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 THURSDAY: APRIL 18 , 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 12.2 154 23.8 21.6 110 Black Bear 8170 47.2 36.8 128 48.0 39.5 122 Blind Bull Sum 8650 26.1 23.9 109 20.7 20.1 103 Cottonwood Creek 7670 23.1 19.1 121 28.6 25.5 112 East Rim Divide 7930 10.7 9.6 111 13.0 12.1 107 Grand Targhee 9260 48.1 41.7 115 33.9 32.3 105 Granite Creek 6770 18.1 11.4 159 22.8 20.2 113 Grassy Lake 7265 35.8 31.5 114 41.1 37.1 111 Gros Ventre Summit 8750 7.9 13.2 60 13.4 13.5 99 Gunsight Pass 9820 13.7 13.5 101 16.9 14.6 116 Lewis Lake Divide 7850 39.9 30.2 132 42.2 36.5 116 Phillips Bench 8200 32.0 25.8 124 34.8 28.9 120 Salt River Summit 7640 15.3 10.3 149 18.3 17.2 106 Snake River Station 6920 19.1 11.7 163 27.4 23.3 118 Spring Creek Divide 9000 25.0 23.5 106 25.6 24.6 104 Thumb Divide 7980 20.7 14.5 143 20.9 19.5 107 Togwotee Pass 9580 26.2 23.5 111 27.2 25.4 107 Two Ocean Plateau 9240 34.2 27.8 123 28.4 28.2 101 Willow Creek 8080 34.8 26.8 130 38.9 34.9 111 Younts Peak 8350 -M 15.0 * -M 16.4 * ----- ----- Basin Index (%) 122 111 MADISON-GALLATIN Black Bear 8170 47.2 36.8 128 48.0 39.5 122 Canyon 7870 14.8 12.4 119 17.9 16.8 107 Madison Plateau 7750 32.5 22.8 143 30.9 27.2 114 West Yellowstone 6700 10.8 8.0 135 18.6 14.9 125 Whiskey Creek 6800 19.8 15.1 131 23.5 21.0 112 ----- ----- Basin Index (%) 132 116 YELLOWSTONE Beartooth Lake 9360 23.5 23.0 102 21.7 20.5 106 Burnt Mtn 5880 6.7 .0 * 15.0 13.9 108 Canyon 7870 14.8 12.4 119 17.9 16.8 107 Cole Creek 7850 18.5 16.0 116 -M 14.2 * Evening Star 9200 28.6 25.0 114 31.5 28.4 111 Fisher Creek 9100 36.7 32.2 114 38.7 33.0 117 Northeast Entrance 7350 9.7 7.3 133 15.8 12.8 123 Parker Peak 9400 26.6 20.8 128 26.2 18.5 142 Sylvan Lake 8420 23.1 20.3 114 29.7 23.3 127 Thumb Divide 7980 20.7 14.5 143 20.9 19.5 107 Two Ocean Plateau 9240 34.2 27.8 123 28.4 28.2 101 White Mill 8700 27.2 23.6 115 23.0 24.7 93 Wolverine 7650 10.1 7.8 129 13.8 12.7 109 Younts Peak 8350 -M 15.0 * -M 16.4 * ----- ----- Basin Index (%) 122 112 WIND RIVER Burroughs Creek 8750 13.3 -M * 15.1 -M * Castle Creek 8400 3.4 -M * 7.0 -M * Cold Springs 9630 7.9 5.1 155 8.7 10.7 81 Deer Park 9700 18.4 16.1 114 20.2 21.1 96 Hobbs Park 10100 17.4 14.8 118 14.0 14.5 97 Kirwin 9550 11.4 10.0 114 12.1 12.2 99 Little Warm 9370 10.6 10.2 104 10.2 13.7 74 Owl Creek 8975 4.4 4.4 100 7.2 6.6 109 South Pass 9040 16.3 15.7 104 13.7 18.3 75 St. Lawrence Alt 8620 -M 5.7 * -M 9.7 * Togwotee Pass 9580 26.2 23.5 111 27.2 25.4 107 Townsend Creek 8700 11.0 9.7 113 12.7 13.0 98 ----- ----- Basin Index (%) 113 93 BIGHORN BASIN Bald Mtn. 9380 17.4 19.6 89 13.1 17.9 73 Bear Trap Meadow 8200 4.8 3.8 126 7.3 9.2 79 Bone Springs Div 9350 13.0 16.3 80 12.2 16.5 74 Grave Springs 8550 8.5 9.7 88 9.9 11.3 88 Kirwin 9550 11.4 10.0 114 12.1 12.2 99 