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: NOVEMBER 21 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 6.0 2.3 261 7.5 4.7 160 Black Bear 8170 11.4 6.9 165 10.4 8.1 128 Blind Bull Sum 8650 9.9 3.7 268 6.5 4.3 151 Cottonwood Creek 7670 4.2 2.9 145 5.5 5.4 102 East Rim Divide 7930 3.0 1.4 214 3.6 2.7 133 Grand Targhee 9260 16.8 8.8 191 10.0 8.9 112 Granite Creek 6770 -M 1.5 * -M 4.1 * Grassy Lake 7265 7.2 4.5 160 9.2 7.4 124 Gros Ventre Summit 8750 6.3 2.9 217 5.8 3.3 176 Gunsight Pass 9820 4.9 2.6 188 5.6 3.5 160 Lewis Lake Divide 7850 9.3 5.0 186 10.6 7.4 143 Phillips Bench 8200 7.1 3.8 187 8.0 5.5 145 Salt River Summit 7760 2.1 1.2 175* 3.6 3.4 106 Snake River Station 6920 4.4 1.8 244 7.1 5.0 142 Spring Creek Divide 9000 6.3 3.8 166 6.7 5.0 134 Thumb Divide 7980 5.5 2.2 250 6.7 4.3 156 Togwotee Pass 9580 10.5 5.4 194 10.0 5.7 175 Two Ocean Plateau 9240 14.9 6.7 222 9.4 6.3 149 Willow Creek 8380 7.0 3.9 179 9.4 7.4 127 Younts Peak 8350 -M 3.2 * -M 4.1 * ----- ----- Basin Index (%) 196 138 MADISON-GALLATIN Black Bear 8170 11.4 6.9 165 10.4 8.1 128 Canyon 7870 3.6 2.0 180 4.7 3.8 124 Madison Plateau 7750 6.9 3.7 186 7.2 5.5 131 West Yellowstone 6700 2.6 1.3 200 4.4 3.3 133 Whiskey Creek 6800 -M 2.1 * 4.6 4.5 102 ----- ----- Basin Index (%) 176 124 YELLOWSTONE Beartooth Lake 9360 11.7 5.0 234 9.8 4.3 228 Burnt Mtn 5880 2.4 .6 400 5.2 4.6 113 Canyon 7870 3.6 2.0 180 4.7 3.8 124 Cole Creek 7850 4.7 3.4 138 3.4 4.3 79 Evening Star 9200 12.6 5.5 229 12.3 6.6 186 Fisher Creek 9100 15.1 6.6 229 12.5 7.2 174 Northeast Entrance 7350 2.9 1.1 264 4.9 3.4 144 Parker Peak 9400 11.5 4.8 240 8.8 4.6 191 Sylvan Lake 8420 8.2 3.9 210 8.3 5.7 146 Thumb Divide 7980 5.5 2.2 250 6.7 4.3 156 Two Ocean Plateau 9240 14.9 6.7 222 9.4 6.3 149 White Mill 8700 12.5 4.6 272 7.7 5.7 135 Wolverine 7650 4.3 1.2 358 5.9 3.3 179 ----- ----- Basin Index (%) 231 155 WIND RIVER Burroughs Creek 8750 4.9 -M * 5.2 -M * Castle Creek 8400 2.2 -M * 3.7 -M * Cold Springs 9630 2.7 1.8 150 3.5 3.1 113 Deer Park 9700 5.2 3.4 153 5.8 4.8 121 Hobbs Park 10100 7.5 3.8 197 6.1 3.7 165 Kirwin 9550 7.4 2.9 255 5.7 3.3 173 Little Warm 9370 6.8 2.3 296 6.0 3.4 176 Owl Creek 8975 1.2 1.4 86 2.8 2.0 140 South Pass 9040 4.2 3.0 140 3.6 4.3 84 St. Lawrence Alt 8620 1.8 1.6 112 3.8 2.7 141 Togwotee Pass 9580 10.5 5.4 194 10.0 5.7 175 Townsend Creek 8700 2.8 2.0 140 4.1 3.5 117 ----- ----- Basin Index (%) 182 141 BIGHORN BASIN Bald Mtn. 9380 5.9 4.7 126 3.8 4.4 86 Bear Trap Meadow 8200 2.1 1.1 191 3.2 2.7 119 Bone Springs Div 9350 4.1 4.3 95 3.8 4.2 90 Grave Springs 