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 1 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 17.2 13.5 127 19.1 17.2 111 Black Bear 8170 37.8 29.6 128 37.6 30.8 122 Blind Bull Sum 8650 19.4 17.9 108 15.8 16.0 99 Cottonwood Creek 7670 17.8 16.9 105 20.8 19.6 106 East Rim Divide 7930 9.5 8.1 117 9.8 9.6 102 Grand Targhee 9260 36.5 30.2 121 27.7 24.8 112 Granite Creek 6770 17.1 13.8 124 18.2 16.5 110 Grassy Lake 7265 28.9 26.2 110 31.7 29.4 108 Gros Ventre Summit 8750 8.5 9.7 88 10.1 10.1 100 Gunsight Pass 9820 11.4 10.6 108 13.3 10.9 122 Lewis Lake Divide 7850 30.4 25.2 121 30.3 28.7 106 Phillips Bench 8200 25.7 19.7 130 22.1 22.7 97 Salt River Summit 7640 11.1 10.6 105 13.0 13.4 97 Snake River Station 6920 18.0 14.2 127 22.6 18.7 121 Spring Creek Divide 9000 19.3 18.6 104 20.1 19.3 104 Thumb Divide 7980 16.1 12.3 131 15.9 14.6 109 Togwotee Pass 9580 21.1 17.7 119 20.9 19.4 108 Two Ocean Plateau 9240 26.3 21.6 122 21.2 21.6 98 Willow Creek 8080 24.9 22.2 112 28.6 26.8 107 Younts Peak 8350 -M 11.7 * -M 12.6 * ----- ----- Basin Index (%) 117 108 MADISON-GALLATIN Black Bear 8170 37.8 29.6 128 37.6 30.8 122 Canyon 7870 12.0 10.5 114 13.8 13.0 106 Madison Plateau 7750 24.7 17.8 139 24.1 21.2 114 West Yellowstone 6700 13.1 9.0 146 15.2 11.7 130 Whiskey Creek 6800 17.2 12.0 143 17.6 16.3 108 ----- ----- Basin Index (%) 133 116 YELLOWSTONE Beartooth Lake 9360 17.4 16.7 104 16.0 15.7 102 Burnt Mtn 5880 7.6 4.0 190 11.6 9.5 122 Canyon 7870 12.0 10.5 114 13.8 13.0 106 Cole Creek 7850 13.3 9.9 134 -M 9.1 * Evening Star 9200 22.5 19.1 118 24.6 22.1 111 Fisher Creek 9100 26.6 25.8 103 29.2 25.5 115 Northeast Entrance 7350 9.5 8.2 116 11.6 9.9 117 Parker Peak 9400 20.4 16.0 128 20.3 14.0 145 Sylvan Lake 8420 18.0 15.9 113 23.3 18.0 129 Thumb Divide 7980 16.1 12.3 131 15.9 14.6 109 Two Ocean Plateau 9240 26.3 21.6 122 21.2 21.6 98 White Mill 8700 18.6 18.3 102 16.3 18.9 86 Wolverine 7650 11.1 8.5 131 11.1 10.0 111 Younts Peak 8350 -M 11.7 * -M 12.6 * ----- ----- Basin Index (%) 117 111 WIND RIVER Burroughs Creek 8750 9.5 -M * 11.2 -M * Castle Creek 8400 3.7 -M * 5.0 -M * Cold Springs 9630 5.8 5.5 105 6.0 7.5 80 Deer Park 9700 14.0 10.8 130 15.0 15.3 98 Hobbs Park 10100 11.8 9.7 122 8.6 9.5 91 Kirwin 9550 8.9 7.0 127 9.2 8.8 105 Little Warm 9370 7.4 7.9 94 7.4 9.8 76 Owl Creek 8975 4.3 3.9 110 4.9 4.3 114 South Pass 9040 11.8 11.4 104 9.8 13.5 73 St. Lawrence Alt 8620 3.7 5.2 71 7.1 6.5 109 Togwotee Pass 9580 21.1 17.7 119 20.9 19.4 108 Townsend Creek 8700 7.5 6.5 115 8.3 8.6 97 ----- ----- Basin Index (%) 112 94 BIGHORN BASIN Bald Mtn. 9380 14.5 14.7 99 10.3 13.1 79 Bear Trap Meadow 8200 6.7 4.4 152 6.0 6.1 98 Bone Springs Div 9350 10.8 12.0 90 9.3 11.7 79 Grave Springs 8550 5.9 6.9 86 7.0 7.9 89 Kirwin 9550 8.9 7.0 127 9.2 8.8 105 