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 WEDNESDAY: APRIL 3 , 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 41.7 36.8 113 41.1 37.0 111 Blind Bull Sum 8650 22.9 22.8 100 18.1 19.0 95 Cottonwood Creek 7670 20.6 21.3 97 24.7 24.0 103 East Rim Divide 7930 11.0 10.1 109 11.4 11.4 100 Grand Targhee 9260 40.9 37.2 110 30.2 30.0 101 Granite Creek 6770 18.8 14.8 127 19.8 19.2 103 Grassy Lake 7265 32.9 31.6 104 35.4 35.0 101 Gros Ventre Summit 8750 8.5 13.0 65 11.6 12.5 93 Gunsight Pass 9820 12.4 13.5 92 14.8 13.4 110 Lewis Lake Divide 7850 34.2 29.6 116 36.0 34.5 104 Phillips Bench 8200 28.4 24.6 115 30.8 27.4 112 Salt River Summit 7640 14.0 13.0 108 15.7 16.2 97 Snake River Station 6920 19.3 15.2 127 24.3 21.8 111 Spring Creek Divide 9000 22.8 22.5 101 23.1 23.2 100 Thumb Divide 7980 18.4 14.8 124 17.9 18.0 99 Togwotee Pass 9580 22.9 21.7 106 23.6 23.6 100 Two Ocean Plateau 9240 28.9 25.7 112 24.3 26.4 92 Willow Creek 8080 30.7 28.1 109 33.5 32.7 102 Younts Peak 8350 -M 14.2 * -M 15.3 * ----- ----- Basin Index (%) 109 103 MADISON-GALLATIN Black Bear 8170 41.7 36.8 113 41.1 37.0 111 Canyon 7870 13.1 12.4 106 15.0 15.7 96 Madison Plateau 7750 26.6 21.4 124 26.2 25.5 103 West Yellowstone 6700 13.1 10.2 128 16.3 13.8 118 Whiskey Creek 6800 19.0 15.0 127 19.4 19.5 99 ----- ----- Basin Index (%) 118 106 YELLOWSTONE Beartooth Lake 9360 19.0 21.2 90 17.7 19.1 93 Burnt Mtn 5880 8.2 4.5 182 12.7 12.4 102 Canyon 7870 13.1 12.4 106 15.0 15.7 96 Cole Creek 7850 15.5 13.9 112 -M 12.2 * Evening Star 9200 24.3 23.8 102 26.9 26.4 102 Fisher Creek 9100 29.2 30.6 95 32.0 30.7 104 Northeast Entrance 7350 9.6 9.4 102 12.5 11.8 106 Parker Peak 9400 22.2 18.9 117 22.7 17.0 134 Sylvan Lake 8420 20.3 19.2 106 25.9 21.6 120 Thumb Divide 7980 18.4 14.8 124 17.9 18.0 99 Two Ocean Plateau 9240 28.9 25.7 112 24.3 26.4 92 White Mill 8700 20.7 21.8 95 18.0 22.9 79 Wolverine 7650 11.1 9.3 119 12.1 11.8 103 Younts Peak 8350 -M 14.2 * -M 15.3 * ----- ----- Basin Index (%) 107 102 WIND RIVER Burroughs Creek 8750 10.4 -M * 12.2 -M * Castle Creek 8400 4.3 -M * 5.6 -M * Cold Springs 9630 6.9 7.1 97 7.4 9.7 76 Deer Park 9700 15.5 14.9 104 17.2 19.1 90 Hobbs Park 10100 14.4 13.6 106 10.9 12.8 85 Kirwin 9550 10.4 9.5 109 10.6 11.2 95 Little Warm 9370 8.9 10.2 87 8.9 12.4 72 Owl Creek 8975 4.7 5.7 82 5.8 5.8 100 South Pass 9040 13.6 15.0 91 11.1 16.9 66 St. Lawrence Alt 8620 -M 6.8 * -M 8.7 * Togwotee Pass 9580 22.9 21.7 106 23.6 23.6 100 Townsend Creek 8700 9.7 9.2 105 10.5 11.5 91 ----- ----- Basin Index (%) 100 86 BIGHORN BASIN Bald Mtn. 9380 16.1 18.9 85 11.9 16.5 72 Bear Trap Meadow 8200 7.0 5.1 137 6.8 8.2 83 Bone Springs Div 9350 12.4 16.3 76 10.9 15.0 73 Grave Springs 8550 8.1 9.0 90 8.9 10.1 88 Kirwin 9550 10.4 9.5 109 10.6 11.2 95 Marquette 8760 7.3 -M * 8.7 -M * Middle