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 WEDNESDAY: APRIL 24 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 15.8 11.0 144 24.1 22.0 110 Black Bear 8170 42.5 36.9 115 48.6 40.5 120 Blind Bull Sum 8650 25.1 24.3 103 20.8 20.6 101 Cottonwood Creek 7670 21.3 17.5 122 29.0 26.3 110 East Rim Divide 7930 6.5 9.2 71 13.1 12.4 106 Grand Targhee 9260 47.4 42.9 110 36.9 33.2 111 Granite Creek 6770 15.5 9.8 158 22.8 20.5 111 Grassy Lake 7265 34.6 30.4 114 41.7 38.0 110 Gros Ventre Summit 8750 8.8 12.7 69 13.4 14.0 96 Gunsight Pass 9820 14.9 13.6 110 17.5 15.3 114 Lewis Lake Divide 7850 38.1 30.7 124 42.7 37.4 114 Phillips Bench 8200 30.9 25.3 122 35.1 29.6 119 Salt River Summit 7640 12.1 8.7 139 18.5 17.7 105 Snake River Station 6920 14.6 10.5 139 27.9 23.9 117 Spring Creek Divide 9000 24.8 23.6 105 25.9 25.3 102 Thumb Divide 7980 17.7 14.2 125 21.0 20.1 104 Togwotee Pass 9580 25.6 24.4 105 27.4 26.1 105 Two Ocean Plateau 9240 34.0 28.8 118 28.7 29.0 99 Willow Creek 8080 32.8 26.1 126 39.1 36.1 108 Younts Peak 8350 -M 15.1 * -M 16.9 * ----- ----- Basin Index (%) 116 109 MADISON-GALLATIN Black Bear 8170 42.5 36.9 115 48.6 40.5 120 Canyon 7870 13.5 11.8 114 18.1 17.3 105 Madison Plateau 7750 31.0 22.7 137 31.1 27.9 111 West Yellowstone 6700 5.8 5.6 104 18.8 15.4 122 Whiskey Creek 6800 17.9 15.4 116 23.8 21.6 110 ----- ----- Basin Index (%) 120 114 YELLOWSTONE Beartooth Lake 9360 23.7 23.6 100 22.1 21.1 105 Burnt Mtn 5880 3.4 .0 * 16.3 14.8 110 Canyon 7870 13.5 11.8 114 18.1 17.3 105 Cole Creek 7850 18.1 16.3 111 -M 15.1 * Evening Star 9200 28.0 24.4 115 32.2 29.3 110 Fisher Creek 9100 36.2 33.1 109 39.3 34.0 116 Northeast Entrance 7350 5.7 5.4 106 15.9 13.2 120 Parker Peak 9400 26.5 21.6 123 27.0 19.2 141 Sylvan Lake 8420 21.6 20.3 106 30.1 24.1 125 Thumb Divide 7980 17.7 14.2 125 21.0 20.1 104 Two Ocean Plateau 9240 34.0 28.8 118 28.7 29.0 99 White Mill 8700 27.1 23.8 114 23.2 25.3 92 Wolverine 7650 6.5 5.8 112 14.3 13.1 109 Younts Peak 8350 -M 15.1 * -M 16.9 * ----- ----- Basin Index (%) 114 111 WIND RIVER Burroughs Creek 8750 10.7 -M * 15.6 -M * Castle Creek 8400 .4 -M * 7.6 -M * Cold Springs 9630 6.1 3.4 179 9.4 11.5 82 Deer Park 9700 17.3 16.3 106 20.7 22.4 92 Hobbs Park 10100 17.2 15.5 111 15.0 15.5 97 Kirwin 9550 11.0 10.1 109 12.5 12.9 97 Little Warm 9370 9.9 9.7 102 10.5 14.3 73 Owl Creek 8975 2.6 3.0 87 8.1 7.2 112 South Pass 9040 15.2 15.3 99 14.2 19.2 74 St. Lawrence Alt 8620 -M 5.1 * -M 10.5 * Togwotee Pass 9580 25.6 24.4 105 27.4 26.1 105 Townsend Creek 8700 10.4 8.9 117 13.3 13.9 96 ----- ----- Basin Index (%) 108 92 BIGHORN BASIN Bald Mtn. 9380 16.9 20.2 84 13.6 18.6 73 Bear Trap Meadow 8200 1.2 2.2 55 7.6 9.8 78 Bone Springs Div 9350 13.7 16.4 84 12.9 17.2 75 Grave Springs 8550 7.8 9.3 84 10.1 12.1 83 Kirwin 9550 11.0 10.1 109 12.5 12.9 97 Marquette 8760 7.3 -M * 10.2 -M * Middle Powder 7760 6.7 12.3 54 9.5 13.2 72 Owl Creek 8975 2.6 3.0 87 8.1 7.2 112 Powder River Pass 9480 9.0 10.3 87 -M 14.1 * Shell Creek 9580 13.8 15.8 87 11.5 15.2 76 Timber Creek 7950 1.4 3.9 36 7.6 8.8 86 ----- ----- Basin Index (%) 81 81 SHOSHONE RIVER Blackwater 9780 26.9 24.3 111 27.5 22.3 123 Evening Star 9200 28.0 24.4 115 32.2 29.3 110 Marquette 8760 7.3 -M * 10.2 -M * Sylvan Lake 8420 21.6 20.3 106 30.1 24.1 125 Sylvan Road 7120 5.0 8.6 58 17.6 17.9 98 Younts Peak 8350 -M 15.1 * -M 16.9 * ----- ----- Basin Index (%) 105 115 POWDER RIVER Bear Trap Meadow 8200 1.2 2.2 55 7.6 9.8 78 Cloud Peak Reservoir 9860 12.3 16.2 76 11.9 15.4 77 Grave Springs 8550 7.8 9.3 84 10.1 12.1 83 Hansen Sawmill 8360 4.6 4.4 105 8.8 10.0 88 Middle Powder 7760 6.7 12.3 54 9.5 13.2 72 Powder River Pass 9480 9.0 10.3 87 -M 14.1 * Soldier Park 8720 1.6 -M * 7.8 -M * ----- ----- Basin Index (%) 76 79 TONGUE RIVER Big Goose 7990 7.4 9.1 81 10.9 13.2 83 Bone Springs Div 9350 13.7 16.4 84 12.9 17.2 75 Burgess Junction 7880 8.0 12.5 64 9.1 13.9 65 Dome Lake 8880 6.9 11.8 58 -M 15.3 * Little Goose 8870 8.7 -M * 8.7 -M * Sucker Creek 8880 10.0 12.7 79 -M 16.2 * Tie Creek 6870 1.6 3.8 42 11.6 13.4 87 ----- ----- Basin Index (%) 72 77 BELLE FOURCHE Blind Park 6890 -M 3.8 * 8.3 13.5 61 Cole Canyon 5910 .9 1.1 82 13.2 10.8 122 ----- ----- Basin Index (%) 82 88 CHEYENNE RIVER BASIN Blind Park 6890 -M 3.8 * 8.3 13.5 61 North Rapid Creek 6130 .1 3.8 3 -M 11.5 * ----- ----- Basin Index (%) 3 61 UPPER N. PLATTE Arapaho Ridge 10960 25.8 21.6 119 27.5 25.2 109 Blackhall Mtn 9820 33.2 -M * 35.4 -M * Columbine 9160 22.1 20.7 107 30.1 27.5 109 Divide Peak 8880 17.6 18.2 97 24.8 23.3 106 Joe Wright 10120 21.9 23.0 95 31.6 28.5 111 Laprele Creek 8375 9.5 7.3 130 15.5 14.2 109 Med Bow 10500 41.3 -M * 37.7 -M * Never Summer 10280 23.2 20.9 111 20.4 -M * North French Creek 10130 31.2 32.4 96 32.3 29.3 110 Old Battle 10000 38.2 33.8 113 38.5 37.7 102 Rawah 9020 8.6 8.0 108 18.3 16.4 112 Sage Creek Basin 7850 12.2 3.5 349 17.3 15.5 112 Sand Lake 10050 -M 30.9 * -M 27.6 * South Brush Creek 8440 4.8 9.9 48 13.1 16.9 78 Tower 10500 50.2 49.1 102 48.9 43.1 113 Webber Springs 9250 24.6 21.9 112 32.7 28.9 113 Whiskey Park 8950 28.8 25.6 112 34.0 30.3 112 Willow Creek Pass 9540 16.9 13.6 124 18.5 14.9 124 Zirkel 9340 29.7 22.5 132 39.6 30.2 131 ----- ----- Basin Index (%) 110 111 SWEETWATER Deer Park 9700 17.3 16.3 106 20.7 22.4 92 Larsen Creek 9000 7.3 9.9 74 15.7 -M * South Pass 9040 15.2 15.3 99 14.2 19.2 74 ----- ----- Basin Index (%) 96 84 LOWER N. PLATTE Casper Mtn. 7900 13.3 14.2 94 13.8 17.0 81 Laprele Creek 8375 9.5 7.3 130 15.5 14.2 109 Reno Hill 8400 15.9 13.9 114 19.1 17.8 107 Windy Peak 7900 7.2 6.2 116 12.6 12.2 103 ----- ----- Basin Index (%) 110 100 LARAMIE RIVER Brooklyn Lake 10240 25.2 22.7 111 28.2 23.5 120 Cinnabar Park 9574 20.3 