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 MONDAY: MAY 16 , 2022 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 4.4 1.2 367* 20.7 24.2 86 Blind Bull Sum 8650 23.2 23.2 100 17.2 20.6 83 Cottonwood Creek 7670 13.1 10.2 128 29.3 30.0 98 East Rim Divide 7930 .1 .0 * 12.6 13.8 91 Grand Targhee 9260 35.4 44.6 79 33.1 37.4 89 Granite Creek 6770 .0 1.9 0 16.6 22.0 75 Grassy Lake 7265 20.5 19.8 104 36.4 40.3 90 Gros Ventre Summit 8750 6.4 8.2 78 13.3 15.2 88 Gunsight Pass 9820 13.2 11.6 114 17.1 17.4 98 Lewis Lake Divide 7850 21.1 24.2 87 36.9 39.2 94 Loomis Park 8240 4.2 5.3 79 18.1 20.3 89 Phillips Bench 8200 20.1 21.5 93 28.1 30.7 92 Salt River Summit 7640 4.3 .0 * 18.6 18.9 98 Snake River Station 6920 .1 .0 * 21.3 26.4 81 Somsen Ranch 6800 .0 .0 * -M 19.6 * Spring Creek Divide 9000 21.8 22.6 96 26.6 27.4 97 Thumb Divide 7980 10.2 4.8 212 22.2 22.2 100 Togwotee Pass 9580 23.5 23.7 99 26.5 28.9 92 Triple Peak 8500 17.2 13.4 128 29.9 30.0 100 Two Ocean Plateau 9240 32.8 31.5 104 31.0 31.2 99 Willow Creek 8080 24.2 19.1 127 38.8 40.0 97 Younts Peak 8350 8.2 9.5 86 14.2 18.1 78 ----- ----- Basin Index (%) 103 92 MADISON HEADWATERS IN WYOMING Black Bear 8170 31.4 37.4 84 35.9 42.2 85 Canyon 7870 9.8 -M * 16.2 -M * Madison Plateau 7750 17.8 17.8 100 25.7 30.6 84 West Yellowstone 6700 .0 .0 * 15.9 16.4 97 Whiskey Creek 6800 9.9 7.8 127 -M 24.2 * ----- ----- Basin Index (%) 94 87 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 21.5 24.0 90 21.4 24.8 86 Canyon 7870 9.8 -M * 16.2 -M * Evening Star 9200 30.6 25.2 121 30.5 33.7 91 Fisher Creek 9100 34.2 36.6 93 37.9 40.8 93 Monument Peak 8850 21.2 19.6 108 26.8 27.0 99 Northeast Entrance 7350 .0 .0 * 14.8 16.0 92 Parker Peak 9400 25.4 21.4 119 25.7 23.8 108 Sylvan Lake 8420 15.6 14.8 105 26.8 27.9 96 Thumb Divide 7980 10.2 4.8 212 22.2 22.2 100 Two Ocean Plateau 9240 32.8 31.5 104 31.0 31.2 99 White Mill 8700 24.2 24.9 97 25.1 27.2 92 Wolverine 7650 .3 .0 * 16.2 15.2 107 ----- ----- Basin Index (%) 107 96 WIND RIVER Burroughs Creek 8750 5.5 -M * 17.1 -M * Castle Creek 8400 .1 .0 * -M 11.6 * Cold Springs 9630 4.1 .0 * 16.2 13.4 121 Deer Park 9700 12.9 12.6 102 21.3 23.4 91 Hobbs Park 10100 -M 16.4 * -M 18.8 * Kirwin 9550 13.3 10.6 125 17.9 16.2 110 Little Warm 9370 10.0 5.7 175 17.3 15.0 115 South Pass 9040 -M 10.8 * -M 19.6 * St. Lawrence Alt 8620 .0 -M * 12.4 -M * Togwotee Pass 9580 23.5 23.7 99 26.5 28.9 92 Townsend Creek 8700 6.8 1.9 358 17.0 15.6 109 ----- ----- Basin Index (%) 130 103 BIGHORN BASIN Bald Mtn. 9380 19.2 19.8 97 18.7 20.3 92 Bear Trap Meadow 8200 .1 .0 * 13.3 12.6 106 Bone Springs Div 9350 18.0 16.0 112 17.2 19.3 89 Grave Springs 8550 6.4 4.6 139 14.1 13.1 108 Kirwin 9550 13.3 10.6 125 17.9 16.2 110 Marquette 8760 4.3 5.6 77 12.9 14.9 87 