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 17 , 2022 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 3.4 .6 567* 20.7 24.2 86 Blind Bull Sum 8650 23.3 22.6 103 17.2 20.7 83 Cottonwood Creek 7670 11.9 9.1 131 29.5 30.0 98 East Rim Divide 7930 .0 .0 * 12.5 13.8 91 Grand Targhee 9260 -M 44.2 * 33.0 37.5 88 Granite Creek 6770 .0 1.2 0* -M 22.2 * Grassy Lake 7265 19.4 19.0 102 36.3 40.5 90 Gros Ventre Summit 8750 5.4 7.4 73 13.3 15.2 88 Gunsight Pass 9820 12.6 11.0 115 17.1 17.4 98 Lewis Lake Divide 7850 19.7 23.4 84 37.0 39.2 94 Loomis Park 8240 3.2 4.6 70 18.1 20.4 89 Phillips Bench 8200 19.2 21.0 91 28.1 30.8 91 Salt River Summit 7640 2.8 .0 * 18.6 18.9 98 Snake River Station 6920 .1 .0 * 21.4 26.6 80 Somsen Ranch 6800 .0 .0 * -M 19.6 * Spring Creek Divide 9000 20.9 21.7 96 26.6 27.5 97 Thumb Divide 7980 9.5 3.6 264 22.2 22.3 100 Togwotee Pass 9580 22.9 23.4 98 26.5 29.0 91 Triple Peak 8500 15.9 12.6 126 30.2 30.2 100 Two Ocean Plateau 9240 32.6 30.8 106 31.0 31.2 99 Willow Creek 8080 22.1 18.2 121 38.8 40.0 97 Younts Peak 8350 6.6 9.0 73 14.4 18.2 79 ----- ----- Basin Index (%) 105 92 MADISON HEADWATERS IN WYOMING Black Bear 8170 31.2 36.6 85 35.9 42.8 84 Canyon 7870 9.0 -M * 16.2 -M * Madison Plateau 7750 17.3 16.8 103 25.8 30.6 84 West Yellowstone 6700 .0 .0 * 16.2 16.8 96 Whiskey Creek 6800 9.4 6.9 136 -M 24.2 * ----- ----- Basin Index (%) 96 86 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 21.6 23.6 92 21.4 25.0 86 Canyon 7870 9.0 -M * 16.2 -M * Evening Star 9200 30.3 24.6 123 30.6 33.8 91 Fisher Creek 9100 34.2 36.2 94 38.2 40.9 93 Monument Peak 8850 20.7 19.5 106 27.2 27.2 100 Northeast Entrance 7350 .0 .0 * 15.0 16.2 93 Parker Peak 9400 25.2 20.9 121 25.9 24.0 108 Sylvan Lake 8420 15.2 14.3 106 27.0 27.9 97 Thumb Divide 7980 9.5 3.6 264 22.2 22.3 100 Two Ocean Plateau 9240 32.6 30.8 106 31.0 31.2 99 White Mill 8700 24.1 24.2 100 25.3 27.6 92 Wolverine 7650 .2 .0 * 16.3 15.2 107 ----- ----- Basin Index (%) 108 96 WIND RIVER Burroughs Creek 8750 4.1 -M * 17.2 -M * Castle Creek 8400 .1 .0 * -M 11.6 * Cold Springs 9630 3.1 .0 * 16.3 13.5 121 Deer Park 9700 12.0 12.2 98 21.4 23.4 91 Hobbs Park 10100 17.9 16.0 112 21.6 18.8 115 Kirwin 9550 12.7 10.4 122 18.0 16.3 110 Little Warm 9370 8.9 5.2 171 17.3 15.2 114 South Pass 9040 7.4 9.8 76 18.3 19.6 93 St. Lawrence Alt 8620 .0 -M * 12.4 -M * Togwotee Pass 9580 22.9 23.4 98 26.5 29.0 91 Townsend Creek 8700 5.7 1.4 407 17.0 15.7 108 ----- ----- Basin Index (%) 116 103 BIGHORN BASIN Bald Mtn. 9380 19.1 19.4 98 18.9 20.3 93 Bear Trap Meadow 8200 .1 .0 * 13.3 12.6 106 Bone Springs Div 9350 17.2 15.4 112 17.2 19.4 89 Grave Springs 8550 5.3 4.4 120 14.0 13.2 106 Kirwin 9550 12.7 10.4 122 18.0 16.3 110 Marquette 8760 3.2 5.0 64 