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: APRIL 22 , 2024 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 12.3 13.4 92 21.5 21.6 100 Blind Bull Sum 8650 24.6 25.4 97 17.0 18.8 90 Cottonwood Creek 7670 16.6 20.2 82 26.6 26.8 99 East Rim Divide 7930 2.1 9.4 22 11.5 11.8 97 Grand Targhee 9260 40.9 46.7 88 31.8 34.8 91 Granite Creek 6770 11.3 12.0 94 16.7 19.6 85 Grassy Lake 7265 26.7 31.8 84 36.2 37.4 97 Gros Ventre Summit 8750 11.2 13.2 85 14.0 13.6 103 Gunsight Pass 9820 12.5 13.2 95 15.5 15.0 103 Lewis Lake Divide 7850 30.0 32.8 91 36.9 35.2 105 Loomis Park 8240 8.5 13.0 65 15.6 17.4 90 Phillips Bench 8200 23.7 26.7 89 28.8 27.6 104 Salt River Summit 7640 11.5 11.0 105 15.3 17.1 89 Snake River Station 6920 11.5 14.6 79 23.9 23.4 102 Somsen Ranch 6800 11.1 6.4 173 22.0 17.4 126 Spring Creek Divide 9000 24.2 25.6 95 22.8 24.6 93 Thumb Divide 7980 15.9 17.0 94 19.1 19.6 97 Togwotee Pass 9580 20.0 24.9 80 20.9 26.1 80 Triple Peak 8500 19.2 20.8 92 25.3 27.0 94 Two Ocean Plateau 9240 29.6 32.4 91 27.8 28.6 97 Willow Creek 8080 30.8 28.4 108 35.8 35.2 102 Younts Peak 8350 12.7 15.2 84 16.0 16.4 98 ----- ----- Basin Index (%) 90 97 MADISON HEADWATERS IN WYOMING Black Bear 8170 33.6 39.5 85 39.3 39.2 100 Canyon 7870 10.4 -M * 14.4 -M * Madison Plateau 7750 20.3 23.6 86 24.2 25.9 93 West Yellowstone 6700 4.5 6.1 74 13.8 15.4 90 Whiskey Creek 6800 12.5 15.7 80 20.3 21.8 93 ----- ----- Basin Index (%) 84 95 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 16.7 23.8 70 16.5 22.0 75 Canyon 7870 10.4 -M * 14.4 -M * Evening Star 9200 20.6 27.0 76 27.8 30.5 91 Fisher Creek 9100 23.0 35.6 65 27.2 35.6 76 Monument Peak 8850 14.8 22.2 67 19.2 23.8 81 Northeast Entrance 7350 1.9 6.2 31 11.2 14.0 80 Parker Peak 9400 21.5 24.0 90 23.4 21.3 110 Sylvan Lake 8420 14.7 20.8 71 24.2 25.0 97 Thumb Divide 7980 15.9 17.0 94 19.1 19.6 97 Two Ocean Plateau 9240 29.6 32.4 91 27.8 28.6 97 White Mill 8700 18.0 25.8 70 19.0 24.2 79 Wolverine 7650 4.2 7.2 58 13.9 13.2 105 ----- ----- Basin Index (%) 75 89 WIND RIVER Burroughs Creek 8750 7.8 -M * 12.1 -M * Castle Creek 8400 2.7 3.6 75 8.7 9.0 97 Cold Springs 9630 4.9 6.2 79 12.0 10.1 119 Deer Park 9700 17.1 15.9 108 21.5 20.3 106 Hobbs Park 10100 16.1 15.5 104 17.5 14.8 118 Kirwin 9550 13.3 11.6 115 16.7 13.6 123 Little Warm 9370 9.3 10.2 91 14.1 12.8 110 South Pass 9040 14.1 15.3 92 18.3 17.4 105 St. Lawrence Alt 8620 2.0 -M * 10.7 -M * Togwotee Pass 9580 20.0 24.9 80 20.9 26.1 80 Townsend Creek 8700 8.8 9.7 91 14.7 13.1 112 ----- ----- Basin Index (%) 94 105 BIGHORN BASIN Bald Mtn. 9380 14.8 19.7 75 14.4 17.2 84 Bear Trap Meadow 8200 5.0 3.6 139 10.5 10.2 103 Bone Springs Div 9350 14.6 17.6 83 13.6 17.2 79 Grave Springs 8550 7.4 8.2 90 11.0 11.0 100 Kirwin 9550 13.3 11.6 115 16.7 13.6 123 Marquette 8760 14.3 7.8 183 17.7 10.8 164 Middle Powder 7760 11.7 11.8 99 11.5 11.2 103 Owl Creek 8975 