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: MARCH 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 18.2 14.4 126 20.3 18.8 108 Black Bear 8170 40.6 32.2 126 39.6 33.9 117 Blind Bull Sum 8650 21.2 20.2 105 17.0 17.4 98 Cottonwood Creek 7670 19.2 19.3 99 22.5 21.5 105 East Rim Divide 7930 10.3 9.5 108 10.4 10.4 100 Grand Targhee 9260 38.9 32.7 119 29.1 26.7 109 Granite Creek 6770 18.7 14.9 126 19.6 17.9 109 Grassy Lake 7265 31.4 28.9 109 34.5 32.2 107 Gros Ventre Summit 8750 8.8 11.3 78 11.1 11.2 99 Gunsight Pass 9820 12.3 11.9 103 14.0 12.0 117 Lewis Lake Divide 7850 32.8 27.4 120 30.9 31.6 98 Phillips Bench 8200 27.2 22.0 124 -M 24.9 * Salt River Summit 7640 12.5 11.8 106 14.1 14.7 96 Snake River Station 6920 20.0 15.2 132 24.1 20.1 120 Spring Creek Divide 9000 21.1 20.5 103 21.6 21.1 102 Thumb Divide 7980 17.5 13.8 127 16.5 16.2 102 Togwotee Pass 9580 22.1 20.3 109 22.7 21.4 106 Two Ocean Plateau 9240 27.9 23.7 118 23.7 24.0 99 Willow Creek 8080 28.0 25.2 111 31.0 29.4 105 Younts Peak 8350 -M 13.1 * -M 13.9 * ----- ----- Basin Index (%) 114 106 MADISON-GALLATIN Black Bear 8170 40.6 32.2 126 39.6 33.9 117 Canyon 7870 12.6 11.7 108 14.6 14.3 102 Madison Plateau 7750 26.3 19.9 132 25.5 23.3 109 West Yellowstone 6700 14.0 9.9 141 16.1 12.6 128 Whiskey Creek 6800 18.5 13.8 134 18.9 17.9 106 ----- ----- Basin Index (%) 128 112 YELLOWSTONE Beartooth Lake 9360 18.4 18.8 98 17.2 17.4 99 Burnt Mtn 5880 8.0 4.4 182 12.1 10.6 114 Canyon 7870 12.6 11.7 108 14.6 14.3 102 Cole Creek 7850 14.3 11.7 122 -M 10.3 * Evening Star 9200 23.7 21.8 109 26.2 24.0 109 Fisher Creek 9100 28.2 28.0 101 31.0 28.1 110 Northeast Entrance 7350 10.1 8.8 115 12.2 10.8 113 Parker Peak 9400 21.7 17.3 125 21.5 15.4 140 Sylvan Lake 8420 19.2 17.8 108 24.7 19.6 126 Thumb Divide 7980 17.5 13.8 127 16.5 16.2 102 Two Ocean Plateau 9240 27.9 23.7 118 23.7 24.0 99 White Mill 8700 20.0 19.6 102 17.6 20.9 84 Wolverine 7650 11.8 8.8 134 11.6 10.8 107 Younts Peak 8350 -M 13.1 * -M 13.9 * ----- ----- Basin Index (%) 113 108 WIND RIVER Burroughs Creek 8750 9.8 -M * 11.6 -M * Castle Creek 8400 3.9 -M * 5.1 -M * Cold Springs 9630 6.2 6.2 100 6.5 8.3 78 Deer Park 9700 15.1 12.6 120 16.1 16.8 96 Hobbs Park 10100 12.8 11.4 112 9.8 10.8 91 Kirwin 9550 9.2 8.3 111 9.7 9.7 100 Little Warm 9370 7.8 9.1 86 7.6 10.9 70 Owl Creek 8975 4.6 4.5 102 5.0 4.8 104 South Pass 9040 12.6 13.2 95 10.5 15.0 70 St. Lawrence Alt 8620 4.0 5.9 68 7.5 7.3 103 Togwotee Pass 9580 22.1 20.3 109 22.7 21.4 106 Townsend Creek 8700 8.2 7.9 104 9.0 9.8 92 ----- ----- Basin Index (%) 103 91 BIGHORN BASIN Bald Mtn. 9380 15.6 16.3 96 11.4 14.5 79 Bear Trap Meadow 8200 7.5 4.9 153 6.3 6.8 93 Bone Springs Div 9350 11.9 13.8 86 10.4 13.1 79 Grave Springs 8550 7.5 7.9 95 8.4 8.7 97 Kirwin 