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: MAY 3 , 2016 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 4.4 8.4 52 21.3 22.9 93 Black Bear 8170 29.5 37.3 79 37.2 42.0 89 Blind Bull Sum 8650 24.8 22.9 108 17.7 21.5 82 Cottonwood Creek 7670 16.7 14.7 114 29.1 27.7 105 East Rim Divide 7930 .0 7.9 0 12.5 13.0 96 Grand Targhee 9260 41.9 45.5 92 34.5 34.9 99 Granite Creek 6770 3.0 7.8 38 18.9 21.5 88 Grassy Lake 7265 18.8 28.3 66 36.9 39.5 93 Gros Ventre Summit 8750 8.9 11.3 79 12.0 14.8 81 Gunsight Pass 9820 14.6 12.1 121 16.3 16.2 101 Lewis Lake Divide 7850 19.3 29.7 65 33.3 38.8 86 Phillips Bench 8200 17.7 24.8 71 27.8 30.9 90 Salt River Summit 7760 4.7 7.6 62 17.4 18.5 94 Snake River Station 6920 1.4 6.2 23 23.4 24.9 94 Spring Creek Divide 9000 25.2 24.3 104 25.4 26.4 96 Thumb Divide 7980 2.1 11.3 19 16.0 21.1 76 Togwotee Pass 9580 22.3 24.7 90 27.0 27.5 98 Two Ocean Plateau 9240 25.9 29.9 87 26.0 30.3 86 Willow Creek 8380 21.3 22.3 96 36.5 37.8 97 Younts Peak 8350 2.6 15.7 17 14.7 17.8 83 ----- ----- Basin Index (%) 78 92 MADISON-GALLATIN Black Bear 8170 29.5 37.3 79 37.2 42.0 89 Canyon 7870 4.7 9.6 49 14.2 18.1 78 Madison Plateau 7750 15.6 21.0 74 24.4 29.1 84 West Yellowstone 6700 .0 .6 0* 14.6 16.0 91 Whiskey Creek 6800 7.5 13.8 54 18.0 22.5 80 ----- ----- Basin Index (%) 70 85 YELLOWSTONE Beartooth Lake 9360 18.3 22.7 81 19.5 22.1 88 Burnt Mtn 5880 .0 .0 * 13.8 16.1 86 Canyon 7870 4.7 9.6 49 14.2 18.1 78 Cole Creek 7850 12.0 16.7 72 15.3 16.6 92 Evening Star 9200 24.6 24.8 99 30.9 30.6 101 Fisher Creek 9100 27.3 32.6 84 27.4 35.4 77 Northeast Entrance 7350 .0 2.0 0 12.2 13.9 88 Parker Peak 9400 19.4 21.2 92 22.8 20.2 113 Sylvan Lake 8420 12.1 19.3 63 25.2 25.2 100 Thumb Divide 7980 2.1 11.3 19 16.0 21.1 76 Two Ocean Plateau 9240 25.9 29.9 87 26.0 30.3 86 White Mill 8700 20.6 23.9 86 22.7 26.5 86 Wolverine 7650 .0 1.4 0 12.8 13.9 92 ----- ----- Basin Index (%) 78 89 WIND RIVER Burroughs Creek 8750 6.6 -M * 14.9 -M * Castle Creek 8400 .0 -M * 8.9 -M * Cold Springs 9630 7.2 1.3 554 12.9 12.6 102 Deer Park 9700 19.3 15.7 123 22.9 23.6 97 Hobbs Park 10100 20.7 16.0 129 21.7 16.9 128 Kirwin 9550 12.9 10.6 122 16.5 14.0 118 Little Warm 9370 7.7 8.4 92 12.8 15.5 83 Owl Creek 8975 2.8 .7 400 8.9 8.1 110 South Pass 9040 16.8 14.4 117 17.7 20.5 86 St. Lawrence Alt 8620 5.7 2.1 271 13.6 11.7 116 Togwotee Pass 9580 22.3 24.7 90 27.0 27.5 98 Townsend Creek 8700 12.7 6.9 184 18.6 15.1 123 ----- ----- Basin Index (%) 127 104 BIGHORN BASIN Bald Mtn. 9380 17.0 20.5 83 15.0 19.9 75 Bear Trap Meadow 8200 3.3 .6 550 9.7 10.8 90 Bone Springs Div 9350 14.3 16.4 87 14.1 18.4 77 Grave Springs 8550 9.2 9.4 98 10.2 13.0 78 Kirwin 9550 12.9 