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 FRIDAY: MAY 17 , 2024 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 .4 .6 67* 23.9 24.2 99 Blind Bull Sum 8650 27.1 22.6 120 19.8 20.7 96 Cottonwood Creek 7670 9.6 9.1 105 31.4 30.0 105 East Rim Divide 7930 -M .0 * 13.6 13.8 99 Grand Targhee 9260 41.2 44.2 93 36.7 37.5 98 Granite Creek 6770 .1 1.2 8* 19.9 22.2 90 Grassy Lake 7265 16.4 19.0 86 38.5 40.5 95 Gros Ventre Summit 8750 5.2 7.4 70 -M 15.2 * Gunsight Pass 9820 10.0 11.0 91 18.1 17.4 104 Lewis Lake Divide 7850 19.6 23.4 84 39.2 39.2 100 Loomis Park 8240 1.2 4.6 26 18.1 20.4 89 Phillips Bench 8200 22.0 21.0 105 33.9 30.8 110 Salt River Summit 7640 .0 .0 * 17.0 18.9 90 Snake River Station 6920 .0 .0 * 25.3 26.6 95 Somsen Ranch 6800 -M .0 * 24.0 19.6 122 Spring Creek Divide 9000 22.6 21.7 104 26.1 27.5 95 Thumb Divide 7980 5.4 3.6 150 20.9 22.3 94 Togwotee Pass 9580 20.1 23.4 86 25.1 29.0 87 Triple Peak 8500 13.8 12.6 110 30.0 30.2 99 Two Ocean Plateau 9240 28.5 30.8 93 30.9 31.2 99 Willow Creek 8080 20.5 18.2 113 40.4 40.0 101 Younts Peak 8350 1.9 9.0 21 18.4 18.2 101 ----- ----- Basin Index (%) 94 98 MADISON HEADWATERS IN WYOMING Black Bear 8170 29.7 36.6 81 41.9 42.8 98 Canyon 7870 3.6 -M * 15.8 -M * Madison Plateau 7750 13.2 16.8 79 25.9 30.6 85 West Yellowstone 6700 -M .0 * 14.9 16.8 89 Whiskey Creek 6800 4.6 6.9 67 21.7 24.2 90 ----- ----- Basin Index (%) 79 91 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 19.2 23.6 81 20.9 25.0 84 Canyon 7870 3.6 -M * 15.8 -M * Evening Star 9200 17.8 24.6 72 31.0 33.8 92 Fisher Creek 9100 23.1 36.2 64 32.0 40.9 78 Monument Peak 8850 14.4 19.5 74 24.2 27.2 89 Northeast Entrance 7350 .0 .0 * 14.2 16.2 88 Parker Peak 9400 20.8 20.9 100 27.2 24.0 113 Sylvan Lake 8420 9.1 14.3 64 27.4 27.9 98 Thumb Divide 7980 5.4 3.6 150 20.9 22.3 94 Two Ocean Plateau 9240 28.5 30.8 93 30.9 31.2 99 White Mill 8700 16.8 24.2 69 22.4 27.6 81 Wolverine 7650 .1 .0 * 15.9 15.2 105 ----- ----- Basin Index (%) 79 92 WIND RIVER Burroughs Creek 8750 .9 -M * 13.9 -M * Castle Creek 8400 .0 .0 * 10.2 11.6 88 Cold Springs 9630 .1 .0 * 14.9 13.5 110 Deer Park 9700 18.6 12.2 152 27.0 23.4 115 Hobbs Park 10100 21.2 16.0 132 24.2 18.8 129 Kirwin 9550 11.3 10.4 109 20.0 16.3 123 Little Warm 9370 5.9 5.2 113 17.6 15.2 116 South Pass 9040 13.8 9.8 141 23.5 19.6 120 St. Lawrence Alt 8620 .0 -M * 14.8 -M * Togwotee Pass 9580 20.1 23.4 86 25.1 29.0 87 Townsend Creek 8700 8.5 1.4 607 19.8 15.7 126 ----- ----- Basin Index (%) 127 112 BIGHORN BASIN Bald Mtn. 9380 19.1 19.4 98 18.8 20.3 93 Bear Trap Meadow 8200 -M .0 * 13.4 12.6 106 Bone Springs Div 9350 16.8 15.4 109 16.9 19.4 87 Grave Springs 8550 3.9 4.4 89 14.5 13.2 110 Kirwin 9550 11.3 10.4 109 20.0 16.3 123 Marquette 8760 15.0 5.0 300 22.9 14.9 154 Middle Powder 7760 10.0 5.5 182 15.4 