Powder 7760 9.1 11.6 78 -M 11.3 * Owl Creek 8975 4.7 5.7 82 5.8 5.8 100 Powder River Pass 9480 9.3 10.0 93 9.2 12.1 76 Shell Creek 9580 12.6 14.7 86 10.7 13.3 80 Timber Creek 7950 3.9 4.8 81 5.8 7.1 82 ----- ----- Basin Index (%) 89 81 SHOSHONE RIVER Blackwater 9780 22.7 22.3 102 22.9 19.9 115 Evening Star 9200 24.3 23.8 102 26.9 26.4 102 Marquette 8760 7.3 -M * 8.7 -M * Sylvan Lake 8420 20.3 19.2 106 25.9 21.6 120 Sylvan Road 7120 10.3 11.0 94 15.2 16.3 93 Younts Peak 8350 -M 14.2 * -M 15.3 * ----- ----- Basin Index (%) 102 108 POWDER RIVER Bear Trap Meadow 8200 7.0 5.1 137 6.8 8.2 83 Cloud Peak Reservoir 9860 11.5 14.3 80 10.1 12.8 79 Grave Springs 8550 8.1 9.0 90 8.9 10.1 88 Hansen Sawmill 8360 5.5 6.3 87 7.0 8.2 85 Middle Powder 7760 9.1 11.6 78 -M 11.3 * Powder River Pass 9480 9.3 10.0 93 9.2 12.1 76 Soldier Park 8720 4.0 -M * 6.5 -M * ----- ----- Basin Index (%) 90 82 TONGUE RIVER Big Goose 7990 7.6 9.2 83 9.4 10.9 86 Bone Springs Div 9350 12.4 16.3 76 10.9 15.0 73 Burgess Junction 7880 8.3 11.5 72 8.2 11.9 69 Dome Lake 8880 8.4 11.6 72 7.6 13.1 58 Little Goose 8870 8.6 -M * 7.5 -M * Sucker Creek 8880 10.4 11.6 90 9.4 13.9 68 Tie Creek 6870 4.6 5.5 84 9.5 11.1 86 ----- ----- Basin Index (%) 79 72 BELLE FOURCHE Blind Park 6890 6.7 7.2 93 7.4 11.4 65 Cole Canyon 5910 6.5 5.7 114 10.8 9.0 120 ----- ----- Basin Index (%) 102 89 CHEYENNE RIVER BASIN Blind Park 6890 6.7 7.2 93 7.4 11.4 65 North Rapid Creek 6130 6.3 6.7 94 6.7 9.4 71 ----- ----- Basin Index (%) 94 68 UPPER N. PLATTE Arapaho Ridge 10960 25.2 20.2 125 25.7 21.5 120 Blackhall Mtn 9820 32.7 -M * 32.9 -M * Columbine 9160 29.2 23.2 126 28.5 24.8 115 Divide Peak 8880 21.8 19.6 111 23.3 20.8 112 Joe Wright 10120 21.4 20.5 104 29.7 25.0 119 Laprele Creek 8375 13.6 9.4 145 14.3 12.1 118 Med Bow 10500 37.8 -M * 33.5 -M * Never Summer 10280 22.5 19.9 113 18.8 -M * North French Creek 10130 30.0 28.5 105 29.8 26.0 115 Old Battle 10000 36.2 30.3 119 36.5 34.1 107 Rawah 9020 14.5 10.4 139 17.4 13.7 127 Sage Creek Basin 7850 19.3 12.6 153 16.4 14.1 116 Sand Lake 10050 29.0 28.1 103 24.2 24.0 101 South Brush Creek 8440 12.1 12.2 99 12.2 14.8 82 Tower 10500 50.8 44.8 113 45.2 38.6 117 Webber Springs 9250 26.6 23.0 116 31.4 26.0 121 Whiskey Park 8950 31.7 26.5 120 32.6 27.2 120 Willow Creek Pass 9540 16.3 11.9 137 17.2 13.0 132 Zirkel 9340 34.0 26.3 129 37.2 27.6 135 ----- ----- Basin Index (%) 118 116 SWEETWATER Deer Park 9700 15.5 14.9 104 17.2 19.1 90 Larsen Creek 9000 10.8 12.0 90 14.2 -M * South Pass 9040 13.6 15.0 91 11.1 16.9 66 ----- ----- Basin Index (%) 95 79 LOWER N. PLATTE Casper Mtn. 7900 15.9 13.8 115 12.2 14.3 85 Laprele Creek 8375 13.6 9.4 145 14.3 12.1 118 Reno Hill 8400 16.8 13.6 124 16.9 14.8 114 Windy Peak 7900 11.2 7.8 144 11.6 10.2 114 ----- ----- Basin Index (%) 129 107 LARAMIE RIVER