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 SUNDAY: MAY 22 , 2022 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 .0 .0 * 20.9 24.8 84 Blind Bull Sum 8650 23.6 20.8 113 17.5 21.2 83 Cottonwood Creek 7670 8.7 5.8 150 29.9 30.4 98 East Rim Divide 7930 .0 .0 * 12.8 14.1 91 Grand Targhee 9260 31.4 43.8 72 32.9 38.8 85 Granite Creek 6770 .0 .0 * 17.3 22.7 76 Grassy Lake 7265 15.3 14.1 109 36.3 41.7 87 Gros Ventre Summit 8750 2.1 3.8 55 13.8 15.8 87 Gunsight Pass 9820 10.9 9.4 116 17.3 17.6 98 Lewis Lake Divide 7850 16.6 21.0 79 37.1 39.5 94 Loomis Park 8240 .2 .3 67* 18.5 20.8 89 Phillips Bench 8200 15.7 17.6 89 28.2 31.2 90 Salt River Summit 7640 .0 .0 * 18.7 19.2 97 Snake River Station 6920 .1 .0 * 21.4 27.6 78 Somsen Ranch 6800 .0 .0 * -M 20.0 * Spring Creek Divide 9000 19.9 19.8 101 27.5 28.0 98 Thumb Divide 7980 6.3 .4 1575* 22.3 22.6 99 Togwotee Pass 9580 22.1 22.8 97 27.1 29.8 91 Triple Peak 8500 14.0 8.7 161 31.4 30.7 102 Two Ocean Plateau 9240 30.3 28.2 107 31.1 32.2 97 Willow Creek 8080 17.3 15.0 115 38.8 40.8 95 Younts Peak 8350 2.0 5.0 40 15.6 18.8 83 ----- ----- Basin Index (%) 100 91 MADISON HEADWATERS IN WYOMING Black Bear 8170 29.0 33.4 87 35.8 43.6 82 Canyon 7870 5.8 -M * 16.5 -M * Madison Plateau 7750 13.3 13.4 99 25.8 30.8 84 West Yellowstone 6700 .0 .0 * 16.3 17.3 94 Whiskey Creek 6800 6.2 3.6 172 -M 24.8 * ----- ----- Basin Index (%) 96 85 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 20.9 21.6 97 21.7 25.6 85 Canyon 7870 5.8 -M * 16.5 -M * Evening Star 9200 29.1 21.4 136 31.3 34.0 92 Fisher Creek 9100 33.8 34.9 97 38.9 41.4 94 Monument Peak 8850 19.6 18.0 109 27.8 27.8 100 Northeast Entrance 7350 .0 .0 * 15.5 16.5 94 Parker Peak 9400 23.7 18.5 128 26.3 24.4 108 Sylvan Lake 8420 12.5 11.6 108 27.2 28.6 95 Thumb Divide 7980 6.3 .4 1575* 22.3 22.6 99 Two Ocean Plateau 9240 30.3 28.2 107 31.1 32.2 97 White Mill 8700 23.3 22.6 103 26.1 27.8 94 Wolverine 7650 .0 .0 * 16.8 15.6 108 ----- ----- Basin Index (%) 113 96 WIND RIVER Burroughs Creek 8750 1.7 -M * 17.6 -M * Castle Creek 8400 .0 .0 * -M 12.0 * Cold Springs 9630 .4 .0 * 16.6 13.8 120 Deer Park 9700 10.6 9.2 115 21.9 24.3 90 Hobbs Park 10100 16.8 12.8 131 22.3 19.4 115 Kirwin 9550 10.9 7.5 145 18.4 17.2 107 Little Warm 9370 6.9 1.4 493 17.5 15.8 111 South Pass 9040 6.1 7.5 81 18.6 20.6 90 St. Lawrence Alt 8620 .0 -M * 12.8 -M * Togwotee Pass 9580 22.1 22.8 97 27.1 29.8 91 Townsend Creek 8700 2.6 .0 * 17.7 16.6 107 ----- ----- Basin Index (%) 125 102 BIGHORN BASIN Bald Mtn. 9380 18.0 17.7 102 19.3 20.5 94 Bear Trap Meadow 8200 .0 .0 * 13.3 12.8 104 Bone Springs Div 9350 15.8 13.2 120 17.6 19.7 89 Grave Springs 8550 3.4 .6 567* 13.8 13.4 103 Kirwin 9550 10.9 7.5 145 18.4 17.2 107 Marquette 8760 1.2 2.4 50 13.4 15.8 85 Middle Powder 7760 6.0 1.9 316 