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 31 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 17.6 14.7 120 20.6 20.1 102 Black Bear 8170 41.6 36.0 116 40.7 36.4 112 Blind Bull Sum 8650 22.5 22.2 101 17.9 18.7 96 Cottonwood Creek 7670 20.2 21.1 96 24.4 23.5 104 East Rim Divide 7930 10.9 9.9 110 11.1 11.3 98 Grand Targhee 9260 40.4 36.1 112 30.0 29.1 103 Granite Creek 6770 18.6 14.9 125 19.7 19.0 104 Grassy Lake 7265 32.5 31.5 103 35.2 34.5 102 Gros Ventre Summit 8750 8.2 12.8 64 11.5 12.3 93 Gunsight Pass 9820 12.4 13.3 93 14.5 13.1 111 Lewis Lake Divide 7850 33.7 29.4 115 35.7 34.0 105 Phillips Bench 8200 28.1 24.0 117 30.5 27.0 113 Salt River Summit 7640 13.7 12.8 107 15.3 15.9 96 Snake River Station 6920 19.8 15.6 127 24.1 21.6 112 Spring Creek Divide 9000 22.1 22.5 98 22.4 22.8 98 Thumb Divide 7980 18.1 14.9 121 17.7 17.7 100 Togwotee Pass 9580 23.0 21.6 106 23.4 23.2 101 Two Ocean Plateau 9240 28.6 25.5 112 24.1 26.1 92 Willow Creek 8080 30.3 27.6 110 33.0 32.0 103 Younts Peak 8350 -M 14.1 * -M 15.1 * ----- ----- Basin Index (%) 109 103 MADISON-GALLATIN Black Bear 8170 41.6 36.0 116 40.7 36.4 112 Canyon 7870 13.2 12.3 107 14.9 15.5 96 Madison Plateau 7750 26.4 21.2 125 25.9 25.1 103 West Yellowstone 6700 14.0 10.2 137 16.0 13.5 119 Whiskey Creek 6800 19.0 14.9 128 19.3 19.3 100 ----- ----- Basin Index (%) 121 106 YELLOWSTONE Beartooth Lake 9360 18.8 20.9 90 17.5 18.8 93 Burnt Mtn 5880 8.2 4.4 186 12.5 12.0 104 Canyon 7870 13.2 12.3 107 14.9 15.5 96 Cole Creek 7850 15.0 13.4 112 -M 11.9 * Evening Star 9200 24.1 23.9 101 26.6 26.0 102 Fisher Creek 9100 28.9 29.9 97 31.7 30.3 105 Northeast Entrance 7350 9.6 9.7 99 12.4 11.6 107 Parker Peak 9400 21.9 18.7 117 22.3 16.8 133 Sylvan Lake 8420 20.2 19.1 106 25.6 21.2 121 Thumb Divide 7980 18.1 14.9 121 17.7 17.7 100 Two Ocean Plateau 9240 28.6 25.5 112 24.1 26.1 92 White Mill 8700 20.6 21.5 96 17.8 22.6 79 Wolverine 7650 11.0 9.0 122 11.8 11.6 102 Younts Peak 8350 -M 14.1 * -M 15.1 * ----- ----- Basin Index (%) 107 102 WIND RIVER Burroughs Creek 8750 10.4 -M * 11.9 -M * Castle Creek 8400 4.2 -M * 5.4 -M * Cold Springs 9630 7.0 7.1 99 7.2 9.4 77 Deer Park 9700 15.5 14.6 106 16.9 18.5 91 Hobbs Park 10100 14.1 13.2 107 10.7 12.4 86 Kirwin 9550 10.1 9.4 107 10.4 11.0 95 Little Warm 9370 8.7 10.2 85 8.1 12.2 66 Owl Creek 8975 4.7 5.3 89 5.5 5.6 98 South Pass 9040 13.3 14.8 90 10.8 16.5 65 St. Lawrence Alt 8620 -M 6.7 * -M 8.5 * Togwotee Pass 9580 23.0 21.6 106 23.4 23.2 101 Townsend Creek 8700 9.4 8.9 106 10.3 11.2 92 ----- ----- Basin Index (%) 101 86 BIGHORN BASIN Bald Mtn. 9380 15.8 18.4 86 11.6 16.2 72 Bear Trap Meadow 8200 7.1 5.1 139 6.5 8.0 81 Bone Springs Div 9350 12.3 15.6 79 10.7 14.7 73 Grave Springs 8550 8.0 8.8 91 8.8 9.9 89 Kirwin 9550 10.1 9.4 107 10.4 11.0 95 Marquette 8760 7.2 -M * 8.5 -M * Middle Powder 7760 8.8 11.2 79 4.8 11.1 43 Owl Creek 8975 4.7 5.3 89 5.5 5.6 98 Powder River Pass 9480 9.0 9.9 91 8.6 11.9 72 Shell Creek 9580 12.2 14.4 85 10.6 13.1 81 Timber Creek 7950 3.8 4.7 81 5.7 6.9 83 ----- ----- Basin Index (%) 89 77 SHOSHONE RIVER Blackwater 9780 22.2 22.0 101 22.4 19.5 115 Evening Star 9200 24.1 23.9 101 26.6 26.0 102 Marquette 8760 7.2 -M * 8.5 -M * Sylvan Lake 8420 20.2 19.1 106 25.6 21.2 121 Sylvan Road 7120 11.1 11.1 100 15.2 16.0 95 Younts Peak 8350 -M 14.1 * -M 15.1 * ----- ----- Basin Index (%) 102 109 POWDER RIVER Bear Trap Meadow 8200 7.1 5.1 139 6.5 8.0 81 Cloud Peak Reservoir 9860 11.3 14.0 81 9.9 12.5 79 Grave Springs 8550 8.0 8.8 91 8.8 9.9 89 Hansen Sawmill 8360 5.2 6.3 83 6.7 8.0 84 Middle Powder 7760 8.8 11.2 79 4.8 11.1 43 Powder River Pass 9480 9.0 9.9 91 8.6 11.9 72 Soldier Park 8720 3.7 -M * 6.3 -M * ----- ----- Basin Index (%) 89 74 TONGUE RIVER Big Goose 7990 7.6 8.7 87 9.3 10.5 89 Bone Springs Div 9350 12.3 15.6 79 10.7 14.7 73 Burgess Junction 7880 8.0 11.2 71 7.9 11.6 68 Dome Lake 8880 8.2 11.4 72 7.3 12.8 57 Little Goose 8870 8.6 -M * 7.3 -M * Sucker Creek 8880 10.3 11.4 90 9.3 13.5 69 Tie Creek 6870 4.5 5.4 83 9.3 10.8 86 ----- ----- Basin Index (%) 80 73 BELLE FOURCHE Blind Park 6890 7.0 7.2 97 7.3 11.2 65 Cole Canyon 5910 6.7 5.8 116 10.8 8.7 124 ----- ----- Basin Index (%) 105 91 CHEYENNE RIVER BASIN Blind Park 6890 7.0 7.2 97 7.3 11.2 65 North Rapid Creek 6130 6.6 6.7 99 6.6 9.2 72 ----- ----- Basin Index (%) 98 68 UPPER N. PLATTE Arapaho Ridge 10960 25.4 19.6 130 25.4 21.1 120 Blackhall Mtn 9820 32.0 -M * 32.5 -M * Columbine 9160 28.9 22.6 128 28.0 24.3 115 Divide Peak 8880 21.0 19.4 108 23.1 20.4 113 Joe Wright 10120 21.8 20.1 108 29.3 24.5 120 Laprele Creek 8375 13.2 9.4 140 14.1 11.7 121 Med Bow 10500 36.9 -M * 33.0 -M * Never Summer 10280 22.3 19.4 115 18.5 -M * North French Creek 10130 29.2 27.8 105 29.1 25.5 114 Old Battle 10000 35.4 29.2 121 35.8 33.4 107 Rawah 9020 14.6 10.3 142 17.1 13.5 127 Sage Creek Basin 7850 18.8 12.6 149 16.1 13.7 118 Sand Lake 10050 28.4 27.3 104 23.9 23.4 102 South Brush Creek 8440 11.8 12.2 97 11.9 14.5 82 Tower 10500 50.1 43.6 115 -M 37.9 * Webber Springs 9250 26.4 22.8 116 30.4 25.4 120 Whiskey Park 8950 30.9 25.5 121 31.9 26.7 119 Willow Creek Pass 9540 16.0 11.7 137 17.0 12.7 134 Zirkel 9340 33.0 26.3 125 36.5 27.1 135 ----- ----- Basin Index (%) 119 116 SWEETWATER Deer Park 9700 15.5 14.6 106 16.9 18.5 91 Larsen Creek 9000 10.3 12.1 85 13.6 -M * South Pass 9040 13.3 14.8 90 10.8 16.5 65 ----- ----- Basin Index (%) 94 79 LOWER N. PLATTE Casper Mtn. 7900 15.8 13.2 120 12.0 13.9 86 Laprele Creek 8375 13.2 9.4 140 14.1 11.7 121 Reno Hill 8400 16.3 13.0 125 16.6 14.4 115 Windy Peak 7900 10.9 7.8 140 11.3 10.0 113 ----- ----- Basin Index (%) 129 108 