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 26 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 15.1 10.6 142 24.1 22.2 109 Black Bear 8170 42.5 37.0 115 48.6 40.9 119 Blind Bull Sum 8650 24.7 24.2 102 20.9 20.8 100 Cottonwood Creek 7670 20.3 17.0 119 29.1 26.6 109 East Rim Divide 7930 4.6 8.9 52 13.2 12.5 106 Grand Targhee 9260 47.8 43.3 110 37.1 33.5 111 Granite Creek 6770 14.4 9.3 155 23.0 20.7 111 Grassy Lake 7265 33.6 30.1 112 41.9 38.4 109 Gros Ventre Summit 8750 7.6 12.3 62 13.6 14.1 96 Gunsight Pass 9820 14.9 13.4 111 17.6 15.5 114 Lewis Lake Divide 7850 36.7 30.7 120 42.6 37.7 113 Phillips Bench 8200 30.2 25.5 118 35.5 29.9 119 Salt River Summit 7640 10.8 8.4 129 18.5 17.9 103 Snake River Station 6920 13.7 9.8 140 27.9 24.2 115 Spring Creek Divide 9000 24.3 23.9 102 26.0 25.5 102 Thumb Divide 7980 16.4 14.1 116 21.0 20.3 103 Togwotee Pass 9580 25.5 24.5 104 27.6 26.5 104 Two Ocean Plateau 9240 33.4 29.2 114 28.8 29.3 98 Willow Creek 8080 31.5 25.3 125 39.2 36.5 107 Younts Peak 8350 -M 15.1 * -M 17.1 * ----- ----- Basin Index (%) 113 109 MADISON-GALLATIN Black Bear 8170 42.5 37.0 115 48.6 40.9 119 Canyon 7870 13.2 11.6 114 18.2 17.5 104 Madison Plateau 7750 29.9 22.4 133 31.2 28.2 111 West Yellowstone 6700 4.5 4.7 96 19.0 15.5 123 Whiskey Creek 6800 17.1 15.4 111 23.8 21.8 109 ----- ----- Basin Index (%) 118 114 YELLOWSTONE Beartooth Lake 9360 23.9 23.5 102 22.3 21.3 105 Burnt Mtn 5880 2.8 .0 * 16.2 14.9 109 Canyon 7870 13.2 11.6 114 18.2 17.5 104 Cole Creek 7850 18.1 16.3 111 -M 15.5 * Evening Star 9200 27.9 24.6 113 32.6 29.6 110 Fisher Creek 9100 36.1 33.2 109 39.4 34.3 115 Northeast Entrance 7350 4.8 4.9 98 16.1 13.4 120 Parker Peak 9400 26.7 21.8 122 27.0 19.4 139 Sylvan Lake 8420 21.2 20.3 104 30.2 24.3 124 Thumb Divide 7980 16.4 14.1 116 21.0 20.3 103 Two Ocean Plateau 9240 33.4 29.2 114 28.8 29.3 98 White Mill 8700 26.8 23.8 113 23.4 25.6 91 Wolverine 7650 5.1 5.2 98 14.1 13.3 106 Younts Peak 8350 -M 15.1 * -M 17.1 * ----- ----- Basin Index (%) 112 110 WIND RIVER Burroughs Creek 8750 9.7 -M * 15.5 -M * Castle Creek 8400 .0 -M * 7.6 -M * Cold Springs 9630 5.0 2.7 185 9.5 11.7 81 Deer Park 9700 16.3 16.3 100 20.8 22.8 91 Hobbs Park 10100 16.8 15.7 107 14.9 15.9 94 Kirwin 9550 10.4 10.2 102 12.5 13.1 95 Little Warm 9370 9.2 9.4 98 10.4 14.6 71 Owl Creek 8975 1.4 2.3 61 8.2 7.4 111 South Pass 9040 14.4 15.2 95 14.2 19.6 72 St. Lawrence Alt 8620 -M 4.6 * -M 10.9 * Togwotee Pass 9580 25.5 24.5 104 27.6 26.5 104 Townsend Creek 8700 9.7 8.7 111 13.3 14.3 93 ----- ----- Basin Index (%) 104 90 BIGHORN BASIN Bald Mtn. 9380 16.9 20.5 82 13.8 18.9 73 Bear Trap Meadow 8200 .1 1.7 6 7.5 10.0 75 Bone Springs Div 9350 13.7 16.4 84 12.9 17.4 74 Grave Springs 8550 7.8 9.2 85 10.4 12.3 85 Kirwin 9550 10.4 10.2 102 12.5 13.1 95 