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 FRIDAY: APRIL 19 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 18.5 12.0 154 23.9 21.7 110 Black Bear 8170 45.8 36.8 124 48.3 39.6 122 Blind Bull Sum 8650 26.3 24.0 110 20.7 20.1 103 Cottonwood Creek 7670 22.6 18.8 120 28.6 25.7 111 East Rim Divide 7930 9.9 9.6 103 12.9 12.2 106 Grand Targhee 9260 47.9 41.9 114 34.0 32.4 105 Granite Creek 6770 17.8 11.1 160 22.8 20.2 113 Grassy Lake 7265 35.5 31.5 113 41.3 37.2 111 Gros Ventre Summit 8750 8.1 13.2 61 13.5 13.6 99 Gunsight Pass 9820 14.2 13.6 104 16.9 14.8 114 Lewis Lake Divide 7850 40.0 30.3 132 42.3 36.6 116 Phillips Bench 8200 31.8 25.7 124 34.8 29.0 120 Salt River Summit 7640 14.9 10.0 149 18.3 17.3 106 Snake River Station 6920 18.7 11.5 163 27.4 23.4 117 Spring Creek Divide 9000 24.9 23.5 106 25.6 24.6 104 Thumb Divide 7980 20.5 14.5 141 20.9 19.6 107 Togwotee Pass 9580 26.2 23.7 111 27.2 25.5 107 Two Ocean Plateau 9240 34.1 27.9 122 28.6 28.4 101 Willow Creek 8080 35.5 26.8 132 38.9 35.1 111 Younts Peak 8350 -M 15.1 * -M 16.6 * ----- ----- Basin Index (%) 121 110 MADISON-GALLATIN Black Bear 8170 45.8 36.8 124 48.3 39.6 122 Canyon 7870 14.7 12.3 120 18.0 16.9 107 Madison Plateau 7750 32.5 22.9 142 30.9 27.4 113 West Yellowstone 6700 9.9 7.8 127 18.7 15.0 125 Whiskey Creek 6800 19.7 15.2 130 23.6 21.1 112 ----- ----- Basin Index (%) 129 116 YELLOWSTONE Beartooth Lake 9360 23.5 23.2 101 22.0 20.6 107 Burnt Mtn 5880 6.1 .0 * 15.1 14.1 107 Canyon 7870 14.7 12.3 120 18.0 16.9 107 Cole Creek 7850 18.3 16.1 114 -M 14.4 * Evening Star 9200 28.6 24.9 115 31.5 28.6 110 Fisher Creek 9100 36.6 32.3 113 38.9 33.2 117 Northeast Entrance 7350 9.2 7.0 131 15.8 12.9 122 Parker Peak 9400 26.8 20.8 129 26.5 18.6 142 Sylvan Lake 8420 22.9 20.4 112 29.7 23.4 127 Thumb Divide 7980 20.5 14.5 141 20.9 19.6 107 Two Ocean Plateau 9240 34.1 27.9 122 28.6 28.4 101 White Mill 8700 26.7 23.6 113 23.2 24.8 94 Wolverine 7650 9.6 7.5 128 13.9 12.8 109 Younts Peak 8350 -M 15.1 * -M 16.6 * ----- ----- Basin Index (%) 120 112 WIND RIVER Burroughs Creek 8750 12.6 -M * 15.2 -M * Castle Creek 8400 2.6 -M * 7.0 -M * Cold Springs 9630 7.4 4.9 151 8.8 10.8 81 Deer Park 9700 18.2 16.2 112 20.3 21.3 95 Hobbs Park 10100 17.2 14.8 116 14.1 14.7 96 Kirwin 9550 11.2 10.0 112 12.2 12.3 99 Little Warm 9370 10.5 10.2 103 10.2 13.8 74 Owl Creek 8975 3.6 4.2 86 7.2 6.7 107 South Pass 9040 16.0 15.6 103 13.8 18.5 75 St. Lawrence Alt 8620 -M 5.4 * -M 9.8 * Togwotee Pass 9580 26.2 23.7 111 27.2 25.5 107 Townsend Creek 8700 10.8 9.6 112 12.8 13.1 98 ----- ----- Basin Index (%) 111 93 BIGHORN BASIN Bald Mtn. 9380 17.2 19.7 87 13.4 18.1 74 Bear Trap Meadow 8200 4.4 3.5 126 7.5 9.3 81 Bone Springs Div 9350 13.1 16.2 81 12.4 16.6 75 Grave Springs 8550 8.5 9.6 89 10.0 11.5 87 Kirwin 9550 11.2 10.0 112 12.2 12.3 99 