8550 1.5 1.5 100 1.9 3.2 59 Kirwin 9550 7.4 2.9 255 5.7 3.3 173 Marquette 8760 1.9 -M * 4.2 -M * Middle Powder 7760 2.0 2.0 100 1.8 3.8 47 Owl Creek 8975 1.2 1.4 86 2.8 2.0 140 Powder River Pass 9480 5.2 2.2 236 4.5 3.4 132 Shell Creek 9580 7.4 4.1 180 4.4 3.8 116 Timber Creek 7950 1.3 1.4 93 1.1 2.9 38 ----- ----- Basin Index (%) 149 98 SHOSHONE RIVER Blackwater 9780 13.1 5.3 247 10.3 5.3 194 Evening Star 9200 12.6 5.5 229 12.3 6.6 186 Marquette 8760 1.9 -M * 4.2 -M * Sylvan Road 7120 4.1 1.7 241 6.6 4.5 147 Younts Peak 8350 -M 3.2 * -M 4.1 * ----- ----- Basin Index (%) 238 178 POWDER RIVER Bear Trap Meadow 8200 2.1 1.1 191 3.2 2.7 119 Cloud Peak Reservoir 9860 3.4 3.3 103 4.5 4.1 110 Grave Springs 8550 1.5 1.5 100 1.9 3.2 59 Hansen Sawmill 8360 2.3 1.2 192 3.3 2.7 122 Middle Powder 7760 2.0 2.0 100 1.8 3.8 47 Powder River Pass 9480 5.2 2.2 236 4.5 3.4 132 Soldier Park 8720 1.5 -M * 3.4 -M * ----- ----- Basin Index (%) 146 96 TONGUE RIVER Big Goose 7990 1.4 1.9 74 2.2 3.5 63 Bone Springs Div 9350 4.1 4.3 95 3.8 4.2 90 Burgess Junction 7880 1.7 2.5 68 2.4 3.6 67 Dome Lake 8880 2.7 3.0 90 3.0 4.2 71 Little Goose 8870 1.7 -M * 3.4 -M * Sucker Creek 8880 2.0 2.8 71 1.2 4.1 29 Tie Creek 6870 1.1 .6 183 2.5 3.7 68 ----- ----- Basin Index (%) 86 65 BELLE FOURCHE Cole Canyon 5910 .7 .6 117 2.0 3.1 65 ----- ----- Basin Index (%) 117 65 CHEYENNE RIVER BASIN Blind Park 6890 1.2 1.3 92 3.1 3.9 79 North Rapid Creek 6130 1.4 1.0 140 2.0 3.3 61 ----- ----- Basin Index (%) 113 71 UPPER N. PLATTE Arapaho Ridge 10960 5.0 4.8 104 5.6 5.8 97 Blackhall Mtn 9820 6.3 -M * 6.9 -M * Columbine 9160 2.7 3.4 79 6.3 5.5 115 Divide Peak 8880 2.9 3.5 83 5.9 5.5 107 Joe Wright 10120 3.7 4.8 77 8.8 6.6 133 Laprele Creek 8375 1.3 1.9 68 2.6 3.4 76 Med Bow 10500 8.7 -M * 7.7 -M * North French Creek 10130 6.1 5.0 122 7.0 6.1 115 Never Summer 10280 5.6 4.2 133 5.7 -M * Old Battle 10000 5.9 6.1 97 5.8 8.0 72 Rawah 9020 2.3 1.9 121 5.5 4.2 131 Sage Creek Basin 7850 1.7 1.7 100 3.3 3.7 89 Sand Lake 10050 7.4 5.5 135 6.7 5.9 114 South Brush Creek 8440 2.8 1.9 147 4.1 4.0 102 Tower 10500 6.1 9.0 68 8.8 9.1 97 Webber Springs 9250 3.5 3.7 95 5.7 6.1 93 Willow Creek Pass 9540 4.6 2.9 159 4.9 3.6 136 Zirkel 9340 3.6 3.4 106 7.9 6.9 114 ----- ----- Basin Index (%) 102 105 SWEETWATER Deer Park 9700 5.2 3.4 153 5.8 4.8 121 Larsen Creek 9000 1.9 1.7 112 3.5 -M * South Pass 9040 4.2 3.0 140 3.6 4.3 84 ----- ----- Basin Index (%) 140 103 LOWER N. PLATTE Casper Mtn. 7900 1.8 2.9 62 2.0 4.5 44 Laprele Creek 8375 1.3 1.9 68 2.6 3.4 76 Reno Hill 8400 2.5 2.6 96 3.6 4.2 86 