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 THURSDAY: MARCH 5 , 2015 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 14.5 13.7 106 16.0 17.6 91 Black Bear 8170 23.7 30.3 78 24.2 31.8 76 Blind Bull Sum 8650 21.4 18.5 116 14.7 16.4 90 Cottonwood Creek 7670 19.5 17.6 111 22.5 20.1 112 East Rim Divide 7930 11.3 8.7 130 10.0 9.8 102 Grand Targhee 9260 31.9 30.8 104 26.0 25.3 103 Granite Creek 6770 -M 14.1 * -M 16.9 * Grassy Lake 7265 24.6 26.7 92 24.8 30.2 82 Gros Ventre Summit 8750 10.6 10.3 103 8.7 10.4 84 Gunsight Pass 9820 11.5 10.9 106 11.1 11.1 100 Lewis Lake Divide 7850 20.7 25.5 81 23.3 29.7 78 Phillips Bench 8200 20.1 20.2 100 21.5 23.4 92 Salt River Summit 7760 -M 10.8 * -M 13.8 * Snake River Station 6920 13.7 14.5 94 16.8 19.1 88 Spring Creek Divide 9000 22.6 19.1 118 21.4 19.7 109 Thumb Divide 7980 9.1 12.5 73 10.2 15.1 68 Togwotee Pass 9580 20.5 18.6 110 22.0 19.9 111 Two Ocean Plateau 9240 22.7 21.9 104 20.3 22.3 91 Willow Creek 8380 21.2 23.1 92 24.7 27.5 90 Younts Peak 8350 -M 11.9 * -M 12.9 * ----- ----- Basin Index (%) 99 91 MADISON-GALLATIN Black Bear 8170 23.7 30.3 78 24.2 31.8 76 Canyon 7870 9.6 10.9 88 10.7 13.4 80 Madison Plateau 7750 13.7 18.2 75 14.1 21.9 64 West Yellowstone 6700 7.2 9.1 79 8.7 11.9 73 Whiskey Creek 6800 9.0 12.3 73 11.0 16.7 66 ----- ----- Basin Index (%) 78 72 YELLOWSTONE Beartooth Lake 9360 18.1 17.5 103 17.3 16.2 107 Burnt Mtn 5880 3.7 4.2 88 11.2 9.7 115 Canyon 7870 9.6 10.9 88 10.7 13.4 80 Cole Creek 7850 11.9 10.5 113 11.0 9.3 118 Evening Star 9200 22.6 19.8 114 23.7 22.6 105 Fisher Creek 9100 26.9 26.2 103 24.8 26.2 95 Northeast Entrance 7350 9.5 8.5 112 12.1 10.1 120 Parker Peak 9400 19.1 16.3 117 18.2 14.4 126 Sylvan Lake 8420 14.2 16.3 87 16.7 18.4 91 Thumb Divide 7980 9.1 12.5 73 10.2 15.1 68 Two Ocean Plateau 9240 22.7 21.9 104 20.3 22.3 91 White Mill 8700 22.2 18.7 119 20.6 19.5 106 Wolverine 7650 11.0 8.7 126 12.0 10.2 118 ----- ----- Basin Index (%) 104 101 WIND RIVER Burroughs Creek 8750 12.8 -M * 14.6 -M * Castle Creek 8400 7.8 -M * 7.7 -M * Cold Springs 9630 6.6 5.6 118 7.2 7.7 94 Deer Park 9700 9.5 11.1 86 11.8 15.6 76 Hobbs Park 10100 8.3 10.2 81 8.6 9.8 88 Kirwin 9550 9.3 7.3 127 10.8 9.0 120 Little Warm 9370 8.8 8.2 107 9.8 10.1 97 Owl Creek 8975 4.5 4.0 112 5.9 4.4 134 South Pass 9040 9.3 11.9 78 9.6 13.9 69 St. Lawrence Alt 8620 4.2 5.5 76 5.6 6.7 84 Togwotee Pass 9580 20.5 18.6 110 22.0 19.9 111 Townsend Creek 8700 5.6 6.9 81 7.5 9.0 83 ----- ----- Basin Index (%) 97 93 BIGHORN BASIN Bald Mtn. 9380 14.2 15.3 93 10.8 13.4 81 Bear Trap Meadow 8200 7.6 4.5 169 6.9 6.3 110 Bone Springs Div 9350 12.6 12.7 99 10.5 12.0 88 Grave