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 THURSDAY: FEBRUARY 28 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 16.9 13.4 126 18.8 17.1 110 Black Bear 8170 36.7 29.2 126 36.6 30.6 120 Blind Bull Sum 8650 18.3 17.6 104 15.1 15.9 95 Cottonwood Creek 7670 17.1 16.6 103 20.0 19.5 103 East Rim Divide 7930 9.0 8.0 112 9.3 9.5 98 Grand Targhee 9260 35.9 29.7 121 27.4 24.7 111 Granite Creek 6770 16.2 13.6 119 17.5 16.4 107 Grassy Lake 7265 28.5 25.9 110 31.4 29.3 107 Gros Ventre Summit 8750 8.2 9.6 85 9.7 10.0 97 Gunsight Pass 9820 11.0 10.5 105 13.0 10.8 120 Lewis Lake Divide 7850 29.9 25.1 119 30.2 28.6 106 Phillips Bench 8200 -M 19.5 * -M 22.6 * Salt River Summit 7640 -M 10.5 * -M 13.4 * Snake River Station 6920 17.6 14.1 125 22.3 18.5 121 Spring Creek Divide 9000 18.7 18.3 102 19.6 19.1 103 Thumb Divide 7980 15.6 12.1 129 15.7 14.5 108 Togwotee Pass 9580 20.7 17.5 118 20.7 19.3 107 Two Ocean Plateau 9240 25.7 21.4 120 20.9 21.5 97 Willow Creek 8080 -M 22.1 * -M 26.7 * Younts Peak 8350 -M 11.6 * -M 12.6 * ----- ----- Basin Index (%) 115 108 MADISON-GALLATIN Black Bear 8170 36.7 29.2 126 36.6 30.6 120 Canyon 7870 11.6 10.4 112 13.4 13.0 103 Madison Plateau 7750 24.2 17.7 137 23.6 21.1 112 West Yellowstone 6700 12.8 8.9 144 14.5 11.6 125 Whiskey Creek 6800 16.8 12.0 140 17.2 16.2 106 ----- ----- Basin Index (%) 131 114 YELLOWSTONE Beartooth Lake 9360 16.5 16.4 101 15.3 15.6 98 Burnt Mtn 5880 7.0 4.0 175 11.1 9.2 121 Canyon 7870 11.6 10.4 112 13.4 13.0 103 Cole Creek 7850 12.8 9.6 133 -M 9.0 * Evening Star 9200 22.1 18.9 117 24.3 22.0 110 Fisher Creek 9100 25.9 25.5 102 28.6 25.4 113 Northeast Entrance 7350 9.1 8.0 114 11.2 9.8 114 Parker Peak 9400 20.1 15.9 126 -M 14.0 * Sylvan Lake 8420 17.6 15.7 112 22.9 17.9 128 Thumb Divide 7980 15.6 12.1 129 15.7 14.5 108 Two Ocean Plateau 9240 25.7 21.4 120 20.9 21.5 97 White Mill 8700 18.2 18.1 101 16.0 18.8 85 Wolverine 7650 10.6 8.5 125 10.9 9.9 110 Younts Peak 8350 -M 11.6 * -M 12.6 * ----- ----- Basin Index (%) 115 107 WIND RIVER Burroughs Creek 8750 9.3 -M * 11.0 -M * Castle Creek 8400 3.7 -M * 4.9 -M * Cold Springs 9630 5.5 5.4 102 5.9 7.4 80 Deer Park 9700 13.6 10.8 126 14.7 15.1 97 Hobbs Park 10100 11.3 9.5 119 8.5 9.4 90 Kirwin 9550 8.8 6.9 128 9.1 8.7 105 Little Warm 9370 7.0 7.8 90 7.2 9.8 73 Owl Creek 8975 4.3 3.9 110 4.9 4.3 114 South Pass 9040 11.5 11.3 102 9.7 13.3 73 St. Lawrence Alt 8620 3.7 5.0 74 7.0 6.4 109 Togwotee Pass 9580 20.7 17.5 118 20.7 19.3 107 Townsend Creek 8700 7.5 6.3 119 8.3 8.5 98 ----- ----- Basin Index (%) 111 94 BIGHORN BASIN Bald Mtn. 9380 14.3 14.5 99 10.3 13.0 79 Bear Trap Meadow 8200 6.7 4.3 156 5.9 6.1 97 Bone Springs Div 9350 10.7 11.7 91 9.3 11.7 79 Grave Springs 8550 5.9 6.7 88 6.9 7.8 88 Kirwin 9550 8.8 6.9 128 9.1 8.7 105 