Supercell over Laramie
WRDS/SCO may be working remotely so there could be a slight delay returning phone calls. Please email wrds@uwyo.edu if you are in need of information and we will respond as soon as possible

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 SATURDAY: MAY 13 , 2023 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 7.5 3.4 221 22.9 23.8 96 Blind Bull Sum 8650 25.0 23.8 105 20.5 20.5 100 Cottonwood Creek 7670 18.1 12.8 141 32.2 29.9 108 East Rim Divide 7930 .0 .3 0* 13.4 13.6 99 Grand Targhee 9260 47.1 46.2 102 33.6 37.2 90 Granite Creek 6770 7.0 4.2 167 16.6 21.6 77 Grassy Lake 7265 28.2 20.2 140 43.2 40.0 108 Gros Ventre Summit 8750 7.5 9.6 78 11.9 15.2 78 Gunsight Pass 9820 10.8 11.9 91 15.5 17.4 89 Lewis Lake Divide 7850 31.5 27.8 113 43.5 39.0 112 Loomis Park 8240 9.0 6.8 132 18.3 20.2 91 Phillips Bench 8200 24.2 22.8 106 32.5 30.3 107 Salt River Summit 7640 10.0 2.8 357 22.8 18.8 121 Snake River Station 6920 4.6 .4 1150* 25.0 26.0 96 Somsen Ranch 6800 6.0 .0 * 23.8 19.3 123 Spring Creek Divide 9000 28.2 23.2 122 24.0 27.3 88 Thumb Divide 7980 11.2 5.8 193 21.4 22.2 96 Togwotee Pass 9580 21.4 25.1 85 24.3 28.8 84 Triple Peak 8500 17.7 16.3 109 28.7 29.8 96 Two Ocean Plateau 9240 32.0 33.0 97 31.1 30.8 101 Willow Creek 8080 27.5 22.2 124 41.2 39.9 103 Younts Peak 8350 4.3 12.0 36 15.4 18.0 86 ----- ----- Basin Index (%) 115 99 MADISON HEADWATERS IN WYOMING Black Bear 8170 46.8 39.8 118 47.3 42.0 113 Canyon 7870 9.2 -M * 19.8 -M * Madison Plateau 7750 27.2 20.4 133 32.9 30.5 108 West Yellowstone 6700 .0 .0 * 20.9 16.4 127 Whiskey Creek 6800 17.3 9.0 192 28.6 24.0 119 ----- ----- Basin Index (%) 132 115 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 20.6 24.3 85 20.9 24.8 84 Canyon 7870 9.2 -M * 19.8 -M * Evening Star 9200 23.2 26.2 89 32.1 33.3 96 Fisher Creek 9100 34.4 36.4 95 39.2 39.6 99 Monument Peak 8850 17.8 20.6 86 27.2 26.8 101 Northeast Entrance 7350 .0 .0 * 14.4 15.2 95 Parker Peak 9400 23.3 22.6 103 27.4 23.6 116 Sylvan Lake 8420 14.2 16.3 87 26.9 27.5 98 Thumb Divide 7980 11.2 5.8 193 21.4 22.2 96 Two Ocean Plateau 9240 32.0 33.0 97 31.1 30.8 101 White Mill 8700 24.3 26.2 93 26.3 26.6 99 Wolverine 7650 .2 .0 * 15.0 14.8 101 ----- ----- Basin Index (%) 95 99 WIND RIVER Burroughs Creek 8750 .4 -M * 12.0 -M * Castle Creek 8400 .0 .0 * 8.4 10.8 78 Cold Springs 9630 .2 1.8 11 12.4 13.2 94 Deer Park 9700 21.5 14.1 152 29.3 23.4 125 Hobbs Park 10100 16.9 16.5 102 20.8 18.4 113 Kirwin 9550 6.7 11.4 59 15.7 16.0 98 Little Warm 9370 4.4 7.0 63 15.1 15.0 101 South Pass 9040 16.1 13.0 124 23.9 19.5 123 St. Lawrence Alt 8620 .1 -M * 13.4 -M * Togwotee Pass 9580 21.4 25.1 85 24.3 28.8 84 Townsend Creek 8700 8.2 3.4 241 17.4 15.6 112 ----- ----- Basin Index (%) 103 104 BIGHORN BASIN Bald Mtn. 9380 17.6 21.0 84 18.4 20.2 91 Bear Trap Meadow 8200 .1 .0 * 12.5 12.4 101 Bone Springs Div 9350 14.0 17.3 81 15.3 19.2 80 Grave Springs 8550 