Marquette 8760 5.8 -M * 7.2 -M * Middle Powder 7760 7.2 8.0 90 4.3 8.7 49 Owl Creek 8975 4.3 3.9 110 4.9 4.3 114 Powder River Pass 9480 8.3 8.0 104 7.9 9.6 82 Shell Creek 9580 11.4 11.6 98 9.9 10.7 93 Timber Creek 7950 3.0 3.7 81 4.9 5.3 92 ----- ----- Basin Index (%) 101 85 SHOSHONE RIVER Blackwater 9780 19.7 17.2 115 19.9 16.1 124 Evening Star 9200 22.5 19.1 118 24.6 22.1 111 Marquette 8760 5.8 -M * 7.2 -M * Sylvan Lake 8420 18.0 15.9 113 23.3 18.0 129 Sylvan Road 7120 10.8 9.4 115 14.0 13.9 101 Younts Peak 8350 -M 11.7 * -M 12.6 * ----- ----- Basin Index (%) 115 117 POWDER RIVER Bear Trap Meadow 8200 6.7 4.4 152 6.0 6.1 98 Cloud Peak Reservoir 9860 9.5 10.4 91 8.5 9.6 89 Grave Springs 8550 5.9 6.9 86 7.0 7.9 89 Hansen Sawmill 8360 4.4 4.7 94 5.9 6.1 97 Middle Powder 7760 7.2 8.0 90 4.3 8.7 49 Powder River Pass 9480 8.3 8.0 104 7.9 9.6 82 Soldier Park 8720 3.1 -M * 5.6 -M * ----- ----- Basin Index (%) 99 82 TONGUE RIVER Big Goose 7990 6.0 6.2 97 7.7 7.9 97 Bone Springs Div 9350 10.8 12.0 90 9.3 11.7 79 Burgess Junction 7880 6.5 8.3 78 7.1 9.0 79 Dome Lake 8880 6.7 8.7 77 6.3 10.0 63 Little Goose 8870 7.1 -M * 6.1 -M * Sucker Creek 8880 8.5 8.9 96 8.1 10.6 76 Tie Creek 6870 3.6 4.3 84 7.9 8.4 94 ----- ----- Basin Index (%) 87 81 BELLE FOURCHE Blind Park 6890 7.1 6.4 111 6.3 9.4 67 Cole Canyon 5910 5.4 5.0 108 9.4 7.1 132 ----- ----- Basin Index (%) 110 95 CHEYENNE RIVER BASIN Blind Park 6890 7.1 6.4 111 6.3 9.4 67 North Rapid Creek 6130 5.7 5.9 97 5.7 7.6 75 ----- ----- Basin Index (%) 104 71 UPPER N. PLATTE Arapaho Ridge 10960 18.9 16.7 113 19.5 17.7 110 Blackhall Mtn 9820 24.1 -M * 25.8 -M * Columbine 9160 21.7 19.8 110 22.3 20.3 110 Divide Peak 8880 15.8 15.8 100 18.4 16.8 110 Joe Wright 10120 15.0 16.6 90 22.6 19.9 114 Laprele Creek 8375 9.2 7.8 118 9.9 9.3 106 Med Bow 10500 28.3 -M * 26.4 -M * Never Summer 10280 16.0 16.2 99 14.0 -M * North French Creek 10130 22.3 21.1 106 23.0 21.1 109 Old Battle 10000 27.9 23.9 117 28.7 27.9 103 Rawah 9020 9.0 8.8 102 12.1 10.9 111 Sage Creek Basin 7850 14.5 10.6 137 14.2 11.7 121 Sand Lake 10050 21.3 21.2 100 17.6 18.9 93 South Brush Creek 8440 8.2 10.3 80 9.1 11.7 78 Tower 10500 39.6 36.3 109 34.6 31.8 109 Webber Springs 9250 19.9 18.7 106 24.0 21.1 114 Whiskey Park 8950 22.8 21.5 106 25.5 22.4 114 Willow Creek Pass 9540 11.0 9.5 116 12.8 10.4 123 Zirkel 9340 24.8 23.0 108 28.9 23.4 124 ----- ----- Basin Index (%) 107 109 SWEETWATER Deer Park 9700 14.0 10.8 130 15.0 15.3 98 Larsen Creek 9000 10.0 9.5 105 12.8 -M * South Pass 9040 11.8 11.4 104 9.8 13.5 73 ----- ----- Basin Index (%) 113 86 LOWER N. PLATTE Casper Mtn. 7900 10.7 10.2 105 9.2 11.1 83 Laprele Creek 8375 9.2 7.8 118 9.9 9.3 106 Reno Hill 8400 11.3 10.0 113 12.1 11.1 109 Windy Peak 7900 7.1 5.7 125 7.7 7.8 99 ----- ----- Basin Index (%) 114 99 LARAMIE RIVER Brooklyn Lake 10240 17.3 15.0 115 18.7 16.0 117 Cinnabar Park 9574 15.8 17.1 92 18.4 19.7 93 Crow Creek 8330 3.1 6.7 46 6.9 7.8 88 Deadman Hill 10220 14.2 12.4 115 13.1 12.7 103 Rawah 9020 9.0 8.8 102 12.1 10.9 111 Roach 9700 12.2 12.4 98 15.1 14.7 103 Windy Peak 7900 7.1 5.7 125 7.7 7.8 99 ----- ----- Basin Index (%) 101 103 S. PLATTE Black Mountain 8920 7.5 -M * 8.3 -M * Crow Creek 8330 3.1 6.7 46 6.9 7.8 88 Deadman Hill 10220 14.2 12.4 115 13.1 12.7 103 ----- ----- Basin Index (%) 91 98 LITTLE SNAKE RIVER Battle Mountain 7440 10.6 9.9 107 13.0 12.1 107 Divide Peak 8880 15.8 15.8 100 18.4 16.8 110 Elk River 8700 15.0 15.5 97 14.4 15.9 91 Little Snake River 8915 22.2 19.7 113 30.0 24.9 120 Old Battle 10000 27.9 23.9 117 28.7 27.9 103 Sage Creek Basin 7850 14.5 10.6 137 14.2 11.7 121 Sandstone RS 8150 13.6 10.4 131 14.5 15.0 97 Whiskey Park 8950 22.8 21.5 106 25.5 22.4 114 ----- ----- Basin Index (%) 112 108 UPPER GREEN RIVER Big Sandy Opening 9080 11.7 10.1 116 12.7 10.5 121 Blind Bull Sum 8650 19.4 17.9 108 15.8 16.0 99 East Rim Divide 7930 9.5 8.1 117 9.8 9.6 102 Elkhart Park G.S. 9400 10.8 9.4 115 11.4 10.5 109 Gros Ventre Summit 8750 8.5 9.7 88 10.1 10.1 100 Gunsight Pass 9820 11.4 10.6 108 13.3 10.9 122 Indian Creek 9425 17.7 19.0 93 14.3 17.8 80 Kendall R.S. 7740 10.0 9.7 103 10.5 11.7 90 Loomis Park 8240 13.9 11.7 119 14.8 14.0 106 New Fork Lake 8340 8.5 8.2 104 7.7 8.8 88 Pocket Creek 9360 12.2 -M * 13.1 -M * Snyder Basin 8060 10.0 9.6 104 11.6 11.5 101 Spring Creek Divide 9000 19.3 18.6 104 20.1 19.3 104 Triple Peak 8500 19.7 16.8 117 21.7 20.2 107 ----- ----- Basin Index (%) 107 102 LOWER GREEN RIVER Blacks Fork Jct 8869 6.9 -M * 9.8 -M * Buck Pasture 9632 11.8 -M * 14.5 -M * EF Blacks Fork GS 9360 9.3 -M * 8.0 -M * Hams Fork 7840 8.5 9.2 92 8.9 9.1 98 Hewinta 9500 8.2 7.9 104 11.0 10.8 102 Hickerson Park 9122 6.1 5.9 103 8.5 7.6 112 Hole-in-Rock 9168 4.8 5.6 86 7.9 7.1 111 Indian Creek 9425 17.7 19.0 93 14.3 17.8 80 Kelley R.S. 8180 11.3 12.1 93 11.9 14.6 82 Spirit Lk 10235 12.2 -M * 12.6 -M * Steel Creek Park 10158 11.5 11.5 100 13.6 12.4 110 ----- ----- Basin Index (%) 96 96 UPPER BEAR RIVER Bear River RS 8777 8.4 -M * 11.5 -M * Bug Lake 7987 18.0 14.8 122 18.6 15.5 120 Burts Miller Ranch 8000 5.5 -M * 6.8 -M * Chalk Creek #1 9171 19.1 18.3 104 23.2 19.4 120 Hayden Fork 9130 13.6 12.1 112 18.5 16.4 113 Kelley R.S. 8180 11.3 12.1 93 11.9 14.6 82 Lily Lake 9133 9.6 10.3 93 12.7 13.2 96 Monte Cristo 8932 24.4 21.0 116 24.0 20.5 117 Salt River Summit 7640 11.1 10.6 105 13.0 13.4 97 Spring Creek Divide 9000 19.3 18.6 104 20.1 19.3 104 ----- ----- Basin Index (%) 107 107 ----------------------------------------------------------------------------- -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.