Marquette 8760 8.1 -M * 10.0 -M * Middle Powder 7760 8.3 12.5 66 9.2 12.5 74 Owl Creek 8975 4.4 4.4 100 7.2 6.6 109 Powder River Pass 9480 10.0 10.1 99 -M 13.5 * Shell Creek 9580 13.7 15.3 90 11.1 14.6 76 Timber Creek 7950 3.1 5.1 61 7.1 8.2 87 ----- ----- Basin Index (%) 89 82 SHOSHONE RIVER Blackwater 9780 27.1 23.8 114 27.2 21.6 126 Evening Star 9200 28.6 25.0 114 31.5 28.4 111 Marquette 8760 8.1 -M * 10.0 -M * Sylvan Lake 8420 23.1 20.3 114 29.7 23.3 127 Sylvan Road 7120 9.4 10.2 92 17.4 17.4 100 Younts Peak 8350 -M 15.0 * -M 16.4 * ----- ----- Basin Index (%) 111 117 POWDER RIVER Bear Trap Meadow 8200 4.8 3.8 126 7.3 9.2 79 Cloud Peak Reservoir 9860 12.3 15.6 79 11.6 14.5 80 Grave Springs 8550 8.5 9.7 88 9.9 11.3 88 Hansen Sawmill 8360 5.8 5.2 112 8.4 9.3 90 Middle Powder 7760 8.3 12.5 66 9.2 12.5 74 Powder River Pass 9480 10.0 10.1 99 -M 13.5 * Soldier Park 8720 3.7 -M * 7.6 -M * ----- ----- Basin Index (%) 87 82 TONGUE RIVER Big Goose 7990 8.5 9.5 89 10.7 12.3 87 Bone Springs Div 9350 13.0 16.3 80 12.2 16.5 74 Burgess Junction 7880 9.1 12.3 74 9.0 13.2 68 Dome Lake 8880 8.0 11.9 67 8.9 14.6 61 Little Goose 8870 9.8 -M * 8.4 -M * Sucker Creek 8880 11.1 12.7 87 10.3 15.5 66 Tie Creek 6870 3.9 4.5 87 11.2 12.6 89 ----- ----- Basin Index (%) 80 74 BELLE FOURCHE Blind Park 6890 2.1 4.4 48 8.1 12.6 64 Cole Canyon 5910 4.4 2.4 183 13.0 10.1 129 ----- ----- Basin Index (%) 96 93 CHEYENNE RIVER BASIN Blind Park 6890 2.1 4.4 48 8.1 12.6 64 North Rapid Creek 6130 3.5 4.6 76 7.7 10.5 73 ----- ----- Basin Index (%) 62 68 UPPER N. PLATTE Arapaho Ridge 10960 26.5 21.4 124 27.2 24.0 113 Blackhall Mtn 9820 34.6 -M * 35.4 -M * Columbine 9160 26.6 21.0 127 30.0 26.6 113 Divide Peak 8880 21.8 19.3 113 24.7 22.5 110 Joe Wright 10120 23.4 22.1 106 31.2 27.4 114 Laprele Creek 8375 12.7 8.6 148 15.3 13.4 114 Med Bow 10500 40.2 -M * 36.4 -M * Never Summer 10280 22.9 20.6 111 19.9 -M * North French Creek 10130 30.7 32.0 96 31.6 28.1 112 Old Battle 10000 38.4 32.4 119 38.4 36.6 105 Rawah 9020 11.9 8.9 134 18.2 15.5 117 Sage Creek Basin 7850 17.2 7.1 242 17.0 15.1 113 Sand Lake 10050 31.2 30.4 103 25.8 26.4 98 South Brush Creek 8440 9.0 10.1 89 12.8 16.2 79 Tower 10500 52.3 47.7 110 48.5 41.6 117 Webber Springs 9250 26.7 22.6 118 32.8 28.1 117 Whiskey Park 8950 31.7 26.2 121 34.0 29.3 116 Willow Creek Pass 9540 16.9 12.8 132 18.4 14.2 130 Zirkel 9340 34.0 23.0 148 39.5 29.5 134 ----- ----- Basin Index (%) 118 113 SWEETWATER Deer Park 9700 18.4 16.1 114 20.2 21.1 96 Larsen Creek 9000 10.0 10.5 95 15.4 -M * South Pass 9040 16.3 15.7 104 13.7 18.3 75 ----- ----- Basin Index (%) 106 86 LOWER N. PLATTE Casper Mtn. 7900 15.5 14.5 107 13.5 16.2 83 Laprele Creek 8375 12.7 8.6 148 15.3 13.4 114 Reno Hill 8400 17.4 14.0 124 18.6 16.8 111 Windy Peak 7900 9.4 6.9 136 12.2 11.4 107 ----- ----- Basin Index (%) 125 