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: MARCH 7 , 2018 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 16.6 13.7 121 18.0 17.9 101 Black Bear 8170 37.8 30.7 123 34.9 32.3 108 Blind Bull Sum 8650 27.9 18.9 148 16.9 16.5 102 Cottonwood Creek 7670 19.0 18.1 105 20.6 20.3 101 East Rim Divide 7930 10.3 9.0 114 10.1 10.0 101 Grand Targhee 9260 40.3 31.2 129 25.9 25.3 102 Granite Creek 6770 15.7 14.3 110 17.6 17.2 102 Grassy Lake 7265 28.0 27.1 103 31.1 30.6 102 Gros Ventre Summit 8750 11.4 10.6 108 11.8 10.6 111 Gunsight Pass 9820 13.2 11.2 118 13.0 11.3 115 Lewis Lake Divide 7850 34.1 25.8 132 -M 30.1 * Phillips Bench 8200 21.8 20.6 106 22.7 23.7 96 Salt River Summit 7640 9.2 10.9 84 10.5 14.0 75 Snake River Station 6920 16.7 14.8 113 21.1 19.4 109 Spring Creek Divide 9000 22.3 19.4 115 21.0 20.0 105 Thumb Divide 7980 16.6 12.7 131 16.6 15.4 108 Togwotee Pass 9580 27.2 19.0 143 27.6 20.2 137 Two Ocean Plateau 9240 33.1 22.3 148 -M 22.7 * Willow Creek 8080 27.7 23.6 117 29.8 27.8 107 Younts Peak 8350 -M 12.1 * -M 13.1 * ----- ----- Basin Index (%) 121 105 MADISON-GALLATIN Black Bear 8170 37.8 30.7 123 34.9 32.3 108 Canyon 7870 15.6 11.2 139 17.5 13.6 129 Madison Plateau 7750 24.2 18.6 130 23.7 22.2 107 West Yellowstone 6700 12.4 9.3 133 15.3 12.1 126 Whiskey Creek 6800 14.7 12.6 117 16.9 17.0 99 ----- ----- Basin Index (%) 127 111 YELLOWSTONE Beartooth Lake 9360 35.3 17.8 198 30.7 16.4 187 Burnt Mtn 5880 7.0 4.3 163 13.0 9.8 133 Canyon 7870 15.6 11.2 139 17.5 13.6 129 Cole Creek 7850 12.6 10.8 117 8.3 9.5 87 Evening Star 9200 35.9 20.3 177 33.3 22.9 145 Fisher Creek 9100 46.5 26.5 175 40.6 26.5 153 Northeast Entrance 7350 13.3 8.6 155 16.1 10.3 156 Parker Peak 9400 29.6 16.4 180 23.3 14.6 160 Sylvan Lake 8420 22.0 16.6 133 23.4 18.6 126 Thumb Divide 7980 16.6 12.7 131 16.6 15.4 108 Two Ocean Plateau 9240 33.1 22.3 148 -M 22.7 * White Mill 8700 36.9 18.8 196 27.7 19.8 140 Wolverine 7650 19.7 8.9 221 18.8 10.3 183 ----- ----- Basin Index (%) 166 143 WIND RIVER Burroughs Creek 8750 14.4 -M * 16.3 -M * Castle Creek 8400 7.6 -M * 8.9 -M * Cold Springs 9630 8.2 5.7 144 8.7 7.8 112 Deer Park 9700 9.3 11.4 82 12.0 15.9 75 Hobbs Park 10100 13.7 10.6 129 11.9 10.1 118 Kirwin 9550 17.1 7.5 228 15.6 9.1 171 Little Warm 9370 13.4 8.4 160 14.0 10.3 136 Owl Creek 8975 3.5 4.2 83 5.2 4.5 116 South Pass 9040 9.3 12.2 76 6.6 14.2 46 St. Lawrence Alt 8620 3.0 5.7 53 7.1 6.8 104 Togwotee Pass 9580 27.2 19.0 143 27.6 20.2 137 Townsend Creek 8700 6.0 7.2 83 7.2 9.1 79 ----- ----- Basin Index (%) 120 107 BIGHORN BASIN Bald Mtn. 9380 17.9 15.6 115 12.4 13.6 91 Bear Trap Meadow 8200 8.0 4.6 174 8.5 6.4 