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 FRIDAY: MARCH 15 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 18.0 14.2 127 20.1 18.6 108 Black Bear 8170 40.5 32.0 127 39.6 33.7 118 Blind Bull Sum 8650 21.2 20.0 106 16.9 17.2 98 Cottonwood Creek 7670 19.2 18.9 102 22.4 21.2 106 East Rim Divide 7930 10.1 9.5 106 10.3 10.3 100 Grand Targhee 9260 38.9 32.5 120 29.1 26.5 110 Granite Creek 6770 18.6 14.9 125 19.5 17.7 110 Grassy Lake 7265 31.4 28.5 110 34.5 31.8 108 Gros Ventre Summit 8750 8.9 11.1 80 11.0 11.1 99 Gunsight Pass 9820 12.1 11.7 103 14.0 11.9 118 Lewis Lake Divide 7850 32.6 27.2 120 30.9 31.3 99 Phillips Bench 8200 27.2 21.8 125 -M 24.6 * Salt River Summit 7640 12.4 11.6 107 14.0 14.5 97 Snake River Station 6920 19.8 15.2 130 24.1 19.9 121 Spring Creek Divide 9000 20.8 20.1 103 21.4 20.8 103 Thumb Divide 7980 17.3 13.6 127 16.3 16.0 102 Togwotee Pass 9580 22.1 20.0 110 22.6 21.1 107 Two Ocean Plateau 9240 27.9 23.5 119 21.9 23.7 92 Willow Creek 8080 27.9 24.7 113 30.9 29.1 106 Younts Peak 8350 -M 12.8 * -M 13.7 * ----- ----- Basin Index (%) 115 106 MADISON-GALLATIN Black Bear 8170 40.5 32.0 127 39.6 33.7 118 Canyon 7870 12.6 11.6 109 14.4 14.2 101 Madison Plateau 7750 26.3 19.8 133 25.5 23.1 110 West Yellowstone 6700 14.0 9.9 141 16.0 12.5 128 Whiskey Creek 6800 18.4 13.6 135 18.9 17.7 107 ----- ----- Basin Index (%) 129 113 YELLOWSTONE Beartooth Lake 9360 18.4 18.6 99 17.1 17.1 100 Burnt Mtn 5880 8.0 4.4 182 12.0 10.5 114 Canyon 7870 12.6 11.6 109 14.4 14.2 101 Cole Creek 7850 14.0 11.5 122 -M 10.2 * Evening Star 9200 23.6 21.6 109 25.7 23.7 108 Fisher Creek 9100 28.2 27.7 102 30.9 27.7 112 Northeast Entrance 7350 10.0 8.7 115 12.2 10.7 114 Parker Peak 9400 21.6 17.1 126 21.4 15.3 140 Sylvan Lake 8420 19.3 17.5 110 24.7 19.4 127 Thumb Divide 7980 17.3 13.6 127 16.3 16.0 102 Two Ocean Plateau 9240 27.9 23.5 119 21.9 23.7 92 White Mill 8700 19.9 19.4 103 17.5 20.6 85 Wolverine 7650 11.7 8.8 133 11.6 10.7 108 Younts Peak 8350 -M 12.8 * -M 13.7 * ----- ----- Basin Index (%) 114 108 WIND RIVER Burroughs Creek 8750 9.7 -M * 11.4 -M * Castle Creek 8400 3.7 -M * 5.1 -M * Cold Springs 9630 6.1 6.1 100 6.4 8.2 78 Deer Park 9700 15.0 12.3 122 15.9 16.6 96 Hobbs Park 10100 12.6 11.2 112 9.3 10.6 88 Kirwin 9550 9.2 8.1 114 9.5 9.6 99 Little Warm 9370 7.7 9.0 86 7.3 10.8 68 Owl Creek 8975 4.4 4.5 98 4.9 4.7 104 South Pass 9040 12.5 12.9 97 10.4 14.8 70 St. Lawrence Alt 8620 3.8 5.9 64 7.4 7.2 103 Togwotee Pass 9580 22.1 20.0 110 22.6 21.1 107 Townsend Creek 8700 8.1 7.6 107 8.8 9.6 92 ----- ----- Basin Index (%) 104 91 BIGHORN BASIN Bald Mtn. 9380 15.6 16.2 96 11.1 14.3 78 Bear Trap Meadow 8200 7.4 4.8 154 6.2 6.8 91 Bone Springs Div 9350 11.9 13.6 88 9.9 12.8 77 Grave Springs 8550 7.4 7.7 96 8.2 8.6 95 Kirwin 9550 9.2 8.1 114 9.5 9.6 99 Marquette 