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 THURSDAY: APRIL 4 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 17.3 15.0 115 20.7 20.4 101 Black Bear 8170 42.0 37.0 114 41.3 37.3 111 Blind Bull Sum 8650 23.1 23.0 100 18.3 19.1 96 Cottonwood Creek 7670 20.6 21.2 97 24.9 24.1 103 East Rim Divide 7930 11.0 10.2 108 11.5 11.5 100 Grand Targhee 9260 42.1 37.6 112 30.9 30.2 102 Granite Creek 6770 18.9 14.7 129 20.0 19.3 104 Grassy Lake 7265 33.3 31.6 105 35.7 35.2 101 Gros Ventre Summit 8750 8.3 13.0 64 11.7 12.6 93 Gunsight Pass 9820 12.4 13.6 91 14.9 13.4 111 Lewis Lake Divide 7850 34.4 29.6 116 36.4 34.6 105 Phillips Bench 8200 28.7 24.7 116 31.1 27.5 113 Salt River Summit 7640 13.9 13.0 107 15.8 16.3 97 Snake River Station 6920 19.4 15.1 128 24.5 21.9 112 Spring Creek Divide 9000 22.8 22.5 101 23.2 23.3 100 Thumb Divide 7980 18.5 14.7 126 18.1 18.1 100 Togwotee Pass 9580 23.2 21.8 106 24.0 23.7 101 Two Ocean Plateau 9240 29.0 25.7 113 24.5 26.5 92 Willow Creek 8080 30.8 28.2 109 33.7 32.8 103 Younts Peak 8350 -M 14.2 * -M 15.4 * ----- ----- Basin Index (%) 109 103 MADISON-GALLATIN Black Bear 8170 42.0 37.0 114 41.3 37.3 111 Canyon 7870 13.1 12.4 106 15.1 15.8 96 Madison Plateau 7750 26.7 21.4 125 26.3 25.6 103 West Yellowstone 6700 13.0 10.0 130 16.4 13.8 119 Whiskey Creek 6800 19.3 15.0 129 19.4 19.6 99 ----- ----- Basin Index (%) 119 106 YELLOWSTONE Beartooth Lake 9360 19.0 21.2 90 17.7 19.2 92 Burnt Mtn 5880 8.1 4.6 176 12.7 12.6 101 Canyon 7870 13.1 12.4 106 15.1 15.8 96 Cole Creek 7850 15.5 14.1 110 -M 12.4 * Evening Star 9200 24.2 23.8 102 27.0 26.5 102 Fisher Creek 9100 29.3 30.8 95 32.2 30.8 105 Northeast Entrance 7350 9.6 9.2 104 12.5 11.9 105 Parker Peak 9400 22.4 19.1 117 22.8 17.1 133 Sylvan Lake 8420 20.3 19.3 105 26.0 21.7 120 Thumb Divide 7980 18.5 14.7 126 18.1 18.1 100 Two Ocean Plateau 9240 29.0 25.7 113 24.5 26.5 92 White Mill 8700 20.8 21.9 95 18.0 23.1 78 Wolverine 7650 11.2 9.4 119 12.3 11.9 103 Younts Peak 8350 -M 14.2 * -M 15.4 * ----- ----- Basin Index (%) 107 102 WIND RIVER Burroughs Creek 8750 10.6 -M * 12.2 -M * Castle Creek 8400 4.3 -M * 5.7 -M * Cold Springs 9630 6.9 7.0 99 7.4 9.7 76 Deer Park 9700 15.6 15.1 103 17.2 19.3 89 Hobbs Park 10100 14.2 13.8 103 11.0 13.0 85 Kirwin 9550 10.5 9.5 111 10.7 11.2 96 Little Warm 9370 9.1 10.2 89 9.0 12.5 72 Owl Creek 8975 4.9 5.7 86 5.9 5.9 100 South Pass 9040 13.6 15.1 90 11.0 17.0 65 St. Lawrence Alt 8620 -M 6.8 * -M 8.7 * Togwotee Pass 9580 23.2 21.8 106 24.0 23.7 101 Townsend Creek 8700 9.6 9.3 103 10.5 11.7 90 ----- ----- Basin Index (%) 100 86 BIGHORN BASIN Bald Mtn. 9380 16.1 18.9 85 11.9 16.5 72 Bear Trap Meadow 8200 7.1 5.1 139 6.9 8.2 84 Bone Springs Div 9350 12.4 16.4 76 11.0 15.1 73 Grave Springs 8550 8.2 9.1 90 9.0 10.2 88 Kirwin 9550 10.5 