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 TUESDAY: APRIL 30 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 13.6 9.7 140 24.3 22.6 108 Black Bear 8170 42.7 37.4 114 48.8 41.6 117 Blind Bull Sum 8650 24.5 23.4 105 21.3 21.2 100 Cottonwood Creek 7670 18.9 15.7 120 29.1 27.3 107 East Rim Divide 7930 2.2 8.3 27 13.7 12.9 106 Grand Targhee 9260 47.9 44.4 108 37.4 34.4 109 Granite Creek 6770 13.2 8.5 155 23.4 21.3 110 Grassy Lake 7265 -M 29.4 * -M 39.1 * Gros Ventre Summit 8750 6.4 11.7 55 14.1 14.5 97 Gunsight Pass 9820 15.1 12.8 118 18.3 16.0 114 Lewis Lake Divide 7850 35.4 30.3 117 42.9 38.4 112 Phillips Bench 8200 29.0 25.6 113 35.7 30.5 117 Salt River Summit 7640 9.4 8.0 118 18.6 18.3 102 Snake River Station 6920 11.8 7.9 149 28.2 24.6 115 Spring Creek Divide 9000 24.0 24.3 99 26.2 26.1 100 Thumb Divide 7980 15.3 12.9 119 21.4 20.8 103 Togwotee Pass 9580 25.9 24.7 105 28.2 27.1 104 Two Ocean Plateau 9240 34.0 29.7 114 29.2 29.9 98 Willow Creek 8080 29.8 23.5 127 39.7 37.4 106 Younts Peak 8350 -M 15.4 * -M 17.5 * ----- ----- Basin Index (%) 111 108 MADISON-GALLATIN Black Bear 8170 42.7 37.4 114 48.8 41.6 117 Canyon 7870 12.5 10.8 116 18.3 17.9 102 Madison Plateau 7750 28.9 21.6 134 31.3 28.8 109 West Yellowstone 6700 2.6 2.5 104 19.0 15.9 119 Whiskey Creek 6800 16.2 14.9 109 23.8 22.2 107 ----- ----- Basin Index (%) 118 112 YELLOWSTONE Beartooth Lake 9360 24.2 22.9 106 22.6 21.8 104 Burnt Mtn 5880 3.1 .0 * 17.8 15.5 115 Canyon 7870 12.5 10.8 116 18.3 17.9 102 Cole Creek 7850 19.7 16.4 120 -M 16.2 * Evening Star 9200 28.6 24.9 115 33.3 30.2 110 Fisher Creek 9100 36.2 32.8 110 40.3 34.9 115 Northeast Entrance 7350 3.9 3.5 111 16.7 13.7 122 Parker Peak 9400 27.2 21.4 127 27.4 19.9 138 Sylvan Lake 8420 20.8 20.1 103 30.5 24.9 122 Thumb Divide 7980 15.3 12.9 119 21.4 20.8 103 Two Ocean Plateau 9240 34.0 29.7 114 29.2 29.9 98 White Mill 8700 27.5 23.8 116 23.8 26.1 91 Wolverine 7650 4.2 3.1 135 14.5 13.7 106 Younts Peak 8350 -M 15.4 * -M 17.5 * ----- ----- Basin Index (%) 116 110 WIND RIVER Burroughs Creek 8750 9.1 -M * 15.7 -M * Castle Creek 8400 .0 -M * 7.9 -M * Cold Springs 9630 4.2 1.4 300 10.1 12.4 81 Deer Park 9700 15.4 16.1 96 20.8 23.2 90 Hobbs Park 10100 16.7 16.0 104 15.0 16.5 91 Kirwin 9550 9.9 10.4 95 12.5 13.6 92 Little Warm 9370 8.6 8.8 98 10.0 15.3 65 Owl Creek 8975 .0 1.2 0 8.3 7.8 106 South Pass 9040 13.1 15.0 87 14.2 20.2 70 St. Lawrence Alt 8620 -M 3.0 * -M 11.4 * Togwotee Pass 9580 25.9 24.7 105 28.2 27.1 104 Townsend Creek 8700 8.5 7.8 109 13.3 14.8 90 ----- ----- Basin Index (%) 101 88 BIGHORN BASIN Bald Mtn. 9380 17.2 20.5 84 13.9 19.5 71 Bear Trap Meadow 8200 .0 1.1 0 7.8 10.4 75 Bone Springs Div 9350 14.2 16.6 86 13.2 18.0 73 Grave Springs 8550 7.4 9.4 79 10.5 12.6 83 Kirwin 9550 9.9 10.4 95 12.5 