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 TUESDAY: APRIL 23 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 16.5 11.3 146 24.0 22.0 109 Black Bear 8170 -M 36.8 * 48.6 40.3 121 Blind Bull Sum 8650 25.2 24.3 104 20.8 20.5 101 Cottonwood Creek 7670 21.4 17.8 120 29.0 26.2 111 East Rim Divide 7930 7.5 9.3 81 13.0 12.3 106 Grand Targhee 9260 47.2 42.7 111 36.8 33.0 112 Granite Creek 6770 16.0 10.0 160 22.8 20.5 111 Grassy Lake 7265 34.3 30.6 112 41.5 37.8 110 Gros Ventre Summit 8750 8.9 12.9 69 13.4 13.9 96 Gunsight Pass 9820 15.0 13.6 110 17.5 15.2 115 Lewis Lake Divide 7850 38.9 30.7 127 42.7 37.2 115 Phillips Bench 8200 31.3 25.3 124 35.1 29.5 119 Salt River Summit 7640 12.8 8.9 144 18.5 17.6 105 Snake River Station 6920 15.7 10.9 144 27.9 23.8 117 Spring Creek Divide 9000 24.9 23.6 106 25.9 25.2 103 Thumb Divide 7980 18.3 14.3 128 21.0 20.0 105 Togwotee Pass 9580 25.9 24.3 107 27.3 26.0 105 Two Ocean Plateau 9240 34.4 28.7 120 28.8 28.9 100 Willow Creek 8080 33.3 26.4 126 39.2 35.8 109 Younts Peak 8350 -M 15.1 * -M 16.9 * ----- ----- Basin Index (%) 117 110 MADISON-GALLATIN Black Bear 8170 -M 36.8 * 48.6 40.3 121 Canyon 7870 13.8 12.0 115 18.1 17.2 105 Madison Plateau 7750 31.4 22.8 138 31.1 27.8 112 West Yellowstone 6700 6.6 6.0 110 18.8 15.3 123 Whiskey Creek 6800 18.3 15.4 119 23.7 21.5 110 ----- ----- Basin Index (%) 125 115 YELLOWSTONE Beartooth Lake 9360 23.7 23.6 100 22.1 21.0 105 Burnt Mtn 5880 4.2 .0 * 16.1 14.5 111 Canyon 7870 13.8 12.0 115 18.1 17.2 105 Cole Creek 7850 18.4 16.4 112 -M 14.9 * Evening Star 9200 28.3 24.4 116 32.2 29.1 111 Fisher Creek 9100 36.3 33.0 110 39.2 33.8 116 Northeast Entrance 7350 6.4 5.7 112 15.9 13.1 121 Parker Peak 9400 26.8 21.4 125 26.9 19.1 141 Sylvan Lake 8420 21.9 20.3 108 30.0 24.0 125 Thumb Divide 7980 18.3 14.3 128 21.0 20.0 105 Two Ocean Plateau 9240 34.4 28.7 120 28.8 28.9 100 White Mill 8700 27.0 23.7 114 23.2 25.2 92 Wolverine 7650 7.1 6.2 115 14.2 13.1 108 Younts Peak 8350 -M 15.1 * -M 16.9 * ----- ----- Basin Index (%) 116 111 WIND RIVER Burroughs Creek 8750 11.3 -M * 15.4 -M * Castle Creek 8400 1.4 -M * 7.6 -M * Cold Springs 9630 6.4 3.9 164 9.3 11.3 82 Deer Park 9700 17.7 16.4 108 20.4 22.1 92 Hobbs Park 10100 17.4 15.3 114 14.9 15.3 97 Kirwin 9550 11.2 10.1 111 12.4 12.8 97 Little Warm 9370 10.2 9.9 103 10.3 14.2 73 Owl Creek 8975 3.0 3.2 94 8.1 7.1 114 South Pass 9040 15.6 15.3 102 14.0 19.0 74 St. Lawrence Alt 8620 -M 5.1 * -M 10.3 * Togwotee Pass 9580 25.9 24.3 107 27.3 26.0 105 Townsend Creek 8700 10.6 9.0 118 13.2 13.7 96 ----- ----- Basin Index (%) 110 92 BIGHORN BASIN Bald Mtn. 9380 17.1 20.1 85 13.6 18.5 74 Bear Trap Meadow 8200 2.2 2.5 88 7.4 9.7 76 Bone Springs Div 9350 13.7 16.3 84 12.8 17.1 75 Grave Springs 8550 8.0 9.4 85 10.0 11.9 84 Kirwin 9550 11.2 10.1 111 12.4 12.8 97 