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 TUESDAY: MARCH 12 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 18.1 13.8 131 20.2 18.3 110 Black Bear 8170 40.5 31.6 128 39.6 33.3 119 Blind Bull Sum 8650 21.0 19.6 107 16.9 17.0 99 Cottonwood Creek 7670 19.0 18.6 102 22.2 20.9 106 East Rim Divide 7930 10.2 9.5 107 10.4 10.2 102 Grand Targhee 9260 38.6 32.1 120 29.0 25.7 113 Granite Creek 6770 18.6 14.7 127 19.2 17.6 109 Grassy Lake 7265 31.3 27.7 113 34.4 31.4 110 Gros Ventre Summit 8750 8.7 10.9 80 10.8 11.0 98 Gunsight Pass 9820 12.1 11.6 104 14.0 11.7 120 Lewis Lake Divide 7850 32.7 26.7 122 30.8 30.9 100 Phillips Bench 8200 27.2 21.4 127 22.6 24.3 93 Salt River Summit 7640 12.2 11.3 108 13.9 14.3 97 Snake River Station 6920 19.8 15.2 130 24.0 19.7 122 Spring Creek Divide 9000 20.8 19.7 106 21.3 20.5 104 Thumb Divide 7980 17.4 13.3 131 16.3 15.8 103 Togwotee Pass 9580 22.0 19.6 112 22.6 20.8 109 Two Ocean Plateau 9240 27.7 23.2 119 21.9 23.4 94 Willow Creek 8080 27.4 24.2 113 30.5 28.7 106 Younts Peak 8350 -M 12.4 * -M 13.5 * ----- ----- Basin Index (%) 117 106 MADISON-GALLATIN Black Bear 8170 40.5 31.6 128 39.6 33.3 119 Canyon 7870 12.6 11.5 110 14.4 14.0 103 Madison Plateau 7750 26.3 19.4 136 25.4 22.9 111 West Yellowstone 6700 14.2 9.8 145 15.9 12.4 128 Whiskey Creek 6800 18.3 13.3 138 18.8 17.5 107 ----- ----- Basin Index (%) 131 114 YELLOWSTONE Beartooth Lake 9360 18.4 18.4 100 17.1 16.9 101 Burnt Mtn 5880 7.8 4.3 181 12.0 10.2 118 Canyon 7870 12.6 11.5 110 14.4 14.0 103 Cole Creek 7850 14.0 11.3 124 -M 10.0 * Evening Star 9200 23.8 21.1 113 25.7 23.5 109 Fisher Creek 9100 28.2 27.2 104 30.9 27.4 113 Northeast Entrance 7350 10.1 8.7 116 12.2 10.5 116 Parker Peak 9400 -M 16.8 * -M 15.0 * Sylvan Lake 8420 19.3 17.1 113 24.6 19.1 129 Thumb Divide 7980 17.4 13.3 131 16.3 15.8 103 Two Ocean Plateau 9240 27.7 23.2 119 21.9 23.4 94 White Mill 8700 20.0 19.3 104 17.5 20.3 86 Wolverine 7650 11.8 9.0 131 11.6 10.5 110 Younts Peak 8350 -M 12.4 * -M 13.5 * ----- ----- Basin Index (%) 114 107 WIND RIVER Burroughs Creek 8750 9.8 -M * 11.7 -M * Castle Creek 8400 3.8 -M * 5.1 -M * Cold Springs 9630 5.9 6.0 98 6.3 8.1 78 Deer Park 9700 14.6 12.2 120 15.8 16.3 97 Hobbs Park 10100 12.2 11.0 111 9.2 10.4 88 Kirwin 9550 9.1 7.9 115 9.5 9.4 101 Little Warm 9370 7.8 8.8 89 7.6 10.6 72 Owl Creek 8975 4.5 4.4 102 5.0 4.6 109 South Pass 9040 12.2 12.6 97 10.4 14.6 71 St. Lawrence Alt 8620 3.8 5.9 64 7.1 7.1 100 Togwotee Pass 9580 22.0 19.6 112 22.6 20.8 109 Townsend Creek 8700 7.7 7.4 104 8.4 9.4 89 ----- ----- Basin Index (%) 104 92 BIGHORN BASIN Bald Mtn. 9380 14.9 16.0 93 10.9 14.0 78 Bear Trap Meadow 8200 7.3 4.7 155 6.3 6.6 95 Bone Springs Div 9350 11.5 13.3 86 10.0 12.6 79 Grave Springs 8550 6.8 7.5 91 7.8 8.4 93 Kirwin 9550 9.1 7.9 115 9.5 9.4 101 