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 SATURDAY: APRIL 20 , 2024 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 13.5 14.6 92 21.5 21.4 100 Blind Bull Sum 8650 24.4 25.4 96 16.9 18.6 91 Cottonwood Creek 7670 18.0 20.6 87 26.7 26.7 100 East Rim Divide 7930 3.4 9.4 36 11.3 11.7 97 Grand Targhee 9260 41.0 46.6 88 31.8 34.6 92 Granite Creek 6770 12.2 12.5 98 16.7 19.6 85 Grassy Lake 7265 27.3 32.9 83 36.1 37.3 97 Gros Ventre Summit 8750 11.3 13.2 86 14.1 13.4 105 Gunsight Pass 9820 13.2 13.6 97 15.4 14.8 104 Lewis Lake Divide 7850 30.8 33.3 92 36.9 35.0 105 Loomis Park 8240 9.6 13.4 72 15.5 17.4 89 Phillips Bench 8200 24.2 26.6 91 28.7 27.5 104 Salt River Summit 7640 12.4 11.2 111 15.1 17.1 88 Snake River Station 6920 13.3 15.3 87 23.8 23.3 102 Somsen Ranch 6800 12.0 7.2 167 21.8 17.4 125 Spring Creek Divide 9000 24.3 25.3 96 22.8 24.5 93 Thumb Divide 7980 16.2 16.7 97 19.0 19.6 97 Togwotee Pass 9580 20.2 24.9 81 20.8 26.1 80 Triple Peak 8500 20.5 21.8 94 25.2 26.8 94 Two Ocean Plateau 9240 29.8 32.3 92 27.8 28.4 98 Willow Creek 8080 32.5 28.8 113 35.7 35.2 101 Younts Peak 8350 13.2 15.2 87 15.8 16.3 97 ----- ----- Basin Index (%) 92 97 MADISON HEADWATERS IN WYOMING Black Bear 8170 33.4 39.6 84 39.2 39.0 101 Canyon 7870 10.6 -M * 14.3 -M * Madison Plateau 7750 20.7 23.5 88 24.2 25.8 94 West Yellowstone 6700 5.8 6.9 84 13.9 15.4 90 Whiskey Creek 6800 12.7 15.8 80 20.2 21.5 94 ----- ----- Basin Index (%) 85 96 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 16.6 23.7 70 16.2 21.9 74 Canyon 7870 10.6 -M * 14.3 -M * Evening Star 9200 20.9 27.1 77 27.6 30.4 91 Fisher Creek 9100 23.1 35.4 65 26.8 35.4 76 Monument Peak 8850 15.0 22.1 68 19.1 23.6 81 Northeast Entrance 7350 3.5 7.3 48 11.0 13.9 79 Parker Peak 9400 21.5 23.3 92 23.1 21.2 109 Sylvan Lake 8420 15.0 20.9 72 24.1 24.8 97 Thumb Divide 7980 16.2 16.7 97 19.0 19.6 97 Two Ocean Plateau 9240 29.8 32.3 92 27.8 28.4 98 White Mill 8700 18.0 26.0 69 18.7 24.2 77 Wolverine 7650 5.1 8.0 64 13.8 13.1 105 ----- ----- Basin Index (%) 76 89 WIND RIVER Burroughs Creek 8750 8.4 -M * 12.1 -M * Castle Creek 8400 3.6 4.5 80 8.6 9.0 96 Cold Springs 9630 5.4 6.2 87 12.0 9.8 122 Deer Park 9700 17.5 16.0 109 21.3 20.3 105 Hobbs Park 10100 16.0 15.8 101 17.4 14.6 119 Kirwin 9550 13.1 12.0 109 16.7 13.6 123 Little Warm 9370 9.6 10.4 92 13.8 12.7 109 South Pass 9040 14.1 15.6 90 18.1 17.3 105 St. Lawrence Alt 8620 2.8 -M * 10.6 -M * Togwotee Pass 9580 20.2 24.9 81 20.8 26.1 80 Townsend Creek 8700 9.0 9.7 93 14.6 13.0 112 ----- ----- Basin Index (%) 94 105 BIGHORN BASIN Bald Mtn. 9380 14.7 19.8 74 14.1 17.0 83 Bear Trap Meadow 8200 5.2 4.0 130 10.2 10.2 100 Bone Springs Div 9350 14.2 17.6 81 13.3 17.0 78 Grave Springs 8550 7.4 8.4 88 10.8 11.0 98 Kirwin 9550 13.1 12.0 109 16.7 13.6 123 Marquette 8760 14.2 8.1 175 17.6 10.6 166 Middle Powder 7760 11.7 11.8 99 11.3 11.0 103 Owl Creek 