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 7 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 16.9 15.2 111 20.8 20.6 101 Black Bear 8170 43.4 37.2 117 42.3 37.8 112 Blind Bull Sum 8650 23.6 23.2 102 18.5 19.3 96 Cottonwood Creek 7670 20.4 21.0 97 25.3 24.3 104 East Rim Divide 7930 10.8 10.2 106 11.5 11.6 99 Grand Targhee 9260 43.0 38.5 112 31.4 30.6 103 Granite Creek 6770 18.1 14.5 125 20.1 19.5 103 Grassy Lake 7265 33.2 31.5 105 36.6 35.5 103 Gros Ventre Summit 8750 8.4 12.9 65 11.6 12.8 91 Gunsight Pass 9820 12.7 13.8 92 15.1 13.7 110 Lewis Lake Divide 7850 35.5 29.9 119 37.4 34.9 107 Phillips Bench 8200 29.3 25.4 115 31.2 27.8 112 Salt River Summit 7640 13.5 12.8 105 15.9 16.5 96 Snake River Station 6920 19.3 14.9 130 24.9 22.1 113 Spring Creek Divide 9000 22.9 22.5 102 23.3 23.5 99 Thumb Divide 7980 18.9 14.7 129 18.6 18.4 101 Togwotee Pass 9580 23.3 22.1 105 24.1 24.0 100 Two Ocean Plateau 9240 29.5 26.0 113 24.9 26.8 93 Willow Creek 8080 31.2 28.4 110 34.3 33.2 103 Younts Peak 8350 -M 14.3 * -M 15.6 * ----- ----- Basin Index (%) 109 103 MADISON-GALLATIN Black Bear 8170 43.4 37.2 117 42.3 37.8 112 Canyon 7870 13.7 12.4 110 15.8 16.0 99 Madison Plateau 7750 27.8 21.5 129 27.2 26.0 105 West Yellowstone 6700 12.5 9.5 132 16.8 14.1 119 Whiskey Creek 6800 19.4 14.8 131 20.0 19.9 101 ----- ----- Basin Index (%) 122 107 YELLOWSTONE Beartooth Lake 9360 19.5 21.3 92 18.0 19.4 93 Burnt Mtn 5880 7.0 4.5 156 12.7 12.9 98 Canyon 7870 13.7 12.4 110 15.8 16.0 99 Cole Creek 7850 15.3 14.6 105 -M 12.8 * Evening Star 9200 24.7 23.8 104 27.5 26.9 102 Fisher Creek 9100 30.5 31.2 98 33.2 31.2 106 Northeast Entrance 7350 9.5 9.0 106 13.1 12.0 109 Parker Peak 9400 22.9 19.4 118 23.3 17.4 134 Sylvan Lake 8420 20.8 19.4 107 26.6 21.9 121 Thumb Divide 7980 18.9 14.7 129 18.6 18.4 101 Two Ocean Plateau 9240 29.5 26.0 113 24.9 26.8 93 White Mill 8700 21.8 22.2 98 18.7 23.3 80 Wolverine 7650 10.9 9.6 114 12.3 12.0 102 Younts Peak 8350 -M 14.3 * -M 15.6 * ----- ----- Basin Index (%) 107 103 WIND RIVER Burroughs Creek 8750 10.5 -M * 12.3 -M * Castle Creek 8400 3.8 -M * 5.6 -M * Cold Springs 9630 7.2 6.7 107 7.3 9.9 74 Deer Park 9700 15.7 15.6 101 17.2 19.8 87 Hobbs Park 10100 14.4 14.1 102 10.9 13.4 81 Kirwin 9550 10.3 9.6 107 10.8 11.4 95 Little Warm 9370 9.0 10.2 88 8.9 12.7 70 Owl Creek 8975 4.1 5.8 71 5.9 6.0 98 South Pass 9040 13.6 15.2 89 11.0 17.3 64 St. Lawrence Alt 8620 -M 6.9 * -M 8.9 * Togwotee Pass 9580 23.3 22.1 105 24.1 24.0 100 Townsend Creek 8700 9.5 9.7 98 10.6 12.0 88 ----- ----- Basin Index (%) 98 84 BIGHORN BASIN Bald Mtn. 9380 16.4 19.1 86 12.0 16.8 71 Bear Trap Meadow 8200 6.7 4.9 137 6.9 8.5 81 Bone Springs Div 9350 11.9 16.9 70 11.0 15.4 71 Grave Springs 8550 8.0 9.4 85 8.9 10.6 84 Kirwin 9550 10.3 9.6 107 10.8 11.4 95 Marquette 8760 7.2 -M * 8.7 -M * Middle Powder 7760 -M 12.0 * 7.0 11.6 60 Owl Creek 8975 4.1 5.8 71 5.9 6.0 98 Powder River Pass 9480 9.4 10.2 92 10.2 12.5 82 Shell Creek 9580 12.6 15.1 83 10.9 13.6 80 Timber Creek 7950 3.7 4.9 76 5.9 7.3 81 ----- ----- Basin Index (%) 87 79 SHOSHONE RIVER Blackwater 9780 23.1 22.6 102 23.4 20.3 115 Evening Star 9200 24.7 23.8 104 27.5 26.9 102 Marquette 8760 7.2 -M * 8.7 -M * Sylvan Lake 8420 20.8 19.4 107 26.6 21.9 121 Sylvan Road 7120 9.5 10.8 88 15.3 16.5 93 Younts Peak 8350 -M 14.3 * -M 15.6 * ----- ----- Basin Index (%) 102 108 POWDER RIVER Bear Trap Meadow 8200 6.7 4.9 137 6.9 8.5 81 Cloud Peak Reservoir 9860 11.5 14.8 78 10.3 13.2 78 Grave Springs 8550 8.0 9.4 85 8.9 10.6 84 Hansen Sawmill 8360 5.5 6.1 90 7.1 8.5 84 Middle Powder 7760 -M 12.0 * 7.0 11.6 60 Powder River Pass 9480 9.4 10.2 92 10.2 12.5 82 Soldier Park 8720 3.8 -M * 6.5 -M * ----- ----- Basin Index (%) 91 78 TONGUE RIVER Big Goose 7990 7.6 9.6 79 9.4 11.4 82 Bone Springs Div 9350 11.9 16.9 70 11.0 15.4 71 Burgess Junction 7880 8.2 11.9 69 8.3 12.3 67 Dome Lake 8880 -M 11.8 * 7.6 13.5 56 Little Goose 8870 8.9 -M * 7.5 -M * Sucker Creek 8880 10.4 12.1 86 9.5 14.3 66 Tie Creek 6870 3.8 5.6 68 9.6 11.7 82 ----- ----- Basin Index (%) 75 70 BELLE FOURCHE Blind Park 6890 4.9 7.0 70 7.5 11.8 64 Cole Canyon 5910 5.0 5.1 98 10.8 9.5 114 ----- ----- Basin Index (%) 82 86 CHEYENNE RIVER BASIN Blind Park 6890 4.9 7.0 70 7.5 11.8 64 North Rapid Creek 6130 5.3 6.5 82 6.9 9.9 70 ----- ----- Basin Index (%) 76 66 UPPER N. PLATTE Arapaho Ridge 10960 25.1 20.9 120 25.8 22.3 116 Blackhall Mtn 9820 32.8 -M * 33.5 -M * Columbine 9160 28.9 23.4 124 28.7 25.4 113 Divide Peak 8880 21.7 19.9 109 23.8 21.3 112 Joe Wright 10120 22.0 21.2 104 29.9 25.6 117 Laprele Creek 8375 13.3 9.4 141 14.7 12.5 118 Med Bow 10500 37.9 -M * 34.3 -M * Never Summer 10280 22.8 20.3 112 18.9 -M * North French Creek 10130 30.2 29.4 103 30.3 26.6 114 Old Battle 10000 36.7 31.3 117 37.0 34.7 107 Rawah 9020 13.2 10.6 125 17.4 14.2 123 Sage Creek Basin 7850 18.9 11.9 159 16.6 14.6 114 Sand Lake 10050 29.5 28.8 102 24.6 24.6 100 South Brush Creek 8440 10.7 11.9 90 12.4 15.1 82 Tower 10500 51.3 45.8 112 45.3 39.6 114 Webber Springs 9250 26.4 23.1 114 31.4 26.6 118 Whiskey Park 8950 31.2 27.4 114 32.9 27.8 118 Willow Creek Pass 9540 16.3 12.2 134 17.3 13.3 130 Zirkel 9340 34.3 26.3 130 37.3 28.4 131 ----- ----- Basin Index (%) 116 114 SWEETWATER Deer Park 9700 15.7 15.6 101 17.2 19.8 87 Larsen Creek 9000 10.3 11.6 89 14.1 -M * South Pass 9040 13.6 15.2 89 11.0 17.3 64 ----- ----- Basin Index (%) 93 76 LOWER N. PLATTE Casper Mtn. 7900 15.6 14.3 109 12.5 15.0 83 Laprele Creek 8375 13.3 9.4 141 14.7 12.5 118 Reno Hill 8400 17.0 14.0 121 17.5 15.5 113 Windy Peak 7900 10.7 7.7 139 11.7 10.5 111 ----- ----- Basin Index (%) 125 105 