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: APRIL 12 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 17.4 14.4 121 22.1 21.1 105 Black Bear 8170 42.9 36.7 117 45.4 38.5 118 Blind Bull Sum 8650 24.5 23.6 104 19.1 19.6 97 Cottonwood Creek 7670 21.4 20.5 104 26.5 24.9 106 East Rim Divide 7930 10.4 10.1 103 11.8 11.8 100 Grand Targhee 9260 45.4 40.0 114 32.3 31.3 103 Granite Creek 6770 17.1 13.3 129 20.9 19.7 106 Grassy Lake 7265 33.3 31.4 106 38.2 36.2 106 Gros Ventre Summit 8750 9.2 12.8 72 12.6 13.1 96 Gunsight Pass 9820 13.6 13.7 99 16.1 14.1 114 Lewis Lake Divide 7850 36.7 30.2 122 39.3 35.7 110 Phillips Bench 8200 29.4 25.9 114 33.0 28.4 116 Salt River Summit 7640 13.8 12.1 114 16.7 16.8 99 Snake River Station 6920 18.0 13.9 129 25.9 22.7 114 Spring Creek Divide 9000 23.3 22.9 102 23.8 24.0 99 Thumb Divide 7980 19.4 14.6 133 19.7 18.8 105 Togwotee Pass 9580 24.7 22.7 109 25.5 24.6 104 Two Ocean Plateau 9240 32.0 26.7 120 26.9 27.5 98 Willow Creek 8080 32.5 27.5 118 36.3 34.0 107 Younts Peak 8350 -M 14.5 * -M 16.0 * ----- ----- Basin Index (%) 113 106 MADISON-GALLATIN Black Bear 8170 42.9 36.7 117 45.4 38.5 118 Canyon 7870 13.9 12.3 113 16.9 16.4 103 Madison Plateau 7750 31.1 22.2 140 29.1 26.5 110 West Yellowstone 6700 11.7 8.6 136 18.0 14.2 127 Whiskey Creek 6800 18.9 14.6 129 22.0 20.3 108 ----- ----- Basin Index (%) 126 113 YELLOWSTONE Beartooth Lake 9360 21.9 21.8 100 20.1 20.0 100 Burnt Mtn 5880 6.9 2.4 288 14.3 13.3 108 Canyon 7870 13.9 12.3 113 16.9 16.4 103 Cole Creek 7850 17.4 15.3 114 -M 13.5 * Evening Star 9200 27.0 24.2 112 29.7 27.7 107 Fisher Creek 9100 34.1 31.6 108 36.0 32.0 112 Northeast Entrance 7350 9.2 8.5 108 15.0 12.4 121 Parker Peak 9400 24.6 20.1 122 24.8 17.9 139 Sylvan Lake 8420 21.6 19.8 109 27.9 22.6 123 Thumb Divide 7980 19.4 14.6 133 19.7 18.8 105 Two Ocean Plateau 9240 32.0 26.7 120 26.9 27.5 98 White Mill 8700 25.1 23.1 109 21.4 24.0 89 Wolverine 7650 9.8 9.2 107 12.9 12.3 105 Younts Peak 8350 -M 14.5 * -M 16.0 * ----- ----- Basin Index (%) 115 108 WIND RIVER Burroughs Creek 8750 11.3 -M * 13.0 -M * Castle Creek 8400 3.6 -M * 6.2 -M * Cold Springs 9630 7.5 6.1 123 8.2 10.3 80 Deer Park 9700 16.7 16.2 103 18.5 20.5 90 Hobbs Park 10100 16.5 14.8 111 13.0 14.0 93 Kirwin 9550 10.8 9.8 110 11.5 11.8 97 Little Warm 9370 9.8 10.3 95 9.2 13.1 70 Owl Creek 8975 4.4 5.6 79 6.7 6.3 106 South Pass 9040 15.2 15.8 96 12.7 17.8 71 St. Lawrence Alt 8620 -M 6.8 * -M 9.3 * Togwotee Pass 9580 24.7 22.7 109 25.5 24.6 104 Townsend Creek 8700 11.2 10.0 112 12.3 12.6 98 ----- ----- Basin Index (%) 105 90 BIGHORN BASIN Bald Mtn. 9380 17.1 19.3 89 12.3 17.4 71 Bear Trap Meadow 8200 5.5 4.6 120 6.9 8.8 78 Bone Springs Div 9350 12.7 17.0 75 11.4 15.9 72 Grave Springs 8550 8.4 9.6 88 9.7 11.0 88 Kirwin 9550 10.8 9.8 110 11.5 11.8 97 Marquette 