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 MONDAY: MARCH 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 18.2 14.6 125 20.4 18.9 108 Black Bear 8170 40.6 32.2 126 39.7 34.2 116 Blind Bull Sum 8650 21.4 20.3 105 17.0 17.5 97 Cottonwood Creek 7670 19.2 19.5 98 22.4 21.7 103 East Rim Divide 7930 10.3 9.5 108 10.4 10.5 99 Grand Targhee 9260 39.0 32.8 119 29.2 26.8 109 Granite Creek 6770 18.8 15.0 125 19.6 18.0 109 Grassy Lake 7265 31.5 29.1 108 34.6 32.3 107 Gros Ventre Summit 8750 8.9 11.4 78 11.2 11.3 99 Gunsight Pass 9820 12.3 11.9 103 14.0 12.0 117 Lewis Lake Divide 7850 32.9 27.5 120 30.9 31.8 97 Phillips Bench 8200 27.2 22.2 123 29.8 25.1 119 Salt River Summit 7640 12.5 11.9 105 14.2 14.8 96 Snake River Station 6920 19.9 15.2 131 24.1 20.2 119 Spring Creek Divide 9000 21.1 20.7 102 21.7 21.2 102 Thumb Divide 7980 17.5 13.9 126 17.6 16.3 108 Togwotee Pass 9580 22.1 20.4 108 22.7 21.5 106 Two Ocean Plateau 9240 28.0 23.8 118 23.8 24.1 99 Willow Creek 8080 28.1 25.3 111 31.0 29.6 105 Younts Peak 8350 -M 13.2 * -M 14.0 * ----- ----- Basin Index (%) 114 106 MADISON-GALLATIN Black Bear 8170 40.6 32.2 126 39.7 34.2 116 Canyon 7870 12.7 11.7 109 14.6 14.4 101 Madison Plateau 7750 26.4 20.0 132 25.5 23.4 109 West Yellowstone 6700 14.1 9.9 142 16.1 12.6 128 Whiskey Creek 6800 18.5 13.9 133 19.0 18.0 106 ----- ----- Basin Index (%) 128 112 YELLOWSTONE Beartooth Lake 9360 18.4 19.0 97 17.2 17.5 98 Burnt Mtn 5880 8.0 4.5 178 12.1 10.6 114 Canyon 7870 12.7 11.7 109 14.6 14.4 101 Cole Creek 7850 14.3 11.8 121 -M 10.5 * Evening Star 9200 23.7 21.9 108 26.2 24.2 108 Fisher Creek 9100 28.3 28.1 101 31.1 28.3 110 Northeast Entrance 7350 10.1 8.9 113 12.2 10.9 112 Parker Peak 9400 21.7 17.5 124 21.6 15.5 139 Sylvan Lake 8420 19.4 17.9 108 24.7 19.7 125 Thumb Divide 7980 17.5 13.9 126 17.6 16.3 108 Two Ocean Plateau 9240 28.0 23.8 118 23.8 24.1 99 White Mill 8700 20.0 19.7 102 17.6 21.0 84 Wolverine 7650 11.7 8.8 133 11.5 10.8 106 Younts Peak 8350 -M 13.2 * -M 14.0 * ----- ----- Basin Index (%) 113 108 WIND RIVER Burroughs Creek 8750 9.8 -M * 11.7 -M * Castle Creek 8400 3.9 -M * 5.1 -M * Cold Springs 9630 6.2 6.2 100 6.5 8.4 77 Deer Park 9700 15.0 12.8 117 16.2 16.9 96 Hobbs Park 10100 12.8 11.5 111 9.8 10.9 90 Kirwin 9550 9.3 8.3 112 9.8 9.8 100 Little Warm 9370 7.8 9.1 86 7.7 11.0 70 Owl Creek 8975 4.6 4.6 100 5.0 4.9 102 South Pass 9040 12.6 13.4 94 10.5 15.1 70 St. Lawrence Alt 8620 4.1 6.0 68 7.5 7.4 101 Togwotee Pass 9580 22.1 20.4 108 22.7 21.5 106 Townsend Creek 8700 8.2 8.0 102 9.1 9.9 92 ----- ----- Basin Index (%) 102 91 BIGHORN BASIN Bald Mtn. 9380 15.6 16.4 95 11.4 14.6 78 Bear Trap Meadow 8200 7.6 4.9 155 6.3 6.9 91 Bone Springs Div 9350 11.9 13.9 86 10.4 13.2 79 Grave Springs 8550 7.5 8.0 94 8.5 8.8 97 Kirwin 9550 9.3 8.3 112 9.8 9.8 100 Marquette 