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 THURSDAY: MARCH 1 , 2018 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 15.5 13.5 115 17.0 17.2 99 Black Bear 8170 35.8 29.6 121 33.6 30.8 109 Blind Bull Sum 8650 26.4 17.9 147 15.8 16.0 99 Cottonwood Creek 7670 17.5 16.9 104 19.2 19.6 98 East Rim Divide 7930 9.8 8.1 121 9.7 9.6 101 Grand Targhee 9260 36.7 30.2 122 23.9 24.8 96 Granite Creek 6770 14.8 13.8 107 16.9 16.5 102 Grassy Lake 7265 26.1 26.2 100 29.1 29.4 99 Gros Ventre Summit 8750 10.4 9.7 107 10.8 10.1 107 Gunsight Pass 9820 12.4 10.6 117 12.2 10.9 112 Lewis Lake Divide 7850 32.0 25.2 127 28.0 28.7 98 Phillips Bench 8200 19.7 19.7 100 20.9 22.7 92 Salt River Summit 7640 8.1 10.6 76 9.9 13.4 74 Snake River Station 6920 15.6 14.2 110 19.9 18.7 106 Spring Creek Divide 9000 21.0 18.6 113 19.8 19.3 103 Thumb Divide 7980 15.2 12.3 124 15.4 14.6 105 Togwotee Pass 9580 24.9 17.7 141 25.5 19.4 131 Two Ocean Plateau 9240 31.5 21.6 146 20.3 21.6 94 Willow Creek 8080 26.0 22.2 117 28.1 26.8 105 Younts Peak 8350 -M 11.7 * -M 12.6 * ----- ----- Basin Index (%) 118 102 MADISON-GALLATIN Black Bear 8170 35.8 29.6 121 33.6 30.8 109 Canyon 7870 14.8 10.5 141 16.6 13.0 128 Madison Plateau 7750 22.9 17.8 129 22.4 21.2 106 West Yellowstone 6700 11.7 9.0 130 14.6 11.7 125 Whiskey Creek 6800 13.6 12.0 113 15.8 16.3 97 ----- ----- Basin Index (%) 125 111 YELLOWSTONE Beartooth Lake 9360 34.3 16.7 205 28.9 15.7 184 Burnt Mtn 5880 6.4 4.0 160 12.5 9.5 132 Canyon 7870 14.8 10.5 141 16.6 13.0 128 Cole Creek 7850 11.4 9.9 115 7.7 9.1 85 Evening Star 9200 34.7 19.1 182 31.0 22.1 140 Fisher Creek 9100 44.9 25.8 174 39.1 25.5 153 Northeast Entrance 7350 12.6 8.2 154 15.5 9.9 157 Parker Peak 9400 28.3 16.0 177 22.6 14.0 161 Sylvan Lake 8420 20.5 15.9 129 21.9 18.0 122 Thumb Divide 7980 15.2 12.3 124 15.4 14.6 105 Two Ocean Plateau 9240 31.5 21.6 146 20.3 21.6 94 White Mill 8700 35.8 18.3 196 26.6 18.9 141 Wolverine 7650 18.8 8.5 221 18.0 10.0 180 ----- ----- Basin Index (%) 166 137 WIND RIVER Burroughs Creek 8750 13.8 -M * 15.7 -M * Castle Creek 8400 7.4 -M * 8.5 -M * Cold Springs 9630 7.6 5.5 138 8.3 7.5 111 Deer Park 9700 9.1 10.8 84 11.7 15.3 76 Hobbs Park 10100 13.4 9.7 138 11.6 9.5 122 Kirwin 9550 16.4 7.0 234 14.8 8.8 168 Little Warm 9370 12.8 7.9 162 13.4 9.8 137 Owl Creek 8975 3.3 3.9 85 5.1 4.3 119 South Pass 9040 9.1 11.4 80 -M 13.5 * St. Lawrence Alt 8620 2.7 5.2 52 6.9 6.5 106 Togwotee Pass 9580 24.9 17.7 141 25.5 19.4 131 Townsend Creek 8700 5.8 6.5 89 6.9 8.6 80 ----- ----- Basin Index (%) 123 116 BIGHORN BASIN Bald Mtn. 9380 17.3 14.7 118 12.1 13.1 92 Bear Trap Meadow 8200 7.7 4.4 175 8.5 6.1 