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: OCTOBER 16 , 2018 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 .2 .0 * 1.3 1.0 130 Black Bear 8170 1.1 1.1 100* 2.7 1.8 150 Blind Bull Sum 8650 .0 .2 0* 1.7 1.0 170 Cottonwood Creek 7670 .2 .0 * 1.6 1.3 123 East Rim Divide 7930 .0 .0 * 1.1 .7 157 Grand Targhee 9260 1.5 1.6 94* 2.5 2.7 93 Granite Creek 6770 .2 .0 * 1.5 .9 167 Grassy Lake 7265 .5 .0 * 1.9 1.7 112 Gros Ventre Summit 8750 .3 .6 50* 1.2 .9 133 Gunsight Pass 9820 .1 .1 100* 1.7 1.2 142 Lewis Lake Divide 7850 .0 .0 * 1.7 1.5 113 Phillips Bench 8200 .0 .0 * 2.0 1.1 182 Salt River Summit 7640 .0 .0 * 1.7 .9 189 Snake River Station 6920 .0 .0 * 1.5 1.3 115 Spring Creek Divide 9000 .4 .1 400* 1.8 1.0 180 Thumb Divide 7980 .0 .0 * 1.3 1.2 108 Togwotee Pass 9580 .6 1.3 46* 1.2 1.3 92 Two Ocean Plateau 9240 1.1 1.5 73* 1.6 1.4 114 Willow Creek 8080 .0 .0 * 2.9 1.8 161 Younts Peak 8350 -M .5 * -M 1.1 * ----- ----- Basin Index (%) 95* 133 MADISON-GALLATIN Black Bear 8170 1.1 1.1 100* 2.7 1.8 150 Canyon 7870 .4 .1 400* 1.7 1.0 170 Madison Plateau 7750 .5 .4 125* 2.1 1.4 150 West Yellowstone 6700 .1 .0 * 1.4 1.0 140 Whiskey Creek 6800 -M .0 * -M 1.2 * ----- ----- Basin Index (%) 131* 152 YELLOWSTONE Beartooth Lake 9360 .8 1.2 67* .8 1.1 73 Burnt Mtn 5880 1.4 .0 * 2.7 2.4 112 Canyon 7870 .4 .1 400* 1.7 1.0 170 Cole Creek 7850 3.2 1.2 267* 2.7 1.8 150 Evening Star 9200 1.4 1.0 140* 2.3 1.6 144 Fisher Creek 9100 .9 1.2 75* 2.1 1.7 124 Northeast Entrance 7350 .5 .0 * 1.2 1.0 120 Parker Peak 9400 1.5 1.1 136* 2.3 1.5 153 Sylvan Lake 8420 1.6 .5 320* 2.9 1.6 181 Thumb Divide 7980 .0 .0 * 1.3 1.2 108 Two Ocean Plateau 9240 1.1 1.5 73* 1.6 1.4 114 White Mill 8700 .5 1.0 50* 1.0 1.4 71 Wolverine 7650 .0 .0 * 1.1 1.0 110 ----- ----- Basin Index (%) 151* 127 WIND RIVER Burroughs Creek 8750 .0 -M * .9 -M * Castle Creek 8400 .3 -M * .7 -M * Cold Springs 9630 .9 .0 * 1.2 1.0 120 Deer Park 9700 1.0 .6 167* 1.6 1.5 107 Hobbs Park 10100 1.2 .7 171* 1.7 1.1 155 Kirwin 9550 .7 .7 100* .9 1.0 90 Little Warm 9370 .1 .2 50* 1.5 1.0 150 Owl Creek 8975 1.1 .1 1100* 1.2 .7 171 South Pass 9040 .9 .0 * 1.7 1.0 170 St. Lawrence Alt 8620 .7 .0 * 1.9 .9 211 Togwotee Pass 9580 .6 1.3 46* 1.2 1.3 92 Townsend Creek 8700 1.2 .0 * 1.8 1.1 164 ----- ----- Basin Index (%) 233* 139 BIGHORN BASIN Bald Mtn. 9380 1.4 1.7 82* 1.2 1.5 80 Bear Trap Meadow 8200 .8 .1 800* 1.1 .9 122 Bone Springs Div 9350 1.5 1.3 115* 1.7 1.4 121 Grave Springs 8550 1.0 .0 * 1.7 1.2 142 