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: MARCH 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 18.1 14.7 123 20.4 19.0 107 Black Bear 8170 40.6 32.5 125 39.7 34.5 115 Blind Bull Sum 8650 21.3 20.5 104 17.0 17.6 97 Cottonwood Creek 7670 19.2 19.9 96 22.5 21.9 103 East Rim Divide 7930 10.3 9.6 107 10.3 10.6 97 Grand Targhee 9260 39.1 33.0 118 29.2 27.1 108 Granite Creek 6770 18.8 15.0 125 19.6 18.2 108 Grassy Lake 7265 31.5 29.4 107 34.6 32.7 106 Gros Ventre Summit 8750 8.7 11.6 75 11.1 11.5 97 Gunsight Pass 9820 12.2 12.1 101 14.1 12.1 117 Lewis Lake Divide 7850 32.6 27.7 118 31.1 32.1 97 Phillips Bench 8200 27.1 22.4 121 29.8 25.3 118 Salt River Summit 7640 12.4 12.0 103 14.2 15.0 95 Snake River Station 6920 19.9 15.2 131 24.2 20.4 119 Spring Creek Divide 9000 21.1 21.1 100 21.7 21.5 101 Thumb Divide 7980 17.6 14.1 125 17.6 16.5 107 Togwotee Pass 9580 22.1 20.6 107 22.7 21.8 104 Two Ocean Plateau 9240 28.0 24.0 117 23.8 24.4 98 Willow Creek 8080 28.2 25.4 111 31.0 29.9 104 Younts Peak 8350 -M 13.4 * -M 14.1 * ----- ----- Basin Index (%) 113 105 MADISON-GALLATIN Black Bear 8170 40.6 32.5 125 39.7 34.5 115 Canyon 7870 12.6 11.8 107 14.6 14.6 100 Madison Plateau 7750 26.4 20.1 131 25.5 23.7 108 West Yellowstone 6700 14.1 9.9 142 16.0 12.8 125 Whiskey Creek 6800 18.5 14.2 130 19.0 18.2 104 ----- ----- Basin Index (%) 127 111 YELLOWSTONE Beartooth Lake 9360 18.4 19.3 95 17.3 17.7 98 Burnt Mtn 5880 7.9 4.6 172 12.2 10.9 112 Canyon 7870 12.6 11.8 107 14.6 14.6 100 Cole Creek 7850 14.3 12.0 119 -M 10.7 * Evening Star 9200 23.8 22.2 107 26.2 24.4 107 Fisher Creek 9100 28.3 28.2 100 31.1 28.5 109 Northeast Entrance 7350 10.0 9.0 111 12.2 11.0 111 Parker Peak 9400 21.7 17.6 123 21.6 15.7 138 Sylvan Lake 8420 19.7 18.2 108 24.7 20.0 124 Thumb Divide 7980 17.6 14.1 125 17.6 16.5 107 Two Ocean Plateau 9240 28.0 24.0 117 23.8 24.4 98 White Mill 8700 20.0 19.9 101 17.6 21.2 83 Wolverine 7650 11.7 8.9 131 11.5 11.0 105 Younts Peak 8350 -M 13.4 * -M 14.1 * ----- ----- Basin Index (%) 112 107 WIND RIVER Burroughs Creek 8750 9.8 -M * 11.6 -M * Castle Creek 8400 3.9 -M * 5.1 -M * Cold Springs 9630 6.3 6.3 100 6.5 8.6 76 Deer Park 9700 15.0 13.3 113 16.1 17.2 94 Hobbs Park 10100 12.8 11.8 108 9.8 11.1 88 Kirwin 9550 9.2 8.4 110 9.7 10.0 97 Little Warm 9370 7.7 9.2 84 7.5 11.2 67 Owl Creek 8975 4.5 4.6 98 5.0 5.0 100 South Pass 9040 12.6 13.8 91 10.6 15.4 69 St. Lawrence Alt 8620 4.0 6.1 66 7.5 7.5 100 Togwotee Pass 9580 22.1 20.6 107 22.7 21.8 104 Townsend Creek 8700 8.1 8.2 99 9.0 10.1 89 ----- ----- Basin Index (%) 100 89 BIGHORN BASIN Bald Mtn. 9380 15.6 16.5 95 11.5 14.9 77 Bear Trap Meadow 8200 7.6 5.1 149 6.4 7.1 90 Bone Springs Div 9350 11.9 14.1 84 10.5 13.4 78 Grave Springs 8550 7.5 8.1 93 8.5 9.0 94 Kirwin 9550 9.2 8.4 110 9.7 10.0 97 Marquette 