133 Bone Springs Div 9350 16.0 13.0 123 11.8 12.3 96 Grave Springs 8550 5.4 7.2 75 4.5 8.2 55 Kirwin 9550 17.1 7.5 228 15.6 9.1 171 Marquette 8760 4.9 -M * 8.6 -M * Middle Powder 7760 7.1 8.5 84 5.0 9.1 55 Owl Creek 8975 3.5 4.2 83 5.2 4.5 116 Powder River Pass 9480 14.4 8.2 176 13.0 10.0 130 Shell Creek 9580 17.7 12.1 146 13.4 11.0 122 Timber Creek 7950 2.8 4.0 70 2.1 5.4 39 ----- ----- Basin Index (%) 129 102 SHOSHONE RIVER Blackwater 9780 30.4 18.4 165 28.4 16.7 170 Evening Star 9200 35.9 20.3 177 33.3 22.9 145 Marquette 8760 4.9 -M * 8.6 -M * Sylvan Road 7120 13.3 9.9 134 19.2 14.4 133 Younts Peak 8350 -M 12.1 * -M 13.1 * ----- ----- Basin Index (%) 164 150 POWDER RIVER Bear Trap Meadow 8200 8.0 4.6 174 8.5 6.4 133 Cloud Peak Reservoir 9860 12.8 11.2 114 11.2 10.0 112 Grave Springs 8550 5.4 7.2 75 4.5 8.2 55 Hansen Sawmill 8360 6.6 4.9 135 8.0 6.4 125 Middle Powder 7760 7.1 8.5 84 5.0 9.1 55 Powder River Pass 9480 14.4 8.2 176 13.0 10.0 130 Soldier Park 8720 5.2 -M * 7.7 -M * ----- ----- Basin Index (%) 122 100 TONGUE RIVER Big Goose 7990 6.0 6.5 92 6.5 8.2 79 Bone Springs Div 9350 16.0 13.0 123 11.8 12.3 96 Burgess Junction 7880 7.5 8.9 84 6.7 9.5 71 Dome Lake 8880 12.1 9.1 133 9.4 10.4 90 Little Goose 8870 7.3 -M * 9.3 -M * Sucker Creek 8880 8.3 9.7 86 6.3 11.1 57 Tie Creek 6870 3.5 4.6 76 7.1 8.8 81 ----- ----- Basin Index (%) 103 79 BELLE FOURCHE Cole Canyon 5910 5.6 4.9 114 7.6 7.3 104 ----- ----- Basin Index (%) 114 104 CHEYENNE RIVER BASIN Blind Park 6890 6.8 6.6 103 9.4 9.8 96 North Rapid Creek 6130 6.3 6.1 103 6.8 7.9 86 ----- ----- Basin Index (%) 103 92 UPPER N. PLATTE Arapaho Ridge 10960 16.4 17.3 95 16.0 18.3 87 Blackhall Mtn 9820 23.1 -M * 22.7 -M * Columbine 9160 19.2 20.7 93 18.3 21.1 87 Divide Peak 8880 11.5 16.6 69 15.1 17.5 86 Joe Wright 10120 13.2 17.8 74 22.4 20.9 107 Laprele Creek 8375 5.4 8.0 68 6.8 9.8 69 Med Bow 10500 33.8 -M * 27.6 -M * North French Creek 10130 22.4 21.8 103 22.0 21.8 101 Never Summer 10280 14.5 16.6 87 11.6 -M * Old Battle 10000 21.4 24.9 86 20.7 29.0 71 Rawah 9020 9.3 9.0 103 12.0 11.3 106 Sage Creek Basin 7850 7.8 11.0 71 8.4 12.1 69 Sand Lake 10050 21.7 21.8 100 18.3 19.8 92 South Brush Creek 8440 8.5 10.9 78 9.5 12.2 78 Tower 10500 28.4 37.6 76 25.1 33.1 76 Webber Springs 9250 16.3 19.6 83 18.8 22.0 85 Willow Creek Pass 9540 10.6 10.0 106 11.2 10.8 104 Zirkel 9340 22.9 24.5 93 26.8 23.8 113 ----- ----- Basin Index (%) 87 89 SWEETWATER Deer Park 9700 9.3 11.4 82 12.0 15.9 75 Larsen Creek 9000 9.3 10.0 93 9.4 -M * South Pass 9040 9.3 12.2 76 6.6 14.2 46 ----- ----- Basin Index (%) 83 62 LOWER N. PLATTE Casper Mtn. 7900 6.3 11.1 57 5.1 11.6 44 Laprele