103 LARAMIE RIVER Brooklyn Lake 10240 25.4 22.1 115 27.0 22.4 121 Cinnabar Park 9574 20.8 20.5 101 24.6 25.2 98 Crow Creek 8330 4.0 1.7 235 11.4 11.9 96 Deadman Hill 10220 22.6 16.6 136 21.1 18.6 113 Rawah 9020 11.9 8.9 134 18.2 15.5 117 Roach 9700 17.7 16.5 107 22.8 20.3 112 Windy Peak 7900 9.4 6.9 136 12.2 11.4 107 ----- ----- Basin Index (%) 120 110 S. PLATTE Black Mountain 8920 12.3 -M * 14.4 -M * Crow Creek 8330 4.0 1.7 235 11.4 11.9 96 Deadman Hill 10220 22.6 16.6 136 21.1 18.6 113 ----- ----- Basin Index (%) 145 107 LITTLE SNAKE RIVER Battle Mountain 7440 8.2 5.4 152 17.2 15.8 109 Divide Peak 8880 21.8 19.3 113 24.7 22.5 110 Elk River 8700 17.7 16.1 110 20.6 21.0 98 Little Snake River 8915 29.0 25.0 116 39.3 31.0 127 Old Battle 10000 38.4 32.4 119 38.4 36.6 105 Sage Creek Basin 7850 17.2 7.1 242 17.0 15.1 113 Sandstone RS 8150 13.4 10.8 124 19.2 19.2 100 Whiskey Park 8950 31.7 26.2 121 34.0 29.3 116 ----- ----- Basin Index (%) 125 110 UPPER GREEN RIVER Big Sandy Opening 9080 14.8 12.7 117 15.7 13.9 113 Blind Bull Sum 8650 26.1 23.9 109 20.7 20.1 103 East Rim Divide 7930 10.7 9.6 111 13.0 12.1 107 Elkhart Park G.S. 9400 14.2 12.0 118 14.9 13.9 107 Gros Ventre Summit 8750 7.9 13.2 60 13.4 13.5 99 Gunsight Pass 9820 13.7 13.5 101 16.9 14.6 116 Indian Creek 9425 24.9 23.3 107 19.9 23.3 85 Kendall R.S. 7740 10.2 9.0 113 12.6 14.6 86 Loomis Park 8240 16.5 13.2 125 18.3 17.8 103 New Fork Lake 8340 10.4 9.2 113 10.4 11.2 93 Pocket Creek 9360 15.9 -M * 16.3 -M * Snider Basin 8060 10.5 11.1 95 14.3 14.6 98 Spring Creek Divide 9000 25.0 23.5 106 25.6 24.6 104 Triple Peak 8500 26.2 19.3 136 27.5 26.1 105 ----- ----- Basin Index (%) 109 101 LOWER GREEN RIVER Blacks Fork Jct 8869 9.7 -M * 14.6 -M * Buck Pasture 9632 17.2 -M * 21.6 -M * EF Blacks Fork GS 9360 13.4 -M * 13.3 -M * Hams Fork 7840 9.1 7.5 121 12.3 11.9 103 Hewinta 9500 13.3 8.7 153 16.9 14.8 114 Hickerson Park 9122 10.3 5.8 178 13.1 10.9 120 Hole-in-Rock 9168 7.6 6.2 123 12.1 10.4 116 Indian Creek 9425 24.9 23.3 107 19.9 23.3 85 Kelley R.S. 8180 16.0 13.1 122 17.4 18.7 93 Spirit Lk 10235 18.0 -M * 18.9 -M * Steel Creek Park 10158 15.0 16.1 93 21.1 17.5 121 ----- ----- Basin Index (%) 119 105 UPPER BEAR RIVER Bear River RS 8777 10.8 -M * 17.0 -M * Bug Lake 7987 24.7 18.0 137 25.5 20.1 127 Burts Miller Ranch 8000 5.4 -M * 10.0 -M * Chalk Creek #1 9171 29.2 24.8 118 32.5 26.4 123 Hayden Fork 9130 17.0 12.6 135 25.5 22.1 115 Kelley R.S. 8180 16.0 13.1 122 17.4 18.7 93 Lily Lake 9133 15.0 11.3 133 18.2 18.1 101 Monte Cristo 8932 37.6 27.6 136 34.7 27.0 129 Salt River Summit 7640 15.3 10.3 149 18.3 17.2 106 Spring Creek Divide 9000 25.0 23.5 106 25.6 24.6 104 ----- ----- Basin Index (%) 127 113 ----------------------------------------------------------------------------- -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.