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 WEDNESDAY: APRIL 17 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 18.8 12.5 150 23.8 21.5 111 Black Bear 8170 47.1 36.8 128 48.0 39.3 122 Blind Bull Sum 8650 26.2 23.9 110 20.6 20.0 103 Cottonwood Creek 7670 23.2 19.3 120 28.6 25.3 113 East Rim Divide 7930 10.9 9.7 112 13.0 12.1 107 Grand Targhee 9260 48.1 41.5 116 33.7 32.3 104 Granite Creek 6770 18.4 11.7 157 22.8 20.1 113 Grassy Lake 7265 35.9 31.6 114 41.0 36.9 111 Gros Ventre Summit 8750 8.0 13.1 61 13.4 13.5 99 Gunsight Pass 9820 14.5 13.4 108 16.9 14.6 116 Lewis Lake Divide 7850 39.9 30.2 132 42.2 36.4 116 Phillips Bench 8200 32.0 25.9 124 34.8 28.8 121 Salt River Summit 7640 15.4 10.6 145 18.3 17.1 107 Snake River Station 6920 19.1 12.1 158 27.4 23.2 118 Spring Creek Divide 9000 25.0 23.4 107 25.6 24.4 105 Thumb Divide 7980 20.7 14.4 144 20.9 19.3 108 Togwotee Pass 9580 26.2 23.3 112 27.1 25.2 108 Two Ocean Plateau 9240 34.2 27.6 124 28.4 28.1 101 Willow Creek 8080 34.9 26.7 131 38.8 34.7 112 Younts Peak 8350 -M 14.9 * -M 16.4 * ----- ----- Basin Index (%) 122 111 MADISON-GALLATIN Black Bear 8170 47.1 36.8 128 48.0 39.3 122 Canyon 7870 15.0 12.4 121 17.9 16.8 107 Madison Plateau 7750 32.6 22.7 144 30.9 27.1 114 West Yellowstone 6700 11.2 8.1 138 18.6 14.7 127 Whiskey Creek 6800 19.9 14.9 134 23.4 20.9 112 ----- ----- Basin Index (%) 133 117 YELLOWSTONE Beartooth Lake 9360 23.4 22.8 103 21.6 20.4 106 Burnt Mtn 5880 6.8 .0 * 14.9 13.7 109 Canyon 7870 15.0 12.4 121 17.9 16.8 107 Cole Creek 7850 18.5 15.9 116 -M 14.2 * Evening Star 9200 28.4 25.0 114 31.4 28.3 111 Fisher Creek 9100 36.6 32.1 114 38.7 32.9 118 Northeast Entrance 7350 9.6 7.6 126 15.8 12.7 124 Parker Peak 9400 26.6 20.7 129 26.2 18.4 142 Sylvan Lake 8420 23.0 20.2 114 29.7 23.2 128 Thumb Divide 7980 20.7 14.4 144 20.9 19.3 108 Two Ocean Plateau 9240 34.2 27.6 124 28.4 28.1 101 White Mill 8700 27.2 23.6 115 22.9 24.6 93 Wolverine 7650 10.2 8.1 126 13.7 12.6 109 Younts Peak 8350 -M 14.9 * -M 16.4 * ----- ----- Basin Index (%) 122 112 WIND RIVER Burroughs Creek 8750 13.5 -M * 15.0 -M * Castle Creek 8400 3.8 -M * 7.0 -M * Cold Springs 9630 7.9 5.4 146 8.7 10.6 82 Deer Park 9700 18.4 16.0 115 20.1 21.0 96 Hobbs Park 10100 17.4 14.8 118 14.0 14.4 97 Kirwin 9550 11.4 10.0 114 12.2 12.2 100 Little Warm 9370 10.7 10.2 105 10.2 13.6 75 Owl Creek 8975 4.4 4.7 94 7.2 6.6 109 South Pass 9040 16.5 15.7 105 13.6 18.2 75 St. Lawrence Alt 8620 -M 6.0 * -M 9.6 * Togwotee Pass 9580 26.2 23.3 112 27.1 25.2 108 Townsend Creek 8700 11.1 9.8 113 12.7 12.9 98 ----- ----- Basin Index (%) 113 93 BIGHORN BASIN Bald Mtn. 9380 17.2 19.5 88 13.1 17.9 73 Bear Trap Meadow 8200 5.0 4.0 125 7.4 9.2 80 Bone Springs Div 9350 13.0 16.4 79 12.2 16.4 74 Grave Springs 8550 8.6 9.6 90 9.9 11.3 88 Kirwin 9550 11.4 10.0 114 12.2 12.2 100 