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: MARCH 24 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 18.0 14.6 123 20.5 19.3 106 Black Bear 8170 40.9 33.4 122 40.2 35.1 115 Blind Bull Sum 8650 21.5 21.0 102 17.4 17.9 97 Cottonwood Creek 7670 19.1 20.4 94 22.7 22.5 101 East Rim Divide 7930 10.0 9.7 103 10.4 10.8 96 Grand Targhee 9260 39.5 33.6 118 29.5 27.5 107 Granite Creek 6770 18.8 14.8 127 19.6 18.4 107 Grassy Lake 7265 32.0 30.0 107 34.9 33.3 105 Gros Ventre Summit 8750 -M 11.9 * -M 11.7 * Gunsight Pass 9820 12.1 12.4 98 14.1 12.4 114 Lewis Lake Divide 7850 33.0 28.4 116 35.7 32.7 109 Phillips Bench 8200 27.5 22.9 120 30.1 25.8 117 Salt River Summit 7640 12.7 12.2 104 14.5 15.3 95 Snake River Station 6920 19.6 15.5 126 24.3 20.8 117 Spring Creek Divide 9000 21.2 21.8 97 21.8 21.9 100 Thumb Divide 7980 17.9 14.6 123 17.6 16.8 105 Togwotee Pass 9580 22.3 21.0 106 22.7 22.2 102 Two Ocean Plateau 9240 28.1 24.5 115 23.8 24.9 96 Willow Creek 8080 28.6 25.3 113 31.2 30.6 102 Younts Peak 8350 -M 13.7 * -M 14.4 * ----- ----- Basin Index (%) 112 106 MADISON-GALLATIN Black Bear 8170 40.9 33.4 122 40.2 35.1 115 Canyon 7870 12.7 11.9 107 14.7 14.8 99 Madison Plateau 7750 26.4 20.4 129 25.7 24.1 107 West Yellowstone 6700 13.7 10.0 137 16.1 12.9 125 Whiskey Creek 6800 18.6 14.4 129 19.2 18.4 104 ----- ----- Basin Index (%) 125 110 YELLOWSTONE Beartooth Lake 9360 18.6 20.0 93 17.4 18.1 96 Burnt Mtn 5880 7.9 4.8 165 12.1 11.2 108 Canyon 7870 12.7 11.9 107 14.7 14.8 99 Cole Creek 7850 14.1 12.4 114 -M 11.1 * Evening Star 9200 23.7 22.9 103 26.2 24.9 105 Fisher Creek 9100 28.5 28.4 100 31.1 29.2 107 Northeast Entrance 7350 9.6 9.4 102 12.2 11.2 109 Parker Peak 9400 21.7 17.9 121 21.8 16.0 136 Sylvan Lake 8420 19.1 18.5 103 24.7 20.3 122 Thumb Divide 7980 17.9 14.6 123 17.6 16.8 105 Two Ocean Plateau 9240 28.1 24.5 115 23.8 24.9 96 White Mill 8700 20.1 20.6 98 17.7 21.7 82 Wolverine 7650 11.2 8.9 126 11.6 11.2 104 Younts Peak 8350 -M 13.7 * -M 14.4 * ----- ----- Basin Index (%) 109 105 WIND RIVER Burroughs Creek 8750 9.9 -M * 11.9 -M * Castle Creek 8400 3.9 -M * 5.3 -M * Cold Springs 9630 6.2 6.6 94 6.7 8.8 76 Deer Park 9700 14.9 14.0 106 16.3 17.6 93 Hobbs Park 10100 13.0 12.4 105 9.9 11.4 87 Kirwin 9550 9.8 8.6 114 10.1 10.2 99 Little Warm 9370 7.9 9.6 82 7.9 11.5 69 Owl Creek 8975 4.4 4.7 94 5.1 5.2 98 South Pass 9040 12.7 14.4 88 10.6 15.7 68 St. Lawrence Alt 8620 4.2 6.4 66 7.6 7.8 97 Togwotee Pass 9580 22.3 21.0 106 22.7 22.2 102 Townsend Creek 8700 8.2 8.5 96 9.3 10.3 90 ----- ----- Basin Index (%) 98 88 BIGHORN BASIN Bald Mtn. 9380 15.6 16.7 93 11.7 15.2 77 Bear Trap Meadow 8200 7.4 5.2 142 6.7 7.4 91 Bone Springs Div 9350 12.0 14.3 84 10.6 13.7 77 Grave Springs 8550 7.6 8.3 92 8.6 9.3 92 Kirwin 9550 9.8 8.6 114 10.1 10.2 99 Marquette 8760 