Marquette 8760 7.8 -M * 10.4 -M * Middle Powder 7760 7.2 12.4 58 9.3 13.1 71 Owl Creek 8975 3.0 3.2 94 8.1 7.1 114 Powder River Pass 9480 9.4 10.2 92 -M 14.0 * Shell Creek 9580 14.0 15.7 89 11.5 15.1 76 Timber Creek 7950 1.7 4.2 40 7.7 8.8 88 ----- ----- Basin Index (%) 84 81 SHOSHONE RIVER Blackwater 9780 27.0 24.1 112 27.5 22.2 124 Evening Star 9200 28.3 24.4 116 32.2 29.1 111 Marquette 8760 7.8 -M * 10.4 -M * Sylvan Lake 8420 21.9 20.3 108 30.0 24.0 125 Sylvan Road 7120 5.9 8.9 66 17.5 17.8 98 Younts Peak 8350 -M 15.1 * -M 16.9 * ----- ----- Basin Index (%) 107 115 POWDER RIVER Bear Trap Meadow 8200 2.2 2.5 88 7.4 9.7 76 Cloud Peak Reservoir 9860 12.4 16.1 77 11.9 15.3 78 Grave Springs 8550 8.0 9.4 85 10.0 11.9 84 Hansen Sawmill 8360 5.0 4.5 111 8.8 9.9 89 Middle Powder 7760 7.2 12.4 58 9.3 13.1 71 Powder River Pass 9480 9.4 10.2 92 -M 14.0 * Soldier Park 8720 2.0 -M * 7.8 -M * ----- ----- Basin Index (%) 80 79 TONGUE RIVER Big Goose 7990 7.7 9.2 84 10.9 13.1 83 Bone Springs Div 9350 13.7 16.3 84 12.8 17.1 75 Burgess Junction 7880 8.2 12.6 65 9.1 13.7 66 Dome Lake 8880 7.0 11.8 59 -M 15.2 * Little Goose 8870 9.0 -M * 8.7 -M * Sucker Creek 8880 10.3 12.7 81 -M 16.1 * Tie Creek 6870 2.1 3.9 54 11.6 13.3 87 ----- ----- Basin Index (%) 74 78 BELLE FOURCHE Blind Park 6890 -M 3.9 * 8.3 13.4 62 Cole Canyon 5910 1.8 1.4 129 13.2 10.7 123 ----- ----- Basin Index (%) 129 89 CHEYENNE RIVER BASIN Blind Park 6890 -M 3.9 * 8.3 13.4 62 North Rapid Creek 6130 1.1 3.9 28 8.1 11.4 71 ----- ----- Basin Index (%) 28 66 UPPER N. PLATTE Arapaho Ridge 10960 26.6 21.5 124 27.4 24.7 111 Blackhall Mtn 9820 33.6 -M * 35.4 -M * Columbine 9160 23.0 20.7 111 30.1 27.3 110 Divide Peak 8880 18.2 18.3 99 24.7 23.2 106 Joe Wright 10120 22.3 22.7 98 31.6 28.3 112 Laprele Creek 8375 10.2 7.4 138 15.5 14.0 111 Med Bow 10500 41.2 -M * 37.7 -M * Never Summer 10280 23.1 20.9 111 20.3 -M * North French Creek 10130 31.1 32.2 97 32.3 29.1 111 Old Battle 10000 38.2 33.5 114 38.5 37.5 103 Rawah 9020 9.5 8.1 117 18.3 15.8 116 Sage Creek Basin 7850 13.0 4.2 310 17.4 15.4 113 Sand Lake 10050 -M 30.7 * -M 27.3 * South Brush Creek 8440 5.6 9.8 57 13.1 16.7 78 Tower 10500 50.5 48.8 103 48.9 42.9 114 Webber Springs 9250 24.8 21.8 114 32.7 28.8 114 Whiskey Park 8950 29.2 25.6 114 34.0 30.1 113 Willow Creek Pass 9540 17.0 13.5 126 18.5 14.7 126 Zirkel 9340 30.1 22.5 134 39.5 30.0 132 ----- ----- Basin Index (%) 112 112 SWEETWATER Deer Park 9700 17.7 16.4 108 20.4 22.1 92 Larsen Creek 9000 8.0 10.0 80 15.6 -M * South Pass 9040 15.6 15.3 102 14.0 19.0 74 ----- ----- Basin Index (%) 99 84 LOWER N. PLATTE Casper Mtn. 7900 14.0 14.2 99 13.8 16.9 82 Laprele Creek 8375 10.2 7.4 138 15.5 14.0 111 Reno Hill 8400 16.2 14.0 116 18.9 17.5 108 Windy Peak 7900 7.7 6.3 122 12.4 12.0 103 ----- ----- Basin Index (%) 115 100 