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 MONDAY: APRIL 8 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 17.0 15.2 112 20.9 20.7 101 Black Bear 8170 44.6 37.1 120 43.1 37.9 114 Blind Bull Sum 8650 23.8 23.3 102 18.6 19.3 96 Cottonwood Creek 7670 20.5 20.9 98 25.4 24.4 104 East Rim Divide 7930 10.8 10.2 106 11.6 11.7 99 Grand Targhee 9260 43.0 38.7 111 31.4 30.7 102 Granite Creek 6770 17.8 14.3 124 20.1 19.5 103 Grassy Lake 7265 33.4 31.4 106 37.0 35.6 104 Gros Ventre Summit 8750 8.7 12.9 67 11.6 12.8 91 Gunsight Pass 9820 12.6 13.9 91 15.2 13.8 110 Lewis Lake Divide 7850 36.1 30.0 120 37.9 35.1 108 Phillips Bench 8200 29.4 25.5 115 31.3 27.9 112 Salt River Summit 7640 13.4 12.7 106 16.0 16.5 97 Snake River Station 6920 19.1 14.8 129 25.1 22.2 113 Spring Creek Divide 9000 23.0 22.5 102 23.4 23.6 99 Thumb Divide 7980 19.2 14.7 131 18.7 18.4 102 Togwotee Pass 9580 23.3 22.2 105 24.2 24.1 100 Two Ocean Plateau 9240 30.0 26.2 115 25.2 26.9 94 Willow Creek 8080 31.2 28.4 110 34.4 33.3 103 Younts Peak 8350 -M 14.4 * -M 15.6 * ----- ----- Basin Index (%) 110 104 MADISON-GALLATIN Black Bear 8170 44.6 37.1 120 43.1 37.9 114 Canyon 7870 13.8 12.4 111 16.0 16.1 99 Madison Plateau 7750 28.6 21.6 132 27.9 26.1 107 West Yellowstone 6700 12.6 9.3 135 17.3 14.1 123 Whiskey Creek 6800 19.8 14.8 134 20.7 20.0 104 ----- ----- Basin Index (%) 125 109 YELLOWSTONE Beartooth Lake 9360 20.1 21.4 94 18.3 19.5 94 Burnt Mtn 5880 6.3 4.3 147 12.7 12.9 98 Canyon 7870 13.8 12.4 111 16.0 16.1 99 Cole Creek 7850 15.2 14.8 103 -M 12.9 * Evening Star 9200 25.4 23.8 107 28.2 27.1 104 Fisher Creek 9100 31.8 31.3 102 34.2 31.3 109 Northeast Entrance 7350 9.7 8.9 109 13.5 12.1 112 Parker Peak 9400 23.3 19.6 119 23.6 17.5 135 Sylvan Lake 8420 20.8 19.4 107 26.7 22.0 121 Thumb Divide 7980 19.2 14.7 131 18.7 18.4 102 Two Ocean Plateau 9240 30.0 26.2 115 25.2 26.9 94 White Mill 8700 22.7 22.3 102 19.4 23.4 83 Wolverine 7650 10.8 9.6 112 12.5 12.1 103 Younts Peak 8350 -M 14.4 * -M 15.6 * ----- ----- Basin Index (%) 109 104 WIND RIVER Burroughs Creek 8750 10.4 -M * 12.5 -M * Castle Creek 8400 3.8 -M * 5.8 -M * Cold Springs 9630 7.1 6.6 108 7.5 9.9 76 Deer Park 9700 15.3 15.8 97 17.3 19.9 87 Hobbs Park 10100 14.1 14.2 99 11.0 13.5 81 Kirwin 9550 10.3 9.6 107 10.9 11.5 95 Little Warm 9370 9.0 10.3 87 9.2 12.8 72 Owl Creek 8975 4.0 5.8 69 5.9 6.0 98 South Pass 9040 13.3 15.3 87 11.0 17.3 64 St. Lawrence Alt 8620 -M 6.9 * -M 9.0 * Togwotee Pass 9580 23.3 22.2 105 24.2 24.1 100 Townsend Creek 8700 9.6 9.7 99 10.6 12.0 88 ----- ----- Basin Index (%) 97 85 BIGHORN BASIN Bald Mtn. 9380 16.1 19.2 84 12.0 16.8 71 Bear Trap Meadow 8200 6.3 4.9 129 6.9 8.6 80 Bone Springs Div 9350 12.0 16.9 71 11.0 15.5 71 Grave Springs 8550 7.9 9.5 83 9.0 10.7 84 Kirwin 9550 10.3 9.6 107 10.9 11.5 95 Marquette 