Marquette 8760 7.1 -M * 10.7 -M * Middle Powder 7760 6.3 12.2 52 10.0 13.5 74 Owl Creek 8975 1.4 2.3 61 8.2 7.4 111 Powder River Pass 9480 8.7 10.1 86 -M 14.3 * Shell Creek 9580 14.2 15.9 89 11.6 15.5 75 Timber Creek 7950 .2 3.6 6 7.7 9.2 84 ----- ----- Basin Index (%) 78 81 SHOSHONE RIVER Blackwater 9780 27.2 24.6 111 27.8 22.7 122 Evening Star 9200 27.9 24.6 113 32.6 29.6 110 Marquette 8760 7.1 -M * 10.7 -M * Sylvan Lake 8420 21.2 20.3 104 30.2 24.3 124 Sylvan Road 7120 3.5 7.9 44 17.8 18.0 99 Younts Peak 8350 -M 15.1 * -M 17.1 * ----- ----- Basin Index (%) 103 115 POWDER RIVER Bear Trap Meadow 8200 .1 1.7 6 7.5 10.0 75 Cloud Peak Reservoir 9860 12.4 16.4 76 12.1 15.8 77 Grave Springs 8550 7.8 9.2 85 10.4 12.3 85 Hansen Sawmill 8360 4.2 4.1 102 8.9 10.3 86 Middle Powder 7760 6.3 12.2 52 10.0 13.5 74 Powder River Pass 9480 8.7 10.1 86 -M 14.3 * Soldier Park 8720 1.3 -M * 7.9 -M * ----- ----- Basin Index (%) 74 79 TONGUE RIVER Big Goose 7990 7.3 9.1 80 11.1 13.5 82 Bone Springs Div 9350 13.7 16.4 84 12.9 17.4 74 Burgess Junction 7880 7.8 12.4 63 9.4 14.1 67 Dome Lake 8880 6.7 11.8 57 9.9 15.6 63 Little Goose 8870 8.6 -M * 8.8 -M * Sucker Creek 8880 9.8 12.6 78 10.9 16.6 66 Tie Creek 6870 1.2 3.2 38 11.7 13.6 86 ----- ----- Basin Index (%) 71 73 BELLE FOURCHE Blind Park 6890 -M 3.2 * 8.4 13.7 61 Cole Canyon 5910 .0 .6 0 13.3 11.0 121 ----- ----- Basin Index (%) 0 88 CHEYENNE RIVER BASIN Blind Park 6890 -M 3.2 * 8.4 13.7 61 North Rapid Creek 6130 -M 3.1 * -M 11.7 * ----- ----- Basin Index (%) * 61 UPPER N. PLATTE Arapaho Ridge 10960 23.9 21.9 109 27.4 25.6 107 Blackhall Mtn 9820 32.3 -M * 35.4 -M * Columbine 9160 20.3 20.3 100 30.2 27.8 109 Divide Peak 8880 15.7 18.0 87 24.8 23.7 105 Joe Wright 10120 20.9 23.4 89 31.7 29.0 109 Laprele Creek 8375 8.3 7.2 115 15.6 14.5 108 Med Bow 10500 41.0 -M * 37.8 -M * Never Summer 10280 23.2 21.3 109 20.4 -M * North French Creek 10130 30.6 32.8 93 32.3 29.8 108 Old Battle 10000 37.7 34.3 110 38.5 38.2 101 Rawah 9020 7.3 8.0 91 18.3 16.7 110 Sage Creek Basin 7850 10.3 2.2 468 17.4 15.7 111 Sand Lake 10050 -M 31.1 * -M 28.1 * South Brush Creek 8440 3.1 10.0 31 13.2 17.2 77 Tower 10500 49.9 49.5 101 48.9 43.6 112 Webber Springs 9250 24.0 21.9 110 32.7 29.2 112 Whiskey Park 8950 27.3 25.6 107 34.0 30.7 111 Willow Creek Pass 9540 16.4 13.8 119 18.6 15.2 122 Zirkel 9340 27.6 22.1 125 39.5 30.4 130 ----- ----- Basin Index (%) 104 109 SWEETWATER Deer Park 9700 16.3 16.3 100 20.8 22.8 91 Larsen Creek 9000 5.6 9.7 58 15.7 -M * South Pass 9040 14.4 15.2 95 14.2 19.6 72 ----- ----- Basin Index (%) 88 83 LOWER N. PLATTE Casper Mtn. 7900 12.4 14.2 87 14.0 17.3 81 Laprele Creek 8375 8.3 7.2 115 15.6 14.5 108 Reno Hill 8400 15.3 13.7 112 19.3 18.1 107 Windy Peak 7900 6.0 5.8 103 12.7 12.5 102 ----- ----- Basin Index (%) 103 