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 SUNDAY: MARCH 11 , 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 18.2 18.3 99 Black Bear 8170 38.1 31.5 121 35.1 33.1 106 Blind Bull Sum 8650 28.6 19.4 147 17.1 16.9 101 Cottonwood Creek 7670 19.0 18.5 103 20.9 20.7 101 East Rim Divide 7930 10.5 9.4 112 10.2 10.2 100 Grand Targhee 9260 40.4 31.9 127 26.2 25.7 102 Granite Creek 6770 16.0 14.6 110 17.8 17.5 102 Grassy Lake 7265 28.0 27.6 101 31.2 31.2 100 Gros Ventre Summit 8750 12.0 10.9 110 12.1 10.9 111 Gunsight Pass 9820 13.6 11.6 117 13.3 11.6 115 Lewis Lake Divide 7850 34.1 26.5 129 34.7 30.8 113 Phillips Bench 8200 22.1 21.2 104 22.9 24.2 95 Salt River Summit 7640 9.3 11.2 83 10.7 14.2 75 Snake River Station 6920 16.7 15.2 110 21.2 19.6 108 Spring Creek Divide 9000 22.4 19.6 114 21.2 20.4 104 Thumb Divide 7980 16.9 13.2 128 16.7 15.8 106 Togwotee Pass 9580 27.8 19.5 143 28.2 20.7 136 Two Ocean Plateau 9240 33.5 23.1 145 -M 23.3 * Willow Creek 8080 27.9 24.1 116 30.0 28.5 105 Younts Peak 8350 -M 12.4 * -M 13.4 * ----- ----- Basin Index (%) 120 105 MADISON-GALLATIN Black Bear 8170 38.1 31.5 121 35.1 33.1 106 Canyon 7870 15.8 11.5 137 17.7 14.0 126 Madison Plateau 7750 24.2 19.3 125 23.9 22.8 105 West Yellowstone 6700 12.3 9.7 127 15.4 12.4 124 Whiskey Creek 6800 14.7 13.2 111 16.9 17.4 97 ----- ----- Basin Index (%) 123 109 YELLOWSTONE Beartooth Lake 9360 35.7 18.4 194 30.8 16.8 183 Burnt Mtn 5880 7.0 4.3 163 13.0 10.2 127 Canyon 7870 15.8 11.5 137 17.7 14.0 126 Cole Creek 7850 12.9 11.2 115 8.3 9.9 84 Evening Star 9200 36.5 20.9 175 31.1 23.4 133 Fisher Creek 9100 47.6 27.0 176 41.2 27.2 151 Northeast Entrance 7350 13.4 8.6 156 16.3 10.5 155 Parker Peak 9400 30.0 16.7 180 23.0 15.0 153 Sylvan Lake 8420 22.2 17.0 131 23.6 19.0 124 Thumb Divide 7980 16.9 13.2 128 16.7 15.8 106 Two Ocean Plateau 9240 33.5 23.1 145 -M 23.3 * White Mill 8700 37.5 19.2 195 28.4 20.3 140 Wolverine 7650 19.9 9.0 221 19.0 10.5 181 ----- ----- Basin Index (%) 164 140 WIND RIVER Burroughs Creek 8750 14.5 -M * 16.4 -M * Castle Creek 8400 7.8 -M * 8.9 -M * Cold Springs 9630 8.3 5.9 141 8.8 8.0 110 Deer Park 9700 9.5 12.1 79 12.2 16.3 75 Hobbs Park 10100 13.9 11.0 126 11.9 10.4 114 Kirwin 9550 17.7 7.8 227 16.1 9.4 171 Little Warm 9370 13.4 8.7 154 14.1 10.5 134 Owl Creek 8975 3.5 4.3 81 5.3 4.6 115 South Pass 9040 9.4 12.5 75 -M 14.5 * St. Lawrence Alt 8620 2.8 5.9 47 7.0 7.0 100 Togwotee Pass 9580 27.8 19.5 143 28.2 20.7 136 Townsend Creek 8700 5.9 7.4 80 7.2 9.4 77 ----- ----- Basin Index (%) 118 115 BIGHORN BASIN Bald Mtn. 9380 18.1 16.0 113 12.5 13.9 90 Bear Trap Meadow 8200 8.1 4.7 172 8.6 6.6 130 Bone Springs Div 9350 16.1 13.3 121 