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 WEDNESDAY: FEBRUARY 18 , 2015 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 14.0 12.9 109 15.2 16.0 95 Black Bear 8170 23.3 27.5 85 23.3 28.4 82 Blind Bull Sum 8650 20.8 16.5 126 14.3 14.8 97 Cottonwood Creek 7670 18.5 15.2 122 21.8 18.0 121 East Rim Divide 7930 11.1 7.4 150 9.7 8.7 111 Grand Targhee 9260 30.5 27.2 112 25.0 23.6 106 Granite Creek 6770 -M 12.8 * -M 15.3 * Grassy Lake 7265 24.6 24.5 100 24.5 27.5 89 Gros Ventre Summit 8750 10.1 9.1 111 8.3 9.3 89 Gunsight Pass 9820 10.7 9.8 109 10.4 10.1 103 Lewis Lake Divide 7850 21.2 23.7 89 22.9 26.7 86 Phillips Bench 8200 19.6 18.2 108 20.8 21.0 99 Salt River Summit 7760 9.6 9.6 100 11.4 12.3 93 Snake River Station 6920 14.0 13.4 104 16.4 17.5 94 Spring Creek Divide 9000 21.3 16.6 128 20.7 17.8 116 Thumb Divide 7980 9.1 11.0 83 9.9 13.6 73 Togwotee Pass 9580 18.8 16.7 113 20.4 18.0 113 Two Ocean Plateau 9240 21.5 19.8 109 19.3 20.0 96 Willow Creek 8380 20.8 20.0 104 23.9 24.6 97 Younts Peak 8350 -M 11.1 * -M 11.8 * ----- ----- Basin Index (%) 107 97 MADISON-GALLATIN Black Bear 8170 23.3 27.5 85 23.3 28.4 82 Canyon 7870 9.6 9.6 100 10.5 12.2 86 Madison Plateau 7750 14.0 16.1 87 14.0 19.4 72 West Yellowstone 6700 7.0 7.9 89 8.5 10.9 78 Whiskey Creek 6800 9.2 11.1 83 10.9 15.0 73 ----- ----- Basin Index (%) 87 78 YELLOWSTONE Beartooth Lake 9360 17.6 15.5 114 16.6 14.6 114 Burnt Mtn 5880 1.8 3.7 49 8.8 8.9 99 Canyon 7870 9.6 9.6 100 10.5 12.2 86 Cole Creek 7850 8.9 8.9 100 9.2 8.5 108 Evening Star 9200 22.0 18.0 122 23.1 20.5 113 Fisher Creek 9100 26.0 23.9 109 23.9 23.6 101 Northeast Entrance 7350 9.1 7.5 121 11.8 9.3 127 Parker Peak 9400 18.4 14.4 128 17.6 13.0 135 Sylvan Lake 8420 13.7 14.6 94 16.1 16.7 96 Thumb Divide 7980 9.1 11.0 83 9.9 13.6 73 Two Ocean Plateau 9240 21.5 19.8 109 19.3 20.0 96 White Mill 8700 21.1 16.6 127 20.0 17.6 114 Wolverine 7650 10.6 8.1 131 11.6 9.3 125 ----- ----- Basin Index (%) 110 106 WIND RIVER Burroughs Creek 8750 11.5 9.8 117 13.3 11.8 113 Castle Creek 8400 7.1 -M * 7.2 -M * Cold Springs 9630 6.0 5.3 113 6.5 6.9 94 Deer Park 9700 7.6 10.0 76 10.2 14.1 72 Hobbs Park 10100 7.0 8.8 80 7.3 8.8 83 Kirwin 9550 8.5 6.2 137 10.0 8.2 122 Little Warm 9370 7.9 7.5 105 9.1 9.1 100 Owl Creek 8975 3.7 3.4 109 5.3 4.0 132 South Pass 9040 8.1 10.4 78 8.2 12.5 66 St. Lawrence Alt 8620 2.8 4.7 60 4.4 6.0 73 Togwotee Pass 9580 18.8 16.7 113 20.4 18.0 113 Townsend Creek 8700 4.2 5.9 71 6.2 8.1 77 ----- ----- Basin Index (%) 97 94 BIGHORN BASIN Bald Mtn. 9380 12.6 13.3 95 9.6 12.0 80 Bear Trap Meadow 8200 6.4 3.9 164 5.8 5.7 102 Bone Springs Div 9350 10.8 11.0 98 