LARAMIE RIVER Brooklyn Lake 10240 25.3 22.5 112 28.0 23.3 120 Cinnabar Park 9574 20.6 19.9 104 25.4 25.8 98 Crow Creek 8330 1.5 .2 750* 11.9 12.2 98 Deadman Hill 10220 22.5 17.7 127 21.3 19.4 110 Rawah 9020 9.5 8.1 117 18.3 15.8 116 Roach 9700 16.4 16.7 98 22.9 21.0 109 Windy Peak 7900 7.7 6.3 122 12.4 12.0 103 ----- ----- Basin Index (%) 113 108 S. PLATTE Black Mountain 8920 11.6 -M * 15.2 -M * Crow Creek 8330 1.5 .2 750* 11.9 12.2 98 Deadman Hill 10220 22.5 17.7 127 21.3 19.4 110 ----- ----- Basin Index (%) 134* 105 LITTLE SNAKE RIVER Battle Mountain 7440 5.0 2.9 172 17.1 16.3 105 Divide Peak 8880 18.2 18.3 99 24.7 23.2 106 Elk River 8700 15.7 14.8 106 20.8 21.7 96 Little Snake River 8915 26.5 23.6 112 39.4 31.3 126 Old Battle 10000 38.2 33.5 114 38.5 37.5 103 Sage Creek Basin 7850 13.0 4.2 310 17.4 15.4 113 Sandstone RS 8150 10.3 9.6 107 19.1 19.8 96 Whiskey Park 8950 29.2 25.6 114 34.0 30.1 113 ----- ----- Basin Index (%) 118 108 UPPER GREEN RIVER Big Sandy Opening 9080 14.6 12.3 119 16.3 14.4 113 Blind Bull Sum 8650 25.2 24.3 104 20.8 20.5 101 East Rim Divide 7930 7.5 9.3 81 13.0 12.3 106 Elkhart Park G.S. 9400 14.1 11.8 119 15.5 14.3 108 Gros Ventre Summit 8750 8.9 12.9 69 13.4 13.9 96 Gunsight Pass 9820 15.0 13.6 110 17.5 15.2 115 Indian Creek 9425 24.2 23.5 103 20.1 24.0 84 Kendall R.S. 7740 7.8 7.3 107 12.6 14.9 85 Loomis Park 8240 14.6 12.3 119 18.5 18.2 102 New Fork Lake 8340 8.5 8.1 105 10.7 11.5 93 Pocket Creek 9360 15.7 -M * 16.7 -M * Snider Basin 8060 7.7 10.4 74 14.4 15.0 96 Spring Creek Divide 9000 24.9 23.6 106 25.9 25.2 103 Triple Peak 8500 23.8 19.2 124 28.1 26.7 105 ----- ----- Basin Index (%) 104 100 LOWER GREEN RIVER Blacks Fork Jct 8869 8.4 -M * 14.8 -M * Buck Pasture 9632 16.5 -M * 22.1 -M * EF Blacks Fork GS 9360 11.6 -M * 13.5 -M * Hams Fork 7840 6.6 5.7 116 12.9 12.3 105 Hewinta 9500 11.4 7.4 154 17.0 15.3 111 Hickerson Park 9122 8.8 5.1 173 13.4 11.3 119 Hole-in-Rock 9168 6.3 5.5 115 12.7 10.8 118 Indian Creek 9425 24.2 23.5 103 20.1 24.0 84 Kelley R.S. 8180 14.3 12.0 119 17.8 19.3 92 Spirit Lk 10235 17.2 -M * 19.1 -M * Steel Creek Park 10158 15.2 16.4 93 21.5 18.1 119 ----- ----- Basin Index (%) 115 104 UPPER BEAR RIVER Bear River RS 8777 8.3 -M * 17.0 -M * Bug Lake 7987 23.0 16.4 140 26.4 20.7 128 Burts Miller Ranch 8000 1.9 -M * 9.9 -M * Chalk Creek #1 9171 27.8 24.5 113 32.6 27.2 120 Hayden Fork 9130 14.3 11.0 130 25.6 22.7 113 Kelley R.S. 8180 14.3 12.0 119 17.8 19.3 92 Lily Lake 9133 13.7 10.1 136 18.2 18.6 98 Monte Cristo 8932 36.9 27.3 135 35.3 27.9 127 Salt River Summit 7640 12.8 8.9 144 18.5 17.6 105 Spring Creek Divide 9000 24.9 23.6 106 25.9 25.2 103 ----- ----- Basin Index (%) 125 112 ----------------------------------------------------------------------------- -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.