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 10 , 2024 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 6.9 5.6 123 23.5 23.6 100 Blind Bull Sum 8650 27.3 24.2 113 19.6 20.0 98 Cottonwood Creek 7670 14.9 15.1 99 30.5 29.4 104 East Rim Divide 7930 .0 1.4 0 13.3 13.2 101 Grand Targhee 9260 45.7 46.6 98 35.3 36.8 96 Granite Creek 6770 6.7 5.4 124 19.2 21.3 90 Grassy Lake 7265 22.5 22.6 100 38.2 39.4 97 Gros Ventre Summit 8750 8.9 9.8 91 -M 14.9 * Gunsight Pass 9820 12.8 12.4 103 17.7 17.1 104 Lewis Lake Divide 7850 26.4 29.8 89 38.8 38.4 101 Loomis Park 8240 6.0 7.7 78 18.0 19.5 92 Phillips Bench 8200 25.4 23.6 108 33.4 29.4 114 Salt River Summit 7640 6.3 4.5 140 16.4 18.8 87 Snake River Station 6920 5.9 3.3 179 25.0 26.0 96 Somsen Ranch 6800 5.1 .0 * 23.6 19.1 124 Spring Creek Divide 9000 25.2 24.0 105 25.9 26.8 97 Thumb Divide 7980 12.0 8.0 150 20.5 22.2 92 Togwotee Pass 9580 22.6 25.8 88 24.5 28.6 86 Triple Peak 8500 19.3 16.8 115 29.8 29.6 101 Two Ocean Plateau 9240 31.7 33.1 96 30.3 30.5 99 Willow Creek 8080 28.1 23.6 119 40.2 39.1 103 Younts Peak 8350 9.8 12.6 78 17.9 17.8 101 ----- ----- Basin Index (%) 104 99 MADISON HEADWATERS IN WYOMING Black Bear 8170 34.2 41.0 83 41.6 41.6 100 Canyon 7870 8.6 -M * 15.7 -M * Madison Plateau 7750 18.3 22.2 82 25.8 29.6 87 West Yellowstone 6700 .0 .0 * 14.9 16.2 92 Whiskey Creek 6800 8.8 10.4 85 21.7 23.0 94 ----- ----- Basin Index (%) 83 94 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 20.8 24.8 84 20.7 24.4 85 Canyon 7870 8.6 -M * 15.7 -M * Evening Star 9200 21.7 27.0 80 30.8 33.1 93 Fisher Creek 9100 26.5 36.2 73 31.7 38.7 82 Monument Peak 8850 17.7 21.6 82 23.9 26.4 91 Northeast Entrance 7350 .6 .0 * 13.8 15.1 91 Parker Peak 9400 23.1 23.8 97 26.8 23.4 115 Sylvan Lake 8420 13.2 18.0 73 26.8 27.4 98 Thumb Divide 7980 12.0 8.0 150 20.5 22.2 92 Two Ocean Plateau 9240 31.7 33.1 96 30.3 30.5 99 White Mill 8700 20.4 26.5 77 22.2 26.4 84 Wolverine 7650 .4 .0 * 16.0 14.4 111 ----- ----- Basin Index (%) 86 93 WIND RIVER Burroughs Creek 8750 6.7 -M * 14.0 -M * Castle Creek 8400 .2 .0 * 10.1 10.8 94 Cold Springs 9630 4.0 1.6 250 14.8 12.6 117 Deer Park 9700 20.5 13.8 149 26.6 23.0 116 Hobbs Park 10100 21.8 15.8 138 23.7 17.6 135 Kirwin 9550 15.3 11.3 135 19.8 15.6 127 Little Warm 9370 9.6 7.5 128 17.3 14.4 120 South Pass 9040 16.5 12.7 130 23.2 19.2 121 St. Lawrence Alt 8620 1.2 -M * 14.6 -M * Togwotee Pass 9580 22.6 25.8 88 24.5 28.6 86 Townsend Creek 8700 10.8 5.7 189 19.3 15.2 127 ----- ----- Basin Index (%) 129 114 BIGHORN BASIN Bald Mtn. 9380 19.7 21.0 94 17.9 19.7 91 Bear Trap Meadow 8200 1.5 .1 1500* 12.1 12.0 101 Bone Springs Div 9350 18.3 17.0 108 16.4 18.8 87 Grave Springs 8550 5.7 6.3 90 13.0 12.6 103 Kirwin 9550 15.3 11.3 135 19.8 15.6 127 Marquette 8760 17.7 8.4 211 22.1 13.2 167 Middle Powder 