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 FRIDAY: MAY 13 , 2022 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 6.1 3.4 179 20.5 23.8 86 Blind Bull Sum 8650 23.4 23.8 98 16.9 20.5 82 Cottonwood Creek 7670 14.5 12.8 113 29.2 29.9 98 East Rim Divide 7930 .1 .3 33* 12.5 13.6 92 Grand Targhee 9260 37.1 46.2 80 32.5 37.2 87 Granite Creek 6770 2.1 4.2 50 16.5 21.6 76 Grassy Lake 7265 21.3 20.2 105 35.7 40.0 89 Gros Ventre Summit 8750 7.6 9.6 79 13.3 15.2 88 Gunsight Pass 9820 13.7 11.9 115 17.0 17.4 98 Lewis Lake Divide 7850 21.7 27.8 78 35.8 39.0 92 Loomis Park 8240 5.6 6.8 82 18.0 20.2 89 Phillips Bench 8200 20.6 22.8 90 27.7 30.3 91 Salt River Summit 7640 6.1 2.8 218 18.5 18.8 98 Snake River Station 6920 1.4 .4 350* 21.0 26.0 81 Somsen Ranch 6800 .0 .0 * -M 19.3 * Spring Creek Divide 9000 22.5 23.2 97 26.4 27.3 97 Thumb Divide 7980 11.9 5.8 205 21.6 22.2 97 Togwotee Pass 9580 23.4 25.1 93 26.0 28.8 90 Triple Peak 8500 18.5 16.3 113 29.8 29.8 100 Two Ocean Plateau 9240 31.8 33.0 96 30.2 30.8 98 Willow Creek 8080 24.4 22.2 110 38.6 39.9 97 Younts Peak 8350 9.5 12.0 79 13.7 18.0 76 ----- ----- Basin Index (%) 98 91 MADISON HEADWATERS IN WYOMING Black Bear 8170 31.9 39.8 80 35.5 42.0 85 Canyon 7870 9.9 -M * 15.8 -M * Madison Plateau 7750 18.4 20.4 90 25.4 30.5 83 West Yellowstone 6700 .0 .0 * 15.9 16.4 97 Whiskey Creek 6800 10.9 9.0 121 20.9 24.0 87 ----- ----- Basin Index (%) 88 87 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 21.0 24.3 86 20.3 24.8 82 Canyon 7870 9.9 -M * 15.8 -M * Evening Star 9200 29.6 26.2 113 29.4 33.3 88 Fisher Creek 9100 33.8 36.4 93 37.2 39.6 94 Monument Peak 8850 21.3 20.6 103 26.6 26.8 99 Northeast Entrance 7350 .6 .0 * 14.5 15.2 95 Parker Peak 9400 24.5 22.6 108 25.0 23.6 106 Sylvan Lake 8420 15.3 16.3 94 26.2 27.5 95 Thumb Divide 7980 11.9 5.8 205 21.6 22.2 97 Two Ocean Plateau 9240 31.8 33.0 96 30.2 30.8 98 White Mill 8700 23.9 26.2 91 24.5 26.6 92 Wolverine 7650 1.5 .0 * 15.7 14.8 106 ----- ----- Basin Index (%) 102 95 WIND RIVER Burroughs Creek 8750 6.8 -M * 16.9 -M * Castle Creek 8400 .0 .0 * 10.3 10.8 95 Cold Springs 9630 6.5 1.8 361 16.1 13.2 122 Deer Park 9700 14.5 14.1 103 21.2 23.4 91 Hobbs Park 10100 19.3 16.5 117 21.3 18.4 116 Kirwin 9550 13.9 11.4 122 17.5 16.0 109 Little Warm 9370 11.1 7.0 159 17.2 15.0 115 South Pass 9040 11.1 13.0 85 18.1 19.5 93 St. Lawrence Alt 8620 .0 -M * 12.4 -M * Togwotee Pass 9580 23.4 25.1 93 26.0 28.8 90 Townsend Creek 8700 9.2 3.4 271 17.0 15.6 109 ----- ----- Basin Index (%) 118 102 BIGHORN BASIN Bald Mtn. 9380 19.0 21.0 90 18.2 20.2 90 Bear Trap Meadow 8200 .4 .0 * 13.0 12.4 105 Bone Springs Div 9350 18.2 17.3 105 16.7 19.2 87 Grave Springs 8550 7.9 6.2 127 14.3 13.0 110 Kirwin 9550 13.9 11.4 122 17.5 16.0 109 Marquette 8760 5.8 7.7 75 12.6 14.3 88 Middle Powder 7760 10.2 8.2 124 