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: APRIL 19 , 2015 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 10.8 12.0 90 17.8 21.6 82 Black Bear 8170 25.1 36.8 68 26.7 39.6 67 Blind Bull Sum 8650 23.5 24.0 98 16.4 20.1 82 Cottonwood Creek 7670 17.9 18.8 95 25.3 25.7 98 East Rim Divide 7930 3.8 9.6 40 10.9 12.2 89 Grand Targhee 9260 36.2 41.9 86 29.7 32.4 92 Granite Creek 6770 10.5 11.1 95 16.6 20.2 82 Grassy Lake 7265 23.6 31.5 75 28.7 37.2 77 Gros Ventre Summit 8750 9.7 13.2 73 9.5 13.6 70 Gunsight Pass 9820 11.7 13.6 86 12.6 14.8 85 Lewis Lake Divide 7850 19.2 30.3 63 26.9 36.6 73 Phillips Bench 8200 20.6 25.7 80 24.1 29.0 83 Salt River Summit 7760 6.0 10.0 60 13.4 17.3 77 Snake River Station 6920 8.7 11.5 76 18.8 23.4 80 Spring Creek Divide 9000 24.4 23.5 104 23.7 24.6 96 Thumb Divide 7980 2.8 14.5 19 12.0 19.6 61 Togwotee Pass 9580 21.9 23.7 92 25.0 25.5 98 Two Ocean Plateau 9240 25.7 27.9 92 23.8 28.4 84 Willow Creek 8380 17.7 26.8 66 28.4 35.1 81 Younts Peak 8350 -M 15.1 * -M 16.6 * ----- ----- Basin Index (%) 79 82 MADISON-GALLATIN Black Bear 8170 25.1 36.8 68 26.7 39.6 67 Canyon 7870 9.2 12.3 75 11.3 16.9 67 Madison Plateau 7750 13.5 22.9 59 -M 27.4 * West Yellowstone 6700 -M 7.8 * -M 15.0 * Whiskey Creek 6800 6.8 15.2 45 11.8 21.1 56 ----- ----- Basin Index (%) 63 64 YELLOWSTONE Beartooth Lake 9360 20.7 23.2 89 20.5 20.6 100 Burnt Mtn 5880 .2 .0 * 13.4 14.1 95 Canyon 7870 9.2 12.3 75 11.3 16.9 67 Cole Creek 7850 14.2 16.1 88 12.7 14.4 88 Evening Star 9200 23.2 24.9 93 27.1 28.6 95 Fisher Creek 9100 31.4 32.3 97 29.0 33.2 87 Northeast Entrance 7350 -M 7.0 * 13.4 12.9 104 Parker Peak 9400 21.0 20.8 101 20.9 18.6 112 Sylvan Lake 8420 11.1 20.4 54 19.6 23.4 84 Thumb Divide 7980 2.8 14.5 19 12.0 19.6 61 Two Ocean Plateau 9240 25.7 27.9 92 23.8 28.4 84 White Mill 8700 23.4 23.6 99 23.6 24.8 95 Wolverine 7650 .9 7.5 12 13.1 12.8 102 ----- ----- Basin Index (%) 82 90 WIND RIVER Burroughs Creek 8750 10.6 -M * 16.2 -M * Castle Creek 8400 3.5 -M * 9.1 -M * Cold Springs 9630 1.7 4.9 35 9.1 10.8 84 Deer Park 9700 11.0 16.2 68 15.1 21.3 71 Hobbs Park 10100 11.4 14.8 77 12.1 14.6 83 Kirwin 9550 11.9 10.0 119 13.4 12.3 109 Little Warm 9370 8.9 10.2 87 11.0 13.8 80 Owl Creek 8975 .0 4.2 0 6.7 6.7 100 South Pass 9040 10.8 15.6 69 12.4 18.5 67 St. Lawrence Alt 8620 1.5 5.4 28 8.9 9.8 91 Togwotee Pass 9580 21.9 23.7 92 25.0 25.5 98 Townsend Creek 8700 7.1 9.6 74 10.6 13.1 81 ----- ----- Basin Index (%) 75 85 BIGHORN BASIN Bald Mtn. 9380 16.7 19.7 85 13.4 18.1 74 Bear Trap Meadow 8200 1.0 3.5 29 7.6 9.3 82 Bone Springs Div 9350 15.6 16.2 96 13.2 16.6 80 Grave Springs 8550 6.8 9.6 