Marquette 8760 6.2 -M * 7.6 -M * Middle Powder 7760 8.1 8.9 91 4.4 9.4 47 Owl Creek 8975 4.5 4.4 102 5.0 4.6 109 Powder River Pass 9480 8.9 8.6 103 8.3 10.2 81 Shell Creek 9580 12.0 12.3 98 10.2 11.2 91 Timber Creek 7950 3.3 4.1 80 5.1 5.6 91 ----- ----- Basin Index (%) 99 84 SHOSHONE RIVER Blackwater 9780 21.4 19.2 111 21.6 17.3 125 Evening Star 9200 23.8 21.1 113 25.7 23.5 109 Marquette 8760 6.2 -M * 7.6 -M * Sylvan Lake 8420 19.3 17.1 113 24.6 19.1 129 Sylvan Road 7120 11.7 10.0 117 15.0 14.6 103 Younts Peak 8350 -M 12.4 * -M 13.5 * ----- ----- Basin Index (%) 113 117 POWDER RIVER Bear Trap Meadow 8200 7.3 4.7 155 6.3 6.6 95 Cloud Peak Reservoir 9860 10.0 11.9 84 8.8 10.4 85 Grave Springs 8550 6.8 7.5 91 7.8 8.4 93 Hansen Sawmill 8360 4.7 5.2 90 6.3 6.6 95 Middle Powder 7760 8.1 8.9 91 4.4 9.4 47 Powder River Pass 9480 8.9 8.6 103 8.3 10.2 81 Soldier Park 8720 3.4 -M * 5.9 -M * ----- ----- Basin Index (%) 98 81 TONGUE RIVER Big Goose 7990 6.6 7.0 94 8.4 8.5 99 Bone Springs Div 9350 11.5 13.3 86 10.0 12.6 79 Burgess Junction 7880 7.0 9.3 75 7.5 9.8 77 Dome Lake 8880 7.4 9.4 79 6.7 10.7 63 Little Goose 8870 7.7 -M * 6.5 -M * Sucker Creek 8880 9.0 10.2 88 8.3 11.4 73 Tie Creek 6870 4.1 4.7 87 8.4 9.0 93 ----- ----- Basin Index (%) 85 80 BELLE FOURCHE Blind Park 6890 7.5 6.9 109 6.5 10.1 64 Cole Canyon 5910 5.9 5.1 116 9.8 7.4 132 ----- ----- Basin Index (%) 112 93 CHEYENNE RIVER BASIN Blind Park 6890 7.5 6.9 109 6.5 10.1 64 North Rapid Creek 6130 6.1 6.3 97 5.9 8.1 73 ----- ----- Basin Index (%) 103 68 UPPER N. PLATTE Arapaho Ridge 10960 22.6 17.8 127 22.7 18.9 120 Blackhall Mtn 9820 29.0 -M * 30.0 -M * Columbine 9160 27.2 21.2 128 26.2 21.9 120 Divide Peak 8880 18.1 17.0 106 20.5 18.1 113 Joe Wright 10120 19.5 18.5 105 27.0 21.6 125 Laprele Creek 8375 10.4 8.6 121 11.0 10.2 108 Med Bow 10500 33.3 -M * 30.4 -M * Never Summer 10280 19.8 17.1 116 16.6 -M * North French Creek 10130 26.6 23.3 114 26.5 22.6 117 Old Battle 10000 32.7 25.7 127 31.1 30.0 104 Rawah 9020 12.6 9.3 135 15.2 11.6 131 Sage Creek Basin 7850 16.2 11.7 138 15.7 12.5 126 Sand Lake 10050 24.9 22.8 109 21.1 20.5 103 South Brush Creek 8440 10.1 11.2 90 10.6 12.6 84 Tower 10500 48.3 38.4 126 -M 34.1 * Webber Springs 9250 23.6 20.2 117 27.6 22.8 121 Whiskey Park 8950 28.4 23.5 121 30.2 24.0 126 Willow Creek Pass 9540 13.7 10.3 133 15.1 11.1 136 Zirkel 9340 31.5 25.3 125 31.3 24.7 127 ----- ----- Basin Index (%) 120 117 SWEETWATER Deer Park 9700 14.6 12.2 120 15.8 16.3 97 Larsen Creek 9000 10.7 10.5 102 13.5 -M * South Pass 9040 12.2 12.6 97 10.4 14.6 71 ----- ----- Basin Index (%) 106 85 LOWER N. PLATTE Casper Mtn. 7900 11.5 11.6 99 9.5 12.1 79 Laprele Creek 8375 10.4 8.6 121 11.0 10.2 108 Reno Hill 8400 12.2 11.3 108 13.1 12.2 107 Windy Peak 7900 8.1 6.6 123 8.7 8.6 101 ----- ----- Basin Index (%) 