19.9 102 25.4 26.0 98 Crow Creek 8330 .5 .0 * 11.9 12.6 94 Deadman Hill 10220 21.9 17.9 122 21.3 19.6 109 Rawah 9020 8.6 8.0 108 18.3 16.4 112 Roach 9700 16.0 16.7 96 23.0 21.3 108 Windy Peak 7900 7.2 6.2 116 12.6 12.2 103 ----- ----- Basin Index (%) 109 107 S. PLATTE Black Mountain 8920 11.2 -M * 15.2 -M * Crow Creek 8330 .5 .0 * 11.9 12.6 94 Deadman Hill 10220 21.9 17.9 122 21.3 19.6 109 ----- ----- Basin Index (%) 125* 103 LITTLE SNAKE RIVER Battle Mountain 7440 4.3 2.4 179 17.1 16.4 104 Divide Peak 8880 17.6 18.2 97 24.8 23.3 106 Elk River 8700 14.3 14.7 97 20.8 21.8 95 Little Snake River 8915 25.9 23.5 110 39.3 31.5 125 Old Battle 10000 38.2 33.8 113 38.5 37.7 102 Sage Creek Basin 7850 12.2 3.5 349 17.3 15.5 112 Sandstone RS 8150 9.2 9.2 100 19.2 20.0 96 Whiskey Park 8950 28.8 25.6 112 34.0 30.3 112 ----- ----- Basin Index (%) 115 107 UPPER GREEN RIVER Big Sandy Opening 9080 14.4 12.2 118 16.2 14.5 112 Blind Bull Sum 8650 25.1 24.3 103 20.8 20.6 101 East Rim Divide 7930 6.5 9.2 71 13.1 12.4 106 Elkhart Park G.S. 9400 14.1 11.8 119 15.6 14.3 109 Gros Ventre Summit 8750 8.8 12.7 69 13.4 14.0 96 Gunsight Pass 9820 14.9 13.6 110 17.5 15.3 114 Indian Creek 9425 23.8 23.6 101 20.1 24.1 83 Kendall R.S. 7740 7.1 7.0 101 12.6 14.9 85 Loomis Park 8240 13.9 12.1 115 18.6 18.2 102 New Fork Lake 8340 7.9 7.7 103 10.7 11.5 93 Pocket Creek 9360 15.3 -M * 16.7 -M * Snider Basin 8060 7.1 10.2 70 14.5 15.1 96 Spring Creek Divide 9000 24.8 23.6 105 25.9 25.3 102 Triple Peak 8500 22.9 19.1 120 28.2 26.8 105 ----- ----- Basin Index (%) 102 100 LOWER GREEN RIVER Blacks Fork Jct 8869 7.7 -M * 14.8 -M * Buck Pasture 9632 16.2 -M * 22.1 -M * EF Blacks Fork GS 9360 11.0 -M * 13.5 -M * Hams Fork 7840 5.6 5.3 106 13.1 12.4 106 Hewinta 9500 10.7 7.2 149 17.0 15.4 110 Hickerson Park 9122 8.0 5.1 157 13.5 11.5 117 Hole-in-Rock 9168 5.7 5.3 108 12.8 10.9 117 Indian Creek 9425 23.8 23.6 101 20.1 24.1 83 Kelley R.S. 8180 13.8 11.9 116 17.8 19.3 92 Spirit Lk 10235 16.4 -M * 19.1 -M * Steel Creek Park 10158 17.4 16.5 105 21.5 18.2 118 ----- ----- Basin Index (%) 113 104 UPPER BEAR RIVER Bear River RS 8777 7.6 -M * 17.0 -M * Bug Lake 7987 22.7 16.2 140 26.4 20.8 127 Burts Miller Ranch 8000 .9 -M * 10.0 -M * Chalk Creek #1 9171 27.2 24.6 111 32.6 27.3 119 Hayden Fork 9130 13.6 10.9 125 25.5 22.8 112 Kelley R.S. 8180 13.8 11.9 116 17.8 19.3 92 Lily Lake 9133 13.4 10.0 134 18.2 18.7 97 Monte Cristo 8932 36.7 27.3 134 35.4 28.0 126 Salt River Summit 7640 12.1 8.7 139 18.5 17.7 105 Spring Creek Divide 9000 24.8 23.6 105 25.9 25.3 102 ----- ----- Basin Index (%) 123 111 ----------------------------------------------------------------------------- -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. ---------------------------------------------------------------------------- -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.