9550 9.2 8.3 111 9.7 9.7 100 Marquette 8760 6.5 -M * 7.9 -M * Middle Powder 7760 8.5 9.3 91 4.5 9.7 46 Owl Creek 8975 4.6 4.5 102 5.0 4.8 104 Powder River Pass 9480 9.0 8.9 101 8.5 10.6 80 Shell Creek 9580 12.1 12.6 96 10.4 11.6 90 Timber Creek 7950 3.3 4.2 79 5.1 5.9 86 ----- ----- Basin Index (%) 98 84 SHOSHONE RIVER Blackwater 9780 21.3 20.2 105 21.7 17.8 122 Evening Star 9200 23.7 21.8 109 26.2 24.0 109 Marquette 8760 6.5 -M * 7.9 -M * Sylvan Lake 8420 19.2 17.8 108 24.7 19.6 126 Sylvan Road 7120 11.6 10.3 113 15.0 14.9 101 Younts Peak 8350 -M 13.1 * -M 13.9 * ----- ----- Basin Index (%) 108 115 POWDER RIVER Bear Trap Meadow 8200 7.5 4.9 153 6.3 6.8 93 Cloud Peak Reservoir 9860 10.7 12.5 86 9.8 10.8 91 Grave Springs 8550 7.5 7.9 95 8.4 8.7 97 Hansen Sawmill 8360 4.8 5.5 87 6.4 6.9 93 Middle Powder 7760 8.5 9.3 91 4.5 9.7 46 Powder River Pass 9480 9.0 8.9 101 8.5 10.6 80 Soldier Park 8720 3.7 -M * 6.1 -M * ----- ----- Basin Index (%) 98 82 TONGUE RIVER Big Goose 7990 7.4 7.5 99 9.1 8.8 103 Bone Springs Div 9350 11.9 13.8 86 10.4 13.1 79 Burgess Junction 7880 7.6 9.4 81 7.8 10.1 77 Dome Lake 8880 8.1 9.9 82 7.3 11.1 66 Little Goose 8870 8.6 -M * 7.2 -M * Sucker Creek 8880 10.0 10.6 94 9.2 11.8 78 Tie Creek 6870 4.5 4.8 94 8.9 9.5 94 ----- ----- Basin Index (%) 88 82 BELLE FOURCHE Blind Park 6890 8.8 7.2 122 7.1 10.3 69 Cole Canyon 5910 -M 5.4 * 10.8 7.8 138 ----- ----- Basin Index (%) 122 99 CHEYENNE RIVER BASIN Blind Park 6890 8.8 7.2 122 7.1 10.3 69 North Rapid Creek 6130 7.6 6.4 119 6.6 8.4 79 ----- ----- Basin Index (%) 121 73 UPPER N. PLATTE Arapaho Ridge 10960 24.4 18.0 136 24.4 19.1 128 Blackhall Mtn 9820 31.0 -M * 31.0 -M * Columbine 9160 28.6 21.7 132 27.0 22.5 120 Divide Peak 8880 20.3 17.4 117 22.4 18.6 120 Joe Wright 10120 21.0 18.8 112 28.4 22.3 127 Laprele Creek 8375 12.6 9.0 140 13.0 10.5 124 Med Bow 10500 35.9 -M * 32.6 -M * Never Summer 10280 21.2 17.5 121 17.8 -M * North French Creek 10130 28.7 24.3 118 28.5 23.2 123 Old Battle 10000 34.6 26.1 133 31.2 30.8 101 Rawah 9020 14.6 9.2 159 16.8 11.7 144 Sage Creek Basin 7850 17.6 11.7 150 -M 12.8 * Sand Lake 10050 27.7 23.9 116 23.8 21.1 113 South Brush Creek 8440 11.4 11.1 103 11.7 13.0 90 Tower 10500 49.1 39.3 125 -M 35.1 * Webber Springs 9250 26.0 20.8 125 29.9 23.3 128 Whiskey Park 8950 -M 24.0 * -M 24.5 * Willow Creek Pass 9540 15.3 10.7 143 16.3 11.5 142 Zirkel 9340 32.7 25.7 127 -M 25.0 * ----- ----- Basin Index (%) 126 120 SWEETWATER Deer Park 9700 15.1 12.6 120 16.1 16.8 96 Larsen Creek 9000 10.6 10.9 97 13.5 -M * South Pass 9040 12.6 13.2 95 10.5 15.0 70 ----- ----- Basin Index (%) 104 84 LOWER N. PLATTE Casper Mtn. 7900 14.3 11.9 120 11.0 12.4 89 Laprele Creek 8375 12.6 9.0 140 13.0 10.5 124 Reno Hill 8400 14.9 11.7 127 15.5 12.5 124 Windy