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 WEDNESDAY: JANUARY 31 , 2018 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 12.0 10.8 111 13.6 14.0 97 Black Bear 8170 26.6 23.2 115 25.6 24.8 103 Blind Bull Sum 8650 19.6 13.7 143 12.2 12.8 95 Cottonwood Creek 7670 13.6 12.7 107 15.6 15.8 99 East Rim Divide 7930 7.2 6.8 106 7.3 7.7 95 Grand Targhee 9260 -M 23.5 * 19.6 20.5 96 Granite Creek 6770 10.4 10.4 100 13.2 13.6 97 Grassy Lake 7265 19.0 20.0 95 22.7 23.8 95 Gros Ventre Summit 8750 9.7 8.3 117 9.2 8.2 112 Gunsight Pass 9820 9.5 8.2 116 9.9 8.8 112 Lewis Lake Divide 7850 21.8 19.8 110 24.7 23.1 107 Phillips Bench 8200 14.4 15.9 91 15.7 18.1 87 Salt River Summit 7640 6.2 7.7 81 8.1 10.6 76 Snake River Station 6920 11.4 10.7 107 15.8 15.4 103 Spring Creek Divide 9000 15.8 14.3 110 15.5 15.3 101 Thumb Divide 7980 11.9 9.6 124 12.7 12.1 105 Togwotee Pass 9580 19.4 14.9 130 19.9 15.8 126 Two Ocean Plateau 9240 25.2 17.4 145 18.7 17.2 109 Willow Creek 8080 19.3 17.0 114 22.2 21.5 103 Younts Peak 8350 -M 9.5 * -M 10.4 * ----- ----- Basin Index (%) 113 101 MADISON-GALLATIN Black Bear 8170 26.6 23.2 115 25.6 24.8 103 Canyon 7870 11.0 8.1 136 12.7 10.7 119 Madison Plateau 7750 16.3 14.0 116 17.1 17.3 99 West Yellowstone 6700 8.2 7.0 117 11.1 9.6 116 Whiskey Creek 6800 9.8 9.6 102 12.1 13.2 92 ----- ----- Basin Index (%) 116 104 YELLOWSTONE Beartooth Lake 9360 24.2 13.8 175 22.2 12.8 173 Burnt Mtn 5880 3.9 2.4 162 9.1 7.8 117 Canyon 7870 11.0 8.1 136 12.7 10.7 119 Cole Creek 7850 9.5 8.3 114 6.1 7.6 80 Evening Star 9200 25.4 16.2 157 26.8 17.8 151 Fisher Creek 9100 33.1 20.5 161 28.7 20.6 139 Northeast Entrance 7350 7.5 6.3 119 11.0 8.2 134 Parker Peak 9400 21.7 12.9 168 18.9 11.3 167 Sylvan Lake 8420 15.4 12.9 119 17.2 14.8 116 Thumb Divide 7980 11.9 9.6 124 12.7 12.1 105 Two Ocean Plateau 9240 25.2 17.4 145 18.7 17.2 109 White Mill 8700 25.5 14.5 176 18.4 15.3 120 Wolverine 7650 11.4 7.0 163 13.7 8.1 169 ----- ----- Basin Index (%) 151 132 WIND RIVER Burroughs Creek 8750 9.4 -M * 11.5 -M * Castle Creek 8400 5.4 -M * 6.8 -M * Cold Springs 9630 6.1 4.5 136 6.7 6.2 108 Deer Park 9700 -M 9.3 * 9.4 12.2 77 Hobbs Park 10100 11.3 7.9 143 9.4 7.7 122 Kirwin 9550 12.5 5.8 216 11.1 7.2 154 Little Warm 9370 10.5 6.3 167 10.7 8.1 132 Owl Creek 8975 2.8 3.1 90 4.4 3.6 122 South Pass 9040 7.4 8.7 85 5.3 10.9 49 St. Lawrence Alt 8620 2.7 4.2 64 6.1 5.3 115 Togwotee Pass 9580 19.4 14.9 130 19.9 15.8 126 Townsend Creek 8700 4.9 5.1 96 6.3 7.0 90 ----- ----- Basin Index (%) 128 106 BIGHORN BASIN Bald Mtn. 9380 12.5 10.8 116 8.3 10.6 78 Bear Trap Meadow 8200 5.1 3.4 