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 THURSDAY: APRIL 11 , 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 14.7 118 22.0 21.0 105 Black Bear 8170 42.1 36.7 115 45.3 38.4 118 Blind Bull Sum 8650 24.3 23.5 103 19.0 19.6 97 Cottonwood Creek 7670 21.2 20.7 102 26.4 24.8 106 East Rim Divide 7930 10.5 10.2 103 11.8 11.8 100 Grand Targhee 9260 45.2 39.6 114 32.2 31.2 103 Granite Creek 6770 17.0 13.6 125 21.0 19.7 107 Grassy Lake 7265 33.3 31.4 106 38.1 36.1 106 Gros Ventre Summit 8750 9.7 12.8 76 12.5 13.1 95 Gunsight Pass 9820 13.5 13.8 98 16.0 14.1 113 Lewis Lake Divide 7850 36.5 30.2 121 39.3 35.6 110 Phillips Bench 8200 28.9 25.8 112 32.8 28.3 116 Salt River Summit 7640 13.6 12.3 111 16.6 16.8 99 Snake River Station 6920 17.8 14.2 125 25.8 22.6 114 Spring Creek Divide 9000 23.4 22.7 103 23.8 23.9 100 Thumb Divide 7980 19.4 14.6 133 19.6 18.8 104 Togwotee Pass 9580 24.5 22.6 108 25.4 24.5 104 Two Ocean Plateau 9240 31.8 26.6 120 26.7 27.4 97 Willow Creek 8080 32.3 27.8 116 35.9 33.9 106 Younts Peak 8350 -M 14.5 * -M 15.9 * ----- ----- Basin Index (%) 112 106 MADISON-GALLATIN Black Bear 8170 42.1 36.7 115 45.3 38.4 118 Canyon 7870 13.8 12.3 112 16.8 16.3 103 Madison Plateau 7750 31.2 22.0 142 29.1 26.4 110 West Yellowstone 6700 11.6 8.8 132 18.0 14.2 127 Whiskey Creek 6800 19.0 14.7 129 21.9 20.3 108 ----- ----- Basin Index (%) 125 113 YELLOWSTONE Beartooth Lake 9360 21.9 21.7 101 20.2 19.9 102 Burnt Mtn 5880 6.7 3.0 223 14.0 13.2 106 Canyon 7870 13.8 12.3 112 16.8 16.3 103 Cole Creek 7850 16.9 15.2 111 -M 13.3 * Evening Star 9200 27.0 24.1 112 29.7 27.6 108 Fisher Creek 9100 34.1 31.5 108 35.9 31.8 113 Northeast Entrance 7350 9.3 8.6 108 15.0 12.3 122 Parker Peak 9400 24.6 20.0 123 24.7 17.8 139 Sylvan Lake 8420 21.6 19.7 110 27.9 22.5 124 Thumb Divide 7980 19.4 14.6 133 19.6 18.8 104 Two Ocean Plateau 9240 31.8 26.6 120 26.7 27.4 97 White Mill 8700 25.1 22.9 110 21.4 23.9 90 Wolverine 7650 9.8 9.4 104 12.9 12.3 105 Younts Peak 8350 -M 14.5 * -M 15.9 * ----- ----- Basin Index (%) 114 109 WIND RIVER Burroughs Creek 8750 11.3 -M * 13.1 -M * Castle Creek 8400 3.4 -M * 6.3 -M * Cold Springs 9630 7.5 6.3 119 8.1 10.2 79 Deer Park 9700 16.6 16.1 103 18.4 20.4 90 Hobbs Park 10100 16.5 14.6 113 12.9 13.8 93 Kirwin 9550 11.0 9.7 113 11.5 11.7 98 Little Warm 9370 9.8 10.2 96 9.4 13.0 72 Owl Creek 8975 4.1 5.7 72 6.5 6.2 105 South Pass 9040 15.2 15.6 97 12.4 17.7 70 St. Lawrence Alt 8620 -M 6.9 * -M 9.2 * Togwotee Pass 9580 24.5 22.6 108 25.4 24.5 104 Townsend Creek 8700 11.2 9.9 113 12.1 12.4 98 ----- ----- Basin Index (%) 105 90 BIGHORN BASIN Bald Mtn. 9380 17.0 19.3 88 12.3 17.3 71 Bear Trap Meadow 8200 5.6 4.7 119 6.9 8.8 78 Bone Springs Div 9350 12.7 17.0 75 11.2 15.8 71 Grave Springs 8550 8.5 9.5 89 9.7 11.0 88 Kirwin 9550 11.0 9.7 113 11.5 11.7 98 