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 SUNDAY: APRIL 28 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 13.9 10.2 136 24.2 22.4 108 Black Bear 8170 42.6 37.1 115 48.7 41.2 118 Blind Bull Sum 8650 24.6 23.9 103 21.1 20.9 101 Cottonwood Creek 7670 19.4 16.4 118 29.2 26.9 109 East Rim Divide 7930 3.2 8.6 37 13.6 12.6 108 Grand Targhee 9260 -M 43.8 * -M 33.9 * Granite Creek 6770 13.5 8.8 153 23.3 20.9 111 Grassy Lake 7265 -M 29.9 * -M 38.7 * Gros Ventre Summit 8750 7.1 12.0 59 13.8 14.3 97 Gunsight Pass 9820 -M 13.2 * -M 15.7 * Lewis Lake Divide 7850 -M 30.5 * -M 38.0 * Phillips Bench 8200 -M 25.6 * -M 30.2 * Salt River Summit 7640 -M 8.2 * -M 18.1 * Snake River Station 6920 -M 8.9 * -M 24.3 * Spring Creek Divide 9000 24.0 24.1 100 26.1 25.8 101 Thumb Divide 7980 15.4 13.7 112 21.1 20.6 102 Togwotee Pass 9580 25.4 24.7 103 27.9 26.8 104 Two Ocean Plateau 9240 33.7 29.4 115 29.0 29.6 98 Willow Creek 8080 30.4 24.5 124 39.5 36.9 107 Younts Peak 8350 -M 15.2 * -M 17.3 * ----- ----- Basin Index (%) 108 106 MADISON-GALLATIN Black Bear 8170 42.6 37.1 115 48.7 41.2 118 Canyon 7870 12.7 11.3 112 18.2 17.7 103 Madison Plateau 7750 29.1 22.1 132 31.2 28.4 110 West Yellowstone 6700 2.9 3.7 78 18.9 15.6 121 Whiskey Creek 6800 16.4 15.2 108 23.8 22.0 108 ----- ----- Basin Index (%) 116 113 YELLOWSTONE Beartooth Lake 9360 24.1 23.2 104 22.5 21.6 104 Burnt Mtn 5880 2.6 .0 * 17.1 15.2 112 Canyon 7870 12.7 11.3 112 18.2 17.7 103 Cole Creek 7850 19.1 16.3 117 -M 15.8 * Evening Star 9200 28.4 24.8 115 33.1 29.9 111 Fisher Creek 9100 36.3 33.1 110 40.0 34.6 116 Northeast Entrance 7350 4.2 4.4 95 16.6 13.5 123 Parker Peak 9400 27.1 21.7 125 27.4 19.6 140 Sylvan Lake 8420 -M 20.3 * -M 24.6 * Thumb Divide 7980 15.4 13.7 112 21.1 20.6 102 Two Ocean Plateau 9240 33.7 29.4 115 29.0 29.6 98 White Mill 8700 27.3 23.8 115 23.7 25.8 92 Wolverine 7650 4.4 4.2 105 14.5 13.5 107 Younts Peak 8350 -M 15.2 * -M 17.3 * ----- ----- Basin Index (%) 114 109 WIND RIVER Burroughs Creek 8750 -M -M * -M -M * Castle Creek 8400 .0 -M * 8.0 -M * Cold Springs 9630 4.7 2.0 235 10.1 12.0 84 Deer Park 9700 15.8 16.3 97 20.9 23.0 91 Hobbs Park 10100 16.9 15.8 107 15.0 16.3 92 Kirwin 9550 10.2 10.3 99 12.7 13.4 95 Little Warm 9370 8.5 9.1 93 10.4 14.8 70 Owl Creek 8975 .1 1.7 6 8.2 7.6 108 South Pass 9040 13.5 15.1 89 14.3 20.0 72 St. Lawrence Alt 8620 -M 3.8 * -M 11.2 * Togwotee Pass 9580 25.4 24.7 103 27.9 26.8 104 Townsend Creek 8700 9.0 8.2 110 13.5 14.6 92 ----- ----- Basin Index (%) 101 90 BIGHORN BASIN Bald Mtn. 9380 17.2 20.5 84 13.9 19.2 72 Bear Trap Meadow 8200 .0 1.5 0 7.8 10.2 76 Bone Springs Div 9350 13.8 16.5 84 13.1 17.7 74 Grave Springs 8550 7.6 9.2 83 10.7 12.4 86 Kirwin 9550 10.2 10.3 99 12.7 13.4 95 Marquette 8760 