Springs 8550 7.7 7.1 108 6.8 8.1 84 Kirwin 9550 9.3 7.3 127 10.8 9.0 120 Marquette 8760 5.2 -M * 7.0 -M * Middle Powder 7760 10.3 8.4 123 8.6 9.0 96 Owl Creek 8975 4.5 4.0 112 5.9 4.4 134 Powder River Pass 9480 9.9 8.1 122 10.7 9.8 109 Shell Creek 9580 10.8 12.0 90 10.3 10.8 95 Timber Creek 7950 5.4 3.9 138 7.1 5.4 131 ----- ----- Basin Index (%) 111 100 SHOSHONE RIVER Blackwater 9780 17.3 17.9 97 18.0 16.5 109 Evening Star 9200 22.6 19.8 114 23.7 22.6 105 Marquette 8760 5.2 -M * 7.0 -M * Sylvan Road 7120 10.2 9.8 104 13.7 14.2 96 Younts Peak 8350 -M 11.9 * -M 12.9 * ----- ----- Basin Index (%) 105 104 POWDER RIVER Bear Trap Meadow 8200 7.6 4.5 169 6.9 6.3 110 Cloud Peak Reservoir 9860 12.2 10.8 113 10.9 9.8 111 Grave Springs 8550 7.7 7.1 108 6.8 8.1 84 Hansen Sawmill 8360 6.2 4.8 129 7.2 6.2 116 Middle Powder 7760 10.3 8.4 123 8.6 9.0 96 Powder River Pass 9480 9.9 8.1 122 10.7 9.8 109 Soldier Park 8720 5.3 -M * 6.8 -M * ----- ----- Basin Index (%) 123 104 TONGUE RIVER Big Goose 7990 7.2 6.4 112 7.9 8.0 99 Bone Springs Div 9350 12.6 12.7 99 10.5 12.0 88 Burgess Junction 7880 9.5 8.7 109 9.1 9.3 98 Dome Lake 8880 9.7 8.9 109 8.8 10.2 86 Little Goose 8870 8.0 -M * 9.5 -M * Sucker Creek 8880 10.4 9.4 111 10.4 10.9 95 Tie Creek 6870 4.0 4.5 89 8.8 8.6 102 ----- ----- Basin Index (%) 106 94 BELLE FOURCHE Cole Canyon 5910 3.7 4.9 76 6.9 7.2 96 ----- ----- Basin Index (%) 76 96 CHEYENNE RIVER BASIN Blind Park 6890 5.8 6.5 89 7.8 9.6 81 North Rapid Creek 6130 6.0 6.0 100 8.2 7.8 105 ----- ----- Basin Index (%) 94 92 UPPER N. PLATTE Arapaho Ridge 10960 15.5 17.1 91 16.7 18.1 92 Blackhall Mtn 9820 20.4 -M * 23.0 -M * Columbine 9160 18.2 20.4 89 19.2 20.7 93 Divide Peak 8880 7.7 16.4 47 11.8 17.2 69 Joe Wright 10120 15.1 17.4 87 22.7 20.5 111 Laprele Creek 8375 6.5 7.9 82 7.3 9.6 76 Med Bow 10500 26.9 -M * 24.1 -M * North French Creek 10130 19.9 21.4 93 20.1 21.4 94 Never Summer 10280 14.4 16.4 88 13.9 -M * Old Battle 10000 20.1 24.5 82 20.4 28.5 72 Rawah 9020 10.1 8.9 113 12.9 11.2 115 Sage Creek Basin 7850 7.7 10.8 71 7.0 12.0 58 Sand Lake 10050 19.4 21.5 90 18.0 19.4 93 South Brush Creek 8440 8.1 10.7 76 9.0 12.0 75 Tower 10500 -M 37.2 * -M 32.7 * Webber Springs 9250 15.9 19.2 83 16.9 21.6 78 Willow Creek Pass 9540 8.6 9.8 88 10.5 10.6 99 Zirkel 9340 24.3 23.9 102 25.6 23.6 108 ----- ----- Basin Index (%) 86 89 SWEETWATER Deer Park 9700 9.5 11.1 86 11.8 15.6 76 Larsen Creek 9000 6.9 9.8 70 8.9 -M * South Pass 9040 9.3 11.9 78 9.6 13.9 69 ----- ----- Basin Index (%) 78 73 LOWER N. PLATTE Casper Mtn. 7900 8.7 10.7 81 8.2 11.4 72 Laprele Creek 8375 6.5 7.9 82 7.3 9.6 76 Reno Hill 8400 9.3 10.7 87 10.5 11.4 92 