9.5 111 10.7 11.2 96 Marquette 8760 7.3 -M * 8.8 -M * Middle Powder 7760 9.2 11.7 79 5.0 11.3 44 Owl Creek 8975 4.9 5.7 86 5.9 5.9 100 Powder River Pass 9480 9.3 10.1 92 9.4 12.2 77 Shell Creek 9580 12.6 14.8 85 10.8 13.4 81 Timber Creek 7950 4.0 4.9 82 5.9 7.2 82 ----- ----- Basin Index (%) 89 78 SHOSHONE RIVER Blackwater 9780 22.8 22.3 102 23.1 20.0 116 Evening Star 9200 24.2 23.8 102 27.0 26.5 102 Marquette 8760 7.3 -M * 8.8 -M * Sylvan Lake 8420 20.3 19.3 105 26.0 21.7 120 Sylvan Road 7120 10.2 11.0 93 15.2 16.3 93 Younts Peak 8350 -M 14.2 * -M 15.4 * ----- ----- Basin Index (%) 101 108 POWDER RIVER Bear Trap Meadow 8200 7.1 5.1 139 6.9 8.2 84 Cloud Peak Reservoir 9860 11.4 14.4 79 10.2 12.9 79 Grave Springs 8550 8.2 9.1 90 9.0 10.2 88 Hansen Sawmill 8360 5.5 6.2 89 7.1 8.3 86 Middle Powder 7760 9.2 11.7 79 5.0 11.3 44 Powder River Pass 9480 9.3 10.1 92 9.4 12.2 77 Soldier Park 8720 4.1 -M * 6.6 -M * ----- ----- Basin Index (%) 90 75 TONGUE RIVER Big Goose 7990 7.8 9.3 84 9.4 11.1 85 Bone Springs Div 9350 12.4 16.4 76 11.0 15.1 73 Burgess Junction 7880 8.3 11.6 72 8.3 12.0 69 Dome Lake 8880 8.5 11.6 73 7.7 13.2 58 Little Goose 8870 8.6 -M * 7.5 -M * Sucker Creek 8880 10.4 11.8 88 9.6 14.0 69 Tie Creek 6870 4.5 5.5 82 9.6 11.3 85 ----- ----- Basin Index (%) 78 72 BELLE FOURCHE Blind Park 6890 6.9 7.1 97 7.4 11.5 64 Cole Canyon 5910 6.4 5.6 114 10.8 9.1 119 ----- ----- Basin Index (%) 105 88 CHEYENNE RIVER BASIN Blind Park 6890 6.9 7.1 97 7.4 11.5 64 North Rapid Creek 6130 6.3 6.7 94 6.8 9.5 72 ----- ----- Basin Index (%) 96 68 UPPER N. PLATTE Arapaho Ridge 10960 25.2 20.4 124 25.7 21.8 118 Blackhall Mtn 9820 32.9 -M * 33.1 -M * Columbine 9160 28.9 23.3 124 28.6 25.0 114 Divide Peak 8880 21.7 19.7 110 23.5 21.0 112 Joe Wright 10120 21.4 20.6 104 29.7 25.2 118 Laprele Creek 8375 13.9 9.4 148 14.6 12.2 120 Med Bow 10500 38.1 -M * 33.5 -M * Never Summer 10280 22.5 20.0 112 18.8 -M * North French Creek 10130 30.1 28.7 105 30.1 26.1 115 Old Battle 10000 36.5 30.7 119 36.8 34.2 108 Rawah 9020 14.4 10.4 138 17.5 13.8 127 Sage Creek Basin 7850 19.5 12.5 156 16.5 14.2 116 Sand Lake 10050 29.3 28.3 104 24.5 24.2 101 South Brush Creek 8440 12.0 12.1 99 12.2 14.9 82 Tower 10500 51.0 45.1 113 45.3 38.9 116 Webber Springs 9250 26.7 23.0 116 31.5 26.1 121 Whiskey Park 8950 31.4 26.8 117 32.8 27.3 120 Willow Creek Pass 9540 16.3 12.0 136 17.3 13.1 132 Zirkel 9340 33.9 26.3 129 37.3 27.8 134 ----- ----- Basin Index (%) 118 116 SWEETWATER Deer Park 9700 15.6 15.1 103 17.2 19.3 89 Larsen Creek 9000 10.9 11.9 92 14.2 -M * South Pass 9040 13.6 15.1 90 11.0 17.0 65 ----- ----- Basin Index (%) 95 78 LOWER N. PLATTE Casper Mtn. 7900 16.0 14.0 114 12.5 14.4 87 Laprele Creek 8375 13.9 9.4 148 14.6 12.2 120 Reno Hill 8400 17.2 13.7 126 17.4 14.9 117 Windy