Marquette 8760 8.2 -M * 10.0 -M * Middle Powder 7760 8.5 12.5 68 9.2 12.5 74 Owl Creek 8975 4.4 4.7 94 7.2 6.6 109 Powder River Pass 9480 10.0 10.1 99 -M 13.4 * Shell Creek 9580 13.6 15.3 89 11.1 14.5 77 Timber Creek 7950 3.1 5.1 61 7.1 8.1 88 ----- ----- Basin Index (%) 88 82 SHOSHONE RIVER Blackwater 9780 27.1 23.7 114 27.2 21.5 127 Evening Star 9200 28.4 25.0 114 31.4 28.3 111 Marquette 8760 8.2 -M * 10.0 -M * Sylvan Lake 8420 23.0 20.2 114 29.7 23.2 128 Sylvan Road 7120 9.4 10.2 92 17.3 17.2 101 Younts Peak 8350 -M 14.9 * -M 16.4 * ----- ----- Basin Index (%) 111 117 POWDER RIVER Bear Trap Meadow 8200 5.0 4.0 125 7.4 9.2 80 Cloud Peak Reservoir 9860 12.2 15.5 79 11.6 14.4 81 Grave Springs 8550 8.6 9.6 90 9.9 11.3 88 Hansen Sawmill 8360 5.9 5.4 109 8.4 9.3 90 Middle Powder 7760 8.5 12.5 68 9.2 12.5 74 Powder River Pass 9480 10.0 10.1 99 -M 13.4 * Soldier Park 8720 3.7 -M * 7.6 -M * ----- ----- Basin Index (%) 88 82 TONGUE RIVER Big Goose 7990 8.5 9.6 89 10.7 12.2 88 Bone Springs Div 9350 13.0 16.4 79 12.2 16.4 74 Burgess Junction 7880 9.0 12.2 74 9.0 13.1 69 Dome Lake 8880 8.0 11.9 67 8.9 14.5 61 Little Goose 8870 9.8 -M * 8.4 -M * Sucker Creek 8880 11.1 12.7 87 10.3 15.4 67 Tie Creek 6870 3.9 4.5 87 11.2 12.4 90 ----- ----- Basin Index (%) 79 74 BELLE FOURCHE Blind Park 6890 2.6 4.6 57 8.0 12.5 64 Cole Canyon 5910 4.8 2.6 185 13.1 10.1 130 ----- ----- Basin Index (%) 103 93 CHEYENNE RIVER BASIN Blind Park 6890 2.6 4.6 57 8.0 12.5 64 North Rapid Creek 6130 3.8 4.8 79 7.7 10.5 73 ----- ----- Basin Index (%) 68 68 UPPER N. PLATTE Arapaho Ridge 10960 26.5 21.5 123 27.1 23.9 113 Blackhall Mtn 9820 34.6 -M * 35.4 -M * Columbine 9160 27.1 21.2 128 29.9 26.6 112 Divide Peak 8880 22.3 19.6 114 24.7 22.4 110 Joe Wright 10120 23.3 22.1 105 31.1 27.2 114 Laprele Creek 8375 12.9 8.8 147 15.2 13.3 114 Med Bow 10500 39.9 -M * 36.0 -M * Never Summer 10280 22.8 20.6 111 19.9 -M * North French Creek 10130 30.5 32.0 95 31.4 28.0 112 Old Battle 10000 38.4 32.3 119 38.2 36.4 105 Rawah 9020 12.2 9.2 133 18.1 15.3 118 Sage Creek Basin 7850 17.8 7.6 234 17.0 15.0 113 Sand Lake 10050 30.9 30.4 102 25.6 26.2 98 South Brush Creek 8440 9.2 10.3 89 12.8 16.1 80 Tower 10500 52.8 47.5 111 48.4 41.4 117 Webber Springs 9250 26.9 22.8 118 32.9 27.9 118 Whiskey Park 8950 31.8 26.5 120 33.9 29.1 116 Willow Creek Pass 9540 16.9 12.7 133 18.3 14.1 130 Zirkel 9340 34.1 23.2 147 39.5 29.5 134 ----- ----- Basin Index (%) 118 113 SWEETWATER Deer Park 9700 18.4 16.0 115 20.1 21.0 96 Larsen Creek 9000 10.2 10.6 96 15.4 -M * South Pass 9040 16.5 15.7 105 13.6 18.2 75 ----- ----- Basin Index (%) 107 86 LOWER N. PLATTE Casper Mtn. 7900 15.4 14.4 107 13.3 16.1 83 Laprele Creek 8375 12.9 8.8 147 15.2 13.3 114 Reno Hill 8400 17.2 14.1 122 18.3 16.6 110 Windy Peak 7900 9.8 7.1 138 12.3 11.3 109 ----- ----- Basin Index (%) 