Windy Peak 7900 6.1 6.0 102 6.2 8.0 78 ----- ----- Basin Index (%) 87 80 LARAMIE RIVER Brooklyn Lake 10240 17.3 15.7 110 18.3 16.5 111 Cinnabar Park 9574 12.5 17.5 71 18.6 19.9 93 Crow Creek 8330 4.4 6.9 64 7.9 8.0 99 Deadman Hill 10220 14.0 12.6 111 14.0 13.2 106 Rawah 9020 10.1 8.9 113 12.9 11.2 115 Roach 9700 10.2 12.7 80 13.0 15.1 86 ----- ----- Basin Index (%) 92 101 S. PLATTE Black Mountain 8920 8.0 -M * 10.3 -M * Crow Creek 8330 4.4 6.9 64 7.9 8.0 99 Deadman Hill 10220 14.0 12.6 111 14.0 13.2 106 ----- ----- Basin Index (%) 94 103 LITTLE SNAKE RIVER Battle Mountain 7440 7.2 10.1 71 9.1 12.3 74 Divide Peak 8880 7.7 16.4 47 11.8 17.2 69 Elk River 8700 13.5 16.2 83 13.4 16.3 82 Little Snake River 8915 19.0 20.0 95 23.0 25.2 91 Old Battle 10000 20.1 24.5 82 20.4 28.5 72 Sage Creek Basin 7850 7.7 10.8 71 7.0 12.0 58 Sandstone RS 8150 6.9 11.1 62 -M 15.4 * Whiskey Park 8950 21.9 22.2 99 21.2 22.8 93 ----- ----- Basin Index (%) 79 79 UPPER GREEN RIVER Big Sandy Opening 9080 9.1 10.4 88 8.5 10.8 79 Blind Bull Sum 8650 21.4 18.5 116 14.7 16.4 90 East Rim Divide 7930 11.3 8.7 130 10.0 9.8 102 Elkhart Park G.S. 9400 9.3 9.7 96 9.8 10.8 91 Gros Ventre Summit 8750 10.6 10.3 103 8.7 10.4 84 Gunsight Pass 9820 11.5 10.9 106 11.1 11.1 100 Kendall R.S. 7740 11.1 10.0 111 10.7 12.0 89 Loomis Park 8240 13.4 12.2 110 14.1 14.4 98 New Fork Lake 8340 9.6 8.4 114 9.7 9.0 108 Pocket Creek 9360 6.9 -M * 5.5 -M * Snider Basin 8060 12.5 10.1 124 13.4 11.8 114 Spring Creek Divide 9000 22.6 19.1 118 21.4 19.7 109 Triple Peak 8500 21.6 17.6 123 23.0 20.8 111 ----- ----- Basin Index (%) 112 99 LOWER GREEN RIVER Blacks Fork Jct 8870 5.8 -M * 8.2 -M * Buck Pasture 9700 10.2 -M * 11.7 -M * EF Blacks Fork GS 9360 6.5 -M * 7.7 -M * Hams Fork 7840 9.2 9.6 96 7.8 9.4 83 Hewinta 9519 7.4 8.2 90 8.8 11.1 79 Hickerson Park 9145 5.4 6.1 89 5.8 7.8 74 Hole-in-Rock 9150 4.9 5.8 84 6.0 7.3 82 Indian Creek 9425 17.3 19.4 89 16.0 18.4 87 Kelley R.S. 8180 11.1 12.3 90 12.1 14.9 81 Spirit Lk 10235 6.5 -M * 9.0 -M * Steel Creek Park 10200 5.9 12.0 49 10.7 12.8 84 ----- ----- Basin Index (%) 83 82 UPPER BEAR RIVER Bear River RS 8777 5.6 -M * 6.8 -M * Bug Lake 7950 12.7 15.3 83 11.0 15.9 69 Burts Miller Ranch 8000 4.4 -M * 3.5 -M * Chalk Creek #1 8993 13.2 18.8 70 14.0 20.1 70 Hayden Fork 9212 7.9 12.4 64 12.8 16.8 76 Kelley R.S. 8180 11.1 12.3 90 12.1 14.9 81 Lily Lake 9156 7.7 10.6 73 8.3 13.6 61 Monte Cristo 8960 16.7 21.9 76 16.0 21.0 76 Salt River Summit 7760 -M 10.8 * -M 13.8 * ----- ----- Basin Index (%) 76 73 ----------------------------------------------------------------------------- -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.