2.6 6.2 42 15.0 13.0 115 Kirwin 9550 6.7 11.4 59 15.7 16.0 98 Marquette 8760 4.8 7.7 62 13.2 14.3 92 Middle Powder 7760 4.8 8.2 59 13.9 13.4 104 Owl Creek 8975 .0 .0 * 10.5 9.4 112 Powder River Pass 9480 2.7 8.8 31 16.4 16.8 98 Shell Creek 9580 13.5 16.4 82 17.0 17.4 98 Timber Creek 7950 .2 .6 33 9.7 12.0 81 ----- ----- Basin Index (%) 69 96 SHOSHONE RIVER Blackwater 9780 22.0 23.8 92 25.9 26.9 96 Evening Star 9200 23.2 26.2 89 32.1 33.3 96 Marquette 8760 4.8 7.7 62 13.2 14.3 92 Sylvan Lake 8420 14.2 16.3 87 26.9 27.5 98 Sylvan Road 7120 .0 .0 * 16.6 19.1 87 Younts Peak 8350 4.3 12.0 36 15.4 18.0 86 ----- ----- Basin Index (%) 80 94 POWDER RIVER Bear Trap Meadow 8200 .1 .0 * 12.5 12.4 101 Cloud Peak Reservoir 9860 14.1 15.6 90 18.6 19.2 97 Grave Springs 8550 2.6 6.2 42 15.0 13.0 115 Hansen Sawmill 8360 .0 .9 0 12.1 12.5 97 Middle Powder 7760 4.8 8.2 59 13.9 13.4 104 Powder River Pass 9480 2.7 8.8 31 16.4 16.8 98 Soldier Park 8720 1.1 .2 550* 11.6 12.0 97 ----- ----- Basin Index (%) 64 101 TONGUE RIVER Big Goose 7990 4.9 7.8 63 13.6 15.7 87 Bone Springs Div 9350 14.0 17.3 81 15.3 19.2 80 Burgess Junction 7880 9.3 10.0 93 17.0 16.4 104 Dome Lake 8880 6.3 10.1 62 14.8 18.8 79 Little Goose 8870 5.0 9.1 55 15.3 17.0 90 Sucker Creek 8880 8.1 11.4 71 19.7 19.2 103 Tie Creek 6870 .1 .0 * 15.8 15.9 99 ----- ----- Basin Index (%) 73 91 BELLE FOURCHE Blind Park 6890 .1 .0 * 14.2 14.4 99 Cole Canyon 5910 .0 .0 * 13.8 13.6 101 North Rapid Creek 6130 .1 .0 * 12.5 12.4 101 ----- ----- Basin Index (%) * 100 CHEYENNE RIVER BASIN Blind Park 6890 .1 .0 * 14.2 14.4 99 North Rapid Creek 6130 .1 .0 * 12.5 12.4 101 ----- ----- Basin Index (%) * 100 UPPER N. PLATTE Arapaho Ridge 10976 24.4 22.2 110 29.3 27.2 108 Blackhall Mtn 9839 32.5 31.9 102 42.7 38.7 110 Cinnabar Park 9707 -M 15.6 * 26.0 27.8 94 Columbine 9167 12.1 9.6 126 30.5 30.4 100 Divide Peak 8730 18.1 12.0 151 32.9 25.6 129 Joe Wright 10158 23.7 22.2 107 32.6 32.4 101 Laprele Creek 8390 1.4 .6 233* 16.4 16.1 102 Med Bow 10512 41.1 -M * 40.3 -M * Never Summer 10323 26.3 22.2 118 23.2 21.8 106 North French Creek 10153 26.4 32.0 82 34.3 35.1 98 Old Battle 9860 40.4 36.1 112 46.6 41.3 113 Rawah 9069 4.9 2.4 204 20.8 20.2 103 Sage Creek Basin 7850 6.0 .0 * 22.7 16.1 141 Sand Lake 10098 30.1 32.0 94 33.7 31.5 107 South Brush Creek 8495 .4 .7 57* 17.4 18.6 94 Tower 10620 55.5 48.1 115 56.2 48.2 117 Webber Springs 9260 23.6 16.4 144 36.0 31.8 113 Whiskey Park 9020 33.7 25.8 131 39.2 35.2 111 Willow Creek Pass 9523 16.3 13.6 120 21.1 16.8 126 Zirkel 9338 16.0 17.8 90 38.2 35.6 107 ----- ----- Basin Index (%) 113 109 SWEETWATER Deer Park 9700 21.5 14.1 152 29.3 23.4 125 Larsen Creek 9000 2.9 .0 * 17.4 16.5 105 South Pass 9040 16.1 13.0 124 23.9 19.5 123 ----- ----- Basin Index (%) 149 119 LOWER N. PLATTE Casper Mtn. 7920 3.0 7.9 38 20.2 18.4 110 Laprele Creek 8390 1.4 .6 233* 16.4 16.1 102 Reno Hill 8430 10.4 9.2 113 22.0 21.2 104 Windy Peak 