6.5 -M * 10.8 -M * Middle Powder 7760 6.2 12.1 51 10.2 13.8 74 Owl Creek 8975 .1 1.7 6 8.2 7.6 108 Powder River Pass 9480 8.3 9.8 85 -M 14.6 * Shell Creek 9580 14.4 16.0 90 11.8 15.8 75 Timber Creek 7950 .0 3.5 0 7.8 9.5 82 ----- ----- Basin Index (%) 77 80 SHOSHONE RIVER Blackwater 9780 27.6 24.9 111 28.2 22.9 123 Evening Star 9200 28.4 24.8 115 33.1 29.9 111 Marquette 8760 6.5 -M * 10.8 -M * Sylvan Lake 8420 -M 20.3 * -M 24.6 * Sylvan Road 7120 2.2 7.1 31 17.9 18.2 98 Younts Peak 8350 -M 15.2 * -M 17.3 * ----- ----- Basin Index (%) 102 112 POWDER RIVER Bear Trap Meadow 8200 .0 1.5 0 7.8 10.2 76 Cloud Peak Reservoir 9860 12.3 16.5 75 12.2 16.1 76 Grave Springs 8550 7.6 9.2 83 10.7 12.4 86 Hansen Sawmill 8360 3.1 3.6 86 9.1 10.5 87 Middle Powder 7760 6.2 12.1 51 10.2 13.8 74 Powder River Pass 9480 8.3 9.8 85 -M 14.6 * Soldier Park 8720 .4 -M * 8.1 -M * ----- ----- Basin Index (%) 71 79 TONGUE RIVER Big Goose 7990 6.9 9.1 76 11.4 13.6 84 Bone Springs Div 9350 13.8 16.5 84 13.1 17.7 74 Burgess Junction 7880 7.6 12.2 62 9.5 14.4 66 Dome Lake 8880 6.3 11.7 54 10.1 16.0 63 Little Goose 8870 8.5 -M * 9.0 -M * Sucker Creek 8880 9.5 12.5 76 11.0 16.9 65 Tie Creek 6870 .3 2.8 11 12.0 13.8 87 ----- ----- Basin Index (%) 69 73 BELLE FOURCHE Blind Park 6890 -M 2.3 * 8.7 13.9 63 Cole Canyon 5910 .0 .3 0* 13.5 11.4 118 ----- ----- Basin Index (%) 0* 88 CHEYENNE RIVER BASIN Blind Park 6890 -M 2.3 * 8.7 13.9 63 North Rapid Creek 6130 .0 2.3 0 -M 11.9 * ----- ----- Basin Index (%) 0 63 UPPER N. PLATTE Arapaho Ridge 10960 23.7 22.3 106 28.0 25.8 109 Blackhall Mtn 9820 32.0 -M * 35.7 -M * Columbine 9160 17.2 19.5 88 31.0 28.1 110 Divide Peak 8880 14.0 18.0 78 24.9 23.9 104 Joe Wright 10120 21.0 23.5 89 32.5 29.3 111 Laprele Creek 8375 7.0 6.9 101 15.6 14.7 106 Med Bow 10500 40.5 -M * 38.2 -M * Never Summer 10280 23.5 21.5 109 20.9 -M * North French Creek 10130 30.1 33.0 91 32.6 30.2 108 Old Battle 10000 38.0 34.6 110 38.7 38.6 100 Rawah 9020 6.8 7.4 92 18.9 17.0 111 Sage Creek Basin 7850 8.7 1.4 621 17.6 15.9 111 Sand Lake 10050 -M 31.2 * -M 28.5 * South Brush Creek 8440 1.5 9.9 15 13.3 17.5 76 Tower 10500 50.3 49.8 101 49.5 44.1 112 Webber Springs 9250 23.0 22.0 105 33.0 29.5 112 Whiskey Park 8950 26.6 25.9 103 34.6 30.9 112 Willow Creek Pass 9540 16.2 13.8 117 19.1 15.4 124 Zirkel 9340 26.1 21.6 121 40.4 30.5 132 ----- ----- Basin Index (%) 101 110 SWEETWATER Deer Park 9700 15.8 16.3 97 20.9 23.0 91 Larsen Creek 9000 4.4 9.5 46 16.0 -M * South Pass 9040 13.5 15.1 89 14.3 20.0 72 ----- ----- Basin Index (%) 82 82 LOWER N. PLATTE Casper Mtn. 7900 11.6 14.1 82 14.4 17.6 82 Laprele Creek 8375 7.0 6.9 101 15.6 14.7 106 Reno Hill 8400 14.9 13.4 111 19.7 18.4 107 Windy Peak 7900 4.8 5.1 94 13.1 12.7 103 ----- ----- Basin