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 FRIDAY: MAY 3 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 13.5 8.4 161 24.5 22.9 107 Black Bear 8170 42.9 37.3 115 48.9 42.0 116 Blind Bull Sum 8650 25.0 22.9 109 21.4 21.5 100 Cottonwood Creek 7670 19.0 14.7 129 29.4 27.7 106 East Rim Divide 7930 1.7 7.9 22 13.9 13.0 107 Grand Targhee 9260 48.0 45.5 105 37.5 34.9 107 Granite Creek 6770 12.8 7.8 164 23.5 21.5 109 Grassy Lake 7265 -M 28.3 * -M 39.5 * Gros Ventre Summit 8750 6.4 11.3 57 14.7 14.7 100 Gunsight Pass 9820 15.7 12.1 130 18.9 16.2 117 Lewis Lake Divide 7850 35.3 29.7 119 43.1 38.8 111 Phillips Bench 8200 28.8 24.8 116 35.8 30.9 116 Salt River Summit 7640 9.5 7.6 125 18.8 18.5 102 Snake River Station 6920 11.3 6.2 182 28.3 24.9 114 Spring Creek Divide 9000 24.7 24.3 102 26.5 26.4 100 Thumb Divide 7980 15.3 11.3 135 21.7 21.1 103 Togwotee Pass 9580 26.4 24.7 107 28.8 27.5 105 Two Ocean Plateau 9240 34.9 29.9 117 29.7 30.3 98 Willow Creek 8080 29.5 22.3 132 40.1 37.9 106 Younts Peak 8350 -M 15.7 * -M 17.8 * ----- ----- Basin Index (%) 115 107 MADISON-GALLATIN Black Bear 8170 42.9 37.3 115 48.9 42.0 116 Canyon 7870 12.6 9.6 131 18.4 18.1 102 Madison Plateau 7750 29.1 21.0 139 31.4 29.1 108 West Yellowstone 6700 1.8 .6 300* 19.1 16.0 119 Whiskey Creek 6800 16.1 13.8 117 23.9 22.5 106 ----- ----- Basin Index (%) 125 111 YELLOWSTONE Beartooth Lake 9360 24.6 22.7 108 22.9 22.1 104 Burnt Mtn 5880 3.8 .0 * 18.8 16.1 117 Canyon 7870 12.6 9.6 131 18.4 18.1 102 Cole Creek 7850 20.7 16.7 124 -M 16.6 * Evening Star 9200 29.3 24.8 118 34.0 30.6 111 Fisher Creek 9100 36.4 32.6 112 40.9 35.4 116 Northeast Entrance 7350 3.6 2.0 180 16.9 13.9 122 Parker Peak 9400 28.0 21.2 132 28.0 20.2 139 Sylvan Lake 8420 21.2 19.3 110 31.0 25.3 123 Thumb Divide 7980 15.3 11.3 135 21.7 21.1 103 Two Ocean Plateau 9240 34.9 29.9 117 29.7 30.3 98 White Mill 8700 27.7 23.9 116 24.2 26.5 91 Wolverine 7650 4.3 1.4 307 14.9 13.9 107 Younts Peak 8350 -M 15.7 * -M 17.8 * ----- ----- Basin Index (%) 122 110 WIND RIVER Burroughs Creek 8750 9.8 -M * 16.5 -M * Castle Creek 8400 .0 -M * 8.3 -M * Cold Springs 9630 5.1 1.3 392 11.1 12.6 88 Deer Park 9700 16.3 15.7 104 21.8 23.6 92 Hobbs Park 10100 17.7 16.0 111 16.1 16.9 95 Kirwin 9550 10.6 10.6 100 13.3 14.0 95 Little Warm 9370 9.4 8.4 112 10.8 15.5 70 Owl Creek 8975 .9 .7 129 9.0 8.1 111 South Pass 9040 13.9 14.4 97 15.5 20.5 76 St. Lawrence Alt 8620 -M 2.1 * -M 11.7 * Togwotee Pass 9580 26.4 24.7 107 28.8 27.5 105 Townsend Creek 8700 9.6 6.9 139 14.5 15.1 96 ----- ----- Basin Index (%) 111 92 BIGHORN BASIN Bald Mtn. 9380 17.9 20.5 87 14.4 19.9 72 Bear Trap Meadow 8200 .4 .6 67 8.4 10.8 78 Bone Springs Div 9350 15.1 16.4 92 14.0 18.4 76 Grave Springs 8550 7.5 9.4 80 11.0 13.0 85 Kirwin 9550 10.6 10.6 100 13.3 14.0 95 