8390 .0 .0 * 17.3 16.8 103 Med Bow 10512 -M -M * -M -M * Never Summer 10323 23.0 20.0 115 20.9 22.2 94 North French Creek 10153 26.4 29.2 90 34.3 35.8 96 Old Battle 9860 33.4 32.6 102 40.8 42.0 97 Rawah 9069 3.4 .4 850* 21.2 20.2 105 Sage Creek Basin 7850 -M .0 * 19.2 16.7 115 Sand Lake 10098 34.6 27.6 125 37.1 32.4 115 South Brush Creek 8495 .2 .0 * 16.4 19.0 86 Tower 10620 43.8 43.2 101 48.7 49.4 99 Webber Springs 9260 15.6 11.2 139 31.4 32.2 98 Whiskey Park 9020 26.0 22.6 115 35.6 36.0 99 Willow Creek Pass 9523 11.4 10.8 106 18.9 17.7 107 Zirkel 9338 7.1 9.3 76 35.3 35.9 98 ----- ----- Basin Index (%) 110 101 SWEETWATER Deer Park 9700 16.2 10.2 159 27.0 23.9 113 Larsen Creek 9000 -M .0 * 16.8 16.8 100 South Pass 9040 10.9 8.0 136 23.5 20.6 114 ----- ----- Basin Index (%) 149 110 LOWER N. PLATTE Casper Mtn. 7920 4.7 3.0 157 22.3 18.8 119 Laprele Creek 8390 .0 .0 * 17.3 16.8 103 Reno Hill 8430 7.6 4.8 158 22.2 21.8 102 Windy Peak 7915 .1 .0 * 15.2 14.5 105 ----- ----- Basin Index (%) 159 107 LARAMIE RIVER Brooklyn Lake 10250 18.5 16.6 111 31.6 28.0 113 Cinnabar Park 9707 12.8 12.6 102 28.0 28.8 97 Crow Creek 8335 .0 .0 * 13.1 14.4 91 Deadman Hill 10239 18.2 16.2 112 23.9 24.0 100 Rawah 9069 3.4 .4 850* 21.2 20.2 105 Roach 9740 7.8 9.3 84 22.2 24.2 92 Windy Peak 7915 .1 .0 * 15.2 14.5 105 ----- ----- Basin Index (%) 110 101 S. PLATTE Crow Creek 8335 .0 .0 * 13.1 14.4 91 ----- ----- Basin Index (%) * 91 LITTLE SNAKE RIVER Battle Mountain 7498 .1 .0 * 22.3 19.2 116 Divide Peak 8730 6.5 5.2 125 29.8 25.8 116 Elk River 8739 .2 .0 * 23.9 23.7 101 Elkhead Divide 8800 7.5 -M * 28.1 -M * Little Snake River 8928 16.4 12.8 128 40.1 39.6 101 Old Battle 9860 33.4 32.6 102 40.8 42.0 97 Sage Creek Basin 7850 -M .0 * 19.2 16.7 115 Sandstone RS 8152 .1 .0 * 22.3 21.7 103 Whiskey Park 9020 26.0 22.6 115 35.6 36.0 99 ----- ----- Basin Index (%) 113 104 UPPER GREEN RIVER Big Sandy Opening 9080 3.2 3.0 107 17.6 16.4 107 Blind Bull Sum 8650 26.0 21.2 123 19.8 21.0 94 East Rim Divide 7930 -M .0 * 13.5 14.0 96 Elkhart Park G.S. 9400 .7 5.4 13 14.2 16.2 88 Gros Ventre Summit 8750 2.6 5.4 48 -M 15.6 * Gunsight Pass 9820 8.1 10.0 81 18.1 17.4 104 Indian Creek 9425 16.5 19.0 87 24.1 24.0 100 Kendall R.S. 7740 .0 .0 * 15.5 16.2 96 Larsen Creek 9000 -M .0 * 16.8 16.8 100 Loomis Park 8240 .1 1.6 6 18.1 20.6 88 New Fork Lake 8340 -M .0 * -M 13.7 * Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 -M .0 * 16.3 16.2 101 Spring Creek Divide 9000 20.5 20.8 99 26.1 28.0 93 Triple Peak 8500 10.7 10.4 103 29.8 30.6 97 ----- ----- Basin Index (%) 91 97 LOWER GREEN RIVER Blacks Fork Jct 8869 .4 .0 * 17.2 15.2 113 Buck Pasture 9632 6.0 -M * 21.4 -M * EF Blacks Fork GS 9360 1.5 .0 * 14.1 15.8 89 Hams Fork 7840 -M .0 * 14.0 14.1 99 Henrys Fork 10182 -M -M * 17.9 -M * Hewinta 9500 -M .0 * 18.6 17.2 108 Hickerson Park 9122 -M .0 * 16.4 13.2 124 Hole-in-Rock 9168 -M .0 * 14.2 13.4 106 Indian Creek 9425 16.5 19.0 87 24.1 24.0 100 Kelley R.S. 8180 2.4 2.1 114 21.0 20.4 103 Spirit Lk 10235 5.9 3.1 190 23.1 20.5 113 Steel Creek Park 10158 14.5 14.4 101 22.6 21.0 108 ----- ----- Basin Index (%) 107* 106 UPPER BEAR RIVER Bear River RS 8777 -M .0 * 17.3 14.6 118 Bug Lake 7987 4.4 5.2 85 26.3 20.3 130 Burts Miller Ranch 8000 .2 .0 * 14.4 9.4 153 Chalk Creek #1 9171 11.9 12.8 93 29.8 28.8 103 Giveout 6930 -M .0 * 15.1 15.7 96 Hayden Fork 9130 -M .0 * 27.8 24.8 112 Kelley R.S. 8180 2.4 2.1 114 21.0 20.4 103 Lily Lake 9133 1.6 .0 * 19.2 20.4 94 Monte Cristo 8932 18.9 15.0 126 34.2 29.8 115 Salt River Summit 7640 -M .0 * 16.9 19.0 89 Spring Creek Divide 9000 20.5 20.8 99 26.1 28.0 93 Trial Lake 9992 20.6 14.8 139 31.5 27.0 117 ----- ----- Basin Index (%) 114 108 ----------------------------------------------------------------------------- -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.