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: NOVEMBER 27 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 5.8 3.3 176 7.9 5.5 144 Black Bear 8170 11.7 8.2 143 11.0 9.8 112 Blind Bull Sum 8650 10.9 4.5 242 7.0 5.2 135 Cottonwood Creek 7670 -M 3.6 * -M 6.3 * East Rim Divide 7930 3.0 1.7 176 4.0 3.1 129 Grand Targhee 9260 -M 9.5 * -M 9.4 * Granite Creek 6770 -M 2.2 * -M 4.9 * Grassy Lake 7265 6.8 6.0 113 9.8 9.0 109 Gros Ventre Summit 8750 6.7 3.4 197 6.0 3.9 154 Gunsight Pass 9820 -M 3.0 * -M 3.9 * Lewis Lake Divide 7850 9.3 6.6 141 11.8 9.0 131 Phillips Bench 8200 -M 4.8 * -M 6.8 * Salt River Summit 7760 -M 1.8 * -M 4.0 * Snake River Station 6920 3.9 2.9 134 7.3 6.1 120 Spring Creek Divide 9000 6.7 4.7 143 7.3 5.9 124 Thumb Divide 7980 5.8 2.9 200 6.9 5.0 138 Togwotee Pass 9580 12.2 6.4 191 11.5 6.6 174 Two Ocean Plateau 9240 15.6 8.2 190 10.4 7.5 139 Willow Creek 8380 7.3 5.0 146 10.3 8.8 117 Younts Peak 8350 -M 4.0 * -M 4.7 * ----- ----- Basin Index (%) 166 130 MADISON-GALLATIN Black Bear 8170 11.7 8.2 143 11.0 9.8 112 Canyon 7870 3.5 2.8 125 4.9 4.5 109 Madison Plateau 7750 6.8 4.7 145 7.4 6.7 110 West Yellowstone 6700 2.4 1.6 150 4.4 3.9 113 Whiskey Creek 6800 2.9 2.8 104 4.9 5.4 91 ----- ----- Basin Index (%) 136 108 YELLOWSTONE Beartooth Lake 9360 11.9 5.7 209 10.3 5.1 202 Burnt Mtn 5880 .0 1.1 0 5.5 4.9 112 Canyon 7870 3.5 2.8 125 4.9 4.5 109 Cole Creek 7850 4.4 3.7 119 3.6 4.8 75 Evening Star 9200 13.0 6.7 194 13.4 7.7 174 Fisher Creek 9100 15.2 8.2 185 12.9 8.4 154 Northeast Entrance 7350 1.8 1.5 120 5.3 3.9 136 Parker Peak 9400 11.8 5.7 207 9.1 5.3 172 Sylvan Lake 8420 8.2 4.8 171 8.6 6.7 128 Thumb Divide 7980 5.8 2.9 200 6.9 5.0 138 Two Ocean Plateau 9240 15.6 8.2 190 10.4 7.5 139 White Mill 8700 12.2 5.6 218 8.2 6.6 124 Wolverine 7650 2.7 1.7 159 6.3 3.8 166 ----- ----- Basin Index (%) 181 142 WIND RIVER Burroughs Creek 8750 5.2 -M * 6.2 -M * Castle Creek 8400 2.6 -M * 4.0 -M * Cold Springs 9630 3.2 2.2 145 3.7 3.5 106 Deer Park 9700 5.4 3.8 142 6.0 5.2 115 Hobbs Park 10100 7.8 4.3 181 6.3 4.2 150 Kirwin 9550 8.0 3.3 242 6.5 3.7 176 Little Warm 9370 7.3 2.6 281 6.7 3.9 172 Owl Creek 8975 1.4 1.5 93 3.1 2.1 148 South Pass 9040 4.3 3.6 119 3.7 5.0 74 St. Lawrence Alt 8620 1.9 1.9 100 3.8 3.1 123 Togwotee Pass 9580 12.2 6.4 191 11.5 6.6 174 Townsend Creek 8700 2.8 2.3 122 4.3 4.0 108 ----- ----- Basin Index (%) 170 135 BIGHORN BASIN Bald Mtn. 9380 6.2 5.5 113 4.1 4.9 84 Bear Trap Meadow 8200 2.2 1.3 169 3.3 3.0 110 Bone Springs Div 9350 4.3 4.8 90 