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 9 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 17.4 15.1 115 21.2 20.8 102 Black Bear 8170 42.6 36.9 115 44.1 38.0 116 Blind Bull Sum 8650 23.8 23.4 102 18.6 19.4 96 Cottonwood Creek 7670 20.4 20.9 98 25.4 24.5 104 East Rim Divide 7930 10.6 10.2 104 11.6 11.7 99 Grand Targhee 9260 43.6 39.0 112 31.7 30.8 103 Granite Creek 6770 17.1 14.1 121 20.2 19.6 103 Grassy Lake 7265 34.2 31.4 109 37.5 35.8 105 Gros Ventre Summit 8750 8.9 12.8 70 11.7 12.9 91 Gunsight Pass 9820 12.7 13.9 91 15.2 13.9 109 Lewis Lake Divide 7850 36.0 30.1 120 38.4 35.2 109 Phillips Bench 8200 28.5 25.6 111 31.6 28.0 113 Salt River Summit 7640 13.0 12.6 103 16.1 16.6 97 Snake River Station 6920 19.0 14.6 130 25.5 22.4 114 Spring Creek Divide 9000 23.0 22.6 102 23.4 23.7 99 Thumb Divide 7980 19.1 14.7 130 19.0 18.5 103 Togwotee Pass 9580 23.6 22.3 106 24.5 24.2 101 Two Ocean Plateau 9240 30.7 26.3 117 25.8 27.1 95 Willow Creek 8080 31.7 28.3 112 34.4 33.5 103 Younts Peak 8350 -M 14.5 * -M 15.7 * ----- ----- Basin Index (%) 110 104 MADISON-GALLATIN Black Bear 8170 42.6 36.9 115 44.1 38.0 116 Canyon 7870 13.6 12.4 110 16.3 16.1 101 Madison Plateau 7750 29.0 21.7 134 28.4 26.2 108 West Yellowstone 6700 12.3 9.1 135 17.7 14.1 126 Whiskey Creek 6800 19.7 14.8 133 21.1 20.0 106 ----- ----- Basin Index (%) 123 112 YELLOWSTONE Beartooth Lake 9360 21.3 21.5 99 19.5 19.6 99 Burnt Mtn 5880 6.0 4.0 150 12.7 13.1 97 Canyon 7870 13.6 12.4 110 16.3 16.1 101 Cole Creek 7850 15.3 14.9 103 -M 13.1 * Evening Star 9200 26.3 23.9 110 28.8 27.2 106 Fisher Creek 9100 -M 31.3 * -M 31.4 * Northeast Entrance 7350 9.4 8.8 107 14.6 12.2 120 Parker Peak 9400 23.7 19.7 120 23.9 17.6 136 Sylvan Lake 8420 21.4 19.5 110 27.2 22.2 123 Thumb Divide 7980 19.1 14.7 130 19.0 18.5 103 Two Ocean Plateau 9240 30.7 26.3 117 25.8 27.1 95 White Mill 8700 24.5 22.5 109 20.7 23.6 88 Wolverine 7650 10.2 9.6 106 12.7 12.2 104 Younts Peak 8350 -M 14.5 * -M 15.7 * ----- ----- Basin Index (%) 112 106 WIND RIVER Burroughs Creek 8750 10.4 -M * 12.5 -M * Castle Creek 8400 3.3 -M * 5.7 -M * Cold Springs 9630 6.7 6.5 103 7.5 10.0 75 Deer Park 9700 15.2 16.0 95 17.4 20.0 87 Hobbs Park 10100 14.0 14.3 98 11.0 13.6 81 Kirwin 9550 10.2 9.6 106 10.9 11.6 94 Little Warm 9370 9.1 10.3 88 9.3 12.9 72 Owl Creek 8975 3.9 5.8 67 5.9 6.1 97 South Pass 9040 13.3 15.5 86 11.4 17.5 65 St. Lawrence Alt 8620 -M 6.9 * -M 9.0 * Togwotee Pass 9580 23.6 22.3 106 24.5 24.2 101 Townsend Creek 8700 9.5 9.8 97 10.7 12.2 88 ----- ----- Basin Index (%) 96 85 BIGHORN BASIN Bald Mtn. 9380 16.0 19.2 83 12.0 17.0 71 Bear Trap Meadow 8200 5.8 4.8 121 7.0 8.7 80 Bone Springs Div 9350 12.2 17.0 72 11.0 15.6 71 Grave Springs 8550 7.8 9.5 82 9.0 10.7 84 Kirwin 9550 10.2 9.6 106 10.9 11.6 94 Marquette 8760 7.1 -M * 8.9 -M * Middle Powder 7760 7.5 12.2 61 7.1 11.8 60 Owl Creek 8975 3.9 5.8 67 5.9 6.1 97 Powder River Pass 9480 9.2 10.3 89 10.1 12.7 80 Shell Creek 9580 12.7 15.3 83 11.0 13.8 80 Timber Creek 7950 3.0 5.1 59 5.9 7.4 80 ----- ----- Basin Index (%) 81 78 SHOSHONE RIVER Blackwater 9780 24.0 22.8 105 24.4 20.5 119 Evening Star 9200 26.3 23.9 110 28.8 27.2 106 Marquette 8760 7.1 -M * 8.9 -M * Sylvan Lake 8420 21.4 19.5 110 27.2 22.2 123 Sylvan Road 7120 9.1 10.6 86 15.6 16.6 94 Younts Peak 8350 -M 14.5 * -M 15.7 * ----- ----- Basin Index (%) 105 111 POWDER RIVER Bear Trap Meadow 8200 5.8 4.8 121 7.0 8.7 80 Cloud Peak Reservoir 9860 11.0 15.0 73 10.4 13.5 77 Grave Springs 8550 7.8 9.5 82 9.0 10.7 84 Hansen Sawmill 8360 5.1 6.1 84 7.1 8.7 82 Middle Powder 7760 7.5 12.2 61 7.1 11.8 60 Powder River Pass 9480 9.2 10.3 89 10.1 12.7 80 Soldier Park 8720 3.5 -M * 6.6 -M * ----- ----- Basin Index (%) 80 77 TONGUE RIVER Big Goose 7990 7.5 9.8 77 9.4 11.7 80 Bone Springs Div 9350 12.2 17.0 72 11.0 15.6 71 Burgess Junction 7880 8.1 12.0 68 8.4 12.4 68 Dome Lake 8880 6.7 11.8 57 7.8 13.8 57 Little Goose 8870 8.7 -M * 7.5 -M * Sucker Creek 8880 10.1 12.4 81 9.7 14.5 67 Tie Creek 6870 3.0 5.5 55 9.6 11.9 81 ----- ----- Basin Index (%) 69 70 BELLE FOURCHE Blind Park 6890 3.7 6.8 54 7.5 12.0 62 Cole Canyon 5910 4.0 4.6 87 10.8 9.6 112 ----- ----- Basin Index (%) 68 85 CHEYENNE RIVER BASIN Blind Park 6890 3.7 6.8 54 7.5 12.0 62 North Rapid Creek 6130 4.2 6.4 66 6.9 10.0 69 ----- ----- Basin Index (%) 60 65 UPPER N. PLATTE Arapaho Ridge 10960 25.4 21.1 120 25.8 22.8 113 Blackhall Mtn 9820 32.8 -M * 33.5 -M * Columbine 9160 28.4 23.3 122 28.7 25.6 112 Divide Peak 8880 21.9 20.1 109 23.9 21.5 111 Joe Wright 10120 22.0 21.5 102 29.9 25.9 115 Laprele Creek 8375 12.8 9.4 136 14.7 12.6 117 Med Bow 10500 36.9 -M * 34.4 -M * Never Summer 10280 -M 20.4 * 18.9 -M * North French Creek 10130 30.4 30.0 101 30.4 26.9 113 Old Battle 10000 36.8 31.6 116 37.1 35.2 105 Rawah 9020 12.2 10.6 115 17.5 14.6 120 Sage Creek Basin 7850 18.4 11.4 161 16.6 14.7 113 Sand Lake 10050 29.6 29.3 101 24.6 25.0 98 South Brush Creek 8440 9.3 11.8 79 12.4 15.3 81 Tower 10500 51.5 46.3 111 45.3 40.0 113 Webber Springs 9250 26.0 23.2 112 31.6 26.8 118 Whiskey Park 8950 31.7 27.6 115 32.9 28.1 117 Willow Creek Pass 9540 16.3 12.3 133 17.4 13.5 129 Zirkel 9340 33.9 26.1 130 37.5 28.6 131 ----- ----- Basin Index (%) 114 113 SWEETWATER Deer Park 9700 15.2 16.0 95 17.4 20.0 87 Larsen Creek 9000 9.8 11.4 86 14.2 -M * South Pass 9040 13.3 15.5 86 11.4 17.5 65 ----- ----- Basin Index (%) 89 77 LOWER N. PLATTE Casper Mtn. 7900 15.3 14.4 106 12.6 15.2 83 Laprele Creek 8375 12.8 9.4 136 14.7 12.6 117 Reno Hill 8400 16.5 14.1 117 17.6 15.7 112 Windy Peak 7900 10.2 7.6 134 11.9 10.6 112 ----- ----- Basin Index (%) 120 