8760 6.4 -M * 7.8 -M * Middle Powder 7760 8.5 9.1 93 4.4 9.6 46 Owl Creek 8975 4.4 4.5 98 4.9 4.7 104 Powder River Pass 9480 9.1 8.8 103 8.4 10.4 81 Shell Creek 9580 12.0 12.5 96 10.2 11.4 89 Timber Creek 7950 3.2 4.2 76 5.1 5.8 88 ----- ----- Basin Index (%) 99 83 SHOSHONE RIVER Blackwater 9780 21.3 19.7 108 21.6 17.6 123 Evening Star 9200 23.6 21.6 109 25.7 23.7 108 Marquette 8760 6.4 -M * 7.8 -M * Sylvan Lake 8420 19.3 17.5 110 24.7 19.4 127 Sylvan Road 7120 11.7 10.2 115 15.1 14.8 102 Younts Peak 8350 -M 12.8 * -M 13.7 * ----- ----- Basin Index (%) 110 115 POWDER RIVER Bear Trap Meadow 8200 7.4 4.8 154 6.2 6.8 91 Cloud Peak Reservoir 9860 10.6 12.2 87 9.4 10.6 89 Grave Springs 8550 7.4 7.7 96 8.2 8.6 95 Hansen Sawmill 8360 4.7 5.3 89 6.2 6.8 91 Middle Powder 7760 8.5 9.1 93 4.4 9.6 46 Powder River Pass 9480 9.1 8.8 103 8.4 10.4 81 Soldier Park 8720 3.6 -M * 6.0 -M * ----- ----- Basin Index (%) 100 81 TONGUE RIVER Big Goose 7990 7.2 7.4 97 8.9 8.7 102 Bone Springs Div 9350 11.9 13.6 88 9.9 12.8 77 Burgess Junction 7880 7.5 9.4 80 7.6 10.0 76 Dome Lake 8880 8.0 9.7 82 7.1 10.9 65 Little Goose 8870 8.5 -M * 7.1 -M * Sucker Creek 8880 9.9 10.4 95 8.9 11.7 76 Tie Creek 6870 4.4 4.7 94 8.7 9.3 94 ----- ----- Basin Index (%) 89 81 BELLE FOURCHE Blind Park 6890 8.8 7.1 124 7.1 10.2 70 Cole Canyon 5910 -M 5.4 * 10.8 7.7 140 ----- ----- Basin Index (%) 124 100 CHEYENNE RIVER BASIN Blind Park 6890 8.8 7.1 124 7.1 10.2 70 North Rapid Creek 6130 7.6 6.4 119 6.6 8.3 80 ----- ----- Basin Index (%) 121 74 UPPER N. PLATTE Arapaho Ridge 10960 24.4 18.0 136 24.3 19.0 128 Blackhall Mtn 9820 30.8 -M * 30.8 -M * Columbine 9160 28.3 21.5 132 26.6 22.2 120 Divide Peak 8880 20.2 17.2 117 22.1 18.4 120 Joe Wright 10120 20.8 18.7 111 28.4 22.0 129 Laprele Creek 8375 12.5 8.8 142 13.0 10.4 125 Med Bow 10500 36.0 -M * 32.5 -M * Never Summer 10280 21.1 17.3 122 17.8 -M * North French Creek 10130 28.6 23.9 120 28.4 23.0 123 Old Battle 10000 34.6 26.0 133 31.1 30.5 102 Rawah 9020 14.5 9.2 158 16.7 11.6 144 Sage Creek Basin 7850 17.5 11.8 148 15.9 12.8 124 Sand Lake 10050 27.6 23.5 117 23.6 20.9 113 South Brush Creek 8440 11.3 11.2 101 11.6 12.9 90 Tower 10500 49.0 38.9 126 -M 34.6 * Webber Springs 9250 26.0 20.5 127 29.7 23.1 129 Whiskey Park 8950 29.5 23.8 124 31.3 24.4 128 Willow Creek Pass 9540 15.2 10.5 145 16.3 11.3 144 Zirkel 9340 32.4 25.5 127 31.2 24.8 126 ----- ----- Basin Index (%) 127 122 SWEETWATER Deer Park 9700 15.0 12.3 122 15.9 16.6 96 Larsen Creek 9000 10.4 10.7 97 13.4 -M * South Pass 9040 12.5 12.9 97 10.4 14.8 70 ----- ----- Basin Index (%) 106 84 LOWER N. PLATTE Casper Mtn. 7900 14.3 11.8 121 10.9 12.3 89 Laprele Creek 8375 12.5 8.8 142 13.0 10.4 125 Reno Hill 8400 14.8 11.5 129 15.3 12.4 123 Windy Peak 7900 10.4 6.7 155 9.7 8.7 111 ----- ----- Basin Index (%) 134 