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 WEDNESDAY: FEBRUARY 20 , 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 13.0 105 15.7 16.3 96 Black Bear 8170 28.3 27.8 102 28.1 29.0 97 Blind Bull Sum 8650 15.8 16.9 93 13.1 15.1 87 Cottonwood Creek 7670 16.3 15.5 105 19.0 18.4 103 East Rim Divide 7930 7.9 7.5 105 8.1 8.9 91 Grand Targhee 9260 33.6 27.6 122 25.3 23.7 107 Granite Creek 6770 13.8 13.0 106 15.4 15.6 99 Grassy Lake 7265 23.0 24.7 93 26.5 27.9 95 Gros Ventre Summit 8750 7.0 9.2 76 8.1 9.5 85 Gunsight Pass 9820 9.5 9.9 96 11.7 10.2 115 Lewis Lake Divide 7850 22.4 24.2 93 25.8 27.3 95 Phillips Bench 8200 20.6 18.6 111 21.8 21.3 102 Salt River Summit 7640 -M 9.8 * -M 12.6 * Snake River Station 6920 14.0 13.6 103 18.4 17.7 104 Spring Creek Divide 9000 17.0 17.0 100 17.9 18.2 98 Thumb Divide 7980 11.6 11.1 105 12.8 13.8 93 Togwotee Pass 9580 17.8 16.8 106 18.4 18.3 101 Two Ocean Plateau 9240 20.6 20.2 102 17.3 20.4 85 Willow Creek 8080 21.6 20.5 105 25.2 25.1 100 Younts Peak 8350 -M 11.1 * -M 12.0 * ----- ----- Basin Index (%) 102 98 MADISON-GALLATIN Black Bear 8170 28.3 27.8 102 28.1 29.0 97 Canyon 7870 9.1 9.8 93 10.8 12.4 87 Madison Plateau 7750 17.5 16.5 106 18.0 19.8 91 West Yellowstone 6700 9.7 8.1 120 11.3 11.0 103 Whiskey Creek 6800 12.0 11.3 106 12.5 15.3 82 ----- ----- Basin Index (%) 104 92 YELLOWSTONE Beartooth Lake 9360 12.8 15.7 82 11.5 14.9 77 Burnt Mtn 5880 5.5 3.8 145 9.6 8.9 108 Canyon 7870 9.1 9.8 93 10.8 12.4 87 Cole Creek 7850 11.4 8.9 128 -M 8.6 * Evening Star 9200 18.3 18.3 100 20.7 20.9 99 Fisher Creek 9100 20.3 24.4 83 23.6 24.0 98 Northeast Entrance 7350 7.9 7.5 105 10.1 9.4 107 Parker Peak 9400 16.2 14.7 110 16.8 13.2 127 Sylvan Lake 8420 14.9 14.9 100 20.0 17.0 118 Thumb Divide 7980 11.6 11.1 105 12.8 13.8 93 Two Ocean Plateau 9240 20.6 20.2 102 17.3 20.4 85 White Mill 8700 15.1 17.0 89 13.2 18.0 73 Wolverine 7650 8.1 8.2 99 8.5 9.4 90 Younts Peak 8350 -M 11.1 * -M 12.0 * ----- ----- Basin Index (%) 98 96 WIND RIVER Burroughs Creek 8750 6.5 -M * 8.0 -M * Castle Creek 8400 2.9 -M * 4.2 -M * Cold Springs 9630 4.9 5.3 92 5.2 7.0 74 Deer Park 9700 12.6 10.1 125 13.2 14.3 92 Hobbs Park 10100 10.0 9.0 111 7.5 8.9 84 Kirwin 9550 6.6 6.4 103 6.6 8.3 80 Little Warm 9370 5.9 7.6 78 5.4 9.3 58 Owl Creek 8975 4.0 3.5 114 4.4 4.0 110 South Pass 9040 10.5 10.6 99 9.2 12.7 72 St. Lawrence Alt 8620 3.0 4.8 62 6.3 6.1 103 Togwotee Pass 9580 17.8 16.8 106 18.4 18.3 101 Townsend Creek 8700 6.7 6.0 112 7.6 8.2 93 ----- ----- Basin Index (%) 102 86 BIGHORN BASIN Bald Mtn. 9380 13.7 13.7 100 9.2 12.2 75 Bear Trap Meadow 8200 6.2 3.9 159 5.3 5.8 91 Bone Springs Div 9350 10.2 11.2 91 8.5 11.0 77 Grave Springs 8550 5.6 5.9 95 6.4 7.4 86 Kirwin 9550 6.6 6.4 103 6.6 8.3 80 Marquette 