8760 8.0 -M * 8.8 -M * Middle Powder 7760 -M 12.1 * 7.0 11.7 60 Owl Creek 8975 4.0 5.8 69 5.9 6.0 98 Powder River Pass 9480 9.3 10.2 91 10.1 12.6 80 Shell Creek 9580 12.6 15.2 83 10.9 13.7 80 Timber Creek 7950 3.4 5.0 68 5.9 7.3 81 ----- ----- Basin Index (%) 85 78 SHOSHONE RIVER Blackwater 9780 23.3 22.7 103 23.7 20.3 117 Evening Star 9200 25.4 23.8 107 28.2 27.1 104 Marquette 8760 8.0 -M * 8.8 -M * Sylvan Lake 8420 20.8 19.4 107 26.7 22.0 121 Sylvan Road 7120 9.2 10.7 86 15.3 16.5 93 Younts Peak 8350 -M 14.4 * -M 15.6 * ----- ----- Basin Index (%) 103 109 POWDER RIVER Bear Trap Meadow 8200 6.3 4.9 129 6.9 8.6 80 Cloud Peak Reservoir 9860 11.2 14.9 75 10.5 13.4 78 Grave Springs 8550 7.9 9.5 83 9.0 10.7 84 Hansen Sawmill 8360 5.4 6.1 89 7.1 8.6 83 Middle Powder 7760 -M 12.1 * 7.0 11.7 60 Powder River Pass 9480 9.3 10.2 91 10.1 12.6 80 Soldier Park 8720 3.6 -M * 6.6 -M * ----- ----- Basin Index (%) 88 77 TONGUE RIVER Big Goose 7990 7.5 9.7 77 9.4 11.5 82 Bone Springs Div 9350 12.0 16.9 71 11.0 15.5 71 Burgess Junction 7880 8.1 12.0 68 8.4 12.3 68 Dome Lake 8880 -M 11.8 * 7.8 13.6 57 Little Goose 8870 8.8 -M * 7.5 -M * Sucker Creek 8880 10.4 12.3 85 9.7 14.4 67 Tie Creek 6870 3.3 5.6 59 9.7 11.7 83 ----- ----- Basin Index (%) 73 71 BELLE FOURCHE Blind Park 6890 4.1 6.9 59 7.5 11.9 63 Cole Canyon 5910 4.4 4.9 90 10.7 9.6 111 ----- ----- Basin Index (%) 72 85 CHEYENNE RIVER BASIN Blind Park 6890 4.1 6.9 59 7.5 11.9 63 North Rapid Creek 6130 4.6 6.4 72 6.9 10.0 69 ----- ----- Basin Index (%) 65 66 UPPER N. PLATTE Arapaho Ridge 10960 25.3 21.0 120 25.8 22.6 114 Blackhall Mtn 9820 32.6 -M * 33.5 -M * Columbine 9160 28.5 23.4 122 28.6 25.5 112 Divide Peak 8880 21.7 20.0 108 23.9 21.4 112 Joe Wright 10120 22.0 21.4 103 29.9 25.8 116 Laprele Creek 8375 13.1 9.4 139 14.7 12.5 118 Med Bow 10500 37.4 -M * 34.5 -M * Never Summer 10280 22.5 20.4 110 18.9 -M * North French Creek 10130 30.2 29.7 102 30.3 26.7 113 Old Battle 10000 36.7 31.5 117 37.1 34.9 106 Rawah 9020 12.8 10.6 121 17.5 14.4 122 Sage Creek Basin 7850 18.8 11.6 162 16.6 14.6 114 Sand Lake 10050 29.5 29.1 101 24.6 24.8 99 South Brush Creek 8440 9.9 11.8 84 12.4 15.2 82 Tower 10500 51.4 46.0 112 45.3 39.8 114 Webber Springs 9250 26.3 23.1 114 31.6 26.7 118 Whiskey Park 8950 31.3 27.5 114 32.9 27.9 118 Willow Creek Pass 9540 16.1 12.2 132 17.3 13.4 129 Zirkel 9340 34.2 26.2 131 37.4 28.5 131 ----- ----- Basin Index (%) 115 114 SWEETWATER Deer Park 9700 15.3 15.8 97 17.3 19.9 87 Larsen Creek 9000 10.1 11.5 88 14.2 -M * South Pass 9040 13.3 15.3 87 11.0 17.3 64 ----- ----- Basin Index (%) 91 76 LOWER N. PLATTE Casper Mtn. 7900 15.4 14.4 107 12.6 15.1 83 Laprele Creek 8375 13.1 9.4 139 14.7 12.5 118 Reno Hill 8400 16.7 14.0 119 17.5 15.6 112 Windy Peak 7900 10.4 7.7 135 11.8 10.6 111 ----- ----- Basin Index (%) 122 