6.5 -M * 8.0 -M * Middle Powder 7760 8.4 10.3 82 4.6 10.4 44 Owl Creek 8975 4.4 4.7 94 5.1 5.2 98 Powder River Pass 9480 9.0 9.4 96 8.8 11.2 79 Shell Creek 9580 12.3 13.2 93 10.6 12.2 87 Timber Creek 7950 3.2 4.1 78 5.1 6.4 80 ----- ----- Basin Index (%) 95 81 SHOSHONE RIVER Blackwater 9780 21.4 21.1 101 21.8 18.5 118 Evening Star 9200 23.7 22.9 103 26.2 24.9 105 Marquette 8760 6.5 -M * 8.0 -M * Sylvan Lake 8420 19.1 18.5 103 24.7 20.3 122 Sylvan Road 7120 11.2 10.7 105 15.1 15.4 98 Younts Peak 8350 -M 13.7 * -M 14.4 * ----- ----- Basin Index (%) 103 111 POWDER RIVER Bear Trap Meadow 8200 7.4 5.2 142 6.7 7.4 91 Cloud Peak Reservoir 9860 11.0 13.3 83 10.0 11.6 86 Grave Springs 8550 7.6 8.3 92 8.6 9.3 92 Hansen Sawmill 8360 4.9 5.9 83 6.5 7.5 87 Middle Powder 7760 8.4 10.3 82 4.6 10.4 44 Powder River Pass 9480 9.0 9.4 96 8.8 11.2 79 Soldier Park 8720 3.8 -M * 6.2 -M * ----- ----- Basin Index (%) 92 79 TONGUE RIVER Big Goose 7990 7.4 8.1 91 9.1 9.5 96 Bone Springs Div 9350 12.0 14.3 84 10.6 13.7 77 Burgess Junction 7880 7.6 9.9 77 8.0 10.8 74 Dome Lake 8880 8.1 10.6 76 7.3 11.8 62 Little Goose 8870 8.5 -M * 7.1 -M * Sucker Creek 8880 9.9 11.1 89 9.4 12.6 75 Tie Creek 6870 4.4 5.2 85 8.9 10.0 89 ----- ----- Basin Index (%) 83 78 BELLE FOURCHE Blind Park 6890 7.8 7.1 110 7.2 10.6 68 Cole Canyon 5910 6.6 5.6 118 10.7 8.1 132 ----- ----- Basin Index (%) 113 96 CHEYENNE RIVER BASIN Blind Park 6890 7.8 7.1 110 7.2 10.6 68 North Rapid Creek 6130 6.9 6.7 103 6.6 8.8 75 ----- ----- Basin Index (%) 107 71 UPPER N. PLATTE Arapaho Ridge 10960 24.7 18.4 134 24.9 20.1 124 Blackhall Mtn 9820 31.4 -M * 31.6 -M * Columbine 9160 29.0 22.1 131 27.8 23.4 119 Divide Peak 8880 20.4 18.2 112 22.4 19.6 114 Joe Wright 10120 21.3 19.4 110 28.8 23.4 123 Laprele Creek 8375 12.6 9.3 135 13.1 11.1 118 Med Bow 10500 36.1 -M * 32.6 -M * Never Summer 10280 21.7 18.3 119 18.1 -M * North French Creek 10130 28.7 26.3 109 28.7 24.3 118 Old Battle 10000 34.8 27.3 127 35.4 32.1 110 Rawah 9020 14.9 9.8 152 17.1 12.5 137 Sage Creek Basin 7850 17.9 11.8 152 16.0 13.1 122 Sand Lake 10050 27.9 25.5 109 23.9 22.2 108 South Brush Creek 8440 11.6 11.5 101 11.9 13.7 87 Tower 10500 49.1 41.0 120 -M 36.4 * Webber Springs 9250 25.9 21.6 120 30.2 24.4 124 Whiskey Park 8950 30.4 24.6 124 31.5 25.5 124 Willow Creek Pass 9540 15.8 11.2 141 16.8 12.0 140 Zirkel 9340 32.9 25.5 129 36.1 25.8 140 ----- ----- Basin Index (%) 123 120 SWEETWATER Deer Park 9700 14.9 14.0 106 16.3 17.6 93 Larsen Creek 9000 10.4 11.5 90 13.6 -M * South Pass 9040 12.7 14.4 88 10.6 15.7 68 ----- ----- Basin Index (%) 95 81 LOWER N. PLATTE Casper Mtn. 7900 14.3 12.6 113 11.1 13.2 84 Laprele Creek 8375 12.6 9.3 135 13.1 11.1 118 Reno Hill 8400 15.0 12.4 121 15.6 13.4 116 Windy Peak 7900 10.7 7.5 143 11.0 9.4 117 ----- ----- Basin