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 4 , 2018 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 16.3 13.6 120 17.6 17.5 101 Black Bear 8170 37.3 30.1 124 34.7 31.6 110 Blind Bull Sum 8650 27.3 18.3 149 16.6 16.3 102 Cottonwood Creek 7670 18.0 17.4 103 19.7 19.9 99 East Rim Divide 7930 10.1 8.5 119 10.0 9.7 103 Grand Targhee 9260 38.7 30.6 126 25.1 25.2 100 Granite Creek 6770 15.5 14.0 111 17.3 16.8 103 Grassy Lake 7265 27.5 26.6 103 30.7 30.0 102 Gros Ventre Summit 8750 11.0 10.1 109 11.4 10.3 111 Gunsight Pass 9820 12.8 10.8 119 12.6 11.0 115 Lewis Lake Divide 7850 33.8 25.4 133 -M 29.4 * Phillips Bench 8200 21.4 20.0 107 22.2 23.2 96 Salt River Summit 7640 8.8 10.7 82 10.4 13.7 76 Snake River Station 6920 16.6 14.4 115 20.4 18.9 108 Spring Creek Divide 9000 21.4 19.0 113 20.4 19.6 104 Thumb Divide 7980 16.4 12.4 132 16.3 15.0 109 Togwotee Pass 9580 26.0 18.3 142 26.4 19.8 133 Two Ocean Plateau 9240 32.5 21.8 149 -M 22.1 * Willow Creek 8080 26.8 22.9 117 29.1 27.3 107 Younts Peak 8350 -M 11.8 * -M 12.9 * ----- ----- Basin Index (%) 121 105 MADISON-GALLATIN Black Bear 8170 37.3 30.1 124 34.7 31.6 110 Canyon 7870 15.3 10.8 142 17.2 13.3 129 Madison Plateau 7750 24.1 18.1 133 23.6 21.7 109 West Yellowstone 6700 12.5 9.1 137 15.2 11.9 128 Whiskey Creek 6800 14.5 12.2 119 16.6 16.6 100 ----- ----- Basin Index (%) 129 113 YELLOWSTONE Beartooth Lake 9360 34.8 17.3 201 30.6 16.0 191 Burnt Mtn 5880 6.5 4.1 159 12.4 9.7 128 Canyon 7870 15.3 10.8 142 17.2 13.3 129 Cole Creek 7850 11.9 10.4 114 7.9 9.3 85 Evening Star 9200 35.5 19.6 181 31.1 22.5 138 Fisher Creek 9100 45.8 26.1 175 39.9 26.0 153 Northeast Entrance 7350 13.0 8.4 155 15.9 10.0 159 Parker Peak 9400 29.3 16.2 181 22.8 14.3 159 Sylvan Lake 8420 21.4 16.1 133 22.9 18.3 125 Thumb Divide 7980 16.4 12.4 132 16.3 15.0 109 Two Ocean Plateau 9240 32.5 21.8 149 -M 22.1 * White Mill 8700 36.5 18.6 196 27.1 19.3 140 Wolverine 7650 19.3 8.6 224 18.5 10.1 183 ----- ----- Basin Index (%) 167 143 WIND RIVER Burroughs Creek 8750 14.0 -M * 16.0 -M * Castle Creek 8400 7.5 -M * 8.7 -M * Cold Springs 9630 8.0 5.6 143 8.6 7.6 113 Deer Park 9700 9.1 10.9 83 12.0 15.5 77 Hobbs Park 10100 13.9 10.0 139 11.9 9.7 123 Kirwin 9550 17.0 7.2 236 15.5 8.9 174 Little Warm 9370 13.2 8.2 161 13.7 10.0 137 Owl Creek 8975 3.4 4.0 85 5.2 4.4 118 South Pass 9040 9.2 11.8 78 -M 13.7 * St. Lawrence Alt 8620 3.0 5.4 56 7.1 6.6 108 Togwotee Pass 9580 26.0 18.3 142 26.4 19.8 133 Townsend Creek 8700 6.0 6.8 88 7.5 8.8 85 ----- ----- Basin Index (%) 123 118 BIGHORN BASIN Bald Mtn. 9380 17.3 15.2 114 12.3 13.3 92 Bear Trap Meadow 8200 7.9 4.5 176 8.5 6.3 135 