Marquette 8760 8.1 -M * 10.1 -M * Middle Powder 7760 8.3 12.5 66 9.3 12.7 73 Owl Creek 8975 3.6 4.2 86 7.2 6.7 107 Powder River Pass 9480 10.0 10.2 98 -M 13.6 * Shell Creek 9580 13.9 15.3 91 11.3 14.8 76 Timber Creek 7950 2.5 4.9 51 7.0 8.4 83 ----- ----- Basin Index (%) 87 82 SHOSHONE RIVER Blackwater 9780 27.0 23.8 113 27.3 21.7 126 Evening Star 9200 28.6 24.9 115 31.5 28.6 110 Marquette 8760 8.1 -M * 10.1 -M * Sylvan Lake 8420 22.9 20.4 112 29.7 23.4 127 Sylvan Road 7120 8.7 10.0 87 17.4 17.5 99 Younts Peak 8350 -M 15.1 * -M 16.6 * ----- ----- Basin Index (%) 110 116 POWDER RIVER Bear Trap Meadow 8200 4.4 3.5 126 7.5 9.3 81 Cloud Peak Reservoir 9860 12.3 15.7 78 11.9 14.7 81 Grave Springs 8550 8.5 9.6 89 10.0 11.5 87 Hansen Sawmill 8360 5.8 5.0 116 8.4 9.5 88 Middle Powder 7760 8.3 12.5 66 9.3 12.7 73 Powder River Pass 9480 10.0 10.2 98 -M 13.6 * Soldier Park 8720 3.6 -M * 7.7 -M * ----- ----- Basin Index (%) 87 82 TONGUE RIVER Big Goose 7990 8.4 9.4 89 10.7 12.5 86 Bone Springs Div 9350 13.1 16.2 81 12.4 16.6 75 Burgess Junction 7880 8.9 12.4 72 9.2 13.4 69 Dome Lake 8880 7.9 11.8 67 9.1 14.8 61 Little Goose 8870 9.7 -M * 8.4 -M * Sucker Creek 8880 11.1 12.7 87 10.5 15.6 67 Tie Creek 6870 3.6 4.5 80 11.3 12.7 89 ----- ----- Basin Index (%) 79 74 BELLE FOURCHE Blind Park 6890 1.9 4.2 45 8.0 12.8 62 Cole Canyon 5910 4.3 2.2 195 13.0 10.3 126 ----- ----- Basin Index (%) 97 91 CHEYENNE RIVER BASIN Blind Park 6890 1.9 4.2 45 8.0 12.8 62 North Rapid Creek 6130 3.2 4.4 73 7.8 10.6 74 ----- ----- Basin Index (%) 59 68 UPPER N. PLATTE Arapaho Ridge 10960 26.7 21.4 125 27.2 24.3 112 Blackhall Mtn 9820 34.7 -M * 35.4 -M * Columbine 9160 26.4 20.7 128 30.1 26.8 112 Divide Peak 8880 21.6 19.1 113 24.9 22.7 110 Joe Wright 10120 23.4 22.2 105 31.3 27.6 113 Laprele Creek 8375 12.4 8.3 149 15.4 13.5 114 Med Bow 10500 40.3 -M * 36.4 -M * Never Summer 10280 23.2 20.6 113 20.0 -M * North French Creek 10130 31.1 32.0 97 31.6 28.3 112 Old Battle 10000 38.4 32.5 118 38.5 36.8 105 Rawah 9020 11.4 8.6 133 18.2 15.5 117 Sage Creek Basin 7850 16.4 6.6 248 17.0 15.2 112 Sand Lake 10050 31.4 30.4 103 25.9 26.6 97 South Brush Creek 8440 8.6 9.9 87 12.9 16.3 79 Tower 10500 52.0 47.8 109 48.6 41.8 116 Webber Springs 9250 26.5 22.3 119 32.8 28.2 116 Whiskey Park 8950 31.7 26.0 122 34.0 29.5 115 Willow Creek Pass 9540 17.0 12.9 132 18.4 14.3 129 Zirkel 9340 33.9 22.8 149 39.6 29.7 133 ----- ----- Basin Index (%) 119 112 SWEETWATER Deer Park 9700 18.2 16.2 112 20.3 21.3 95 Larsen Creek 9000 9.7 10.4 93 15.5 -M * South Pass 9040 16.0 15.6 103 13.8 18.5 75 ----- ----- Basin Index (%) 104 86 LOWER N. PLATTE Casper Mtn. 7900 15.5 14.5 107 13.6 16.4 83 Laprele Creek 8375 12.4 8.3 149 15.4 13.5 114 Reno Hill 8400 17.4 14.0 124 18.8 16.9 111 Windy Peak 7900 9.3 6.7 139 12.3 11.5 107 ----- ----- Basin Index (%) 