Peak 7900 11.2 7.8 144 11.7 10.2 115 ----- ----- Basin Index (%) 130 109 LARAMIE RIVER Brooklyn Lake 10240 24.1 21.0 115 25.3 20.6 123 Cinnabar Park 9574 20.4 20.6 99 23.6 23.6 100 Crow Creek 8330 6.2 7.0 89 10.7 10.5 102 Deadman Hill 10220 21.3 15.9 134 19.9 16.9 118 Rawah 9020 14.4 10.4 138 17.5 13.8 127 Roach 9700 17.9 16.1 111 21.7 18.8 115 Windy Peak 7900 11.2 7.8 144 11.7 10.2 115 ----- ----- Basin Index (%) 117 114 S. PLATTE Black Mountain 8920 12.0 -M * 12.9 -M * Crow Creek 8330 6.2 7.0 89 10.7 10.5 102 Deadman Hill 10220 21.3 15.9 134 19.9 16.9 118 ----- ----- Basin Index (%) 120 112 LITTLE SNAKE RIVER Battle Mountain 7440 13.1 10.2 128 16.7 14.7 114 Divide Peak 8880 21.7 19.7 110 23.5 21.0 112 Elk River 8700 20.4 19.1 107 19.3 19.6 98 Little Snake River 8915 29.8 24.2 123 37.8 29.1 130 Old Battle 10000 36.5 30.7 119 36.8 34.2 108 Sage Creek Basin 7850 19.5 12.5 156 16.5 14.2 116 Sandstone RS 8150 17.4 12.9 135 18.8 18.0 104 Whiskey Park 8950 31.4 26.8 117 32.8 27.3 120 ----- ----- Basin Index (%) 122 114 UPPER GREEN RIVER Big Sandy Opening 9080 13.5 12.4 109 14.4 12.9 112 Blind Bull Sum 8650 23.1 23.0 100 18.3 19.1 96 East Rim Divide 7930 11.0 10.2 108 11.5 11.5 100 Elkhart Park G.S. 9400 13.0 12.2 107 13.6 13.0 105 Gros Ventre Summit 8750 8.3 13.0 64 11.7 12.6 93 Gunsight Pass 9820 12.4 13.6 91 14.9 13.4 111 Indian Creek 9425 22.5 24.3 93 18.0 22.1 81 Kendall R.S. 7740 10.5 11.5 91 11.4 13.9 82 Loomis Park 8240 15.7 14.0 112 16.6 16.9 98 New Fork Lake 8340 10.3 10.3 100 9.5 10.5 90 Pocket Creek 9360 14.6 -M * 15.2 -M * Snider Basin 8060 11.5 12.3 93 13.4 13.9 96 Spring Creek Divide 9000 22.8 22.5 101 23.2 23.3 100 Triple Peak 8500 23.4 21.9 107 24.7 24.8 100 ----- ----- Basin Index (%) 98 97 LOWER GREEN RIVER Blacks Fork Jct 8869 9.2 -M * 12.4 -M * Buck Pasture 9632 15.0 -M * 18.1 -M * EF Blacks Fork GS 9360 11.9 -M * 10.3 -M * Hams Fork 7840 10.9 10.9 100 11.5 11.1 104 Hewinta 9500 13.0 11.0 118 14.1 13.7 103 Hickerson Park 9122 9.0 7.7 117 10.9 10.0 109 Hole-in-Rock 9168 6.7 6.9 97 10.0 9.4 106 Indian Creek 9425 22.5 24.3 93 18.0 22.1 81 Kelley R.S. 8180 15.4 15.0 103 15.7 17.7 89 Spirit Lk 10235 15.8 -M * 16.3 -M * Steel Creek Park 10158 14.7 15.6 94 17.4 16.1 108 ----- ----- Basin Index (%) 101 98 UPPER BEAR RIVER Bear River RS 8777 10.9 -M * 14.5 -M * Bug Lake 7987 23.9 18.2 131 23.3 19.0 123 Burts Miller Ranch 8000 7.1 -M * 8.4 -M * Chalk Creek #1 9171 25.5 23.9 107 29.0 24.7 117 Hayden Fork 9130 16.4 15.3 107 22.5 20.6 109 Kelley R.S. 8180 15.4 15.0 103 15.7 17.7 89 Lily Lake 9133 12.6 12.4 102 15.7 16.7 94 Monte Cristo 8932 33.4 27.2 123 31.1 25.4 122 Salt River Summit 7640 13.9 13.0 107 15.8 16.3 97 Spring Creek Divide 9000 22.8 22.5 101 23.2 23.3 100 ----- ----- 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.