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: FEBRUARY 28 , 2015 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 14.4 13.4 107 15.7 17.1 92 Black Bear 8170 23.4 29.2 80 23.1 30.6 75 Blind Bull Sum 8650 21.1 17.6 120 14.4 15.9 91 Cottonwood Creek 7670 19.0 16.6 114 22.0 19.4 113 East Rim Divide 7930 11.1 8.0 139 9.7 9.5 102 Grand Targhee 9260 31.3 29.7 105 25.7 24.7 104 Granite Creek 6770 -M 13.6 * -M 16.4 * Grassy Lake 7265 24.8 25.9 96 24.8 29.3 85 Gros Ventre Summit 8750 10.2 9.6 106 8.5 10.0 85 Gunsight Pass 9820 11.1 10.5 106 10.8 10.8 100 Lewis Lake Divide 7850 21.2 25.1 84 23.2 28.6 81 Phillips Bench 8200 20.0 19.5 103 21.3 22.6 94 Salt River Summit 7760 -M 10.5 * -M 13.4 * Snake River Station 6920 13.8 14.1 98 16.5 18.5 89 Spring Creek Divide 9000 22.2 18.3 121 21.0 19.2 109 Thumb Divide 7980 9.1 12.1 75 10.0 14.5 69 Togwotee Pass 9580 19.9 17.5 114 21.4 19.3 111 Two Ocean Plateau 9240 22.4 21.4 105 19.9 21.5 93 Willow Creek 8380 20.9 22.1 95 24.2 26.7 91 Younts Peak 8350 -M 11.6 * -M 12.6 * ----- ----- Basin Index (%) 102 92 MADISON-GALLATIN Black Bear 8170 23.4 29.2 80 23.1 30.6 75 Canyon 7870 9.6 10.4 92 10.6 13.0 82 Madison Plateau 7750 13.7 17.7 77 -M 21.1 * West Yellowstone 6700 7.1 8.9 80 8.6 11.6 74 Whiskey Creek 6800 9.2 12.0 77 10.9 16.2 67 ----- ----- Basin Index (%) 81 75 YELLOWSTONE Beartooth Lake 9360 17.9 16.4 109 17.0 15.6 109 Burnt Mtn 5880 3.0 4.0 75 10.4 9.2 113 Canyon 7870 9.6 10.4 92 10.6 13.0 82 Cole Creek 7850 11.3 9.6 118 10.5 9.0 117 Evening Star 9200 22.4 18.9 119 23.6 22.0 107 Fisher Creek 9100 26.7 25.5 105 24.6 25.4 97 Northeast Entrance 7350 9.4 8.0 118 11.9 9.8 121 Parker Peak 9400 18.7 15.9 118 17.9 14.0 128 Sylvan Lake 8420 14.0 15.7 89 16.4 17.9 92 Thumb Divide 7980 9.1 12.1 75 10.0 14.5 69 Two Ocean Plateau 9240 22.4 21.4 105 19.9 21.5 93 White Mill 8700 22.2 18.1 123 20.4 18.8 109 Wolverine 7650 10.8 8.5 127 11.2 9.9 113 ----- ----- Basin Index (%) 107 102 WIND RIVER Burroughs Creek 8750 11.9 -M * 13.2 -M * Castle Creek 8400 7.4 -M * 7.2 -M * Cold Springs 9630 6.3 5.4 117 6.6 7.4 89 Deer Park 9700 8.4 10.8 78 10.8 15.1 72 Hobbs Park 10100 7.7 9.5 81 7.8 9.4 83 Kirwin 9550 8.8 6.9 128 10.1 8.7 116 Little Warm 9370 8.3 7.8 106 9.3 9.8 95 Owl Creek 8975 4.1 3.9 105 5.5 4.3 128 South Pass 9040 8.6 11.3 76 8.8 13.3 66 St. Lawrence Alt 8620 3.4 5.0 68 4.9 6.4 77 Togwotee Pass 9580 19.9 17.5 114 21.4 19.3 111 Townsend Creek 8700 5.0 6.3 79 6.9 8.6 80 ----- ----- Basin Index (%) 95 90 BIGHORN BASIN Bald Mtn. 9380 13.8 14.5 95 10.3 13.0 79 Bear Trap Meadow 8200 7.4 4.3 172 6.7 6.1 110 Bone Springs Div 9350 