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: MARCH 10 , 2018 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 16.7 13.8 121 18.1 18.2 99 Black Bear 8170 38.1 31.3 122 35.1 32.9 107 Blind Bull Sum 8650 28.7 19.3 149 17.2 16.8 102 Cottonwood Creek 7670 19.0 18.4 103 20.9 20.7 101 East Rim Divide 7930 10.6 9.4 113 10.4 10.2 102 Grand Targhee 9260 40.3 31.7 127 26.2 25.5 103 Granite Creek 6770 16.1 14.6 110 17.8 17.5 102 Grassy Lake 7265 28.1 27.5 102 31.3 31.1 101 Gros Ventre Summit 8750 11.9 10.8 110 12.0 10.8 111 Gunsight Pass 9820 13.6 11.5 118 13.3 11.6 115 Lewis Lake Divide 7850 34.2 26.3 130 -M 30.6 * Phillips Bench 8200 22.2 21.1 105 22.9 24.1 95 Salt River Summit 7640 9.4 11.1 85 10.7 14.2 75 Snake River Station 6920 16.7 15.1 111 21.3 19.6 109 Spring Creek Divide 9000 22.4 19.6 114 21.3 20.3 105 Thumb Divide 7980 16.9 13.1 129 16.7 15.7 106 Togwotee Pass 9580 27.6 19.4 142 27.9 20.6 135 Two Ocean Plateau 9240 33.6 22.9 147 -M 23.2 * Willow Creek 8080 27.9 24.1 116 30.0 28.3 106 Younts Peak 8350 -M 12.3 * -M 13.4 * ----- ----- Basin Index (%) 120 104 MADISON-GALLATIN Black Bear 8170 38.1 31.3 122 35.1 32.9 107 Canyon 7870 15.8 11.4 139 17.7 13.9 127 Madison Plateau 7750 24.3 19.2 127 23.9 22.7 105 West Yellowstone 6700 12.4 9.6 129 15.4 12.4 124 Whiskey Creek 6800 14.8 13.1 113 17.0 17.3 98 ----- ----- Basin Index (%) 125 110 YELLOWSTONE Beartooth Lake 9360 35.8 18.2 197 30.9 16.7 185 Burnt Mtn 5880 7.0 4.4 159 13.1 10.2 128 Canyon 7870 15.8 11.4 139 17.7 13.9 127 Cole Creek 7850 12.8 11.1 115 8.3 9.8 85 Evening Star 9200 36.5 20.8 175 31.1 23.3 133 Fisher Creek 9100 47.6 26.9 177 41.1 27.0 152 Northeast Entrance 7350 13.4 8.6 156 16.4 10.5 156 Parker Peak 9400 30.2 16.6 182 22.9 14.9 154 Sylvan Lake 8420 22.1 16.9 131 23.7 19.0 125 Thumb Divide 7980 16.9 13.1 129 16.7 15.7 106 Two Ocean Plateau 9240 33.6 22.9 147 -M 23.2 * White Mill 8700 37.5 19.1 196 28.3 20.2 140 Wolverine 7650 20.0 9.0 222 19.2 10.5 183 ----- ----- Basin Index (%) 165 141 WIND RIVER Burroughs Creek 8750 14.6 -M * 16.7 -M * Castle Creek 8400 7.8 -M * 9.0 -M * Cold Springs 9630 8.4 5.9 142 8.9 8.0 111 Deer Park 9700 9.5 12.0 79 12.3 16.2 76 Hobbs Park 10100 14.1 10.9 129 12.1 10.3 117 Kirwin 9550 17.8 7.7 231 16.0 9.4 170 Little Warm 9370 13.6 8.6 158 14.2 10.5 135 Owl Creek 8975 3.6 4.3 84 5.3 4.6 115 South Pass 9040 9.5 12.5 76 -M 14.4 * St. Lawrence Alt 8620 3.0 5.8 52 7.2 7.0 103 Togwotee Pass 9580 27.6 19.4 142 27.9 20.6 135 Townsend Creek 8700 6.1 7.4 82 7.5 9.3 81 ----- ----- Basin Index (%) 120 116 BIGHORN BASIN Bald Mtn. 9380 18.0 15.9 113 12.6 13.9 91 Bear Trap Meadow 8200 8.1 4.6 176 8.6 6.5 132 Bone