105 LARAMIE RIVER Brooklyn Lake 10240 24.2 22.0 110 25.4 21.1 120 Cinnabar Park 9574 20.3 21.3 95 23.6 24.1 98 Crow Creek 8330 5.6 6.9 81 10.7 10.9 98 Deadman Hill 10220 21.3 16.2 131 20.0 17.3 116 Rawah 9020 12.8 10.6 121 17.5 14.4 122 Roach 9700 17.7 16.6 107 21.9 19.1 115 Windy Peak 7900 10.4 7.7 135 11.8 10.6 111 ----- ----- Basin Index (%) 111 111 S. PLATTE Black Mountain 8920 11.9 -M * 13.0 -M * Crow Creek 8330 5.6 6.9 81 10.7 10.9 98 Deadman Hill 10220 21.3 16.2 131 20.0 17.3 116 ----- ----- Basin Index (%) 116 109 LITTLE SNAKE RIVER Battle Mountain 7440 10.9 9.3 117 16.7 15.0 111 Divide Peak 8880 21.7 20.0 108 23.9 21.4 112 Elk River 8700 18.8 19.1 98 19.6 20.0 98 Little Snake River 8915 29.2 25.5 115 37.9 29.9 127 Old Battle 10000 36.7 31.5 117 37.1 34.9 106 Sage Creek Basin 7850 18.8 11.6 162 16.6 14.6 114 Sandstone RS 8150 15.7 12.8 123 18.9 18.3 103 Whiskey Park 8950 31.3 27.5 114 32.9 27.9 118 ----- ----- Basin Index (%) 116 112 UPPER GREEN RIVER Big Sandy Opening 9080 13.6 12.7 107 14.4 13.2 109 Blind Bull Sum 8650 23.8 23.3 102 18.6 19.3 96 East Rim Divide 7930 10.8 10.2 106 11.6 11.7 99 Elkhart Park G.S. 9400 13.3 12.3 108 13.8 13.2 105 Gros Ventre Summit 8750 8.7 12.9 67 11.6 12.8 91 Gunsight Pass 9820 12.6 13.9 91 15.2 13.8 110 Indian Creek 9425 22.7 24.7 92 18.2 22.4 81 Kendall R.S. 7740 10.3 11.4 90 11.5 14.1 82 Loomis Park 8240 14.9 13.8 108 16.6 17.2 97 New Fork Lake 8340 10.0 10.3 97 9.6 10.7 90 Pocket Creek 9360 14.7 -M * 15.3 -M * Snider Basin 8060 11.1 12.3 90 13.5 14.1 96 Spring Creek Divide 9000 23.0 22.5 102 23.4 23.6 99 Triple Peak 8500 24.0 21.8 110 25.0 25.1 100 ----- ----- Basin Index (%) 98 96 LOWER GREEN RIVER Blacks Fork Jct 8869 8.4 -M * 12.4 -M * Buck Pasture 9632 14.6 -M * 18.2 -M * EF Blacks Fork GS 9360 11.2 -M * 10.4 -M * Hams Fork 7840 10.0 10.5 95 11.6 11.3 103 Hewinta 9500 10.8 10.9 99 14.2 14.0 101 Hickerson Park 9122 9.1 7.9 115 10.9 10.2 107 Hole-in-Rock 9168 6.6 7.0 94 10.1 9.7 104 Indian Creek 9425 22.7 24.7 92 18.2 22.4 81 Kelley R.S. 8180 15.2 14.6 104 15.8 18.0 88 Spirit Lk 10235 16.0 -M * 16.3 -M * Steel Creek Park 10158 15.0 15.8 95 17.4 16.5 105 ----- ----- Basin Index (%) 98 96 UPPER BEAR RIVER Bear River RS 8777 10.0 -M * 14.5 -M * Bug Lake 7987 23.5 18.5 127 23.4 19.3 121 Burts Miller Ranch 8000 5.2 -M * 8.3 -M * Chalk Creek #1 9171 25.1 24.4 103 29.1 25.1 116 Hayden Fork 9130 15.6 15.3 102 22.5 21.1 107 Kelley R.S. 8180 15.2 14.6 104 15.8 18.0 88 Lily Lake 9133 12.1 12.7 95 15.7 17.1 92 Monte Cristo 8932 33.6 27.8 121 31.4 25.9 121 Salt River Summit 7640 13.4 12.7 106 16.0 16.5 97 Spring Creek Divide 9000 23.0 22.5 102 23.4 23.6 99 ----- ----- Basin Index (%) 109 106 ----------------------------------------------------------------------------- -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.