126 103 LARAMIE RIVER Brooklyn Lake 10240 25.4 22.1 115 27.2 22.6 120 Cinnabar Park 9574 20.8 20.3 102 24.6 25.3 97 Crow Creek 8330 3.8 1.1 345 11.5 12.0 96 Deadman Hill 10220 22.7 16.8 135 21.1 18.7 113 Rawah 9020 11.4 8.6 133 18.2 15.5 117 Roach 9700 17.4 16.5 105 22.8 20.4 112 Windy Peak 7900 9.3 6.7 139 12.3 11.5 107 ----- ----- Basin Index (%) 120 109 S. PLATTE Black Mountain 8920 12.2 -M * 14.4 -M * Crow Creek 8330 3.8 1.1 345 11.5 12.0 96 Deadman Hill 10220 22.7 16.8 135 21.1 18.7 113 ----- ----- Basin Index (%) 148 106 LITTLE SNAKE RIVER Battle Mountain 7440 7.6 4.9 155 17.2 16.0 108 Divide Peak 8880 21.6 19.1 113 24.9 22.7 110 Elk River 8700 17.6 15.8 111 20.7 21.1 98 Little Snake River 8915 29.0 24.7 117 39.3 31.2 126 Old Battle 10000 38.4 32.5 118 38.5 36.8 105 Sage Creek Basin 7850 16.4 6.6 248 17.0 15.2 112 Sandstone RS 8150 13.0 10.4 125 19.2 19.4 99 Whiskey Park 8950 31.7 26.0 122 34.0 29.5 115 ----- ----- Basin Index (%) 125 110 UPPER GREEN RIVER Big Sandy Opening 9080 14.4 12.7 113 15.7 14.0 112 Blind Bull Sum 8650 26.3 24.0 110 20.7 20.1 103 East Rim Divide 7930 9.9 9.6 103 12.9 12.2 106 Elkhart Park G.S. 9400 14.0 11.9 118 14.9 14.0 106 Gros Ventre Summit 8750 8.1 13.2 61 13.5 13.6 99 Gunsight Pass 9820 14.2 13.6 104 16.9 14.8 114 Indian Creek 9425 25.1 23.2 108 19.9 23.5 85 Kendall R.S. 7740 9.8 8.8 111 12.5 14.7 85 Loomis Park 8240 16.1 13.1 123 18.3 17.9 102 New Fork Lake 8340 10.0 9.0 111 10.4 11.2 93 Pocket Creek 9360 15.9 -M * 16.4 -M * Snider Basin 8060 9.9 10.9 91 14.3 14.7 97 Spring Creek Divide 9000 24.9 23.5 106 25.6 24.6 104 Triple Peak 8500 25.6 19.3 133 27.5 26.2 105 ----- ----- Basin Index (%) 108 101 LOWER GREEN RIVER Blacks Fork Jct 8869 9.5 -M * 14.6 -M * Buck Pasture 9632 17.4 -M * 21.7 -M * EF Blacks Fork GS 9360 12.9 -M * 13.3 -M * Hams Fork 7840 8.9 7.1 125 12.3 11.9 103 Hewinta 9500 12.9 8.3 155 16.8 14.9 113 Hickerson Park 9122 9.9 5.6 177 13.1 11.0 119 Hole-in-Rock 9168 7.2 6.0 120 12.1 10.5 115 Indian Creek 9425 25.1 23.2 108 19.9 23.5 85 Kelley R.S. 8180 15.7 12.9 122 17.4 18.8 93 Spirit Lk 10235 17.8 -M * 18.9 -M * Steel Creek Park 10158 16.4 16.2 101 21.0 17.6 119 ----- ----- Basin Index (%) 121 104 UPPER BEAR RIVER Bear River RS 8777 10.4 -M * 17.0 -M * Bug Lake 7987 24.5 17.6 139 25.4 20.2 126 Burts Miller Ranch 8000 4.9 -M * 9.9 -M * Chalk Creek #1 9171 29.1 24.7 118 32.5 26.6 122 Hayden Fork 9130 16.6 12.2 136 25.5 22.3 114 Kelley R.S. 8180 15.7 12.9 122 17.4 18.8 93 Lily Lake 9133 14.8 11.0 135 18.2 18.2 100 Monte Cristo 8932 37.7 27.6 137 34.7 27.2 128 Salt River Summit 7640 14.9 10.0 149 18.3 17.3 106 Spring Creek Divide 9000 24.9 23.5 106 25.6 24.6 104 ----- ----- Basin Index (%) 128 113 ----------------------------------------------------------------------------- -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.