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 15 , 2024 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 13.2 14.8 89 20.8 20.9 100 Blind Bull Sum 8650 24.2 24.8 98 16.8 17.8 94 Cottonwood Creek 7670 19.3 20.4 95 26.4 26.2 101 East Rim Divide 7930 5.8 9.7 60 11.3 11.5 98 Grand Targhee 9260 40.4 45.9 88 31.5 33.8 93 Granite Creek 6770 13.8 13.2 105 16.7 19.1 87 Grassy Lake 7265 27.4 32.4 85 35.2 36.3 97 Gros Ventre Summit 8750 11.6 12.9 90 13.8 12.8 108 Gunsight Pass 9820 13.1 13.0 101 15.2 14.4 106 Lewis Lake Divide 7850 30.1 32.2 93 35.8 33.9 106 Loomis Park 8240 10.5 14.6 72 15.4 17.2 90 Phillips Bench 8200 24.2 26.2 92 28.4 27.2 104 Salt River Summit 7640 13.8 11.8 117 15.4 16.4 94 Snake River Station 6920 13.1 15.0 87 23.2 23.2 100 Somsen Ranch 6800 14.2 9.2 154 21.9 17.3 127 Spring Creek Divide 9000 24.6 25.2 98 22.5 24.4 92 Thumb Divide 7980 16.1 16.0 101 18.6 18.6 100 Togwotee Pass 9580 19.9 24.0 83 20.4 25.2 81 Triple Peak 8500 22.0 22.1 100 23.9 25.7 93 Two Ocean Plateau 9240 28.3 31.2 91 26.8 27.5 97 Willow Creek 8080 33.3 28.1 119 35.4 34.4 103 Younts Peak 8350 13.8 14.6 95 15.6 15.6 100 ----- ----- Basin Index (%) 95 98 MADISON HEADWATERS IN WYOMING Black Bear 8170 32.7 39.0 84 38.5 37.9 102 Canyon 7870 10.6 -M * 14.0 -M * Madison Plateau 7750 20.3 23.0 88 23.9 25.3 94 West Yellowstone 6700 6.2 7.7 81 13.7 14.3 96 Whiskey Creek 6800 13.2 15.1 87 20.2 20.8 97 ----- ----- Basin Index (%) 85 98 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 15.8 22.9 69 15.3 20.9 73 Canyon 7870 10.6 -M * 14.0 -M * Evening Star 9200 19.8 25.9 76 26.9 29.0 93 Fisher Creek 9100 22.8 34.8 66 26.3 34.5 76 Monument Peak 8850 13.9 21.6 64 18.4 22.9 80 Northeast Entrance 7350 3.3 8.0 41 10.6 13.4 79 Parker Peak 9400 20.6 22.4 92 22.6 20.8 109 Sylvan Lake 8420 14.8 19.8 75 23.5 24.2 97 Thumb Divide 7980 16.1 16.0 101 18.6 18.6 100 Two Ocean Plateau 9240 28.3 31.2 91 26.8 27.5 97 White Mill 8700 17.3 25.1 69 18.4 23.4 79 Wolverine 7650 6.5 8.4 77 13.4 12.8 105 ----- ----- Basin Index (%) 76 89 WIND RIVER Burroughs Creek 8750 9.3 -M * 11.9 -M * Castle Creek 8400 3.9 5.6 70 8.2 9.0 91 Cold Springs 9630 5.9 6.7 88 11.6 9.8 118 Deer Park 9700 17.6 15.4 114 21.2 19.3 110 Hobbs Park 10100 15.8 15.5 102 17.0 14.3 119 Kirwin 9550 12.4 11.1 112 16.0 12.6 127 Little Warm 9370 9.8 10.2 96 13.6 12.2 111 South Pass 9040 14.5 15.8 92 18.0 16.5 109 St. Lawrence Alt 8620 4.0 -M * 10.4 -M * Togwotee Pass 9580 19.9 24.0 83 20.4 25.2 81 Townsend Creek 8700 9.1 9.6 95 14.3 12.8 112 ----- ----- Basin Index (%) 96 107 BIGHORN BASIN Bald Mtn. 9380 14.0 19.6 71 13.6 16.6 82 Bear Trap Meadow 8200 5.3 5.2 102 9.8 9.6 102 Bone Springs Div 9350 13.4 18.2 74 12.7 16.5 77 Grave Springs 8550 7.4 8.6 86 10.4 10.7 97 Kirwin 9550 12.4 11.1 112 16.0 12.6 127 Marquette 8760 11.7 7.8 150 15.4 10.0 154 Middle Powder 7760 11.2 11.8 95 10.8 10.2 106 Owl Creek 8975 3.2 