14.0 13.4 104 Owl Creek 8975 .6 .0 * 10.5 9.4 112 Powder River Pass 9480 7.7 8.8 88 12.4 16.8 74 Shell Creek 9580 16.4 16.4 100 17.8 17.4 102 Timber Creek 7950 .0 .6 0 11.7 12.0 98 ----- ----- Basin Index (%) 103 97 SHOSHONE RIVER Blackwater 9780 26.0 23.8 109 27.4 26.9 102 Evening Star 9200 29.6 26.2 113 29.4 33.3 88 Marquette 8760 5.8 7.7 75 12.6 14.3 88 Sylvan Lake 8420 15.3 16.3 94 26.2 27.5 95 Sylvan Road 7120 .4 .0 * 16.5 19.1 86 Younts Peak 8350 9.5 12.0 79 13.7 18.0 76 ----- ----- Basin Index (%) 101 90 POWDER RIVER Bear Trap Meadow 8200 .4 .0 * 13.0 12.4 105 Cloud Peak Reservoir 9860 15.8 15.6 101 19.3 19.2 101 Grave Springs 8550 7.9 6.2 127 14.3 13.0 110 Hansen Sawmill 8360 .2 .9 22 12.7 12.5 102 Middle Powder 7760 10.2 8.2 124 14.0 13.4 104 Powder River Pass 9480 7.7 8.8 88 12.4 16.8 74 Soldier Park 8720 1.0 .2 500* 13.3 12.0 111 ----- ----- Basin Index (%) 108 100 TONGUE RIVER Big Goose 7990 7.7 7.8 99 15.6 15.7 99 Bone Springs Div 9350 18.2 17.3 105 16.7 19.2 87 Burgess Junction 7880 12.8 10.0 128 17.8 16.4 109 Dome Lake 8880 13.0 10.1 129 18.2 18.8 97 Little Goose 8870 10.1 9.1 111 18.8 17.0 111 Sucker Creek 8880 13.5 11.4 118 21.6 19.2 112 Tie Creek 6870 .1 .0 * 16.8 15.9 106 ----- ----- Basin Index (%) 115 103 BELLE FOURCHE Blind Park 6890 .4 .0 * 15.4 14.4 107 Cole Canyon 5910 .0 .0 * 15.4 13.6 113 North Rapid Creek 6130 1.2 .0 * 9.2 12.4 74 ----- ----- Basin Index (%) * 99 CHEYENNE RIVER BASIN Blind Park 6890 .4 .0 * 15.4 14.4 107 North Rapid Creek 6130 1.2 .0 * 9.2 12.4 74 ----- ----- Basin Index (%) * 92 UPPER N. PLATTE Arapaho Ridge 10976 18.4 22.2 83 24.8 27.2 91 Blackhall Mtn 9839 26.9 31.9 84 34.7 38.7 90 Cinnabar Park 9707 11.1 15.6 71 24.1 27.8 87 Columbine 9167 8.7 9.6 91 29.3 30.4 96 Divide Peak 8730 6.5 12.0 54 23.8 25.6 93 Joe Wright 10158 22.6 22.2 102 35.8 32.4 110 Laprele Creek 8390 .0 .6 0* 14.7 16.1 91 Med Bow 10512 36.0 -M * 36.0 -M * Never Summer 10323 23.2 22.2 105 21.9 21.8 100 North French Creek 10153 26.6 32.0 83 31.5 35.1 90 Old Battle 9860 31.1 36.1 86 35.9 41.3 87 Rawah 9069 4.1 2.4 171 19.9 20.2 99 Sage Creek Basin 7850 -M .0 * 13.0 16.1 81 Sand Lake 10098 29.6 32.0 92 31.5 31.5 100 South Brush Creek 8495 .4 .7 57* 15.8 18.6 85 Tower 10620 43.4 48.1 90 47.7 48.2 99 Webber Springs 9260 15.8 16.4 96 29.5 31.8 93 Whiskey Park 9020 29.6 25.8 115 33.8 35.2 96 Willow Creek Pass 9523 12.0 13.6 88 18.1 16.8 108 Zirkel 9338 11.6 17.8 65 -M 35.6 * ----- ----- Basin Index (%) 89 94 SWEETWATER Deer Park 9700 14.5 14.1 103 21.2 23.4 91 Larsen Creek 9000 -M .0 * 15.6 16.5 95 South Pass 9040 11.1 13.0 85 18.1 19.5 93 ----- ----- Basin Index (%) 94 92 LOWER N. PLATTE Casper Mtn. 7920 7.6 7.9 96 19.6 18.4 107 Laprele Creek 8390 .0 .6 0* 14.7 16.1 91 Reno Hill 8430 11.1 9.2 121 22.4 21.2 106 Windy Peak 7915 .3 .0 * 13.2 14.3 92 ----- ----- Basin