Springs Div 9350 16.0 13.3 120 12.0 12.5 96 Grave Springs 8550 5.5 7.4 74 4.5 8.3 54 Kirwin 9550 17.8 7.7 231 16.0 9.4 170 Marquette 8760 5.0 -M * 8.7 -M * Middle Powder 7760 7.2 8.8 82 -M 9.2 * Owl Creek 8975 3.6 4.3 84 5.3 4.6 115 Powder River Pass 9480 14.3 8.4 170 13.2 10.1 131 Shell Creek 9580 17.9 12.2 147 13.5 11.1 122 Timber Creek 7950 2.9 4.0 72 -M 5.5 * ----- ----- Basin Index (%) 129 112 SHOSHONE RIVER Blackwater 9780 31.1 19.0 164 28.6 17.2 166 Evening Star 9200 36.5 20.8 175 31.1 23.3 133 Marquette 8760 5.0 -M * 8.7 -M * Sylvan Road 7120 13.7 10.0 137 19.3 14.6 132 Younts Peak 8350 -M 12.3 * -M 13.4 * ----- ----- Basin Index (%) 163 143 POWDER RIVER Bear Trap Meadow 8200 8.1 4.6 176 8.6 6.5 132 Cloud Peak Reservoir 9860 13.1 11.7 112 11.6 10.3 113 Grave Springs 8550 5.5 7.4 74 4.5 8.3 54 Hansen Sawmill 8360 6.7 5.1 131 8.1 6.5 125 Middle Powder 7760 7.2 8.8 82 -M 9.2 * Powder River Pass 9480 14.3 8.4 170 13.2 10.1 131 Soldier Park 8720 5.4 -M * 7.9 -M * ----- ----- Basin Index (%) 119 110 TONGUE RIVER Big Goose 7990 6.2 6.8 91 6.7 8.4 80 Bone Springs Div 9350 16.0 13.3 120 12.0 12.5 96 Burgess Junction 7880 7.7 9.2 84 6.9 9.6 72 Dome Lake 8880 12.4 9.3 133 9.5 10.6 90 Little Goose 8870 7.4 -M * 9.6 -M * Sucker Creek 8880 8.4 10.0 84 6.5 11.3 58 Tie Creek 6870 3.6 4.7 77 7.2 9.0 80 ----- ----- Basin Index (%) 102 79 BELLE FOURCHE Cole Canyon 5910 5.6 5.0 112 7.5 7.4 101 ----- ----- Basin Index (%) 112 101 CHEYENNE RIVER BASIN Blind Park 6890 6.8 6.7 101 9.5 9.9 96 North Rapid Creek 6130 6.5 6.2 105 7.0 8.1 86 ----- ----- Basin Index (%) 103 92 UPPER N. PLATTE Arapaho Ridge 10960 16.6 17.6 94 16.3 18.7 87 Blackhall Mtn 9820 23.2 -M * 22.8 -M * Columbine 9160 19.4 21.0 92 19.8 21.6 92 Divide Peak 8880 11.6 16.9 69 15.2 17.9 85 Joe Wright 10120 13.5 18.3 74 22.6 21.3 106 Laprele Creek 8375 5.5 8.4 65 6.9 10.0 69 Med Bow 10500 34.0 -M * 27.8 -M * North French Creek 10130 22.4 22.8 98 22.1 22.3 99 Never Summer 10280 14.9 16.9 88 11.8 -M * Old Battle 10000 21.5 25.4 85 21.0 29.6 71 Rawah 9020 9.1 9.2 99 12.3 11.5 107 Sage Creek Basin 7850 8.1 11.5 70 8.5 12.3 69 Sand Lake 10050 22.0 22.4 98 18.6 20.2 92 South Brush Creek 8440 8.0 11.1 72 9.5 12.5 76 Tower 10500 28.4 38.0 75 25.4 33.8 75 Webber Springs 9250 16.3 20.1 81 18.8 22.4 84 Willow Creek Pass 9540 10.7 10.3 104 11.5 10.9 106 Zirkel 9340 23.1 25.2 92 26.9 24.5 110 ----- ----- Basin Index (%) 85 88 SWEETWATER Deer Park 9700 9.5 12.0 79 12.3 16.2 76 Larsen Creek 9000 9.5 10.3 92 9.6 -M * South Pass 9040 9.5 12.5 76 -M 14.4 * ----- ----- Basin Index (%) 82 76* LOWER N. PLATTE Casper Mtn. 7900 6.3 11.4 55 5.4 11.8 46 Laprele Creek 8375 5.5 8.4 