13.6 92 Marquette 8760 6.8 -M * 10.9 -M * Middle Powder 7760 6.2 11.8 53 10.6 14.0 76 Owl Creek 8975 .0 1.2 0 8.3 7.8 106 Powder River Pass 9480 8.2 9.6 85 -M 14.9 * Shell Creek 9580 14.5 16.0 91 12.0 16.1 75 Timber Creek 7950 .1 3.2 3 8.1 9.8 83 ----- ----- Basin Index (%) 78 80 SHOSHONE RIVER Blackwater 9780 28.0 25.2 111 28.6 23.3 123 Evening Star 9200 28.6 24.9 115 33.3 30.2 110 Marquette 8760 6.8 -M * 10.9 -M * Sylvan Lake 8420 20.8 20.1 103 30.5 24.9 122 Sylvan Road 7120 1.8 6.3 29 18.1 18.5 98 Younts Peak 8350 -M 15.4 * -M 17.5 * ----- ----- Basin Index (%) 104 114 POWDER RIVER Bear Trap Meadow 8200 .0 1.1 0 7.8 10.4 75 Cloud Peak Reservoir 9860 12.3 16.5 75 12.1 16.4 74 Grave Springs 8550 7.4 9.4 79 10.5 12.6 83 Hansen Sawmill 8360 3.0 2.9 103 9.0 10.7 84 Middle Powder 7760 6.2 11.8 53 10.6 14.0 76 Powder River Pass 9480 8.2 9.6 85 -M 14.9 * Soldier Park 8720 .1 -M * 8.0 -M * ----- ----- Basin Index (%) 72 78 TONGUE RIVER Big Goose 7990 7.1 9.2 77 11.6 13.8 84 Bone Springs Div 9350 14.2 16.6 86 13.2 18.0 73 Burgess Junction 7880 7.7 12.1 64 9.8 14.6 67 Dome Lake 8880 6.3 11.5 55 10.3 16.2 64 Little Goose 8870 8.8 -M * 9.2 -M * Sucker Creek 8880 9.7 12.3 79 11.3 17.1 66 Tie Creek 6870 .2 2.7 7 12.1 14.1 86 ----- ----- Basin Index (%) 70 73 BELLE FOURCHE Blind Park 6890 -M 1.3 * 8.7 14.1 62 Cole Canyon 5910 .0 .3 0* 13.6 11.5 118 ----- ----- Basin Index (%) 0* 87 CHEYENNE RIVER BASIN Blind Park 6890 -M 1.3 * 8.7 14.1 62 North Rapid Creek 6130 .0 1.3 0 -M 12.0 * ----- ----- Basin Index (%) 0 62 UPPER N. PLATTE Arapaho Ridge 10960 24.4 22.3 109 29.0 26.0 112 Blackhall Mtn 9820 32.8 -M * 37.2 -M * Columbine 9160 17.1 18.6 92 31.6 28.4 111 Divide Peak 8880 14.3 18.0 79 25.2 24.1 105 Joe Wright 10120 21.9 23.4 94 33.5 29.6 113 Laprele Creek 8375 6.5 6.4 102 15.7 14.9 105 Med Bow 10500 41.6 -M * 39.5 -M * Never Summer 10280 24.5 21.7 113 21.9 -M * North French Creek 10130 30.9 32.9 94 33.7 30.5 110 Old Battle 10000 39.5 34.7 114 39.9 39.0 102 Rawah 9020 7.4 6.5 114 19.8 17.1 116 Sage Creek Basin 7850 8.6 1.1 782* 17.9 16.1 111 Sand Lake 10050 -M 31.3 * -M 28.9 * South Brush Creek 8440 1.6 9.6 17 13.9 17.7 79 Tower 10500 51.9 49.9 104 50.0 44.5 112 Webber Springs 9250 23.5 21.9 107 34.4 29.8 115 Whiskey Park 8950 27.9 26.3 106 36.2 31.3 116 Willow Creek Pass 9540 17.6 14.1 125 20.2 15.6 129 Zirkel 9340 26.3 21.2 124 41.4 30.8 134 ----- ----- Basin Index (%) 105 112 SWEETWATER Deer Park 9700 15.4 16.1 96 20.8 23.2 90 Larsen Creek 9000 3.3 9.3 35 15.9 -M * South Pass 9040 13.1 15.0 87 14.2 20.2 70 ----- ----- Basin Index (%) 79 81 LOWER N. PLATTE Casper Mtn. 7900 11.5 13.7 84 14.4 17.8 81 Laprele Creek 8375 6.5 6.4 102 15.7 14.9 105 Reno Hill 8400 14.6 12.8 114 19.6 18.7 105 Windy Peak 7900 4.2 4.4 95 12.6 12.9 98 ----- ----- Basin Index (%) 99 97 LARAMIE RIVER Brooklyn Lake 10240 24.0 23.3 103 29.4 24.5 120 Cinnabar Park 9574 19.1 19.7 97 26.9 26.8 100 Crow Creek 8330 .5 .0 * 12.8 13.3 96 Deadman Hill 10220 22.2 18.9 117 22.7 20.5 111 Rawah 9020 7.4 6.5 114 19.8 17.1 116 Roach 9700 15.3 17.2 89 24.5 22.2 110 Windy Peak 7900 4.2 4.4 95 12.6 12.9 98 ----- ----- Basin Index (%) 103 108 S. PLATTE Black Mountain 8920 9.1 -M * 16.4 -M * Crow Creek 8330 .5 .0 * 12.8 13.3 96 Deadman Hill 10220 22.2 18.9 117 22.7 20.5 111 ----- ----- Basin Index (%) 120* 105 LITTLE SNAKE RIVER Battle Mountain 7440 1.2 .0 * 18.6 17.0 109 Divide Peak 8880 14.3 18.0 79 25.2 24.1 105 Elk River 8700 11.5 13.6 85 21.7 22.5 96 Little Snake River 8915 25.4 22.5 113 41.6 32.5 128 Old Battle 10000 39.5 34.7 114 39.9 39.0 102 Sage Creek Basin 7850 8.6 1.1 782* 17.9 16.1 111 Sandstone RS 8150 7.2 6.3 114 20.4 20.6 99 Whiskey Park 8950 27.9 26.3 106 36.2 31.3 116 ----- ----- Basin Index (%) 111 109 UPPER GREEN RIVER Big Sandy Opening 9080 13.1 10.9 120 16.6 15.1 110 Blind Bull Sum 8650 24.5 23.4 105 21.3 21.2 100 East Rim Divide 7930 2.2 8.3 27 13.7 12.9 106 Elkhart Park G.S. 9400 13.4 11.5 117 16.0 14.9 107 Gros Ventre Summit 8750 6.4 11.7 55 14.1 14.5 97 Gunsight Pass 9820 15.1 12.8 118 18.3 16.0 114 Indian Creek 9425 21.4 23.3 92 20.3 24.9 82 Kendall R.S. 7740 4.9 4.8 102 13.4 15.4 87 Loomis Park 8240 12.4 11.2 111 19.3 18.8 103 New Fork Lake 8340 5.8 6.6 88 11.2 12.0 93 Pocket Creek 9360 13.8 -M * 16.8 -M * Snider Basin 8060 3.7 9.5 39 14.7 15.5 95 Spring Creek Divide 9000 24.0 24.3 99 26.2 26.1 100 Triple Peak 8500 20.5 17.9 115 28.7 27.8 103 ----- ----- Basin Index (%) 95 99 LOWER GREEN RIVER Blacks Fork Jct 8869 4.3 -M * 15.3 -M * Buck Pasture 9632 14.3 -M * 23.1 -M * EF Blacks Fork GS 9360 7.6 -M * 14.3 -M * Hams Fork 7840 2.1 3.3 64 13.7 13.0 105 Hewinta 9500 6.8 5.0 136 17.6 16.0 110 Hickerson Park 9122 4.0 4.5 89 13.7 11.9 115 Hole-in-Rock 9168 1.9 2.9 66 13.0 11.4 114 Indian Creek 9425 21.4 23.3 92 20.3 24.9 82 Kelley R.S. 8180 11.3 11.7 97 18.0 20.1 90 Spirit Lk 10235 14.4 -M * 19.4 -M * Steel Creek Park 10158 16.9 17.0 99 22.2 18.9 117 ----- ----- Basin Index (%) 95 102 UPPER BEAR RIVER Bear River RS 8777 3.6 -M * 17.5 -M * Bug Lake 7987 20.0 15.4 130 26.9 21.6 125 Burts Miller Ranch 8000 -M -M * 10.2 -M * Chalk Creek #1 9171 24.2 24.4 99 32.9 28.2 117 Hayden Fork 9130 9.9 9.5 104 26.5 23.6 112 Kelley R.S. 8180 11.3 11.7 97 18.0 20.1 90 Lily Lake 9133 10.2 9.9 103 18.9 19.4 97 Monte Cristo 8932 33.6 26.9 125 35.8 29.1 123 Salt River Summit 7640 9.4 8.0 118 18.6 18.3 102 Spring Creek Divide 9000 24.0 24.3 99 26.2 26.1 100 ----- ----- Basin Index (%) 110 109 ----------------------------------------------------------------------------- -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.