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 SUNDAY: MAY 1 , 2016 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 5.8 9.3 62 21.2 22.8 93 Black Bear 8170 30.2 37.4 81 37.1 41.7 89 Blind Bull Sum 8650 25.0 23.1 108 17.6 21.3 83 Cottonwood Creek 7670 17.4 15.3 114 29.1 27.4 106 East Rim Divide 7930 .0 8.2 0 12.5 12.9 97 Grand Targhee 9260 42.1 44.8 94 34.5 34.6 100 Granite Creek 6770 4.4 8.3 53 18.8 21.3 88 Grassy Lake 7265 20.3 29.1 70 36.9 39.3 94 Gros Ventre Summit 8750 9.5 11.6 82 12.0 14.6 82 Gunsight Pass 9820 14.0 12.5 112 16.3 16.0 102 Lewis Lake Divide 7850 20.5 30.1 68 33.3 38.5 86 Phillips Bench 8200 18.7 25.4 74 27.8 30.7 91 Salt River Summit 7760 5.9 7.9 75 17.3 18.4 94 Snake River Station 6920 3.7 7.4 50 23.5 24.8 95 Spring Creek Divide 9000 25.3 24.3 104 25.4 26.2 97 Thumb Divide 7980 3.7 12.4 30 15.9 20.9 76 Togwotee Pass 9580 22.3 24.7 90 26.9 27.2 99 Two Ocean Plateau 9240 26.2 29.7 88 26.1 30.1 87 Willow Creek 8380 22.5 23.0 98 36.5 37.6 97 Younts Peak 8350 5.1 15.5 33 14.6 17.6 83 ----- ----- Basin Index (%) 81 92 MADISON-GALLATIN Black Bear 8170 30.2 37.4 81 37.1 41.7 89 Canyon 7870 5.9 10.4 57 14.2 18.0 79 Madison Plateau 7750 17.1 21.3 80 24.4 28.9 84 West Yellowstone 6700 .1 1.8 6 14.7 16.0 92 Whiskey Creek 6800 8.2 14.6 56 17.8 22.3 80 ----- ----- Basin Index (%) 72 85 YELLOWSTONE Beartooth Lake 9360 18.5 22.8 81 19.5 21.9 89 Burnt Mtn 5880 .1 .0 * 13.8 15.9 87 Canyon 7870 5.9 10.4 57 14.2 18.0 79 Cole Creek 7850 12.0 16.6 72 -M 16.4 * Evening Star 9200 24.8 24.9 100 30.7 30.4 101 Fisher Creek 9100 27.6 32.7 84 27.2 35.1 77 Northeast Entrance 7350 .0 3.0 0 12.3 13.8 89 Parker Peak 9400 19.8 21.3 93 22.8 20.0 114 Sylvan Lake 8420 13.1 19.8 66 25.3 25.1 101 Thumb Divide 7980 3.7 12.4 30 15.9 20.9 76 Two Ocean Plateau 9240 26.2 29.7 88 26.1 30.1 87 White Mill 8700 20.8 23.8 87 22.7 26.3 86 Wolverine 7650 .3 2.5 12 13.3 13.7 97 ----- ----- Basin Index (%) 79 90 WIND RIVER Burroughs Creek 8750 7.0 -M * 14.9 -M * Castle Creek 8400 .0 -M * 8.9 -M * Cold Springs 9630 7.5 1.3 577 12.7 12.4 102 Deer Park 9700 19.5 16.0 122 22.7 23.4 97 Hobbs Park 10100 20.8 16.0 130 21.5 16.6 130 Kirwin 9550 13.0 10.4 125 16.2 13.8 117 Little Warm 9370 7.9 8.7 91 12.7 15.4 82 Owl Creek 8975 3.2 1.0 320 8.8 7.9 111 South Pass 9040 16.9 14.9 113 17.6 20.3 87 St. Lawrence Alt 8620 6.0 2.5 240 13.6 11.5 118 Togwotee Pass 9580 22.3 24.7 90 26.9 27.2 99 Townsend Creek 8700 13.0 7.5 173 18.1 14.9 121 ----- ----- Basin Index (%) 126 105 BIGHORN BASIN Bald Mtn. 9380 17.1 20.5 83 14.9 19.7 76 Bear Trap Meadow 8200 3.8 .9 422 9.6 10.6 91 Bone Springs Div 9350 14.7 16.5 89 14.0 18.2 77 Grave Springs 8550 9.4 9.4 100 10.1 12.8 79 Kirwin 