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: MAY 12 , 2022 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 6.2 4.2 148 20.2 23.6 86 Blind Bull Sum 8650 23.5 24.2 97 16.9 20.4 83 Cottonwood Creek 7670 14.5 14.0 104 28.9 29.8 97 East Rim Divide 7930 .1 .6 17* 12.4 13.6 91 Grand Targhee 9260 36.6 46.8 78 32.2 37.2 87 Granite Creek 6770 2.5 4.5 56 -M 21.4 * Grassy Lake 7265 21.2 21.4 99 35.7 39.8 90 Gros Ventre Summit 8750 7.5 9.4 80 13.3 15.1 88 Gunsight Pass 9820 13.4 12.3 109 16.8 17.3 97 Lewis Lake Divide 7850 21.6 29.1 74 35.6 38.8 92 Loomis Park 8240 5.6 6.8 82 17.8 19.9 89 Phillips Bench 8200 20.7 23.1 90 27.6 30.2 91 Salt River Summit 7640 6.3 3.3 191 18.4 18.8 98 Snake River Station 6920 1.9 1.6 119* 21.0 26.0 81 Somsen Ranch 6800 .0 .0 * -M 19.2 * Spring Creek Divide 9000 22.4 23.7 95 26.3 27.0 97 Thumb Divide 7980 11.7 6.8 172 21.3 22.2 96 Togwotee Pass 9580 22.5 25.8 87 25.2 28.8 88 Triple Peak 8500 18.6 16.4 113 29.6 29.8 99 Two Ocean Plateau 9240 30.9 33.0 94 29.5 30.6 96 Willow Creek 8080 24.7 22.4 110 38.1 39.4 97 Younts Peak 8350 9.2 12.5 74 13.7 18.0 76 ----- ----- Basin Index (%) 94 91 MADISON HEADWATERS IN WYOMING Black Bear 8170 31.6 40.5 78 35.2 42.0 84 Canyon 7870 9.6 -M * 15.5 -M * Madison Plateau 7750 18.3 21.2 86 25.2 30.1 84 West Yellowstone 6700 .0 .0 * 15.7 16.3 96 Whiskey Creek 6800 11.0 9.4 117 -M 23.4 * ----- ----- Basin Index (%) 86 86 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 20.6 24.2 85 20.1 24.6 82 Canyon 7870 9.6 -M * 15.5 -M * Evening Star 9200 28.4 26.5 107 28.4 33.2 86 Fisher Creek 9100 33.2 36.2 92 36.6 39.4 93 Monument Peak 8850 20.7 21.1 98 26.0 26.6 98 Northeast Entrance 7350 .0 .0 * 13.7 15.2 90 Parker Peak 9400 23.0 23.2 99 23.6 23.4 101 Sylvan Lake 8420 14.5 17.0 85 25.1 27.4 92 Thumb Divide 7980 11.7 6.8 172 21.3 22.2 96 Two Ocean Plateau 9240 30.9 33.0 94 29.5 30.6 96 White Mill 8700 23.4 26.6 88 24.0 26.5 91 Wolverine 7650 1.1 .0 * 15.2 14.8 103 ----- ----- Basin Index (%) 97 93 WIND RIVER Burroughs Creek 8750 6.5 -M * 16.8 -M * Castle Creek 8400 .0 .0 * -M 10.8 * Cold Springs 9630 6.3 2.0 315 16.0 13.0 123 Deer Park 9700 14.3 14.3 100 21.1 23.2 91 Hobbs Park 10100 19.3 16.0 121 21.3 18.2 117 Kirwin 9550 13.7 11.6 118 17.0 16.0 106 Little Warm 9370 10.9 7.4 147 17.2 14.8 116 South Pass 9040 11.1 13.2 84 18.1 19.5 93 St. Lawrence Alt 8620 .1 -M * 12.3 -M * Togwotee Pass 9580 22.5 25.8 87 25.2 28.8 88 Townsend Creek 8700 9.3 4.1 227 16.9 15.5 109 ----- ----- Basin Index (%) 114 103 BIGHORN BASIN Bald Mtn. 9380 18.6 21.2 88 17.9 19.8 90 Bear Trap Meadow 8200 .1 .2 50* 12.6 12.4 102 Bone Springs Div 9350 18.1 17.6 103 16.6 18.9 88 Grave Springs 8550 7.8 6.4 122 13.8 12.8 108 Kirwin 9550 13.7 11.6 118 17.0 16.0 106 Marquette 8760 5.6 8.3 67 12.4 14.0 89 Middle Powder 7760 9.8 8.8 111 13.6 13.4 101 