LARAMIE RIVER Brooklyn Lake 10240 23.7 19.7 120 24.7 20.0 124 Cinnabar Park 9574 20.1 19.8 102 22.8 22.9 100 Crow Creek 8330 5.8 6.7 87 10.2 10.1 101 Deadman Hill 10220 21.0 15.4 136 19.5 16.3 120 Rawah 9020 14.6 10.3 142 17.1 13.5 127 Roach 9700 17.6 15.4 114 21.1 18.2 116 Windy Peak 7900 10.9 7.8 140 11.3 10.0 113 ----- ----- Basin Index (%) 120 114 S. PLATTE Black Mountain 8920 11.7 -M * 12.6 -M * Crow Creek 8330 5.8 6.7 87 10.2 10.1 101 Deadman Hill 10220 21.0 15.4 136 19.5 16.3 120 ----- ----- Basin Index (%) 121 112 LITTLE SNAKE RIVER Battle Mountain 7440 13.3 10.7 124 15.8 14.4 110 Divide Peak 8880 21.0 19.4 108 23.1 20.4 113 Elk River 8700 20.4 18.3 111 19.1 19.1 100 Little Snake River 8915 29.0 22.9 127 36.5 28.2 129 Old Battle 10000 35.4 29.2 121 35.8 33.4 107 Sage Creek Basin 7850 18.8 12.6 149 16.1 13.7 118 Sandstone RS 8150 17.6 13.1 134 18.2 17.6 103 Whiskey Park 8950 30.9 25.5 121 31.9 26.7 119 ----- ----- Basin Index (%) 123 113 UPPER GREEN RIVER Big Sandy Opening 9080 13.2 12.3 107 13.9 12.6 110 Blind Bull Sum 8650 22.5 22.2 101 17.9 18.7 96 East Rim Divide 7930 10.9 9.9 110 11.1 11.3 98 Elkhart Park G.S. 9400 12.6 12.0 105 13.2 12.7 104 Gros Ventre Summit 8750 8.2 12.8 64 11.5 12.3 93 Gunsight Pass 9820 12.4 13.3 93 14.5 13.1 111 Indian Creek 9425 21.8 23.7 92 17.4 21.6 81 Kendall R.S. 7740 10.5 11.4 92 11.0 13.7 80 Loomis Park 8240 15.5 14.4 108 16.2 16.6 98 New Fork Lake 8340 10.1 10.3 98 9.1 10.3 88 Pocket Creek 9360 14.1 -M * 14.6 -M * Snider Basin 8060 11.4 12.1 94 12.9 13.6 95 Spring Creek Divide 9000 22.1 22.5 98 22.4 22.8 98 Triple Peak 8500 22.7 21.5 106 24.2 24.3 100 ----- ----- Basin Index (%) 98 96 LOWER GREEN RIVER Blacks Fork Jct 8869 8.9 -M * 12.3 -M * Buck Pasture 9632 15.0 -M * 17.9 -M * EF Blacks Fork GS 9360 11.7 -M * 10.3 -M * Hams Fork 7840 10.5 10.8 97 11.0 10.9 101 Hewinta 9500 12.5 10.8 116 13.8 13.3 104 Hickerson Park 9122 9.1 7.4 123 10.7 9.6 111 Hole-in-Rock 9168 6.5 7.0 93 9.7 9.1 107 Indian Creek 9425 21.8 23.7 92 17.4 21.6 81 Kelley R.S. 8180 14.7 14.8 99 15.1 17.3 87 Spirit Lk 10235 15.5 -M * 15.9 -M * Steel Creek Park 10158 14.9 15.1 99 17.4 15.5 112 ----- ----- Basin Index (%) 100 98 UPPER BEAR RIVER Bear River RS 8777 11.4 -M * 14.4 -M * Bug Lake 7987 23.3 18.0 129 22.6 18.5 122 Burts Miller Ranch 8000 7.2 -M * 8.2 -M * Chalk Creek #1 9171 25.0 23.2 108 28.6 24.0 119 Hayden Fork 9130 16.9 15.0 113 22.2 20.0 111 Kelley R.S. 8180 14.7 14.8 99 15.1 17.3 87 Lily Lake 9133 12.4 12.0 103 15.6 16.2 96 Monte Cristo 8932 32.4 26.0 125 30.4 24.8 123 Salt River Summit 7640 13.7 12.8 107 15.3 15.9 96 Spring Creek Divide 9000 22.1 22.5 98 22.4 22.8 98 ----- ----- Basin Index (%) 111 108 ----------------------------------------------------------------------------- -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.