5.2 62 7.8 6.7 116 Powder River Pass 9480 6.0 10.4 58 11.9 13.6 88 Shell Creek 9580 13.1 16.0 82 13.8 14.4 96 Timber Creek 7950 6.6 5.1 129 12.4 8.6 144 ----- ----- Basin Index (%) 88 104 SHOSHONE RIVER Blackwater 9780 22.4 24.4 92 24.0 23.4 103 Evening Star 9200 19.8 25.9 76 26.9 29.0 93 Marquette 8760 11.7 7.8 150 15.4 10.0 154 Sylvan Lake 8420 14.8 19.8 75 23.5 24.2 97 Sylvan Road 7120 1.9 10.3 18 15.3 16.8 91 Younts Peak 8350 13.8 14.6 95 15.6 15.6 100 ----- ----- Basin Index (%) 82 101 POWDER RIVER Bear Trap Meadow 8200 5.3 5.2 102 9.8 9.6 102 Cloud Peak Reservoir 9860 11.3 15.3 74 14.7 14.5 101 Grave Springs 8550 7.4 8.6 86 10.4 10.7 97 Hansen Sawmill 8360 4.2 6.2 68 9.5 9.2 103 Middle Powder 7760 11.2 11.8 95 10.8 10.2 106 Powder River Pass 9480 6.0 10.4 58 11.9 13.6 88 Soldier Park 8720 2.4 6.4 38 10.0 10.4 96 ----- ----- Basin Index (%) 75 99 TONGUE RIVER Big Goose 7990 6.2 9.0 69 11.2 10.8 104 Bone Springs Div 9350 13.4 18.2 74 12.7 16.5 77 Burgess Junction 7880 8.7 11.5 76 12.5 13.0 96 Dome Lake 8880 -M 12.1 * 11.9 13.8 86 Little Goose 8870 7.9 10.6 75 13.0 13.0 100 Sucker Creek 8880 9.9 13.0 76 15.3 14.9 103 Tie Creek 6870 -M 4.4 * 12.8 11.8 108 ----- ----- Basin Index (%) 74 95 BELLE FOURCHE Blind Park 6890 .0 4.8 0 7.0 11.9 59 Cole Canyon 5910 .1 3.4 3 7.5 9.6 78 North Rapid Creek 6130 2.8 5.4 52 8.7 9.6 91 ----- ----- Basin Index (%) 21 75 CHEYENNE RIVER BASIN Blind Park 6890 .0 4.8 0 7.0 11.9 59 North Rapid Creek 6130 2.8 5.4 52 8.7 9.6 91 ----- ----- Basin Index (%) 27 73 UPPER N. PLATTE Arapaho Ridge 10976 22.1 23.0 96 22.0 22.6 97 Blackhall Mtn 9839 31.1 31.2 100 35.3 30.6 115 Cinnabar Park 9707 19.6 20.8 94 23.4 24.5 96 Columbine 9167 23.9 20.9 114 26.5 26.0 102 Divide Peak 8730 20.0 19.8 101 24.7 22.0 112 Joe Wright 10158 18.6 21.8 85 23.9 26.6 90 Laprele Creek 8390 6.7 8.6 78 11.7 12.4 94 Med Bow 10512 40.1 -M * 34.0 -M * Never Summer 10323 19.1 20.8 92 14.9 18.0 83 North French Creek 10153 26.7 31.6 84 27.6 28.2 98 Old Battle 9860 33.6 32.6 103 34.5 35.4 97 Rawah 9069 9.8 10.2 96 16.4 16.4 100 Sage Creek Basin 7850 11.3 10.0 113 15.5 13.5 115 Sand Lake 10098 30.4 29.8 102 29.2 26.5 110 South Brush Creek 8495 8.6 10.1 85 12.5 14.2 88 Tower 10620 41.9 44.4 94 40.7 41.0 99 Webber Springs 9260 22.6 21.4 106 26.8 26.1 103 Whiskey Park 9020 31.1 26.6 117 30.7 28.4 108 Willow Creek Pass 9523 14.2 14.3 99 15.0 14.4 104 Zirkel 9338 23.7 25.4 93 29.4 31.6 93 ----- ----- Basin Index (%) 98 101 SWEETWATER Deer Park 9700 17.6 15.4 114 21.2 19.3 110 Larsen Creek 9000 7.3 8.6 85 14.9 14.3 104 South Pass 9040 14.5 15.8 92 18.0 16.5 109 ----- ----- Basin Index (%) 99 108 LOWER N. PLATTE Casper Mtn. 7920 11.1 14.0 79 15.8 14.8 107 Laprele Creek 8390 6.7 8.6 78 11.7 12.4 94 Reno Hill 8430 10.2 14.3 71 15.2 16.6 92 Windy Peak 7915 8.1 7.4 109 10.7 11.0 97 ----- ----- Basin Index (%) 81 97 LARAMIE RIVER Brooklyn Lake 10250 23.7 22.0 