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: JANUARY 22 , 2018 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 10.9 10.1 108 12.5 12.7 98 Black Bear 8170 24.6 22.1 111 23.7 22.7 104 Blind Bull Sum 8650 17.3 12.8 135 11.0 11.8 93 Cottonwood Creek 7670 12.3 11.4 108 14.0 14.5 97 East Rim Divide 7930 6.2 6.2 100 6.6 7.1 93 Grand Targhee 9260 29.4 21.7 135 17.4 18.5 94 Granite Creek 6770 9.2 9.2 100 12.2 12.4 98 Grassy Lake 7265 15.9 17.8 89 19.3 21.8 89 Gros Ventre Summit 8750 9.4 7.8 121 8.8 7.6 116 Gunsight Pass 9820 9.0 7.8 115 9.4 8.2 115 Lewis Lake Divide 7850 18.4 17.6 105 21.2 21.2 100 Phillips Bench 8200 12.8 15.6 82 14.6 16.6 88 Salt River Summit 7640 5.3 7.1 75 7.2 9.8 73 Snake River Station 6920 9.8 9.4 104 13.9 14.1 99 Spring Creek Divide 9000 13.9 12.7 109 13.8 14.2 97 Thumb Divide 7980 10.9 8.5 128 12.0 11.2 107 Togwotee Pass 9580 18.5 13.3 139 18.8 14.6 129 Two Ocean Plateau 9240 23.5 15.8 149 17.6 16.0 110 Willow Creek 8080 17.5 15.4 114 20.5 19.8 104 Younts Peak 8350 -M 8.8 * -M 9.7 * ----- ----- Basin Index (%) 113 100 MADISON-GALLATIN Black Bear 8170 24.6 22.1 111 23.7 22.7 104 Canyon 7870 10.4 7.6 137 12.0 9.9 121 Madison Plateau 7750 14.9 13.4 111 16.0 15.9 101 West Yellowstone 6700 7.7 6.6 117 10.5 8.8 119 Whiskey Creek 6800 8.9 8.9 100 10.9 12.2 89 ----- ----- Basin Index (%) 113 105 YELLOWSTONE Beartooth Lake 9360 22.8 12.8 178 20.8 11.7 178 Burnt Mtn 5880 3.6 2.3 157 8.8 7.5 117 Canyon 7870 10.4 7.6 137 12.0 9.9 121 Cole Creek 7850 9.3 7.6 122 6.0 7.2 83 Evening Star 9200 23.8 14.5 164 25.3 16.5 153 Fisher Creek 9100 30.7 19.3 159 26.4 19.0 139 Northeast Entrance 7350 7.0 5.8 121 10.3 7.6 136 Parker Peak 9400 20.6 12.1 170 17.9 10.5 170 Sylvan Lake 8420 14.9 11.8 126 16.2 13.7 118 Thumb Divide 7980 10.9 8.5 128 12.0 11.2 107 Two Ocean Plateau 9240 23.5 15.8 149 17.6 16.0 110 White Mill 8700 23.7 13.5 176 17.1 14.1 121 Wolverine 7650 10.6 6.3 168 13.0 7.6 171 ----- ----- Basin Index (%) 154 133 WIND RIVER Burroughs Creek 8750 9.2 -M * 10.5 -M * Castle Creek 8400 5.1 -M * 6.4 -M * Cold Springs 9630 5.8 4.2 138 6.1 5.8 105 Deer Park 9700 7.6 8.0 95 8.8 11.5 77 Hobbs Park 10100 10.7 7.6 141 9.0 7.3 123 Kirwin 9550 11.9 5.4 220 10.4 6.8 153 Little Warm 9370 10.0 5.8 172 10.1 7.6 133 Owl Creek 8975 2.7 3.0 90 4.2 3.3 127 South Pass 9040 7.1 8.1 88 4.9 10.1 49 St. Lawrence Alt 8620 2.5 3.7 68 5.9 5.0 118 Togwotee Pass 9580 18.5 13.3 139 18.8 14.6 129 Townsend Creek 8700 4.5 4.6 98 5.5 6.7 82 ----- ----- Basin Index (%) 128 106 BIGHORN BASIN Bald Mtn. 9380 11.8 10.1 117 7.9 9.9 80 Bear Trap Meadow 8200 4.7 3.1 152 