Peak 7900 10.5 6.8 154 10.1 8.8 115 ----- ----- Basin Index (%) 133 112 LARAMIE RIVER Brooklyn Lake 10240 23.1 17.5 132 24.3 18.0 135 Cinnabar Park 9574 20.1 17.8 113 22.0 21.1 104 Crow Creek 8330 5.7 7.1 80 9.7 8.7 111 Deadman Hill 10220 20.0 13.6 147 18.7 14.5 129 Rawah 9020 14.6 9.2 159 16.8 11.7 144 Roach 9700 17.3 13.7 126 20.4 16.5 124 Windy Peak 7900 10.5 6.8 154 10.1 8.8 115 ----- ----- Basin Index (%) 130 123 S. PLATTE Black Mountain 8920 11.2 -M * 12.1 -M * Crow Creek 8330 5.7 7.1 80 9.7 8.7 111 Deadman Hill 10220 20.0 13.6 147 18.7 14.5 129 ----- ----- Basin Index (%) 124 122 LITTLE SNAKE RIVER Battle Mountain 7440 13.4 11.1 121 15.7 13.3 118 Divide Peak 8880 20.3 17.4 117 22.4 18.6 120 Elk River 8700 20.5 17.3 118 18.7 17.6 106 Little Snake River 8915 28.4 20.7 137 36.0 26.2 137 Old Battle 10000 34.6 26.1 133 31.2 30.8 101 Sage Creek Basin 7850 17.6 11.7 150 -M 12.8 * Sandstone RS 8150 17.8 11.7 152 18.1 16.4 110 Whiskey Park 8950 -M 24.0 * -M 24.5 * ----- ----- Basin Index (%) 132 116 UPPER GREEN RIVER Big Sandy Opening 9080 12.7 11.3 112 13.5 11.6 116 Blind Bull Sum 8650 21.2 20.2 105 17.0 17.4 98 East Rim Divide 7930 10.3 9.5 108 10.4 10.4 100 Elkhart Park G.S. 9400 11.7 10.5 111 12.4 11.6 107 Gros Ventre Summit 8750 8.8 11.3 78 11.1 11.2 99 Gunsight Pass 9820 12.3 11.9 103 14.0 12.0 117 Indian Creek 9425 20.0 20.9 96 16.0 19.7 81 Kendall R.S. 7740 10.9 11.0 99 11.1 12.8 87 Loomis Park 8240 15.2 13.1 116 15.7 15.3 103 New Fork Lake 8340 9.2 9.2 100 8.6 9.6 90 Pocket Creek 9360 13.2 -M * 14.0 -M * Snider Basin 8060 10.9 10.9 100 12.5 12.6 99 Spring Creek Divide 9000 21.1 20.5 103 21.6 21.1 102 Triple Peak 8500 21.2 19.2 110 23.1 22.3 104 ----- ----- Basin Index (%) 103 100 LOWER GREEN RIVER Blacks Fork Jct 8869 8.6 -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 11.0 9.4 117 12.9 12.0 108 Hickerson Park 9122 8.0 6.6 121 9.9 8.6 115 Hole-in-Rock 9168 6.3 6.4 98 9.3 8.1 115 Indian Creek 9425 20.0 20.9 96 16.0 19.7 81 Kelley R.S. 8180 -M 13.1 * -M 15.9 * Spirit Lk 10235 14.1 -M * 14.4 -M * Steel Creek Park 10158 13.8 13.2 105 16.1 14.0 115 ----- ----- Basin Index (%) 104 103 UPPER BEAR RIVER Bear River RS 8777 11.2 -M * 13.6 -M * Bug Lake 7987 21.7 16.5 132 21.1 17.1 123 Burts Miller Ranch 8000 7.7 -M * 7.8 -M * Chalk Creek #1 9171 23.5 20.6 114 26.0 21.7 120 Hayden Fork 9130 16.9 14.1 120 21.4 18.2 118 Kelley R.S. 8180 -M 13.1 * -M 15.9 * Lily Lake 9133 11.7 11.4 103 14.7 14.7 100 Monte Cristo 8932 29.3 23.9 123 28.3 22.7 125 Salt River Summit 7640 12.5 11.8 106 14.1 14.7 96 Spring Creek Divide 9000 21.1 20.5 103 21.6 21.1 102 ----- ----- Basin Index (%) 115 113 ----------------------------------------------------------------------------- -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.