10.6 122 16.5 14.0 118 Marquette 8760 8.5 -M * 14.1 -M * Middle Powder 7760 13.0 11.4 114 12.1 14.3 85 Owl Creek 8975 2.8 .7 400 8.9 8.1 110 Powder River Pass 9480 7.9 9.1 87 11.4 15.2 75 Shell Creek 9580 14.0 16.0 88 13.0 16.5 79 Timber Creek 7950 5.4 2.7 200 14.2 10.2 139 ----- ----- Basin Index (%) 102 89 SHOSHONE RIVER Blackwater 9780 24.3 25.7 95 27.0 23.7 114 Evening Star 9200 24.6 24.8 99 30.9 30.6 101 Marquette 8760 8.5 -M * 14.1 -M * Sylvan Road 7120 .0 4.6 0 16.2 18.7 87 Younts Peak 8350 2.6 15.7 17 14.7 17.8 83 ----- ----- Basin Index (%) 73 98 POWDER RIVER Bear Trap Meadow 8200 3.3 .6 550 9.7 10.8 90 Cloud Peak Reservoir 9860 13.9 16.4 85 17.6 16.9 104 Grave Springs 8550 9.2 9.4 98 10.2 13.0 78 Hansen Sawmill 8360 4.3 1.8 239 10.8 11.0 98 Middle Powder 7760 13.0 11.4 114 12.1 14.3 85 Powder River Pass 9480 7.9 9.1 87 11.4 15.2 75 Soldier Park 8720 1.4 -M * 10.9 -M * ----- ----- Basin Index (%) 106 88 TONGUE RIVER Big Goose 7990 9.9 9.3 106 13.8 14.3 97 Bone Springs Div 9350 14.3 16.4 87 14.1 18.4 77 Burgess Junction 7880 11.3 11.8 96 13.4 15.0 89 Dome Lake 8880 11.0 11.3 97 14.8 16.6 89 Little Goose 8870 11.8 -M * 16.3 -M * Sucker Creek 8880 11.2 12.0 93 15.5 17.6 88 Tie Creek 6870 .0 2.5 0 12.4 14.6 85 ----- ----- Basin Index (%) 91 87 BELLE FOURCHE Cole Canyon 5910 .0 .1 0* 11.4 12.3 93 ----- ----- Basin Index (%) 0* 93 CHEYENNE RIVER BASIN Blind Park 6890 .0 .2 0* 12.1 14.6 83 North Rapid Creek 6130 .0 .5 0* 9.6 12.6 76 ----- ----- Basin Index (%) 0* 80 UPPER N. PLATTE Arapaho Ridge 10960 27.5 22.3 123 29.2 26.4 111 Blackhall Mtn 9820 35.9 -M * 36.3 -M * Columbine 9160 20.9 17.5 119 29.4 28.8 102 Divide Peak 8880 21.0 17.8 118 30.3 24.6 123 Joe Wright 10120 -M 22.9 * -M 30.2 * Laprele Creek 8375 9.1 5.6 162 15.6 15.2 103 Med Bow 10500 38.5 -M * 38.0 -M * North French Creek 10130 32.7 32.8 100 33.2 31.0 107 Never Summer 10280 23.4 21.8 107 20.8 -M * Old Battle 10000 37.7 34.7 109 36.3 39.5 92 Rawah 9020 12.4 5.2 238 22.3 17.5 127 Sage Creek Basin 7850 11.9 1.0 1190* 16.1 16.3 99 Sand Lake 10050 34.1 31.5 108 33.4 29.3 114 South Brush Creek 8440 9.1 8.4 108 19.0 18.1 105 Tower 10500 46.0 50.4 91 44.7 45.1 99 Webber Springs 9250 24.1 21.3 113 31.3 30.2 104 Willow Creek Pass 9540 18.2 14.5 126 18.9 16.0 118 Zirkel 9340 26.2 20.8 126 35.3 31.2 113 ----- ----- Basin Index (%) 116 107 SWEETWATER Deer Park 9700 19.3 15.7 123 22.9 23.6 97 Larsen Creek 9000 5.5 8.6 64 16.1 -M * South Pass 9040 16.8 14.4 117 17.7 20.5 86 ----- ----- Basin Index (%) 107 92 LOWER N. PLATTE Casper Mtn. 7900 20.3 12.8 159 20.3 18.3 111 Laprele Creek 8375 9.1 5.6 162 15.6 15.2 103 Reno Hill 8400 19.0 12.2 156 24.3 19.2 127 Windy Peak 7900 9.9 3.4 