13.6 113 Owl Creek 8975 -M .0 * 12.3 9.5 129 Powder River Pass 9480 4.4 7.5 59 16.5 17.0 97 Shell Creek 9580 16.3 15.4 106 18.9 17.6 107 Timber Creek 7950 1.0 .0 * 17.1 12.0 142 ----- ----- Basin Index (%) 118 112 SHOSHONE RIVER Blackwater 9780 24.1 23.1 104 28.4 27.5 103 Evening Star 9200 17.8 24.6 72 31.0 33.8 92 Marquette 8760 15.0 5.0 300 22.9 14.9 154 Sylvan Lake 8420 9.1 14.3 64 27.4 27.9 98 Sylvan Road 7120 -M .0 * 17.4 19.2 91 Younts Peak 8350 1.9 9.0 21 18.4 18.2 101 ----- ----- Basin Index (%) 89 103 POWDER RIVER Bear Trap Meadow 8200 -M .0 * 13.4 12.6 106 Cloud Peak Reservoir 9860 16.9 14.5 117 22.4 19.5 115 Grave Springs 8550 3.9 4.4 89 14.5 13.2 110 Hansen Sawmill 8360 -M .0 * 14.2 13.2 108 Middle Powder 7760 10.0 5.5 182 15.4 13.6 113 Powder River Pass 9480 4.4 7.5 59 16.5 17.0 97 Soldier Park 8720 .3 .1 300* 14.4 12.8 112 ----- ----- Basin Index (%) 111 109 TONGUE RIVER Big Goose 7990 6.3 6.2 102 17.2 15.8 109 Bone Springs Div 9350 16.8 15.4 109 16.9 19.4 87 Burgess Junction 7880 8.3 8.6 97 17.6 16.4 107 Dome Lake 8880 -M 8.2 * 18.9 19.0 99 Little Goose 8870 10.2 8.0 128 20.5 17.4 118 Sucker Creek 8880 10.1 9.1 111 22.2 19.9 112 Tie Creek 6870 -M .0 * 17.2 16.1 107 ----- ----- Basin Index (%) 109 105 BELLE FOURCHE Blind Park 6890 .0 .0 * 12.5 14.6 86 Cole Canyon 5910 .1 .0 * 13.3 14.0 95 North Rapid Creek 6130 -M .0 * 12.6 12.6 100 ----- ----- Basin Index (%) * 93 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 12.5 14.6 86 North Rapid Creek 6130 -M .0 * 12.6 12.6 100 ----- ----- Basin Index (%) * 92 UPPER N. PLATTE Arapaho Ridge 10976 -M 19.8 * -M 28.2 * Blackhall Mtn 9839 34.8 27.9 125 41.8 39.0 107 Cinnabar Park 9707 15.5 14.2 109 27.7 27.9 99 Columbine 9167 8.5 4.8 177 31.0 30.8 101 Divide Peak 8730 10.7 7.5 143 29.6 25.7 115 Joe Wright 10158 22.2 20.4 109 31.9 32.8 97 Laprele Creek 8390 1.6 .0 * 17.3 16.4 105 Med Bow 10512 43.4 -M * 40.4 -M * Never Summer 10323 24.4 20.4 120 20.8 21.9 95 North French Creek 10153 28.7 31.3 92 34.1 35.4 96 Old Battle 9860 35.3 34.7 102 40.5 41.6 97 Rawah 9069 6.0 .1 6000* 21.2 20.2 105 Sage Creek Basin 7850 -M .0 * 19.1 16.4 116 Sand Lake 10098 36.5 29.8 122 37.1 31.6 117 South Brush Creek 8495 .2 .0 * 16.2 19.0 85 Tower 10620 45.9 46.2 99 48.6 48.6 100 Webber Springs 9260 19.2 13.0 148 31.0 32.0 97 Whiskey Park 9020 29.3 23.6 124 35.3 35.3 100 Willow Creek Pass 9523 13.4 11.3 119 18.8 17.3 109 Zirkel 9338 11.2 11.6 97 35.0 35.6 98 ----- ----- Basin Index (%) 116 102 SWEETWATER Deer Park 9700 18.6 12.2 152 27.0 23.4 115 Larsen Creek 9000 -M .0 * 16.8 16.5 102 South Pass 9040 13.8 9.8 141 23.5 19.6 120 ----- ----- Basin Index (%) 147 113 LOWER N. PLATTE Casper Mtn. 7920 8.5 4.0 212 22.2 18.6 119 Laprele Creek 8390 1.6 .0 * 17.3 16.4 105 Reno Hill 8430 10.4 8.0 130 22.3 21.6 103 Windy Peak 7915 .9 .0 * 15.2 14.4 106 ----- ----- Basin Index (%) 178 108 LARAMIE RIVER Brooklyn Lake 10250 21.5 18.4 117 31.5 27.4 115 Cinnabar Park 9707 15.5 14.2 109 27.7 27.9 99 Crow Creek 8335 .0 .0 * 13.0 14.0 93 Deadman Hill 10239 21.4 16.8 127 23.9 23.7 101 Rawah 9069 6.0 .1 6000* 21.2 20.2 105 Roach 9740 10.6 11.2 95 22.0 24.0 92 Windy Peak 7915 .9 .0 * 15.2 14.4 106 ----- ----- Basin Index (%) 125 102 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 18.6 119 Divide Peak 8730 10.7 7.5 143 29.6 25.7 115 Elk River 8739 .9 .6 150* 23.5 23.6 100 Elkhead Divide 8800 11.0 -M * 28.0 -M * Little Snake River 8928 19.8 14.5 137 39.7 39.4 101 Old Battle 9860 35.3 34.7 102 40.5 41.6 97 Sage Creek Basin 7850 -M .0 * 19.1 16.4 116 Sandstone RS 8152 .1 .0 * 22.1 21.5 103 Whiskey Park 9020 29.3 23.6 124 35.3 35.3 100 ----- ----- Basin Index (%) 119 104 UPPER GREEN RIVER Big Sandy Opening 9080 6.1 6.8 90 17.5 16.0 109 Blind Bull Sum 8650 27.1 22.6 120 19.8 20.7 96 East Rim Divide 7930 -M .0 * 13.6 13.8 99 Elkhart Park G.S. 9400 3.9 7.5 52 14.5 16.0 91 Gros Ventre Summit 8750 5.2 7.4 70 -M 15.2 * Gunsight Pass 9820 10.0 11.0 91 18.1 17.4 104 Indian Creek 9425 19.9 20.5 97 24.2 23.6 103 Kendall R.S. 7740 .0 .0 * 15.5 16.0 97 Larsen Creek 9000 -M .0 * 16.8 16.5 102 Loomis Park 8240 1.2 4.6 26 18.1 20.4 89 New Fork Lake 8340 -M .0 * -M 13.7 * Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 -M .0 * 16.3 16.1 101 Spring Creek Divide 9000 22.6 21.7 104 26.1 27.5 95 Triple Peak 8500 13.8 12.6 110 30.0 30.2 99 ----- ----- Basin Index (%) 96 98 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 .0 * 17.3 15.1 115 Buck Pasture 9632 9.4 -M * 21.3 -M * EF Blacks Fork GS 9360 2.3 .0 * 14.0 14.9 94 Hams Fork 7840 -M .0 * 14.0 14.0 100 Henrys Fork 10182 -M -M * 17.9 -M * Hewinta 9500 1.8 .0 * 18.7 17.1 109 Hickerson Park 9122 .0 .0 * 16.5 13.2 125 Hole-in-Rock 9168 .0 .0 * 14.2 13.4 106 Indian Creek 9425 19.9 20.5 97 24.2 23.6 103 Kelley R.S. 8180 5.7 3.2 178 21.0 19.8 106 Spirit Lk 10235 9.6 5.0 192 23.1 20.2 114 Steel Creek Park 10158 16.8 15.4 109 22.7 20.9 109 ----- ----- Basin Index (%) 127* 108 UPPER BEAR RIVER Bear River RS 8777 .0 .0 * 17.3 14.4 120 Bug Lake 7987 8.5 8.4 101 26.3 20.2 130 Burts Miller Ranch 8000 .0 .0 * 14.4 9.3 155 Chalk Creek #1 9171 16.2 15.7 103 29.8 28.4 105 Giveout 6930 -M .0 * 15.2 15.3 99 Hayden Fork 9130 1.1 .3 367* 27.8 24.8 112 Kelley R.S. 8180 5.7 3.2 178 21.0 19.8 106 Lily Lake 9133 5.5 .0 * 19.3 20.2 96 Monte Cristo 8932 23.7 17.6 135 34.1 29.8 114 Salt River Summit 7640 .0 .0 * 17.0 18.9 90 Spring Creek Divide 9000 22.6 21.7 104 26.1 27.5 95 Trial Lake 9992 23.4 18.2 129 31.4 27.0 116 ----- ----- Basin Index (%) 125 109 ----------------------------------------------------------------------------- -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.