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 THURSDAY: JUNE 1 , 2023 ------------------------------------------------------------------------------ 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 * 23.4 25.4 92 Blind Bull Sum 8650 12.7 15.7 81 21.6 23.2 93 Cottonwood Creek 7670 .3 .0 * 34.9 32.2 108 East Rim Divide 7930 -M .0 * 14.9 15.2 98 Grand Targhee 9260 31.4 37.2 84 35.0 40.2 87 Granite Creek 6770 -M .0 * 19.2 24.2 79 Grassy Lake 7265 8.6 5.3 162 45.3 43.2 105 Gros Ventre Summit 8750 -M .0 * 14.0 16.1 87 Gunsight Pass 9820 .4 4.6 9 16.6 18.2 91 Lewis Lake Divide 7850 9.5 11.2 85 44.4 41.0 108 Loomis Park 8240 .2 .0 * 19.4 21.8 89 Phillips Bench 8200 8.0 9.2 87 34.0 31.9 107 Salt River Summit 7640 -M .0 * 23.7 20.6 115 Snake River Station 6920 .0 .0 * 26.4 28.4 93 Somsen Ranch 6800 -M .0 * 24.8 21.2 117 Spring Creek Divide 9000 -M 13.0 * -M 29.6 * Thumb Divide 7980 .1 .0 * 22.2 23.4 95 Togwotee Pass 9580 7.6 18.5 41 24.9 31.0 80 Triple Peak 8500 1.7 .0 * 29.6 32.2 92 Two Ocean Plateau 9240 18.2 25.2 72 31.9 33.2 96 Willow Creek 8080 5.0 5.2 96 42.8 42.0 102 Younts Peak 8350 .0 .0 * 16.6 20.3 82 ----- ----- Basin Index (%) 79* 97 MADISON HEADWATERS IN WYOMING Black Bear 8170 27.9 26.4 106 48.1 45.6 105 Canyon 7870 .2 -M * 20.6 -M * Madison Plateau 7750 9.8 7.6 129 33.4 32.0 104 West Yellowstone 6700 .0 .0 * 21.4 18.3 117 Whiskey Creek 6800 1.5 .0 * 28.9 26.2 110 ----- ----- Basin Index (%) 115 108 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 12.6 18.4 68 22.0 27.2 81 Canyon 7870 .2 -M * 20.6 -M * Evening Star 9200 7.6 17.9 42 33.4 36.2 92 Fisher Creek 9100 -M 29.9 * 39.9 42.4 94 Monument Peak 8850 2.2 13.6 16 28.1 28.4 99 Northeast Entrance 7350 .0 .0 * 15.2 17.4 87 Parker Peak 9400 7.5 13.6 55 28.5 25.4 112 Sylvan Lake 8420 .1 4.9 2 27.7 29.9 93 Thumb Divide 7980 .1 .0 * 22.2 23.4 95 Two Ocean Plateau 9240 18.2 25.2 72 31.9 33.2 96 White Mill 8700 10.5 17.4 60 26.9 29.0 93 Wolverine 7650 .0 .0 * 15.4 16.5 93 ----- ----- Basin Index (%) 53 94 WIND RIVER Burroughs Creek 8750 .0 -M * 13.3 -M * Castle Creek 8400 .0 .0 * 9.7 13.4 72 Cold Springs 9630 .0 .0 * 13.6 16.0 85 Deer Park 9700 8.2 3.8 216 30.9 24.8 125 Hobbs Park 10100 6.0 5.4 111 22.9 20.6 111 Kirwin 9550 .0 .4 0* 17.6 18.4 96 Little Warm 9370 .0 .0 * 15.9 17.0 94 South Pass 9040 .7 .3 233* 26.0 21.2 123 St. Lawrence Alt 8620 .0 -M * 15.2 -M * Togwotee Pass 9580 7.6 18.5 41 24.9 31.0 80 Townsend Creek 8700 .0 .0 * 19.6 18.0 109 ----- ----- Basin Index (%) 79* 100 BIGHORN BASIN Bald Mtn. 9380 4.8 13.4 36 19.3 22.6 85 Bear Trap Meadow 8200 .0 .0 * 13.4 14.3 94 Bone Springs Div 9350 .0 7.6 0 16.2 21.3 76 Grave Springs 8550 .0 .0 * 15.4 14.7 105 Kirwin 9550 .0 .4 0* 17.6 18.4 96 Marquette 8760 .0 .0 * 15.8 17.7 89 