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 FRIDAY: MARCH 2 , 2018 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 15.7 13.6 115 17.1 17.4 98 Black Bear 8170 36.1 29.7 122 33.8 31.0 109 Blind Bull Sum 8650 26.6 18.0 148 16.1 16.0 101 Cottonwood Creek 7670 17.6 17.1 103 19.3 19.7 98 East Rim Divide 7930 10.0 8.2 122 9.9 9.6 103 Grand Targhee 9260 36.9 30.3 122 24.1 25.0 96 Granite Creek 6770 15.0 13.8 109 17.0 16.6 102 Grassy Lake 7265 26.3 26.3 100 29.4 29.6 99 Gros Ventre Summit 8750 10.6 9.8 108 10.9 10.2 107 Gunsight Pass 9820 12.5 10.6 118 12.4 10.9 114 Lewis Lake Divide 7850 32.6 25.2 129 -M 29.0 * Phillips Bench 8200 20.1 19.8 102 21.2 22.9 93 Salt River Summit 7640 8.4 10.7 79 10.3 13.5 76 Snake River Station 6920 15.8 14.3 110 20.1 18.7 107 Spring Creek Divide 9000 21.2 18.7 113 20.1 19.3 104 Thumb Divide 7980 15.5 12.3 126 15.6 14.7 106 Togwotee Pass 9580 25.0 17.9 140 25.6 19.5 131 Two Ocean Plateau 9240 31.6 21.6 146 -M 21.8 * Willow Creek 8080 26.1 22.4 117 28.4 27.0 105 Younts Peak 8350 -M 11.7 * -M 12.7 * ----- ----- Basin Index (%) 119 103 MADISON-GALLATIN Black Bear 8170 36.1 29.7 122 33.8 31.0 109 Canyon 7870 14.8 10.6 140 16.7 13.1 127 Madison Plateau 7750 23.1 17.9 129 22.6 21.3 106 West Yellowstone 6700 11.9 9.0 132 14.7 11.7 126 Whiskey Creek 6800 13.8 12.1 114 15.9 16.3 98 ----- ----- Basin Index (%) 126 111 YELLOWSTONE Beartooth Lake 9360 34.4 16.9 204 29.1 15.8 184 Burnt Mtn 5880 6.3 4.0 158 12.4 9.6 129 Canyon 7870 14.8 10.6 140 16.7 13.1 127 Cole Creek 7850 11.8 10.1 117 7.9 9.1 87 Evening Star 9200 34.9 19.2 182 31.0 22.2 140 Fisher Creek 9100 45.0 25.9 174 39.0 25.7 152 Northeast Entrance 7350 12.6 8.3 152 15.5 9.9 157 Parker Peak 9400 28.6 16.1 178 22.8 14.1 162 Sylvan Lake 8420 20.5 15.9 129 22.0 18.0 122 Thumb Divide 7980 15.5 12.3 126 15.6 14.7 106 Two Ocean Plateau 9240 31.6 21.6 146 -M 21.8 * White Mill 8700 35.9 18.4 195 26.6 19.1 139 Wolverine 7650 18.8 8.5 221 18.1 10.0 181 ----- ----- Basin Index (%) 165 142 WIND RIVER Burroughs Creek 8750 13.9 -M * 15.9 -M * Castle Creek 8400 7.4 -M * 8.6 -M * Cold Springs 9630 7.7 5.5 140 8.4 7.5 112 Deer Park 9700 9.1 10.8 84 11.9 15.4 77 Hobbs Park 10100 13.7 9.8 140 11.8 9.5 124 Kirwin 9550 16.6 7.0 237 14.9 8.8 169 Little Warm 9370 12.9 8.0 161 13.5 9.9 136 Owl Creek 8975 3.4 3.9 87 5.2 4.3 121 South Pass 9040 9.2 11.5 80 -M 13.5 * St. Lawrence Alt 8620 3.0 5.2 58 7.1 6.6 108 Togwotee Pass 9580 25.0 17.9 140 25.6 19.5 131 Townsend Creek 8700 6.0 6.6 91 7.3 8.7 84 ----- ----- Basin Index (%) 124 117 BIGHORN BASIN Bald Mtn. 9380 17.3 14.8 117 12.2 13.2 92 Bear Trap Meadow 8200 7.9 4.4 180 8.5 6.2 137 Bone