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: FEBRUARY 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 13.6 12.9 105 15.7 16.0 98 Black Bear 8170 28.0 27.5 102 28.1 28.4 99 Blind Bull Sum 8650 15.6 16.5 95 13.0 14.8 88 Cottonwood Creek 7670 16.3 15.2 107 19.1 18.1 106 East Rim Divide 7930 7.9 7.4 107 8.2 8.7 94 Grand Targhee 9260 33.4 27.2 123 25.3 23.5 108 Granite Creek 6770 13.8 12.8 108 15.4 15.3 101 Grassy Lake 7265 22.9 24.5 93 26.5 27.5 96 Gros Ventre Summit 8750 6.9 9.1 76 8.1 9.3 87 Gunsight Pass 9820 9.5 9.8 97 11.7 10.1 116 Lewis Lake Divide 7850 22.3 23.7 94 25.6 26.7 96 Phillips Bench 8200 20.6 18.2 113 21.8 21.0 104 Salt River Summit 7640 9.8 9.6 102 11.7 12.3 95 Snake River Station 6920 13.9 13.4 104 18.4 17.5 105 Spring Creek Divide 9000 16.9 16.6 102 17.9 17.8 101 Thumb Divide 7980 11.7 11.0 106 12.8 13.6 94 Togwotee Pass 9580 17.7 16.7 106 18.4 18.0 102 Two Ocean Plateau 9240 20.4 19.8 103 17.2 20.0 86 Willow Creek 8080 21.3 20.0 106 25.2 24.6 102 Younts Peak 8350 -M 11.1 * -M 11.8 * ----- ----- Basin Index (%) 103 99 MADISON-GALLATIN Black Bear 8170 28.0 27.5 102 28.1 28.4 99 Canyon 7870 9.0 9.6 94 10.7 12.2 88 Madison Plateau 7750 17.4 16.1 108 17.7 19.4 91 West Yellowstone 6700 9.6 7.9 122 11.2 10.9 103 Whiskey Creek 6800 11.9 11.1 107 12.5 15.0 83 ----- ----- Basin Index (%) 105 93 YELLOWSTONE Beartooth Lake 9360 12.6 15.5 81 11.4 14.6 78 Burnt Mtn 5880 5.4 3.7 146 9.6 8.9 108 Canyon 7870 9.0 9.6 94 10.7 12.2 88 Cole Creek 7850 11.3 8.9 127 -M 8.5 * Evening Star 9200 18.1 18.0 101 20.6 20.5 100 Fisher Creek 9100 20.2 23.9 85 23.3 23.6 99 Northeast Entrance 7350 7.8 7.5 104 9.9 9.3 106 Parker Peak 9400 16.1 14.4 112 16.8 12.9 130 Sylvan Lake 8420 14.8 14.6 101 19.9 16.7 119 Thumb Divide 7980 11.7 11.0 106 12.8 13.6 94 Two Ocean Plateau 9240 20.4 19.8 103 17.2 20.0 86 White Mill 8700 14.9 16.6 90 13.2 17.7 75 Wolverine 7650 8.1 8.1 100 8.5 9.3 91 Younts Peak 8350 -M 11.1 * -M 11.8 * ----- ----- Basin Index (%) 99 97 WIND RIVER Burroughs Creek 8750 6.6 -M * 8.3 -M * Castle Creek 8400 3.0 -M * 4.3 -M * Cold Springs 9630 5.0 5.3 94 5.2 6.9 75 Deer Park 9700 12.6 10.0 126 13.2 14.1 94 Hobbs Park 10100 10.1 8.8 115 7.5 8.8 85 Kirwin 9550 6.6 6.2 106 6.8 8.1 84 Little Warm 9370 6.1 7.5 81 5.9 9.1 65 Owl Creek 8975 3.9 3.4 115 4.5 4.0 112 South Pass 9040 10.5 10.4 101 9.2 12.5 74 St. Lawrence Alt 8620 3.3 4.7 70 6.5 6.0 108 Togwotee Pass 9580 17.7 16.7 106 18.4 18.0 102 Townsend Creek 8700 6.8 5.9 115 7.6 8.1 94 ----- ----- Basin Index (%) 105 89 BIGHORN BASIN Bald Mtn. 9380 13.7 13.3 103 9.3 12.0 78 Bear Trap Meadow 8200 6.2 3.9 159 5.2 5.7 91 Bone Springs Div 9350 10.2 11.0 93 8.5 10.8 79 Grave Springs 8550 5.6 5.7 98 6.4 7.3 88 Kirwin 9550 6.6 6.2 106 6.8 8.1 84 Marquette 8760 5.4 -M * 7.0 -M * Middle Powder 7760 7.0 7.2 97 3.8 8.2 46 Owl Creek 8975 3.9 3.4 115 4.5 4.0 112 Powder River Pass 9480 8.0 7.3 110 7.1 8.8 81 Shell Creek 9580 10.6 10.3 103 9.1 9.8 93 Timber Creek 7950 2.8 3.1 90 4.7 4.9 96 ----- ----- Basin Index (%) 104 82 SHOSHONE RIVER Blackwater 9780 15.7 15.9 99 16.5 15.0 110 Evening Star 9200 18.1 18.0 101 20.6 20.5 100 Marquette 8760 5.4 -M * 7.0 -M * Sylvan Lake 8420 14.8 14.6 101 19.9 16.7 119 Sylvan Road 7120 8.8 8.7 101 11.9 13.1 91 Younts Peak 8350 -M 11.1 * -M 11.8 * ----- ----- Basin Index (%) 100 106 POWDER RIVER Bear Trap Meadow 8200 6.2 3.9 159 5.2 5.7 91 Cloud Peak Reservoir 9860 8.9 9.7 92 7.5 8.8 85 Grave Springs 8550 5.6 5.7 98 6.4 7.3 88 Hansen Sawmill 8360 3.8 4.4 86 5.4 5.6 96 Middle Powder 7760 7.0 7.2 97 3.8 8.2 46 Powder River Pass 9480 8.0 7.3 110 7.1 8.8 81 Soldier Park 8720 2.7 -M * 5.0 -M * ----- ----- Basin Index (%) 103 80 TONGUE RIVER Big Goose 7990 5.4 5.8 93 6.8 7.4 92 Bone Springs Div 9350 10.2 11.0 93 8.5 10.8 79 Burgess Junction 7880 6.2 7.5 83 6.3 8.4 75 Dome Lake 8880 6.0 7.9 76 5.7 9.3 61 Little Goose 8870 6.7 -M * 5.8 -M * Sucker Creek 8880 8.0 8.1 99 7.3 9.8 74 Tie Creek 6870 3.1 4.0 78 6.4 7.9 81 ----- ----- Basin Index (%) 88 76 BELLE FOURCHE Blind Park 6890 6.9 5.7 121 5.8 8.8 66 Cole Canyon 5910 5.3 4.6 115 8.6 6.7 128 ----- ----- Basin Index (%) 118 93 CHEYENNE RIVER BASIN Blind Park 6890 6.9 5.7 121 5.8 8.8 66 North Rapid Creek 6130 5.4 5.4 100 5.4 7.1 76 ----- ----- Basin Index (%) 111 70 UPPER N. PLATTE Arapaho Ridge 10960 17.8 15.1 118 18.3 16.3 112 Blackhall Mtn 9820 22.5 -M * 24.3 -M * Columbine 9160 20.4 17.8 115 20.8 18.8 111 Divide Peak 8880 14.4 14.3 101 17.3 15.7 110 Joe Wright 10120 14.5 15.0 97 21.9 18.3 120 Laprele Creek 8375 8.9 6.8 131 9.6 8.6 112 Med Bow 10500 26.5 -M * 25.3 -M * Never Summer 10280 15.3 14.4 106 13.4 -M * North French Creek 10130 21.3 19.4 110 22.3 19.4 115 Old Battle 10000 25.6 22.4 114 26.7 25.9 103 Rawah 9020 8.8 7.5 117 11.5 10.0 115 Sage Creek Basin 7850 13.3 10.0 133 13.1 11.1 118 Sand Lake 10050 19.8 19.0 104 16.4 17.4 94 South Brush Creek 8440 8.0 8.8 91 8.6 10.7 80 Tower 10500 38.1 33.2 115 33.7 29.3 115 Webber Springs 9250 18.2 17.0 107 24.6 19.5 126 Whiskey Park 8950 21.1 19.5 108 24.2 20.8 116 Willow Creek Pass 9540 10.3 8.7 118 12.0 9.5 126 Zirkel 9340 22.9 21.3 108 27.3 21.7 126 ----- ----- Basin Index (%) 111 113 SWEETWATER Deer Park 9700 12.6 10.0 126 13.2 14.1 94 Larsen Creek 9000 8.5 8.6 99 11.5 -M * South Pass 9040 10.5 10.4 101 9.2 12.5 74 ----- ----- Basin Index (%) 109 84 LOWER N. PLATTE Casper Mtn. 7900 10.6 9.2 115 8.7 10.3 84 Laprele Creek 8375 8.9 6.8 131 9.6 8.6 112 Reno Hill 8400 10.7 9.0 119 11.6 10.3 113 Windy Peak 7900 6.5 5.2 125 6.8 7.3 93 ----- ----- Basin Index (%) 