Middle Powder 7760 .0 .0 * 15.1 16.2 93 Owl Creek 8975 .0 .0 * 12.5 11.4 110 Powder River Pass 9480 .0 .0 * 17.2 19.2 90 Shell Creek 9580 .0 8.3 0 17.7 19.6 90 Timber Creek 7950 .1 .0 * 12.1 14.0 86 ----- ----- Basin Index (%) 16* 91 SHOSHONE RIVER Blackwater 9780 9.9 19.6 51 27.2 30.2 90 Evening Star 9200 7.6 17.9 42 33.4 36.2 92 Marquette 8760 .0 .0 * 15.8 17.7 89 Sylvan Lake 8420 .1 4.9 2 27.7 29.9 93 Sylvan Road 7120 .0 .0 * 17.2 21.1 82 Younts Peak 8350 .0 .0 * 16.6 20.3 82 ----- ----- Basin Index (%) 42 89 POWDER RIVER Bear Trap Meadow 8200 .0 .0 * 13.4 14.3 94 Cloud Peak Reservoir 9860 .6 5.9 10 21.3 22.0 97 Grave Springs 8550 .0 .0 * 15.4 14.7 105 Hansen Sawmill 8360 .0 .0 * 13.8 15.0 92 Middle Powder 7760 .0 .0 * 15.1 16.2 93 Powder River Pass 9480 .0 .0 * 17.2 19.2 90 Soldier Park 8720 .0 .0 * 13.2 16.0 82 ----- ----- Basin Index (%) 10* 93 TONGUE RIVER Big Goose 7990 .0 .0 * 15.0 19.4 77 Bone Springs Div 9350 .0 7.6 0 16.2 21.3 76 Burgess Junction 7880 .0 .0 * 17.9 18.3 98 Dome Lake 8880 .0 .0 * 17.2 20.8 83 Little Goose 8870 .0 1.0 0* 16.6 21.2 78 Sucker Creek 8880 .0 .2 0* 21.4 21.8 98 Tie Creek 6870 .0 .0 * 18.9 19.2 98 ----- ----- Basin Index (%) 0* 87 BELLE FOURCHE Blind Park 6890 .0 .0 * 16.2 17.4 93 Cole Canyon 5910 .0 .0 * 16.1 16.5 98 North Rapid Creek 6130 .1 .0 * 14.3 15.0 95 ----- ----- Basin Index (%) * 95 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 16.2 17.4 93 North Rapid Creek 6130 .1 .0 * 14.3 15.0 95 ----- ----- Basin Index (%) * 94 UPPER N. PLATTE Arapaho Ridge 10976 11.8 11.2 105 29.8 28.6 104 Blackhall Mtn 9839 12.4 24.7 50 42.9 41.2 104 Cinnabar Park 9707 .0 1.6 0* 27.1 29.4 92 Columbine 9167 -M .0 * 31.2 31.8 98 Divide Peak 8730 .0 .0 * 33.2 26.8 124 Joe Wright 10158 12.9 13.3 97 33.3 34.6 96 Laprele Creek 8390 .0 .0 * 17.6 18.0 98 Med Bow 10512 23.8 -M * 40.9 -M * Never Summer 10323 17.2 16.8 102 23.9 23.6 101 North French Creek 10153 11.0 19.8 56 34.9 37.0 94 Old Battle 9860 31.2 25.3 123 47.1 42.8 110 Rawah 9069 .0 .0 * 21.5 21.1 102 Sage Creek Basin 7850 .0 .0 * 23.1 16.9 137 Sand Lake 10098 20.8 23.2 90 34.5 33.3 104 South Brush Creek 8495 .0 .0 * 17.6 19.8 89 Tower 10620 30.7 33.6 91 57.2 50.3 114 Webber Springs 9260 7.8 .0 * 35.8 32.8 109 Whiskey Park 9020 3.9 6.6 59 39.4 36.4 108 Willow Creek Pass 9523 .6 .8 75* 21.3 18.4 116 Zirkel 9338 -M .0 * 38.4 36.4 105 ----- ----- Basin Index (%) 91* 105 SWEETWATER Deer Park 9700 8.2 3.8 216 30.9 24.8 125 Larsen Creek 9000 -M .0 * 18.6 17.2 108 South Pass 9040 .7 .3 233* 26.0 21.2 123 ----- ----- Basin Index (%) 217* 119 LOWER N. PLATTE Casper Mtn. 7920 .0 .0 * 21.7 21.1 103 Laprele Creek 8390 .0 .0 * 17.6 18.0 98 Reno Hill 8430 .0 .0 * 23.4 23.2 101 Windy Peak 7915 .0 .0 * 16.4 16.6 99 ----- ----- Basin