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 SATURDAY: NOVEMBER 18 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 5.6 1.9 295 7.1 4.2 169 Black Bear 8170 10.7 6.3 170 9.2 7.4 124 Blind Bull Sum 8650 9.3 3.3 282 6.0 3.9 154 Cottonwood Creek 7670 3.8 2.6 146 5.0 5.0 100 East Rim Divide 7930 2.6 1.3 200 3.3 2.5 132 Grand Targhee 9260 15.9 8.1 196 9.1 8.8 103 Granite Creek 6770 -M 1.4 * -M 3.8 * Grassy Lake 7265 6.2 3.9 159 7.8 6.8 115 Gros Ventre Summit 8750 6.2 2.8 221 5.5 3.1 177 Gunsight Pass 9820 4.6 2.5 184 5.2 3.4 153 Lewis Lake Divide 7850 8.5 4.2 202 9.7 6.8 143 Phillips Bench 8200 6.7 3.4 197 7.5 5.1 147 Salt River Summit 7760 1.9 1.0 190* 3.2 3.2 100 Snake River Station 6920 4.0 1.4 286* 6.3 4.6 137 Spring Creek Divide 9000 5.6 3.3 170 6.0 4.7 128 Thumb Divide 7980 5.2 2.0 260 6.3 3.9 162 Togwotee Pass 9580 10.0 5.0 200 9.2 5.3 174 Two Ocean Plateau 9240 14.3 6.0 238 9.0 5.8 155 Willow Creek 8380 6.6 3.6 183 8.8 6.9 128 Younts Peak 8350 6.9 3.0 230 6.2 3.8 163 ----- ----- Basin Index (%) 205 137 MADISON-GALLATIN Black Bear 8170 10.7 6.3 170 9.2 7.4 124 Canyon 7870 3.3 1.8 183 4.3 3.5 123 Madison Plateau 7750 6.4 3.2 200 6.7 5.1 131 West Yellowstone 6700 2.5 1.1 227 4.1 3.1 132 Whiskey Creek 6800 -M 1.8 * 4.3 4.1 105 ----- ----- Basin Index (%) 185 123 YELLOWSTONE Beartooth Lake 9360 10.9 4.6 237 9.0 4.0 225 Burnt Mtn 5880 2.5 .1 2500* 4.9 4.3 114 Canyon 7870 3.3 1.8 183 4.3 3.5 123 Cole Creek 7850 4.5 3.5 129 3.2 4.2 76 Evening Star 9200 11.8 4.9 241 11.3 6.1 185 Fisher Creek 9100 14.2 5.9 241 11.5 6.6 174 Northeast Entrance 7350 2.5 .9 278* 4.5 3.1 145 Parker Peak 9400 10.7 4.5 238 8.0 4.3 186 Sylvan Lake 8420 8.0 3.6 222 7.7 5.3 145 Thumb Divide 7980 5.2 2.0 260 6.3 3.9 162 Two Ocean Plateau 9240 14.3 6.0 238 9.0 5.8 155 White Mill 8700 11.6 4.3 270 7.0 5.2 135 Wolverine 7650 3.8 1.0 380 5.3 3.1 171 ----- ----- Basin Index (%) 240 155 WIND RIVER Burroughs Creek 8750 4.5 -M * 4.6 -M * Castle Creek 8400 1.9 -M * 3.2 -M * Cold Springs 9630 2.4 1.8 133 3.0 2.9 103 Deer Park 9700 5.2 3.3 158 5.3 4.7 113 Hobbs Park 10100 7.0 3.5 200 5.5 3.6 153 Kirwin 9550 6.9 2.7 256 5.3 3.1 171 Little Warm 9370 6.1 2.2 277 5.5 3.2 172 Owl Creek 8975 1.0 1.3 77 2.5 1.9 132 South Pass 9040 3.9 2.8 139 3.2 4.1 78 St. Lawrence Alt 8620 1.4 1.5 93 3.5 2.6 135 Togwotee Pass 9580 10.0 5.0 200 9.2 5.3 174 Townsend Creek 8700 2.5 1.9 132 3.5 3.4 103 ----- ----- Basin Index (%) 178 134 BIGHORN BASIN Bald Mtn. 9380 5.5 4.4 125 3.3 4.2 79 Bear Trap Meadow 8200 1.8 1.0 180 3.2 2.6 123 Bone Springs Div 9350 3.8 4.1 93 3.3 4.0 82 Grave