Owl Creek 8975 .4 .5 80* 10.2 9.4 109 Powder River Pass 9480 7.5 9.0 83 12.3 16.8 73 Shell Creek 9580 -M 16.7 * -M 17.3 * Timber Creek 7950 .3 1.0 30 11.5 11.7 98 ----- ----- Basin Index (%) 97 95 SHOSHONE RIVER Blackwater 9780 24.9 24.0 104 26.4 26.8 99 Evening Star 9200 28.4 26.5 107 28.4 33.2 86 Marquette 8760 5.6 8.3 67 12.4 14.0 89 Sylvan Lake 8420 14.5 17.0 85 25.1 27.4 92 Sylvan Road 7120 .1 .0 * -M 19.1 * Younts Peak 8350 9.2 12.5 74 13.7 18.0 76 ----- ----- Basin Index (%) 94 89 POWDER RIVER Bear Trap Meadow 8200 .1 .2 50* 12.6 12.4 102 Cloud Peak Reservoir 9860 15.7 16.0 98 19.2 18.8 102 Grave Springs 8550 7.8 6.4 122 13.8 12.8 108 Hansen Sawmill 8360 .3 1.4 21 12.8 12.3 104 Middle Powder 7760 9.8 8.8 111 13.6 13.4 101 Powder River Pass 9480 7.5 9.0 83 12.3 16.8 73 Soldier Park 8720 1.1 .7 157* 13.2 12.0 110 ----- ----- Basin Index (%) 100 99 TONGUE RIVER Big Goose 7990 7.7 8.2 94 15.4 15.7 98 Bone Springs Div 9350 18.1 17.6 103 16.6 18.9 88 Burgess Junction 7880 12.6 10.4 121 17.5 16.0 109 Dome Lake 8880 13.1 10.6 124 18.0 18.2 99 Little Goose 8870 9.9 9.4 105 18.5 16.9 109 Sucker Creek 8880 13.4 12.2 110 21.4 19.1 112 Tie Creek 6870 .2 .2 100* 16.5 15.8 104 ----- ----- Basin Index (%) 109 103 BELLE FOURCHE Blind Park 6890 .0 .0 * 14.2 14.4 99 Cole Canyon 5910 .0 .0 * 14.1 13.6 104 North Rapid Creek 6130 1.4 .0 * 8.9 12.2 73 ----- ----- Basin Index (%) * 93 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 14.2 14.4 99 North Rapid Creek 6130 1.4 .0 * 8.9 12.2 73 ----- ----- Basin Index (%) * 87 UPPER N. PLATTE Arapaho Ridge 10976 18.3 22.4 82 25.0 27.1 92 Blackhall Mtn 9839 27.2 33.3 82 34.6 38.3 90 Cinnabar Park 9707 11.6 16.6 70 24.1 27.8 87 Columbine 9167 9.3 10.8 86 29.6 30.4 97 Divide Peak 8730 7.0 12.6 56 23.9 25.6 93 Joe Wright 10158 23.1 22.4 103 35.8 32.4 110 Laprele Creek 8390 .0 .9 0* 14.6 16.0 91 Med Bow 10512 36.8 -M * 35.9 -M * Never Summer 10323 23.3 22.2 105 21.9 21.5 102 North French Creek 10153 26.9 32.3 83 31.5 35.1 90 Old Battle 9860 31.1 37.2 84 36.0 41.2 87 Rawah 9069 5.0 3.2 156 19.9 20.2 99 Sage Creek Basin 7850 -M .0 * 13.0 16.1 81 Sand Lake 10098 29.8 32.1 93 31.6 31.5 100 South Brush Creek 8495 .4 .7 57* 15.7 18.6 84 Tower 10620 43.8 48.4 90 47.8 47.8 100 Webber Springs 9260 16.4 17.4 94 29.5 31.6 93 Whiskey Park 9020 28.7 26.0 110 33.8 35.2 96 Willow Creek Pass 9523 12.5 13.6 92 18.1 16.8 108 Zirkel 9338 12.0 18.8 64 36.3 35.6 102 ----- ----- Basin Index (%) 88 95 SWEETWATER Deer Park 9700 14.3 14.3 100 21.1 23.2 91 Larsen Creek 9000 -M .2 * 15.4 16.5 93 South Pass 9040 11.1 13.2 84 18.1 19.5 93 ----- ----- Basin Index (%) 92 92 LOWER N. PLATTE Casper Mtn. 7920 7.7 9.7 79 19.5 18.3 107 Laprele Creek 8390 .0 .9 0* 14.6 16.0 91 Reno Hill 8430 11.1 9.4 118 22.0 21.2 104 Windy Peak 7915 .2 .0 * 13.0 14.3 91 ----- ----- Basin Index (%) 95 99 LARAMIE RIVER Brooklyn Lake 10250 16.3 20.8 78 27.0 27.2 99 Cinnabar Park 9707 11.6 16.6 70 24.1 27.8 87 Crow Creek 8335 .0 .0 * 11.9 13.8 86 Deadman Hill 10239 19.1 18.5 103 23.5 23.2 101 Rawah 9069 5.0 3.2 156 19.9 20.2 99 Roach 9740 11.7 14.6 80 24.3 22.8 107 Windy Peak 7915 .2 .0 * 13.0 14.3 91 ----- ----- Basin Index (%) 87 96 S. PLATTE Crow Creek 8335 .0 .0 * 11.9 13.8 86 ----- ----- Basin Index (%) * 86 LITTLE SNAKE RIVER Battle Mountain 7498 .2 .0 * 18.3 18.4 99 Divide Peak 8730 7.0 12.6 56 23.9 25.6 93 Elk River 8739 4.6 5.0 92 25.5 23.5 109 Elkhead Divide 8800 9.5 -M * 24.9 -M * Little Snake River 8928 15.5 20.6 75 35.7 39.0 92 Old Battle 9860 31.1 37.2 84 36.0 41.2 87 Sage Creek Basin 7850 -M .0 * 13.0 16.1 81 Sandstone RS 8152 .0 .6 0* 18.2 20.7 88 Whiskey Park 9020 28.7 26.0 110 33.8 35.2 96 ----- ----- Basin Index (%) 85 93 UPPER GREEN RIVER Big Sandy Opening 9080 9.5 9.2 103 15.5 15.8 98 Blind Bull Sum 8650 23.5 24.2 97 16.9 20.4 83 East Rim Divide 7930 .1 .6 17* 12.4 13.6 91 Elkhart Park G.S. 9400 6.2 9.4 66 12.0 15.1 79 Gros Ventre Summit 8750 7.5 9.4 80 13.3 15.1 88 Gunsight Pass 9820 13.4 12.3 109 16.8 17.3 97 Indian Creek 9425 21.4 21.2 101 22.5 23.2 97 Kendall R.S. 7740 .0 .0 * 15.6 15.6 100 Larsen Creek 9000 -M .2 * 15.4 16.5 93 Loomis Park 8240 5.6 6.8 82 17.8 19.9 89 New Fork Lake 8340 .6 2.7 22 11.1 13.0 85 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 .0 3.5 0 17.7 16.0 111 Spring Creek Divide 9000 22.4 23.7 95 26.3 27.0 97 Triple Peak 8500 18.6 16.4 113 29.6 29.8 99 ----- ----- Basin Index (%) 92 94 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 .0 * 15.0 15.1 99 Buck Pasture 9632 4.8 -M * 19.8 -M * EF Blacks Fork GS 9360 .0 3.0 0 14.6 14.4 101 Hams Fork 7840 .0 .0 * 13.2 13.8 96 Henrys Fork 10182 -M -M * 14.1 -M * Hewinta 9500 .0 1.0 0* 17.4 17.0 102 Hickerson Park 9122 .0 .2 0* 12.6 13.0 97 Hole-in-Rock 9168 .0 .0 * 12.6 13.1 96 Indian Creek 9425 21.4 21.2 101 22.5 23.2 97 Kelley R.S. 8180 7.3 8.0 91 19.0 19.3 98 Spirit Lk 10235 1.6 9.6 17 18.4 20.0 92 Steel Creek Park 10158 12.9 17.8 72 20.3 20.6 99 ----- ----- Basin Index (%) 71 98 UPPER BEAR RIVER Bear River RS 8777 .0 .0 * 16.1 14.4 112 Bug Lake 7987 8.0 12.1 66 21.5 20.0 108 Burts Miller Ranch 8000 .0 .0 * 9.6 8.8 109 Chalk Creek #1 9171 15.9 19.4 82 26.8 27.7 97 Giveout 6930 .2 .0 * 14.1 15.0 94 Hayden Fork 9130 .0 3.8 0 24.8 24.3 102 Kelley R.S. 8180 7.3 8.0 91 19.0 19.3 98 Lily Lake 9133 .6 5.0 12 18.4 19.8 93 Monte Cristo 8932 16.0 20.8 77 28.8 29.4 98 Salt River Summit 7640 6.3 3.3 191 18.4 18.8 98 Spring Creek Divide 9000 22.4 23.7 95 26.3 27.0 97 Trial Lake 9992 12.6 20.9 60 25.3 26.5 95 ----- ----- Basin Index (%) 76 99 ----------------------------------------------------------------------------- -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.