8760 6.5 -M * 7.9 -M * Middle Powder 7760 8.5 9.5 89 4.5 9.8 46 Owl Creek 8975 4.6 4.6 100 5.0 4.9 102 Powder River Pass 9480 9.0 9.0 100 8.6 10.6 81 Shell Creek 9580 12.1 12.7 95 10.4 11.7 89 Timber Creek 7950 3.3 4.2 79 5.1 6.0 85 ----- ----- Basin Index (%) 98 83 SHOSHONE RIVER Blackwater 9780 21.4 20.5 104 21.7 17.9 121 Evening Star 9200 23.7 21.9 108 26.2 24.2 108 Marquette 8760 6.5 -M * 7.9 -M * Sylvan Lake 8420 19.4 17.9 108 24.7 19.7 125 Sylvan Road 7120 11.5 10.3 112 15.1 15.0 101 Younts Peak 8350 -M 13.2 * -M 14.0 * ----- ----- Basin Index (%) 108 114 POWDER RIVER Bear Trap Meadow 8200 7.6 4.9 155 6.3 6.9 91 Cloud Peak Reservoir 9860 10.7 12.6 85 9.8 11.0 89 Grave Springs 8550 7.5 8.0 94 8.5 8.8 97 Hansen Sawmill 8360 4.9 5.5 89 6.4 7.0 91 Middle Powder 7760 8.5 9.5 89 4.5 9.8 46 Powder River Pass 9480 9.0 9.0 100 8.6 10.6 81 Soldier Park 8720 3.8 -M * 6.1 -M * ----- ----- Basin Index (%) 97 82 TONGUE RIVER Big Goose 7990 7.4 7.6 97 9.1 8.9 102 Bone Springs Div 9350 11.9 13.9 86 10.4 13.2 79 Burgess Junction 7880 7.6 9.4 81 7.8 10.3 76 Dome Lake 8880 8.0 10.0 80 7.3 11.2 65 Little Goose 8870 8.6 -M * 7.2 -M * Sucker Creek 8880 10.0 10.7 93 9.2 12.0 77 Tie Creek 6870 4.5 4.9 92 8.9 9.6 93 ----- ----- Basin Index (%) 87 81 BELLE FOURCHE Blind Park 6890 8.8 7.2 122 7.1 10.4 68 Cole Canyon 5910 7.1 5.5 129 10.7 7.8 137 ----- ----- Basin Index (%) 125 98 CHEYENNE RIVER BASIN Blind Park 6890 8.8 7.2 122 7.1 10.4 68 North Rapid Creek 6130 7.6 6.4 119 6.6 8.5 78 ----- ----- Basin Index (%) 121 72 UPPER N. PLATTE Arapaho Ridge 10960 24.4 18.0 136 24.6 19.4 127 Blackhall Mtn 9820 31.1 -M * 31.1 -M * Columbine 9160 29.0 21.8 133 27.1 22.6 120 Divide Peak 8880 20.4 17.4 117 22.4 18.8 119 Joe Wright 10120 21.1 18.9 112 28.4 22.5 126 Laprele Creek 8375 12.6 9.0 140 13.0 10.6 123 Med Bow 10500 35.9 -M * 32.5 -M * Never Summer 10280 21.2 17.6 120 17.9 -M * North French Creek 10130 28.9 24.6 117 28.6 23.4 122 Old Battle 10000 34.6 26.2 132 31.4 31.0 101 Rawah 9020 14.5 9.2 158 16.8 11.8 142 Sage Creek Basin 7850 17.6 11.6 152 16.0 12.9 124 Sand Lake 10050 27.7 24.2 114 23.8 21.3 112 South Brush Creek 8440 11.6 11.1 105 11.7 13.1 89 Tower 10500 49.1 39.5 124 -M 35.3 * Webber Springs 9250 26.0 20.9 124 29.9 23.5 127 Whiskey Park 8950 30.2 24.1 125 31.5 24.7 128 Willow Creek Pass 9540 15.4 10.8 143 16.3 11.6 141 Zirkel 9340 32.7 25.8 127 -M 25.1 * ----- ----- Basin Index (%) 126 120 SWEETWATER Deer Park 9700 15.0 12.8 117 16.2 16.9 96 Larsen Creek 9000 10.6 11.0 96 13.5 -M * South Pass 9040 12.6 13.4 94 10.5 15.1 70 ----- ----- Basin Index (%) 103 83 LOWER N. PLATTE Casper Mtn. 7900 14.2 12.0 118 11.0 12.5 88 Laprele Creek 8375 12.6 9.0 140 13.0 10.6 123 Reno Hill 8400 15.0 11.8 127 15.5 12.7 122 Windy Peak 7900 10.5 6.9 152 10.3 8.9 116 ----- ----- Basin Index (%) 132 111 LARAMIE RIVER Brooklyn Lake 10240 23.2 17.5 133 24.3 18.1 134 Cinnabar Park 9574 20.1 17.8 113 22.1 21.1 105 Crow Creek 8330 5.7 7.0 81 9.6 8.7 110 Deadman Hill 10220 20.0 13.7 146 18.7 14.7 127 Rawah 9020 14.5 9.2 158 16.8 11.8 142 Roach 9700 17.4 13.8 126 20.4 16.6 123 Windy Peak 7900 10.5 6.9 152 10.3 8.9 116 ----- ----- Basin Index (%) 130 122 S. PLATTE Black Mountain 8920 11.2 -M * 12.1 -M * Crow Creek 8330 5.7 7.0 81 9.6 8.7 110 Deadman Hill 10220 20.0 13.7 146 18.7 14.7 127 ----- ----- Basin Index (%) 124 121 LITTLE SNAKE RIVER Battle Mountain 7440 13.4 11.2 120 15.7 13.4 117 Divide Peak 8880 20.4 17.4 117 22.4 18.8 119 Elk River 8700 20.5 17.3 118 18.8 17.7 106 Little Snake River 8915 28.5 20.8 137 36.0 26.2 137 Old Battle 10000 34.6 26.2 132 31.4 31.0 101 Sage Creek Basin 7850 17.6 11.6 152 16.0 12.9 124 Sandstone RS 8150 17.9 11.8 152 18.1 16.5 110 Whiskey Park 8950 30.2 24.1 125 31.5 24.7 128 ----- ----- Basin Index (%) 130 118 UPPER GREEN RIVER Big Sandy Opening 9080 12.8 11.4 112 13.5 11.6 116 Blind Bull Sum 8650 21.4 20.3 105 17.0 17.5 97 East Rim Divide 7930 10.3 9.5 108 10.4 10.5 99 Elkhart Park G.S. 9400 11.7 10.5 111 12.4 11.7 106 Gros Ventre Summit 8750 8.9 11.4 78 11.2 11.3 99 Gunsight Pass 9820 12.3 11.9 103 14.0 12.0 117 Indian Creek 9425 20.0 21.0 95 16.0 19.8 81 Kendall R.S. 7740 10.9 11.1 98 11.1 12.8 87 Loomis Park 8240 15.1 13.2 114 15.7 15.4 102 New Fork Lake 8340 9.2 9.2 100 8.6 9.6 90 Pocket Creek 9360 13.2 -M * 13.9 -M * Snider Basin 8060 10.9 10.9 100 12.5 12.7 98 Spring Creek Divide 9000 21.1 20.7 102 21.7 21.2 102 Triple Peak 8500 21.2 19.2 110 23.1 22.5 103 ----- ----- Basin Index (%) 103 99 LOWER GREEN RIVER Blacks Fork Jct 8869 8.7 -M * 11.5 -M * Buck Pasture 9632 13.9 -M * 16.6 -M * EF Blacks Fork GS 9360 11.2 -M * 9.4 -M * Hams Fork 7840 10.0 10.2 98 10.2 10.0 102 Hewinta 9500 11.1 9.6 116 12.9 12.2 106 Hickerson Park 9122 8.0 6.6 121 10.0 8.7 115 Hole-in-Rock 9168 6.3 6.5 97 9.3 8.2 113 Indian Creek 9425 20.0 21.0 95 16.0 19.8 81 Kelley R.S. 8180 -M 13.2 * -M 16.0 * Spirit Lk 10235 14.1 -M * 14.4 -M * Steel Creek Park 10158 13.8 13.3 104 16.1 14.1 114 ----- ----- Basin Index (%) 103 102 UPPER BEAR RIVER Bear River RS 8777 11.3 -M * 13.6 -M * Bug Lake 7987 21.7 16.5 132 21.1 17.2 123 Burts Miller Ranch 8000 7.7 -M * 7.8 -M * Chalk Creek #1 9171 23.5 20.8 113 26.0 21.9 119 Hayden Fork 9130 16.9 14.2 119 21.3 18.3 116 Kelley R.S. 8180 -M 13.2 * -M 16.0 * Lily Lake 9133 11.7 11.4 103 14.7 14.8 99 Monte Cristo 8932 29.4 24.1 122 28.3 22.8 124 Salt River Summit 7640 12.5 11.9 105 14.2 14.8 96 Spring Creek Divide 9000 21.1 20.7 102 21.7 21.2 102 ----- ----- Basin Index (%) 114 112 ----------------------------------------------------------------------------- -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.