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 SATURDAY: APRIL 27 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 14.7 10.4 141 24.2 22.3 109 Black Bear 8170 42.6 37.0 115 48.7 41.1 118 Blind Bull Sum 8650 24.6 24.1 102 21.1 20.8 101 Cottonwood Creek 7670 20.0 16.7 120 29.1 26.8 109 East Rim Divide 7930 4.0 8.8 45 13.5 12.5 108 Grand Targhee 9260 47.8 43.6 110 37.3 33.6 111 Granite Creek 6770 14.0 9.0 156 23.3 20.8 112 Grassy Lake 7265 -M 30.0 * -M 38.5 * Gros Ventre Summit 8750 7.5 12.1 62 13.7 14.2 96 Gunsight Pass 9820 15.2 13.3 114 17.9 15.5 115 Lewis Lake Divide 7850 36.2 30.7 118 42.9 37.8 113 Phillips Bench 8200 29.8 25.6 116 35.6 30.0 119 Salt River Summit 7640 10.3 8.2 126 18.5 18.0 103 Snake River Station 6920 13.5 9.4 144 28.0 24.2 116 Spring Creek Divide 9000 24.4 24.0 102 26.1 25.6 102 Thumb Divide 7980 16.0 13.9 115 21.1 20.4 103 Togwotee Pass 9580 25.6 24.6 104 27.8 26.6 105 Two Ocean Plateau 9240 33.5 29.3 114 29.0 29.5 98 Willow Creek 8080 31.0 24.9 124 39.6 36.7 108 Younts Peak 8350 -M 15.1 * -M 17.2 * ----- ----- Basin Index (%) 112 109 MADISON-GALLATIN Black Bear 8170 42.6 37.0 115 48.7 41.1 118 Canyon 7870 13.0 11.5 113 18.2 17.6 103 Madison Plateau 7750 29.5 22.2 133 31.2 28.3 110 West Yellowstone 6700 4.0 4.2 95 18.8 15.6 121 Whiskey Creek 6800 16.8 15.4 109 23.8 21.9 109 ----- ----- Basin Index (%) 117 113 YELLOWSTONE Beartooth Lake 9360 24.0 23.4 103 22.4 21.4 105 Burnt Mtn 5880 2.7 .0 * 16.6 15.0 111 Canyon 7870 13.0 11.5 113 18.2 17.6 103 Cole Creek 7850 18.5 16.3 113 -M 15.7 * Evening Star 9200 28.1 24.6 114 33.1 29.7 111 Fisher Creek 9100 36.4 33.2 110 39.9 34.4 116 Northeast Entrance 7350 4.6 4.6 100 16.6 13.4 124 Parker Peak 9400 27.1 21.8 124 27.2 19.6 139 Sylvan Lake 8420 21.0 20.3 103 30.2 24.5 123 Thumb Divide 7980 16.0 13.9 115 21.1 20.4 103 Two Ocean Plateau 9240 33.5 29.3 114 29.0 29.5 98 White Mill 8700 27.3 23.7 115 23.5 25.7 91 Wolverine 7650 4.9 4.8 102 14.4 13.4 107 Younts Peak 8350 -M 15.1 * -M 17.2 * ----- ----- Basin Index (%) 113 110 WIND RIVER Burroughs Creek 8750 9.4 -M * 15.7 -M * Castle Creek 8400 .0 -M * 7.9 -M * Cold Springs 9630 5.2 2.4 217 9.9 11.9 83 Deer Park 9700 16.4 16.3 101 20.8 22.9 91 Hobbs Park 10100 17.0 15.8 108 14.9 16.2 92 Kirwin 9550 10.4 10.2 102 12.5 13.3 94 Little Warm 9370 8.9 9.2 97 10.3 14.7 70 Owl Creek 8975 .5 2.0 25 8.2 7.5 109 South Pass 9040 13.9 15.2 91 14.2 19.8 72 St. Lawrence Alt 8620 -M 4.2 * -M 11.0 * Togwotee Pass 9580 25.6 24.6 104 27.8 26.6 105 Townsend Creek 8700 9.3 8.4 111 13.3 14.5 92 ----- ----- Basin Index (%) 103 89 BIGHORN BASIN Bald Mtn. 9380 17.1 20.6 83 13.8 19.1 72 Bear Trap Meadow 8200 .0 1.6 0 7.6 10.1 75 Bone Springs Div 9350 13.8 16.5 84 13.0 17.6 74 Grave Springs 8550 7.8 9.1 86 10.5 12.3 85 Kirwin 9550 10.4 10.2 102 12.5 