7915 1.4 .0 * 14.9 14.3 104 ----- ----- Basin Index (%) 92 105 LARAMIE RIVER Brooklyn Lake 10250 17.0 20.5 83 29.5 27.2 108 Cinnabar Park 9707 -M 15.6 * 26.0 27.8 94 Crow Creek 8335 .1 .0 * 12.3 13.9 88 Deadman Hill 10239 18.8 18.1 104 24.0 23.4 103 Rawah 9069 4.9 2.4 204 20.8 20.2 103 Roach 9740 12.5 14.2 88 25.4 23.1 110 Windy Peak 7915 1.4 .0 * 14.9 14.3 104 ----- ----- Basin Index (%) 99 102 S. PLATTE Crow Creek 8335 .1 .0 * 12.3 13.9 88 ----- ----- Basin Index (%) * 88 LITTLE SNAKE RIVER Battle Mountain 7498 .0 .0 * 24.5 18.4 133 Divide Peak 8730 18.1 12.0 151 32.9 25.6 129 Elk River 8739 9.4 4.2 224 30.2 23.5 129 Elkhead Divide 8800 16.7 -M * 34.1 -M * Little Snake River 8928 27.6 19.3 143 46.7 39.2 119 Old Battle 9860 40.4 36.1 112 46.6 41.3 113 Sage Creek Basin 7850 6.0 .0 * 22.7 16.1 141 Sandstone RS 8152 7.2 .0 * 27.3 21.0 130 Whiskey Park 9020 33.7 25.8 131 39.2 35.2 111 ----- ----- Basin Index (%) 146 123 UPPER GREEN RIVER Big Sandy Opening 9080 11.6 8.8 132 18.5 15.9 116 Blind Bull Sum 8650 25.0 23.8 105 20.5 20.5 100 East Rim Divide 7930 .0 .3 0* 13.4 13.6 99 Elkhart Park G.S. 9400 8.6 9.2 93 14.0 15.5 90 Gros Ventre Summit 8750 7.5 9.6 78 11.9 15.2 78 Gunsight Pass 9820 10.8 11.9 91 15.5 17.4 89 Indian Creek 9425 24.4 21.2 115 27.2 23.4 116 Kendall R.S. 7740 .9 .0 * 14.6 15.8 92 Larsen Creek 9000 2.9 .0 * 17.4 16.5 105 Loomis Park 8240 9.0 6.8 132 18.3 20.2 91 New Fork Lake 8340 2.3 2.0 115 -M 13.2 * Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 4.9 2.8 175 18.1 16.0 113 Spring Creek Divide 9000 28.2 23.2 122 24.0 27.3 88 Triple Peak 8500 17.7 16.3 109 28.7 29.8 96 ----- ----- Basin Index (%) 113 98 LOWER GREEN RIVER Blacks Fork Jct 8869 4.5 .0 * 16.6 15.1 110 Buck Pasture 9632 13.4 -M * 24.4 -M * EF Blacks Fork GS 9360 4.2 1.7 247 14.2 14.4 99 Hams Fork 7840 3.0 .0 * 17.4 13.8 126 Henrys Fork 10182 -M -M * 17.5 -M * Hewinta 9500 4.1 .9 456* 18.7 17.0 110 Hickerson Park 9122 .2 .0 * 14.2 13.0 109 Hole-in-Rock 9168 .2 .0 * 13.8 13.2 105 Indian Creek 9425 24.4 21.2 115 27.2 23.4 116 Kelley R.S. 8180 13.2 7.2 183 24.9 19.4 128 Spirit Lk 10235 16.8 8.6 195 24.2 20.0 121 Steel Creek Park 10158 18.0 17.1 105 23.0 20.8 111 ----- ----- Basin Index (%) 156 114 UPPER BEAR RIVER Bear River RS 8777 .0 .0 * 17.8 14.4 124 Bug Lake 7987 21.7 11.9 182 27.9 20.1 139 Burts Miller Ranch 8000 .3 .0 * 15.9 8.8 181 Chalk Creek #1 9171 -M 18.9 * -M 27.8 * Giveout 6930 3.6 .0 * 17.7 15.0 118 Hayden Fork 9130 10.2 2.9 352 30.7 24.3 126 Kelley R.S. 8180 13.2 7.2 183 24.9 19.4 128 Lily Lake 9133 6.0 4.0 150 19.4 19.9 97 Monte Cristo 8932 38.6 20.2 191 42.4 29.4 144 Salt River Summit 7640 10.0 2.8 357 22.8 18.8 121 Spring Creek Divide 9000 28.2 23.2 122 24.0 27.3 88 Trial Lake 9992 31.0 20.3 153 37.6 26.6 141 ----- ----- Basin Index (%) 176 125 ----------------------------------------------------------------------------- -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.