3.9 4.6 85 Grave Springs 8550 1.7 1.6 106 1.9 3.5 54 Kirwin 9550 8.0 3.3 242 6.5 3.7 176 Marquette 8760 2.1 -M * 4.5 -M * Middle Powder 7760 1.9 2.7 70 2.0 4.2 48 Owl Creek 8975 1.4 1.5 93 3.1 2.1 148 Powder River Pass 9480 5.2 2.7 193 4.7 3.9 121 Shell Creek 9580 7.6 4.8 158 4.6 4.4 105 Timber Creek 7950 1.1 1.6 69 1.0 3.1 32 ----- ----- Basin Index (%) 133 94 SHOSHONE RIVER Blackwater 9780 13.3 6.7 199 10.8 6.1 177 Evening Star 9200 13.0 6.7 194 13.4 7.7 174 Marquette 8760 2.1 -M * 4.5 -M * Sylvan Road 7120 3.7 2.4 154 6.9 5.5 125 Younts Peak 8350 -M 4.0 * -M 4.7 * ----- ----- Basin Index (%) 190 161 POWDER RIVER Bear Trap Meadow 8200 2.2 1.3 169 3.3 3.0 110 Cloud Peak Reservoir 9860 3.5 3.7 95 4.7 4.5 104 Grave Springs 8550 1.7 1.6 106 1.9 3.5 54 Hansen Sawmill 8360 2.4 1.5 160 3.4 2.9 117 Middle Powder 7760 1.9 2.7 70 2.0 4.2 48 Powder River Pass 9480 5.2 2.7 193 4.7 3.9 121 Soldier Park 8720 1.3 -M * 3.5 -M * ----- ----- Basin Index (%) 125 91 TONGUE RIVER Big Goose 7990 1.5 2.1 71 2.3 3.9 59 Bone Springs Div 9350 4.3 4.8 90 3.9 4.6 85 Burgess Junction 7880 1.8 2.8 64 2.6 4.0 65 Dome Lake 8880 2.8 3.4 82 3.2 4.7 68 Little Goose 8870 1.6 -M * 3.5 -M * Sucker Creek 8880 2.1 3.2 66 1.5 4.4 34 Tie Creek 6870 .2 .7 29 2.6 4.0 65 ----- ----- Basin Index (%) 75 63 BELLE FOURCHE Cole Canyon 5910 .2 .7 29 2.2 3.3 67 ----- ----- Basin Index (%) 29 67 CHEYENNE RIVER BASIN Blind Park 6890 1.4 1.6 88 3.2 4.2 76 North Rapid Creek 6130 1.4 1.3 108 2.3 3.6 64 ----- ----- Basin Index (%) 97 71 UPPER N. PLATTE Arapaho Ridge 10960 5.3 5.4 98 5.8 6.2 94 Blackhall Mtn 9820 -M -M * -M -M * Columbine 9160 2.5 4.2 60 7.1 6.3 113 Divide Peak 8880 2.8 4.0 70 5.9 6.2 95 Joe Wright 10120 4.3 5.4 80 9.4 7.5 125 Laprele Creek 8375 1.4 2.2 64 2.8 3.8 74 Med Bow 10500 9.2 -M * 8.3 -M * North French Creek 10130 6.6 6.2 106 7.4 7.1 104 Never Summer 10280 5.8 4.6 126 5.8 -M * Old Battle 10000 6.1 6.8 90 6.4 9.2 70 Rawah 9020 2.6 2.2 118 6.0 4.4 136 Sage Creek Basin 7850 1.7 2.0 85 3.3 4.2 79 Sand Lake 10050 7.9 6.6 120 6.8 6.7 101 South Brush Creek 8440 2.8 2.4 117 4.4 4.5 98 Tower 10500 7.2 10.6 68 9.5 10.5 90 Webber Springs 9250 3.6 4.3 84 5.8 7.0 83 Willow Creek Pass 9540 4.9 3.3 148 5.1 4.1 124 Zirkel 9340 4.1 4.1 100 8.6 7.5 115 ----- ----- Basin Index (%) 94 99 SWEETWATER Deer Park 9700 5.4 3.8 142 6.0 5.2 115 Larsen Creek 9000 2.0 2.2 91 3.8 -M * South Pass 9040 4.3 3.6 119 3.7 5.0 74 ----- ----- Basin Index (%) 122 95 LOWER N. PLATTE Casper Mtn. 7900 1.6 3.2 50 2.2 5.0 44 Laprele Creek 8375 