11.9 12.6 94 Grave Springs 8550 5.5 7.5 73 4.4 8.3 53 Kirwin 9550 17.7 7.8 227 16.1 9.4 171 Marquette 8760 5.0 -M * 8.7 -M * Middle Powder 7760 7.3 8.8 83 -M 9.3 * Owl Creek 8975 3.5 4.3 81 5.3 4.6 115 Powder River Pass 9480 14.4 8.5 169 13.1 10.2 128 Shell Creek 9580 17.8 12.3 145 13.5 11.2 121 Timber Creek 7950 3.0 4.1 73 -M 5.6 * ----- ----- Basin Index (%) 128 111 SHOSHONE RIVER Blackwater 9780 31.0 19.1 162 29.0 17.2 169 Evening Star 9200 36.5 20.9 175 31.1 23.4 133 Marquette 8760 5.0 -M * 8.7 -M * Sylvan Road 7120 13.8 10.0 138 19.3 14.6 132 Younts Peak 8350 -M 12.4 * -M 13.4 * ----- ----- Basin Index (%) 163 144 POWDER RIVER Bear Trap Meadow 8200 8.1 4.7 172 8.6 6.6 130 Cloud Peak Reservoir 9860 13.1 11.8 111 11.5 10.3 112 Grave Springs 8550 5.5 7.5 73 4.4 8.3 53 Hansen Sawmill 8360 6.6 5.2 127 7.9 6.5 122 Middle Powder 7760 7.3 8.8 83 -M 9.3 * Powder River Pass 9480 14.4 8.5 169 13.1 10.2 128 Soldier Park 8720 5.3 -M * 7.9 -M * ----- ----- Basin Index (%) 118 109 TONGUE RIVER Big Goose 7990 6.1 6.9 88 6.5 8.4 77 Bone Springs Div 9350 16.1 13.3 121 11.9 12.6 94 Burgess Junction 7880 7.7 9.3 83 6.7 9.7 69 Dome Lake 8880 12.3 9.4 131 9.4 10.6 89 Little Goose 8870 7.4 -M * 9.5 -M * Sucker Creek 8880 8.5 10.1 84 6.4 11.4 56 Tie Creek 6870 3.5 4.7 74 6.9 9.0 77 ----- ----- Basin Index (%) 101 77 BELLE FOURCHE Cole Canyon 5910 5.8 5.1 114 7.4 7.4 100 ----- ----- Basin Index (%) 114 100 CHEYENNE RIVER BASIN Blind Park 6890 6.6 6.8 97 9.5 10.0 95 North Rapid Creek 6130 6.4 6.3 102 6.9 8.1 85 ----- ----- Basin Index (%) 99 91 UPPER N. PLATTE Arapaho Ridge 10960 16.5 17.7 93 16.2 18.8 86 Blackhall Mtn 9820 23.3 -M * 22.9 -M * Columbine 9160 19.4 21.1 92 18.1 21.8 83 Divide Peak 8880 11.5 17.0 68 15.1 18.0 84 Joe Wright 10120 13.5 18.4 73 22.8 21.4 107 Laprele Creek 8375 5.4 8.5 64 6.8 10.1 67 Med Bow 10500 34.1 -M * 27.7 -M * North French Creek 10130 22.4 23.0 97 22.1 22.5 98 Never Summer 10280 14.7 17.0 86 11.8 -M * Old Battle 10000 21.4 25.6 84 20.9 29.8 70 Rawah 9020 9.1 9.3 98 12.2 11.5 106 Sage Creek Basin 7850 8.0 11.6 69 8.4 12.4 68 Sand Lake 10050 21.9 22.6 97 18.5 20.4 91 South Brush Creek 8440 7.9 11.1 71 9.6 12.6 76 Tower 10500 28.5 38.2 75 25.1 33.9 74 Webber Springs 9250 16.2 20.2 80 18.7 22.6 83 Willow Creek Pass 9540 10.6 10.3 103 11.4 11.0 104 Zirkel 9340 23.2 25.2 92 27.0 24.6 110 ----- ----- Basin Index (%) 84 87 SWEETWATER Deer Park 9700 9.5 12.1 79 12.2 16.3 75 Larsen Creek 9000 9.2 10.4 88 9.4 -M * South Pass 9040 9.4 12.5 75 -M 14.5 * ----- ----- Basin Index (%) 80 75* LOWER N. PLATTE Casper Mtn. 7900 6.3 11.5 55 5.1 11.9 43 Laprele Creek 8375 5.4 8.5 64 6.8 10.1 67 Reno Hill 8400 7.8 11.2 70 8.9 12.0 74 