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 MONDAY: MARCH 5 , 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 17.9 17.6 102 Black Bear 8170 37.6 30.3 124 34.8 31.8 109 Blind Bull Sum 8650 27.6 18.5 149 16.9 16.4 103 Cottonwood Creek 7670 18.6 17.6 106 20.2 20.1 100 East Rim Divide 7930 10.3 8.7 118 10.1 9.8 103 Grand Targhee 9260 40.2 30.8 131 25.7 25.3 102 Granite Creek 6770 15.6 14.1 111 17.5 16.9 104 Grassy Lake 7265 27.9 26.7 104 31.0 30.2 103 Gros Ventre Summit 8750 11.4 10.3 111 11.8 10.4 113 Gunsight Pass 9820 13.2 10.9 121 13.0 11.1 117 Lewis Lake Divide 7850 34.0 25.5 133 -M 29.7 * Phillips Bench 8200 21.8 20.2 108 22.6 23.4 97 Salt River Summit 7640 9.0 10.8 83 10.5 13.8 76 Snake River Station 6920 16.7 14.5 115 20.7 19.1 108 Spring Creek Divide 9000 22.0 19.1 115 20.8 19.7 106 Thumb Divide 7980 16.5 12.5 132 16.5 15.1 109 Togwotee Pass 9580 27.0 18.6 145 27.3 19.9 137 Two Ocean Plateau 9240 32.9 21.9 150 -M 22.3 * Willow Creek 8080 27.2 23.1 118 29.4 27.5 107 Younts Peak 8350 -M 11.9 * -M 12.9 * ----- ----- Basin Index (%) 123 106 MADISON-GALLATIN Black Bear 8170 37.6 30.3 124 34.8 31.8 109 Canyon 7870 15.6 10.9 143 17.4 13.4 130 Madison Plateau 7750 24.1 18.2 132 23.6 21.9 108 West Yellowstone 6700 12.3 9.1 135 15.3 11.9 129 Whiskey Creek 6800 14.6 12.3 119 16.8 16.7 101 ----- ----- Basin Index (%) 129 113 YELLOWSTONE Beartooth Lake 9360 35.0 17.5 200 30.6 16.1 190 Burnt Mtn 5880 -M 4.2 * 12.9 9.7 133 Canyon 7870 15.6 10.9 143 17.4 13.4 130 Cole Creek 7850 12.4 10.5 118 7.9 9.3 85 Evening Star 9200 35.6 19.8 180 31.0 22.6 137 Fisher Creek 9100 46.1 26.2 176 40.3 26.2 154 Northeast Entrance 7350 13.2 8.5 155 16.0 10.1 158 Parker Peak 9400 29.5 16.3 181 22.7 14.4 158 Sylvan Lake 8420 21.8 16.3 134 23.4 18.4 127 Thumb Divide 7980 16.5 12.5 132 16.5 15.1 109 Two Ocean Plateau 9240 32.9 21.9 150 -M 22.3 * White Mill 8700 36.7 18.7 196 27.4 19.5 141 Wolverine 7650 19.6 8.7 225 18.6 10.2 182 ----- ----- Basin Index (%) 168 143 WIND RIVER Burroughs Creek 8750 14.4 -M * 16.0 -M * Castle Creek 8400 7.7 -M * 8.9 -M * Cold Springs 9630 8.1 5.6 145 8.5 7.7 110 Deer Park 9700 9.3 11.1 84 11.9 15.6 76 Hobbs Park 10100 13.6 10.2 133 11.6 9.8 118 Kirwin 9550 17.1 7.3 234 15.5 9.0 172 Little Warm 9370 13.3 8.2 162 13.8 10.1 137 Owl Creek 8975 3.5 4.0 88 5.2 4.4 118 South Pass 9040 9.3 11.9 78 -M 13.9 * St. Lawrence Alt 8620 2.7 5.5 49 7.0 6.7 104 Togwotee Pass 9580 27.0 18.6 145 27.3 19.9 137 Townsend Creek 8700 5.8 6.9 84 7.1 9.0 79 ----- ----- Basin Index (%) 123 117 BIGHORN BASIN Bald Mtn. 9380 17.5 15.3 114 12.1 13.4 90 Bear Trap Meadow 8200 7.7 4.5 171 8.5 6.3 135 Bone Springs