Brooklyn Lake 10240 24.1 20.7 116 25.0 20.4 123 Cinnabar Park 9574 20.6 20.4 101 23.5 23.3 101 Crow Creek 8330 6.3 7.0 90 10.6 10.4 102 Deadman Hill 10220 21.3 15.8 135 19.8 16.7 119 Rawah 9020 14.5 10.4 139 17.4 13.7 127 Roach 9700 17.9 16.0 112 21.6 18.6 116 Windy Peak 7900 11.2 7.8 144 11.6 10.2 114 ----- ----- Basin Index (%) 118 114 S. PLATTE Black Mountain 8920 12.1 -M * 12.9 -M * Crow Creek 8330 6.3 7.0 90 10.6 10.4 102 Deadman Hill 10220 21.3 15.8 135 19.8 16.7 119 ----- ----- Basin Index (%) 121 112 LITTLE SNAKE RIVER Battle Mountain 7440 13.4 10.4 129 16.5 14.6 113 Divide Peak 8880 21.8 19.6 111 23.3 20.8 112 Elk River 8700 20.4 18.9 108 19.2 19.5 98 Little Snake River 8915 29.6 23.8 124 37.5 28.9 130 Old Battle 10000 36.2 30.3 119 36.5 34.1 107 Sage Creek Basin 7850 19.3 12.6 153 16.4 14.1 116 Sandstone RS 8150 17.5 13.0 135 18.5 17.9 103 Whiskey Park 8950 31.7 26.5 120 32.6 27.2 120 ----- ----- Basin Index (%) 122 113 UPPER GREEN RIVER Big Sandy Opening 9080 13.6 12.4 110 14.4 12.8 112 Blind Bull Sum 8650 22.9 22.8 100 18.1 19.0 95 East Rim Divide 7930 11.0 10.1 109 11.4 11.4 100 Elkhart Park G.S. 9400 13.0 12.2 107 13.5 12.9 105 Gros Ventre Summit 8750 8.5 13.0 65 11.6 12.5 93 Gunsight Pass 9820 12.4 13.5 92 14.8 13.4 110 Indian Creek 9425 22.5 24.2 93 17.9 22.0 81 Kendall R.S. 7740 10.5 11.5 91 11.3 13.8 82 Loomis Park 8240 15.7 14.1 111 16.5 16.8 98 New Fork Lake 8340 10.3 10.3 100 9.4 10.5 90 Pocket Creek 9360 14.5 -M * 15.1 -M * Snider Basin 8060 11.7 12.3 95 13.3 13.9 96 Spring Creek Divide 9000 22.8 22.5 101 23.1 23.2 100 Triple Peak 8500 23.3 21.9 106 24.5 24.7 99 ----- ----- Basin Index (%) 99 97 LOWER GREEN RIVER Blacks Fork Jct 8869 9.2 -M * 12.4 -M * Buck Pasture 9632 14.9 -M * 18.0 -M * EF Blacks Fork GS 9360 11.9 -M * 10.3 -M * Hams Fork 7840 11.0 10.9 101 11.4 11.1 103 Hewinta 9500 12.9 10.9 118 14.2 13.6 104 Hickerson Park 9122 8.8 7.7 114 11.0 9.9 111 Hole-in-Rock 9168 6.5 7.0 93 10.1 9.4 107 Indian Creek 9425 22.5 24.2 93 17.9 22.0 81 Kelley R.S. 8180 15.4 15.0 103 15.6 17.6 89 Spirit Lk 10235 15.6 -M * 16.2 -M * Steel Creek Park 10158 13.8 15.5 89 17.4 16.0 109 ----- ----- Basin Index (%) 100 98 UPPER BEAR RIVER Bear River RS 8777 11.1 -M * 14.5 -M * Bug Lake 7987 23.5 18.2 129 23.0 18.9 122 Burts Miller Ranch 8000 7.3 -M * 8.3 -M * Chalk Creek #1 9171 25.4 23.8 107 28.7 24.5 117 Hayden Fork 9130 16.6 15.3 108 22.5 20.5 110 Kelley R.S. 8180 15.4 15.0 103 15.6 17.6 89 Lily Lake 9133 12.5 12.3 102 15.7 16.6 95 Monte Cristo 8932 32.9 26.9 122 30.7 25.3 121 Salt River Summit 7640 14.0 13.0 108 15.7 16.2 97 Spring Creek Divide 9000 22.8 22.5 101 23.1 23.2 100 ----- ----- Basin Index (%) 111 107 ----------------------------------------------------------------------------- -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.