Bone Springs Div 9350 15.5 12.5 124 11.7 12.0 98 Grave Springs 8550 5.4 7.1 76 4.5 8.0 56 Kirwin 9550 17.0 7.2 236 15.5 8.9 174 Marquette 8760 4.8 -M * 8.5 -M * Middle Powder 7760 6.9 8.3 83 -M 8.9 * Owl Creek 8975 3.4 4.0 85 5.2 4.4 118 Powder River Pass 9480 14.1 8.1 174 13.0 9.8 133 Shell Creek 9580 17.6 11.9 148 13.4 10.8 124 Timber Creek 7950 2.8 3.9 72 -M 5.4 * ----- ----- Basin Index (%) 130 114 SHOSHONE RIVER Blackwater 9780 29.6 17.7 167 27.3 16.4 166 Evening Star 9200 35.5 19.6 181 31.1 22.5 138 Marquette 8760 4.8 -M * 8.5 -M * Sylvan Road 7120 13.3 9.7 137 18.8 14.1 133 Younts Peak 8350 -M 11.8 * -M 12.9 * ----- ----- Basin Index (%) 167 146 POWDER RIVER Bear Trap Meadow 8200 7.9 4.5 176 8.5 6.3 135 Cloud Peak Reservoir 9860 12.9 10.6 122 11.5 9.8 117 Grave Springs 8550 5.4 7.1 76 4.5 8.0 56 Hansen Sawmill 8360 6.7 4.7 143 8.0 6.2 129 Middle Powder 7760 6.9 8.3 83 -M 8.9 * Powder River Pass 9480 14.1 8.1 174 13.0 9.8 133 Soldier Park 8720 5.5 -M * 7.9 -M * ----- ----- Basin Index (%) 124 113 TONGUE RIVER Big Goose 7990 6.1 6.3 97 6.6 8.0 82 Bone Springs Div 9350 15.5 12.5 124 11.7 12.0 98 Burgess Junction 7880 7.5 8.6 87 6.9 9.2 75 Dome Lake 8880 11.9 8.8 135 9.5 10.1 94 Little Goose 8870 7.3 -M * 9.5 -M * Sucker Creek 8880 8.3 9.2 90 6.5 10.8 60 Tie Creek 6870 3.5 4.4 80 7.0 8.6 81 ----- ----- Basin Index (%) 106 82 BELLE FOURCHE Cole Canyon 5910 5.6 4.9 114 7.5 7.2 104 ----- ----- Basin Index (%) 114 104 CHEYENNE RIVER BASIN Blind Park 6890 6.9 6.4 108 9.4 9.6 98 North Rapid Creek 6130 6.5 6.0 108 6.9 7.7 90 ----- ----- Basin Index (%) 108 94 UPPER N. PLATTE Arapaho Ridge 10960 16.1 17.0 95 15.8 18.0 88 Blackhall Mtn 9820 22.5 -M * 21.9 -M * Columbine 9160 18.5 20.2 92 19.2 20.6 93 Divide Peak 8880 11.2 16.3 69 14.7 17.0 86 Joe Wright 10120 13.4 17.1 78 22.1 20.2 109 Laprele Creek 8375 5.5 7.8 71 7.0 9.5 74 Med Bow 10500 32.9 -M * 27.5 -M * North French Creek 10130 22.1 21.3 104 21.7 21.3 102 Never Summer 10280 14.5 16.3 89 11.6 -M * Old Battle 10000 20.8 24.3 86 20.2 28.3 71 Rawah 9020 8.9 8.9 100 12.2 11.1 110 Sage Creek Basin 7850 7.7 10.7 72 8.3 11.9 70 Sand Lake 10050 21.5 21.4 100 18.0 19.1 94 South Brush Creek 8440 8.4 10.6 79 9.6 11.9 81 Tower 10500 27.1 36.9 73 25.4 32.4 78 Webber Springs 9250 15.6 19.0 82 18.0 21.4 84 Willow Creek Pass 9540 10.6 9.7 109 11.3 10.5 108 Zirkel 9340 22.1 23.6 94 25.8 23.6 109 ----- ----- Basin Index (%) 87 90 SWEETWATER Deer Park 9700 9.1 10.9 83 12.0 15.5 77 Larsen Creek 9000 9.1 9.8 93 9.3 -M * South Pass 9040 9.2 11.8 78 -M 13.7 * ----- ----- Basin Index (%) 84 77* LOWER N. PLATTE Casper Mtn. 7900 6.3 10.6 59 5.4 11.3 48 Laprele Creek 