7760 13.6 9.4 145 13.8 13.3 104 Owl Creek 8975 .2 .8 25 11.8 9.0 131 Powder River Pass 9480 6.0 8.8 68 15.8 16.5 96 Shell Creek 9580 17.8 16.8 106 18.5 17.2 108 Timber Creek 7950 5.1 1.4 364 16.6 11.4 146 ----- ----- Basin Index (%) 119 112 SHOSHONE RIVER Blackwater 9780 25.5 25.2 101 28.0 26.7 105 Evening Star 9200 21.7 27.0 80 30.8 33.1 93 Marquette 8760 17.7 8.4 211 22.1 13.2 167 Sylvan Lake 8420 13.2 18.0 73 26.8 27.4 98 Sylvan Road 7120 .0 .0 * 17.2 19.0 91 Younts Peak 8350 9.8 12.6 78 17.9 17.8 101 ----- ----- Basin Index (%) 96 104 POWDER RIVER Bear Trap Meadow 8200 1.5 .1 1500* 12.1 12.0 101 Cloud Peak Reservoir 9860 16.4 16.0 102 20.8 18.4 113 Grave Springs 8550 5.7 6.3 90 13.0 12.6 103 Hansen Sawmill 8360 2.0 1.6 125 13.4 12.2 110 Middle Powder 7760 13.6 9.4 145 13.8 13.3 104 Powder River Pass 9480 6.0 8.8 68 15.8 16.5 96 Soldier Park 8720 1.6 .8 200 13.7 12.0 114 ----- ----- Basin Index (%) 109 106 TONGUE RIVER Big Goose 7990 8.7 8.4 104 16.6 14.5 114 Bone Springs Div 9350 18.3 17.0 108 16.4 18.8 87 Burgess Junction 7880 11.0 10.9 101 17.0 15.7 108 Dome Lake 8880 11.4 11.0 104 17.8 17.6 101 Little Goose 8870 12.2 9.4 130 19.6 16.4 120 Sucker Creek 8880 12.3 12.4 99 21.2 18.8 113 Tie Creek 6870 1.8 .6 300 16.4 15.0 109 ----- ----- Basin Index (%) 109 107 BELLE FOURCHE Blind Park 6890 1.9 .0 * 11.9 14.1 84 Cole Canyon 5910 1.6 .0 * 12.1 13.4 90 North Rapid Creek 6130 .0 .0 * 12.0 12.0 100 ----- ----- Basin Index (%) * 91 CHEYENNE RIVER BASIN Blind Park 6890 1.9 .0 * 11.9 14.1 84 North Rapid Creek 6130 .0 .0 * 12.0 12.0 100 ----- ----- Basin Index (%) * 92 UPPER N. PLATTE Arapaho Ridge 10976 23.8 22.0 108 27.2 26.7 102 Blackhall Mtn 9839 38.2 33.0 116 41.8 37.1 113 Cinnabar Park 9707 19.2 18.0 107 27.6 27.8 99 Columbine 9167 15.0 12.9 116 30.8 30.2 102 Divide Peak 8730 17.0 12.4 137 29.5 25.4 116 Joe Wright 10158 23.6 22.6 104 31.6 32.0 99 Laprele Creek 8390 4.9 1.6 306 16.9 15.6 108 Med Bow 10512 45.0 -M * 40.1 -M * Never Summer 10323 25.2 22.0 115 20.5 20.8 99 North French Creek 10153 31.5 32.2 98 33.8 34.8 97 Old Battle 9860 36.7 36.4 101 40.1 40.6 99 Rawah 9069 10.3 3.6 286 21.2 20.2 105 Sage Creek Basin 7850 .8 .0 * 19.0 15.7 121 Sand Lake 10098 36.9 32.4 114 36.7 31.5 117 South Brush Creek 8495 5.8 1.6 362 16.0 17.7 90 Tower 10620 47.7 48.2 99 48.1 47.4 101 Webber Springs 9260 21.5 18.0 119 30.7 31.2 98 Whiskey Park 9020 28.9 26.7 108 35.2 34.8 101 Willow Creek Pass 9523 16.2 14.4 112 18.7 16.8 111 Zirkel 9338 17.6 19.6 90 34.6 35.4 98 ----- ----- Basin Index (%) 111 103 SWEETWATER Deer Park 9700 20.5 13.8 149 26.6 23.0 116 Larsen Creek 9000 -M .1 * 16.8 16.5 102 South Pass 9040 16.5 12.7 130 23.2 19.2 121 ----- ----- Basin Index (%) 140 113 LOWER N. PLATTE Casper Mtn. 7920 11.6 10.0 116 21.4 18.2 118 Laprele Creek 8390 4.9 1.6 306 16.9 15.6 108 