125 103 LARAMIE RIVER Brooklyn Lake 10240 25.3 22.1 114 26.9 22.3 121 Cinnabar Park 9574 20.7 20.7 100 24.5 25.0 98 Crow Creek 8330 4.5 2.3 196 11.4 11.7 97 Deadman Hill 10220 22.5 16.5 136 21.0 18.4 114 Rawah 9020 12.2 9.2 133 18.1 15.3 118 Roach 9700 17.8 16.5 108 22.8 20.2 113 Windy Peak 7900 9.8 7.1 138 12.3 11.3 109 ----- ----- Basin Index (%) 119 110 S. PLATTE Black Mountain 8920 12.3 -M * 14.4 -M * Crow Creek 8330 4.5 2.3 196 11.4 11.7 97 Deadman Hill 10220 22.5 16.5 136 21.0 18.4 114 ----- ----- Basin Index (%) 144 108 LITTLE SNAKE RIVER Battle Mountain 7440 8.7 5.8 150 17.2 15.7 110 Divide Peak 8880 22.3 19.6 114 24.7 22.4 110 Elk River 8700 18.1 16.5 110 20.5 20.9 98 Little Snake River 8915 29.1 25.3 115 39.3 30.9 127 Old Battle 10000 38.4 32.3 119 38.2 36.4 105 Sage Creek Basin 7850 17.8 7.6 234 17.0 15.0 113 Sandstone RS 8150 13.9 11.1 125 19.2 19.1 101 Whiskey Park 8950 31.8 26.5 120 33.9 29.1 116 ----- ----- Basin Index (%) 124 111 UPPER GREEN RIVER Big Sandy Opening 9080 14.9 12.8 116 15.7 13.8 114 Blind Bull Sum 8650 26.2 23.9 110 20.6 20.0 103 East Rim Divide 7930 10.9 9.7 112 13.0 12.1 107 Elkhart Park G.S. 9400 14.3 12.0 119 14.9 13.8 108 Gros Ventre Summit 8750 8.0 13.1 61 13.4 13.5 99 Gunsight Pass 9820 14.5 13.4 108 16.9 14.6 116 Indian Creek 9425 25.0 23.5 106 19.8 23.2 85 Kendall R.S. 7740 10.5 9.3 113 12.6 14.6 86 Loomis Park 8240 16.7 13.3 126 18.4 17.7 104 New Fork Lake 8340 10.4 9.3 112 10.3 11.1 93 Pocket Creek 9360 15.9 -M * 16.4 -M * Snider Basin 8060 10.6 11.3 94 14.2 14.6 97 Spring Creek Divide 9000 25.0 23.4 107 25.6 24.4 105 Triple Peak 8500 26.2 19.3 136 27.5 26.0 106 ----- ----- Basin Index (%) 110 102 LOWER GREEN RIVER Blacks Fork Jct 8869 9.8 -M * 14.6 -M * Buck Pasture 9632 17.1 -M * 21.6 -M * EF Blacks Fork GS 9360 13.5 -M * 13.3 -M * Hams Fork 7840 9.6 7.8 123 12.3 11.8 104 Hewinta 9500 13.3 9.1 146 16.9 14.6 116 Hickerson Park 9122 10.5 6.1 172 13.1 10.8 121 Hole-in-Rock 9168 7.8 6.4 122 12.1 10.3 117 Indian Creek 9425 25.0 23.5 106 19.8 23.2 85 Kelley R.S. 8180 16.1 13.4 120 17.4 18.6 94 Spirit Lk 10235 18.0 -M * 19.0 -M * Steel Creek Park 10158 14.7 16.1 91 21.0 17.4 121 ----- ----- Basin Index (%) 118 106 UPPER BEAR RIVER Bear River RS 8777 10.9 -M * 17.0 -M * Bug Lake 7987 24.7 18.4 134 25.5 20.0 128 Burts Miller Ranch 8000 5.5 -M * 10.0 -M * Chalk Creek #1 9171 29.3 24.9 118 32.5 26.3 124 Hayden Fork 9130 17.4 13.0 134 25.5 22.0 116 Kelley R.S. 8180 16.1 13.4 120 17.4 18.6 94 Lily Lake 9133 15.0 11.7 128 18.3 17.9 102 Monte Cristo 8932 37.6 27.6 136 34.5 26.9 128 Salt River Summit 7640 15.4 10.6 145 18.3 17.1 107 Spring Creek Divide 9000 25.0 23.4 107 25.6 24.4 105 ----- ----- Basin Index (%) 126 114 ----------------------------------------------------------------------------- -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.