112 LARAMIE RIVER Brooklyn Lake 10240 23.0 17.3 133 24.2 17.8 136 Cinnabar Park 9574 20.0 17.8 112 22.0 20.8 106 Crow Creek 8330 5.7 7.1 80 9.6 8.6 112 Deadman Hill 10220 20.0 13.4 149 18.6 14.3 130 Rawah 9020 14.5 9.2 158 16.7 11.6 144 Roach 9700 17.2 13.5 127 20.3 16.3 125 Windy Peak 7900 10.4 6.7 155 9.7 8.7 111 ----- ----- Basin Index (%) 130 123 S. PLATTE Black Mountain 8920 11.2 -M * 12.1 -M * Crow Creek 8330 5.7 7.1 80 9.6 8.6 112 Deadman Hill 10220 20.0 13.4 149 18.6 14.3 130 ----- ----- Basin Index (%) 125 123 LITTLE SNAKE RIVER Battle Mountain 7440 13.4 10.9 123 15.6 13.2 118 Divide Peak 8880 20.2 17.2 117 22.1 18.4 120 Elk River 8700 20.1 17.2 117 18.6 17.4 107 Little Snake River 8915 28.2 20.5 138 35.0 26.1 134 Old Battle 10000 34.6 26.0 133 31.1 30.5 102 Sage Creek Basin 7850 17.5 11.8 148 15.9 12.8 124 Sandstone RS 8150 17.5 11.6 151 18.0 16.3 110 Whiskey Park 8950 29.5 23.8 124 31.3 24.4 128 ----- ----- Basin Index (%) 130 118 UPPER GREEN RIVER Big Sandy Opening 9080 12.7 11.1 114 13.4 11.4 118 Blind Bull Sum 8650 21.2 20.0 106 16.9 17.2 98 East Rim Divide 7930 10.1 9.5 106 10.3 10.3 100 Elkhart Park G.S. 9400 11.5 10.3 112 12.3 11.4 108 Gros Ventre Summit 8750 8.9 11.1 80 11.0 11.1 99 Gunsight Pass 9820 12.1 11.7 103 14.0 11.9 118 Indian Creek 9425 19.8 20.7 96 15.8 19.3 82 Kendall R.S. 7740 10.7 10.9 98 11.0 12.6 87 Loomis Park 8240 15.0 13.0 115 15.7 15.1 104 New Fork Lake 8340 9.1 9.2 99 8.5 9.5 89 Pocket Creek 9360 13.1 -M * 13.8 -M * Snider Basin 8060 10.8 10.8 100 12.5 12.4 101 Spring Creek Divide 9000 20.8 20.1 103 21.4 20.8 103 Triple Peak 8500 21.1 19.0 111 23.1 22.0 105 ----- ----- Basin Index (%) 104 100 LOWER GREEN RIVER Blacks Fork Jct 8869 8.6 -M * 11.5 -M * Buck Pasture 9632 13.8 -M * 16.5 -M * EF Blacks Fork GS 9360 11.1 -M * 9.4 -M * Hams Fork 7840 9.9 10.1 98 10.1 9.8 103 Hewinta 9500 10.9 9.1 120 12.8 11.9 108 Hickerson Park 9122 7.9 6.6 120 9.8 8.5 115 Hole-in-Rock 9168 6.2 6.3 98 9.2 7.9 116 Indian Creek 9425 19.8 20.7 96 15.8 19.3 82 Kelley R.S. 8180 12.9 12.9 100 13.5 15.7 86 Spirit Lk 10235 13.9 -M * 14.3 -M * Steel Creek Park 10158 13.7 13.0 105 16.0 13.8 116 ----- ----- Basin Index (%) 103 100 UPPER BEAR RIVER Bear River RS 8777 11.1 -M * 13.6 -M * Bug Lake 7987 21.6 16.4 132 21.1 16.9 125 Burts Miller Ranch 8000 7.7 -M * 7.8 -M * Chalk Creek #1 9171 23.5 20.5 115 -M 21.4 * Hayden Fork 9130 16.9 14.0 121 21.3 17.9 119 Kelley R.S. 8180 12.9 12.9 100 13.5 15.7 86 Lily Lake 9133 11.6 11.3 103 14.7 14.5 101 Monte Cristo 8932 29.3 23.5 125 28.2 22.4 126 Salt River Summit 7640 12.4 11.6 107 14.0 14.5 97 Spring Creek Divide 9000 20.8 20.1 103 21.4 20.8 103 ----- ----- Basin Index (%) 114 109 ----------------------------------------------------------------------------- -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.