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 TUESDAY: JANUARY 16 , 2018 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 10.6 9.6 110 12.3 12.1 102 Black Bear 8170 -M 20.7 * -M 21.4 * Blind Bull Sum 8650 17.2 12.2 141 10.8 11.2 96 Cottonwood Creek 7670 11.6 10.4 112 13.3 13.8 96 East Rim Divide 7930 6.1 5.6 109 6.6 6.7 99 Grand Targhee 9260 28.4 21.2 134 16.9 18.0 94 Granite Creek 6770 9.2 8.6 107 12.2 11.7 104 Grassy Lake 7265 14.6 16.5 88 18.3 20.7 88 Gros Ventre Summit 8750 9.4 7.4 127 8.8 7.2 122 Gunsight Pass 9820 8.9 7.3 122 9.3 7.7 121 Lewis Lake Divide 7850 17.3 16.5 105 20.1 20.1 100 Phillips Bench 8200 12.8 14.7 87 14.3 15.8 91 Salt River Summit 7640 4.8 6.3 76 6.9 9.2 75 Snake River Station 6920 9.0 9.0 100 13.3 13.4 99 Spring Creek Divide 9000 13.2 12.0 110 13.2 13.4 99 Thumb Divide 7980 10.2 7.9 129 11.3 10.7 106 Togwotee Pass 9580 18.2 13.0 140 18.4 13.9 132 Two Ocean Plateau 9240 22.5 15.5 145 16.6 15.3 108 Willow Creek 8080 16.6 14.0 119 19.3 18.8 103 Younts Peak 8350 -M 8.4 * -M 9.2 * ----- ----- Basin Index (%) 116 101 MADISON-GALLATIN Black Bear 8170 -M 20.7 * -M 21.4 * Canyon 7870 9.1 7.2 126 10.7 9.3 115 Madison Plateau 7750 12.7 12.2 104 13.9 15.1 92 West Yellowstone 6700 6.4 6.2 103 9.2 8.3 111 Whiskey Creek 6800 7.4 8.3 89 9.6 11.6 83 ----- ----- Basin Index (%) 105 98 YELLOWSTONE Beartooth Lake 9360 21.4 12.4 173 19.6 11.1 177 Burnt Mtn 5880 3.0 2.1 143 8.3 7.4 112 Canyon 7870 9.1 7.2 126 10.7 9.3 115 Cole Creek 7850 8.2 7.2 114 5.6 7.0 80 Evening Star 9200 23.0 14.0 164 24.6 15.7 157 Fisher Creek 9100 29.3 18.2 161 25.1 18.0 139 Northeast Entrance 7350 6.3 5.3 119 9.7 7.3 133 Parker Peak 9400 19.4 11.5 169 -M 10.0 * Sylvan Lake 8420 14.1 11.2 126 15.2 13.1 116 Thumb Divide 7980 10.2 7.9 129 11.3 10.7 106 Two Ocean Plateau 9240 22.5 15.5 145 16.6 15.3 108 White Mill 8700 22.4 12.6 178 16.4 13.5 121 Wolverine 7650 9.9 5.9 168 12.2 7.3 167 ----- ----- Basin Index (%) 152 129 WIND RIVER Burroughs Creek 8750 9.0 -M * 10.5 -M * Castle Creek 8400 5.0 -M * 6.3 -M * Cold Springs 9630 5.5 4.0 138 6.0 5.7 105 Deer Park 9700 7.3 7.2 101 8.6 10.8 80 Hobbs Park 10100 10.2 7.3 140 8.5 7.0 121 Kirwin 9550 11.7 5.3 221 10.4 6.6 158 Little Warm 9370 -M 5.6 * 9.8 7.2 136 Owl Creek 8975 2.5 2.9 86 4.1 3.2 128 South Pass 9040 6.8 7.7 88 4.7 9.7 48 St. Lawrence Alt 8620 2.2 3.5 63 5.5 4.8 115 Togwotee Pass 9580 18.2 13.0 140 18.4 13.9 132 Townsend Creek 8700 4.1 4.4 93 5.1 6.5 78 ----- ----- Basin Index (%) 124 108 BIGHORN BASIN Bald Mtn. 9380 11.6 9.9 117 7.7 9.5 81 Bear Trap Meadow 8200 4.0 2.9 138 5.3 4.6 115 Bone Springs Div 9350 9.7 8.6 