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: MARCH 15 , 2015 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 14.1 14.2 99 16.2 18.6 87 Black Bear 8170 23.5 32.0 73 23.8 33.7 71 Blind Bull Sum 8650 21.6 20.0 108 15.2 17.2 88 Cottonwood Creek 7670 19.2 18.9 102 22.6 21.2 107 East Rim Divide 7930 11.6 9.5 122 10.3 10.3 100 Grand Targhee 9260 32.2 32.5 99 26.7 26.5 101 Granite Creek 6770 14.9 14.9 100 15.8 17.7 89 Grassy Lake 7265 26.2 28.5 92 25.5 31.8 80 Gros Ventre Summit 8750 10.3 11.1 93 9.1 11.1 82 Gunsight Pass 9820 11.6 11.7 99 11.6 11.9 97 Lewis Lake Divide 7850 20.5 27.2 75 23.8 31.3 76 Phillips Bench 8200 20.4 21.8 94 22.0 24.6 89 Salt River Summit 7760 10.7 11.6 92 12.2 14.5 84 Snake River Station 6920 13.8 15.2 91 16.7 19.9 84 Spring Creek Divide 9000 22.9 20.1 114 22.0 20.8 106 Thumb Divide 7980 9.5 13.6 70 10.5 16.0 66 Togwotee Pass 9580 20.7 20.0 104 22.3 21.1 106 Two Ocean Plateau 9240 22.6 23.5 96 20.7 23.7 87 Willow Creek 8380 21.9 24.7 89 25.0 29.1 86 Younts Peak 8350 -M 12.8 * -M 13.7 * ----- ----- Basin Index (%) 94 88 MADISON-GALLATIN Black Bear 8170 23.5 32.0 73 23.8 33.7 71 Canyon 7870 9.5 11.6 82 10.8 14.2 76 Madison Plateau 7750 13.5 19.8 68 -M 23.1 * West Yellowstone 6700 7.3 9.9 74 8.7 12.5 70 Whiskey Creek 6800 9.1 13.6 67 10.9 17.8 61 ----- ----- Basin Index (%) 72 69 YELLOWSTONE Beartooth Lake 9360 18.2 18.6 98 17.6 17.1 103 Burnt Mtn 5880 2.8 4.4 64 10.9 10.5 104 Canyon 7870 9.5 11.6 82 10.8 14.2 76 Cole Creek 7850 11.6 11.5 101 11.2 10.2 110 Evening Star 9200 22.8 21.6 106 24.1 23.7 102 Fisher Creek 9100 26.9 27.7 97 25.0 27.7 90 Northeast Entrance 7350 9.1 8.7 105 12.1 10.7 113 Parker Peak 9400 19.2 17.1 112 18.5 15.3 121 Sylvan Lake 8420 14.0 17.5 80 16.8 19.4 87 Thumb Divide 7980 9.5 13.6 70 10.5 16.0 66 Two Ocean Plateau 9240 22.6 23.5 96 20.7 23.7 87 White Mill 8700 22.0 19.4 113 20.8 20.6 101 Wolverine 7650 11.7 8.8 133 12.2 10.6 115 ----- ----- Basin Index (%) 98 96 WIND RIVER Burroughs Creek 8750 12.6 -M * 14.7 -M * Castle Creek 8400 7.7 -M * 8.0 -M * Cold Springs 9630 6.7 6.1 110 7.1 8.2 87 Deer Park 9700 9.4 12.3 76 12.4 16.6 75 Hobbs Park 10100 8.3 11.2 74 8.8 10.6 83 Kirwin 9550 9.4 8.1 116 11.0 9.6 115 Little Warm 9370 8.8 9.0 98 10.2 10.8 94 Owl Creek 8975 4.6 4.5 102 6.2 4.7 132 South Pass 9040 9.4 12.9 73 10.2 14.8 69 St. Lawrence Alt 8620 4.3 5.9 73 5.7 7.2 79 Togwotee Pass 9580 20.7 20.0 104 22.3 21.1 106 Townsend Creek 8700 5.8 7.6 76 8.3 9.6 86 ----- ----- Basin Index (%) 90 90 BIGHORN BASIN Bald Mtn. 9380 14.2 16.2 88 11.2 14.3 78 Bear Trap Meadow 8200 7.7 4.8 160 7.2 6.8 106 Bone Springs Div 9350 12.5 13.6 92 10.7 12.8 84 Grave Springs 