9.1 10.8 84 Grave Springs 8550 6.5 5.7 114 5.6 7.3 77 Kirwin 9550 8.5 6.2 137 10.0 8.2 122 Marquette 8760 3.9 -M * 6.0 -M * Middle Powder 7760 8.1 7.2 112 6.9 8.2 84 Owl Creek 8975 3.7 3.4 109 5.3 4.0 132 Powder River Pass 9480 8.6 7.3 118 9.3 8.8 106 Shell Creek 9580 9.6 10.3 93 9.1 9.8 93 Timber Creek 7950 4.3 3.1 139 5.9 4.9 120 ----- ----- Basin Index (%) 111 96 SHOSHONE RIVER Blackwater 9780 16.6 15.9 104 17.2 15.0 115 Evening Star 9200 22.0 18.0 122 23.1 20.5 113 Marquette 8760 3.9 -M * 6.0 -M * Sylvan Road 7120 10.4 8.7 120 13.2 13.1 101 Younts Peak 8350 -M 11.1 * -M 11.8 * ----- ----- Basin Index (%) 115 110 POWDER RIVER Bear Trap Meadow 8200 6.4 3.9 164 5.8 5.7 102 Cloud Peak Reservoir 9860 10.5 9.7 108 9.4 8.8 107 Grave Springs 8550 6.5 5.7 114 5.6 7.3 77 Hansen Sawmill 8360 5.6 4.4 127 6.4 5.6 114 Middle Powder 7760 8.1 7.2 112 6.9 8.2 84 Powder River Pass 9480 8.6 7.3 118 9.3 8.8 106 Soldier Park 8720 4.7 -M * 6.0 -M * ----- ----- Basin Index (%) 120 98 TONGUE RIVER Big Goose 7990 6.1 5.8 105 6.6 7.4 89 Bone Springs Div 9350 10.8 11.0 98 9.1 10.8 84 Burgess Junction 7880 8.1 7.5 108 7.7 8.4 92 Dome Lake 8880 8.4 7.9 106 7.6 9.3 82 Little Goose 8870 6.5 -M * 8.1 -M * Sucker Creek 8880 8.8 8.1 109 8.8 9.8 90 Tie Creek 6870 4.2 4.0 105 7.5 7.9 95 ----- ----- Basin Index (%) 105 88 BELLE FOURCHE Cole Canyon 5910 2.7 4.6 59 5.9 6.7 88 ----- ----- Basin Index (%) 59 88 CHEYENNE RIVER BASIN Blind Park 6890 4.4 5.7 77 7.1 8.8 81 North Rapid Creek 6130 5.4 5.4 100 7.3 7.1 103 ----- ----- Basin Index (%) 88 91 UPPER N. PLATTE Arapaho Ridge 10960 12.7 15.1 84 14.0 16.3 86 Blackhall Mtn 9820 16.2 -M * 19.1 -M * Columbine 9160 15.0 17.8 84 16.3 18.8 87 Divide Peak 8880 5.2 14.3 36 9.3 15.7 59 Joe Wright 10120 12.0 15.0 80 19.3 18.3 105 Laprele Creek 8375 5.1 6.8 75 5.7 8.6 66 Med Bow 10500 23.2 -M * 21.1 -M * North French Creek 10130 17.6 19.4 91 17.6 19.4 91 Never Summer 10280 11.5 14.4 80 11.8 -M * Old Battle 10000 16.4 22.4 73 16.8 25.9 65 Rawah 9020 7.8 7.5 104 10.9 10.0 109 Sage Creek Basin 7850 5.5 10.0 55 -M 11.1 * Sand Lake 10050 16.5 19.0 87 15.3 17.4 88 South Brush Creek 8440 6.2 8.8 70 7.1 10.7 66 Tower 10500 24.2 33.2 73 26.4 29.3 90 Webber Springs 9250 12.2 17.0 72 13.4 19.5 69 Willow Creek Pass 9540 6.6 8.7 76 8.6 9.4 91 Zirkel 9340 20.0 21.3 94 22.1 21.7 102 ----- ----- Basin Index (%) 78 84 SWEETWATER Deer Park 9700 7.6 10.0 76 10.2 14.1 72 Larsen Creek 9000 6.1 8.6 71 7.9 -M * South Pass 9040 8.1 10.4 78 8.2 12.5 66 ----- ----- Basin Index (%) 75 69 LOWER N. PLATTE Casper Mtn. 7900 6.4 9.2 70 6.4 10.3 62 Laprele Creek 8375 5.1 6.8 75 5.7 8.6 66 Reno Hill 8400 7.3 9.0 81 8.5 