Marquette 8760 7.8 -M * 9.6 -M * Middle Powder 7760 8.2 12.3 67 7.9 12.0 66 Owl Creek 8975 4.1 5.7 72 6.5 6.2 105 Powder River Pass 9480 10.0 10.3 97 -M 12.9 * Shell Creek 9580 13.2 15.5 85 10.9 14.0 78 Timber Creek 7950 3.0 5.1 59 6.5 7.6 86 ----- ----- Basin Index (%) 86 80 SHOSHONE RIVER Blackwater 9780 25.0 23.1 108 25.3 20.8 122 Evening Star 9200 27.0 24.1 112 29.7 27.6 108 Marquette 8760 7.8 -M * 9.6 -M * Sylvan Lake 8420 21.6 19.7 110 27.9 22.5 124 Sylvan Road 7120 8.8 10.4 85 16.2 16.8 96 Younts Peak 8350 -M 14.5 * -M 15.9 * ----- ----- Basin Index (%) 107 113 POWDER RIVER Bear Trap Meadow 8200 5.6 4.7 119 6.9 8.8 78 Cloud Peak Reservoir 9860 11.9 15.2 78 10.9 13.7 80 Grave Springs 8550 8.5 9.5 89 9.7 11.0 88 Hansen Sawmill 8360 5.7 6.1 93 8.1 8.8 92 Middle Powder 7760 8.2 12.3 67 7.9 12.0 66 Powder River Pass 9480 10.0 10.3 97 -M 12.9 * Soldier Park 8720 3.3 -M * 7.2 -M * ----- ----- Basin Index (%) 86 80 TONGUE RIVER Big Goose 7990 8.1 9.9 82 10.2 11.9 86 Bone Springs Div 9350 12.7 17.0 75 11.2 15.8 71 Burgess Junction 7880 8.8 12.2 72 8.6 12.7 68 Dome Lake 8880 7.3 11.9 61 8.2 14.0 59 Little Goose 8870 9.4 -M * 8.1 -M * Sucker Creek 8880 10.7 12.5 86 9.7 14.8 66 Tie Creek 6870 3.9 5.3 74 10.9 12.1 90 ----- ----- Basin Index (%) 75 72 BELLE FOURCHE Blind Park 6890 3.6 6.4 56 7.7 12.2 63 Cole Canyon 5910 5.4 4.3 126 12.6 9.7 130 ----- ----- Basin Index (%) 84 93 CHEYENNE RIVER BASIN Blind Park 6890 3.6 6.4 56 7.7 12.2 63 North Rapid Creek 6130 4.3 6.2 69 7.4 10.2 73 ----- ----- Basin Index (%) 63 67 UPPER N. PLATTE Arapaho Ridge 10960 26.3 21.3 123 26.4 23.2 114 Blackhall Mtn 9820 32.8 -M * 33.9 -M * Columbine 9160 26.5 23.0 115 28.5 25.9 110 Divide Peak 8880 21.5 20.3 106 24.0 21.8 110 Joe Wright 10120 22.5 21.8 103 30.6 26.2 117 Laprele Creek 8375 12.7 9.4 135 14.7 12.8 115 Med Bow 10500 36.1 -M * 34.6 -M * Never Summer 10280 21.9 20.5 107 19.4 -M * North French Creek 10130 29.9 30.7 97 30.4 27.2 112 Old Battle 10000 36.8 31.9 115 37.1 35.5 105 Rawah 9020 12.2 10.4 117 17.5 14.8 118 Sage Creek Basin 7850 18.6 10.8 172 16.5 14.9 111 Sand Lake 10050 29.4 29.8 99 24.6 25.2 98 South Brush Creek 8440 8.9 11.6 77 12.3 15.6 79 Tower 10500 51.8 46.9 110 45.5 40.3 113 Webber Springs 9250 25.9 23.3 111 31.5 27.1 116 Whiskey Park 8950 30.9 27.6 112 33.0 28.3 117 Willow Creek Pass 9540 16.7 12.5 134 17.7 13.7 129 Zirkel 9340 32.9 25.5 129 38.0 29.0 131 ----- ----- Basin Index (%) 113 112 SWEETWATER Deer Park 9700 16.6 16.1 103 18.4 20.4 90 Larsen Creek 9000 9.5 11.2 85 14.4 -M * South Pass 9040 15.2 15.6 97 12.4 17.7 70 ----- ----- Basin Index (%) 96 81 LOWER N. PLATTE Casper Mtn. 7900 16.0 14.5 110 12.9 15.4 84 Laprele Creek 8375 12.7 9.4 135 14.7 12.8 115 Reno Hill 8400 16.7 14.2 118 17.5 15.9 110 Windy Peak 7900 9.7 7.6 128 11.6 10.8 107 ----- ----- Basin Index (%) 