71 7.2 11.5 63 Kirwin 9550 11.9 10.0 119 13.4 12.3 109 Marquette 8760 7.4 -M * 11.1 -M * Middle Powder 7760 9.4 12.5 75 -M 12.7 * Owl Creek 8975 .0 4.2 0 6.7 6.7 100 Powder River Pass 9480 9.6 10.2 94 12.7 13.6 93 Shell Creek 9580 12.8 15.3 84 11.8 14.8 80 Timber Creek 7950 3.5 4.9 71 10.6 8.4 126 ----- ----- Basin Index (%) 82 87 SHOSHONE RIVER Blackwater 9780 19.7 23.8 83 20.6 21.7 95 Evening Star 9200 23.2 24.9 93 27.1 28.6 95 Marquette 8760 7.4 -M * 11.1 -M * Sylvan Road 7120 .1 10.0 1 15.9 17.5 91 Younts Peak 8350 -M 15.1 * -M 16.6 * ----- ----- Basin Index (%) 73 94 POWDER RIVER Bear Trap Meadow 8200 1.0 3.5 29 7.6 9.3 82 Cloud Peak Reservoir 9860 13.6 15.7 87 13.5 14.7 92 Grave Springs 8550 6.8 9.6 71 7.2 11.5 63 Hansen Sawmill 8360 2.1 5.0 42 8.4 9.5 88 Middle Powder 7760 9.4 12.5 75 -M 12.7 * Powder River Pass 9480 9.6 10.2 94 12.7 13.6 93 Soldier Park 8720 .5 -M * 8.8 -M * ----- ----- Basin Index (%) 75 84 TONGUE RIVER Big Goose 7990 8.0 9.4 85 10.9 12.5 87 Bone Springs Div 9350 15.6 16.2 96 13.2 16.6 80 Burgess Junction 7880 11.6 12.4 94 11.3 13.4 84 Dome Lake 8880 10.6 11.8 90 11.5 14.8 78 Little Goose 8870 -M -M * 13.2 -M * Sucker Creek 8880 11.6 12.7 91 13.5 15.6 87 Tie Creek 6870 .8 4.5 18 11.7 12.7 92 ----- ----- Basin Index (%) 87 84 BELLE FOURCHE Cole Canyon 5910 .0 2.2 0 7.9 10.3 77 ----- ----- Basin Index (%) 0 77 CHEYENNE RIVER BASIN Blind Park 6890 .6 4.2 14 9.0 12.8 70 North Rapid Creek 6130 .1 4.4 2 9.4 10.6 89 ----- ----- Basin Index (%) 8 79 UPPER N. PLATTE Arapaho Ridge 10960 16.7 21.4 78 19.5 24.3 80 Blackhall Mtn 9820 24.3 -M * 27.7 -M * Columbine 9160 10.0 20.7 48 23.2 26.8 87 Divide Peak 8880 -M 19.1 * 15.9 22.7 70 Joe Wright 10120 18.4 22.2 83 27.4 27.6 99 Laprele Creek 8375 4.7 8.3 57 10.9 13.5 81 Med Bow 10500 31.7 -M * 29.4 -M * North French Creek 10130 23.0 32.0 72 24.8 28.3 88 Never Summer 10280 16.9 20.6 82 17.3 -M * Old Battle 10000 25.4 32.5 78 24.3 36.8 66 Rawah 9020 5.1 8.6 59 16.5 15.5 106 Sage Creek Basin 7850 1.1 6.6 17 8.6 15.2 57 Sand Lake 10050 25.2 30.4 83 25.2 26.6 95 South Brush Creek 8440 1.6 9.9 16 11.7 16.3 72 Tower 10500 31.2 47.8 65 36.2 41.8 87 Webber Springs 9250 16.5 22.3 74 21.8 28.2 77 Willow Creek Pass 9540 11.2 12.9 87 13.2 14.3 92 Zirkel 9340 16.9 22.8 74 29.6 29.7 100 ----- ----- Basin Index (%) 70 84 SWEETWATER Deer Park 9700 11.0 16.2 68 15.1 21.3 71 Larsen Creek 9000 .2 10.4 2 10.4 -M * South Pass 9040 10.8 15.6 69 12.4 18.5 67 ----- ----- Basin Index (%) 52 69 LOWER N. PLATTE Casper Mtn. 7900 7.7 14.5 53 11.4 16.4 70 Laprele Creek 8375 4.7 8.3 57 10.9 13.5 81 Reno Hill 8400 11.9 14.0 85 15.2 16.9 90 Windy Peak 7900 