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 14 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 17.7 13.5 131 22.5 21.2 106 Black Bear 8170 43.9 36.5 120 45.7 38.8 118 Blind Bull Sum 8650 24.6 23.8 103 19.2 19.7 97 Cottonwood Creek 7670 21.6 20.1 107 26.7 25.1 106 East Rim Divide 7930 10.3 10.0 103 12.1 11.9 102 Grand Targhee 9260 45.8 40.7 113 32.5 31.7 103 Granite Creek 6770 17.0 12.7 134 21.1 19.8 107 Grassy Lake 7265 33.5 31.4 107 38.5 36.5 105 Gros Ventre Summit 8750 8.1 12.9 63 12.8 13.2 97 Gunsight Pass 9820 13.7 13.5 101 16.2 14.2 114 Lewis Lake Divide 7850 37.2 30.2 123 39.7 35.9 111 Phillips Bench 8200 29.8 26.0 115 33.1 28.5 116 Salt River Summit 7640 14.1 11.5 123 17.0 17.0 100 Snake River Station 6920 18.1 13.2 137 26.2 22.8 115 Spring Creek Divide 9000 23.4 23.1 101 24.0 24.2 99 Thumb Divide 7980 19.6 14.5 135 19.9 18.9 105 Togwotee Pass 9580 25.1 22.9 110 26.0 24.8 105 Two Ocean Plateau 9240 32.4 27.0 120 27.1 27.7 98 Willow Creek 8080 32.5 26.9 121 36.4 34.3 106 Younts Peak 8350 -M 14.7 * -M 16.1 * ----- ----- Basin Index (%) 114 107 MADISON-GALLATIN Black Bear 8170 43.9 36.5 120 45.7 38.8 118 Canyon 7870 14.2 12.3 115 17.0 16.5 103 Madison Plateau 7750 31.1 22.4 139 29.4 26.7 110 West Yellowstone 6700 11.0 8.4 131 18.1 14.3 127 Whiskey Creek 6800 18.9 14.7 129 22.1 20.6 107 ----- ----- Basin Index (%) 126 113 YELLOWSTONE Beartooth Lake 9360 22.1 22.2 100 20.4 20.2 101 Burnt Mtn 5880 6.9 1.0 690 14.6 13.4 109 Canyon 7870 14.2 12.3 115 17.0 16.5 103 Cole Creek 7850 17.6 15.5 114 -M 13.8 * Evening Star 9200 27.3 24.6 111 29.8 27.9 107 Fisher Creek 9100 34.4 31.8 108 36.9 32.4 114 Northeast Entrance 7350 9.1 8.2 111 15.1 12.6 120 Parker Peak 9400 25.0 20.4 123 25.0 18.1 138 Sylvan Lake 8420 21.7 19.9 109 28.3 22.8 124 Thumb Divide 7980 19.6 14.5 135 19.9 18.9 105 Two Ocean Plateau 9240 32.4 27.0 120 27.1 27.7 98 White Mill 8700 25.3 23.4 108 21.5 24.2 89 Wolverine 7650 9.9 8.9 111 13.2 12.5 106 Younts Peak 8350 -M 14.7 * -M 16.1 * ----- ----- Basin Index (%) 116 109 WIND RIVER Burroughs Creek 8750 12.6 -M * 14.1 -M * Castle Creek 8400 3.8 -M * 6.6 -M * Cold Springs 9630 7.7 5.9 131 8.5 10.3 83 Deer Park 9700 17.0 16.1 106 18.9 20.6 92 Hobbs Park 10100 16.9 14.9 113 13.6 14.1 96 Kirwin 9550 11.0 9.9 111 11.8 11.9 99 Little Warm 9370 10.0 10.3 97 9.5 13.3 71 Owl Creek 8975 4.9 5.3 92 7.1 6.3 113 South Pass 9040 15.4 15.8 97 12.9 18.0 72 St. Lawrence Alt 8620 -M 6.6 * -M 9.4 * Togwotee Pass 9580 25.1 22.9 110 26.0 24.8 105 Townsend Creek 8700 11.5 10.0 115 12.6 12.7 99 ----- ----- Basin Index (%) 108 92 BIGHORN BASIN Bald Mtn. 9380 17.0 19.4 88 12.8 17.6 73 Bear Trap Meadow 8200 5.6 4.5 124 7.2 9.0 80 Bone Springs Div 9350 12.4 16.9 73 11.7 16.1 73 Grave Springs 8550 8.5 9.6 89 9.8 11.1 88 Kirwin 9550 11.0 9.9 111 11.8 11.9 99 Marquette 8760 