Middle Powder 7760 9.0 6.6 136 14.2 13.5 105 Owl Creek 8975 .2 .0 * 10.5 9.5 111 Powder River Pass 9480 7.0 8.0 88 12.9 17.0 76 Shell Creek 9580 -M 15.6 * -M 17.4 * Timber Creek 7950 .1 .0 * 12.2 12.0 102 ----- ----- Basin Index (%) 109 97 SHOSHONE RIVER Blackwater 9780 27.4 23.0 119 29.2 27.5 106 Evening Star 9200 30.6 25.2 121 30.5 33.7 91 Marquette 8760 4.3 5.6 77 12.9 14.9 87 Sylvan Lake 8420 15.6 14.8 105 26.8 27.9 96 Sylvan Road 7120 .0 .0 * -M 19.2 * Younts Peak 8350 8.2 9.5 86 14.2 18.1 78 ----- ----- Basin Index (%) 110 93 POWDER RIVER Bear Trap Meadow 8200 .1 .0 * 13.3 12.6 106 Cloud Peak Reservoir 9860 15.1 14.7 103 19.5 19.4 101 Grave Springs 8550 6.4 4.6 139 14.1 13.1 108 Hansen Sawmill 8360 .1 .0 * 13.1 12.8 102 Middle Powder 7760 9.0 6.6 136 14.2 13.5 105 Powder River Pass 9480 7.0 8.0 88 12.9 17.0 76 Soldier Park 8720 -M .0 * -M 12.4 * ----- ----- Basin Index (%) 111 99 TONGUE RIVER Big Goose 7990 6.3 6.6 95 15.6 15.8 99 Bone Springs Div 9350 18.0 16.0 112 17.2 19.3 89 Burgess Junction 7880 11.9 9.0 132 18.0 16.4 110 Dome Lake 8880 12.3 8.7 141 18.8 18.9 99 Little Goose 8870 8.9 8.5 105 19.0 17.2 110 Sucker Creek 8880 -M 9.6 * -M 19.6 * Tie Creek 6870 .0 .0 * 17.0 16.0 106 ----- ----- Basin Index (%) 118 102 BELLE FOURCHE Blind Park 6890 .0 .0 * 15.4 14.6 105 Cole Canyon 5910 .0 .0 * 15.4 13.9 111 North Rapid Creek 6130 1.2 .0 * 9.2 12.5 74 ----- ----- Basin Index (%) * 98 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 15.4 14.6 105 North Rapid Creek 6130 1.2 .0 * 9.2 12.5 74 ----- ----- Basin Index (%) * 91 UPPER N. PLATTE Arapaho Ridge 10976 15.0 20.2 74 25.0 28.2 89 Blackhall Mtn 9839 23.4 28.5 82 34.8 39.0 89 Cinnabar Park 9707 8.5 14.8 57 24.1 27.9 86 Columbine 9167 3.9 6.1 64 29.4 30.8 95 Divide Peak 8730 3.1 9.1 34 23.9 25.6 93 Joe Wright 10158 20.0 20.5 98 35.8 32.8 109 Laprele Creek 8390 .0 .0 * 14.7 16.4 90 Med Bow 10512 34.5 -M * 36.0 -M * Never Summer 10323 20.9 20.8 100 21.9 21.9 100 North French Creek 10153 24.7 31.2 79 31.5 35.2 89 Old Battle 9860 29.1 35.1 83 36.1 41.6 87 Rawah 9069 1.4 .3 467* 19.9 20.2 99 Sage Creek Basin 7850 -M .0 * 13.0 16.4 79 Sand Lake 10098 28.0 30.2 93 31.6 31.6 100 South Brush Creek 8495 .3 .0 * 15.8 18.8 84 Tower 10620 41.5 46.6 89 47.8 48.4 99 Webber Springs 9260 12.5 13.8 91 29.6 32.0 92 Whiskey Park 9020 -M 23.8 * 33.8 35.2 96 Willow Creek Pass 9523 9.1 12.0 76 18.1 17.3 105 Zirkel 9338 7.2 13.2 55 36.3 35.6 102 ----- ----- Basin Index (%) 82 94 SWEETWATER Deer Park 9700 12.9 12.6 102 21.3 23.4 91 Larsen Creek 9000 -M .0 * 15.6 16.5 95 South Pass 9040 -M 10.8 * -M 19.6 * ----- ----- Basin Index (%) 102* 92 LOWER N. PLATTE Casper Mtn. 7920 5.3 4.9 108 19.6 18.6 105 Laprele Creek 8390 .0 .0 * 14.7 16.4 90 Reno Hill 8430 9.9 8.2 121 22.4 21.3 105 