8760 6.5 -M * 7.9 -M * Middle Powder 7760 8.5 9.8 87 -M 10.0 * Owl Creek 8975 4.5 4.6 98 5.0 5.0 100 Powder River Pass 9480 9.0 9.2 98 8.5 10.8 79 Shell Creek 9580 12.1 12.8 95 10.5 11.9 88 Timber Creek 7950 3.2 4.2 76 5.1 6.1 84 ----- ----- Basin Index (%) 96 86 SHOSHONE RIVER Blackwater 9780 21.3 20.8 102 21.7 18.1 120 Evening Star 9200 23.8 22.2 107 26.2 24.4 107 Marquette 8760 6.5 -M * 7.9 -M * Sylvan Lake 8420 19.7 18.2 108 24.7 20.0 124 Sylvan Road 7120 11.4 10.4 110 15.1 15.1 100 Younts Peak 8350 -M 13.4 * -M 14.1 * ----- ----- Basin Index (%) 106 113 POWDER RIVER Bear Trap Meadow 8200 7.6 5.1 149 6.4 7.1 90 Cloud Peak Reservoir 9860 10.7 12.9 83 9.7 11.2 87 Grave Springs 8550 7.5 8.1 93 8.5 9.0 94 Hansen Sawmill 8360 4.9 5.7 86 6.4 7.1 90 Middle Powder 7760 8.5 9.8 87 -M 10.0 * Powder River Pass 9480 9.0 9.2 98 8.5 10.8 79 Soldier Park 8720 3.8 -M * 6.2 -M * ----- ----- Basin Index (%) 95 87 TONGUE RIVER Big Goose 7990 7.3 7.8 94 9.1 9.2 99 Bone Springs Div 9350 11.9 14.1 84 10.5 13.4 78 Burgess Junction 7880 7.6 9.5 80 7.8 10.5 74 Dome Lake 8880 7.9 10.2 77 7.2 11.5 63 Little Goose 8870 8.5 -M * 7.1 -M * Sucker Creek 8880 9.9 10.9 91 9.2 12.2 75 Tie Creek 6870 4.5 5.0 90 8.9 9.8 91 ----- ----- Basin Index (%) 85 79 BELLE FOURCHE Blind Park 6890 8.8 7.2 122 7.1 10.5 68 Cole Canyon 5910 7.1 5.5 129 10.8 7.9 137 ----- ----- Basin Index (%) 125 97 CHEYENNE RIVER BASIN Blind Park 6890 8.8 7.2 122 7.1 10.5 68 North Rapid Creek 6130 7.5 6.5 115 6.6 8.6 77 ----- ----- Basin Index (%) 119 72 UPPER N. PLATTE Arapaho Ridge 10960 24.3 18.0 135 24.5 19.7 124 Blackhall Mtn 9820 31.0 -M * 31.2 -M * Columbine 9160 29.0 22.0 132 27.4 22.9 120 Divide Peak 8880 20.3 17.6 115 22.4 19.1 117 Joe Wright 10120 21.0 19.1 110 28.4 22.9 124 Laprele Creek 8375 12.6 9.1 138 13.0 10.8 120 Med Bow 10500 35.5 -M * 32.5 -M * Never Summer 10280 21.1 17.8 119 17.7 -M * North French Creek 10130 28.6 25.2 113 28.6 23.7 121 Old Battle 10000 34.6 26.3 132 31.4 31.4 100 Rawah 9020 14.6 9.4 155 16.7 12.2 137 Sage Creek Basin 7850 17.4 11.5 151 -M 12.9 * Sand Lake 10050 27.7 24.6 113 23.7 21.7 109 South Brush Creek 8440 11.6 11.1 105 11.7 13.3 88 Tower 10500 48.9 40.0 122 -M 35.8 * Webber Springs 9250 25.8 21.0 123 29.7 23.9 124 Whiskey Park 8950 30.0 24.3 123 31.5 25.0 126 Willow Creek Pass 9540 15.3 10.9 140 16.3 11.7 139 Zirkel 9340 32.7 25.7 127 35.8 25.5 140 ----- ----- Basin Index (%) 125 120 SWEETWATER Deer Park 9700 15.0 13.3 113 16.1 17.2 94 Larsen Creek 9000 10.4 11.2 93 13.5 -M * South Pass 9040 12.6 13.8 91 10.6 15.4 69 ----- ----- Basin Index (%) 99 82 LOWER N. PLATTE Casper Mtn. 7900 14.3 12.2 117 11.0 12.8 86 Laprele Creek 8375 12.6 9.1 138 13.0 10.8 120 Reno Hill 8400 14.9 11.9 125 15.6 13.0 120 Windy Peak 7900 10.4 7.1 146 10.5 9.1 115 ----- ----- Basin Index (%) 130 110 LARAMIE RIVER Brooklyn Lake 10240 23.1 17.7 131 24.3 18.5 131 Cinnabar Park 9574 19.9 18.0 111 22.1 21.4 103 Crow Creek 8330 5.7 6.9 83 9.6 8.9 108 Deadman Hill 10220 19.8 13.9 142 18.7 15.0 125 Rawah 9020 14.6 9.4 155 16.7 12.2 137 Roach 9700 17.2 14.0 123 20.4 16.9 121 Windy Peak 7900 10.4 7.1 146 10.5 9.1 115 ----- ----- Basin Index (%) 127 120 S. PLATTE Black Mountain 8920 11.1 -M * 12.0 -M * Crow Creek 8330 5.7 6.9 83 9.6 8.9 108 Deadman Hill 10220 19.8 13.9 142 18.7 15.0 125 ----- ----- Basin Index (%) 123 118 LITTLE SNAKE RIVER Battle Mountain 7440 13.5 11.4 118 15.6 13.6 115 Divide Peak 8880 20.3 17.6 115 22.4 19.1 117 Elk River 8700 20.5 17.4 118 18.8 18.0 104 Little Snake River 8915 28.4 21.1 135 35.9 26.5 135 Old Battle 10000 34.6 26.3 132 31.4 31.4 100 Sage Creek Basin 7850 17.4 11.5 151 -M 12.9 * Sandstone RS 8150 17.8 12.2 146 18.1 16.7 108 Whiskey Park 8950 30.0 24.3 123 31.5 25.0 126 ----- ----- Basin Index (%) 129 116 UPPER GREEN RIVER Big Sandy Opening 9080 12.7 11.7 109 13.5 11.8 114 Blind Bull Sum 8650 21.3 20.5 104 17.0 17.6 97 East Rim Divide 7930 10.3 9.6 107 10.3 10.6 97 Elkhart Park G.S. 9400 11.7 10.7 109 12.4 11.8 105 Gros Ventre Summit 8750 8.7 11.6 75 11.1 11.5 97 Gunsight Pass 9820 12.2 12.1 101 14.1 12.1 117 Indian Creek 9425 19.9 21.3 93 15.9 20.2 79 Kendall R.S. 7740 11.0 11.3 97 11.0 13.0 85 Loomis Park 8240 15.2 13.3 114 15.7 15.6 101 New Fork Lake 8340 9.1 9.3 98 8.6 9.7 89 Pocket Creek 9360 13.1 -M * 13.9 -M * Snider Basin 8060 11.0 11.0 100 12.5 12.8 98 Spring Creek Divide 9000 21.1 21.1 100 21.7 21.5 101 Triple Peak 8500 21.2 19.5 109 23.1 22.7 102 ----- ----- Basin Index (%) 101 98 LOWER GREEN RIVER Blacks Fork Jct 8869 8.9 -M * 11.5 -M * Buck Pasture 9632 14.0 -M * 16.6 -M * EF Blacks Fork GS 9360 11.1 -M * 9.4 -M * Hams Fork 7840 10.0 10.3 97 10.1 10.2 99 Hewinta 9500 11.6 9.9 117 12.8 12.3 104 Hickerson Park 9122 7.9 6.6 120 9.8 8.9 110 Hole-in-Rock 9168 6.3 6.6 95 9.2 8.3 111 Indian Creek 9425 19.9 21.3 93 15.9 20.2 79 Kelley R.S. 8180 -M 13.4 * -M 16.2 * Spirit Lk 10235 14.0 -M * 14.3 -M * Steel Creek Park 10158 14.0 13.4 104 16.1 14.3 113 ----- ----- Basin Index (%) 102 100 UPPER BEAR RIVER Bear River RS 8777 11.5 -M * 13.6 -M * Bug Lake 7987 21.8 16.7 131 21.1 17.4 121 Burts Miller Ranch 8000 8.0 -M * 7.8 -M * Chalk Creek #1 9171 23.5 21.2 111 26.1 22.2 118 Hayden Fork 9130 17.0 14.3 119 21.3 18.6 115 Kelley R.S. 8180 -M 13.4 * -M 16.2 * Lily Lake 9133 11.8 11.4 104 14.7 15.0 98 Monte Cristo 8932 29.4 24.4 120 28.2 23.1 122 Salt River Summit 7640 12.4 12.0 103 14.2 15.0 95 Spring Creek Divide 9000 21.1 21.1 100 21.7 21.5 101 ----- ----- Basin Index (%) 113 111 ----------------------------------------------------------------------------- -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.