111 98 LARAMIE RIVER Brooklyn Lake 10240 21.2 17.0 125 22.2 17.5 127 Cinnabar Park 9574 18.9 17.8 106 21.0 20.7 101 Crow Creek 8330 4.4 7.1 62 8.3 8.5 98 Deadman Hill 10220 17.8 13.1 136 16.5 14.1 117 Rawah 9020 12.6 9.3 135 15.2 11.6 131 Roach 9700 15.6 13.5 116 18.9 16.0 118 Windy Peak 7900 8.1 6.6 123 8.7 8.6 101 ----- ----- Basin Index (%) 117 114 S. PLATTE Black Mountain 8920 9.2 -M * 10.0 -M * Crow Creek 8330 4.4 7.1 62 8.3 8.5 98 Deadman Hill 10220 17.8 13.1 136 16.5 14.1 117 ----- ----- Basin Index (%) 110 110 LITTLE SNAKE RIVER Battle Mountain 7440 12.8 10.7 120 15.1 13.0 116 Divide Peak 8880 18.1 17.0 106 20.5 18.1 113 Elk River 8700 19.3 17.0 114 17.7 17.2 103 Little Snake River 8915 27.4 20.3 135 35.0 26.0 135 Old Battle 10000 32.7 25.7 127 31.1 30.0 104 Sage Creek Basin 7850 16.2 11.7 138 15.7 12.5 126 Sandstone RS 8150 16.6 11.8 141 17.2 16.0 108 Whiskey Park 8950 28.4 23.5 121 30.2 24.0 126 ----- ----- Basin Index (%) 125 116 UPPER GREEN RIVER Big Sandy Opening 9080 12.7 10.8 118 13.4 11.3 119 Blind Bull Sum 8650 21.0 19.6 107 16.9 17.0 99 East Rim Divide 7930 10.2 9.5 107 10.4 10.2 102 Elkhart Park G.S. 9400 11.6 10.2 114 12.3 11.3 109 Gros Ventre Summit 8750 8.7 10.9 80 10.8 11.0 98 Gunsight Pass 9820 12.1 11.6 104 14.0 11.7 120 Indian Creek 9425 19.7 20.4 97 15.7 19.1 82 Kendall R.S. 7740 10.7 10.6 101 11.1 12.5 89 Loomis Park 8240 15.0 12.8 117 15.7 15.0 105 New Fork Lake 8340 9.2 9.1 101 8.5 9.4 90 Pocket Creek 9360 13.2 -M * 13.9 -M * Snyder Basin 8060 10.8 10.7 101 12.5 12.2 102 Spring Creek Divide 9000 20.8 19.7 106 21.3 20.5 104 Triple Peak 8500 21.0 18.7 112 22.9 21.6 106 ----- ----- Basin Index (%) 105 101 LOWER GREEN RIVER Blacks Fork Jct 8869 8.1 -M * 11.1 -M * Buck Pasture 9632 13.5 -M * 16.2 -M * EF Blacks Fork GS 9360 10.8 -M * 9.0 -M * Hams Fork 7840 9.8 10.0 98 10.1 9.7 104 Hewinta 9500 10.1 8.7 116 12.4 11.6 107 Hickerson Park 9122 7.0 6.5 108 9.1 8.2 111 Hole-in-Rock 9168 5.8 6.2 94 8.7 7.7 113 Indian Creek 9425 19.7 20.4 97 15.7 19.1 82 Kelley R.S. 8180 12.8 12.8 100 13.3 15.5 86 Spirit Lk 10235 13.4 -M * 13.7 -M * Steel Creek Park 10158 13.1 12.7 103 15.4 13.4 115 ----- ----- Basin Index (%) 101 99 UPPER BEAR RIVER Bear River RS 8777 10.2 -M * 12.9 -M * Bug Lake 7987 20.8 16.3 128 20.6 16.6 124 Burts Miller Ranch 8000 7.0 -M * 7.4 -M * Chalk Creek #1 9171 22.1 20.2 109 25.9 21.0 123 Hayden Fork 9130 16.3 13.6 120 20.8 17.6 118 Kelley R.S. 8180 12.8 12.8 100 13.3 15.5 86 Lily Lake 9133 10.9 11.2 97 14.1 14.3 99 Monte Cristo 8932 28.4 23.0 123 -M 22.0 * Salt River Summit 7640 12.2 11.3 108 13.9 14.3 97 Spring Creek Divide 9000 20.8 19.7 106 21.3 20.5 104 ----- ----- Basin Index (%) 113 108 ----------------------------------------------------------------------------- -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.