12.1 11.7 103 9.9 11.7 85 Grave Springs 8550 7.4 6.7 110 6.4 7.8 82 Kirwin 9550 8.8 6.9 128 10.1 8.7 116 Marquette 8760 4.5 -M * 6.4 -M * Middle Powder 7760 9.9 7.9 125 -M 8.6 * Owl Creek 8975 4.1 3.9 105 5.5 4.3 128 Powder River Pass 9480 9.6 7.9 122 10.3 9.5 108 Shell Creek 9580 10.5 11.4 92 9.9 10.5 94 Timber Creek 7950 5.2 3.4 153 6.9 5.2 133 ----- ----- Basin Index (%) 113 99 SHOSHONE RIVER Blackwater 9780 16.8 17.0 99 17.4 16.0 109 Evening Star 9200 22.4 18.9 119 23.6 22.0 107 Marquette 8760 4.5 -M * 6.4 -M * Sylvan Road 7120 10.1 9.3 109 13.5 13.8 98 Younts Peak 8350 -M 11.6 * -M 12.6 * ----- ----- Basin Index (%) 109 105 POWDER RIVER Bear Trap Meadow 8200 7.4 4.3 172 6.7 6.1 110 Cloud Peak Reservoir 9860 11.8 10.3 115 10.2 9.5 107 Grave Springs 8550 7.4 6.7 110 6.4 7.8 82 Hansen Sawmill 8360 5.9 4.6 128 6.9 6.0 115 Middle Powder 7760 9.9 7.9 125 -M 8.6 * Powder River Pass 9480 9.6 7.9 122 10.3 9.5 108 Soldier Park 8720 4.9 -M * 6.6 -M * ----- ----- Basin Index (%) 125 104 TONGUE RIVER Big Goose 7990 6.9 6.1 113 7.5 7.7 97 Bone Springs Div 9350 12.1 11.7 103 9.9 11.7 85 Burgess Junction 7880 9.3 8.2 113 8.7 8.9 98 Dome Lake 8880 9.3 8.5 109 8.6 9.9 87 Little Goose 8870 -M -M * -M -M * Sucker Creek 8880 10.1 8.8 115 10.0 10.5 95 Tie Creek 6870 4.8 4.2 114 8.5 8.2 104 ----- ----- Basin Index (%) 111 93 BELLE FOURCHE Cole Canyon 5910 3.3 5.0 66 6.7 7.0 96 ----- ----- Basin Index (%) 66 96 CHEYENNE RIVER BASIN Blind Park 6890 5.0 6.4 78 7.5 9.3 81 North Rapid Creek 6130 5.7 5.8 98 7.8 7.6 103 ----- ----- Basin Index (%) 88 91 UPPER N. PLATTE Arapaho Ridge 10960 14.0 16.4 85 15.3 17.5 87 Blackhall Mtn 9820 17.9 -M * 20.5 -M * Columbine 9160 16.5 19.6 84 17.7 20.2 88 Divide Peak 8880 5.5 15.5 35 9.8 16.7 59 Joe Wright 10120 13.5 16.4 82 21.0 19.8 106 Laprele Creek 8375 5.6 7.7 73 6.4 9.2 70 Med Bow 10500 24.8 -M * 22.2 -M * North French Creek 10130 18.3 20.9 88 18.4 20.9 88 Never Summer 10280 12.9 16.0 81 13.1 -M * Old Battle 10000 17.4 23.8 73 17.5 27.7 63 Rawah 9020 9.3 8.6 108 12.1 10.8 112 Sage Creek Basin 7850 6.2 10.5 59 -M 11.6 * Sand Lake 10050 17.8 21.0 85 16.5 18.7 88 South Brush Creek 8440 6.6 10.1 65 7.6 11.7 65 Tower 10500 -M 35.8 * -M 31.6 * Webber Springs 9250 13.4 18.5 72 12.6 21.0 60 Willow Creek Pass 9540 7.6 9.4 81 9.6 10.2 94 Zirkel 9340 22.0 22.8 96 23.7 23.3 102 ----- ----- Basin Index (%) 79 83 SWEETWATER Deer Park 9700 8.4 10.8 78 10.8 15.1 72 Larsen Creek 9000 6.1 9.4 65 8.0 -M * South Pass 9040 8.6 11.3 76 8.8 13.3 66 ----- ----- Basin Index (%) 73 69 LOWER N. PLATTE Casper Mtn. 7900 7.4 10.0 74 7.2 11.0 65 Laprele Creek 8375 5.6 