8760 5.5 -M * 7.1 -M * Middle Powder 7760 7.0 7.4 95 3.8 8.2 46 Owl Creek 8975 4.0 3.5 114 4.4 4.0 110 Powder River Pass 9480 8.1 7.4 109 7.2 9.0 80 Shell Creek 9580 10.7 10.5 102 9.0 9.9 91 Timber Creek 7950 2.8 3.1 90 4.7 4.9 96 ----- ----- Basin Index (%) 103 81 SHOSHONE RIVER Blackwater 9780 15.8 16.2 98 16.6 15.2 109 Evening Star 9200 18.3 18.3 100 20.7 20.9 99 Marquette 8760 5.5 -M * 7.1 -M * Sylvan Lake 8420 14.9 14.9 100 20.0 17.0 118 Sylvan Road 7120 8.8 8.8 100 11.9 13.3 89 Younts Peak 8350 -M 11.1 * -M 12.0 * ----- ----- Basin Index (%) 99 104 POWDER RIVER Bear Trap Meadow 8200 6.2 3.9 159 5.3 5.8 91 Cloud Peak Reservoir 9860 9.0 9.9 91 7.4 9.0 82 Grave Springs 8550 5.6 5.9 95 6.4 7.4 86 Hansen Sawmill 8360 3.9 4.4 89 5.4 5.7 95 Middle Powder 7760 7.0 7.4 95 3.8 8.2 46 Powder River Pass 9480 8.1 7.4 109 7.2 9.0 80 Soldier Park 8720 2.7 -M * 5.0 -M * ----- ----- Basin Index (%) 102 79 TONGUE RIVER Big Goose 7990 5.4 5.9 92 7.3 7.5 97 Bone Springs Div 9350 10.2 11.2 91 8.5 11.0 77 Burgess Junction 7880 6.2 7.6 82 6.4 8.5 75 Dome Lake 8880 5.8 8.0 72 5.7 9.4 61 Little Goose 8870 6.8 -M * 5.9 -M * Sucker Creek 8880 8.1 8.2 99 7.2 9.9 73 Tie Creek 6870 3.2 4.1 78 7.0 7.9 89 ----- ----- Basin Index (%) 86 78 BELLE FOURCHE Blind Park 6890 7.1 5.8 122 6.2 8.9 70 Cole Canyon 5910 5.2 4.7 111 9.1 6.8 134 ----- ----- Basin Index (%) 117 97 CHEYENNE RIVER BASIN Blind Park 6890 7.1 5.8 122 6.2 8.9 70 North Rapid Creek 6130 5.4 5.6 96 5.5 7.2 76 ----- ----- Basin Index (%) 110 73 UPPER N. PLATTE Arapaho Ridge 10960 17.9 15.3 117 18.3 16.6 110 Blackhall Mtn 9820 22.7 -M * 24.0 -M * Columbine 9160 20.7 18.2 114 21.0 19.1 110 Divide Peak 8880 14.6 14.6 100 17.2 16.0 108 Joe Wright 10120 14.7 15.3 96 22.1 18.6 119 Laprele Creek 8375 8.9 7.0 127 9.6 8.8 109 Med Bow 10500 26.7 -M * 25.2 -M * Never Summer 10280 15.5 14.7 105 13.5 -M * North French Creek 10130 21.6 19.6 110 22.3 19.8 113 Old Battle 10000 25.8 22.8 113 26.5 26.4 100 Rawah 9020 9.0 7.7 117 11.7 10.1 116 Sage Creek Basin 7850 13.7 10.2 134 13.3 11.3 118 Sand Lake 10050 20.0 19.4 103 16.5 17.8 93 South Brush Creek 8440 8.0 9.1 88 8.7 10.9 80 Tower 10500 38.1 34.0 112 33.7 29.9 113 Webber Springs 9250 18.4 17.4 106 22.2 19.9 112 Whiskey Park 8950 21.5 19.8 109 23.8 21.1 113 Willow Creek Pass 9540 10.6 8.9 119 12.1 9.7 125 Zirkel 9340 23.2 21.7 107 27.2 22.2 123 ----- ----- Basin Index (%) 110 110 SWEETWATER Deer Park 9700 12.6 10.1 125 13.2 14.3 92 Larsen Creek 9000 8.5 8.8 97 11.5 -M * South Pass 9040 10.5 10.6 99 9.2 12.7 72 ----- ----- Basin Index (%) 107 83 LOWER N. PLATTE Casper Mtn. 7900 10.8 9.4 115 8.7 10.4 84 Laprele Creek 8375 8.9 7.0 127 9.6 8.8 109 Reno Hill 8400 10.9 9.2 118 11.5 10.5 110 Windy Peak 7900 6.6 5.4 122 6.8 7.4 92 ----- ----- Basin Index (%) 120 99 LARAMIE RIVER Brooklyn Lake 10240 16.5 14.3 115 17.9 15.0 119 Cinnabar Park 9574 15.1 16.2 93 17.4 18.9 92 Crow Creek 8330 3.0 6.6 45 6.7 7.4 91 Deadman Hill 10220 13.5 11.8 114 12.6 11.9 106 Rawah 9020 9.0 7.7 117 11.7 10.1 116 Roach 9700 11.5 11.9 97 14.2 13.8 103 Windy Peak 7900 6.6 5.4 122 6.8 7.4 92 ----- ----- Basin Index (%) 102 103 S. PLATTE Black Mountain 8920 7.0 -M * -M -M * Crow Creek 8330 3.0 6.6 45 6.7 7.4 91 Deadman Hill 10220 13.5 11.8 114 12.6 11.9 106 ----- ----- Basin Index (%) 90 100 LITTLE SNAKE RIVER Battle Mountain 7440 10.4 8.9 117 12.2 11.4 107 Divide Peak 8880 14.6 14.6 100 17.2 16.0 108 Elk River 8700 14.6 14.1 104 13.8 15.1 91 Little Snake River 8915 20.2 18.8 107 -M 24.1 * Old Battle 10000 25.8 22.8 113 26.5 26.4 100 Sage Creek Basin 7850 13.7 10.2 134 13.3 11.3 118 Sandstone RS 8150 12.5 10.2 123 13.5 14.2 95 Whiskey Park 8950 21.5 19.8 109 23.8 21.1 113 ----- ----- Basin Index (%) 112 104 UPPER GREEN RIVER Big Sandy Opening 9080 10.3 9.3 111 11.1 9.8 113 Blind Bull Sum 8650 15.8 16.9 93 13.1 15.1 87 East Rim Divide 7930 7.9 7.5 105 8.1 8.9 91 Elkhart Park G.S. 9400 8.7 8.8 99 10.0 9.8 102 Gros Ventre Summit 8750 7.0 9.2 76 8.1 9.5 85 Gunsight Pass 9820 9.5 9.9 96 11.7 10.2 115 Indian Creek 9425 16.1 17.2 94 13.0 16.7 78 Kendall R.S. 7740 8.1 9.2 88 8.7 10.9 80 Loomis Park 8240 -M 10.9 * -M 13.2 * New Fork Lake 8340 7.2 7.6 95 6.8 8.2 83 Pocket Creek 9360 10.7 -M * 11.7 -M * Snyder Basin 8060 8.8 9.1 97 10.6 10.8 98 Spring Creek Divide 9000 17.0 17.0 100 17.9 18.2 98 Triple Peak 8500 17.0 15.8 108 19.0 18.8 101 ----- ----- Basin Index (%) 97 94 LOWER GREEN RIVER Blacks Fork Jct 8869 6.3 -M * 9.5 -M * Buck Pasture 9632 -M -M * -M -M * EF Blacks Fork GS 9360 9.0 -M * 7.7 -M * Hams Fork 7840 8.0 8.6 93 8.5 8.6 99 Hewinta 9500 7.6 7.2 106 10.5 10.1 104 Hickerson Park 9122 5.8 5.3 109 7.9 7.1 111 Hole-in-Rock 9168 4.3 5.0 86 7.3 6.7 109 Indian Creek 9425 16.1 17.2 94 13.0 16.7 78 Kelley R.S. 8180 10.5 11.0 95 11.2 13.7 82 Spirit Lk 10235 -M -M * -M -M * Steel Creek Park 10158 11.2 10.6 106 13.3 11.6 115 ----- ----- Basin Index (%) 98 96 UPPER BEAR RIVER Bear River RS 8777 8.2 -M * 11.1 -M * Bug Lake 7987 16.2 13.7 118 17.3 14.6 118 Burts Miller Ranch 8000 5.1 -M * 6.4 -M * Chalk Creek #1 9171 18.6 16.8 111 21.8 18.4 118 Hayden Fork 9130 13.3 11.3 118 18.0 15.4 117 Kelley R.S. 8180 10.5 11.0 95 11.2 13.7 82 Lily Lake 9133 9.3 9.4 99 12.5 12.5 100 Monte Cristo 8932 23.0 19.4 119 23.1 19.3 120 Salt River Summit 7640 -M 9.8 * -M 12.6 * Spring Creek Divide 9000 17.0 17.0 100 17.9 18.2 98 ----- ----- Basin Index (%) 109 109 ----------------------------------------------------------------------------- -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.