Marquette 8760 7.8 -M * 11.6 -M * Middle Powder 7760 6.1 11.4 54 10.8 14.3 76 Owl Creek 8975 .9 .7 129 9.0 8.1 111 Powder River Pass 9480 8.2 9.1 90 -M 15.2 * Shell Creek 9580 15.2 16.0 95 12.3 16.5 75 Timber Creek 7950 1.1 2.7 41 9.1 10.2 89 ----- ----- Basin Index (%) 85 82 SHOSHONE RIVER Blackwater 9780 28.9 25.7 112 29.5 23.7 124 Evening Star 9200 29.3 24.8 118 34.0 30.6 111 Marquette 8760 7.8 -M * 11.6 -M * Sylvan Lake 8420 21.2 19.3 110 31.0 25.3 123 Sylvan Road 7120 1.9 4.6 41 18.3 18.7 98 Younts Peak 8350 -M 15.7 * -M 17.8 * ----- ----- Basin Index (%) 109 115 POWDER RIVER Bear Trap Meadow 8200 .4 .6 67 8.4 10.8 78 Cloud Peak Reservoir 9860 13.0 16.4 79 13.3 16.9 79 Grave Springs 8550 7.5 9.4 80 11.0 13.0 85 Hansen Sawmill 8360 3.7 1.8 206 9.9 11.0 90 Middle Powder 7760 6.1 11.4 54 10.8 14.3 76 Powder River Pass 9480 8.2 9.1 90 -M 15.2 * Soldier Park 8720 1.2 -M * 9.0 -M * ----- ----- Basin Index (%) 80 81 TONGUE RIVER Big Goose 7990 8.0 9.3 86 12.6 14.3 88 Bone Springs Div 9350 15.1 16.4 92 14.0 18.4 76 Burgess Junction 7880 8.1 11.8 69 10.3 15.0 69 Dome Lake 8880 7.5 11.3 66 11.3 16.6 68 Little Goose 8870 10.3 -M * 10.0 -M * Sucker Creek 8880 10.5 12.0 88 12.2 17.6 69 Tie Creek 6870 1.4 2.5 56 13.4 14.6 92 ----- ----- Basin Index (%) 80 76 BELLE FOURCHE Blind Park 6890 .0 .2 0* 9.1 14.6 62 Cole Canyon 5910 .8 .1 800* 14.6 12.3 119 ----- ----- Basin Index (%) 267* 88 CHEYENNE RIVER BASIN Blind Park 6890 .0 .2 0* 9.1 14.6 62 North Rapid Creek 6130 .2 .5 40* -M 12.6 * ----- ----- Basin Index (%) 29* 62 UPPER N. PLATTE Arapaho Ridge 10960 25.3 22.3 113 29.7 26.4 112 Blackhall Mtn 9820 33.8 -M * 38.3 -M * Columbine 9160 17.8 17.5 102 32.3 28.8 112 Divide Peak 8880 15.7 17.8 88 27.2 24.6 111 Joe Wright 10120 22.5 22.9 98 34.3 30.2 114 Laprele Creek 8375 7.0 5.6 125 16.6 15.2 109 Med Bow 10500 42.6 -M * 40.7 -M * Never Summer 10280 25.2 21.8 116 22.6 -M * North French Creek 10130 32.4 32.8 99 34.8 31.1 112 Old Battle 10000 41.0 34.7 118 42.0 39.5 106 Rawah 9020 7.6 5.2 146 20.2 17.5 115 Sage Creek Basin 7850 9.5 1.0 950* 19.1 16.3 117 Sand Lake 10050 -M 31.5 * -M 29.3 * South Brush Creek 8440 2.1 8.4 25 14.8 18.1 82 Tower 10500 54.4 50.4 108 52.1 45.1 116 Webber Springs 9250 24.2 21.3 114 35.4 30.2 117 Whiskey Park 8950 29.6 26.8 110 37.5 31.8 118 Willow Creek Pass 9540 18.1 14.5 125 20.8 16.0 130 Zirkel 9340 27.5 20.8 132 42.5 31.2 136 ----- ----- Basin Index (%) 111 114 SWEETWATER Deer Park 9700 16.3 15.7 104 21.8 23.6 92 Larsen Creek 9000 3.5 8.6 41 16.5 -M * South Pass 9040 13.9 14.4 97 15.5 20.5 76 ----- ----- Basin Index (%) 87 85 LOWER N. PLATTE Casper Mtn. 7900 12.0 12.8 94 14.9 18.3 81 Laprele Creek 8375 7.0 5.6 125 16.6 15.2 109 Reno Hill 8400 15.4 12.2 126 20.6 19.2 107 Windy Peak 7900 4.9 3.4 144 13.0 13.2 98 ----- ----- Basin Index (%) 