8.1 -M * 9.9 -M * Middle Powder 7760 8.3 12.4 67 8.4 12.3 68 Owl Creek 8975 4.9 5.3 92 7.1 6.3 113 Powder River Pass 9480 9.9 10.2 97 -M 13.1 * Shell Creek 9580 13.4 15.6 86 10.9 14.3 76 Timber Creek 7950 3.3 5.2 63 6.9 7.8 88 ----- ----- Basin Index (%) 87 81 SHOSHONE RIVER Blackwater 9780 25.7 23.6 109 25.9 21.2 122 Evening Star 9200 27.3 24.6 111 29.8 27.9 107 Marquette 8760 8.1 -M * 9.9 -M * Sylvan Lake 8420 21.7 19.9 109 28.3 22.8 124 Sylvan Road 7120 8.6 10.3 83 16.4 17.0 96 Younts Peak 8350 -M 14.7 * -M 16.1 * ----- ----- Basin Index (%) 106 113 POWDER RIVER Bear Trap Meadow 8200 5.6 4.5 124 7.2 9.0 80 Cloud Peak Reservoir 9860 12.0 15.4 78 11.3 14.0 81 Grave Springs 8550 8.5 9.6 89 9.8 11.1 88 Hansen Sawmill 8360 5.9 6.0 98 8.3 9.0 92 Middle Powder 7760 8.3 12.4 67 8.4 12.3 68 Powder River Pass 9480 9.9 10.2 97 -M 13.1 * Soldier Park 8720 3.5 -M * 7.3 -M * ----- ----- Basin Index (%) 86 81 TONGUE RIVER Big Goose 7990 8.2 9.8 84 10.4 12.1 86 Bone Springs Div 9350 12.4 16.9 73 11.7 16.1 73 Burgess Junction 7880 8.9 12.2 73 8.8 12.9 68 Dome Lake 8880 7.8 12.0 65 8.6 14.3 60 Little Goose 8870 9.5 -M * 8.1 -M * Sucker Creek 8880 10.8 12.6 86 10.0 15.1 66 Tie Creek 6870 4.0 5.0 80 11.0 12.2 90 ----- ----- Basin Index (%) 76 73 BELLE FOURCHE Blind Park 6890 3.9 5.5 71 7.9 12.4 64 Cole Canyon 5910 5.5 3.5 157 12.9 9.9 130 ----- ----- Basin Index (%) 104 93 CHEYENNE RIVER BASIN Blind Park 6890 3.9 5.5 71 7.9 12.4 64 North Rapid Creek 6130 4.7 5.7 82 7.6 10.3 74 ----- ----- Basin Index (%) 77 68 UPPER N. PLATTE Arapaho Ridge 10960 26.4 21.6 122 27.0 23.7 114 Blackhall Mtn 9820 33.6 -M * 34.6 -M * Columbine 9160 27.3 22.2 123 29.5 26.2 113 Divide Peak 8880 22.0 20.2 109 24.2 22.2 109 Joe Wright 10120 23.3 22.0 106 31.0 26.8 116 Laprele Creek 8375 13.3 9.2 145 14.9 13.1 114 Med Bow 10500 37.9 -M * 35.1 -M * Never Summer 10280 23.0 20.6 112 19.8 -M * North French Creek 10130 30.0 31.5 95 30.9 27.6 112 Old Battle 10000 37.2 32.2 116 37.2 36.0 103 Rawah 9020 12.8 9.8 131 18.0 15.0 120 Sage Creek Basin 7850 18.7 9.4 199 16.6 15.0 111 Sand Lake 10050 30.1 30.2 100 25.0 25.8 97 South Brush Creek 8440 9.5 11.2 85 12.5 15.9 79 Tower 10500 52.9 47.4 112 45.5 41.0 111 Webber Springs 9250 26.6 23.5 113 31.8 27.6 115 Whiskey Park 8950 31.6 27.2 116 33.3 28.7 116 Willow Creek Pass 9540 16.9 12.6 134 18.3 14.0 131 Zirkel 9340 33.4 24.3 137 38.6 29.2 132 ----- ----- Basin Index (%) 116 112 SWEETWATER Deer Park 9700 17.0 16.1 106 18.9 20.6 92 Larsen Creek 9000 9.4 10.9 86 14.6 -M * South Pass 9040 15.4 15.8 97 12.9 18.0 72 ----- ----- Basin Index (%) 98 82 LOWER N. PLATTE Casper Mtn. 7900 16.3 14.5 112 13.2 15.9 83 Laprele Creek 8375 13.3 9.2 145 14.9 13.1 114 Reno Hill 8400 17.3 14.2 122 18.0 16.4 110 Windy Peak 7900 10.5 7.5 140 12.0 11.1 108 ----- ----- Basin Index (%) 126 103 