113 7.1 8.4 85 Grave Springs 8550 3.5 4.4 80 3.0 5.8 52 Kirwin 9550 11.7 5.3 221 10.4 6.6 158 Marquette 8760 3.5 -M * 6.6 -M * Middle Powder 7760 4.8 6.0 80 3.3 6.7 49 Owl Creek 8975 2.5 2.9 86 4.1 3.2 128 Powder River Pass 9480 8.6 5.8 148 7.1 7.0 101 Shell Creek 9580 11.5 8.3 139 8.0 7.7 104 Timber Creek 7950 2.0 2.5 80 1.6 4.2 38 ----- ----- Basin Index (%) 123 90 SHOSHONE RIVER Blackwater 9780 20.8 12.9 161 18.3 11.7 156 Evening Star 9200 23.0 14.0 164 24.6 15.7 157 Marquette 8760 3.5 -M * 6.6 -M * Sylvan Road 7120 7.8 6.6 118 12.2 10.6 115 Younts Peak 8350 -M 8.4 * -M 9.2 * ----- ----- Basin Index (%) 154 145 POWDER RIVER Bear Trap Meadow 8200 4.0 2.9 138 5.3 4.6 115 Cloud Peak Reservoir 9860 7.9 7.2 110 7.1 7.1 100 Grave Springs 8550 3.5 4.4 80 3.0 5.8 52 Hansen Sawmill 8360 3.6 3.5 103 5.0 4.5 111 Middle Powder 7760 4.8 6.0 80 3.3 6.7 49 Powder River Pass 9480 8.6 5.8 148 7.1 7.0 101 Soldier Park 8720 2.5 -M * 5.3 -M * ----- ----- Basin Index (%) 109 86 TONGUE RIVER Big Goose 7990 3.4 4.3 79 4.0 5.9 68 Bone Springs Div 9350 9.7 8.6 113 7.1 8.4 85 Burgess Junction 7880 4.3 5.8 74 3.8 6.7 57 Dome Lake 8880 5.8 6.1 95 5.6 7.5 75 Little Goose 8870 4.3 -M * 6.2 -M * Sucker Creek 8880 4.8 6.3 76 -M 7.7 * Tie Creek 6870 1.7 2.7 63 5.0 6.4 78 ----- ----- Basin Index (%) 88 73 BELLE FOURCHE Cole Canyon 5910 3.2 2.7 119 5.0 5.1 98 ----- ----- Basin Index (%) 119 98 CHEYENNE RIVER BASIN Blind Park 6890 3.8 4.0 95 6.1 7.0 87 North Rapid Creek 6130 4.0 3.7 108 4.4 5.7 77 ----- ----- Basin Index (%) 101 83 UPPER N. PLATTE Arapaho Ridge 10960 10.3 11.2 92 10.1 12.8 79 Blackhall Mtn 9820 13.8 -M * 14.1 -M * Columbine 9160 5.3 12.4 43 -M 14.1 * Divide Peak 8880 7.0 10.4 67 10.7 12.0 89 Joe Wright 10120 8.6 11.2 77 15.6 14.1 111 Laprele Creek 8375 3.2 4.9 65 4.6 6.7 69 Med Bow 10500 22.0 -M * 18.8 -M * North French Creek 10130 15.5 13.9 112 15.9 14.6 109 Never Summer 10280 9.0 10.5 86 7.8 -M * Old Battle 10000 12.6 15.6 81 12.0 19.5 62 Rawah 9020 5.9 5.4 109 8.6 8.4 102 Sage Creek Basin 7850 4.6 7.3 63 6.4 8.7 74 Sand Lake 10050 14.4 14.4 100 11.9 13.2 90 South Brush Creek 8440 5.7 6.1 93 7.0 8.5 82 Tower 10500 16.2 22.6 72 16.8 22.1 76 Webber Springs 9250 8.8 11.9 74 10.0 14.8 68 Willow Creek Pass 9540 7.1 6.2 115 7.5 7.4 101 Zirkel 9340 10.6 15.8 67 15.7 16.6 95 ----- ----- Basin Index (%) 81 85 SWEETWATER Deer Park 9700 7.3 7.2 101 8.6 10.8 80 Larsen Creek 9000 4.2 6.1 69 7.0 -M * South Pass 9040 6.8 7.7 88 4.7 9.7 48 ----- ----- Basin Index (%) 87 65 LOWER N. PLATTE Casper Mtn. 7900 4.4 6.7 66 -M 8.2 * Laprele Creek 8375 3.2 4.9 65 4.6 6.7 69 Reno Hill 8400 5.1 6.6 77 