7.7 73 6.4 9.2 70 Reno Hill 8400 8.3 9.8 85 9.5 11.0 86 Windy Peak 7900 5.2 5.7 91 5.4 7.7 70 ----- ----- Basin Index (%) 80 73 LARAMIE RIVER Brooklyn Lake 10240 15.6 14.8 105 16.7 15.9 105 Cinnabar Park 9574 11.8 16.9 70 17.3 19.6 88 Crow Creek 8330 4.0 6.7 60 7.3 7.7 95 Deadman Hill 10220 12.7 12.4 102 12.8 12.6 102 Rawah 9020 9.3 8.6 108 12.1 10.8 112 Roach 9700 9.2 12.3 75 11.9 14.6 82 ----- ----- Basin Index (%) 87 96 S. PLATTE Black Mountain 8920 7.4 -M * 9.6 -M * Crow Creek 8330 4.0 6.7 60 7.3 7.7 95 Deadman Hill 10220 12.7 12.4 102 12.8 12.6 102 ----- ----- Basin Index (%) 87 99 LITTLE SNAKE RIVER Battle Mountain 7440 5.8 9.8 59 8.0 12.1 66 Divide Peak 8880 5.5 15.5 35 9.8 16.7 59 Elk River 8700 11.2 15.2 74 11.7 15.8 74 Little Snake River 8915 16.6 19.6 85 20.8 24.9 84 Old Battle 10000 17.4 23.8 73 17.5 27.7 63 Sage Creek Basin 7850 6.2 10.5 59 -M 11.6 * Sandstone RS 8150 5.3 10.3 51 -M 15.0 * Whiskey Park 8950 19.5 21.2 92 18.7 22.2 84 ----- ----- Basin Index (%) 69 72 UPPER GREEN RIVER Big Sandy Opening 9080 8.5 9.9 86 7.8 10.4 75 Blind Bull Sum 8650 21.1 17.6 120 14.4 15.9 91 East Rim Divide 7930 11.1 8.0 139 9.7 9.5 102 Elkhart Park G.S. 9400 9.0 9.3 97 9.5 10.4 91 Gros Ventre Summit 8750 10.2 9.6 106 8.5 10.0 85 Gunsight Pass 9820 11.1 10.5 106 10.8 10.8 100 Kendall R.S. 7740 10.8 9.7 111 10.4 11.6 90 Loomis Park 8240 13.1 11.6 113 13.9 14.0 99 New Fork Lake 8340 9.4 8.1 116 9.5 8.7 109 Pocket Creek 9360 6.2 -M * 4.9 -M * Snider Basin 8060 12.2 9.5 128 13.1 11.5 114 Spring Creek Divide 9000 22.2 18.3 121 21.0 19.2 109 Triple Peak 8500 21.1 16.6 127 22.3 20.1 111 ----- ----- Basin Index (%) 115 99 LOWER GREEN RIVER Blacks Fork Jct 8870 -M -M * -M -M * Buck Pasture 9700 -M -M * -M -M * EF Blacks Fork GS 9360 6.0 -M * 7.2 -M * Hams Fork 7840 8.5 9.1 93 7.6 9.1 84 Hewinta 9519 6.8 7.8 87 8.3 10.7 78 Hickerson Park 9145 5.0 5.8 86 5.2 7.5 69 Hole-in-Rock 9150 4.4 5.5 80 5.6 7.0 80 Indian Creek 9425 16.9 18.7 90 15.7 17.7 89 Kelley R.S. 8180 10.8 12.0 90 11.7 14.5 81 Spirit Lk 10235 5.8 -M * 8.3 -M * Steel Creek Park 10200 5.6 11.4 49 9.9 12.3 80 ----- ----- Basin Index (%) 83 81 UPPER BEAR RIVER Bear River RS 8777 5.0 -M * 6.2 -M * Bug Lake 7950 12.2 14.6 84 10.6 15.4 69 Burts Miller Ranch 8000 3.7 -M * 3.3 -M * Chalk Creek #1 8993 11.8 18.1 65 12.8 19.3 66 Hayden Fork 9212 7.2 11.9 61 11.9 16.3 73 Kelley R.S. 8180 10.8 12.0 90 11.7 14.5 81 Lily Lake 9156 6.9 10.1 68 7.7 13.1 59 Monte Cristo 8960 15.9 20.6 77 15.2 20.4 75 Salt River Summit 7760 -M 10.5 * -M 13.4 * ----- ----- Basin Index (%) 74 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.