Index (%) * 100 LARAMIE RIVER Brooklyn Lake 10250 .2 4.4 5 31.0 28.9 107 Cinnabar Park 9707 .0 1.6 0* 27.1 29.4 92 Crow Creek 8335 .0 .0 * 13.1 16.0 82 Deadman Hill 10239 5.2 8.0 65 24.9 24.2 103 Rawah 9069 .0 .0 * 21.5 21.1 102 Roach 9740 .2 1.1 18* 26.2 24.8 106 Windy Peak 7915 .0 .0 * 16.4 16.6 99 ----- ----- Basin Index (%) 37* 100 S. PLATTE Crow Creek 8335 .0 .0 * 13.1 16.0 82 ----- ----- Basin Index (%) * 82 LITTLE SNAKE RIVER Battle Mountain 7498 .0 .0 * 24.4 19.8 123 Divide Peak 8730 .0 .0 * 33.2 26.8 124 Elk River 8739 -M .0 * 30.5 24.6 124 Elkhead Divide 8800 .2 -M * 34.4 -M * Little Snake River 8928 5.4 1.5 360* 47.2 40.8 116 Old Battle 9860 31.2 25.3 123 47.1 42.8 110 Sage Creek Basin 7850 .0 .0 * 23.1 16.9 137 Sandstone RS 8152 .0 .0 * 27.6 22.2 124 Whiskey Park 9020 3.9 6.6 59 39.4 36.4 108 ----- ----- Basin Index (%) 121* 118 UPPER GREEN RIVER Big Sandy Opening 9080 -M .0 * 18.9 17.4 109 Blind Bull Sum 8650 12.7 15.7 81 21.6 23.2 93 East Rim Divide 7930 -M .0 * 14.9 15.2 98 Elkhart Park G.S. 9400 -M .0 * 15.0 17.4 86 Gros Ventre Summit 8750 -M .0 * 14.0 16.1 87 Gunsight Pass 9820 .4 4.6 9 16.6 18.2 91 Indian Creek 9425 11.5 11.6 99 28.4 26.2 108 Kendall R.S. 7740 .0 .0 * 15.8 17.4 91 Larsen Creek 9000 -M .0 * 18.6 17.2 108 Loomis Park 8240 .2 .0 * 19.4 21.8 89 New Fork Lake 8340 -M .0 * -M 15.4 * Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 -M .0 * 19.2 18.2 105 Spring Creek Divide 9000 -M 13.0 * -M 29.6 * Triple Peak 8500 1.7 .0 * 29.6 32.2 92 ----- ----- Basin Index (%) 83* 96 LOWER GREEN RIVER Blacks Fork Jct 8869 .4 .0 * 17.2 15.7 110 Buck Pasture 9632 .0 -M * 25.2 -M * EF Blacks Fork GS 9360 .0 .0 * 17.7 16.8 105 Hams Fork 7840 -M .0 * 18.4 14.9 123 Henrys Fork 10182 -M -M * 18.1 -M * Hewinta 9500 .0 .0 * 19.8 18.0 110 Hickerson Park 9122 .0 .0 * 14.7 14.4 102 Hole-in-Rock 9168 -M .0 * -M 14.2 * Indian Creek 9425 11.5 11.6 99 28.4 26.2 108 Kelley R.S. 8180 .0 .0 * 26.2 22.4 117 Spirit Lk 10235 .3 .0 * 25.2 20.6 122 Steel Creek Park 10158 7.8 7.6 103 23.8 21.5 111 ----- ----- Basin Index (%) 104* 112 UPPER BEAR RIVER Bear River RS 8777 .0 .0 * 18.5 15.2 122 Bug Lake 7987 .0 .0 * 30.0 22.2 135 Burts Miller Ranch 8000 .3 .0 * 16.4 9.9 166 Chalk Creek #1 9171 6.4 1.9 337* 35.7 29.8 120 Giveout 6930 .0 .0 * 19.1 16.8 114 Hayden Fork 9130 .0 .0 * 31.3 25.8 121 Kelley R.S. 8180 .0 .0 * 26.2 22.4 117 Lily Lake 9133 .3 .0 * 20.4 21.3 96 Monte Cristo 8932 15.9 4.2 379 44.5 31.4 142 Salt River Summit 7640 -M .0 * 23.7 20.6 115 Spring Creek Divide 9000 -M 13.0 * -M 29.6 * Trial Lake 9992 14.1 4.0 352 38.4 28.0 137 ----- ----- Basin Index (%) 366* 125 ----------------------------------------------------------------------------- -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.