LARAMIE RIVER Brooklyn Lake 10240 24.2 21.8 111 25.4 21.0 121 Cinnabar Park 9574 20.4 21.2 96 23.6 24.0 98 Crow Creek 8330 5.8 7.0 83 10.7 10.8 99 Deadman Hill 10220 21.3 16.1 132 20.0 17.2 116 Rawah 9020 13.2 10.6 125 17.4 14.2 123 Roach 9700 17.7 16.6 107 21.8 19.1 114 Windy Peak 7900 10.7 7.7 139 11.7 10.5 111 ----- ----- Basin Index (%) 112 112 S. PLATTE Black Mountain 8920 11.8 -M * 13.0 -M * Crow Creek 8330 5.8 7.0 83 10.7 10.8 99 Deadman Hill 10220 21.3 16.1 132 20.0 17.2 116 ----- ----- Basin Index (%) 117 110 LITTLE SNAKE RIVER Battle Mountain 7440 11.5 9.5 121 16.7 14.9 112 Divide Peak 8880 21.7 19.9 109 23.8 21.3 112 Elk River 8700 19.1 19.2 99 19.5 19.9 98 Little Snake River 8915 29.3 25.2 116 37.9 29.7 128 Old Battle 10000 36.7 31.3 117 37.0 34.7 107 Sage Creek Basin 7850 18.9 11.9 159 16.6 14.6 114 Sandstone RS 8150 16.1 12.8 126 18.9 18.2 104 Whiskey Park 8950 31.2 27.4 114 32.9 27.8 118 ----- ----- Basin Index (%) 117 112 UPPER GREEN RIVER Big Sandy Opening 9080 13.8 12.6 110 14.4 13.1 110 Blind Bull Sum 8650 23.6 23.2 102 18.5 19.3 96 East Rim Divide 7930 10.8 10.2 106 11.5 11.6 99 Elkhart Park G.S. 9400 13.2 12.3 107 13.8 13.2 105 Gros Ventre Summit 8750 8.4 12.9 65 11.6 12.8 91 Gunsight Pass 9820 12.7 13.8 92 15.1 13.7 110 Indian Creek 9425 22.6 24.7 91 18.1 22.3 81 Kendall R.S. 7740 10.3 11.4 90 11.4 14.1 81 Loomis Park 8240 14.9 13.8 108 16.6 17.1 97 New Fork Lake 8340 10.1 10.3 98 9.6 10.7 90 Pocket Creek 9360 14.7 -M * 15.2 -M * Snider Basin 8060 11.1 12.3 90 13.4 14.0 96 Spring Creek Divide 9000 22.9 22.5 102 23.3 23.5 99 Triple Peak 8500 24.0 21.8 110 24.9 25.0 100 ----- ----- Basin Index (%) 98 96 LOWER GREEN RIVER Blacks Fork Jct 8869 8.4 -M * 12.4 -M * Buck Pasture 9632 14.7 -M * 18.2 -M * EF Blacks Fork GS 9360 11.3 -M * 10.4 -M * Hams Fork 7840 10.1 10.6 95 11.6 11.3 103 Hewinta 9500 11.4 10.9 105 14.0 14.0 100 Hickerson Park 9122 8.9 7.9 113 10.9 10.2 107 Hole-in-Rock 9168 6.4 7.0 91 10.0 9.7 103 Indian Creek 9425 22.6 24.7 91 18.1 22.3 81 Kelley R.S. 8180 15.2 14.7 103 15.8 17.9 88 Spirit Lk 10235 15.8 -M * 16.2 -M * Steel Creek Park 10158 15.4 15.8 97 17.4 16.4 106 ----- ----- Basin Index (%) 98 96 UPPER BEAR RIVER Bear River RS 8777 10.1 -M * 14.5 -M * Bug Lake 7987 23.6 18.4 128 23.4 19.2 122 Burts Miller Ranch 8000 5.5 -M * 8.3 -M * Chalk Creek #1 9171 25.1 24.4 103 29.1 25.0 116 Hayden Fork 9130 15.5 15.4 101 22.5 21.0 107 Kelley R.S. 8180 15.2 14.7 103 15.8 17.9 88 Lily Lake 9133 12.2 12.6 97 15.7 17.0 92 Monte Cristo 8932 33.6 27.7 121 31.3 25.7 122 Salt River Summit 7640 13.5 12.8 105 15.9 16.5 96 Spring Creek Divide 9000 22.9 22.5 102 23.3 23.5 99 ----- ----- Basin Index (%) 109 107 ----------------------------------------------------------------------------- -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.