108 25.8 23.0 112 Cinnabar Park 9707 19.6 20.8 94 23.4 24.5 96 Crow Creek 8335 3.6 4.3 84 10.5 11.1 95 Deadman Hill 10239 20.8 16.6 125 18.5 18.7 99 Rawah 9069 9.8 10.2 96 16.4 16.4 100 Roach 9740 13.6 15.8 86 17.7 20.0 88 Windy Peak 7915 8.1 7.4 109 10.7 11.0 97 ----- ----- Basin Index (%) 102 99 S. PLATTE Crow Creek 8335 3.6 4.3 84 10.5 11.1 95 ----- ----- Basin Index (%) 84 95 LITTLE SNAKE RIVER Battle Mountain 7498 7.6 7.5 101 18.8 16.0 118 Divide Peak 8730 20.0 19.8 101 24.7 22.0 112 Elk River 8739 16.7 16.4 102 20.7 20.0 104 Elkhead Divide 8800 21.7 -M * 24.6 -M * Little Snake River 8928 28.1 25.6 110 34.5 33.1 104 Old Battle 9860 33.6 32.6 103 34.5 35.4 97 Sage Creek Basin 7850 11.3 10.0 113 15.5 13.5 115 Sandstone RS 8152 14.6 11.9 123 18.4 18.4 100 Whiskey Park 9020 31.1 26.6 117 30.7 28.4 108 ----- ----- Basin Index (%) 108 106 UPPER GREEN RIVER Big Sandy Opening 9080 13.1 13.8 95 15.2 13.8 110 Blind Bull Sum 8650 24.2 24.8 98 16.8 17.8 94 East Rim Divide 7930 5.8 9.7 60 11.3 11.5 98 Elkhart Park G.S. 9400 10.6 12.9 82 12.8 13.0 98 Gros Ventre Summit 8750 11.6 12.9 90 13.8 12.8 108 Gunsight Pass 9820 13.1 13.0 101 15.2 14.4 106 Indian Creek 9425 22.2 24.3 91 20.5 20.0 102 Kendall R.S. 7740 7.0 10.0 70 13.2 13.3 99 Larsen Creek 9000 7.3 8.6 85 14.9 14.3 104 Loomis Park 8240 10.5 14.6 72 15.4 17.2 90 New Fork Lake 8340 6.5 9.8 66 -M 10.8 * Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 8.3 11.8 70 12.9 14.0 92 Spring Creek Divide 9000 24.6 25.2 98 22.5 24.4 92 Triple Peak 8500 22.0 22.1 100 23.9 25.7 93 ----- ----- Basin Index (%) 87 98 LOWER GREEN RIVER Blacks Fork Jct 8869 9.4 7.5 125 14.2 12.4 115 Buck Pasture 9632 14.2 -M * 16.5 -M * EF Blacks Fork GS 9360 9.6 11.8 81 10.3 11.7 88 Hams Fork 7840 -M 9.0 * 11.6 11.2 104 Henrys Fork 10182 -M -M * 13.8 -M * Hewinta 9500 10.2 9.6 106 15.2 13.9 109 Hickerson Park 9122 7.7 6.6 117 13.7 11.0 125 Hole-in-Rock 9168 7.2 6.4 112 11.1 10.5 106 Indian Creek 9425 22.2 24.3 91 20.5 20.0 102 Kelley R.S. 8180 15.1 14.6 103 18.0 16.6 108 Spirit Lk 10235 14.7 13.7 107 19.3 18.5 104 Steel Creek Park 10158 15.7 15.2 103 18.2 16.9 108 ----- ----- Basin Index (%) 102 107 UPPER BEAR RIVER Bear River RS 8777 8.2 6.9 119 14.7 12.4 119 Bug Lake 7987 20.5 18.4 111 23.5 18.5 127 Burts Miller Ranch 8000 5.4 2.5 216 12.4 8.2 151 Chalk Creek #1 9171 23.7 23.7 100 25.7 24.0 107 Giveout 6930 7.7 4.8 160 13.5 13.0 104 Hayden Fork 9130 14.0 14.1 99 23.5 21.5 109 Kelley R.S. 8180 15.1 14.6 103 18.0 16.6 108 Lily Lake 9133 12.3 12.7 97 16.3 16.0 102 Monte Cristo 8932 29.4 27.4 107 29.6 26.6 111 Salt River Summit 7640 13.8 11.8 117 15.4 16.4 94 Spring Creek Divide 9000 24.6 25.2 98 22.5 24.4 92 Trial Lake 9992 29.1 22.2 131 27.3 22.7 120 ----- ----- Basin Index (%) 111 110 ----------------------------------------------------------------------------- -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.