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 TUESDAY: MAY 7 , 2024 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 7.6 7.4 103 23.3 23.4 100 Blind Bull Sum 8650 26.8 24.0 112 19.4 19.6 99 Cottonwood Creek 7670 13.7 15.4 89 29.4 28.6 103 East Rim Divide 7930 -M 4.0 * 12.9 13.0 99 Grand Targhee 9260 43.7 47.1 93 33.9 36.4 93 Granite Creek 6770 6.8 7.8 87 18.6 21.1 88 Grassy Lake 7265 22.4 25.0 90 37.9 38.8 98 Gros Ventre Summit 8750 9.3 10.8 86 -M 14.8 * Gunsight Pass 9820 12.4 12.0 103 17.4 16.5 105 Lewis Lake Divide 7850 26.7 29.2 91 38.5 37.4 103 Loomis Park 8240 5.9 9.4 63 17.6 19.1 92 Phillips Bench 8200 24.4 24.8 98 32.3 29.0 111 Salt River Summit 7640 6.3 6.4 98 16.0 18.2 88 Snake River Station 6920 6.3 4.7 134 24.7 25.0 99 Somsen Ranch 6800 5.1 .0 * 23.3 18.6 125 Spring Creek Divide 9000 -M 24.4 * -M 26.2 * Thumb Divide 7980 12.5 9.5 132 20.2 21.6 94 Togwotee Pass 9580 21.7 25.4 85 23.2 28.2 82 Triple Peak 8500 18.5 17.3 107 28.8 29.0 99 Two Ocean Plateau 9240 31.5 32.6 97 29.9 30.4 98 Willow Creek 8080 27.4 25.2 109 39.2 38.6 102 Younts Peak 8350 9.6 13.6 71 17.6 17.6 100 ----- ----- Basin Index (%) 97 99 MADISON HEADWATERS IN WYOMING Black Bear 8170 33.6 40.9 82 41.3 41.2 100 Canyon 7870 8.5 -M * 15.3 -M * Madison Plateau 7750 18.5 22.7 81 25.7 28.2 91 West Yellowstone 6700 -M .0 * 15.0 16.1 93 Whiskey Creek 6800 9.6 11.6 83 21.7 22.8 95 ----- ----- Basin Index (%) 82 96 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 18.9 24.7 77 19.0 23.8 80 Canyon 7870 8.5 -M * 15.3 -M * Evening Star 9200 21.0 27.1 77 30.1 32.2 93 Fisher Creek 9100 24.9 36.0 69 29.5 38.2 77 Monument Peak 8850 15.3 21.8 70 21.6 26.2 82 Northeast Entrance 7350 .1 .2 50* 12.9 14.8 87 Parker Peak 9400 21.9 24.2 90 25.6 23.2 110 Sylvan Lake 8420 12.6 18.2 69 26.2 27.1 97 Thumb Divide 7980 12.5 9.5 132 20.2 21.6 94 Two Ocean Plateau 9240 31.5 32.6 97 29.9 30.4 98 White Mill 8700 18.9 26.8 71 20.8 25.8 81 Wolverine 7650 .0 1.4 0 15.3 14.0 109 ----- ----- Basin Index (%) 80 91 WIND RIVER Burroughs Creek 8750 7.0 -M * 13.8 -M * Castle Creek 8400 .1 .0 * 9.6 10.2 94 Cold Springs 9630 3.7 2.3 161 14.4 11.7 123 Deer Park 9700 18.4 14.0 131 24.6 22.2 111 Hobbs Park 10100 18.6 16.0 116 20.7 17.4 119 Kirwin 9550 13.8 11.9 116 18.4 15.2 121 Little Warm 9370 9.2 8.0 115 16.8 14.2 118 South Pass 9040 14.8 12.8 116 21.3 18.6 115 St. Lawrence Alt 8620 .0 -M * 13.3 -M * Togwotee Pass 9580 21.7 25.4 85 23.2 28.2 82 Townsend Creek 8700 8.6 7.2 119 16.9 14.4 117 ----- ----- Basin Index (%) 112 109 BIGHORN BASIN Bald Mtn. 9380 16.9 20.6 82 16.1 19.1 84 Bear Trap Meadow 8200 1.4 .2 700* 11.8 11.6 102 Bone Springs Div 9350 16.1 17.8 90 15.2 18.6 82 Grave Springs 8550 5.1 7.4 69 12.4 12.6 98 Kirwin 9550 13.8 11.9 116 18.4 15.2 121 Marquette 8760 15.5 7.2 215 20.1 12.8 157 Middle Powder 7760 12.5 10.0 125 13.3 12.8 104 Owl Creek 8975 .5 .4 125* 11.3 8.8 128 Powder River Pass 9480 5.2 9.2 57 14.9 15.8 94 Shell Creek 9580 15.9 16.4 97 16.9 17.0 99 Timber Creek 7950 6.0 1.7 353 15.9 10.8 147 ----- ----- Basin Index (%) 106 107 SHOSHONE RIVER Blackwater 9780 24.8 26.5 94 27.0 26.3 103 Evening Star 9200 21.0 27.1 77 30.1 32.2 93 Marquette 8760 15.5 7.2 215 20.1 12.8 157 Sylvan Lake 8420 12.6 18.2 69 26.2 27.1 97 Sylvan Road 7120 -M .8 * 17.1 18.4 93 Younts Peak 8350 9.6 13.6 71 17.6 17.6 100 ----- ----- Basin Index (%) 90 103 POWDER RIVER Bear Trap Meadow 8200 1.4 .2 700* 11.8 11.6 102 Cloud Peak Reservoir 9860 14.7 16.1 91 19.6 17.8 110 Grave Springs 8550 5.1 7.4 69 12.4 12.6 98 Hansen Sawmill 8360 1.8 2.6 69 12.9 11.2 115 Middle Powder 7760 12.5 10.0 125 13.3 12.8 104 Powder River Pass 9480 5.2 9.2 57 14.9 15.8 94 Soldier Park 8720 1.3 2.0 65 13.1 11.6 113 ----- ----- Basin Index (%) 88 105 TONGUE RIVER Big Goose 7990 6.6 8.1 81 14.6 14.0 104 Bone Springs Div 9350 16.1 17.8 90 15.2 18.6 82 Burgess Junction 7880 9.0 10.9 83 15.0 14.9 101 Dome Lake 8880 -M 11.1 * 15.8 16.3 97 Little Goose 8870 9.9 10.0 99 17.3 16.2 107 Sucker Creek 8880 10.0 10.9 92 18.7 18.0 104 Tie Creek 6870 .4 1.4 29 14.6 14.4 101 ----- ----- Basin Index (%) 88 99 BELLE FOURCHE Blind Park 6890 1.2 .0 * 9.8 13.8 71 Cole Canyon 5910 .8 .0 * 9.4 12.6 75 North Rapid Creek 6130 -M .0 * 11.1 11.4 97 ----- ----- Basin Index (%) * 80 CHEYENNE RIVER BASIN Blind Park 6890 1.2 .0 * 9.8 13.8 71 North Rapid Creek 6130 -M .0 * 11.1 11.4 97 ----- ----- Basin Index (%) * 83 UPPER N. PLATTE Arapaho Ridge 10976 22.7 22.3 102 26.3 25.7 102 Blackhall Mtn 9839 37.3 32.8 114 41.1 36.9 111 Cinnabar Park 9707 18.9 18.0 105 27.4 27.5 100 Columbine 9167 14.1 15.0 94 29.8 29.6 101 Divide Peak 8730 16.7 13.6 123 29.0 25.2 115 Joe Wright 10158 23.5 22.2 106 31.0 31.0 100 Laprele Creek 8390 3.0 3.2 94 14.7 15.5 95 Med Bow 10512 44.7 -M * 39.6 -M * Never Summer 10323 24.5 22.2 110 20.1 20.8 97 North French Creek 10153 31.1 31.7 98 33.4 33.6 99 Old Battle 9860 36.1 35.2 103 39.6 39.2 101 Rawah 9069 9.9 4.8 206 20.7 20.1 103 Sage Creek Basin 7850 1.1 .0 * 18.8 15.0 125 Sand Lake 10098 36.4 32.2 113 35.9 30.2 119 South Brush Creek 8495 5.8 3.7 157 15.8 17.1 92 Tower 10620 46.5 47.6 98 47.1 45.6 103 Webber Springs 9260 21.1 19.8 107 30.3 30.2 100 Whiskey Park 9020 28.7 27.4 105 34.8 33.8 103 Willow Creek Pass 9523 15.8 15.0 105 18.3 16.7 110 Zirkel 9338 17.0 20.6 83 33.8 35.3 96 ----- ----- Basin Index (%) 106 104 SWEETWATER Deer Park 9700 18.4 14.0 131 24.6 22.2 111 Larsen Creek 9000 -M .4 * 16.1 16.2 99 South Pass 9040 14.8 12.8 116 21.3 18.6 115 ----- ----- Basin Index (%) 124 109 LOWER N. PLATTE Casper Mtn. 7920 8.7 10.8 81 19.0 18.0 106 Laprele Creek 8390 3.0 3.2 94 14.7 15.5 95 Reno Hill 8430 9.3 13.4 69 18.7 20.0 94 Windy Peak 7915 5.0 2.0 250 13.8 13.6 101 ----- ----- Basin Index (%) 88 99 