Windy Peak 7900 4.9 6.6 74 6.6 8.5 78 ----- ----- Basin Index (%) 65 64 LARAMIE RIVER Brooklyn Lake 10240 20.6 16.8 123 21.2 17.4 122 Cinnabar Park 9574 18.9 17.8 106 21.4 20.6 104 Crow Creek 8330 2.3 7.1 32 8.1 8.4 96 Deadman Hill 10220 16.1 13.0 124 15.5 14.0 111 Rawah 9020 9.1 9.3 98 12.2 11.5 106 Roach 9700 11.4 13.4 85 14.4 15.9 91 ----- ----- Basin Index (%) 101 106 S. PLATTE Black Mountain 8920 7.6 -M * 10.4 -M * Crow Creek 8330 2.3 7.1 32 8.1 8.4 96 Deadman Hill 10220 16.1 13.0 124 15.5 14.0 111 ----- ----- Basin Index (%) 92 105 LITTLE SNAKE RIVER Battle Mountain 7440 5.8 10.6 55 -M 12.9 * Divide Peak 8880 11.5 17.0 68 15.1 18.0 84 Elk River 8700 13.1 16.9 78 13.8 17.1 81 Little Snake River 8915 18.3 20.3 90 23.7 25.8 92 Old Battle 10000 21.4 25.6 84 20.9 29.8 70 Sage Creek Basin 7850 8.0 11.6 69 8.4 12.4 68 Sandstone RS 8150 7.1 11.8 60 7.0 16.0 44 Whiskey Park 8950 20.3 23.3 87 21.7 23.9 91 ----- ----- Basin Index (%) 77 77 UPPER GREEN RIVER Big Sandy Opening 9080 10.6 10.8 98 10.5 11.2 94 Blind Bull Sum 8650 28.6 19.4 147 17.1 16.9 101 East Rim Divide 7930 10.5 9.4 112 10.2 10.2 100 Elkhart Park G.S. 9400 10.4 10.1 103 10.0 11.1 90 Gros Ventre Summit 8750 12.0 10.9 110 12.1 10.9 111 Gunsight Pass 9820 13.6 11.6 117 13.3 11.6 115 Kendall R.S. 7740 13.0 10.5 124 13.4 12.5 107 Loomis Park 8240 15.0 12.7 118 15.8 14.9 106 New Fork Lake 8340 10.3 9.0 114 9.5 9.3 102 Pocket Creek 9360 7.0 -M * 7.0 -M * Snider Basin 8060 11.4 10.6 108 13.1 12.2 107 Spring Creek Divide 9000 22.4 19.6 114 21.2 20.4 104 Triple Peak 8500 25.1 18.6 135 27.0 21.6 125 ----- ----- Basin Index (%) 119 106 LOWER GREEN RIVER Blacks Fork Jct 8869 6.0 -M * 7.3 -M * Buck Pasture 9632 9.2 -M * 10.1 -M * EF Blacks Fork GS 9360 9.2 -M * -M -M * Hams Fork 7840 8.0 10.0 80 7.8 9.6 81 Hewinta 9500 6.7 8.6 78 9.0 11.5 78 Hickerson Park 9122 6.1 6.4 95 5.3 8.1 65 Hole-in-Rock 9168 5.2 6.1 85 5.6 7.6 74 Indian Creek 9425 17.7 20.3 87 13.1 19.0 69 Kelley R.S. 8180 11.1 12.7 87 12.2 15.4 79 Spirit Lk 10235 6.2 -M * 7.7 -M * Steel Creek Park 10158 10.8 12.6 86 10.9 13.3 82 ----- ----- Basin Index (%) 86 76 UPPER BEAR RIVER Bear River RS 8777 7.4 -M * 8.5 -M * Bug Lake 7987 13.3 16.1 83 13.4 16.4 82 Burts Miller Ranch 8000 4.1 -M * 5.2 -M * Chalk Creek #1 9171 11.6 20.0 58 12.8 20.8 62 Hayden Fork 9130 10.1 13.4 75 12.5 17.4 72 Kelley R.S. 8180 11.1 12.7 87 12.2 15.4 79 Lily Lake 9133 7.2 11.1 65 9.0 14.1 64 Monte Cristo 8932 16.8 22.9 73 16.3 21.8 75 Salt River Summit 7640 9.3 11.2 83 10.7 14.2 75 ----- ----- Basin Index (%) 74 72 ----------------------------------------------------------------------------- -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.