Springs Div 9350 15.5 12.2 127 11.7 11.8 99 Grave Springs 8550 5.4 6.9 78 4.5 8.0 56 Kirwin 9550 16.6 7.0 237 14.9 8.8 169 Marquette 8760 4.4 -M * 8.0 -M * Middle Powder 7760 6.9 8.1 85 -M 8.8 * Owl Creek 8975 3.4 3.9 87 5.2 4.3 121 Powder River Pass 9480 14.1 8.0 176 12.9 9.6 134 Shell Creek 9580 17.5 11.7 150 13.4 10.7 125 Timber Creek 7950 2.7 3.8 71 -M 5.3 * ----- ----- Basin Index (%) 133 115 SHOSHONE RIVER Blackwater 9780 28.8 17.3 166 26.8 16.2 165 Evening Star 9200 34.9 19.2 182 31.0 22.2 140 Marquette 8760 4.4 -M * 8.0 -M * Sylvan Road 7120 12.6 9.5 133 18.2 13.9 131 Younts Peak 8350 -M 11.7 * -M 12.7 * ----- ----- Basin Index (%) 166 145 POWDER RIVER Bear Trap Meadow 8200 7.9 4.4 180 8.5 6.2 137 Cloud Peak Reservoir 9860 12.8 10.4 123 11.3 9.6 118 Grave Springs 8550 5.4 6.9 78 4.5 8.0 56 Hansen Sawmill 8360 6.7 4.7 143 8.0 6.1 131 Middle Powder 7760 6.9 8.1 85 -M 8.8 * Powder River Pass 9480 14.1 8.0 176 12.9 9.6 134 Soldier Park 8720 5.5 -M * 7.7 -M * ----- ----- Basin Index (%) 127 114 TONGUE RIVER Big Goose 7990 6.1 6.2 98 6.6 7.9 84 Bone Springs Div 9350 15.5 12.2 127 11.7 11.8 99 Burgess Junction 7880 7.5 8.3 90 6.8 9.0 76 Dome Lake 8880 11.9 8.7 137 9.4 10.0 94 Little Goose 8870 7.3 -M * 9.4 -M * Sucker Creek 8880 8.3 9.0 92 6.4 10.7 60 Tie Creek 6870 3.6 4.3 84 7.1 8.5 84 ----- ----- Basin Index (%) 109 83 BELLE FOURCHE Cole Canyon 5910 5.5 4.9 112 7.6 7.1 107 ----- ----- Basin Index (%) 112 107 CHEYENNE RIVER BASIN Blind Park 6890 7.0 6.4 109 9.5 9.5 100 North Rapid Creek 6130 6.5 5.9 110 6.9 7.7 90 ----- ----- Basin Index (%) 110 95 UPPER N. PLATTE Arapaho Ridge 10960 16.0 16.8 95 15.8 17.8 89 Blackhall Mtn 9820 22.4 -M * 21.9 -M * Columbine 9160 18.4 19.9 92 19.1 20.4 94 Divide Peak 8880 11.1 15.9 70 14.7 16.8 88 Joe Wright 10120 13.4 16.8 80 22.1 20.0 110 Laprele Creek 8375 5.4 7.8 69 6.9 9.3 74 Med Bow 10500 32.9 -M * 27.4 -M * North French Creek 10130 21.9 21.1 104 21.7 21.1 103 Never Summer 10280 14.5 16.3 89 11.7 -M * Old Battle 10000 20.7 24.1 86 20.0 28.0 71 Rawah 9020 8.9 8.8 101 12.2 11.0 111 Sage Creek Basin 7850 7.6 10.6 72 8.3 11.8 70 Sand Lake 10050 21.3 21.2 100 17.9 19.0 94 South Brush Creek 8440 8.1 10.3 79 9.6 11.8 81 Tower 10500 27.1 36.5 74 25.0 32.0 78 Webber Springs 9250 15.5 18.8 82 18.0 21.2 85 Willow Creek Pass 9540 10.6 9.6 110 11.3 10.4 109 Zirkel 9340 21.6 23.1 94 25.8 23.6 109 ----- ----- Basin Index (%) 87 91 SWEETWATER Deer Park 9700 9.1 10.8 84 11.9 15.4 77 Larsen Creek 9000 9.2 9.6 96 9.3 -M * South Pass 9040 9.2 11.5 80 -M 13.5 * ----- ----- Basin Index (%) 86 77* LOWER N. PLATTE Casper Mtn. 7900 6.3 10.3 61 5.3 11.2 47 Laprele Creek 8375 