LARAMIE RIVER Brooklyn Lake 10250 24.0 22.2 108 30.8 25.8 119 Cinnabar Park 9707 18.9 18.0 105 27.4 27.5 100 Crow Creek 8335 .0 .0 * 12.8 13.5 95 Deadman Hill 10239 23.0 19.0 121 23.2 22.1 105 Rawah 9069 9.9 4.8 206 20.7 20.1 103 Roach 9740 13.3 15.9 84 21.2 22.2 95 Windy Peak 7915 5.0 2.0 250 13.8 13.6 101 ----- ----- Basin Index (%) 115 104 S. PLATTE Crow Creek 8335 .0 .0 * 12.8 13.5 95 ----- ----- Basin Index (%) * 95 LITTLE SNAKE RIVER Battle Mountain 7498 .8 .0 * 22.0 17.8 124 Divide Peak 8730 16.7 13.6 123 29.0 25.2 115 Elk River 8739 7.5 9.4 80 23.3 23.0 101 Elkhead Divide 8800 16.1 -M * 27.8 -M * Little Snake River 8928 25.1 20.8 121 39.0 37.6 104 Old Battle 9860 36.1 35.2 103 39.6 39.2 101 Sage Creek Basin 7850 1.1 .0 * 18.8 15.0 125 Sandstone RS 8152 6.6 3.4 194 21.6 20.3 106 Whiskey Park 9020 28.7 27.4 105 34.8 33.8 103 ----- ----- Basin Index (%) 112 108 UPPER GREEN RIVER Big Sandy Opening 9080 10.2 9.4 109 16.7 15.2 110 Blind Bull Sum 8650 26.8 24.0 112 19.4 19.6 99 East Rim Divide 7930 -M 4.0 * 12.9 13.0 99 Elkhart Park G.S. 9400 8.0 10.0 80 14.1 14.5 97 Gros Ventre Summit 8750 9.3 10.8 86 -M 14.8 * Gunsight Pass 9820 12.4 12.0 103 17.4 16.5 105 Indian Creek 9425 23.1 21.2 109 23.3 22.0 106 Kendall R.S. 7740 .2 1.1 18* 15.2 15.0 101 Larsen Creek 9000 -M .4 * 16.1 16.2 99 Loomis Park 8240 5.9 9.4 63 17.6 19.1 92 New Fork Lake 8340 .8 3.7 22 -M 12.4 * Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 3.2 5.8 55 15.6 15.6 100 Spring Creek Divide 9000 -M 24.4 * -M 26.2 * Triple Peak 8500 18.5 17.3 107 28.8 29.0 99 ----- ----- Basin Index (%) 95 101 LOWER GREEN RIVER Blacks Fork Jct 8869 1.4 .4 350* 16.0 14.5 110 Buck Pasture 9632 11.3 -M * 19.8 -M * EF Blacks Fork GS 9360 3.8 5.3 72 12.3 14.0 88 Hams Fork 7840 -M .0 * 13.5 12.8 105 Henrys Fork 10182 -M -M * 15.8 -M * Hewinta 9500 4.0 3.2 125 17.1 16.3 105 Hickerson Park 9122 -M 1.4 * 15.7 12.5 126 Hole-in-Rock 9168 -M .6 * 12.6 12.6 100 Indian Creek 9425 23.1 21.2 109 23.3 22.0 106 Kelley R.S. 8180 10.9 8.8 124 20.5 18.3 112 Spirit Lk 10235 9.9 12.2 81 21.4 19.9 108 Steel Creek Park 10158 16.1 17.0 95 20.8 19.6 106 ----- ----- Basin Index (%) 102 107 UPPER BEAR RIVER Bear River RS 8777 .0 .0 * 16.3 13.8 118 Bug Lake 7987 14.5 12.9 112 25.8 19.5 132 Burts Miller Ranch 8000 .1 .0 * 13.3 8.8 151 Chalk Creek #1 9171 19.7 21.1 93 28.5 26.3 108 Giveout 6930 -M .0 * 14.5 14.4 101 Hayden Fork 9130 5.3 6.9 77 26.3 23.5 112 Kelley R.S. 8180 10.9 8.8 124 20.5 18.3 112 Lily Lake 9133 8.2 7.6 108 18.2 18.6 98 Monte Cristo 8932 27.4 20.9 131 33.1 28.2 117 Salt River Summit 7640 6.3 6.4 98 16.0 18.2 88 Spring Creek Divide 9000 -M 24.4 * -M 26.2 * Trial Lake 9992 27.4 21.4 128 30.4 25.2 121 ----- ----- Basin Index (%) 113 113 ----------------------------------------------------------------------------- -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.