Reno Hill 8430 12.1 11.4 106 21.6 21.2 102 Windy Peak 7915 5.9 .8 738 15.0 14.2 106 ----- ----- Basin Index (%) 145 108 LARAMIE RIVER Brooklyn Lake 10250 24.4 21.0 116 31.4 26.9 117 Cinnabar Park 9707 19.2 18.0 107 27.6 27.8 99 Crow Creek 8335 .0 .0 * 13.0 13.7 95 Deadman Hill 10239 23.4 19.2 122 23.7 22.6 105 Rawah 9069 10.3 3.6 286 21.2 20.2 105 Roach 9740 13.8 15.3 90 21.8 22.6 96 Windy Peak 7915 5.9 .8 738 15.0 14.2 106 ----- ----- Basin Index (%) 125 104 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 18.1 122 Divide Peak 8730 17.0 12.4 137 29.5 25.4 116 Elk River 8739 7.8 7.1 110 23.5 23.3 101 Elkhead Divide 8800 16.3 -M * 27.8 -M * Little Snake River 8928 25.4 21.3 119 39.6 38.0 104 Old Battle 9860 36.7 36.4 101 40.1 40.6 99 Sage Creek Basin 7850 .8 .0 * 19.0 15.7 121 Sandstone RS 8152 6.5 1.6 406 21.9 20.4 107 Whiskey Park 9020 28.9 26.7 108 35.2 34.8 101 ----- ----- Basin Index (%) 117 107 UPPER GREEN RIVER Big Sandy Opening 9080 11.1 9.2 121 17.4 15.7 111 Blind Bull Sum 8650 27.3 24.2 113 19.6 20.0 98 East Rim Divide 7930 .0 1.4 0 13.3 13.2 101 Elkhart Park G.S. 9400 8.3 9.8 85 14.4 14.8 97 Gros Ventre Summit 8750 8.9 9.8 91 -M 14.9 * Gunsight Pass 9820 12.8 12.4 103 17.7 17.1 104 Indian Creek 9425 23.7 20.8 114 23.8 22.8 104 Kendall R.S. 7740 .0 .0 * 15.3 15.2 101 Larsen Creek 9000 -M .1 * 16.8 16.5 102 Loomis Park 8240 6.0 7.7 78 18.0 19.5 92 New Fork Lake 8340 .4 2.8 14 -M 12.8 * Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 2.9 4.6 63 16.0 15.8 101 Spring Creek Divide 9000 25.2 24.0 105 25.9 26.8 97 Triple Peak 8500 19.3 16.8 115 29.8 29.6 101 ----- ----- Basin Index (%) 102 100 LOWER GREEN RIVER Blacks Fork Jct 8869 2.5 .0 * 17.1 14.9 115 Buck Pasture 9632 12.5 -M * 20.9 -M * EF Blacks Fork GS 9360 5.4 4.4 123 13.6 14.4 94 Hams Fork 7840 -M .0 * 13.8 13.4 103 Henrys Fork 10182 -M -M * 17.4 -M * Hewinta 9500 5.9 1.4 421 18.5 16.6 111 Hickerson Park 9122 1.1 .0 * 16.5 12.8 129 Hole-in-Rock 9168 1.0 .0 * 14.0 12.7 110 Indian Creek 9425 23.7 20.8 114 23.8 22.8 104 Kelley R.S. 8180 11.1 8.4 132 20.8 19.0 109 Spirit Lk 10235 11.3 10.6 107 22.9 20.0 114 Steel Creek Park 10158 17.8 17.6 101 22.4 19.9 113 ----- ----- Basin Index (%) 126 110 UPPER BEAR RIVER Bear River RS 8777 .7 .0 * 17.1 14.2 120 Bug Lake 7987 15.2 11.9 128 26.2 20.0 131 Burts Miller Ranch 8000 .0 .0 * 14.1 8.8 160 Chalk Creek #1 9171 20.5 19.6 105 29.4 27.2 108 Giveout 6930 .0 .0 * 14.9 14.8 101 Hayden Fork 9130 6.1 4.7 130 27.5 24.2 114 Kelley R.S. 8180 11.1 8.4 132 20.8 19.0 109 Lily Lake 9133 9.2 6.0 153 19.1 19.6 97 Monte Cristo 8932 28.4 21.0 135 34.0 28.8 118 Salt River Summit 7640 6.3 4.5 140 16.4 18.8 87 Spring Creek Divide 9000 25.2 24.0 105 25.9 26.8 97 Trial Lake 9992 28.4 21.0 135 31.3 26.3 119 ----- ----- 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.