105 LARAMIE RIVER Brooklyn Lake 10240 24.1 22.1 109 25.5 21.2 120 Cinnabar Park 9574 20.3 21.4 95 23.6 24.3 97 Crow Creek 8330 5.2 6.8 76 10.5 11.0 95 Deadman Hill 10220 21.3 16.3 131 20.0 17.4 115 Rawah 9020 12.2 10.6 115 17.5 14.6 120 Roach 9700 17.6 16.6 106 21.9 19.3 113 Windy Peak 7900 10.2 7.6 134 11.9 10.6 112 ----- ----- Basin Index (%) 109 111 S. PLATTE Black Mountain 8920 11.6 -M * 13.0 -M * Crow Creek 8330 5.2 6.8 76 10.5 11.0 95 Deadman Hill 10220 21.3 16.3 131 20.0 17.4 115 ----- ----- Basin Index (%) 115 107 LITTLE SNAKE RIVER Battle Mountain 7440 10.4 9.0 116 16.7 15.1 111 Divide Peak 8880 21.9 20.1 109 23.9 21.5 111 Elk River 8700 18.6 18.9 98 19.6 20.1 98 Little Snake River 8915 28.8 25.8 112 37.8 30.1 126 Old Battle 10000 36.8 31.6 116 37.1 35.2 105 Sage Creek Basin 7850 18.4 11.4 161 16.6 14.7 113 Sandstone RS 8150 15.0 12.7 118 18.9 18.4 103 Whiskey Park 8950 31.7 27.6 115 32.9 28.1 117 ----- ----- Basin Index (%) 116 111 UPPER GREEN RIVER Big Sandy Opening 9080 13.1 12.8 102 14.4 13.3 108 Blind Bull Sum 8650 23.8 23.4 102 18.6 19.4 96 East Rim Divide 7930 10.6 10.2 104 11.6 11.7 99 Elkhart Park G.S. 9400 13.3 12.3 108 13.8 13.3 104 Gros Ventre Summit 8750 8.9 12.8 70 11.7 12.9 91 Gunsight Pass 9820 12.7 13.9 91 15.2 13.9 109 Indian Creek 9425 23.1 24.8 93 18.2 22.5 81 Kendall R.S. 7740 10.2 11.2 91 11.5 14.1 82 Loomis Park 8240 14.8 13.8 107 16.7 17.3 97 New Fork Lake 8340 9.9 10.2 97 9.7 10.8 90 Pocket Creek 9360 14.5 -M * 15.3 -M * Snider Basin 8060 10.8 12.3 88 13.5 14.1 96 Spring Creek Divide 9000 23.0 22.6 102 23.4 23.7 99 Triple Peak 8500 23.9 21.6 111 25.0 25.2 99 ----- ----- Basin Index (%) 98 96 LOWER GREEN RIVER Blacks Fork Jct 8869 8.2 -M * 12.3 -M * Buck Pasture 9632 14.1 -M * 18.2 -M * EF Blacks Fork GS 9360 10.5 -M * 10.5 -M * Hams Fork 7840 9.4 10.3 91 11.6 11.4 102 Hewinta 9500 9.9 10.8 92 14.2 14.1 101 Hickerson Park 9122 8.8 7.9 111 10.9 10.3 106 Hole-in-Rock 9168 6.3 7.1 89 10.1 9.8 103 Indian Creek 9425 23.1 24.8 93 18.2 22.5 81 Kelley R.S. 8180 14.9 14.5 103 15.8 18.1 87 Spirit Lk 10235 15.5 -M * 16.4 -M * Steel Creek Park 10158 14.4 15.9 91 17.4 16.6 105 ----- ----- Basin Index (%) 95 96 UPPER BEAR RIVER Bear River RS 8777 9.0 -M * 14.5 -M * Bug Lake 7987 23.2 18.7 124 23.4 19.4 121 Burts Miller Ranch 8000 4.5 -M * 8.3 -M * Chalk Creek #1 9171 24.8 24.5 101 29.1 25.3 115 Hayden Fork 9130 14.6 15.2 96 22.5 21.2 106 Kelley R.S. 8180 14.9 14.5 103 15.8 18.1 87 Lily Lake 9133 11.9 12.8 93 15.7 17.3 91 Monte Cristo 8932 33.8 27.8 122 31.4 26.0 121 Salt River Summit 7640 13.0 12.6 103 16.1 16.6 97 Spring Creek Divide 9000 23.0 22.6 102 23.4 23.7 99 ----- ----- Basin Index (%) 107 106 ----------------------------------------------------------------------------- -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.