Windy Peak 7900 1.3 1.4 93 2.5 3.0 83 ----- ----- Basin Index (%) 78 71 LARAMIE RIVER Brooklyn Lake 10240 3.7 3.6 103 5.3 4.7 113 Cinnabar Park 9574 5.4 4.0 135 7.2 5.4 133 Crow Creek 8330 .6 1.2 50 3.8 3.0 127 Deadman Hill 10220 6.5 3.8 171 6.7 4.4 152 Rawah 9020 2.3 1.9 121 5.5 4.2 131 Roach 9700 4.3 3.0 143 6.2 4.6 135 ----- ----- Basin Index (%) 130 132 S. PLATTE Black Mountain 8920 2.9 -M * 5.0 -M * Crow Creek 8330 .6 1.2 50 3.8 3.0 127 Deadman Hill 10220 6.5 3.8 171 6.7 4.4 152 ----- ----- Basin Index (%) 142 142 LITTLE SNAKE RIVER Battle Mountain 7440 .6 .9 67* -M 3.8 * Divide Peak 8880 2.9 3.5 83 5.9 5.5 107 Elk River 8700 2.4 2.0 120 5.0 4.6 109 Little Snake River 8915 3.1 3.0 103 6.6 7.0 94 Old Battle 10000 5.9 6.1 97 5.8 8.0 72 Sage Creek Basin 7850 1.7 1.7 100 3.3 3.7 89 Sandstone RS 8150 1.4 1.2 117* 2.8 4.3 65 Whiskey Park 8950 3.0 3.7 81 5.8 5.8 100 ----- ----- Basin Index (%) 95 90 UPPER GREEN RIVER Big Sandy Opening 9080 3.2 3.0 107 3.8 3.3 115 Blind Bull Sum 8650 9.9 3.7 268 6.5 4.3 151 East Rim Divide 7930 3.0 1.4 214 3.6 2.7 133 Elkhart Park G.S. 9400 3.1 2.6 119 3.4 3.4 100 Gros Ventre Summit 8750 6.3 2.9 217 5.8 3.3 176 Gunsight Pass 9820 4.9 2.6 188 5.6 3.5 160 Kendall R.S. 7740 3.8 1.8 211 4.6 3.2 144 Loomis Park 8240 4.6 2.1 219 5.1 3.7 138 New Fork Lake 8340 2.7 1.8 150 2.3 2.7 85 Pocket Creek 9360 3.8 -M * 3.5 -M * Snider Basin 8060 2.7 1.8 150 3.9 3.1 126 Spring Creek Divide 9000 6.3 3.8 166 6.7 5.0 134 Triple Peak 8500 6.6 3.8 174 8.5 5.2 163 ----- ----- Basin Index (%) 182 138 LOWER GREEN RIVER Blacks Fork Jct 8869 1.8 -M * 2.4 -M * Buck Pasture 9632 2.8 -M * 3.3 -M * EF Blacks Fork GS 9360 2.0 -M * 2.6 -M * Hams Fork 7840 1.6 1.5 107 2.7 2.7 100 Hewinta 9500 1.1 1.4 79 2.9 3.7 78 Hickerson Park 9122 1.8 1.3 138 1.8 3.2 56 Hole-in-Rock 9168 1.5 1.2 125 2.0 3.1 65 Indian Creek 9425 5.4 4.6 117 4.6 4.7 98 Kelley R.S. 8180 3.1 2.3 135 3.7 3.9 95 Spirit Lk 10235 2.1 -M * 2.3 -M * Steel Creek Park 10158 3.5 3.1 113 3.6 4.2 86 ----- ----- Basin Index (%) 117 84 UPPER BEAR RIVER Bear River RS 8777 1.7 -M * 2.8 -M * Bug Lake 7987 3.5 2.5 140 5.0 4.3 116 Burts Miller Ranch 8000 1.2 -M * 1.8 -M * Chalk Creek #1 9171 3.7 3.8 97 4.3 6.0 72 Hayden Fork 9130 2.5 2.2 114 3.6 4.9 73 Kelley R.S. 8180 3.1 2.3 135 3.7 3.9 95 Lily Lake 9133 1.9 2.2 86 2.8 4.4 64 Monte Cristo 8932 5.2 3.4 153 5.3 5.6 95 Salt River Summit 7760 2.1 1.2 175* 3.6 3.4 106 ----- ----- Basin Index (%) 125 87 ----------------------------------------------------------------------------- -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.