8975 4.6 4.2 110 9.4 7.2 131 Powder River Pass 9480 6.1 11.0 55 12.6 14.3 88 Shell Creek 9580 14.2 16.8 85 14.8 15.0 99 Timber Creek 7950 7.0 5.4 130 13.2 9.0 147 ----- ----- Basin Index (%) 94 106 SHOSHONE RIVER Blackwater 9780 23.1 25.1 92 24.6 23.8 103 Evening Star 9200 20.9 27.1 77 27.6 30.4 91 Marquette 8760 14.2 8.1 175 17.6 10.6 166 Sylvan Lake 8420 15.0 20.9 72 24.1 24.8 97 Sylvan Road 7120 .3 9.8 3 16.1 17.6 91 Younts Peak 8350 13.2 15.2 87 15.8 16.3 97 ----- ----- Basin Index (%) 82 102 POWDER RIVER Bear Trap Meadow 8200 5.2 4.0 130 10.2 10.2 100 Cloud Peak Reservoir 9860 12.7 15.8 80 16.2 15.0 108 Grave Springs 8550 7.4 8.4 88 10.8 11.0 98 Hansen Sawmill 8360 4.4 5.2 85 10.8 9.8 110 Middle Powder 7760 11.7 11.8 99 11.3 11.0 103 Powder River Pass 9480 6.1 11.0 55 12.6 14.3 88 Soldier Park 8720 2.3 6.7 34 11.3 10.8 105 ----- ----- Basin Index (%) 79 101 TONGUE RIVER Big Goose 7990 6.9 8.8 78 13.0 11.0 118 Bone Springs Div 9350 14.2 17.6 81 13.3 17.0 78 Burgess Junction 7880 9.4 11.7 80 13.7 13.5 101 Dome Lake 8880 -M 11.6 * 13.5 14.6 92 Little Goose 8870 9.3 10.8 86 14.6 13.8 106 Sucker Creek 8880 10.6 13.0 82 16.6 15.6 106 Tie Creek 6870 .8 4.0 20 13.6 12.5 109 ----- ----- Basin Index (%) 78 100 BELLE FOURCHE Blind Park 6890 -M 4.4 * 7.5 12.4 60 Cole Canyon 5910 .0 2.6 0 8.0 10.1 79 North Rapid Creek 6130 .8 4.0 20 10.1 10.2 99 ----- ----- Basin Index (%) 12 78 CHEYENNE RIVER BASIN Blind Park 6890 -M 4.4 * 7.5 12.4 60 North Rapid Creek 6130 .8 4.0 20 10.1 10.2 99 ----- ----- Basin Index (%) 20 78 UPPER N. PLATTE Arapaho Ridge 10976 22.6 23.4 97 23.6 23.5 100 Blackhall Mtn 9839 33.6 32.9 102 36.7 31.8 115 Cinnabar Park 9707 19.9 20.0 100 24.4 24.6 99 Columbine 9167 22.6 21.2 107 27.7 27.0 103 Divide Peak 8730 18.3 19.4 94 24.9 23.3 107 Joe Wright 10158 21.3 21.7 98 27.1 28.3 96 Laprele Creek 8390 6.6 8.2 80 12.5 13.0 96 Med Bow 10512 42.0 -M * 36.0 -M * Never Summer 10323 22.0 21.9 100 17.2 18.4 93 North French Creek 10153 28.2 31.4 90 29.5 29.6 100 Old Battle 9860 34.1 33.2 103 35.2 35.9 98 Rawah 9069 11.3 10.4 109 18.4 17.1 108 Sage Creek Basin 7850 8.0 6.5 123 15.6 13.8 113 Sand Lake 10098 32.1 30.2 106 31.0 26.8 116 South Brush Creek 8495 9.4 8.9 106 13.6 14.7 93 Tower 10620 43.7 46.2 95 42.5 41.8 102 Webber Springs 9260 22.0 22.2 99 27.2 27.4 99 Whiskey Park 9020 30.3 26.2 116 31.4 29.7 106 Willow Creek Pass 9523 15.7 14.6 108 16.6 14.7 113 Zirkel 9338 22.7 25.3 90 30.6 33.2 92 ----- ----- Basin Index (%) 100 102 SWEETWATER Deer Park 9700 17.5 16.0 109 21.3 20.3 105 Larsen Creek 9000 5.5 8.6 64 14.9 15.1 99 South Pass 9040 14.1 15.6 90 18.1 17.3 105 ----- ----- Basin Index (%) 92 103 LOWER N. PLATTE Casper Mtn. 7920 10.8 14.4 75 16.0 15.5 103 Laprele Creek 8390 6.6 8.2 80 12.5 13.0 96 Reno Hill 8430 10.2 14.1 72 15.6 17.0 92 Windy Peak 7915 8.0 6.8 118 11.7 11.4 103 ----- ----- Basin Index (%) 82 98 LARAMIE RIVER Brooklyn