13.3 94 Marquette 8760 6.6 -M * 10.8 -M * Middle Powder 7760 6.4 12.2 52 10.0 13.7 73 Owl Creek 8975 .5 2.0 25 8.2 7.5 109 Powder River Pass 9480 8.6 10.0 86 -M 14.5 * Shell Creek 9580 14.3 15.9 90 11.7 15.7 75 Timber Creek 7950 .1 3.6 3 7.8 9.3 84 ----- ----- Basin Index (%) 78 80 SHOSHONE RIVER Blackwater 9780 27.6 24.7 112 28.1 22.8 123 Evening Star 9200 28.1 24.6 114 33.1 29.7 111 Marquette 8760 6.6 -M * 10.8 -M * Sylvan Lake 8420 21.0 20.3 103 30.2 24.5 123 Sylvan Road 7120 3.2 7.5 43 17.9 18.1 99 Younts Peak 8350 -M 15.1 * -M 17.2 * ----- ----- Basin Index (%) 104 115 POWDER RIVER Bear Trap Meadow 8200 .0 1.6 0 7.6 10.1 75 Cloud Peak Reservoir 9860 12.3 16.5 75 12.1 16.0 76 Grave Springs 8550 7.8 9.1 86 10.5 12.3 85 Hansen Sawmill 8360 3.7 3.8 97 9.0 10.3 87 Middle Powder 7760 6.4 12.2 52 10.0 13.7 73 Powder River Pass 9480 8.6 10.0 86 -M 14.5 * Soldier Park 8720 .7 -M * 8.0 -M * ----- ----- Basin Index (%) 73 79 TONGUE RIVER Big Goose 7990 7.1 9.1 78 11.4 13.5 84 Bone Springs Div 9350 13.8 16.5 84 13.0 17.6 74 Burgess Junction 7880 7.6 12.3 62 9.3 14.3 65 Dome Lake 8880 6.5 11.7 56 9.9 15.9 62 Little Goose 8870 8.6 -M * 9.0 -M * Sucker Creek 8880 9.6 12.5 77 -M 16.7 * Tie Creek 6870 .7 3.0 23 12.0 13.7 88 ----- ----- Basin Index (%) 70 74 BELLE FOURCHE Blind Park 6890 -M 2.7 * 8.7 13.8 63 Cole Canyon 5910 .0 .4 0* 13.5 11.2 121 ----- ----- Basin Index (%) 0* 89 CHEYENNE RIVER BASIN Blind Park 6890 -M 2.7 * 8.7 13.8 63 North Rapid Creek 6130 .0 2.7 0 -M 11.8 * ----- ----- Basin Index (%) 0 63 UPPER N. PLATTE Arapaho Ridge 10960 23.7 22.1 107 28.0 25.7 109 Blackhall Mtn 9820 32.2 -M * 35.8 -M * Columbine 9160 19.0 19.9 95 30.9 27.9 111 Divide Peak 8880 14.8 17.9 83 24.9 23.8 105 Joe Wright 10120 21.1 23.4 90 32.6 29.2 112 Laprele Creek 8375 7.5 7.1 106 15.6 14.6 107 Med Bow 10500 40.8 -M * 38.2 -M * Never Summer 10280 23.6 21.4 110 20.8 -M * North French Creek 10130 30.4 32.9 92 32.6 30.0 109 Old Battle 10000 37.9 34.4 110 38.6 38.4 101 Rawah 9020 7.1 7.8 91 18.9 16.8 112 Sage Creek Basin 7850 9.3 1.7 547 17.6 15.8 111 Sand Lake 10050 -M 31.2 * -M 28.4 * South Brush Creek 8440 2.3 10.0 23 13.4 17.4 77 Tower 10500 50.2 49.7 101 49.3 43.8 113 Webber Springs 9250 23.5 22.0 107 33.0 29.4 112 Whiskey Park 8950 26.9 25.7 105 34.7 30.8 113 Willow Creek Pass 9540 16.5 13.8 120 18.8 15.3 123 Zirkel 9340 27.1 21.9 124 40.4 30.5 132 ----- ----- Basin Index (%) 103 110 SWEETWATER Deer Park 9700 16.4 16.3 101 20.8 22.9 91 Larsen Creek 9000 5.0 9.6 52 15.9 -M * South Pass 9040 13.9 15.2 91 14.2 19.8 72 ----- ----- Basin Index (%) 86 82 LOWER N. PLATTE Casper Mtn. 7900 11.9 14.1 84 14.2 17.5 81 Laprele Creek 8375 7.5 7.1 106 15.6 14.6 107 Reno Hill 8400 15.0 13.6 110 19.4 18.3 106 Windy Peak 7900 5.4 5.5 98 12.9 12.6 102 ----- ----- Basin Index (%) 