9550 13.0 10.4 125 16.2 13.8 117 Marquette 8760 8.5 -M * 14.2 -M * Middle Powder 7760 13.2 11.6 114 11.9 14.1 84 Owl Creek 8975 3.2 1.0 320 8.8 7.9 111 Powder River Pass 9480 8.2 9.4 87 11.3 15.1 75 Shell Creek 9580 14.3 15.9 90 12.9 16.3 79 Timber Creek 7950 5.9 3.1 190 14.2 10.0 142 ----- ----- Basin Index (%) 104 89 SHOSHONE RIVER Blackwater 9780 24.2 25.3 96 27.0 23.4 115 Evening Star 9200 24.8 24.9 100 30.7 30.4 101 Marquette 8760 8.5 -M * 14.2 -M * Sylvan Road 7120 .0 5.8 0 16.4 18.6 88 Younts Peak 8350 5.1 15.5 33 14.6 17.6 83 ----- ----- Basin Index (%) 76 99 POWDER RIVER Bear Trap Meadow 8200 3.8 .9 422 9.6 10.6 91 Cloud Peak Reservoir 9860 14.1 16.5 85 17.4 16.6 105 Grave Springs 8550 9.4 9.4 100 10.1 12.8 79 Hansen Sawmill 8360 4.7 2.5 188 10.8 10.8 100 Middle Powder 7760 13.2 11.6 114 11.9 14.1 84 Powder River Pass 9480 8.2 9.4 87 11.3 15.1 75 Soldier Park 8720 1.8 -M * 10.9 -M * ----- ----- Basin Index (%) 106 89 TONGUE RIVER Big Goose 7990 10.2 9.2 111 13.6 14.0 97 Bone Springs Div 9350 14.7 16.5 89 14.0 18.2 77 Burgess Junction 7880 11.6 12.1 96 13.3 14.8 90 Dome Lake 8880 11.2 11.4 98 14.7 16.4 90 Little Goose 8870 12.0 -M * 16.3 -M * Sucker Creek 8880 11.5 12.2 94 15.5 17.3 90 Tie Creek 6870 .6 2.7 22 12.4 14.3 87 ----- ----- Basin Index (%) 93 88 BELLE FOURCHE Cole Canyon 5910 .8 .3 267* 11.3 11.8 96 ----- ----- Basin Index (%) 267* 96 CHEYENNE RIVER BASIN Blind Park 6890 .3 .8 38 12.1 14.3 85 North Rapid Creek 6130 .0 .8 0 9.6 12.2 79 ----- ----- Basin Index (%) 19 82 UPPER N. PLATTE Arapaho Ridge 10960 27.7 22.3 124 29.2 26.2 111 Blackhall Mtn 9820 36.0 -M * 35.9 -M * Columbine 9160 20.7 18.2 114 29.2 28.5 102 Divide Peak 8880 21.0 18.0 117 30.3 24.3 125 Joe Wright 10120 -M 23.3 * -M 29.8 * Laprele Creek 8375 9.4 6.1 154 15.6 15.0 104 Med Bow 10500 38.9 -M * 37.7 -M * North French Creek 10130 32.6 32.9 99 33.1 30.7 108 Never Summer 10280 23.2 21.8 106 20.7 -M * Old Battle 10000 37.7 34.7 109 35.3 39.2 90 Rawah 9020 12.7 6.1 208 22.2 17.2 129 Sage Creek Basin 7850 11.9 1.1 1082* 16.1 16.1 100 Sand Lake 10050 34.1 31.4 109 33.1 29.0 114 South Brush Creek 8440 9.6 9.2 104 18.9 17.8 106 Tower 10500 45.9 50.0 92 44.2 44.7 99 Webber Springs 9250 24.3 21.7 112 31.3 29.9 105 Willow Creek Pass 9540 18.3 14.2 129 18.9 15.8 120 Zirkel 9340 26.3 21.0 125 35.3 31.0 114 ----- ----- Basin Index (%) 115 107 SWEETWATER Deer Park 9700 19.5 16.0 122 22.7 23.4 97 Larsen Creek 9000 6.4 9.2 70 16.0 -M * South Pass 9040 16.9 14.9 113 17.6 20.3 87 ----- ----- Basin Index (%) 107 92 LOWER N. PLATTE Casper Mtn. 7900 20.6 13.3 155 20.1 17.9 112 Laprele Creek 8375 9.4 6.1 154 15.6 15.0 104 Reno Hill 8400 19.2 12.6 152 24.1 18.9 128 Windy Peak 