1.4 2.2 64 2.8 3.8 74 Reno Hill 8400 2.8 3.2 88 3.8 4.6 83 Windy Peak 7900 .9 1.6 56 2.9 3.4 85 ----- ----- Basin Index (%) 66 70 LARAMIE RIVER Brooklyn Lake 10240 4.3 4.1 105 5.8 5.3 109 Cinnabar Park 9574 6.0 4.7 128 7.6 6.0 127 Crow Creek 8330 .2 1.5 13 4.2 3.4 124 Deadman Hill 10220 6.8 4.4 155 7.0 5.0 140 Rawah 9020 2.6 2.2 118 6.0 4.4 136 Roach 9700 4.5 3.6 125 6.5 5.2 125 ----- ----- Basin Index (%) 119 127 S. PLATTE Black Mountain 8920 3.1 -M * 5.2 -M * Crow Creek 8330 .2 1.5 13 4.2 3.4 124 Deadman Hill 10220 6.8 4.4 155 7.0 5.0 140 ----- ----- Basin Index (%) 119 133 LITTLE SNAKE RIVER Battle Mountain 7440 .0 1.2 0 3.5 4.2 83 Divide Peak 8880 2.8 4.0 70 5.9 6.2 95 Elk River 8700 2.8 2.6 108 5.2 5.2 100 Little Snake River 8915 3.3 3.5 94 6.9 7.8 88 Old Battle 10000 6.1 6.8 90 6.4 9.2 70 Sage Creek Basin 7850 1.7 2.0 85 3.3 4.2 79 Sandstone RS 8150 .9 1.7 53 2.9 5.0 58 Whiskey Park 8950 3.4 4.3 79 6.2 6.7 93 ----- ----- Basin Index (%) 80 83 UPPER GREEN RIVER Big Sandy Opening 9080 3.7 3.4 109 4.3 3.8 113 Blind Bull Sum 8650 10.9 4.5 242 7.0 5.2 135 East Rim Divide 7930 3.0 1.7 176 4.0 3.1 129 Elkhart Park G.S. 9400 3.6 2.9 124 3.8 3.9 97 Gros Ventre Summit 8750 6.7 3.4 197 6.0 3.9 154 Gunsight Pass 9820 -M 3.0 * -M 3.9 * Kendall R.S. 7740 4.0 2.3 174 5.2 3.7 141 Loomis Park 8240 -M 2.8 * -M 4.4 * New Fork Lake 8340 3.0 2.0 150 2.4 3.1 77 Pocket Creek 9360 4.3 -M * 4.1 -M * Snider Basin 8060 2.5 2.4 104 4.5 3.6 125 Spring Creek Divide 9000 6.7 4.7 143 7.3 5.9 124 Triple Peak 8500 7.5 4.7 160 9.6 6.2 155 ----- ----- Basin Index (%) 161 128 LOWER GREEN RIVER Blacks Fork Jct 8869 1.4 -M * 2.5 -M * Buck Pasture 9632 2.8 -M * 3.5 -M * EF Blacks Fork GS 9360 1.8 -M * 3.3 -M * Hams Fork 7840 1.3 2.0 65 2.9 3.1 94 Hewinta 9500 1.1 1.7 65 2.9 4.2 69 Hickerson Park 9122 2.0 1.4 143 1.8 3.5 51 Hole-in-Rock 9168 1.7 1.5 113 2.1 3.4 62 Indian Creek 9425 6.0 5.2 115 5.0 5.4 93 Kelley R.S. 8180 3.1 2.7 115 3.9 4.5 87 Spirit Lk 10235 2.2 -M * 2.3 -M * Steel Creek Park 10158 3.7 3.6 103 3.7 4.8 77 ----- ----- Basin Index (%) 104 77 UPPER BEAR RIVER Bear River RS 8777 1.3 -M * 2.8 -M * Bug Lake 7987 3.0 3.2 94 5.0 5.0 100 Burts Miller Ranch 8000 .7 -M * 1.8 -M * Chalk Creek #1 9171 3.5 4.6 76 4.4 7.0 63 Hayden Fork 9130 2.3 2.8 82 3.7 5.8 64 Kelley R.S. 8180 3.1 2.7 115 3.9 4.5 87 Lily Lake 9133 1.8 2.5 72 2.8 5.1 55 Monte Cristo 8932 5.1 4.6 111 5.4 6.6 82 Salt River Summit 7760 -M 1.8 * -M 4.0 * ----- ----- Basin Index (%) 92 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.