121 103 LARAMIE RIVER Brooklyn Lake 10240 24.1 22.3 108 25.6 21.5 119 Cinnabar Park 9574 20.5 21.4 96 23.8 24.6 97 Crow Creek 8330 4.8 6.3 76 10.9 11.3 96 Deadman Hill 10220 21.5 16.5 130 20.1 17.7 114 Rawah 9020 12.2 10.4 117 17.5 14.8 118 Roach 9700 17.6 16.6 106 22.1 19.6 113 Windy Peak 7900 9.7 7.6 128 11.6 10.8 107 ----- ----- Basin Index (%) 109 109 S. PLATTE Black Mountain 8920 12.0 -M * 13.8 -M * Crow Creek 8330 4.8 6.3 76 10.9 11.3 96 Deadman Hill 10220 21.5 16.5 130 20.1 17.7 114 ----- ----- Basin Index (%) 115 107 LITTLE SNAKE RIVER Battle Mountain 7440 9.9 8.4 118 16.8 15.2 111 Divide Peak 8880 21.5 20.3 106 24.0 21.8 110 Elk River 8700 18.4 18.4 100 19.9 20.4 98 Little Snake River 8915 28.4 26.0 109 38.0 30.5 125 Old Battle 10000 36.8 31.9 115 37.1 35.5 105 Sage Creek Basin 7850 18.6 10.8 172 16.5 14.9 111 Sandstone RS 8150 14.5 12.6 115 18.9 18.6 102 Whiskey Park 8950 30.9 27.6 112 33.0 28.3 117 ----- ----- Basin Index (%) 115 110 UPPER GREEN RIVER Big Sandy Opening 9080 13.9 12.9 108 14.7 13.5 109 Blind Bull Sum 8650 24.3 23.5 103 19.0 19.6 97 East Rim Divide 7930 10.5 10.2 103 11.8 11.8 100 Elkhart Park G.S. 9400 13.5 12.3 110 13.9 13.5 103 Gros Ventre Summit 8750 9.7 12.8 76 12.5 13.1 95 Gunsight Pass 9820 13.5 13.8 98 16.0 14.1 113 Indian Creek 9425 23.3 24.8 94 18.6 22.7 82 Kendall R.S. 7740 10.0 10.9 92 11.7 14.3 82 Loomis Park 8240 15.0 13.7 109 16.9 17.4 97 New Fork Lake 8340 10.0 10.1 99 9.7 10.9 89 Pocket Creek 9360 14.8 -M * 15.3 -M * Snider Basin 8060 10.4 12.2 85 13.3 14.3 93 Spring Creek Divide 9000 23.4 22.7 103 23.8 23.9 100 Triple Peak 8500 24.2 21.0 115 25.5 25.5 100 ----- ----- Basin Index (%) 100 97 LOWER GREEN RIVER Blacks Fork Jct 8869 10.0 -M * 14.1 -M * Buck Pasture 9632 16.1 -M * 20.2 -M * EF Blacks Fork GS 9360 13.0 -M * 12.4 -M * Hams Fork 7840 9.5 9.7 98 11.8 11.5 103 Hewinta 9500 -M 10.6 * 16.4 14.4 114 Hickerson Park 9122 9.9 7.7 129 12.8 10.5 122 Hole-in-Rock 9168 7.7 7.1 108 11.7 10.0 117 Indian Creek 9425 23.3 24.8 94 18.6 22.7 82 Kelley R.S. 8180 15.1 14.3 106 16.3 18.2 90 Spirit Lk 10235 17.3 -M * 17.9 -M * Steel Creek Park 10158 17.3 16.0 108 20.2 16.9 120 ----- ----- Basin Index (%) 104 103 UPPER BEAR RIVER Bear River RS 8777 10.7 -M * 16.5 -M * Bug Lake 7987 23.7 19.0 125 24.0 19.6 122 Burts Miller Ranch 8000 5.9 -M * 9.6 -M * Chalk Creek #1 9171 27.7 24.7 112 31.1 25.6 121 Hayden Fork 9130 16.5 14.9 111 24.7 21.4 115 Kelley R.S. 8180 15.1 14.3 106 16.3 18.2 90 Lily Lake 9133 14.3 12.7 113 17.6 17.5 101 Monte Cristo 8932 34.9 27.9 125 32.2 26.3 122 Salt River Summit 7640 13.6 12.3 111 16.6 16.8 99 Spring Creek Divide 9000 23.4 22.7 103 23.8 23.9 100 ----- ----- Basin Index (%) 114 110 ----------------------------------------------------------------------------- -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.