8550 7.9 7.7 103 6.7 8.6 78 Kirwin 9550 9.4 8.1 116 11.0 9.6 115 Marquette 8760 5.1 -M * 6.5 -M * Middle Powder 7760 10.2 9.1 112 -M 9.6 * Owl Creek 8975 4.6 4.5 102 6.2 4.7 132 Powder River Pass 9480 9.8 8.8 111 11.1 10.4 107 Shell Creek 9580 10.9 12.5 87 10.4 11.4 91 Timber Creek 7950 5.3 4.2 126 7.2 5.8 124 ----- ----- Basin Index (%) 103 97 SHOSHONE RIVER Blackwater 9780 17.4 19.7 88 18.2 17.6 103 Evening Star 9200 22.8 21.6 106 24.1 23.7 102 Marquette 8760 5.1 -M * 6.5 -M * Sylvan Road 7120 9.6 10.2 94 13.7 14.8 93 Younts Peak 8350 -M 12.8 * -M 13.7 * ----- ----- Basin Index (%) 97 100 POWDER RIVER Bear Trap Meadow 8200 7.7 4.8 160 7.2 6.8 106 Cloud Peak Reservoir 9860 12.3 12.2 101 11.1 10.6 105 Grave Springs 8550 7.9 7.7 103 6.7 8.6 78 Hansen Sawmill 8360 6.5 5.3 123 7.5 6.8 110 Middle Powder 7760 10.2 9.1 112 -M 9.6 * Powder River Pass 9480 9.8 8.8 111 11.1 10.4 107 Soldier Park 8720 5.5 -M * 7.0 -M * ----- ----- Basin Index (%) 114 101 TONGUE RIVER Big Goose 7990 7.5 7.4 101 8.3 8.7 95 Bone Springs Div 9350 12.5 13.6 92 10.7 12.8 84 Burgess Junction 7880 9.6 9.4 102 9.6 10.0 96 Dome Lake 8880 9.8 9.7 101 9.1 10.9 83 Little Goose 8870 7.9 -M * 9.9 -M * Sucker Creek 8880 10.4 10.4 100 10.8 11.7 92 Tie Creek 6870 4.8 4.7 102 9.1 9.3 98 ----- ----- Basin Index (%) 99 91 BELLE FOURCHE Cole Canyon 5910 3.4 5.4 63 6.6 7.7 86 ----- ----- Basin Index (%) 63 86 CHEYENNE RIVER BASIN Blind Park 6890 -M 7.1 * 7.6 10.2 75 North Rapid Creek 6130 5.8 6.4 91 8.2 8.3 99 ----- ----- Basin Index (%) 91 85 UPPER N. PLATTE Arapaho Ridge 10960 15.7 18.0 87 16.8 19.0 88 Blackhall Mtn 9820 20.9 -M * 23.4 -M * Columbine 9160 18.6 21.5 87 20.5 22.2 92 Divide Peak 8880 7.6 17.2 44 11.9 18.4 65 Joe Wright 10120 15.9 18.7 85 22.9 22.0 104 Laprele Creek 8375 6.8 8.8 77 7.5 10.4 72 Med Bow 10500 27.2 -M * 24.3 -M * North French Creek 10130 20.0 23.9 84 20.3 23.0 88 Never Summer 10280 14.9 17.3 86 14.2 -M * Old Battle 10000 20.3 26.0 78 21.0 30.5 69 Rawah 9020 9.6 9.2 104 13.2 11.6 114 Sage Creek Basin 7850 7.6 11.8 64 -M 12.8 * Sand Lake 10050 19.8 23.5 84 18.6 20.8 89 South Brush Creek 8440 8.1 11.2 72 9.2 12.9 71 Tower 10500 28.6 38.9 74 31.6 34.6 91 Webber Springs 9250 16.0 20.5 78 17.3 23.1 75 Willow Creek Pass 9540 8.6 10.5 82 10.8 11.3 96 Zirkel 9340 24.5 25.5 96 26.0 24.8 105 ----- ----- Basin Index (%) 80 87 SWEETWATER Deer Park 9700 9.4 12.3 76 12.4 16.6 75 Larsen Creek 9000 7.1 10.7 66 9.2 -M * South Pass 9040 9.4 12.9 73 10.2 14.8 69 ----- ----- Basin Index (%) 72 72 LOWER N. PLATTE Casper Mtn. 7900 8.6 11.8 73 8.6 12.3 70 Laprele Creek 8375 6.8 8.8 77 7.5 10.4 72 Reno Hill 8400 9.5 11.5 83 10.8 12.4 87 Windy