7900 10.2 4.0 255 15.6 13.0 120 ----- ----- Basin Index (%) 165 116 LARAMIE RIVER Brooklyn Lake 10240 26.5 23.3 114 28.5 24.7 115 Cinnabar Park 9574 23.0 19.4 119 28.3 26.9 105 Crow Creek 8330 8.4 .0 * -M 13.4 * Deadman Hill 10220 24.0 19.0 126 24.3 20.6 118 Rawah 9020 12.7 6.1 208 22.2 17.2 129 Roach 9700 22.7 17.2 132 27.2 22.2 123 ----- ----- Basin Index (%) 138 117 S. PLATTE Black Mountain 8920 -M -M * 21.7 -M * Crow Creek 8330 8.4 .0 * -M 13.4 * Deadman Hill 10220 24.0 19.0 126 24.3 20.6 118 ----- ----- Basin Index (%) 171* 118* LITTLE SNAKE RIVER Battle Mountain 7440 5.1 .0 * 19.4 17.1 113 Divide Peak 8880 21.0 18.0 117 30.3 24.3 125 Elk River 8700 13.6 13.2 103 22.2 22.7 98 Little Snake River 8915 25.4 22.3 114 38.2 32.7 117 Old Battle 10000 37.7 34.7 109 35.3 39.2 90 Sage Creek Basin 7850 11.9 1.1 1082* 16.1 16.1 100 Sandstone RS 8150 7.6 5.9 129 15.8 20.8 76 Whiskey Park 8950 29.6 26.5 112 34.3 31.5 109 ----- ----- Basin Index (%) 125 104 UPPER GREEN RIVER Big Sandy Opening 9080 11.8 10.6 111 14.7 15.1 97 Blind Bull Sum 8650 25.0 23.1 108 17.6 21.3 83 East Rim Divide 7930 .0 8.2 0 12.5 12.9 97 Elkhart Park G.S. 9400 9.2 11.3 81 13.5 15.0 90 Gros Ventre Summit 8750 9.5 11.6 82 12.0 14.6 82 Gunsight Pass 9820 14.0 12.5 112 16.3 16.0 102 Kendall R.S. 7740 -M 4.3 * 13.1 15.5 85 Loomis Park 8240 7.9 11.0 72 17.9 18.9 95 New Fork Lake 8340 2.4 6.5 37 12.0 12.1 99 Pocket Creek 9360 9.5 -M * 11.9 -M * Snider Basin 8060 5.3 9.4 56 15.1 15.6 97 Spring Creek Divide 9000 25.3 24.3 104 25.4 26.2 97 Triple Peak 8500 19.2 17.5 110 28.9 27.9 104 ----- ----- Basin Index (%) 89 94 LOWER GREEN RIVER Blacks Fork Jct 8870 7.9 -M * 14.8 -M * Buck Pasture 9700 12.1 -M * 20.2 -M * EF Blacks Fork GS 9360 8.2 -M * 14.3 -M * Hams Fork 7840 3.6 2.9 124 12.1 13.1 92 Hewinta 9519 9.2 4.8 192 17.3 16.1 107 Hickerson Park 9145 10.6 4.2 252 16.1 12.0 134 Hole-in-Rock 9150 5.5 2.5 220 15.6 11.4 137 Indian Creek 9425 20.8 23.0 90 20.2 25.0 81 Kelley R.S. 8180 9.7 11.5 84 17.2 20.2 85 Spirit Lk 10235 19.6 -M * 22.6 -M * Steel Creek Park 10200 20.1 17.1 118 22.8 19.1 119 ----- ----- Basin Index (%) 120 104 UPPER BEAR RIVER Bear River RS 8777 1.1 -M * 14.4 -M * Bug Lake 7950 12.7 15.1 84 21.1 21.7 97 Burts Miller Ranch 8000 .1 -M * 7.2 -M * Chalk Creek #1 8993 17.8 24.2 74 25.3 28.4 89 Hayden Fork 9212 7.7 9.3 83 22.8 23.8 96 Kelley R.S. 8180 9.7 11.5 84 17.2 20.2 85 Lily Lake 9156 10.5 9.9 106 16.7 19.5 86 Monte Cristo 8960 25.0 26.5 94 31.2 29.2 107 Salt River Summit 7760 5.9 7.9 75 17.3 18.4 94 ----- ----- Basin Index (%) 86 94 ----------------------------------------------------------------------------- -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.