116 99 LARAMIE RIVER Brooklyn Lake 10240 24.9 23.1 108 30.3 25.0 121 Cinnabar Park 9574 19.7 19.0 104 27.6 27.3 101 Crow Creek 8330 .4 .0 * 13.2 13.6 97 Deadman Hill 10220 22.9 19.2 119 23.5 20.9 112 Rawah 9020 7.6 5.2 146 20.2 17.5 115 Roach 9700 16.1 17.1 94 25.7 22.5 114 Windy Peak 7900 4.9 3.4 144 13.0 13.2 98 ----- ----- Basin Index (%) 111 110 S. PLATTE Black Mountain 8920 9.4 -M * 16.9 -M * Crow Creek 8330 .4 .0 * 13.2 13.6 97 Deadman Hill 10220 22.9 19.2 119 23.5 20.9 112 ----- ----- Basin Index (%) 121* 106 LITTLE SNAKE RIVER Battle Mountain 7440 1.6 .0 * 20.1 17.3 116 Divide Peak 8880 15.7 17.8 88 27.2 24.6 111 Elk River 8700 12.9 12.5 103 23.1 23.0 100 Little Snake River 8915 27.0 21.8 124 43.1 33.1 130 Old Battle 10000 41.0 34.7 118 42.0 39.5 106 Sage Creek Basin 7850 9.5 1.0 950* 19.1 16.3 117 Sandstone RS 8150 8.1 5.1 159 21.9 21.0 104 Whiskey Park 8950 29.6 26.8 110 37.5 31.8 118 ----- ----- Basin Index (%) 121 113 UPPER GREEN RIVER Big Sandy Opening 9080 13.8 9.8 141 17.4 15.3 114 Blind Bull Sum 8650 25.0 22.9 109 21.4 21.5 100 East Rim Divide 7930 1.7 7.9 22 13.9 13.0 107 Elkhart Park G.S. 9400 14.2 10.8 131 16.9 15.2 111 Gros Ventre Summit 8750 6.4 11.3 57 14.7 14.7 100 Gunsight Pass 9820 15.7 12.1 130 18.9 16.2 117 Indian Creek 9425 21.9 22.5 97 20.5 25.2 81 Kendall R.S. 7740 5.1 3.2 159 13.9 15.6 89 Loomis Park 8240 12.5 10.5 119 19.7 19.1 103 New Fork Lake 8340 6.3 6.0 105 11.8 12.3 96 Pocket Creek 9360 14.5 -M * 17.4 -M * Snider Basin 8060 3.1 8.9 35 14.9 15.7 95 Spring Creek Divide 9000 24.7 24.3 102 26.5 26.4 100 Triple Peak 8500 20.7 16.7 124 29.1 28.1 104 ----- ----- Basin Index (%) 103 101 LOWER GREEN RIVER Blacks Fork Jct 8869 4.7 -M * 15.8 -M * Buck Pasture 9632 15.1 -M * 23.9 -M * EF Blacks Fork GS 9360 8.1 -M * 14.9 -M * Hams Fork 7840 1.3 2.0 65 13.9 13.2 105 Hewinta 9500 7.2 4.4 164 18.1 16.4 110 Hickerson Park 9122 4.3 3.5 123 14.1 12.2 116 Hole-in-Rock 9168 2.2 2.0 110 13.5 11.6 116 Indian Creek 9425 21.9 22.5 97 20.5 25.2 81 Kelley R.S. 8180 11.4 10.8 106 18.2 20.3 90 Spirit Lk 10235 15.0 -M * 19.9 -M * Steel Creek Park 10158 18.0 17.4 103 22.8 19.3 118 ----- ----- Basin Index (%) 106 102 UPPER BEAR RIVER Bear River RS 8777 3.6 -M * 17.9 -M * Bug Lake 7987 20.5 14.2 144 27.2 21.8 125 Burts Miller Ranch 8000 -M -M * 10.2 -M * Chalk Creek #1 9171 24.6 23.8 103 33.5 28.7 117 Hayden Fork 9130 11.1 8.8 126 27.1 24.0 113 Kelley R.S. 8180 11.4 10.8 106 18.2 20.3 90 Lily Lake 9133 10.8 9.9 109 19.4 19.8 98 Monte Cristo 8932 33.8 25.8 131 36.2 29.5 123 Salt River Summit 7640 9.5 7.6 125 18.8 18.5 102 Spring Creek Divide 9000 24.7 24.3 102 26.5 26.4 100 ----- ----- Basin Index (%) 117 109 ----------------------------------------------------------------------------- -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.