Kirwin 9550 .7 .7 100* .9 1.0 90 Marquette 8760 .5 -M * 1.0 -M * Middle Powder 7760 1.5 .3 500* 1.5 1.3 115 Owl Creek 8975 1.1 .1 1100* 1.2 .7 171 Powder River Pass 9480 .9 .3 300* 1.2 1.2 100 Shell Creek 9580 1.7 1.6 106* 2.0 1.3 154 Timber Creek 7950 .8 .0 * 1.1 1.2 92 ----- ----- Basin Index (%) 187* 116 SHOSHONE RIVER Blackwater 9780 1.5 1.3 115* 2.2 1.5 147 Evening Star 9200 1.4 1.0 140* 2.3 1.6 144 Marquette 8760 .5 -M * 1.0 -M * Sylvan Road 7120 .7 .0 * 1.0 1.2 83 Younts Peak 8350 -M .5 * -M 1.1 * ----- ----- Basin Index (%) 157* 128 POWDER RIVER Bear Trap Meadow 8200 .8 .1 800* 1.1 .9 122 Cloud Peak Reservoir 9860 1.7 .6 283* 2.0 1.5 133 Grave Springs 8550 1.0 .0 * 1.7 1.2 142 Hansen Sawmill 8360 1.4 .0 * 1.8 1.0 180 Middle Powder 7760 1.5 .3 500* 1.5 1.3 115 Powder River Pass 9480 .9 .3 300* 1.2 1.2 100 Soldier Park 8720 1.3 -M * 1.6 -M * ----- ----- Basin Index (%) 562* 131 TONGUE RIVER Big Goose 7990 1.4 .3 467* 2.2 1.5 147 Bone Springs Div 9350 1.5 1.3 115* 1.7 1.4 121 Burgess Junction 7880 1.2 .4 300* 1.7 1.3 131 Dome Lake 8880 1.5 .7 214* 2.1 1.5 140 Little Goose 8870 2.0 -M * 1.6 -M * Sucker Creek 8880 1.6 .6 267* 1.9 1.4 136 Tie Creek 6870 1.7 .0 * 2.6 1.6 162 ----- ----- Basin Index (%) 270* 140 BELLE FOURCHE Cole Canyon 5910 .8 .0 * 1.6 1.2 133 ----- ----- Basin Index (%) * 133 CHEYENNE RIVER BASIN Blind Park 6890 .6 .0 * 1.0 1.2 83 North Rapid Creek 6130 .3 .0 * .8 1.0 80 ----- ----- Basin Index (%) * 82 UPPER N. PLATTE Arapaho Ridge 10960 1.8 .8 225* 3.2 1.6 200 Blackhall Mtn 9820 1.2 -M * 3.5 -M * Columbine 9160 .7 .0 * 2.8 1.4 200 Divide Peak 8880 .8 .3 267* 3.0 1.6 188 Joe Wright 10120 1.9 .6 317* 4.3 1.8 239 Laprele Creek 8375 .6 .0 * 1.2 .9 133 Med Bow 10500 .8 -M * 3.1 -M * North French Creek 10130 .5 .7 71* 2.4 1.6 150 Never Summer 10280 1.8 .6 300* 3.3 -M * Old Battle 10000 2.0 .9 222* 4.2 2.1 200 Rawah 9020 1.2 .0 * 2.6 1.2 217 Sage Creek Basin 7850 .0 .0 * 2.4 1.1 218 Sand Lake 10050 .8 .9 89* 1.3 1.6 81 South Brush Creek 8440 .3 .0 * 1.3 1.2 108 Tower 10500 2.6 1.1 236* 2.9 2.1 138 Webber Springs 9250 1.0 .0 * 3.3 1.6 206 Willow Creek Pass 9540 1.4 .2 700* 2.6 .9 289 Zirkel 9340 .9 .0 * 3.2 2.2 145 ----- ----- Basin Index (%) 300* 178 SWEETWATER Deer Park 9700 1.0 .6 167* 1.6 1.5 107 Larsen Creek 9000 .0 .0 * 1.5 -M * South Pass 9040 .9 .0 * 1.7 1.0 170 ----- ----- Basin Index (%) 317* 132 LOWER N. PLATTE Casper Mtn. 7900 .8 .1 800* 1.3 1.3 100 Laprele Creek 8375 .6 .0 * 1.2 .9 133 Reno Hill 8400 .9 .2 450* 1.2 