8760 8.0 -M * 9.9 -M * Middle Powder 7760 8.2 12.4 66 8.0 12.1 66 Owl Creek 8975 4.4 5.6 79 6.7 6.3 106 Powder River Pass 9480 10.0 10.3 97 -M 13.0 * Shell Creek 9580 13.3 15.6 85 10.9 14.1 77 Timber Creek 7950 3.3 5.1 65 6.8 7.6 89 ----- ----- Basin Index (%) 86 80 SHOSHONE RIVER Blackwater 9780 25.2 23.3 108 25.4 20.9 122 Evening Star 9200 27.0 24.2 112 29.7 27.7 107 Marquette 8760 8.0 -M * 9.9 -M * Sylvan Lake 8420 21.6 19.8 109 27.9 22.6 123 Sylvan Road 7120 8.9 10.4 86 16.3 16.9 96 Younts Peak 8350 -M 14.5 * -M 16.0 * ----- ----- Basin Index (%) 106 113 POWDER RIVER Bear Trap Meadow 8200 5.5 4.6 120 6.9 8.8 78 Cloud Peak Reservoir 9860 11.9 15.3 78 11.0 13.8 80 Grave Springs 8550 8.4 9.6 88 9.7 11.0 88 Hansen Sawmill 8360 5.6 6.1 92 8.1 8.9 91 Middle Powder 7760 8.2 12.4 66 8.0 12.1 66 Powder River Pass 9480 10.0 10.3 97 -M 13.0 * Soldier Park 8720 3.3 -M * 7.1 -M * ----- ----- Basin Index (%) 85 80 TONGUE RIVER Big Goose 7990 8.0 9.9 81 9.9 12.0 82 Bone Springs Div 9350 12.7 17.0 75 11.4 15.9 72 Burgess Junction 7880 8.8 12.2 72 8.6 12.8 67 Dome Lake 8880 7.2 11.9 61 8.1 14.1 57 Little Goose 8870 9.4 -M * 8.1 -M * Sucker Creek 8880 10.8 12.5 86 9.7 14.9 65 Tie Creek 6870 3.9 5.2 75 10.8 12.1 89 ----- ----- Basin Index (%) 75 72 BELLE FOURCHE Blind Park 6890 3.8 6.2 61 7.8 12.3 63 Cole Canyon 5910 5.6 4.1 137 12.8 9.8 131 ----- ----- Basin Index (%) 91 93 CHEYENNE RIVER BASIN Blind Park 6890 3.8 6.2 61 7.8 12.3 63 North Rapid Creek 6130 4.6 6.0 77 7.6 10.3 74 ----- ----- Basin Index (%) 69 68 UPPER N. PLATTE Arapaho Ridge 10960 26.4 21.4 123 26.5 23.4 113 Blackhall Mtn 9820 32.9 -M * 34.0 -M * Columbine 9160 26.9 22.8 118 29.1 26.0 112 Divide Peak 8880 21.5 20.3 106 24.0 21.9 110 Joe Wright 10120 22.9 21.9 105 30.8 26.5 116 Laprele Creek 8375 13.0 9.4 138 14.8 12.9 115 Med Bow 10500 36.8 -M * 34.8 -M * Never Summer 10280 22.5 20.5 110 19.6 -M * North French Creek 10130 29.9 31.0 96 30.5 27.4 111 Old Battle 10000 36.9 32.0 115 37.1 35.6 104 Rawah 9020 12.4 10.2 122 17.7 14.9 119 Sage Creek Basin 7850 18.6 10.3 181 16.5 14.9 111 Sand Lake 10050 29.6 30.0 99 24.7 25.5 97 South Brush Creek 8440 9.0 11.5 78 12.5 15.7 80 Tower 10500 52.2 47.1 111 45.5 40.5 112 Webber Springs 9250 25.7 23.4 110 31.6 27.3 116 Whiskey Park 8950 31.3 27.6 113 33.1 28.4 117 Willow Creek Pass 9540 16.8 12.5 134 18.0 13.8 130 Zirkel 9340 32.8 25.1 131 38.1 29.1 131 ----- ----- Basin Index (%) 114 112 SWEETWATER Deer Park 9700 16.7 16.2 103 18.5 20.5 90 Larsen Creek 9000 9.4 11.1 85 14.4 -M * South Pass 9040 15.2 15.8 96 12.7 17.8 71 ----- ----- Basin Index (%) 96 81 LOWER N. PLATTE Casper Mtn. 7900 16.2 14.5 112 13.0 15.6 83 Laprele Creek 8375 13.0 9.4 138 14.8 12.9 115 Reno Hill 8400 17.0 14.2 120 17.8 16.1 111 Windy Peak 7900 9.9 7.5 132 11.6 10.9 106 ----- ----- Basin Index (%) 123 