5.4 7.8 69 6.9 9.3 74 Reno Hill 8400 7.8 10.2 76 8.8 11.1 79 Windy Peak 7900 5.1 5.8 88 6.6 7.8 85 ----- ----- Basin Index (%) 72 70 LARAMIE RIVER Brooklyn Lake 10240 19.8 15.1 131 20.3 16.1 126 Cinnabar Park 9574 18.4 17.2 107 20.7 19.8 105 Crow Creek 8330 2.5 6.7 37 8.2 7.8 105 Deadman Hill 10220 15.9 12.5 127 15.3 12.8 120 Rawah 9020 8.9 8.8 101 12.2 11.0 111 Roach 9700 11.3 12.5 90 14.3 14.7 97 ----- ----- Basin Index (%) 105 111 S. PLATTE Black Mountain 8920 7.6 -M * 10.2 -M * Crow Creek 8330 2.5 6.7 37 8.2 7.8 105 Deadman Hill 10220 15.9 12.5 127 15.3 12.8 120 ----- ----- Basin Index (%) 96 114 LITTLE SNAKE RIVER Battle Mountain 7440 5.3 9.9 54 8.1 12.1 67 Divide Peak 8880 11.1 15.9 70 14.7 16.8 88 Elk River 8700 12.2 15.7 78 13.2 16.0 82 Little Snake River 8915 17.6 19.8 89 22.8 25.1 91 Old Battle 10000 20.7 24.1 86 20.0 28.0 71 Sage Creek Basin 7850 7.6 10.6 72 8.3 11.8 70 Sandstone RS 8150 7.3 10.5 70 6.9 15.1 46 Whiskey Park 8950 18.9 21.7 87 20.7 22.4 92 ----- ----- Basin Index (%) 79 78 UPPER GREEN RIVER Big Sandy Opening 9080 10.3 10.2 101 10.3 10.6 97 Blind Bull Sum 8650 26.6 18.0 148 16.1 16.0 101 East Rim Divide 7930 10.0 8.2 122 9.9 9.6 103 Elkhart Park G.S. 9400 9.9 9.5 104 9.5 10.6 90 Gros Ventre Summit 8750 10.6 9.8 108 10.9 10.2 107 Gunsight Pass 9820 12.5 10.6 118 12.4 10.9 114 Kendall R.S. 7740 12.6 9.8 129 13.0 11.7 111 Loomis Park 8240 14.4 11.8 122 15.1 14.1 107 New Fork Lake 8340 9.9 8.3 119 -M 8.8 * Pocket Creek 9360 7.1 -M * 6.9 -M * Snider Basin 8060 10.7 9.7 110 12.5 11.6 108 Spring Creek Divide 9000 21.2 18.7 113 20.1 19.3 104 Triple Peak 8500 23.3 17.0 137 25.3 20.3 125 ----- ----- Basin Index (%) 121 107 LOWER GREEN RIVER Blacks Fork Jct 8869 5.8 -M * 7.1 -M * Buck Pasture 9632 8.6 -M * 9.8 -M * EF Blacks Fork GS 9360 7.3 -M * -M -M * Hams Fork 7840 7.6 9.3 82 7.5 9.2 82 Hewinta 9500 6.2 8.0 78 8.9 10.9 82 Hickerson Park 9122 6.0 6.0 100 5.4 7.6 71 Hole-in-Rock 9168 5.1 5.6 91 5.7 7.1 80 Indian Creek 9425 16.8 19.0 88 12.4 17.9 69 Kelley R.S. 8180 10.3 12.2 84 11.6 14.6 79 Spirit Lk 10235 6.3 -M * 7.5 -M * Steel Creek Park 10158 9.8 11.6 84 10.5 12.5 84 ----- ----- Basin Index (%) 86 78 UPPER BEAR RIVER Bear River RS 8777 6.9 -M * 8.4 -M * Bug Lake 7987 12.5 14.9 84 12.9 15.5 83 Burts Miller Ranch 8000 4.1 -M * 5.2 -M * Chalk Creek #1 9171 11.1 18.5 60 12.3 19.5 63 Hayden Fork 9130 9.4 12.2 77 12.0 16.4 73 Kelley R.S. 8180 10.3 12.2 84 11.6 14.6 79 Lily Lake 9133 8.0 10.4 77 9.0 13.3 68 Monte Cristo 8932 15.7 21.2 74 15.6 20.6 76 Salt River Summit 7640 8.4 10.7 79 10.3 13.5 76 ----- ----- Basin Index (%) 75 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.