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: FEBRUARY 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 13.7 12.8 107 15.7 15.7 100 Black Bear 8170 28.0 27.3 103 28.1 28.2 100 Blind Bull Sum 8650 15.7 16.3 96 13.1 14.6 90 Cottonwood Creek 7670 16.4 15.0 109 19.2 17.9 107 East Rim Divide 7930 7.9 7.4 107 8.2 8.6 95 Grand Targhee 9260 33.1 26.9 123 25.2 23.4 108 Granite Creek 6770 13.9 12.6 110 15.4 15.2 101 Grassy Lake 7265 22.9 24.3 94 26.4 27.2 97 Gros Ventre Summit 8750 6.8 9.0 76 8.0 9.2 87 Gunsight Pass 9820 9.5 9.6 99 11.6 10.1 115 Lewis Lake Divide 7850 22.3 23.5 95 25.6 26.4 97 Phillips Bench 8200 20.7 18.1 114 21.9 20.7 106 Salt River Summit 7640 9.8 9.5 103 11.7 12.2 96 Snake River Station 6920 13.8 13.3 104 18.5 17.3 107 Spring Creek Divide 9000 17.0 16.5 103 18.1 17.6 103 Thumb Divide 7980 11.7 10.9 107 12.8 13.5 95 Togwotee Pass 9580 17.6 16.6 106 18.3 17.8 103 Two Ocean Plateau 9240 20.4 19.7 104 17.3 19.7 88 Willow Creek 8080 21.2 19.8 107 25.2 24.4 103 Younts Peak 8350 -M 11.0 * -M 11.7 * ----- ----- Basin Index (%) 104 100 MADISON-GALLATIN Black Bear 8170 28.0 27.3 103 28.1 28.2 100 Canyon 7870 9.1 9.5 96 10.8 12.0 90 Madison Plateau 7750 17.3 15.9 109 17.8 19.2 93 West Yellowstone 6700 9.6 7.8 123 11.5 10.8 106 Whiskey Creek 6800 12.0 10.9 110 12.5 14.9 84 ----- ----- Basin Index (%) 106 95 YELLOWSTONE Beartooth Lake 9360 12.8 15.5 83 11.6 14.5 80 Burnt Mtn 5880 5.5 3.6 153 9.8 8.8 111 Canyon 7870 9.1 9.5 96 10.8 12.0 90 Cole Creek 7850 11.4 8.9 128 -M 8.4 * Evening Star 9200 18.2 17.8 102 20.8 20.4 102 Fisher Creek 9100 20.3 23.6 86 23.6 23.4 101 Northeast Entrance 7350 7.8 7.5 104 10.1 9.3 109 Parker Peak 9400 16.3 14.3 114 16.8 12.8 131 Sylvan Lake 8420 14.7 14.4 102 20.0 16.6 120 Thumb Divide 7980 11.7 10.9 107 12.8 13.5 95 Two Ocean Plateau 9240 20.4 19.7 104 17.3 19.7 88 White Mill 8700 15.0 16.4 91 13.2 17.5 75 Wolverine 7650 8.1 8.0 101 8.6 9.2 93 Younts Peak 8350 -M 11.0 * -M 11.7 * ----- ----- Basin Index (%) 101 99 WIND RIVER Burroughs Creek 8750 6.6 -M * 8.2 -M * Castle Creek 8400 2.9 -M * 4.2 -M * Cold Springs 9630 5.0 5.2 96 5.2 6.8 76 Deer Park 9700 12.5 9.9 126 13.2 14.1 94 Hobbs Park 10100 10.2 8.7 117 7.4 8.7 85 Kirwin 9550 6.6 6.2 106 6.8 8.1 84 Little Warm 9370 5.9 7.4 80 5.8 9.0 64 Owl Creek 8975 4.0 3.4 118 4.5 3.9 115 South Pass 9040 10.5 10.3 102 9.2 12.3 75 St. Lawrence Alt 8620 3.2 4.6 70 6.4 5.9 108 Togwotee Pass 9580 17.6 16.6 106 18.3 17.8 103 Townsend Creek 8700 6.9 5.9 117 7.5 8.0 94 ----- ----- Basin Index (%) 105 89 BIGHORN BASIN Bald Mtn. 9380 13.6 13.2 103 9.3 11.9 78 Bear Trap Meadow 8200 6.3 3.8 166 5.5 5.7 96 Bone Springs Div 9350 10.1 10.9 93 8.7 10.7 81 Grave Springs 8550 5.7 5.7 100 6.4 7.2 89 Kirwin 9550 6.6 6.2 106 6.8 8.1 84 Marquette 8760 