Marquette 8760 5.9 -M * 7.3 -M * Middle Powder 7760 7.2 7.9 91 4.2 8.7 48 Owl Creek 8975 4.3 3.9 110 4.9 4.3 114 Powder River Pass 9480 8.3 7.9 105 7.9 9.5 83 Shell Creek 9580 11.3 11.4 99 9.8 10.5 93 Timber Creek 7950 3.1 3.4 91 4.8 5.2 92 ----- ----- Basin Index (%) 103 85 SHOSHONE RIVER Blackwater 9780 19.3 17.0 114 19.6 16.0 122 Evening Star 9200 22.1 18.9 117 24.3 22.0 110 Marquette 8760 5.9 -M * 7.3 -M * Sylvan Lake 8420 17.6 15.7 112 22.9 17.9 128 Sylvan Road 7120 10.4 9.3 112 13.7 13.8 99 Younts Peak 8350 -M 11.6 * -M 12.6 * ----- ----- Basin Index (%) 114 115 POWDER RIVER Bear Trap Meadow 8200 6.7 4.3 156 5.9 6.1 97 Cloud Peak Reservoir 9860 9.3 10.3 90 8.6 9.5 91 Grave Springs 8550 5.9 6.7 88 6.9 7.8 88 Hansen Sawmill 8360 4.5 4.6 98 5.9 6.0 98 Middle Powder 7760 7.2 7.9 91 4.2 8.7 48 Powder River Pass 9480 8.3 7.9 105 7.9 9.5 83 Soldier Park 8720 3.1 -M * 5.6 -M * ----- ----- Basin Index (%) 100 83 TONGUE RIVER Big Goose 7990 6.0 6.1 98 8.0 7.7 104 Bone Springs Div 9350 10.7 11.7 91 9.3 11.7 79 Burgess Junction 7880 6.5 8.2 79 7.2 8.9 81 Dome Lake 8880 6.7 8.5 79 6.3 9.9 64 Little Goose 8870 7.1 -M * 6.1 -M * Sucker Creek 8880 8.5 8.8 97 8.1 10.5 77 Tie Creek 6870 3.7 4.2 88 8.0 8.2 98 ----- ----- Basin Index (%) 89 82 BELLE FOURCHE Blind Park 6890 7.0 6.4 109 6.3 9.3 68 Cole Canyon 5910 5.3 5.0 106 9.3 7.0 133 ----- ----- Basin Index (%) 108 96 CHEYENNE RIVER BASIN Blind Park 6890 7.0 6.4 109 6.3 9.3 68 North Rapid Creek 6130 5.7 5.8 98 5.7 7.5 76 ----- ----- Basin Index (%) 104 71 UPPER N. PLATTE Arapaho Ridge 10960 18.7 16.4 114 19.2 17.5 110 Blackhall Mtn 9820 23.6 -M * 25.4 -M * Columbine 9160 21.5 19.6 110 22.1 20.2 109 Divide Peak 8880 15.4 15.5 99 18.1 16.7 108 Joe Wright 10120 14.9 16.4 91 22.4 19.8 113 Laprele Creek 8375 9.2 7.7 119 9.9 9.2 108 Med Bow 10500 27.9 -M * 26.2 -M * Never Summer 10280 16.0 16.0 100 14.0 -M * North French Creek 10130 22.0 20.9 105 22.9 20.9 110 Old Battle 10000 27.1 23.8 114 28.0 27.7 101 Rawah 9020 9.0 8.6 105 12.0 10.8 111 Sage Creek Basin 7850 14.2 10.5 135 14.0 11.6 121 Sand Lake 10050 20.9 21.0 100 17.4 18.7 93 South Brush Creek 8440 8.1 10.1 80 9.1 11.7 78 Tower 10500 39.2 35.8 109 34.5 31.6 109 Webber Springs 9250 19.1 18.5 103 23.2 21.0 110 Whiskey Park 8950 22.3 21.2 105 25.1 22.2 113 Willow Creek Pass 9540 10.8 9.4 115 12.8 10.2 125 Zirkel 9340 24.2 22.8 106 28.2 23.3 121 ----- ----- Basin Index (%) 106 109 SWEETWATER Deer Park 9700 13.6 10.8 126 14.7 15.1 97 Larsen Creek 9000 9.6 9.4 102 12.4 -M * South Pass 9040 11.5 11.3 102 9.7 13.3 73 ----- ----- Basin Index (%) 110 86 LOWER N. PLATTE Casper Mtn. 7900 10.7 10.0 107 9.1 11.0 83 Laprele Creek 8375 9.2 7.7 119 9.9 9.2 108 Reno Hill 8400 11.2 9.8 114 12.1 11.0 110 Windy Peak 7900 7.1 5.7 125 7.6 7.7 99 ----- ----- Basin