5.9 4.9 120 Bone Springs Div 9350 10.0 9.2 109 7.4 8.9 83 Grave Springs 8550 4.2 4.6 91 3.4 6.0 57 Kirwin 9550 11.9 5.4 220 10.4 6.8 153 Marquette 8760 3.6 -M * 6.7 -M * Middle Powder 7760 5.3 6.0 88 3.6 6.9 52 Owl Creek 8975 2.7 3.0 90 4.2 3.3 127 Powder River Pass 9480 9.1 5.9 154 7.6 7.3 104 Shell Creek 9580 11.9 8.6 138 8.3 8.1 102 Timber Creek 7950 2.1 2.8 75 1.5 4.3 35 ----- ----- Basin Index (%) 126 91 SHOSHONE RIVER Blackwater 9780 21.7 13.2 164 19.1 12.2 157 Evening Star 9200 23.8 14.5 164 25.3 16.5 153 Marquette 8760 3.6 -M * 6.7 -M * Sylvan Road 7120 8.4 7.2 117 13.0 11.1 117 Younts Peak 8350 -M 8.8 * -M 9.7 * ----- ----- Basin Index (%) 154 144 POWDER RIVER Bear Trap Meadow 8200 4.7 3.1 152 5.9 4.9 120 Cloud Peak Reservoir 9860 8.2 7.7 106 7.6 7.4 103 Grave Springs 8550 4.2 4.6 91 3.4 6.0 57 Hansen Sawmill 8360 3.9 3.7 105 5.3 4.7 113 Middle Powder 7760 5.3 6.0 88 3.6 6.9 52 Powder River Pass 9480 9.1 5.9 154 7.6 7.3 104 Soldier Park 8720 2.7 -M * 5.5 -M * ----- ----- Basin Index (%) 114 90 TONGUE RIVER Big Goose 7990 3.7 4.4 84 4.3 6.1 70 Bone Springs Div 9350 10.0 9.2 109 7.4 8.9 83 Burgess Junction 7880 4.6 6.2 74 4.0 7.0 57 Dome Lake 8880 6.2 6.4 97 5.9 7.8 76 Little Goose 8870 4.7 -M * 6.5 -M * Sucker Creek 8880 5.1 6.6 77 -M 8.1 * Tie Creek 6870 1.8 3.1 58 4.9 6.7 73 ----- ----- Basin Index (%) 87 73 BELLE FOURCHE Cole Canyon 5910 3.4 3.0 113 5.1 5.4 94 ----- ----- Basin Index (%) 113 94 CHEYENNE RIVER BASIN Blind Park 6890 4.3 4.1 105 6.3 7.2 88 North Rapid Creek 6130 4.6 3.9 118 4.8 5.9 81 ----- ----- Basin Index (%) 111 85 UPPER N. PLATTE Arapaho Ridge 10960 11.4 11.4 100 11.4 13.0 88 Blackhall Mtn 9820 14.7 -M * 15.0 -M * Columbine 9160 5.4 13.2 41 -M 14.8 * Divide Peak 8880 8.1 11.2 72 11.3 12.6 90 Joe Wright 10120 9.6 12.1 79 16.7 14.8 113 Laprele Creek 8375 3.9 5.3 74 5.5 7.0 79 Med Bow 10500 22.4 -M * 19.2 -M * North French Creek 10130 15.8 14.6 108 16.2 15.4 105 Never Summer 10280 10.0 11.1 90 8.7 -M * Old Battle 10000 13.9 16.8 83 13.2 20.6 64 Rawah 9020 6.5 5.7 114 9.4 8.6 109 Sage Creek Basin 7850 5.6 7.5 75 6.9 8.9 78 Sand Lake 10050 15.1 15.2 99 12.5 13.9 90 South Brush Creek 8440 5.8 6.6 88 7.4 8.8 84 Tower 10500 17.0 24.6 69 17.6 23.3 76 Webber Springs 9250 10.0 12.4 81 12.0 15.6 77 Willow Creek Pass 9540 8.0 6.7 119 8.5 7.7 110 Zirkel 9340 11.2 16.4 68 16.4 17.0 96 ----- ----- Basin Index (%) 82 88 SWEETWATER Deer Park 9700 7.6 8.0 95 8.8 11.5 77 Larsen Creek 9000 4.3 6.5 66 6.9 -M * South Pass 9040 7.1 8.1 88 4.9 10.1 49 ----- ----- Basin Index (%) 84 63 LOWER N. PLATTE Casper Mtn. 7900 5.0 7.0 71 -M 8.5 * Laprele Creek 8375 3.9 5.3 74 5.5 7.0 79 Reno Hill 8400 6.1 7.1 86 7.2 8.4 86 Windy Peak 7900 3.7 3.9 95 4.9 6.0 82 ----- ----- Basin Index (%) 80 82 LARAMIE RIVER Brooklyn Lake 10240 13.2 11.3 117 14.1 11.8 119 Cinnabar Park 9574 13.6 12.0 113 15.9 14.6 109 Crow Creek 8330 1.9 5.5 35 7.1 6.1 116 Deadman Hill 10220 11.3 8.8 128 11.2 9.5 118 Rawah 9020 6.5 5.7 114 9.4 8.6 109 Roach 9700 8.3 9.4 88 10.7 11.0 97 ----- ----- Basin Index (%) 104 111 S. PLATTE Black Mountain 8920 5.5 -M * 8.1 -M * Crow Creek 8330 1.9 5.5 35 7.1 6.1 116 Deadman Hill 10220 11.3 8.8 128 11.2 9.5 118 ----- ----- Basin Index (%) 92 117 LITTLE SNAKE RIVER Battle Mountain 7440 3.2 6.3 51 -M 8.9 * Divide Peak 8880 8.1 11.2 72 11.3 12.6 90 Elk River 8700 7.8 9.9 79 9.2 11.7 79 Little Snake River 8915 10.4 13.2 79 15.6 18.8 83 Old Battle 10000 13.9 16.8 83 13.2 20.6 64 Sage Creek Basin 7850 5.6 7.5 75 6.9 8.9 78 Sandstone RS 8150 5.1 7.3 70 5.0 11.0 45 Whiskey Park 8950 11.3 14.8 76 14.2 16.1 88 ----- ----- Basin Index (%) 75 76 UPPER GREEN RIVER Big Sandy Opening 9080 7.8 7.1 110 8.0 7.7 104 Blind Bull Sum 8650 17.3 12.8 135 11.0 11.8 93 East Rim Divide 7930 6.2 6.2 100 6.6 7.1 93 Elkhart Park G.S. 9400 6.9 7.0 99 6.9 7.9 87 Gros Ventre Summit 8750 9.4 7.8 121 8.8 7.6 116 Gunsight Pass 9820 9.0 7.8 115 9.4 8.2 115 Kendall R.S. 7740 8.4 6.9 122 9.3 8.4 111 Loomis Park 8240 8.9 8.7 102 9.8 10.3 95 New Fork Lake 8340 6.7 6.3 106 6.0 6.5 92 Pocket Creek 9360 6.1 -M * 5.4 -M * Snider Basin 8060 6.5 6.7 97 8.3 8.4 99 Spring Creek Divide 9000 13.9 12.7 109 13.8 14.2 97 Triple Peak 8500 14.4 11.8 122 16.5 14.6 113 ----- ----- Basin Index (%) 113 102 LOWER GREEN RIVER Blacks Fork Jct 8869 4.0 -M * 5.6 -M * Buck Pasture 9632 6.6 -M * 7.6 -M * EF Blacks Fork GS 9360 3.7 -M * 4.1 -M * Hams Fork 7840 4.6 6.5 71 5.2 6.7 78 Hewinta 9500 4.6 5.1 90 6.6 8.0 82 Hickerson Park 9122 4.1 3.3 124 3.5 5.7 61 Hole-in-Rock 9168 3.6 3.7 97 4.0 5.4 74 Indian Creek 9425 11.7 13.5 87 8.8 12.8 69 Kelley R.S. 8180 7.0 8.1 86 8.2 10.6 77 Spirit Lk 10235 4.6 -M * 5.4 -M * Steel Creek Park 10158 8.1 7.7 105 8.2 9.2 89 ----- ----- Basin Index (%) 91 76 UPPER BEAR RIVER Bear River RS 8777 5.0 -M * 6.5 -M * Bug Lake 7987 8.8 9.2 96 9.7 11.4 85 Burts Miller Ranch 8000 3.7 -M * 4.1 -M * Chalk Creek #1 9171 8.4 12.1 69 9.4 14.3 66 Hayden Fork 9130 7.1 7.8 91 8.9 12.0 74 Kelley R.S. 8180 7.0 8.1 86 8.2 10.6 77 Lily Lake 9133 6.5 6.8 96 6.9 9.9 70 Monte Cristo 8932 11.6 14.1 82 11.5 15.0 77 Salt River Summit 7640 5.3 7.1 75 7.2 9.8 73 ----- ----- Basin Index (%) 84 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.