Creek 8375 5.4 8.0 68 6.8 9.8 69 Reno Hill 8400 7.8 10.9 72 8.8 11.7 75 Windy Peak 7900 5.0 6.2 81 6.5 8.2 79 ----- ----- Basin Index (%) 68 66 LARAMIE RIVER Brooklyn Lake 10240 20.5 16.1 127 21.2 16.9 125 Cinnabar Park 9574 18.8 17.6 107 20.8 20.1 103 Crow Creek 8330 2.4 7.0 34 8.1 8.2 99 Deadman Hill 10220 16.0 12.7 126 15.4 13.5 114 Rawah 9020 9.3 9.0 103 12.0 11.3 106 Roach 9700 11.3 12.9 88 14.3 15.5 92 ----- ----- Basin Index (%) 104 107 S. PLATTE Black Mountain 8920 7.5 -M * 10.2 -M * Crow Creek 8330 2.4 7.0 34 8.1 8.2 99 Deadman Hill 10220 16.0 12.7 126 15.4 13.5 114 ----- ----- Basin Index (%) 93 108 LITTLE SNAKE RIVER Battle Mountain 7440 5.8 10.2 57 6.7 12.6 53 Divide Peak 8880 11.5 16.6 69 15.1 17.5 86 Elk River 8700 12.9 16.5 78 13.7 16.6 83 Little Snake River 8915 18.2 20.1 91 23.7 25.5 93 Old Battle 10000 21.4 24.9 86 20.7 29.0 71 Sage Creek Basin 7850 7.8 11.0 71 8.4 12.1 69 Sandstone RS 8150 7.4 11.5 64 6.9 15.6 44 Whiskey Park 8950 20.3 22.6 90 21.6 23.2 93 ----- ----- Basin Index (%) 79 77 UPPER GREEN RIVER Big Sandy Opening 9080 10.4 10.5 99 10.3 10.9 94 Blind Bull Sum 8650 27.9 18.9 148 16.9 16.5 102 East Rim Divide 7930 10.3 9.0 114 10.1 10.0 101 Elkhart Park G.S. 9400 10.2 9.8 104 9.9 10.9 91 Gros Ventre Summit 8750 11.4 10.6 108 11.8 10.6 111 Gunsight Pass 9820 13.2 11.2 118 13.0 11.3 115 Kendall R.S. 7740 12.7 10.3 123 13.1 12.2 107 Loomis Park 8240 14.7 12.4 119 15.4 14.6 105 New Fork Lake 8340 10.0 8.7 115 -M 9.1 * Pocket Creek 9360 7.0 -M * 6.9 -M * Snider Basin 8060 11.3 10.4 109 13.0 12.0 108 Spring Creek Divide 9000 22.3 19.4 115 21.0 20.0 105 Triple Peak 8500 24.8 18.0 138 26.6 21.1 126 ----- ----- Basin Index (%) 120 107 LOWER GREEN RIVER Blacks Fork Jct 8869 5.7 -M * 7.3 -M * Buck Pasture 9632 9.0 -M * 10.2 -M * EF Blacks Fork GS 9360 9.2 -M * -M -M * Hams Fork 7840 7.9 9.8 81 7.8 9.5 82 Hewinta 9500 6.5 8.4 77 8.9 11.3 79 Hickerson Park 9122 5.9 6.2 95 5.1 8.0 64 Hole-in-Rock 9168 5.0 5.9 85 5.5 7.4 74 Indian Creek 9425 17.6 19.7 89 13.0 18.6 70 Kelley R.S. 8180 10.9 12.4 88 12.1 15.1 80 Spirit Lk 10235 6.1 -M * 7.6 -M * Steel Creek Park 10158 10.5 12.2 86 10.9 12.9 84 ----- ----- Basin Index (%) 86 76 UPPER BEAR RIVER Bear River RS 8777 7.3 -M * 8.5 -M * Bug Lake 7987 13.1 15.6 84 13.3 16.1 83 Burts Miller Ranch 8000 4.0 -M * 5.0 -M * Chalk Creek #1 9171 11.5 19.2 60 12.8 20.4 63 Hayden Fork 9130 9.9 12.6 79 12.4 17.1 73 Kelley R.S. 8180 10.9 12.4 88 12.1 15.1 80 Lily Lake 9133 7.1 10.7 66 9.0 13.8 65 Monte Cristo 8932 16.6 22.3 74 16.1 21.3 76 Salt River Summit 7640 9.2 10.9 84 10.5 14.0 75 ----- ----- 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.