Springs 8550 1.5 1.4 107 1.7 3.1 55 Kirwin 9550 6.9 2.7 256 5.3 3.1 171 Marquette 8760 2.0 -M * 4.0 -M * Middle Powder 7760 2.0 1.9 105 1.6 3.6 44 Owl Creek 8975 1.0 1.3 77 2.5 1.9 132 Powder River Pass 9480 4.9 2.2 223 4.1 3.3 124 Shell Creek 9580 6.9 3.9 177 4.1 3.7 111 Timber Creek 7950 1.3 1.3 100 1.2 2.8 43 ----- ----- Basin Index (%) 147 94 SHOSHONE RIVER Blackwater 9780 12.6 4.7 268 9.5 4.9 194 Evening Star 9200 11.8 4.9 241 11.3 6.1 185 Marquette 8760 2.0 -M * 4.0 -M * Sylvan Road 7120 3.9 1.5 260 6.3 4.2 150 Younts Peak 8350 6.9 3.0 230 6.2 3.8 163 ----- ----- Basin Index (%) 250 175 POWDER RIVER Bear Trap Meadow 8200 1.8 1.0 180 3.2 2.6 123 Cloud Peak Reservoir 9860 3.1 3.1 100 4.1 4.0 102 Grave Springs 8550 1.5 1.4 107 1.7 3.1 55 Hansen Sawmill 8360 2.1 1.0 210 3.1 2.6 119 Middle Powder 7760 2.0 1.9 105 1.6 3.6 44 Powder River Pass 9480 4.9 2.2 223 4.1 3.3 124 Soldier Park 8720 1.3 -M * 3.2 -M * ----- ----- Basin Index (%) 145 93 TONGUE RIVER Big Goose 7990 1.3 1.7 76 1.9 3.3 58 Bone Springs Div 9350 3.8 4.1 93 3.3 4.0 82 Burgess Junction 7880 1.5 2.4 62 1.9 3.5 54 Dome Lake 8880 2.6 2.9 90 2.7 4.0 68 Little Goose 8870 1.6 -M * 3.0 -M * Sucker Creek 8880 1.8 2.6 69 -M 3.9 * Tie Creek 6870 .9 .6 150 2.2 3.6 61 ----- ----- Basin Index (%) 83 65 BELLE FOURCHE Cole Canyon 5910 .7 .4 175* 1.9 3.0 63 ----- ----- Basin Index (%) 175* 63 CHEYENNE RIVER BASIN Blind Park 6890 1.0 1.2 83 2.9 3.7 78 North Rapid Creek 6130 1.0 .9 111 1.8 3.2 56 ----- ----- Basin Index (%) 95 68 UPPER N. PLATTE Arapaho Ridge 10960 4.8 4.5 107 5.3 5.7 93 Blackhall Mtn 9820 6.2 -M * 6.7 -M * Columbine 9160 2.6 2.8 93 5.7 5.1 112 Divide Peak 8880 2.9 3.2 91 5.7 5.1 112 Joe Wright 10120 3.6 4.6 78 8.7 6.2 140 Laprele Creek 8375 1.2 1.8 67 2.4 3.3 73 Med Bow 10500 8.5 -M * 7.4 -M * North French Creek 10130 6.0 4.8 125 6.7 5.8 116 Never Summer 10280 5.6 4.1 137 5.5 -M * Old Battle 10000 5.9 5.7 104 5.6 7.4 76 Rawah 9020 2.4 1.7 141 5.3 4.1 129 Sage Creek Basin 7850 1.6 1.7 94 3.1 3.6 86 Sand Lake 10050 7.2 5.0 144 6.1 5.5 111 South Brush Creek 8440 2.8 1.6 175 4.0 3.8 105 Tower 10500 5.8 8.4 69 8.1 8.5 95 Webber Springs 9250 3.3 3.3 100 5.1 5.7 89 Willow Creek Pass 9540 4.6 2.6 177 4.7 3.5 134 Zirkel 9340 3.5 3.3 106 7.6 6.7 113 ----- ----- Basin Index (%) 108 105 SWEETWATER Deer Park 9700 5.2 3.3 158 5.3 4.7 113 Larsen Creek 9000 1.7 1.4 121 3.1 -M * South Pass 9040 3.9 2.8 139 3.2 4.1 78 ----- ----- Basin Index (%) 144 97 LOWER N. PLATTE Casper Mtn. 7900 1.8 2.7 67 1.8 4.4 41 Laprele Creek 8375 1.2 1.8 67 2.4 3.3 73 Reno Hill 8400 2.3 2.5 92 3.3 4.0 82 