LARAMIE RIVER Brooklyn Lake 10240 24.5 22.3 110 26.1 21.9 119 Cinnabar Park 9574 21.0 21.2 99 24.1 24.9 97 Crow Creek 8330 5.2 4.8 108 11.4 11.4 100 Deadman Hill 10220 22.3 16.6 134 20.9 18.1 115 Rawah 9020 12.8 9.8 131 18.0 15.0 120 Roach 9700 18.2 16.5 110 22.4 19.9 113 Windy Peak 7900 10.5 7.5 140 12.0 11.1 108 ----- ----- Basin Index (%) 116 110 S. PLATTE Black Mountain 8920 12.8 -M * 14.3 -M * Crow Creek 8330 5.2 4.8 108 11.4 11.4 100 Deadman Hill 10220 22.3 16.6 134 20.9 18.1 115 ----- ----- Basin Index (%) 129 109 LITTLE SNAKE RIVER Battle Mountain 7440 10.3 7.2 143 17.1 15.5 110 Divide Peak 8880 22.0 20.2 109 24.2 22.2 109 Elk River 8700 18.8 17.5 107 20.5 20.7 99 Little Snake River 8915 28.7 25.9 111 38.3 30.7 125 Old Battle 10000 37.2 32.2 116 37.2 36.0 103 Sage Creek Basin 7850 18.7 9.4 199 16.6 15.0 111 Sandstone RS 8150 15.1 12.1 125 19.0 18.9 101 Whiskey Park 8950 31.6 27.2 116 33.3 28.7 116 ----- ----- Basin Index (%) 120 110 UPPER GREEN RIVER Big Sandy Opening 9080 14.1 12.9 109 14.8 13.6 109 Blind Bull Sum 8650 24.6 23.8 103 19.2 19.7 97 East Rim Divide 7930 10.3 10.0 103 12.1 11.9 102 Elkhart Park G.S. 9400 13.7 12.1 113 14.2 13.6 104 Gros Ventre Summit 8750 8.1 12.9 63 12.8 13.2 97 Gunsight Pass 9820 13.7 13.5 101 16.2 14.2 114 Indian Creek 9425 23.7 24.1 98 18.8 23.0 82 Kendall R.S. 7740 9.7 10.1 96 11.7 14.4 81 Loomis Park 8240 15.3 13.7 112 17.1 17.5 98 New Fork Lake 8340 10.0 9.7 103 9.9 10.9 91 Pocket Creek 9360 14.8 -M * 15.4 -M * Snider Basin 8060 10.5 11.8 89 13.5 14.4 94 Spring Creek Divide 9000 23.4 23.1 101 24.0 24.2 99 Triple Peak 8500 24.5 20.0 122 25.9 25.6 101 ----- ----- Basin Index (%) 102 97 LOWER GREEN RIVER Blacks Fork Jct 8869 10.0 -M * 14.4 -M * Buck Pasture 9632 16.6 -M * 21.1 -M * EF Blacks Fork GS 9360 13.4 -M * 13.0 -M * Hams Fork 7840 9.5 8.9 107 11.9 11.6 103 Hewinta 9500 13.1 10.0 131 16.6 14.5 114 Hickerson Park 9122 10.4 6.9 151 12.8 10.7 120 Hole-in-Rock 9168 7.8 7.0 111 11.8 10.1 117 Indian Creek 9425 23.7 24.1 98 18.8 23.0 82 Kelley R.S. 8180 15.2 13.9 109 16.4 18.4 89 Spirit Lk 10235 17.7 -M * 18.5 -M * Steel Creek Park 10158 17.5 16.1 109 20.6 17.2 120 ----- ----- Basin Index (%) 112 103 UPPER BEAR RIVER Bear River RS 8777 11.0 -M * 16.8 -M * Bug Lake 7987 23.8 19.2 124 24.1 19.9 121 Burts Miller Ranch 8000 6.2 -M * 9.7 -M * Chalk Creek #1 9171 28.2 24.8 114 31.7 26.0 122 Hayden Fork 9130 17.2 14.2 121 25.0 21.7 115 Kelley R.S. 8180 15.2 13.9 109 16.4 18.4 89 Lily Lake 9133 14.5 12.6 115 17.8 17.7 101 Monte Cristo 8932 35.1 27.8 126 32.7 26.7 122 Salt River Summit 7640 14.1 11.5 123 17.0 17.0 100 Spring Creek Divide 9000 23.4 23.1 101 24.0 24.2 99 ----- ----- Basin Index (%) 117 110 ----------------------------------------------------------------------------- -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.