291 15.7 13.2 119 ----- ----- Basin Index (%) 171 115 LARAMIE RIVER Brooklyn Lake 10240 26.4 23.1 114 28.8 25.0 115 Cinnabar Park 9574 22.8 19.0 120 28.4 27.3 104 Crow Creek 8330 7.6 .0 * 20.1 13.6 148 Deadman Hill 10220 24.0 19.2 125 24.5 20.9 117 Rawah 9020 12.4 5.2 238 22.3 17.5 127 Roach 9700 22.7 17.1 133 27.4 22.5 122 ----- ----- Basin Index (%) 139 119 S. PLATTE Black Mountain 8920 -M -M * 21.8 -M * Crow Creek 8330 7.6 .0 * 20.1 13.6 148 Deadman Hill 10220 24.0 19.2 125 24.5 20.9 117 ----- ----- Basin Index (%) 165* 129 LITTLE SNAKE RIVER Battle Mountain 7440 3.9 .0 * 19.5 17.3 113 Divide Peak 8880 21.0 17.8 118 30.3 24.6 123 Elk River 8700 13.7 12.5 110 22.2 23.0 97 Little Snake River 8915 25.1 21.8 115 38.2 33.1 115 Old Battle 10000 37.7 34.7 109 36.3 39.5 92 Sage Creek Basin 7850 11.9 1.0 1190* 16.1 16.3 99 Sandstone RS 8150 6.5 5.1 127 16.0 21.0 76 Whiskey Park 8950 29.7 26.8 111 34.3 31.8 108 ----- ----- Basin Index (%) 125 103 UPPER GREEN RIVER Big Sandy Opening 9080 11.3 9.8 115 14.6 15.3 95 Blind Bull Sum 8650 24.8 22.9 108 17.7 21.5 82 East Rim Divide 7930 .0 7.9 0 12.5 13.0 96 Elkhart Park G.S. 9400 9.1 10.8 84 13.6 15.2 89 Gros Ventre Summit 8750 8.9 11.3 79 12.0 14.8 81 Gunsight Pass 9820 14.6 12.1 121 16.3 16.2 101 Kendall R.S. 7740 -M 3.2 * 13.1 15.6 84 Loomis Park 8240 6.9 10.5 66 17.9 19.1 94 New Fork Lake 8340 .7 6.0 12 12.1 12.3 98 Pocket Creek 9360 9.4 -M * 11.9 -M * Snider Basin 8060 3.7 8.9 42 15.1 15.7 96 Spring Creek Divide 9000 25.2 24.3 104 25.4 26.4 96 Triple Peak 8500 18.1 16.7 108 29.0 28.1 103 ----- ----- Basin Index (%) 87 93 LOWER GREEN RIVER Blacks Fork Jct 8870 8.0 -M * 14.8 -M * Buck Pasture 9700 12.1 -M * 20.2 -M * EF Blacks Fork GS 9360 7.8 -M * 14.2 -M * Hams Fork 7840 2.2 2.0 110 12.1 13.2 92 Hewinta 9519 9.3 4.4 211 16.7 16.4 102 Hickerson Park 9145 10.2 3.5 291 16.0 12.2 131 Hole-in-Rock 9150 5.3 2.0 265 15.6 11.6 134 Indian Creek 9425 20.6 22.5 92 20.5 25.2 81 Kelley R.S. 8180 9.1 10.8 84 17.2 20.3 85 Spirit Lk 10235 19.4 -M * 23.0 -M * Steel Creek Park 10200 20.1 17.4 116 22.9 19.3 119 ----- ----- Basin Index (%) 123 102 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 14.3 -M * Bug Lake 7950 12.3 14.2 87 21.1 21.8 97 Burts Miller Ranch 8000 .0 -M * 7.2 -M * Chalk Creek #1 8993 17.4 23.8 73 25.2 28.7 88 Hayden Fork 9212 6.7 8.8 76 22.8 24.0 95 Kelley R.S. 8180 9.1 10.8 84 17.2 20.3 85 Lily Lake 9156 10.1 9.9 102 16.7 19.8 84 Monte Cristo 8960 25.0 25.8 97 31.3 29.5 106 Salt River Summit 7760 4.7 7.6 62 17.4 18.5 94 ----- ----- Basin Index (%) 85 93 ----------------------------------------------------------------------------- -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.