4.3 3.6 119 9.5 7.2 132 Powder River Pass 9480 5.9 10.6 56 12.7 14.5 88 Shell Creek 9580 14.3 16.5 87 14.9 15.2 98 Timber Creek 7950 6.6 4.9 135 13.3 9.1 146 ----- ----- Basin Index (%) 97 106 SHOSHONE RIVER Blackwater 9780 23.1 25.4 91 24.9 24.2 103 Evening Star 9200 20.6 27.0 76 27.8 30.5 91 Marquette 8760 14.3 7.8 183 17.7 10.8 164 Sylvan Lake 8420 14.7 20.8 71 24.2 25.0 97 Sylvan Road 7120 .0 9.1 0 15.9 17.6 90 Younts Peak 8350 12.7 15.2 84 16.0 16.4 98 ----- ----- Basin Index (%) 81 102 POWDER RIVER Bear Trap Meadow 8200 5.0 3.6 139 10.5 10.2 103 Cloud Peak Reservoir 9860 13.0 15.7 83 16.5 15.1 109 Grave Springs 8550 7.4 8.2 90 11.0 11.0 100 Hansen Sawmill 8360 4.5 5.2 87 11.1 9.9 112 Middle Powder 7760 11.7 11.8 99 11.5 11.2 103 Powder River Pass 9480 5.9 10.6 56 12.7 14.5 88 Soldier Park 8720 2.6 6.5 40 11.6 10.8 107 ----- ----- Basin Index (%) 81 103 TONGUE RIVER Big Goose 7990 7.0 8.6 81 13.0 11.4 114 Bone Springs Div 9350 14.6 17.6 83 13.6 17.2 79 Burgess Junction 7880 9.5 12.0 79 13.7 13.8 99 Dome Lake 8880 -M 11.8 * 13.7 14.8 93 Little Goose 8870 9.2 10.5 88 15.0 14.0 107 Sucker Creek 8880 10.6 12.8 83 16.9 15.8 107 Tie Creek 6870 .7 4.4 16 13.7 12.9 106 ----- ----- Basin Index (%) 78 100 BELLE FOURCHE Blind Park 6890 -M 3.9 * 7.7 12.5 62 Cole Canyon 5910 .1 2.2 5 8.2 10.2 80 North Rapid Creek 6130 1.0 3.9 26 9.9 10.3 96 ----- ----- Basin Index (%) 18 78 CHEYENNE RIVER BASIN Blind Park 6890 -M 3.9 * 7.7 12.5 62 North Rapid Creek 6130 1.0 3.9 26 9.9 10.3 96 ----- ----- Basin Index (%) 26 77 UPPER N. PLATTE Arapaho Ridge 10976 -M 23.9 * -M 24.0 * Blackhall Mtn 9839 33.4 32.9 102 36.7 31.8 115 Cinnabar Park 9707 19.4 19.7 98 24.4 24.7 99 Columbine 9167 21.0 21.0 100 27.8 27.0 103 Divide Peak 8730 17.7 18.7 95 25.0 23.3 107 Joe Wright 10158 21.4 22.2 96 27.3 28.6 95 Laprele Creek 8390 6.0 7.1 85 12.6 13.2 95 Med Bow 10512 41.8 -M * 36.0 -M * Never Summer 10323 22.1 22.0 100 17.4 18.8 93 North French Creek 10153 28.2 31.6 89 29.5 30.2 98 Old Battle 9860 33.7 33.8 100 35.3 36.0 98 Rawah 9069 11.0 9.8 112 18.5 17.4 106 Sage Creek Basin 7850 7.4 6.0 123 15.6 13.8 113 Sand Lake 10098 32.1 30.5 105 31.1 27.0 115 South Brush Creek 8495 9.0 8.8 102 13.7 15.0 91 Tower 10620 43.4 46.0 94 42.6 42.4 100 Webber Springs 9260 21.6 22.0 98 27.3 27.6 99 Whiskey Park 9020 29.9 26.7 112 31.4 30.0 105 Willow Creek Pass 9523 15.8 14.8 107 16.7 14.8 113 Zirkel 9338 21.3 25.5 84 30.7 33.2 92 ----- ----- Basin Index (%) 99 102 SWEETWATER Deer Park 9700 17.1 15.9 108 21.5 20.3 106 Larsen Creek 9000 4.6 7.6 61 15.1 15.1 100 South Pass 9040 14.1 15.3 92 18.3 17.4 105 ----- ----- Basin Index (%) 92 104 LOWER N. PLATTE Casper Mtn. 7920 10.7 13.8 78 16.1 15.6 103 Laprele Creek 8390 6.0 7.1 85 12.6 13.2 95 Reno Hill 8430 10.0 14.0 71 15.8 17.2 92 Windy Peak 7915 7.6 7.0 109 11.9 11.5 103 ----- ----- Basin Index (%) 82 98 LARAMIE RIVER Brooklyn Lake 10250 