65 6.9 10.0 69 Reno Hill 8400 7.9 11.2 71 9.0 12.0 75 Windy Peak 7900 5.1 6.5 78 6.8 8.4 81 ----- ----- Basin Index (%) 66 67 LARAMIE RIVER Brooklyn Lake 10240 20.6 16.7 123 21.2 17.3 123 Cinnabar Park 9574 19.0 17.8 107 21.6 20.6 105 Crow Creek 8330 2.3 7.1 32 8.2 8.4 98 Deadman Hill 10220 16.1 12.9 125 15.5 13.8 112 Rawah 9020 9.1 9.2 99 12.3 11.5 107 Roach 9700 11.4 13.3 86 14.4 15.8 91 ----- ----- Basin Index (%) 102 107 S. PLATTE Black Mountain 8920 7.5 -M * 10.3 -M * Crow Creek 8330 2.3 7.1 32 8.2 8.4 98 Deadman Hill 10220 16.1 12.9 125 15.5 13.8 112 ----- ----- Basin Index (%) 92 107 LITTLE SNAKE RIVER Battle Mountain 7440 5.6 10.5 53 8.5 12.8 66 Divide Peak 8880 11.6 16.9 69 15.2 17.9 85 Elk River 8700 12.9 16.8 77 13.7 17.0 81 Little Snake River 8915 18.4 20.3 91 23.8 25.7 93 Old Battle 10000 21.5 25.4 85 21.0 29.6 71 Sage Creek Basin 7850 8.1 11.5 70 8.5 12.3 69 Sandstone RS 8150 7.3 11.8 62 7.1 15.9 45 Whiskey Park 8950 20.4 23.2 88 21.7 23.8 91 ----- ----- Basin Index (%) 78 77 UPPER GREEN RIVER Big Sandy Opening 9080 10.7 10.7 100 10.6 11.1 95 Blind Bull Sum 8650 28.7 19.3 149 17.2 16.8 102 East Rim Divide 7930 10.6 9.4 113 10.4 10.2 102 Elkhart Park G.S. 9400 10.5 10.0 105 10.1 11.1 91 Gros Ventre Summit 8750 11.9 10.8 110 12.0 10.8 111 Gunsight Pass 9820 13.6 11.5 118 13.3 11.6 115 Kendall R.S. 7740 13.1 10.5 125 13.4 12.5 107 Loomis Park 8240 15.1 12.6 120 15.8 14.9 106 New Fork Lake 8340 10.3 9.0 114 9.7 9.3 104 Pocket Creek 9360 7.2 -M * 7.2 -M * Snider Basin 8060 11.6 10.6 109 13.4 12.1 111 Spring Creek Divide 9000 22.4 19.6 114 21.3 20.3 105 Triple Peak 8500 25.2 18.5 136 27.1 21.5 126 ----- ----- Basin Index (%) 120 107 LOWER GREEN RIVER Blacks Fork Jct 8869 6.0 -M * 7.3 -M * Buck Pasture 9632 9.1 -M * 10.0 -M * EF Blacks Fork GS 9360 9.2 -M * -M -M * Hams Fork 7840 8.1 9.9 82 7.9 9.6 82 Hewinta 9500 6.6 8.6 77 9.2 11.5 80 Hickerson Park 9122 5.7 6.4 89 5.5 8.1 68 Hole-in-Rock 9168 5.1 6.0 85 5.8 7.6 76 Indian Creek 9425 17.8 20.2 88 13.2 18.9 70 Kelley R.S. 8180 11.2 12.6 89 12.3 15.4 80 Spirit Lk 10235 6.2 -M * 7.7 -M * Steel Creek Park 10158 10.7 12.5 86 10.8 13.2 82 ----- ----- Basin Index (%) 86 77 UPPER BEAR RIVER Bear River RS 8777 7.3 -M * 8.6 -M * Bug Lake 7987 13.2 16.0 82 13.4 16.3 82 Burts Miller Ranch 8000 4.0 -M * 5.3 -M * Chalk Creek #1 9171 11.6 19.8 59 12.8 20.7 62 Hayden Fork 9130 10.0 13.2 76 12.5 17.4 72 Kelley R.S. 8180 11.2 12.6 89 12.3 15.4 80 Lily Lake 9133 7.2 11.0 65 9.0 14.0 64 Monte Cristo 8932 16.7 22.8 73 16.3 21.7 75 Salt River Summit 7640 9.4 11.1 85 10.7 14.2 75 ----- ----- Basin Index (%) 74 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.