10.3 83 Windy Peak 7900 4.8 5.2 92 4.9 7.3 67 ----- ----- Basin Index (%) 78 70 LARAMIE RIVER Brooklyn Lake 10240 14.7 14.1 104 15.7 14.8 106 Cinnabar Park 9574 11.7 16.0 73 16.7 18.5 90 Crow Creek 8330 3.3 6.5 51 6.5 7.3 89 Deadman Hill 10220 11.3 11.6 97 11.3 11.7 97 Rawah 9020 7.8 7.5 104 10.9 10.0 109 Roach 9700 8.1 11.7 69 10.9 13.5 81 ----- ----- Basin Index (%) 84 95 S. PLATTE Black Mountain 8920 6.4 -M * 8.3 -M * Crow Creek 8330 3.3 6.5 51 6.5 7.3 89 Deadman Hill 10220 11.3 11.6 97 11.3 11.7 97 ----- ----- Basin Index (%) 81 94 LITTLE SNAKE RIVER Battle Mountain 7440 5.8 8.8 66 7.8 11.2 70 Divide Peak 8880 5.2 14.3 36 9.3 15.7 59 Elk River 8700 10.6 13.9 76 11.1 14.8 75 Little Snake River 8915 16.4 18.5 89 20.3 23.5 86 Old Battle 10000 16.4 22.4 73 16.8 25.9 65 Sage Creek Basin 7850 5.5 10.0 55 -M 11.1 * Sandstone RS 8150 5.6 10.0 56 -M 13.9 * Whiskey Park 8950 18.4 19.5 94 18.6 20.8 89 ----- ----- Basin Index (%) 71 75 UPPER GREEN RIVER Big Sandy Opening 9080 8.2 9.1 90 7.5 9.6 78 Blind Bull Sum 8650 20.8 16.5 126 14.3 14.8 97 East Rim Divide 7930 11.1 7.4 150 9.7 8.7 111 Elkhart Park G.S. 9400 8.7 8.7 100 9.3 9.6 97 Gros Ventre Summit 8750 10.1 9.1 111 8.3 9.3 89 Gunsight Pass 9820 10.7 9.8 109 10.4 10.1 103 Kendall R.S. 7740 10.7 9.1 118 10.2 10.6 96 Loomis Park 8240 13.1 10.7 122 13.6 12.9 105 New Fork Lake 8340 9.5 7.6 125 9.2 8.0 115 Pocket Creek 9360 6.3 -M * 4.8 -M * Snider Basin 8060 11.7 9.1 129 13.0 10.6 123 Spring Creek Divide 9000 21.3 16.6 128 20.7 17.8 116 Triple Peak 8500 21.0 15.6 135 22.3 18.3 122 ----- ----- Basin Index (%) 121 106 LOWER GREEN RIVER Blacks Fork Jct 8870 4.5 -M * 6.7 -M * Buck Pasture 9700 8.5 -M * 10.0 -M * EF Blacks Fork GS 9360 5.2 -M * 6.3 -M * Hams Fork 7840 8.5 8.5 100 7.3 8.4 87 Hewinta 9519 5.5 7.0 79 7.3 9.9 74 Hickerson Park 9145 4.6 5.2 88 5.1 7.0 73 Hole-in-Rock 9150 4.0 4.8 83 4.9 6.6 74 Indian Creek 9425 16.4 16.8 98 15.2 16.4 93 Kelley R.S. 8180 10.5 10.8 97 11.5 13.4 86 Spirit Lk 10235 5.0 -M * 7.3 -M * Steel Creek Park 10200 -M 10.4 * 8.8 11.4 77 ----- ----- Basin Index (%) 93 82 UPPER BEAR RIVER Bear River RS 8777 5.0 -M * 5.7 -M * Bug Lake 7950 11.5 13.4 86 10.0 14.3 70 Burts Miller Ranch 8000 3.1 -M * 2.9 -M * Chalk Creek #1 8993 10.9 16.3 67 11.6 18.0 64 Hayden Fork 9212 5.8 11.2 52 11.1 15.1 74 Kelley R.S. 8180 10.5 10.8 97 11.5 13.4 86 Lily Lake 9156 6.3 9.2 68 7.1 12.2 58 Monte Cristo 8960 15.3 19.1 80 14.6 18.8 78 Salt River Summit 7760 9.6 9.6 100 11.4 12.3 93 ----- ----- Basin Index (%) 78 74 ----------------------------------------------------------------------------- -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.