14.5 14.4 101 Owl Creek 8975 .5 .0 * 10.9 9.9 110 Powder River Pass 9480 4.6 4.2 110 13.0 17.5 74 Shell Creek 9580 15.4 14.3 108 18.5 18.3 101 Timber Creek 7950 .5 .0 * 12.6 12.5 101 ----- ----- Basin Index (%) 123 96 SHOSHONE RIVER Blackwater 9780 26.7 22.6 118 29.6 28.4 104 Evening Star 9200 29.1 21.4 136 31.3 34.0 92 Marquette 8760 1.2 2.4 50 13.4 15.8 85 Sylvan Lake 8420 12.5 11.6 108 27.2 28.6 95 Sylvan Road 7120 .0 .0 * -M 19.4 * Younts Peak 8350 2.0 5.0 40 15.6 18.8 83 ----- ----- Basin Index (%) 113 93 POWDER RIVER Bear Trap Meadow 8200 .0 .0 * 13.3 12.8 104 Cloud Peak Reservoir 9860 12.9 12.0 108 20.1 20.0 100 Grave Springs 8550 3.4 .6 567* 13.8 13.4 103 Hansen Sawmill 8360 .1 .0 * 12.9 13.4 96 Middle Powder 7760 6.0 1.9 316 14.5 14.4 101 Powder River Pass 9480 4.6 4.2 110 13.0 17.5 74 Soldier Park 8720 .2 .0 * 13.6 13.2 103 ----- ----- Basin Index (%) 145* 97 TONGUE RIVER Big Goose 7990 3.8 2.2 173 16.3 16.6 98 Bone Springs Div 9350 15.8 13.2 120 17.6 19.7 89 Burgess Junction 7880 10.2 5.0 204 18.8 17.0 111 Dome Lake 8880 9.4 4.8 196 19.2 19.8 97 Little Goose 8870 6.7 4.8 140 19.8 18.0 110 Sucker Creek 8880 10.0 7.2 139 22.8 21.2 108 Tie Creek 6870 .6 .0 * 18.0 17.4 103 ----- ----- Basin Index (%) 152 102 BELLE FOURCHE Blind Park 6890 .0 .0 * 16.0 15.2 105 Cole Canyon 5910 .0 .0 * 16.0 14.2 113 North Rapid Creek 6130 -M .0 * 9.8 13.4 73 ----- ----- Basin Index (%) * 98 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 16.0 15.2 105 North Rapid Creek 6130 -M .0 * 9.8 13.4 73 ----- ----- Basin Index (%) * 90 UPPER N. PLATTE Arapaho Ridge 10976 11.7 18.6 63 25.6 28.4 90 Blackhall Mtn 9839 18.7 28.9 65 36.1 39.8 91 Cinnabar Park 9707 4.8 10.4 46 25.1 29.0 87 Columbine 9167 .0 .4 0* 29.8 31.2 96 Divide Peak 8730 .0 3.2 0 24.3 26.2 93 Joe Wright 10158 17.7 18.1 98 37.2 34.0 109 Laprele Creek 8390 .0 .0 * 15.2 16.8 90 Med Bow 10512 31.3 -M * 37.3 -M * Never Summer 10323 21.6 19.2 112 23.0 22.4 103 North French Creek 10153 21.2 27.4 77 33.0 36.2 91 Old Battle 9860 26.8 32.0 84 36.9 42.0 88 Rawah 9069 .5 .4 125* 21.4 20.4 105 Sage Creek Basin 7850 -M .0 * 13.4 16.7 80 Sand Lake 10098 26.1 27.0 97 32.7 32.4 101 South Brush Creek 8495 .4 .0 * 16.6 19.1 87 Tower 10620 36.0 41.2 87 48.7 49.5 98 Webber Springs 9260 9.1 8.9 102 30.4 32.2 94 Whiskey Park 9020 -M 20.4 * 34.9 36.0 97 Willow Creek Pass 9523 6.3 9.6 66 19.2 18.0 107 Zirkel 9338 2.1 7.2 29 37.2 35.9 104 ----- ----- Basin Index (%) 80 95 SWEETWATER Deer Park 9700 10.6 9.2 115 21.9 24.3 90 Larsen Creek 9000 -M .0 * 15.8 16.9 93 South Pass 9040 6.1 7.5 81 18.6 20.6 90 ----- ----- Basin Index (%) 100 91 LOWER N. PLATTE Casper Mtn. 7920 1.6 1.8 89 20.0 19.1 105 Laprele Creek 8390 .0 .0 * 15.2 16.8 90 Reno Hill 8430 6.7 3.2 209 22.9 21.9 105 Windy Peak 7915 .2 .0 * 13.6 14.8 92 ----- ----- Basin Index (%) 170 99 LARAMIE RIVER Brooklyn Lake 10250 8.7 14.2 61 28.0 28.1 100 Cinnabar Park 9707 4.8 10.4 46 25.1 29.0 87 Crow Creek 8335 .3 .0 * 12.8 14.6 88 Deadman Hill 10239 9.4 15.6 60 24.5 24.0 102 Rawah 9069 .5 .4 125* 21.4 20.4 105 Roach 9740 4.2 9.0 47 25.1 24.2 104 Windy Peak 7915 .2 .0 * 13.6 14.8 92 ----- ----- Basin Index (%) 57 97 S. PLATTE Crow Creek 8335 .3 .0 * 12.8 14.6 88 ----- ----- Basin Index (%) * 88 LITTLE SNAKE RIVER Battle Mountain 7498 .0 .0 * 19.1 19.2 99 Divide Peak 8730 .0 3.2 0 24.3 26.2 93 Elk River 8739 .1 .0 * 26.0 23.9 109 Elkhead Divide 8800 .1 -M * 25.4 -M * Little Snake River 8928 7.1 11.2 63 36.7 39.6 93 Old Battle 9860 26.8 32.0 84 36.9 42.0 88 Sage Creek Basin 7850 -M .0 * 13.4 16.7 80 Sandstone RS 8152 .0 .0 * 18.8 21.7 87 Whiskey Park 9020 -M 20.4 * 34.9 36.0 97 ----- ----- Basin Index (%) 73* 93 UPPER GREEN RIVER Big Sandy Opening 9080 4.4 .9 489* 15.9 16.4 97 Blind Bull Sum 8650 23.6 20.8 113 17.5 21.2 83 East Rim Divide 7930 .0 .0 * 12.8 14.1 91 Elkhart Park G.S. 9400 1.0 3.8 26 12.2 16.6 73 Gros Ventre Summit 8750 2.1 3.8 55 13.8 15.8 87 Gunsight Pass 9820 10.9 9.4 116 17.3 17.6 98 Indian Creek 9425 16.4 16.8 98 23.2 24.6 94 Kendall R.S. 7740 .0 .0 * 16.2 16.2 100 Larsen Creek 9000 -M .0 * 15.8 16.9 93 Loomis Park 8240 .2 .3 67* 18.5 20.8 89 New Fork Lake 8340 .0 .0 * 11.6 13.8 84 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 .0 .0 * 18.8 16.6 113 Spring Creek Divide 9000 19.9 19.8 101 27.5 28.0 98 Triple Peak 8500 14.0 8.7 161 31.4 30.7 102 ----- ----- Basin Index (%) 110 94 LOWER GREEN RIVER Blacks Fork Jct 8869 .2 .0 * 15.5 15.4 101 Buck Pasture 9632 .0 -M * 20.9 -M * EF Blacks Fork GS 9360 -M .0 * 17.3 16.4 105 Hams Fork 7840 .0 .0 * 13.6 14.4 94 Henrys Fork 10182 -M -M * 14.6 -M * Hewinta 9500 .0 .0 * 18.0 17.2 105 Hickerson Park 9122 .0 .0 * 12.8 13.4 96 Hole-in-Rock 9168 .0 .0 * 13.0 13.4 97 Indian Creek 9425 16.4 16.8 98 23.2 24.6 94 Kelley R.S. 8180 1.7 1.0 170* 19.4 20.8 93 Spirit Lk 10235 .2 2.7 7 17.4 20.5 85 Steel Creek Park 10158 8.0 12.8 62 21.2 21.0 101 ----- ----- Basin Index (%) 80* 97 UPPER BEAR RIVER Bear River RS 8777 .0 .0 * 16.5 14.8 111 Bug Lake 7987 .1 2.0 5 21.6 20.5 105 Burts Miller Ranch 8000 -M .0 * 9.8 9.7 101 Chalk Creek #1 9171 7.1 10.6 67 27.4 29.0 94 Giveout 6930 .0 .0 * 14.6 16.0 91 Hayden Fork 9130 .1 .0 * 25.4 24.8 102 Kelley R.S. 8180 1.7 1.0 170* 19.4 20.8 93 Lily Lake 9133 .1 .0 * 19.0 20.6 92 Monte Cristo 8932 9.8 14.0 70 29.2 29.8 98 Salt River Summit 7640 .0 .0 * 18.7 19.2 97 Spring Creek Divide 9000 19.9 19.8 101 27.5 28.0 98 Trial Lake 9992 2.1 13.4 16 26.3 27.1 97 ----- ----- Basin Index (%) 67* 98 ----------------------------------------------------------------------------- -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.