5.5 -M * 7.1 -M * Middle Powder 7760 7.0 7.2 97 4.0 8.1 49 Owl Creek 8975 4.0 3.4 118 4.5 3.9 115 Powder River Pass 9480 8.1 7.3 111 7.2 8.8 82 Shell Creek 9580 10.7 10.2 105 9.2 9.7 95 Timber Creek 7950 2.9 3.1 94 4.7 4.9 96 ----- ----- Basin Index (%) 106 84 SHOSHONE RIVER Blackwater 9780 15.8 15.7 101 16.6 14.9 111 Evening Star 9200 18.2 17.8 102 20.8 20.4 102 Marquette 8760 5.5 -M * 7.1 -M * Sylvan Lake 8420 14.7 14.4 102 20.0 16.6 120 Sylvan Road 7120 8.8 8.7 101 11.8 13.1 90 Younts Peak 8350 -M 11.0 * -M 11.7 * ----- ----- Basin Index (%) 102 106 POWDER RIVER Bear Trap Meadow 8200 6.3 3.8 166 5.5 5.7 96 Cloud Peak Reservoir 9860 9.0 9.7 93 7.8 8.8 89 Grave Springs 8550 5.7 5.7 100 6.4 7.2 89 Hansen Sawmill 8360 3.9 4.3 91 5.5 5.5 100 Middle Powder 7760 7.0 7.2 97 4.0 8.1 49 Powder River Pass 9480 8.1 7.3 111 7.2 8.8 82 Soldier Park 8720 3.0 -M * 5.2 -M * ----- ----- Basin Index (%) 105 83 TONGUE RIVER Big Goose 7990 5.6 5.7 98 7.4 7.3 101 Bone Springs Div 9350 10.1 10.9 93 8.7 10.7 81 Burgess Junction 7880 6.2 7.5 83 6.6 8.3 80 Dome Lake 8880 6.1 7.9 77 5.8 9.2 63 Little Goose 8870 6.8 -M * 5.9 -M * Sucker Creek 8880 8.1 8.1 100 7.6 9.7 78 Tie Creek 6870 3.3 3.9 85 7.6 7.8 97 ----- ----- Basin Index (%) 90 82 BELLE FOURCHE Blind Park 6890 6.9 5.7 121 5.9 8.7 68 Cole Canyon 5910 5.3 4.5 118 8.6 6.6 130 ----- ----- Basin Index (%) 120 95 CHEYENNE RIVER BASIN Blind Park 6890 6.9 5.7 121 5.9 8.7 68 North Rapid Creek 6130 5.4 5.4 100 5.4 7.1 76 ----- ----- Basin Index (%) 111 72 UPPER N. PLATTE Arapaho Ridge 10960 17.8 14.9 119 18.3 16.2 113 Blackhall Mtn 9820 22.4 -M * 24.2 -M * Columbine 9160 20.4 17.5 117 21.0 18.7 112 Divide Peak 8880 14.5 14.1 103 17.2 15.6 110 Joe Wright 10120 14.4 14.8 97 21.9 18.1 121 Laprele Creek 8375 9.0 6.7 134 9.6 8.5 113 Med Bow 10500 26.3 -M * 25.1 -M * Never Summer 10280 15.3 14.2 108 13.4 -M * North French Creek 10130 20.9 19.3 108 21.9 19.1 115 Old Battle 10000 25.5 22.2 115 26.5 25.7 103 Rawah 9020 8.8 7.5 117 11.6 9.9 117 Sage Creek Basin 7850 13.4 9.8 137 13.2 11.0 120 Sand Lake 10050 19.8 18.7 106 16.4 17.2 95 South Brush Creek 8440 7.9 8.6 92 8.6 10.6 81 Tower 10500 38.0 32.8 116 33.5 29.1 115 Webber Springs 9250 18.2 16.8 108 24.6 19.3 127 Whiskey Park 8950 20.9 19.3 108 24.2 20.6 117 Willow Creek Pass 9540 10.2 8.6 119 12.0 9.4 128 Zirkel 9340 23.0 21.0 110 27.1 21.6 125 ----- ----- Basin Index (%) 112 114 SWEETWATER Deer Park 9700 12.5 9.9 126 13.2 14.1 94 Larsen Creek 9000 8.6 8.6 100 11.6 -M * South Pass 9040 10.5 10.3 102 9.2 12.3 75 ----- ----- Basin Index (%) 110 85 LOWER N. PLATTE Casper Mtn. 7900 10.6 9.0 118 8.7 10.2 85 Laprele Creek 8375 9.0 6.7 134 9.6 8.5 113 Reno Hill 8400 11.0 8.9 124 11.6 10.2 114 Windy Peak 7900 6.7 5.2 129 6.9 7.2 96 ----- ----- Basin Index (%) 125 102 LARAMIE RIVER Brooklyn Lake 10240 16.3 13.9 117 17.7 14.6 121 Cinnabar Park 9574 14.8 16.0 92 17.3 18.3 95 Crow Creek 8330 2.8 6.4 44 6.5 7.2 90 Deadman Hill 10220 13.4 11.5 117 12.6 11.6 109 Rawah 9020 8.8 7.5 117 11.6 9.9 117 Roach 9700 11.4 11.6 98 14.2 13.4 106 Windy Peak 7900 6.7 5.2 129 6.9 7.2 96 ----- ----- Basin Index (%) 103 106 S. PLATTE Black Mountain 8920 7.0 -M * 7.9 -M * Crow Creek 8330 2.8 6.4 44 6.5 7.2 90 Deadman Hill 10220 13.4 11.5 117 12.6 11.6 109 ----- ----- Basin Index (%) 91 102 LITTLE SNAKE RIVER Battle Mountain 7440 10.0 8.7 115 15.3 11.1 138 Divide Peak 8880 14.5 14.1 103 17.2 15.6 110 Elk River 8700 14.3 13.8 104 13.5 14.6 92 Little Snake River 8915 20.0 18.4 109 28.5 23.3 122 Old Battle 10000 25.5 22.2 115 26.5 25.7 103 Sage Creek Basin 7850 13.4 9.8 137 13.2 11.0 120 Sandstone RS 8150 12.3 9.9 124 13.3 13.8 96 Whiskey Park 8950 20.9 19.3 108 24.2 20.6 117 ----- ----- Basin Index (%) 113 112 UPPER GREEN RIVER Big Sandy Opening 9080 10.4 9.0 116 11.2 9.4 119 Blind Bull Sum 8650 15.7 16.3 96 13.1 14.6 90 East Rim Divide 7930 7.9 7.4 107 8.2 8.6 95 Elkhart Park G.S. 9400 8.7 8.6 101 9.9 9.5 104 Gros Ventre Summit 8750 6.8 9.0 76 8.0 9.2 87 Gunsight Pass 9820 9.5 9.6 99 11.6 10.1 115 Indian Creek 9425 16.0 16.6 96 12.9 16.1 80 Kendall R.S. 7740 8.3 9.0 92 8.7 10.5 83 Loomis Park 8240 11.6 10.6 109 12.5 12.7 98 New Fork Lake 8340 7.3 7.5 97 6.9 7.9 87 Pocket Creek 9360 10.9 -M * 11.8 -M * Snyder Basin 8060 8.8 9.0 98 10.6 10.5 101 Spring Creek Divide 9000 17.0 16.5 103 18.1 17.6 103 Triple Peak 8500 16.9 15.5 109 19.0 18.2 104 ----- ----- Basin Index (%) 100 97 LOWER GREEN RIVER Blacks Fork Jct 8869 6.3 -M * 9.4 -M * Buck Pasture 9632 11.7 -M * 14.7 -M * EF Blacks Fork GS 9360 8.9 -M * 7.8 -M * Hams Fork 7840 8.0 8.4 95 8.5 8.3 102 Hewinta 9500 7.5 7.0 107 10.3 9.9 104 Hickerson Park 9122 5.6 5.1 110 7.8 6.9 113 Hole-in-Rock 9168 4.2 4.8 88 7.2 6.5 111 Indian Creek 9425 16.0 16.6 96 12.9 16.1 80 Kelley R.S. 8180 10.6 10.7 99 11.2 13.2 85 Spirit Lk 10235 11.4 -M * 11.8 -M * Steel Creek Park 10158 11.2 10.3 109 13.2 11.2 118 ----- ----- Basin Index (%) 100 99 UPPER BEAR RIVER Bear River RS 8777 8.1 -M * 11.1 -M * Bug Lake 7987 16.0 13.3 120 17.3 14.1 123 Burts Miller Ranch 8000 5.3 -M * 6.4 -M * Chalk Creek #1 9171 18.5 16.1 115 21.8 17.8 122 Hayden Fork 9130 13.2 11.0 120 18.0 14.9 121 Kelley R.S. 8180 10.6 10.7 99 11.2 13.2 85 Lily Lake 9133 9.2 9.0 102 12.4 12.1 102 Monte Cristo 8932 22.9 18.9 121 23.0 18.6 124 Salt River Summit 7640 9.8 9.5 103 11.7 12.2 96 Spring Creek Divide 9000 17.0 16.5 103 18.1 17.6 103 ----- ----- Basin Index (%) 112 111 ----------------------------------------------------------------------------- -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.