139 Bone Springs Div 9350 15.5 12.0 129 11.4 11.7 97 Grave Springs 8550 5.3 6.9 77 4.4 7.9 56 Kirwin 9550 16.4 7.0 234 14.8 8.8 168 Marquette 8760 4.3 -M * 8.0 -M * Middle Powder 7760 6.9 8.0 86 -M 8.7 * Owl Creek 8975 3.3 3.9 85 5.1 4.3 119 Powder River Pass 9480 14.1 8.0 176 12.8 9.6 133 Shell Creek 9580 17.4 11.6 150 13.3 10.7 124 Timber Creek 7950 2.6 3.7 70 -M 5.3 * ----- ----- Basin Index (%) 133 114 SHOSHONE RIVER Blackwater 9780 28.6 17.2 166 26.7 16.1 166 Evening Star 9200 34.7 19.1 182 31.0 22.1 140 Marquette 8760 4.3 -M * 8.0 -M * Sylvan Road 7120 12.7 9.4 135 18.2 13.9 131 Younts Peak 8350 -M 11.7 * -M 12.6 * ----- ----- Basin Index (%) 166 146 POWDER RIVER Bear Trap Meadow 8200 7.7 4.4 175 8.5 6.1 139 Cloud Peak Reservoir 9860 12.6 10.4 121 10.9 9.6 114 Grave Springs 8550 5.3 6.9 77 4.4 7.9 56 Hansen Sawmill 8360 6.6 4.7 140 7.9 6.1 130 Middle Powder 7760 6.9 8.0 86 -M 8.7 * Powder River Pass 9480 14.1 8.0 176 12.8 9.6 133 Soldier Park 8720 5.2 -M * 7.4 -M * ----- ----- Basin Index (%) 125 113 TONGUE RIVER Big Goose 7990 6.0 6.2 97 6.5 7.9 82 Bone Springs Div 9350 15.5 12.0 129 11.4 11.7 97 Burgess Junction 7880 7.4 8.3 89 6.6 9.0 73 Dome Lake 8880 11.9 8.7 137 9.3 10.0 93 Little Goose 8870 7.3 -M * 9.3 -M * Sucker Creek 8880 8.2 8.9 92 6.2 10.6 58 Tie Creek 6870 3.4 4.3 79 6.8 8.4 81 ----- ----- Basin Index (%) 108 81 BELLE FOURCHE Cole Canyon 5910 5.4 5.0 108 7.5 7.1 106 ----- ----- Basin Index (%) 108 106 CHEYENNE RIVER BASIN Blind Park 6890 6.7 6.4 105 9.2 9.4 98 North Rapid Creek 6130 6.3 5.9 107 6.7 7.6 88 ----- ----- Basin Index (%) 106 94 UPPER N. PLATTE Arapaho Ridge 10960 16.0 16.7 96 15.7 17.7 89 Blackhall Mtn 9820 22.1 -M * 21.8 -M * Columbine 9160 18.2 19.8 92 17.5 20.3 86 Divide Peak 8880 10.9 15.8 69 14.6 16.8 87 Joe Wright 10120 13.3 16.6 80 22.1 19.9 111 Laprele Creek 8375 5.3 7.8 68 6.8 9.3 73 Med Bow 10500 32.8 -M * 27.1 -M * North French Creek 10130 21.9 21.1 104 21.7 21.1 103 Never Summer 10280 14.4 16.2 89 11.6 -M * Old Battle 10000 20.6 23.9 86 19.8 27.9 71 Rawah 9020 9.0 8.8 102 12.2 10.9 112 Sage Creek Basin 7850 7.4 10.6 70 8.2 11.7 70 Sand Lake 10050 21.1 21.2 100 17.8 18.9 94 South Brush Creek 8440 8.0 10.3 78 9.5 11.7 81 Tower 10500 27.1 36.3 75 24.7 31.8 78 Webber Springs 9250 15.3 18.7 82 17.9 21.1 85 Willow Creek Pass 9540 10.6 9.5 112 11.2 10.4 108 Zirkel 9340 21.4 23.0 93 25.8 23.4 110 ----- ----- Basin Index (%) 87 90 SWEETWATER Deer Park 9700 9.1 10.8 84 11.7 15.3 76 Larsen Creek 9000 9.0 9.5 95 9.2 -M * South Pass 9040 9.1 11.4 80 -M 13.5 * ----- ----- Basin Index (%) 86 76* LOWER N. PLATTE Casper Mtn. 7900 6.3 10.2 62 5.1 11.1 46 Laprele Creek 