Index (%) 107 100 LARAMIE RIVER Brooklyn Lake 10250 16.0 20.5 78 27.0 27.2 99 Cinnabar Park 9707 11.1 15.6 71 24.1 27.8 87 Crow Creek 8335 .0 .0 * 11.9 13.9 86 Deadman Hill 10239 18.3 18.1 101 23.5 23.4 100 Rawah 9069 4.1 2.4 171 19.9 20.2 99 Roach 9740 11.2 14.2 79 24.2 23.1 105 Windy Peak 7915 .3 .0 * 13.2 14.3 92 ----- ----- Basin Index (%) 86 96 S. PLATTE Crow Creek 8335 .0 .0 * 11.9 13.9 86 ----- ----- Basin Index (%) * 86 LITTLE SNAKE RIVER Battle Mountain 7498 .0 .0 * 18.3 18.4 99 Divide Peak 8730 6.5 12.0 54 23.8 25.6 93 Elk River 8739 4.6 4.2 110 25.5 23.5 109 Elkhead Divide 8800 9.0 -M * 24.8 -M * Little Snake River 8928 15.3 19.3 79 35.7 39.2 91 Old Battle 9860 31.1 36.1 86 35.9 41.3 87 Sage Creek Basin 7850 -M .0 * 13.0 16.1 81 Sandstone RS 8152 .0 .0 * 18.1 21.0 86 Whiskey Park 9020 29.6 25.8 115 33.8 35.2 96 ----- ----- Basin Index (%) 89 93 UPPER GREEN RIVER Big Sandy Opening 9080 9.4 8.8 107 15.6 15.9 98 Blind Bull Sum 8650 23.4 23.8 98 16.9 20.5 82 East Rim Divide 7930 .1 .3 33* 12.5 13.6 92 Elkhart Park G.S. 9400 6.1 9.2 66 11.8 15.5 76 Gros Ventre Summit 8750 7.6 9.6 79 13.3 15.2 88 Gunsight Pass 9820 13.7 11.9 115 17.0 17.4 98 Indian Creek 9425 21.5 21.2 101 22.6 23.4 97 Kendall R.S. 7740 .0 .0 * 15.7 15.8 99 Larsen Creek 9000 -M .0 * 15.6 16.5 95 Loomis Park 8240 5.6 6.8 82 18.0 20.2 89 New Fork Lake 8340 .5 2.0 25 11.3 13.2 86 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 .0 2.8 0 17.8 16.0 111 Spring Creek Divide 9000 22.5 23.2 97 26.4 27.3 97 Triple Peak 8500 18.5 16.3 113 29.8 29.8 100 ----- ----- Basin Index (%) 95 94 LOWER GREEN RIVER Blacks Fork Jct 8869 .6 .0 * 15.2 15.1 101 Buck Pasture 9632 5.0 -M * 20.3 -M * EF Blacks Fork GS 9360 -M 1.7 * 14.9 14.4 103 Hams Fork 7840 .0 .0 * 13.3 13.8 96 Henrys Fork 10182 -M -M * 14.3 -M * Hewinta 9500 .0 .9 0* 17.6 17.0 104 Hickerson Park 9122 .0 .0 * 12.7 13.0 98 Hole-in-Rock 9168 .0 .0 * 12.7 13.2 96 Indian Creek 9425 21.5 21.2 101 22.6 23.4 97 Kelley R.S. 8180 7.2 7.2 100 19.1 19.4 98 Spirit Lk 10235 1.3 8.6 15 18.5 20.0 92 Steel Creek Park 10158 13.1 17.1 77 20.6 20.8 99 ----- ----- Basin Index (%) 79* 98 UPPER BEAR RIVER Bear River RS 8777 .0 .0 * 16.4 14.4 114 Bug Lake 7987 7.7 11.9 65 21.5 20.1 107 Burts Miller Ranch 8000 .0 .0 * 9.8 8.8 111 Chalk Creek #1 9171 16.2 18.9 86 27.2 27.8 98 Giveout 6930 .0 .0 * 14.1 15.0 94 Hayden Fork 9130 .1 2.9 3 25.2 24.3 104 Kelley R.S. 8180 7.2 7.2 100 19.1 19.4 98 Lily Lake 9133 1.0 4.0 25 18.8 19.9 94 Monte Cristo 8932 16.3 20.2 81 29.2 29.4 99 Salt River Summit 7640 6.1 2.8 218 18.5 18.8 98 Spring Creek Divide 9000 22.5 23.2 97 26.4 27.3 97 Trial Lake 9992 12.6 20.3 62 25.6 26.6 96 ----- ----- Basin Index (%) 81 100 ----------------------------------------------------------------------------- -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.