6.4 8.0 80 Windy Peak 7900 2.4 3.6 67 4.0 5.8 69 ----- ----- Basin Index (%) 69 73 LARAMIE RIVER Brooklyn Lake 10240 12.8 10.7 120 13.7 11.1 123 Cinnabar Park 9574 13.0 11.7 111 15.5 14.2 109 Crow Creek 8330 1.4 5.0 28 6.9 6.0 115 Deadman Hill 10220 10.5 8.2 128 10.5 9.0 117 Rawah 9020 5.9 5.4 109 8.6 8.4 102 Roach 9700 7.6 8.7 87 9.7 10.4 93 ----- ----- Basin Index (%) 103 110 S. PLATTE Black Mountain 8920 4.5 -M * 7.1 -M * Crow Creek 8330 1.4 5.0 28 6.9 6.0 115 Deadman Hill 10220 10.5 8.2 128 10.5 9.0 117 ----- ----- Basin Index (%) 90 116 LITTLE SNAKE RIVER Battle Mountain 7440 2.7 5.6 48 -M 8.5 * Divide Peak 8880 7.0 10.4 67 10.7 12.0 89 Elk River 8700 7.4 9.2 80 9.0 11.1 81 Little Snake River 8915 9.2 12.3 75 14.6 17.8 82 Old Battle 10000 12.6 15.6 81 12.0 19.5 62 Sage Creek Basin 7850 4.6 7.3 63 6.4 8.7 74 Sandstone RS 8150 4.5 6.7 67 4.5 10.4 43 Whiskey Park 8950 10.5 13.2 80 13.1 15.1 87 ----- ----- Basin Index (%) 73 74 UPPER GREEN RIVER Big Sandy Opening 9080 7.6 7.0 109 7.8 7.4 105 Blind Bull Sum 8650 17.2 12.2 141 10.8 11.2 96 East Rim Divide 7930 6.1 5.6 109 6.6 6.7 99 Elkhart Park G.S. 9400 6.8 6.4 106 6.9 7.5 92 Gros Ventre Summit 8750 9.4 7.4 127 8.8 7.2 122 Gunsight Pass 9820 8.9 7.3 122 9.3 7.7 121 Kendall R.S. 7740 8.5 6.5 131 9.3 8.0 116 Loomis Park 8240 9.1 7.8 117 9.8 9.8 100 New Fork Lake 8340 6.7 5.6 120 6.0 6.2 97 Pocket Creek 9360 6.1 -M * 5.3 -M * Snider Basin 8060 6.3 6.4 98 8.2 8.0 102 Spring Creek Divide 9000 13.2 12.0 110 13.2 13.4 99 Triple Peak 8500 13.9 11.4 122 15.8 13.8 114 ----- ----- Basin Index (%) 119 105 LOWER GREEN RIVER Blacks Fork Jct 8869 3.5 -M * 4.8 -M * Buck Pasture 9632 6.0 -M * 6.8 -M * EF Blacks Fork GS 9360 3.2 -M * 4.2 -M * Hams Fork 7840 4.4 5.7 77 5.1 6.4 80 Hewinta 9500 3.5 4.9 71 5.8 7.5 77 Hickerson Park 9122 3.2 3.2 100 3.2 5.5 58 Hole-in-Rock 9168 2.7 3.4 79 3.3 5.2 63 Indian Creek 9425 11.0 12.2 90 8.4 12.1 69 Kelley R.S. 8180 6.6 7.4 89 7.7 10.1 76 Spirit Lk 10235 3.6 -M * 4.2 -M * Steel Creek Park 10158 7.1 7.3 97 7.1 8.7 82 ----- ----- Basin Index (%) 87 73 UPPER BEAR RIVER Bear River RS 8777 4.0 -M * 5.5 -M * Bug Lake 7987 6.8 8.6 79 8.8 10.8 81 Burts Miller Ranch 8000 2.4 -M * 3.3 -M * Chalk Creek #1 9171 7.3 11.6 63 8.3 13.7 61 Hayden Fork 9130 6.2 7.1 87 8.0 11.4 70 Kelley R.S. 8180 6.6 7.4 89 7.7 10.1 76 Lily Lake 9133 5.4 6.5 83 5.8 9.4 62 Monte Cristo 8932 10.6 13.6 78 10.6 14.3 74 Salt River Summit 7640 4.8 6.3 76 6.9 9.2 75 ----- ----- Basin Index (%) 78 71 ----------------------------------------------------------------------------- -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.