4.9 6.7 73 10.2 11.5 89 ----- ----- Basin Index (%) 67 82 LARAMIE RIVER Brooklyn Lake 10240 20.8 22.1 94 24.0 22.6 106 Cinnabar Park 9574 15.2 20.3 75 23.2 25.3 92 Crow Creek 8330 2.8 1.1 255 12.8 12.0 107 Deadman Hill 10220 19.1 16.8 114 19.9 18.8 106 Rawah 9020 5.1 8.6 59 16.5 15.5 106 Roach 9700 12.2 16.5 74 17.9 20.4 88 ----- ----- Basin Index (%) 88 100 S. PLATTE Black Mountain 8920 12.0 -M * 16.0 -M * Crow Creek 8330 2.8 1.1 255 12.8 12.0 107 Deadman Hill 10220 19.1 16.8 114 19.9 18.8 106 ----- ----- Basin Index (%) 122 106 LITTLE SNAKE RIVER Battle Mountain 7440 .8 4.9 16 11.3 16.0 71 Divide Peak 8880 -M 19.1 * 15.9 22.7 70 Elk River 8700 5.4 15.8 34 15.9 21.2 75 Little Snake River 8915 15.4 24.7 62 26.8 31.2 86 Old Battle 10000 25.4 32.5 78 24.3 36.8 66 Sage Creek Basin 7850 1.1 6.6 17 8.6 15.2 57 Sandstone RS 8150 .6 10.4 6 -M 19.4 * Whiskey Park 8950 20.6 26.0 79 26.7 29.5 91 ----- ----- Basin Index (%) 57 75 UPPER GREEN RIVER Big Sandy Opening 9080 9.9 12.7 78 9.9 14.0 71 Blind Bull Sum 8650 23.5 24.0 98 16.4 20.1 82 East Rim Divide 7930 3.8 9.6 40 10.9 12.2 89 Elkhart Park G.S. 9400 9.2 11.9 77 10.7 14.0 76 Gros Ventre Summit 8750 9.7 13.2 73 9.5 13.6 70 Gunsight Pass 9820 11.7 13.6 86 12.6 14.8 85 Kendall R.S. 7740 5.8 8.8 66 11.2 14.7 76 Loomis Park 8240 10.7 13.1 82 15.7 17.9 88 New Fork Lake 8340 5.8 9.0 64 9.8 11.2 88 Pocket Creek 9360 8.2 -M * 7.0 -M * Snider Basin 8060 6.8 10.9 62 14.5 14.7 99 Spring Creek Divide 9000 24.4 23.5 104 23.7 24.6 96 Triple Peak 8500 19.5 19.3 101 25.4 26.2 97 ----- ----- Basin Index (%) 83 86 LOWER GREEN RIVER Blacks Fork Jct 8870 .9 -M * 10.0 -M * Buck Pasture 9700 7.5 -M * 13.7 -M * EF Blacks Fork GS 9360 2.6 -M * 10.1 -M * Hams Fork 7840 .7 7.1 10 9.1 11.9 76 Hewinta 9519 3.0 8.3 36 11.4 14.9 77 Hickerson Park 9145 2.9 5.6 52 9.6 11.0 87 Hole-in-Rock 9150 3.0 6.0 50 9.5 10.5 90 Indian Creek 9425 16.7 23.2 72 18.2 23.5 77 Kelley R.S. 8180 10.6 12.9 82 14.2 18.8 76 Spirit Lk 10235 5.6 -M * 13.4 -M * Steel Creek Park 10200 12.0 16.2 74 13.5 17.6 77 ----- ----- Basin Index (%) 62 79 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 8.1 -M * Bug Lake 7950 8.1 17.6 46 12.6 20.2 62 Burts Miller Ranch 8000 .1 -M * 4.0 -M * Chalk Creek #1 8993 9.7 24.7 39 16.3 26.6 61 Hayden Fork 9212 .2 12.2 2 14.7 22.3 66 Kelley R.S. 8180 10.6 12.9 82 14.2 18.8 76 Lily Lake 9156 3.5 11.0 32 9.9 18.2 54 Monte Cristo 8960 14.9 27.6 54 18.9 27.2 69 Salt River Summit 7760 6.0 10.0 60 13.4 17.3 77 ----- ----- Basin Index (%) 46 66 ----------------------------------------------------------------------------- -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.