150 6.0 5.1 118 Bone Springs Div 9350 10.7 9.8 109 8.0 9.6 83 Grave Springs 8550 4.3 4.9 88 3.6 6.4 56 Kirwin 9550 12.5 5.8 216 11.1 7.2 154 Marquette 8760 3.7 -M * 7.0 -M * Middle Powder 7760 5.4 6.3 86 3.9 7.3 53 Owl Creek 8975 2.8 3.1 90 4.4 3.6 122 Powder River Pass 9480 9.5 6.4 148 8.1 7.8 104 Shell Creek 9580 12.5 9.1 137 8.7 8.9 98 Timber Creek 7950 2.3 2.9 79 -M 4.5 * ----- ----- Basin Index (%) 124 93 SHOSHONE RIVER Blackwater 9780 22.8 14.7 155 20.4 13.2 155 Evening Star 9200 25.4 16.2 157 26.8 17.8 151 Marquette 8760 3.7 -M * 7.0 -M * Sylvan Road 7120 9.1 7.8 117 13.7 11.8 116 Younts Peak 8350 -M 9.5 * -M 10.4 * ----- ----- Basin Index (%) 148 142 POWDER RIVER Bear Trap Meadow 8200 5.1 3.4 150 6.0 5.1 118 Cloud Peak Reservoir 9860 9.3 8.2 113 8.4 7.9 106 Grave Springs 8550 4.3 4.9 88 3.6 6.4 56 Hansen Sawmill 8360 4.4 4.0 110 5.6 5.0 112 Middle Powder 7760 5.4 6.3 86 3.9 7.3 53 Powder River Pass 9480 9.5 6.4 148 8.1 7.8 104 Soldier Park 8720 2.9 -M * 5.8 -M * ----- ----- Basin Index (%) 114 90 TONGUE RIVER Big Goose 7990 4.4 4.9 90 4.7 6.5 72 Bone Springs Div 9350 10.7 9.8 109 8.0 9.6 83 Burgess Junction 7880 5.2 6.6 79 4.5 7.4 61 Dome Lake 8880 7.2 6.8 106 6.3 8.3 76 Little Goose 8870 5.3 -M * 7.3 -M * Sucker Creek 8880 5.7 7.0 81 -M 8.6 * Tie Creek 6870 2.1 3.4 62 5.3 7.0 76 ----- ----- Basin Index (%) 92 74 BELLE FOURCHE Cole Canyon 5910 3.8 3.2 119 5.3 5.6 95 ----- ----- Basin Index (%) 119 95 CHEYENNE RIVER BASIN Blind Park 6890 4.6 4.6 100 6.8 7.7 88 North Rapid Creek 6130 4.8 4.2 114 5.2 6.2 84 ----- ----- Basin Index (%) 107 86 UPPER N. PLATTE Arapaho Ridge 10960 11.9 13.1 91 11.9 14.0 85 Blackhall Mtn 9820 15.8 -M * 16.0 -M * Columbine 9160 5.5 14.5 38 14.0 16.3 86 Divide Peak 8880 8.6 12.2 70 11.9 13.5 88 Joe Wright 10120 9.9 12.9 77 17.2 15.9 108 Laprele Creek 8375 4.1 5.4 76 5.7 7.5 76 Med Bow 10500 25.4 -M * 21.5 -M * North French Creek 10130 17.2 15.9 108 17.6 16.8 105 Never Summer 10280 10.8 12.4 87 9.0 -M * Old Battle 10000 14.8 19.0 78 14.6 22.2 66 Rawah 9020 6.5 6.1 107 9.7 9.0 108 Sage Creek Basin 7850 6.0 8.3 72 7.2 9.8 73 Sand Lake 10050 16.5 16.3 101 13.5 15.0 90 South Brush Creek 8440 6.1 7.3 84 7.7 9.5 81 Tower 10500 18.1 27.2 67 19.0 25.3 75 Webber Springs 9250 10.7 13.5 79 13.0 16.9 77 Willow Creek Pass 9540 8.2 7.5 109 8.8 8.3 106 Zirkel 9340 12.5 18.3 68 17.5 18.7 94 ----- ----- Basin Index (%) 80 87 SWEETWATER Deer Park 9700 -M 9.3 * 9.4 12.2 77 Larsen Creek 9000 4.9 7.2 68 7.4 -M * South Pass 9040 7.4 8.7 85 5.3 10.9 49 ----- ----- Basin Index (%) 77 64 LOWER N. PLATTE Casper Mtn. 7900 5.1 7.5 68 4.2 9.0 47 Laprele