Windy Peak 7900 1.2 1.4 86 2.2 2.9 76 ----- ----- Basin Index (%) 77 66 LARAMIE RIVER Brooklyn Lake 10240 3.5 3.1 113 5.0 4.3 116 Cinnabar Park 9574 4.8 3.5 137 6.6 5.2 127 Crow Creek 8330 .8 1.0 80 3.7 2.9 128 Deadman Hill 10220 6.4 3.5 183 6.7 4.2 160 Rawah 9020 2.4 1.7 141 5.3 4.1 129 Roach 9700 4.2 2.7 156 6.0 4.3 140 ----- ----- Basin Index (%) 143 133 S. PLATTE Black Mountain 8920 2.8 -M * 4.9 -M * Crow Creek 8330 .8 1.0 80 3.7 2.9 128 Deadman Hill 10220 6.4 3.5 183 6.7 4.2 160 ----- ----- Basin Index (%) 160 146 LITTLE SNAKE RIVER Battle Mountain 7440 .6 .8 75* 2.3 3.5 66 Divide Peak 8880 2.9 3.2 91 5.7 5.1 112 Elk River 8700 2.4 1.6 150* 4.5 4.3 105 Little Snake River 8915 3.0 2.9 103 6.5 6.9 94 Old Battle 10000 5.9 5.7 104 5.6 7.4 76 Sage Creek Basin 7850 1.6 1.7 94 3.1 3.6 86 Sandstone RS 8150 1.6 1.1 145* 2.5 4.1 61 Whiskey Park 8950 2.9 3.4 85 5.7 5.5 104 ----- ----- Basin Index (%) 102 89 UPPER GREEN RIVER Big Sandy Opening 9080 2.8 2.9 97 3.4 3.1 110 Blind Bull Sum 8650 9.3 3.3 282 6.0 3.9 154 East Rim Divide 7930 2.6 1.3 200 3.3 2.5 132 Elkhart Park G.S. 9400 2.5 2.4 104 2.8 3.2 88 Gros Ventre Summit 8750 6.2 2.8 221 5.5 3.1 177 Gunsight Pass 9820 4.6 2.5 184 5.2 3.4 153 Kendall R.S. 7740 3.4 1.6 212 4.2 3.0 140 Loomis Park 8240 4.1 2.1 195 4.5 3.5 129 New Fork Lake 8340 2.2 1.6 138 1.6 2.6 62 Pocket Creek 9360 3.3 -M * 3.0 -M * Snider Basin 8060 2.2 1.6 138 3.3 2.9 114 Spring Creek Divide 9000 5.6 3.3 170 6.0 4.7 128 Triple Peak 8500 6.2 3.2 194 7.8 4.8 162 ----- ----- Basin Index (%) 181 132 LOWER GREEN RIVER Blacks Fork Jct 8869 1.6 -M * 2.3 -M * Buck Pasture 9632 2.6 -M * 3.0 -M * EF Blacks Fork GS 9360 1.8 -M * 2.5 -M * Hams Fork 7840 1.2 1.2 100 2.3 2.6 88 Hewinta 9500 1.2 1.3 92 2.7 3.5 77 Hickerson Park 9122 1.9 1.3 146 1.6 3.1 52 Hole-in-Rock 9168 1.4 1.1 127 1.8 3.0 60 Indian Creek 9425 4.9 4.2 117 4.0 4.4 91 Kelley R.S. 8180 2.7 2.0 135 3.2 3.6 89 Spirit Lk 10235 1.9 -M * 2.2 -M * Steel Creek Park 10158 3.7 3.0 123 3.6 4.1 88 ----- ----- Basin Index (%) 121 79 UPPER BEAR RIVER Bear River RS 8777 1.6 -M * 2.6 -M * Bug Lake 7987 3.2 2.2 145 4.5 4.0 112 Burts Miller Ranch 8000 1.4 -M * 1.6 -M * Chalk Creek #1 9171 3.6 3.5 103 4.2 5.6 75 Hayden Fork 9130 2.4 1.9 126 3.4 4.6 74 Kelley R.S. 8180 2.7 2.0 135 3.2 3.6 89 Lily Lake 9133 1.8 1.9 95 2.7 4.2 64 Monte Cristo 8932 5.2 2.8 186 4.9 5.2 94 Salt River Summit 7760 1.9 1.0 190* 3.2 3.2 100 ----- ----- Basin Index (%) 136 86 ----------------------------------------------------------------------------- -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.