Index (%) 97 99 LARAMIE RIVER Brooklyn Lake 10240 23.5 23.1 102 28.4 24.2 117 Cinnabar Park 9574 18.7 20.0 94 25.8 26.6 97 Crow Creek 8330 .0 .0 * 12.1 13.1 92 Deadman Hill 10220 21.2 18.6 114 21.9 20.2 108 Rawah 9020 6.8 7.4 92 18.9 17.0 111 Roach 9700 14.7 17.1 86 23.7 21.9 108 Windy Peak 7900 4.8 5.1 94 13.1 12.7 103 ----- ----- Basin Index (%) 98 106 S. PLATTE Black Mountain 8920 8.9 -M * 15.8 -M * Crow Creek 8330 .0 .0 * 12.1 13.1 92 Deadman Hill 10220 21.2 18.6 114 21.9 20.2 108 ----- ----- Basin Index (%) 114* 102 LITTLE SNAKE RIVER Battle Mountain 7440 .3 .6 50* 17.5 16.9 104 Divide Peak 8880 14.0 18.0 78 24.9 23.9 104 Elk River 8700 11.7 14.1 83 21.0 22.3 94 Little Snake River 8915 23.9 22.9 104 40.0 32.1 125 Old Battle 10000 38.0 34.6 110 38.7 38.6 100 Sage Creek Basin 7850 8.7 1.4 621 17.6 15.9 111 Sandstone RS 8150 6.3 7.2 88 19.2 20.4 94 Whiskey Park 8950 26.6 25.9 103 34.6 30.9 112 ----- ----- Basin Index (%) 104 106 UPPER GREEN RIVER Big Sandy Opening 9080 13.7 11.6 118 16.5 14.9 111 Blind Bull Sum 8650 24.6 23.9 103 21.1 20.9 101 East Rim Divide 7930 3.2 8.6 37 13.6 12.6 108 Elkhart Park G.S. 9400 13.5 11.7 115 16.0 14.7 109 Gros Ventre Summit 8750 7.1 12.0 59 13.8 14.3 97 Gunsight Pass 9820 -M 13.2 * -M 15.7 * Indian Creek 9425 22.0 23.7 93 20.2 24.6 82 Kendall R.S. 7740 5.2 5.6 93 13.2 15.2 87 Loomis Park 8240 12.4 11.4 109 19.2 18.6 103 New Fork Lake 8340 6.2 6.9 90 11.1 11.8 94 Pocket Creek 9360 14.1 -M * 16.8 -M * Snider Basin 8060 -M 9.9 * -M 15.3 * Spring Creek Divide 9000 24.0 24.1 100 26.1 25.8 101 Triple Peak 8500 21.0 18.5 114 28.7 27.4 105 ----- ----- Basin Index (%) 97 99 LOWER GREEN RIVER Blacks Fork Jct 8869 -M -M * -M -M * Buck Pasture 9632 -M -M * -M -M * EF Blacks Fork GS 9360 8.5 -M * 13.8 -M * Hams Fork 7840 3.0 4.1 73 13.6 12.8 106 Hewinta 9500 -M 5.7 * -M 15.8 * Hickerson Park 9122 4.9 4.9 100 13.5 11.8 114 Hole-in-Rock 9168 2.9 3.8 76 13.0 11.2 116 Indian Creek 9425 22.0 23.7 93 20.2 24.6 82 Kelley R.S. 8180 12.0 11.8 102 18.0 19.8 91 Spirit Lk 10235 14.8 -M * 19.1 -M * Steel Creek Park 10158 17.0 16.8 101 21.8 18.7 117 ----- ----- Basin Index (%) 95 101 UPPER BEAR RIVER Bear River RS 8777 4.8 -M * 17.3 -M * Bug Lake 7987 20.1 15.9 126 26.9 21.3 126 Burts Miller Ranch 8000 -M -M * 10.1 -M * Chalk Creek #1 9171 24.9 24.6 101 32.7 27.9 117 Hayden Fork 9130 -M 9.9 * -M 23.3 * Kelley R.S. 8180 12.0 11.8 102 18.0 19.8 91 Lily Lake 9133 11.0 9.8 112 18.6 19.2 97 Monte Cristo 8932 34.5 27.2 127 35.8 28.7 125 Salt River Summit 7640 -M 8.2 * -M 18.1 * Spring Creek Divide 9000 24.0 24.1 100 26.1 25.8 101 ----- ----- Basin Index (%) 112 111 ----------------------------------------------------------------------------- -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.