Index (%) 115 99 LARAMIE RIVER Brooklyn Lake 10240 17.0 14.8 115 18.6 15.9 117 Cinnabar Park 9574 15.6 16.9 92 18.1 19.6 92 Crow Creek 8330 3.1 6.7 46 6.8 7.7 88 Deadman Hill 10220 13.9 12.4 112 13.0 12.6 103 Rawah 9020 9.0 8.6 105 12.0 10.8 111 Roach 9700 11.9 12.3 97 14.8 14.6 101 Windy Peak 7900 7.1 5.7 125 7.6 7.7 99 ----- ----- Basin Index (%) 100 102 S. PLATTE Black Mountain 8920 7.3 -M * 8.1 -M * Crow Creek 8330 3.1 6.7 46 6.8 7.7 88 Deadman Hill 10220 13.9 12.4 112 13.0 12.6 103 ----- ----- Basin Index (%) 89 98 LITTLE SNAKE RIVER Battle Mountain 7440 10.5 9.8 107 12.9 12.1 107 Divide Peak 8880 15.4 15.5 99 18.1 16.7 108 Elk River 8700 14.7 15.2 97 14.3 15.8 91 Little Snake River 8915 21.5 19.6 110 29.9 24.9 120 Old Battle 10000 27.1 23.8 114 28.0 27.7 101 Sage Creek Basin 7850 14.2 10.5 135 14.0 11.6 121 Sandstone RS 8150 13.2 10.3 128 14.3 15.0 95 Whiskey Park 8950 22.3 21.2 105 25.1 22.2 113 ----- ----- Basin Index (%) 110 107 UPPER GREEN RIVER Big Sandy Opening 9080 11.3 9.9 114 12.2 10.4 117 Blind Bull Sum 8650 18.3 17.6 104 15.1 15.9 95 East Rim Divide 7930 9.0 8.0 112 9.3 9.5 98 Elkhart Park G.S. 9400 10.2 9.3 110 10.9 10.4 105 Gros Ventre Summit 8750 8.2 9.6 85 9.7 10.0 97 Gunsight Pass 9820 11.0 10.5 105 13.0 10.8 120 Indian Creek 9425 17.4 18.7 93 14.1 17.7 80 Kendall R.S. 7740 9.4 9.7 97 10.0 11.6 86 Loomis Park 8240 -M 11.6 * -M 14.0 * New Fork Lake 8340 8.1 8.1 100 7.5 8.7 86 Pocket Creek 9360 11.7 -M * 12.7 -M * Snyder Basin 8060 9.7 9.5 102 11.4 11.5 99 Spring Creek Divide 9000 18.7 18.3 102 19.6 19.1 103 Triple Peak 8500 18.6 16.6 112 20.7 20.1 103 ----- ----- Basin Index (%) 103 99 LOWER GREEN RIVER Blacks Fork Jct 8869 6.7 -M * 9.6 -M * Buck Pasture 9632 11.7 -M * 14.5 -M * EF Blacks Fork GS 9360 9.2 -M * 7.8 -M * Hams Fork 7840 8.3 9.1 91 8.7 9.1 96 Hewinta 9500 7.8 7.8 100 10.7 10.7 100 Hickerson Park 9122 6.1 5.8 105 8.5 7.5 113 Hole-in-Rock 9168 4.9 5.5 89 7.8 7.0 111 Indian Creek 9425 17.4 18.7 93 14.1 17.7 80 Kelley R.S. 8180 11.2 12.0 93 11.8 14.5 81 Spirit Lk 10235 12.1 -M * 12.5 -M * Steel Creek Park 10158 11.5 11.4 101 13.5 12.3 110 ----- ----- Basin Index (%) 96 95 UPPER BEAR RIVER Bear River RS 8777 8.5 -M * 11.3 -M * Bug Lake 7987 17.8 14.6 122 18.3 15.4 119 Burts Miller Ranch 8000 5.3 -M * 6.7 -M * Chalk Creek #1 9171 18.8 18.1 104 23.1 19.3 120 Hayden Fork 9130 13.4 11.9 113 18.2 16.3 112 Kelley R.S. 8180 11.2 12.0 93 11.8 14.5 81 Lily Lake 9133 9.4 10.1 93 12.6 13.1 96 Monte Cristo 8932 24.0 20.6 117 23.8 20.4 117 Salt River Summit 7640 -M 10.5 * -M 13.4 * Spring Creek Divide 9000 18.7 18.3 102 19.6 19.1 103 ----- ----- Basin Index (%) 107 108 ----------------------------------------------------------------------------- -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.