Windy Peak 7915 .2 .0 * 13.2 14.3 92 ----- ----- Basin Index (%) 118 99 LARAMIE RIVER Brooklyn Lake 10250 13.0 19.0 68 27.0 27.3 99 Cinnabar Park 9707 8.5 14.8 57 24.1 27.9 86 Crow Creek 8335 .0 .0 * 11.8 14.0 84 Deadman Hill 10239 14.1 17.2 82 23.5 23.6 100 Rawah 9069 1.4 .3 467* 19.9 20.2 99 Roach 9740 8.2 12.3 67 24.3 23.6 103 Windy Peak 7915 .2 .0 * 13.2 14.3 92 ----- ----- Basin Index (%) 71 95 S. PLATTE Crow Creek 8335 .0 .0 * 11.8 14.0 84 ----- ----- Basin Index (%) * 84 LITTLE SNAKE RIVER Battle Mountain 7498 .0 .0 * 18.3 18.6 98 Divide Peak 8730 3.1 9.1 34 23.9 25.6 93 Elk River 8739 .0 1.3 0* 25.4 23.6 108 Elkhead Divide 8800 5.3 -M * 24.9 -M * Little Snake River 8928 11.5 15.6 74 35.7 39.4 91 Old Battle 9860 29.1 35.1 83 36.1 41.6 87 Sage Creek Basin 7850 -M .0 * 13.0 16.4 79 Sandstone RS 8152 .0 .0 * 18.2 21.5 85 Whiskey Park 9020 -M 23.8 * 33.8 35.2 96 ----- ----- Basin Index (%) 72* 92 UPPER GREEN RIVER Big Sandy Opening 9080 7.8 7.8 100 15.6 16.0 98 Blind Bull Sum 8650 23.2 23.2 100 17.2 20.6 83 East Rim Divide 7930 .1 .0 * 12.6 13.8 91 Elkhart Park G.S. 9400 5.4 8.4 64 12.2 15.8 77 Gros Ventre Summit 8750 6.4 8.2 78 13.3 15.2 88 Gunsight Pass 9820 13.2 11.6 114 17.1 17.4 98 Indian Creek 9425 20.2 21.2 95 22.8 23.6 97 Kendall R.S. 7740 .0 .0 * 15.8 15.8 100 Larsen Creek 9000 -M .0 * 15.6 16.5 95 Loomis Park 8240 4.2 5.3 79 18.1 20.3 89 New Fork Lake 8340 .2 .2 100* 11.5 13.6 85 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 .0 .0 * 17.8 16.1 111 Spring Creek Divide 9000 21.8 22.6 96 26.6 27.4 97 Triple Peak 8500 17.2 13.4 128 29.9 30.0 100 ----- ----- Basin Index (%) 98 94 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 .0 * 15.2 15.1 101 Buck Pasture 9632 1.5 -M * 20.3 -M * EF Blacks Fork GS 9360 .0 .2 0* 15.4 14.8 104 Hams Fork 7840 .0 .0 * 13.2 14.0 94 Henrys Fork 10182 -M -M * 14.2 -M * Hewinta 9500 .0 .0 * 17.6 17.1 103 Hickerson Park 9122 .0 .0 * 12.6 13.1 96 Hole-in-Rock 9168 .0 .0 * 12.7 13.2 96 Indian Creek 9425 20.2 21.2 95 22.8 23.6 97 Kelley R.S. 8180 5.6 4.2 133 19.1 19.8 96 Spirit Lk 10235 .9 5.8 16 18.4 20.1 92 Steel Creek Park 10158 11.0 15.6 71 20.6 20.8 99 ----- ----- Basin Index (%) 80* 98 UPPER BEAR RIVER Bear River RS 8777 .0 .0 * 16.4 14.4 114 Bug Lake 7987 4.4 9.8 45 21.4 20.2 106 Burts Miller Ranch 8000 .0 .0 * 9.9 9.0 110 Chalk Creek #1 9171 12.6 16.7 75 27.4 28.0 98 Giveout 6930 .2 .0 * 14.2 15.0 95 Hayden Fork 9130 .0 .8 0* 25.1 24.8 101 Kelley R.S. 8180 5.6 4.2 133 19.1 19.8 96 Lily Lake 9133 .0 .7 0* 18.7 20.1 93 Monte Cristo 8932 13.3 18.4 72 29.1 29.7 98 Salt River Summit 7640 4.3 .0 * 18.6 18.9 98 Spring Creek Divide 9000 21.8 22.6 96 26.6 27.4 97 Trial Lake 9992 8.0 18.8 43 25.7 26.9 96 ----- ----- 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.