103 LARAMIE RIVER Brooklyn Lake 10240 24.3 22.3 109 25.7 21.7 118 Cinnabar Park 9574 20.7 21.4 97 23.9 24.8 96 Crow Creek 8330 4.9 5.9 83 11.1 11.3 98 Deadman Hill 10220 21.7 16.6 131 20.3 17.9 113 Rawah 9020 12.4 10.2 122 17.7 14.9 119 Roach 9700 17.8 16.5 108 22.2 19.7 113 Windy Peak 7900 9.9 7.5 132 11.6 10.9 106 ----- ----- Basin Index (%) 111 109 S. PLATTE Black Mountain 8920 12.4 -M * 14.1 -M * Crow Creek 8330 4.9 5.9 83 11.1 11.3 98 Deadman Hill 10220 21.7 16.6 131 20.3 17.9 113 ----- ----- Basin Index (%) 118 108 LITTLE SNAKE RIVER Battle Mountain 7440 10.0 8.0 125 17.0 15.3 111 Divide Peak 8880 21.5 20.3 106 24.0 21.9 110 Elk River 8700 18.6 18.2 102 20.3 20.5 99 Little Snake River 8915 28.6 26.0 110 38.0 30.6 124 Old Battle 10000 36.9 32.0 115 37.1 35.6 104 Sage Creek Basin 7850 18.6 10.3 181 16.5 14.9 111 Sandstone RS 8150 14.6 12.5 117 18.9 18.7 101 Whiskey Park 8950 31.3 27.6 113 33.1 28.4 117 ----- ----- Basin Index (%) 116 110 UPPER GREEN RIVER Big Sandy Opening 9080 14.0 12.9 109 14.7 13.5 109 Blind Bull Sum 8650 24.5 23.6 104 19.1 19.6 97 East Rim Divide 7930 10.4 10.1 103 11.8 11.8 100 Elkhart Park G.S. 9400 13.5 12.3 110 14.0 13.5 104 Gros Ventre Summit 8750 9.2 12.8 72 12.6 13.1 96 Gunsight Pass 9820 13.6 13.7 99 16.1 14.1 114 Indian Creek 9425 23.5 24.6 96 18.7 22.8 82 Kendall R.S. 7740 9.9 10.7 93 11.6 14.3 81 Loomis Park 8240 14.9 13.7 109 16.9 17.4 97 New Fork Lake 8340 10.0 9.9 101 9.7 10.9 89 Pocket Creek 9360 14.8 -M * 15.2 -M * Snider Basin 8060 10.4 12.2 85 13.3 14.3 93 Spring Creek Divide 9000 23.3 22.9 102 23.8 24.0 99 Triple Peak 8500 24.3 20.7 117 25.7 25.5 101 ----- ----- Basin Index (%) 101 97 LOWER GREEN RIVER Blacks Fork Jct 8869 9.9 -M * 14.3 -M * Buck Pasture 9632 16.4 -M * 20.7 -M * EF Blacks Fork GS 9360 13.2 -M * 12.8 -M * Hams Fork 7840 9.7 9.5 102 11.8 11.5 103 Hewinta 9500 12.9 10.5 123 16.5 14.4 115 Hickerson Park 9122 10.3 7.5 137 12.8 10.6 121 Hole-in-Rock 9168 7.8 7.1 110 11.7 10.1 116 Indian Creek 9425 23.5 24.6 96 18.7 22.8 82 Kelley R.S. 8180 15.2 14.2 107 16.3 18.3 89 Spirit Lk 10235 17.6 -M * 18.4 -M * Steel Creek Park 10158 17.5 16.1 109 20.4 17.0 120 ----- ----- Basin Index (%) 108 103 UPPER BEAR RIVER Bear River RS 8777 10.9 -M * 16.6 -M * Bug Lake 7987 23.7 19.1 124 24.0 19.7 122 Burts Miller Ranch 8000 6.0 -M * 9.5 -M * Chalk Creek #1 9171 27.9 24.7 113 31.4 25.8 122 Hayden Fork 9130 16.8 14.7 114 25.0 21.5 116 Kelley R.S. 8180 15.2 14.2 107 16.3 18.3 89 Lily Lake 9133 14.3 12.7 113 17.8 17.6 101 Monte Cristo 8932 35.0 27.8 126 32.4 26.5 122 Salt River Summit 7640 13.8 12.1 114 16.7 16.8 99 Spring Creek Divide 9000 23.3 22.9 102 23.8 24.0 99 ----- ----- Basin Index (%) 115 110 ----------------------------------------------------------------------------- -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.