13.0 14.9 87 Middle Powder 7760 7.9 5.5 144 14.2 13.6 104 Owl Creek 8975 .2 .0 * 10.5 9.5 111 Powder River Pass 9480 6.2 7.5 83 12.9 17.0 76 Shell Creek 9580 16.0 15.4 104 18.2 17.6 103 Timber Creek 7950 .1 .0 * 12.1 12.0 101 ----- ----- Basin Index (%) 106 98 SHOSHONE RIVER Blackwater 9780 27.1 23.1 117 29.2 27.5 106 Evening Star 9200 30.3 24.6 123 30.6 33.8 91 Marquette 8760 3.2 5.0 64 13.0 14.9 87 Sylvan Lake 8420 15.2 14.3 106 27.0 27.9 97 Sylvan Road 7120 .1 .0 * -M 19.2 * Younts Peak 8350 6.6 9.0 73 14.4 18.2 79 ----- ----- Basin Index (%) 109 93 POWDER RIVER Bear Trap Meadow 8200 .1 .0 * 13.3 12.6 106 Cloud Peak Reservoir 9860 14.1 14.5 97 19.6 19.5 101 Grave Springs 8550 5.3 4.4 120 14.0 13.2 106 Hansen Sawmill 8360 .2 .0 * 13.3 13.2 101 Middle Powder 7760 7.9 5.5 144 14.2 13.6 104 Powder River Pass 9480 6.2 7.5 83 12.9 17.0 76 Soldier Park 8720 .1 .1 100* 13.4 12.8 105 ----- ----- Basin Index (%) 106 99 TONGUE RIVER Big Goose 7990 5.5 6.2 89 15.6 15.8 99 Bone Springs Div 9350 17.2 15.4 112 17.2 19.4 89 Burgess Junction 7880 11.2 8.6 130 18.1 16.4 110 Dome Lake 8880 11.2 8.2 137 18.8 19.0 99 Little Goose 8870 8.0 8.0 100 19.0 17.4 109 Sucker Creek 8880 11.9 9.1 131 22.1 19.9 111 Tie Creek 6870 .1 .0 * 17.2 16.1 107 ----- ----- Basin Index (%) 117 103 BELLE FOURCHE Blind Park 6890 .0 .0 * 15.6 14.6 107 Cole Canyon 5910 .0 .0 * 15.3 14.0 109 North Rapid Creek 6130 1.3 .0 * 9.3 12.6 74 ----- ----- Basin Index (%) * 98 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 15.6 14.6 107 North Rapid Creek 6130 1.3 .0 * 9.3 12.6 74 ----- ----- Basin Index (%) * 92 UPPER N. PLATTE Arapaho Ridge 10976 14.2 19.8 72 24.9 28.2 88 Blackhall Mtn 9839 21.8 27.9 78 34.7 39.0 89 Cinnabar Park 9707 7.5 14.2 53 24.1 27.9 86 Columbine 9167 2.5 4.8 52 29.5 30.8 96 Divide Peak 8730 1.4 7.5 19 23.9 25.7 93 Joe Wright 10158 19.3 20.4 95 35.8 32.8 109 Laprele Creek 8390 .0 .0 * 14.7 16.4 90 Med Bow 10512 33.2 -M * 36.0 -M * Never Summer 10323 20.4 20.4 100 21.9 21.9 100 North French Creek 10153 23.4 31.3 75 31.5 35.4 89 Old Battle 9860 28.1 34.7 81 36.1 41.6 87 Rawah 9069 .4 .1 400* 19.9 20.2 99 Sage Creek Basin 7850 -M .0 * 13.0 16.4 79 Sand Lake 10098 27.2 29.8 91 31.6 31.6 100 South Brush Creek 8495 .3 .0 * 15.7 19.0 83 Tower 10620 40.2 46.2 87 47.8 48.6 98 Webber Springs 9260 11.3 13.0 87 29.6 32.0 92 Whiskey Park 9020 -M 23.6 * 33.9 35.3 96 Willow Creek Pass 9523 8.3 11.3 73 18.1 17.3 105 Zirkel 9338 5.7 11.6 49 36.3 35.6 102 ----- ----- Basin Index (%) 79 94 SWEETWATER Deer Park 9700 12.0 12.2 98 21.4 23.4 91 Larsen Creek 9000 -M .0 * 15.6 16.5 95 South Pass 9040 7.4 9.8 76 18.3 19.6 93 ----- ----- Basin Index (%) 88 93 LOWER N. PLATTE Casper Mtn. 7920 3.9 4.0 98 19.6 18.6 105 Laprele Creek 8390 .0 .0 * 14.7 16.4 90 Reno Hill 8430 8.9 8.0 111 22.4 21.6 104 Windy Peak 7915 .1 .0 * 13.3 14.4 92 ----- ----- Basin Index (%) 108 99 LARAMIE RIVER Brooklyn Lake 10250 11.8 18.4 64 27.0 27.4 99 Cinnabar Park 9707 7.5 14.2 53 24.1 27.9 86 Crow Creek 8335 .0 .0 * 11.9 14.0 85 Deadman Hill 10239 12.8 16.8 76 23.6 23.7 100 Rawah 9069 .4 .1 400* 19.9 20.2 99 Roach 9740 7.1 11.2 63 24.3 24.0 101 Windy Peak 7915 .1 .0 * 13.3 14.4 92 ----- ----- Basin Index (%) 65 95 S. PLATTE Crow Creek 8335 .0 .0 * 11.9 14.0 85 ----- ----- Basin Index (%) * 85 LITTLE SNAKE RIVER Battle Mountain 7498 .0 .0 * 18.2 18.6 98 Divide Peak 8730 1.4 7.5 19 23.9 25.7 93 Elk River 8739 .0 .6 0* 25.4 23.6 108 Elkhead Divide 8800 3.8 -M * 24.9 -M * Little Snake River 8928 10.1 14.5 70 35.7 39.4 91 Old Battle 9860 28.1 34.7 81 36.1 41.6 87 Sage Creek Basin 7850 -M .0 * 13.0 16.4 79 Sandstone RS 8152 -M .0 * -M 21.5 * Whiskey Park 9020 -M 23.6 * 33.9 35.3 96 ----- ----- Basin Index (%) 69* 93 UPPER GREEN RIVER Big Sandy Opening 9080 6.9 6.8 101 15.7 16.0 98 Blind Bull Sum 8650 23.3 22.6 103 17.2 20.7 83 East Rim Divide 7930 .0 .0 * 12.5 13.8 91 Elkhart Park G.S. 9400 4.4 7.5 59 12.2 16.0 76 Gros Ventre Summit 8750 5.4 7.4 73 13.3 15.2 88 Gunsight Pass 9820 12.6 11.0 115 17.1 17.4 98 Indian Creek 9425 17.9 20.5 87 22.7 23.6 96 Kendall R.S. 7740 .0 .0 * 15.9 16.0 99 Larsen Creek 9000 -M .0 * 15.6 16.5 95 Loomis Park 8240 3.2 4.6 70 18.1 20.4 89 New Fork Lake 8340 .1 .0 * 11.5 13.7 84 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 .0 .0 * 17.9 16.1 111 Spring Creek Divide 9000 20.9 21.7 96 26.6 27.5 97 Triple Peak 8500 15.9 12.6 126 30.2 30.2 100 ----- ----- Basin Index (%) 96 94 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 .0 * 15.2 15.1 101 Buck Pasture 9632 .3 -M * 20.3 -M * EF Blacks Fork GS 9360 .0 .0 * 15.8 14.9 106 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 13.2 95 Hole-in-Rock 9168 .0 .0 * 12.7 13.4 95 Indian Creek 9425 17.9 20.5 87 22.7 23.6 96 Kelley R.S. 8180 4.4 3.2 138 19.1 19.8 96 Spirit Lk 10235 .0 5.0 0 18.4 20.2 91 Steel Creek Park 10158 10.2 15.4 66 20.6 20.9 99 ----- ----- Basin Index (%) 74* 98 UPPER BEAR RIVER Bear River RS 8777 .0 .0 * 16.4 14.4 114 Bug Lake 7987 2.8 8.4 33 21.4 20.2 106 Burts Miller Ranch 8000 .0 .0 * 9.9 9.3 106 Chalk Creek #1 9171 10.7 15.7 68 27.4 28.4 96 Giveout 6930 .3 .0 * 14.5 15.3 95 Hayden Fork 9130 .0 .3 0* 25.1 24.8 101 Kelley R.S. 8180 4.4 3.2 138 19.1 19.8 96 Lily Lake 9133 .0 .0 * 18.7 20.2 93 Monte Cristo 8932 11.9 17.6 68 29.1 29.8 98 Salt River Summit 7640 2.8 .0 * 18.6 18.9 98 Spring Creek Divide 9000 20.9 21.7 96 26.6 27.5 97 Trial Lake 9992 6.3 18.2 35 25.7 27.0 95 ----- ----- Basin Index (%) 71 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.