8375 5.5 7.8 71 7.0 9.5 74 Reno Hill 8400 7.8 10.5 74 8.9 11.3 79 Windy Peak 7900 5.1 5.9 86 6.7 7.9 85 ----- ----- Basin Index (%) 71 70 LARAMIE RIVER Brooklyn Lake 10240 19.9 15.5 128 20.4 16.3 125 Cinnabar Park 9574 18.6 17.4 107 21.0 19.8 106 Crow Creek 8330 2.5 6.8 37 8.2 7.9 104 Deadman Hill 10220 16.0 12.6 127 15.2 13.0 117 Rawah 9020 8.9 8.9 100 12.2 11.1 110 Roach 9700 11.4 12.6 90 14.3 14.9 96 ----- ----- Basin Index (%) 105 110 S. PLATTE Black Mountain 8920 7.5 -M * 10.2 -M * Crow Creek 8330 2.5 6.8 37 8.2 7.9 104 Deadman Hill 10220 16.0 12.6 127 15.2 13.0 117 ----- ----- Basin Index (%) 95 112 LITTLE SNAKE RIVER Battle Mountain 7440 5.4 10.0 54 8.1 12.3 66 Divide Peak 8880 11.2 16.3 69 14.7 17.0 86 Elk River 8700 12.4 16.0 78 13.2 16.2 81 Little Snake River 8915 17.7 19.9 89 22.8 25.2 90 Old Battle 10000 20.8 24.3 86 20.2 28.3 71 Sage Creek Basin 7850 7.7 10.7 72 8.3 11.9 70 Sandstone RS 8150 7.1 10.9 65 7.0 15.3 46 Whiskey Park 8950 19.2 22.0 87 20.7 22.7 91 ----- ----- Basin Index (%) 78 77 UPPER GREEN RIVER Big Sandy Opening 9080 10.3 10.3 100 10.3 10.7 96 Blind Bull Sum 8650 27.3 18.3 149 16.6 16.3 102 East Rim Divide 7930 10.1 8.5 119 10.0 9.7 103 Elkhart Park G.S. 9400 10.0 9.6 104 9.6 10.7 90 Gros Ventre Summit 8750 11.0 10.1 109 11.4 10.3 111 Gunsight Pass 9820 12.8 10.8 119 12.6 11.0 115 Kendall R.S. 7740 12.6 9.9 127 13.0 11.9 109 Loomis Park 8240 14.4 12.0 120 15.2 14.3 106 New Fork Lake 8340 9.9 8.4 118 9.3 8.9 104 Pocket Creek 9360 7.0 -M * 6.8 -M * Snider Basin 8060 10.9 10.0 109 12.7 11.7 109 Spring Creek Divide 9000 21.4 19.0 113 20.4 19.6 104 Triple Peak 8500 23.8 17.4 137 25.7 20.6 125 ----- ----- Basin Index (%) 121 107 LOWER GREEN RIVER Blacks Fork Jct 8869 5.9 -M * 7.1 -M * Buck Pasture 9632 8.9 -M * 9.7 -M * EF Blacks Fork GS 9360 9.1 -M * 4.0 -M * Hams Fork 7840 7.7 9.5 81 7.6 9.3 82 Hewinta 9500 6.2 8.1 77 8.9 11.0 81 Hickerson Park 9122 5.9 6.1 97 5.5 7.7 71 Hole-in-Rock 9168 5.1 5.7 89 5.7 7.2 79 Indian Creek 9425 17.0 19.2 89 12.5 18.2 69 Kelley R.S. 8180 10.5 12.2 86 11.7 14.8 79 Spirit Lk 10235 6.1 -M * 7.6 -M * Steel Creek Park 10158 9.9 11.8 84 10.5 12.6 83 ----- ----- Basin Index (%) 86 77 UPPER BEAR RIVER Bear River RS 8777 6.9 -M * 8.4 -M * Bug Lake 7987 12.8 15.2 84 13.1 15.8 83 Burts Miller Ranch 8000 4.0 -M * 5.2 -M * Chalk Creek #1 9171 11.0 18.7 59 12.3 19.9 62 Hayden Fork 9130 9.4 12.4 76 12.0 16.7 72 Kelley R.S. 8180 10.5 12.2 86 11.7 14.8 79 Lily Lake 9133 7.0 10.6 66 8.9 13.5 66 Monte Cristo 8932 15.9 21.7 73 15.8 20.9 76 Salt River Summit 7640 8.8 10.7 82 10.4 13.7 76 ----- ----- 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.