24.1 22.6 107 27.3 23.8 115 Cinnabar Park 9707 19.4 19.7 98 24.4 24.7 99 Crow Creek 8335 2.5 2.7 93 11.0 11.9 92 Deadman Hill 10239 21.1 18.2 116 20.0 19.6 102 Rawah 9069 11.0 9.8 112 18.5 17.4 106 Roach 9740 13.9 16.4 85 18.5 20.7 89 Windy Peak 7915 7.6 7.0 109 11.9 11.5 103 ----- ----- Basin Index (%) 103 102 S. PLATTE Crow Creek 8335 2.5 2.7 93 11.0 11.9 92 ----- ----- Basin Index (%) 93 92 LITTLE SNAKE RIVER Battle Mountain 7498 3.8 4.8 79 19.2 16.4 117 Divide Peak 8730 17.7 18.7 95 25.0 23.3 107 Elk River 8739 13.1 14.8 89 21.3 21.0 101 Elkhead Divide 8800 19.9 -M * 25.2 -M * Little Snake River 8928 26.3 23.5 112 35.2 34.4 102 Old Battle 9860 33.7 33.8 100 35.3 36.0 98 Sage Creek Basin 7850 7.4 6.0 123 15.6 13.8 113 Sandstone RS 8152 10.8 9.8 110 19.0 19.0 100 Whiskey Park 9020 29.9 26.7 112 31.4 30.0 105 ----- ----- Basin Index (%) 103 104 UPPER GREEN RIVER Big Sandy Opening 9080 11.9 13.0 92 15.3 14.0 109 Blind Bull Sum 8650 24.6 25.4 97 17.0 18.8 90 East Rim Divide 7930 2.1 9.4 22 11.5 11.8 97 Elkhart Park G.S. 9400 9.6 13.1 73 12.9 13.4 96 Gros Ventre Summit 8750 11.2 13.2 85 14.0 13.6 103 Gunsight Pass 9820 12.5 13.2 95 15.5 15.0 103 Indian Creek 9425 22.0 24.1 91 20.7 20.6 100 Kendall R.S. 7740 4.7 8.2 57 13.3 13.9 96 Larsen Creek 9000 4.6 7.6 61 15.1 15.1 100 Loomis Park 8240 8.5 13.0 65 15.6 17.4 90 New Fork Lake 8340 4.0 9.0 44 -M 11.2 * Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 6.1 10.3 59 13.1 14.5 90 Spring Creek Divide 9000 24.2 25.6 95 22.8 24.6 93 Triple Peak 8500 19.2 20.8 92 25.3 27.0 94 ----- ----- Basin Index (%) 80 97 LOWER GREEN RIVER Blacks Fork Jct 8869 7.0 6.6 106 14.4 13.4 107 Buck Pasture 9632 11.9 -M * 17.2 -M * EF Blacks Fork GS 9360 7.8 10.7 73 10.5 12.6 83 Hams Fork 7840 -M 6.9 * 11.9 11.5 103 Henrys Fork 10182 -M -M * 14.0 -M * Hewinta 9500 7.0 7.2 97 15.4 15.2 101 Hickerson Park 9122 5.5 5.0 110 14.3 11.4 125 Hole-in-Rock 9168 5.1 5.9 86 11.4 11.2 102 Indian Creek 9425 22.0 24.1 91 20.7 20.6 100 Kelley R.S. 8180 13.4 13.9 96 18.2 17.4 105 Spirit Lk 10235 13.2 13.1 101 19.7 19.3 102 Steel Creek Park 10158 15.5 16.2 96 18.6 17.4 107 ----- ----- Basin Index (%) 94 103 UPPER BEAR RIVER Bear River RS 8777 5.1 2.4 212 14.9 13.0 115 Bug Lake 7987 17.8 16.8 106 23.5 18.8 125 Burts Miller Ranch 8000 1.4 .0 * 12.4 8.7 143 Chalk Creek #1 9171 23.0 22.0 105 26.4 24.2 109 Giveout 6930 3.1 2.0 155 13.7 13.3 103 Hayden Fork 9130 10.8 10.9 99 23.8 21.9 109 Kelley R.S. 8180 13.4 13.9 96 18.2 17.4 105 Lily Lake 9133 11.4 11.0 104 16.4 16.2 101 Monte Cristo 8932 28.0 26.0 108 29.9 27.0 111 Salt River Summit 7640 11.5 11.0 105 15.3 17.1 89 Spring Creek Divide 9000 24.2 25.6 95 22.8 24.6 93 Trial Lake 9992 28.8 22.4 129 27.8 23.4 119 ----- ----- Basin Index (%) 109 109 ----------------------------------------------------------------------------- -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.