1.2 100 Windy Peak 7900 .8 .0 * .4 .9 44 ----- ----- Basin Index (%) 1033* 95 LARAMIE RIVER Brooklyn Lake 10240 1.1 .0 * 1.9 1.2 158 Cinnabar Park 9574 1.4 .0 * 2.8 1.4 200 Crow Creek 8330 .4 .0 * 1.6 1.1 145 Deadman Hill 10220 1.3 .7 186* 2.1 1.3 162 Rawah 9020 1.2 .0 * 2.6 1.2 217 Roach 9700 1.3 .0 * 2.2 1.2 183 ----- ----- Basin Index (%) 957* 178 S. PLATTE Black Mountain 8920 .7 -M * 1.4 -M * Crow Creek 8330 .4 .0 * 1.6 1.1 145 Deadman Hill 10220 1.3 .7 186* 2.1 1.3 162 ----- ----- Basin Index (%) 243* 154 LITTLE SNAKE RIVER Battle Mountain 7440 .2 .0 * 1.1 .9 122 Divide Peak 8880 .8 .3 267* 3.0 1.6 188 Elk River 8700 .3 .0 * 1.8 1.3 138 Little Snake River 8915 .0 .0 * 4.6 2.1 219 Old Battle 10000 2.0 .9 222* 4.2 2.1 200 Sage Creek Basin 7850 .0 .0 * 2.4 1.1 218 Sandstone RS 8150 .2 .0 * 2.1 1.0 210 Whiskey Park 8950 1.3 .0 * 3.8 1.4 271 ----- ----- Basin Index (%) 400* 200 UPPER GREEN RIVER Big Sandy Opening 9080 .4 .3 133* 1.6 .9 178 Blind Bull Sum 8650 .0 .2 0* 1.7 1.0 170 East Rim Divide 7930 .0 .0 * 1.1 .7 157 Elkhart Park G.S. 9400 .9 .2 450* 2.1 1.0 210 Gros Ventre Summit 8750 .3 .6 50* 1.2 .9 133 Gunsight Pass 9820 .1 .1 100* 1.7 1.2 142 Kendall R.S. 7740 .2 .0 * 1.2 .7 171 Loomis Park 8240 -M .0 * -M .9 * New Fork Lake 8340 .0 .0 * 1.1 .7 157 Pocket Creek 9360 .7 -M * 2.2 -M * Snyder Basin 8060 .0 .0 * 1.5 .7 214 Spring Creek Divide 9000 .4 .1 400* 1.8 1.0 180 Triple Peak 8500 .4 .0 * 1.9 1.0 190 ----- ----- Basin Index (%) 180* 172 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 -M * 2.1 -M * Buck Pasture 9632 .1 -M * 3.1 -M * EF Blacks Fork GS 9360 .2 -M * 2.2 -M * Hams Fork 7840 .0 .0 * 1.5 .6 250 Hewinta 9500 .0 .0 * 2.2 1.0 220 Hickerson Park 9122 1.6 .0 * 3.1 .8 388 Hole-in-Rock 9168 .3 .0 * 2.6 .9 289 Indian Creek 9425 .4 .6 67* 1.5 1.0 150 Kelley R.S. 8180 .8 .0 * 1.6 .8 200 Spirit Lk 10235 1.5 -M * 4.3 -M * Steel Creek Park 10158 .4 .5 80* 2.5 1.2 208 ----- ----- Basin Index (%) 318* 238 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 2.4 -M * Bug Lake 7987 .7 .0 * 3.5 1.2 292 Burts Miller Ranch 8000 .0 -M * 1.4 -M * Chalk Creek #1 9171 .9 .0 * 5.1 1.5 340 Hayden Fork 9130 .1 .0 * 3.6 1.2 300 Kelley R.S. 8180 .8 .0 * 1.6 .8 200 Lily Lake 9133 .0 .0 * 2.5 1.2 208 Monte Cristo 8932 1.6 .0 * 3.0 1.4 214 Salt River Summit 7640 .0 .0 * 1.7 .9 189 ----- ----- Basin Index (%) * 256 ----------------------------------------------------------------------------- -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.