Lake 10250 24.4 22.0 111 27.2 23.6 115 Cinnabar Park 9707 19.9 20.0 100 24.4 24.6 99 Crow Creek 8335 -M 2.9 * -M 11.8 * Deadman Hill 10239 21.1 17.6 120 19.9 19.6 102 Rawah 9069 11.3 10.4 109 18.4 17.1 108 Roach 9740 14.3 16.6 86 18.5 20.4 91 Windy Peak 7915 8.0 6.8 118 11.7 11.4 103 ----- ----- Basin Index (%) 106 103 S. PLATTE Crow Creek 8335 -M 2.9 * -M 11.8 * ----- ----- Basin Index (%) * * LITTLE SNAKE RIVER Battle Mountain 7498 5.1 5.8 88 19.3 16.2 119 Divide Peak 8730 18.3 19.4 94 24.9 23.3 107 Elk River 8739 14.1 15.2 93 21.2 20.7 102 Elkhead Divide 8800 20.8 -M * 25.2 -M * Little Snake River 8928 27.3 24.2 113 35.2 34.4 102 Old Battle 9860 34.1 33.2 103 35.2 35.9 98 Sage Creek Basin 7850 8.0 6.5 123 15.6 13.8 113 Sandstone RS 8152 12.1 9.8 123 19.0 18.8 101 Whiskey Park 9020 30.3 26.2 116 31.4 29.7 106 ----- ----- Basin Index (%) 106 105 UPPER GREEN RIVER Big Sandy Opening 9080 12.9 13.6 95 15.2 13.9 109 Blind Bull Sum 8650 24.4 25.4 96 16.9 18.6 91 East Rim Divide 7930 3.4 9.4 36 11.3 11.7 97 Elkhart Park G.S. 9400 10.1 12.8 79 12.8 13.1 98 Gros Ventre Summit 8750 11.3 13.2 86 14.1 13.4 105 Gunsight Pass 9820 13.2 13.6 97 15.4 14.8 104 Indian Creek 9425 22.7 24.7 92 20.6 20.3 101 Kendall R.S. 7740 5.5 9.2 60 13.3 13.7 97 Larsen Creek 9000 5.5 8.6 64 14.9 15.1 99 Loomis Park 8240 9.6 13.4 72 15.5 17.4 89 New Fork Lake 8340 4.8 9.4 51 -M 11.2 * Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 6.9 10.6 65 12.9 14.3 90 Spring Creek Divide 9000 24.3 25.3 96 22.8 24.5 93 Triple Peak 8500 20.5 21.8 94 25.2 26.8 94 ----- ----- Basin Index (%) 83 97 LOWER GREEN RIVER Blacks Fork Jct 8869 8.1 7.1 114 14.4 13.4 107 Buck Pasture 9632 13.0 -M * 17.2 -M * EF Blacks Fork GS 9360 8.5 11.0 77 10.6 12.6 84 Hams Fork 7840 -M 7.6 * 11.9 11.5 103 Henrys Fork 10182 -M -M * 14.2 -M * Hewinta 9500 8.0 8.2 98 15.3 14.9 103 Hickerson Park 9122 6.3 5.6 112 14.3 11.2 128 Hole-in-Rock 9168 6.0 5.9 102 11.3 10.8 105 Indian Creek 9425 22.7 24.7 92 20.6 20.3 101 Kelley R.S. 8180 14.2 14.2 100 18.2 17.2 106 Spirit Lk 10235 14.1 12.8 110 19.7 19.0 104 Steel Creek Park 10158 15.8 16.0 99 18.6 17.3 108 ----- ----- Basin Index (%) 98 105 UPPER BEAR RIVER Bear River RS 8777 6.5 3.6 181 14.9 12.8 116 Bug Lake 7987 19.2 17.4 110 23.6 18.8 126 Burts Miller Ranch 8000 3.1 .0 * 12.4 8.6 144 Chalk Creek #1 9171 23.8 22.8 104 26.3 24.1 109 Giveout 6930 4.6 2.9 159 13.4 13.2 102 Hayden Fork 9130 12.4 11.7 106 23.8 21.9 109 Kelley R.S. 8180 14.2 14.2 100 18.2 17.2 106 Lily Lake 9133 12.5 11.4 110 16.4 16.0 102 Monte Cristo 8932 29.0 26.3 110 30.0 27.0 111 Salt River Summit 7640 12.4 11.2 111 15.1 17.1 88 Spring Creek Divide 9000 24.3 25.3 96 22.8 24.5 93 Trial Lake 9992 29.3 22.8 129 27.8 23.3 119 ----- ----- Basin Index (%) 113 109 ----------------------------------------------------------------------------- -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.