Peak 7900 6.1 6.7 91 6.4 8.7 74 ----- ----- Basin Index (%) 80 76 LARAMIE RIVER Brooklyn Lake 10240 17.3 17.3 100 18.4 17.8 103 Cinnabar Park 9574 12.8 17.8 72 18.7 20.8 90 Crow Creek 8330 4.4 7.1 62 7.7 8.6 90 Deadman Hill 10220 14.2 13.4 106 14.3 14.3 100 Rawah 9020 9.6 9.2 104 13.2 11.6 114 Roach 9700 10.3 13.5 76 13.3 16.3 82 ----- ----- Basin Index (%) 88 96 S. PLATTE Black Mountain 8920 8.2 -M * 10.4 -M * Crow Creek 8330 4.4 7.1 62 7.7 8.6 90 Deadman Hill 10220 14.2 13.4 106 14.3 14.3 100 ----- ----- Basin Index (%) 91 96 LITTLE SNAKE RIVER Battle Mountain 7440 6.9 10.9 63 9.4 13.2 71 Divide Peak 8880 7.6 17.2 44 11.9 18.4 65 Elk River 8700 13.5 17.2 78 13.7 17.4 79 Little Snake River 8915 19.2 20.5 94 23.3 26.1 89 Old Battle 10000 20.3 26.0 78 21.0 30.5 69 Sage Creek Basin 7850 7.6 11.8 64 -M 12.8 * Sandstone RS 8150 6.7 11.6 58 -M 16.3 * Whiskey Park 8950 22.2 23.8 93 22.4 24.4 92 ----- ----- Basin Index (%) 75 78 UPPER GREEN RIVER Big Sandy Opening 9080 9.6 11.1 86 8.8 11.4 77 Blind Bull Sum 8650 21.6 20.0 108 15.2 17.2 88 East Rim Divide 7930 11.6 9.5 122 10.3 10.3 100 Elkhart Park G.S. 9400 9.6 10.3 93 10.3 11.4 90 Gros Ventre Summit 8750 10.3 11.1 93 9.1 11.1 82 Gunsight Pass 9820 11.6 11.7 99 11.6 11.9 97 Kendall R.S. 7740 11.1 10.9 102 10.9 12.6 87 Loomis Park 8240 13.7 13.0 105 14.6 15.1 97 New Fork Lake 8340 9.6 9.2 104 9.9 9.5 104 Pocket Creek 9360 7.0 -M * 5.6 -M * Snider Basin 8060 12.7 10.8 118 13.7 12.4 110 Spring Creek Divide 9000 22.9 20.1 114 22.0 20.8 106 Triple Peak 8500 21.9 19.0 115 23.4 22.0 106 ----- ----- Basin Index (%) 106 96 LOWER GREEN RIVER Blacks Fork Jct 8870 6.2 -M * 8.3 -M * Buck Pasture 9700 10.4 -M * 11.7 -M * EF Blacks Fork GS 9360 6.6 -M * 7.9 -M * Hams Fork 7840 9.1 10.1 90 8.3 9.8 85 Hewinta 9519 7.8 9.1 86 9.2 11.9 77 Hickerson Park 9145 5.2 6.6 79 6.1 8.5 72 Hole-in-Rock 9150 5.3 6.3 84 6.1 7.9 77 Indian Creek 9425 17.9 20.7 86 16.6 19.4 86 Kelley R.S. 8180 11.5 12.9 89 12.6 15.6 81 Spirit Lk 10235 6.6 -M * 9.3 -M * Steel Creek Park 10200 10.1 13.0 78 10.9 13.8 79 ----- ----- Basin Index (%) 85 80 UPPER BEAR RIVER Bear River RS 8777 5.2 -M * 7.0 -M * Bug Lake 7950 12.2 16.4 74 11.2 16.8 67 Burts Miller Ranch 8000 4.3 -M * 3.9 -M * Chalk Creek #1 8993 13.3 20.5 65 14.3 21.4 67 Hayden Fork 9212 6.3 14.0 45 13.0 17.9 73 Kelley R.S. 8180 11.5 12.9 89 12.6 15.6 81 Lily Lake 9156 8.0 11.3 71 8.5 14.5 59 Monte Cristo 8960 16.6 23.5 71 16.0 22.4 71 Salt River Summit 7760 10.7 11.6 92 12.2 14.5 84 ----- ----- Basin Index (%) 71 71 ----------------------------------------------------------------------------- -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.