99 LARAMIE RIVER Brooklyn Lake 10240 24.3 22.9 106 28.2 23.9 118 Cinnabar Park 9574 19.6 20.0 98 25.4 26.3 97 Crow Creek 8330 .0 .0 * 11.9 12.9 92 Deadman Hill 10220 21.3 18.3 116 21.3 20.0 106 Rawah 9020 7.3 8.0 91 18.3 16.7 110 Roach 9700 15.2 16.9 90 23.0 21.6 106 Windy Peak 7900 6.0 5.8 103 12.7 12.5 102 ----- ----- Basin Index (%) 102 105 S. PLATTE Black Mountain 8920 10.3 -M * 15.2 -M * Crow Creek 8330 .0 .0 * 11.9 12.9 92 Deadman Hill 10220 21.3 18.3 116 21.3 20.0 106 ----- ----- Basin Index (%) 116* 101 LITTLE SNAKE RIVER Battle Mountain 7440 2.4 1.6 150 17.1 16.7 102 Divide Peak 8880 15.7 18.0 87 24.8 23.7 105 Elk River 8700 12.4 14.4 86 20.8 22.1 94 Little Snake River 8915 24.8 23.2 107 39.3 31.8 124 Old Battle 10000 37.7 34.3 110 38.5 38.2 101 Sage Creek Basin 7850 10.3 2.2 468 17.4 15.7 111 Sandstone RS 8150 7.7 8.2 94 19.1 20.2 95 Whiskey Park 8950 27.3 25.6 107 34.0 30.7 111 ----- ----- Basin Index (%) 108 106 UPPER GREEN RIVER Big Sandy Opening 9080 14.0 12.0 117 16.3 14.7 111 Blind Bull Sum 8650 24.7 24.2 102 20.9 20.8 100 East Rim Divide 7930 4.6 8.9 52 13.2 12.5 106 Elkhart Park G.S. 9400 13.4 11.8 114 15.7 14.5 108 Gros Ventre Summit 8750 7.6 12.3 62 13.6 14.1 96 Gunsight Pass 9820 14.9 13.4 111 17.6 15.5 114 Indian Creek 9425 22.7 23.8 95 20.2 24.3 83 Kendall R.S. 7740 6.0 6.3 95 12.7 15.0 85 Loomis Park 8240 12.9 11.6 111 18.7 18.4 102 New Fork Lake 8340 6.7 7.2 93 10.9 11.6 94 Pocket Creek 9360 14.5 -M * 16.7 -M * Snider Basin 8060 5.7 10.0 57 14.5 15.2 95 Spring Creek Divide 9000 24.3 23.9 102 26.0 25.5 102 Triple Peak 8500 21.5 18.9 114 28.2 27.1 104 ----- ----- Basin Index (%) 97 100 LOWER GREEN RIVER Blacks Fork Jct 8869 6.4 -M * 14.9 -M * Buck Pasture 9632 15.1 -M * 22.3 -M * EF Blacks Fork GS 9360 9.6 -M * 13.6 -M * Hams Fork 7840 4.4 4.6 96 13.4 12.6 106 Hewinta 9500 8.7 6.5 134 17.0 15.6 109 Hickerson Park 9122 6.3 5.1 124 13.4 11.6 116 Hole-in-Rock 9168 4.2 4.6 91 12.8 11.1 115 Indian Creek 9425 22.7 23.8 95 20.2 24.3 83 Kelley R.S. 8180 12.8 11.8 108 17.8 19.6 91 Spirit Lk 10235 15.5 -M * 19.0 -M * Steel Creek Park 10158 17.0 16.6 102 21.6 18.5 117 ----- ----- Basin Index (%) 104 103 UPPER BEAR RIVER Bear River RS 8777 6.1 -M * 17.1 -M * Bug Lake 7987 21.0 16.2 130 26.5 21.1 126 Burts Miller Ranch 8000 -M -M * 10.0 -M * Chalk Creek #1 9171 26.1 24.7 106 32.4 27.7 117 Hayden Fork 9130 11.9 10.4 114 25.6 23.1 111 Kelley R.S. 8180 12.8 11.8 108 17.8 19.6 91 Lily Lake 9133 12.1 9.8 123 18.3 19.0 96 Monte Cristo 8932 35.5 27.3 130 35.5 28.4 125 Salt River Summit 7640 10.8 8.4 129 18.5 17.9 103 Spring Creek Divide 9000 24.3 23.9 102 26.0 25.5 102 ----- ----- Basin Index (%) 117 110 ----------------------------------------------------------------------------- -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.