Div 9350 15.6 12.7 123 11.6 12.0 97 Grave Springs 8550 5.4 7.1 76 4.4 8.1 54 Kirwin 9550 17.1 7.3 234 15.5 9.0 172 Marquette 8760 4.8 -M * 8.6 -M * Middle Powder 7760 7.0 8.4 83 -M 9.0 * Owl Creek 8975 3.5 4.0 88 5.2 4.4 118 Powder River Pass 9480 14.2 8.1 175 12.9 9.8 132 Shell Creek 9580 17.6 12.0 147 13.3 10.8 123 Timber Creek 7950 2.8 3.9 72 -M 5.4 * ----- ----- Basin Index (%) 130 113 SHOSHONE RIVER Blackwater 9780 30.3 17.9 169 28.0 16.5 170 Evening Star 9200 35.6 19.8 180 31.0 22.6 137 Marquette 8760 4.8 -M * 8.6 -M * Sylvan Road 7120 13.4 9.8 137 19.1 14.2 135 Younts Peak 8350 -M 11.9 * -M 12.9 * ----- ----- Basin Index (%) 167 147 POWDER RIVER Bear Trap Meadow 8200 7.7 4.5 171 8.5 6.3 135 Cloud Peak Reservoir 9860 12.7 10.8 118 11.1 9.8 113 Grave Springs 8550 5.4 7.1 76 4.4 8.1 54 Hansen Sawmill 8360 6.6 4.8 138 7.9 6.2 127 Middle Powder 7760 7.0 8.4 83 -M 9.0 * Powder River Pass 9480 14.2 8.1 175 12.9 9.8 132 Soldier Park 8720 5.2 -M * 7.7 -M * ----- ----- Basin Index (%) 123 111 TONGUE RIVER Big Goose 7990 5.9 6.4 92 6.5 8.0 81 Bone Springs Div 9350 15.6 12.7 123 11.6 12.0 97 Burgess Junction 7880 7.4 8.7 85 6.7 9.3 72 Dome Lake 8880 11.8 8.9 133 9.4 10.2 92 Little Goose 8870 7.2 -M * 9.2 -M * Sucker Creek 8880 8.2 9.4 87 6.2 10.9 57 Tie Creek 6870 3.4 4.5 76 6.9 8.7 79 ----- ----- Basin Index (%) 103 80 BELLE FOURCHE Cole Canyon 5910 5.6 4.9 114 7.4 7.2 103 ----- ----- Basin Index (%) 114 103 CHEYENNE RIVER BASIN Blind Park 6890 6.8 6.5 105 9.3 9.6 97 North Rapid Creek 6130 6.4 6.0 107 6.7 7.8 86 ----- ----- Basin Index (%) 106 92 UPPER N. PLATTE Arapaho Ridge 10960 16.1 17.1 94 15.8 18.1 87 Blackhall Mtn 9820 22.5 -M * 21.9 -M * Columbine 9160 18.8 20.4 92 18.8 20.7 91 Divide Peak 8880 11.4 16.4 70 15.0 17.2 87 Joe Wright 10120 13.3 17.4 76 22.3 20.5 109 Laprele Creek 8375 5.4 7.9 68 6.9 9.6 72 Med Bow 10500 33.1 -M * 27.5 -M * North French Creek 10130 22.2 21.4 104 21.9 21.4 102 Never Summer 10280 14.5 16.4 88 11.7 -M * Old Battle 10000 21.0 24.5 86 20.1 28.5 71 Rawah 9020 9.0 8.9 101 12.0 11.2 107 Sage Creek Basin 7850 7.6 10.8 70 8.5 12.0 71 Sand Lake 10050 21.6 21.5 100 17.9 19.4 92 South Brush Creek 8440 8.4 10.7 79 9.6 12.0 80 Tower 10500 27.9 37.2 75 25.1 32.7 77 Webber Springs 9250 15.9 19.2 83 18.3 21.6 85 Willow Creek Pass 9540 10.6 9.8 108 11.2 10.6 106 Zirkel 9340 22.3 23.9 93 26.0 23.6 110 ----- ----- Basin Index (%) 87 89 SWEETWATER Deer Park 9700 9.3 11.1 84 11.9 15.6 76 Larsen Creek 9000 9.2 9.8 94 9.4 -M * South Pass 9040 9.3 11.9 78 -M 13.9 * ----- ----- Basin Index (%) 85 76* LOWER N. PLATTE Casper Mtn. 7900 6.3 10.7 59 5.2 11.4 46 Laprele Creek 8375 5.4 7.9 68 