99 99 LARAMIE RIVER Brooklyn Lake 10240 24.0 23.0 104 28.3 24.1 117 Cinnabar Park 9574 19.1 20.1 95 25.8 26.4 98 Crow Creek 8330 .0 .0 * 12.1 13.0 93 Deadman Hill 10220 21.3 18.5 115 21.7 20.1 108 Rawah 9020 7.1 7.8 91 18.9 16.8 112 Roach 9700 15.1 17.0 89 23.5 21.7 108 Windy Peak 7900 5.4 5.5 98 12.9 12.6 102 ----- ----- Basin Index (%) 100 106 S. PLATTE Black Mountain 8920 9.6 -M * 15.8 -M * Crow Creek 8330 .0 .0 * 12.1 13.0 93 Deadman Hill 10220 21.3 18.5 115 21.7 20.1 108 ----- ----- Basin Index (%) 115* 102 LITTLE SNAKE RIVER Battle Mountain 7440 1.4 1.0 140* 17.4 16.8 104 Divide Peak 8880 14.8 17.9 83 24.9 23.8 105 Elk River 8700 12.0 14.3 84 21.0 22.2 95 Little Snake River 8915 24.3 23.1 105 40.0 32.0 125 Old Battle 10000 37.9 34.4 110 38.6 38.4 101 Sage Creek Basin 7850 9.3 1.7 547 17.6 15.8 111 Sandstone RS 8150 6.9 7.7 90 19.3 20.3 95 Whiskey Park 8950 26.9 25.7 105 34.7 30.8 113 ----- ----- Basin Index (%) 106 107 UPPER GREEN RIVER Big Sandy Opening 9080 14.1 11.8 119 16.5 14.8 111 Blind Bull Sum 8650 24.6 24.1 102 21.1 20.8 101 East Rim Divide 7930 4.0 8.8 45 13.5 12.5 108 Elkhart Park G.S. 9400 13.7 11.8 116 15.9 14.6 109 Gros Ventre Summit 8750 7.5 12.1 62 13.7 14.2 96 Gunsight Pass 9820 15.2 13.3 114 17.9 15.5 115 Indian Creek 9425 22.4 23.8 94 20.1 24.4 82 Kendall R.S. 7740 5.9 5.9 100 13.2 15.1 87 Loomis Park 8240 13.1 11.5 114 19.2 18.5 104 New Fork Lake 8340 6.8 7.1 96 11.0 11.7 94 Pocket Creek 9360 14.4 -M * 16.8 -M * Snider Basin 8060 5.0 10.0 50 14.5 15.2 95 Spring Creek Divide 9000 24.4 24.0 102 26.1 25.6 102 Triple Peak 8500 21.5 18.8 114 28.7 27.3 105 ----- ----- Basin Index (%) 97 101 LOWER GREEN RIVER Blacks Fork Jct 8869 6.0 -M * 15.2 -M * Buck Pasture 9632 15.3 -M * 22.8 -M * EF Blacks Fork GS 9360 9.2 -M * 13.9 -M * Hams Fork 7840 3.8 4.4 86 13.6 12.7 107 Hewinta 9500 8.5 6.1 139 17.3 15.7 110 Hickerson Park 9122 5.7 5.0 114 13.6 11.7 116 Hole-in-Rock 9168 3.6 4.2 86 12.9 11.2 115 Indian Creek 9425 22.4 23.8 94 20.1 24.4 82 Kelley R.S. 8180 12.3 11.8 104 17.9 19.7 91 Spirit Lk 10235 15.4 -M * 19.2 -M * Steel Creek Park 10158 17.1 16.7 102 21.7 18.6 117 ----- ----- Basin Index (%) 102 103 UPPER BEAR RIVER Bear River RS 8777 5.8 -M * 17.3 -M * Bug Lake 7987 20.7 16.1 129 26.9 21.1 127 Burts Miller Ranch 8000 -M -M * 10.1 -M * Chalk Creek #1 9171 25.7 24.7 104 32.8 27.8 118 Hayden Fork 9130 11.8 10.1 117 26.2 23.2 113 Kelley R.S. 8180 12.3 11.8 104 17.9 19.7 91 Lily Lake 9133 11.7 9.7 121 18.6 19.0 98 Monte Cristo 8932 35.4 27.3 130 35.7 28.5 125 Salt River Summit 7640 10.3 8.2 126 18.5 18.0 103 Spring Creek Divide 9000 24.4 24.0 102 26.1 25.6 102 ----- ----- Basin Index (%) 115 111 ----------------------------------------------------------------------------- -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.