122 101 LARAMIE RIVER Brooklyn Lake 10240 16.3 14.1 116 17.8 14.8 120 Cinnabar Park 9574 14.9 16.0 93 17.3 18.5 94 Crow Creek 8330 2.9 6.5 45 6.6 7.3 90 Deadman Hill 10220 13.4 11.6 116 12.5 11.7 107 Rawah 9020 8.8 7.5 117 11.5 10.0 115 Roach 9700 11.3 11.7 97 14.1 13.5 104 Windy Peak 7900 6.5 5.2 125 6.8 7.3 93 ----- ----- Basin Index (%) 102 104 S. PLATTE Black Mountain 8920 6.9 -M * 7.9 -M * Crow Creek 8330 2.9 6.5 45 6.6 7.3 90 Deadman Hill 10220 13.4 11.6 116 12.5 11.7 107 ----- ----- Basin Index (%) 90 101 LITTLE SNAKE RIVER Battle Mountain 7440 10.2 8.8 116 15.2 11.2 136 Divide Peak 8880 14.4 14.3 101 17.3 15.7 110 Elk River 8700 14.3 13.9 103 13.7 14.8 93 Little Snake River 8915 19.9 18.5 108 28.5 23.5 121 Old Battle 10000 25.6 22.4 114 26.7 25.9 103 Sage Creek Basin 7850 13.3 10.0 133 13.1 11.1 118 Sandstone RS 8150 12.3 10.0 123 13.4 13.9 96 Whiskey Park 8950 21.1 19.5 108 24.2 20.8 116 ----- ----- Basin Index (%) 112 111 UPPER GREEN RIVER Big Sandy Opening 9080 10.3 9.1 113 11.1 9.6 116 Blind Bull Sum 8650 15.6 16.5 95 13.0 14.8 88 East Rim Divide 7930 7.9 7.4 107 8.2 8.7 94 Elkhart Park G.S. 9400 8.6 8.7 99 9.8 9.6 102 Gros Ventre Summit 8750 6.9 9.1 76 8.1 9.3 87 Gunsight Pass 9820 9.5 9.8 97 11.7 10.1 116 Indian Creek 9425 16.0 16.8 95 12.8 16.4 78 Kendall R.S. 7740 8.2 9.1 90 8.7 10.6 82 Loomis Park 8240 11.5 10.7 107 12.5 12.9 97 New Fork Lake 8340 7.2 7.6 95 6.8 8.0 85 Pocket Creek 9360 10.7 -M * 11.7 -M * Snyder Basin 8060 8.7 9.1 96 10.5 10.6 99 Spring Creek Divide 9000 16.9 16.6 102 17.9 17.8 101 Triple Peak 8500 16.8 15.6 108 18.8 18.3 103 ----- ----- Basin Index (%) 99 96 LOWER GREEN RIVER Blacks Fork Jct 8869 6.3 -M * 9.5 -M * Buck Pasture 9632 11.6 -M * 14.7 -M * EF Blacks Fork GS 9360 8.9 -M * 7.7 -M * Hams Fork 7840 8.0 8.5 94 8.5 8.4 101 Hewinta 9500 7.5 7.0 107 10.4 9.9 105 Hickerson Park 9122 5.8 5.2 112 7.9 7.0 113 Hole-in-Rock 9168 4.3 4.8 90 7.2 6.6 109 Indian Creek 9425 16.0 16.8 95 12.8 16.4 78 Kelley R.S. 8180 10.5 10.8 97 11.1 13.4 83 Spirit Lk 10235 11.5 -M * 11.8 -M * Steel Creek Park 10158 11.3 10.4 109 13.3 11.4 117 ----- ----- Basin Index (%) 100 97 UPPER BEAR RIVER Bear River RS 8777 8.1 -M * 11.1 -M * Bug Lake 7987 16.0 13.4 119 17.3 14.3 121 Burts Miller Ranch 8000 5.3 -M * 6.4 -M * Chalk Creek #1 9171 18.5 16.3 113 21.8 18.0 121 Hayden Fork 9130 13.2 11.2 118 18.1 15.1 120 Kelley R.S. 8180 10.5 10.8 97 11.1 13.4 83 Lily Lake 9133 9.2 9.2 100 12.4 12.2 102 Monte Cristo 8932 22.8 19.1 119 23.0 18.8 122 Salt River Summit 7640 9.8 9.6 102 11.7 12.3 95 Spring Creek Divide 9000 16.9 16.6 102 17.9 17.8 101 ----- ----- Basin Index (%) 110 109 ----------------------------------------------------------------------------- -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.