6.9 9.6 72 Reno Hill 8400 7.8 10.7 73 8.7 11.4 76 Windy Peak 7900 5.0 6.0 83 6.6 8.0 82 ----- ----- Basin Index (%) 69 68 LARAMIE RIVER Brooklyn Lake 10240 20.0 15.7 127 20.4 16.5 124 Cinnabar Park 9574 18.5 17.5 106 21.0 19.9 106 Crow Creek 8330 2.4 6.9 35 8.1 8.0 101 Deadman Hill 10220 16.0 12.6 127 15.3 13.2 116 Rawah 9020 9.0 8.9 101 12.0 11.2 107 Roach 9700 11.3 12.7 89 14.2 15.1 94 ----- ----- Basin Index (%) 104 108 S. PLATTE Black Mountain 8920 7.4 -M * 10.1 -M * Crow Creek 8330 2.4 6.9 35 8.1 8.0 101 Deadman Hill 10220 16.0 12.6 127 15.3 13.2 116 ----- ----- Basin Index (%) 94 110 LITTLE SNAKE RIVER Battle Mountain 7440 5.7 10.1 56 7.1 12.3 58 Divide Peak 8880 11.4 16.4 70 15.0 17.2 87 Elk River 8700 12.5 16.2 77 13.3 16.3 82 Little Snake River 8915 17.9 20.0 90 23.2 25.2 92 Old Battle 10000 21.0 24.5 86 20.1 28.5 71 Sage Creek Basin 7850 7.6 10.8 70 8.5 12.0 71 Sandstone RS 8150 7.4 11.1 67 6.9 15.4 45 Whiskey Park 8950 19.7 22.2 89 20.8 22.8 91 ----- ----- Basin Index (%) 79 77 UPPER GREEN RIVER Big Sandy Opening 9080 10.4 10.4 100 10.4 10.8 96 Blind Bull Sum 8650 27.6 18.5 149 16.9 16.4 103 East Rim Divide 7930 10.3 8.7 118 10.1 9.8 103 Elkhart Park G.S. 9400 10.2 9.7 105 9.8 10.8 91 Gros Ventre Summit 8750 11.4 10.3 111 11.8 10.4 113 Gunsight Pass 9820 13.2 10.9 121 13.0 11.1 117 Kendall R.S. 7740 12.7 10.0 127 13.1 12.0 109 Loomis Park 8240 14.7 12.2 120 15.4 14.4 107 New Fork Lake 8340 10.1 8.4 120 9.2 8.9 103 Pocket Creek 9360 7.1 -M * 7.0 -M * Snider Basin 8060 11.2 10.1 111 12.9 11.8 109 Spring Creek Divide 9000 22.0 19.1 115 20.8 19.7 106 Triple Peak 8500 24.3 17.6 138 26.4 20.8 127 ----- ----- Basin Index (%) 122 108 LOWER GREEN RIVER Blacks Fork Jct 8869 5.9 -M * 7.3 -M * Buck Pasture 9632 9.1 -M * 10.1 -M * EF Blacks Fork GS 9360 9.2 -M * 4.6 -M * Hams Fork 7840 8.0 9.6 83 7.8 9.4 83 Hewinta 9500 6.6 8.2 80 9.1 11.1 82 Hickerson Park 9122 5.9 6.1 97 5.3 7.8 68 Hole-in-Rock 9168 5.1 5.8 88 5.6 7.3 77 Indian Creek 9425 17.3 19.4 89 12.9 18.4 70 Kelley R.S. 8180 10.9 12.3 89 12.1 14.9 81 Spirit Lk 10235 6.1 -M * 7.6 -M * Steel Creek Park 10158 10.7 12.0 89 10.5 12.8 82 ----- ----- Basin Index (%) 88 77 UPPER BEAR RIVER Bear River RS 8777 7.2 -M * 8.5 -M * Bug Lake 7987 13.1 15.3 86 13.5 15.9 85 Burts Miller Ranch 8000 4.2 -M * 5.2 -M * Chalk Creek #1 9171 11.5 18.8 61 12.8 20.1 64 Hayden Fork 9130 9.8 12.4 79 12.4 16.8 74 Kelley R.S. 8180 10.9 12.3 89 12.1 14.9 81 Lily Lake 9133 7.1 10.6 67 9.0 13.6 66 Monte Cristo 8932 16.5 21.9 75 16.0 21.0 76 Salt River Summit 7640 9.0 10.8 83 10.5 13.8 76 ----- ----- Basin Index (%) 76 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.