Index (%) 126 108 LARAMIE RIVER Brooklyn Lake 10240 23.4 18.2 129 24.4 19.0 128 Cinnabar Park 9574 19.7 18.9 104 22.5 21.8 103 Crow Creek 8330 6.0 6.9 87 9.9 9.4 105 Deadman Hill 10220 20.5 14.3 143 19.2 15.4 125 Rawah 9020 14.9 9.8 152 17.1 12.5 137 Roach 9700 17.4 14.3 122 20.6 17.2 120 Windy Peak 7900 10.7 7.5 143 11.0 9.4 117 ----- ----- Basin Index (%) 125 119 S. PLATTE Black Mountain 8920 11.5 -M * 12.4 -M * Crow Creek 8330 6.0 6.9 87 9.9 9.4 105 Deadman Hill 10220 20.5 14.3 143 19.2 15.4 125 ----- ----- Basin Index (%) 125 117 LITTLE SNAKE RIVER Battle Mountain 7440 13.2 11.2 118 15.8 13.9 114 Divide Peak 8880 20.4 18.2 112 22.4 19.6 114 Elk River 8700 20.4 17.5 117 18.9 18.3 103 Little Snake River 8915 28.5 21.5 133 36.1 27.0 134 Old Battle 10000 34.8 27.3 127 35.4 32.1 110 Sage Creek Basin 7850 17.9 11.8 152 16.0 13.1 122 Sandstone RS 8150 17.6 12.8 138 18.1 17.0 106 Whiskey Park 8950 30.4 24.6 124 31.5 25.5 124 ----- ----- Basin Index (%) 126 117 UPPER GREEN RIVER Big Sandy Opening 9080 12.8 11.9 108 13.6 12.0 113 Blind Bull Sum 8650 21.5 21.0 102 17.4 17.9 97 East Rim Divide 7930 10.0 9.7 103 10.4 10.8 96 Elkhart Park G.S. 9400 11.8 11.1 106 12.5 12.1 103 Gros Ventre Summit 8750 -M 11.9 * -M 11.7 * Gunsight Pass 9820 12.1 12.4 98 14.1 12.4 114 Indian Creek 9425 20.3 22.0 92 16.3 20.6 79 Kendall R.S. 7740 10.4 11.4 91 11.1 13.2 84 Loomis Park 8240 15.2 13.8 110 15.8 15.9 99 New Fork Lake 8340 9.2 9.6 96 8.8 9.9 89 Pocket Creek 9360 13.2 -M * 14.0 -M * Snider Basin 8060 11.0 11.3 97 12.7 13.0 98 Spring Creek Divide 9000 21.2 21.8 97 21.8 21.9 100 Triple Peak 8500 21.3 20.1 106 23.2 23.2 100 ----- ----- Basin Index (%) 100 97 LOWER GREEN RIVER Blacks Fork Jct 8869 8.9 -M * 11.8 -M * Buck Pasture 9632 14.2 -M * 16.8 -M * EF Blacks Fork GS 9360 11.5 -M * 9.8 -M * Hams Fork 7840 10.1 10.5 96 10.4 10.4 100 Hewinta 9500 12.0 9.9 121 13.5 12.7 106 Hickerson Park 9122 8.1 6.8 119 10.4 9.1 114 Hole-in-Rock 9168 6.6 6.9 96 9.6 8.6 112 Indian Creek 9425 20.3 22.0 92 16.3 20.6 79 Kelley R.S. 8180 -M 14.0 * -M 16.6 * Spirit Lk 10235 15.1 -M * 15.5 -M * Steel Creek Park 10158 14.3 13.7 104 16.8 14.6 115 ----- ----- Basin Index (%) 102 101 UPPER BEAR RIVER Bear River RS 8777 11.2 -M * 13.8 -M * Bug Lake 7987 22.4 17.2 130 21.7 17.8 122 Burts Miller Ranch 8000 7.8 -M * 8.0 -M * Chalk Creek #1 9171 23.7 22.0 108 27.2 22.8 119 Hayden Fork 9130 16.6 14.5 114 21.5 19.0 113 Kelley R.S. 8180 -M 14.0 * -M 16.6 * Lily Lake 9133 11.9 11.6 103 15.0 15.4 97 Monte Cristo 8932 30.0 25.0 120 28.5 23.6 121 Salt River Summit 7640 12.7 12.2 104 14.5 15.3 95 Spring Creek Divide 9000 21.2 21.8 97 21.8 21.9 100 ----- ----- Basin Index (%) 111 111 ----------------------------------------------------------------------------- -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.