8375 5.3 7.8 68 6.8 9.3 73 Reno Hill 8400 7.5 10.0 75 8.6 11.1 77 Windy Peak 7900 5.0 5.7 88 6.4 7.8 82 ----- ----- Basin Index (%) 72 68 LARAMIE RIVER Brooklyn Lake 10240 19.7 15.0 131 20.3 16.0 127 Cinnabar Park 9574 18.3 17.1 107 20.6 19.7 105 Crow Creek 8330 -M 6.7 * 8.2 7.8 105 Deadman Hill 10220 15.9 12.4 128 15.3 12.7 120 Rawah 9020 9.0 8.8 102 12.2 10.9 112 Roach 9700 11.3 12.4 91 14.3 14.7 97 ----- ----- Basin Index (%) 113 111 S. PLATTE Black Mountain 8920 7.4 -M * 10.1 -M * Crow Creek 8330 -M 6.7 * 8.2 7.8 105 Deadman Hill 10220 15.9 12.4 128 15.3 12.7 120 ----- ----- Basin Index (%) 128* 115 LITTLE SNAKE RIVER Battle Mountain 7440 5.4 9.9 55 -M 12.1 * Divide Peak 8880 10.9 15.8 69 14.6 16.8 87 Elk River 8700 12.2 15.5 79 13.3 15.9 84 Little Snake River 8915 17.3 19.7 88 22.7 24.9 91 Old Battle 10000 20.6 23.9 86 19.8 27.9 71 Sage Creek Basin 7850 7.4 10.6 70 8.2 11.7 70 Sandstone RS 8150 7.3 10.4 70 6.8 15.0 45 Whiskey Park 8950 18.8 21.5 87 20.7 22.4 92 ----- ----- Basin Index (%) 78 79 UPPER GREEN RIVER Big Sandy Opening 9080 10.1 10.1 100 10.0 10.5 95 Blind Bull Sum 8650 26.4 17.9 147 15.8 16.0 99 East Rim Divide 7930 9.8 8.1 121 9.7 9.6 101 Elkhart Park G.S. 9400 9.7 9.4 103 9.3 10.5 89 Gros Ventre Summit 8750 10.4 9.7 107 10.8 10.1 107 Gunsight Pass 9820 12.4 10.6 117 12.2 10.9 112 Kendall R.S. 7740 12.4 9.7 128 12.9 11.7 110 Loomis Park 8240 14.1 11.7 121 14.9 14.0 106 New Fork Lake 8340 9.7 8.2 118 8.9 8.8 101 Pocket Creek 9360 6.8 -M * 6.6 -M * Snider Basin 8060 10.4 9.6 108 12.2 11.5 106 Spring Creek Divide 9000 21.0 18.6 113 19.8 19.3 103 Triple Peak 8500 23.2 16.8 138 25.1 20.2 124 ----- ----- Basin Index (%) 121 106 LOWER GREEN RIVER Blacks Fork Jct 8869 5.7 -M * 7.1 -M * Buck Pasture 9632 8.5 -M * 9.8 -M * EF Blacks Fork GS 9360 7.0 -M * 4.6 -M * Hams Fork 7840 7.4 9.2 80 7.3 9.1 80 Hewinta 9500 6.1 7.9 77 8.7 10.8 81 Hickerson Park 9122 5.8 5.9 98 5.1 7.6 67 Hole-in-Rock 9168 4.9 5.6 88 5.5 7.1 77 Indian Creek 9425 16.5 19.0 87 12.1 17.8 68 Kelley R.S. 8180 9.9 12.1 82 11.4 14.6 78 Spirit Lk 10235 6.4 -M * 7.4 -M * Steel Creek Park 10158 10.0 11.5 87 10.5 12.4 85 ----- ----- Basin Index (%) 85 76 UPPER BEAR RIVER Bear River RS 8777 6.9 -M * 8.3 -M * Bug Lake 7987 12.4 14.8 84 12.8 15.5 83 Burts Miller Ranch 8000 4.0 -M * 5.1 -M * Chalk Creek #1 9171 11.0 18.3 60 12.2 19.4 63 Hayden Fork 9130 9.4 12.1 78 11.9 16.4 73 Kelley R.S. 8180 9.9 12.1 82 11.4 14.6 78 Lily Lake 9133 8.1 10.3 79 8.8 13.2 67 Monte Cristo 8932 15.6 21.0 74 15.5 20.5 76 Salt River Summit 7640 8.1 10.6 76 9.9 13.4 74 ----- ----- Basin Index (%) 75 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.