Creek 8375 4.1 5.4 76 5.7 7.5 76 Reno Hill 8400 6.4 7.6 84 7.4 8.8 84 Windy Peak 7900 3.9 4.1 95 5.5 6.3 87 ----- ----- Basin Index (%) 79 72 LARAMIE RIVER Brooklyn Lake 10240 14.4 12.0 120 15.4 12.8 120 Cinnabar Park 9574 14.7 13.1 112 17.1 15.7 109 Crow Creek 8330 1.7 5.7 30 7.2 6.4 112 Deadman Hill 10220 12.0 10.0 120 11.7 10.2 115 Rawah 9020 6.5 6.1 107 9.7 9.0 108 Roach 9700 8.7 9.9 88 11.3 11.7 97 ----- ----- Basin Index (%) 102 110 S. PLATTE Black Mountain 8920 5.8 -M * 8.4 -M * Crow Creek 8330 1.7 5.7 30 7.2 6.4 112 Deadman Hill 10220 12.0 10.0 120 11.7 10.2 115 ----- ----- Basin Index (%) 87 114 LITTLE SNAKE RIVER Battle Mountain 7440 3.3 7.0 47 6.4 9.6 67 Divide Peak 8880 8.6 12.2 70 11.9 13.5 88 Elk River 8700 8.3 11.1 75 9.8 12.6 78 Little Snake River 8915 11.4 15.4 74 16.7 20.4 82 Old Battle 10000 14.8 19.0 78 14.6 22.2 66 Sage Creek Basin 7850 6.0 8.3 72 7.2 9.8 73 Sandstone RS 8150 5.1 8.0 64 5.3 11.9 45 Whiskey Park 8950 12.4 15.8 78 15.3 17.7 86 ----- ----- Basin Index (%) 72 74 UPPER GREEN RIVER Big Sandy Opening 9080 8.3 8.1 102 8.4 8.3 101 Blind Bull Sum 8650 19.6 13.7 143 12.2 12.8 95 East Rim Divide 7930 7.2 6.8 106 7.3 7.7 95 Elkhart Park G.S. 9400 7.6 7.4 103 7.5 8.4 89 Gros Ventre Summit 8750 9.7 8.3 117 9.2 8.2 112 Gunsight Pass 9820 9.5 8.2 116 9.9 8.8 112 Kendall R.S. 7740 9.0 7.8 115 9.8 9.2 107 Loomis Park 8240 9.9 9.4 105 10.6 11.2 95 New Fork Lake 8340 7.2 6.8 106 6.5 7.0 93 Pocket Creek 9360 6.3 -M * 5.7 -M * Snider Basin 8060 7.4 7.4 100 9.3 9.2 101 Spring Creek Divide 9000 15.8 14.3 110 15.5 15.3 101 Triple Peak 8500 16.0 13.1 122 18.0 15.9 113 ----- ----- Basin Index (%) 114 102 LOWER GREEN RIVER Blacks Fork Jct 8869 4.8 -M * 6.0 -M * Buck Pasture 9632 7.4 -M * 8.0 -M * EF Blacks Fork GS 9360 4.6 -M * 4.4 -M * Hams Fork 7840 5.2 7.0 74 5.7 7.3 78 Hewinta 9500 5.2 5.6 93 7.3 8.6 85 Hickerson Park 9122 4.4 3.8 116 4.2 6.1 69 Hole-in-Rock 9168 4.0 4.0 100 4.5 5.7 79 Indian Creek 9425 12.7 14.5 88 9.7 13.9 70 Kelley R.S. 8180 7.8 8.9 88 8.9 11.5 77 Spirit Lk 10235 5.0 -M * 5.8 -M * Steel Creek Park 10158 8.1 8.6 94 8.6 9.8 88 ----- ----- Basin Index (%) 90 78 UPPER BEAR RIVER Bear River RS 8777 5.4 -M * 6.9 -M * Bug Lake 7987 9.4 10.5 90 10.3 12.3 84 Burts Miller Ranch 8000 4.1 -M * 4.6 -M * Chalk Creek #1 9171 9.0 13.3 68 9.8 15.6 63 Hayden Fork 9130 7.5 8.5 88 9.5 13.0 73 Kelley R.S. 8180 7.8 8.9 88 8.9 11.5 77 Lily Lake 9133 6.8 7.4 92 7.2 10.6 68 Monte Cristo 8932 12.3 15.8 78 12.4 16.2 77 Salt River Summit 7640 6.2 7.7 81 8.1 10.6 76 ----- ----- Basin Index (%) 82 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.