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 THURSDAY: OCTOBER 11 , 2018 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 .3 .0 * .9 .6 150 Black Bear 8170 .8 .4 200* 2.5 1.2 208 Blind Bull Sum 8650 .0 .0 * 1.6 .7 229 Cottonwood Creek 7670 .1 .0 * 1.5 .8 188 East Rim Divide 7930 .0 .0 * 1.0 .4 250 Grand Targhee 9260 1.0 1.2 83* 2.0 2.0 100 Granite Creek 6770 .1 .0 * 1.3 .5 260 Grassy Lake 7265 .5 .0 * 1.4 1.1 127 Gros Ventre Summit 8750 .2 .0 * .8 .5 160 Gunsight Pass 9820 .0 .0 * 1.4 .8 175 Lewis Lake Divide 7850 .0 .0 * 1.5 .9 167 Phillips Bench 8200 .0 .0 * 1.8 .7 257 Salt River Summit 7640 .0 .0 * 1.6 .5 320 Snake River Station 6920 .2 .0 * 1.3 .8 162 Spring Creek Divide 9000 .1 .0 * 1.6 .6 267 Thumb Divide 7980 .0 .0 * 1.2 .8 150 Togwotee Pass 9580 .4 .5 80* 1.0 .8 125 Two Ocean Plateau 9240 .8 .8 100* 1.3 1.0 130 Willow Creek 8080 .1 .0 * 2.7 1.1 245 Younts Peak 8350 -M .3 * -M .8 * ----- ----- Basin Index (%) 159* 180 MADISON-GALLATIN Black Bear 8170 .8 .4 200* 2.5 1.2 208 Canyon 7870 .2 .0 * 1.2 .6 200 Madison Plateau 7750 .2 .2 100* 1.8 .9 200 West Yellowstone 6700 .2 .0 * 1.2 .7 171 Whiskey Creek 6800 .0 .0 * .5 .8 62 ----- ----- Basin Index (%) 233* 171 YELLOWSTONE Beartooth Lake 9360 .2 .8 25* .2 .7 29 Burnt Mtn 5880 .7 .0 * 1.2 1.7 71 Canyon 7870 .2 .0 * 1.2 .6 200 Cole Creek 7850 1.6 .8 200* 1.6 1.3 123 Evening Star 9200 .4 .6 67* 1.2 1.1 109 Fisher Creek 9100 .2 .5 40* 1.6 1.1 145 Northeast Entrance 7350 .1 .0 * .9 .7 129 Parker Peak 9400 .9 .8 112* 1.5 1.0 150 Sylvan Lake 8420 .8 .2 400* 2.0 1.1 182 Thumb Divide 7980 .0 .0 * 1.2 .8 150 Two Ocean Plateau 9240 .8 .8 100* 1.3 1.0 130 White Mill 8700 .1 .4 25* .6 .9 67 Wolverine 7650 .0 .0 * .7 .7 100 ----- ----- Basin Index (%) 122* 120 WIND RIVER Burroughs Creek 8750 .1 -M * .8 -M * Castle Creek 8400 .1 -M * .4 -M * Cold Springs 9630 .5 .0 * .6 .7 86 Deer Park 9700 .7 .4 175* 1.3 1.0 130 Hobbs Park 10100 .8 .3 267* 1.2 .8 150 Kirwin 9550 .4 .4 100* .5 .7 71 Little Warm 9370 .2 .1 200* .6 .6 100 Owl Creek 8975 .4 .0 * .7 .6 117 South Pass 9040 .5 .0 * 1.1 .7 157 St. Lawrence Alt 8620 .4 .0 * 1.3 .7 186 Togwotee Pass 9580 .4 .5 80* 1.0 .8 125 Townsend Creek 8700 .9 .0 * 1.3 .8 162 ----- ----- Basin Index (%) 306* 130 BIGHORN BASIN Bald Mtn. 9380 .5 1.3 38* .2 1.1 18 Bear Trap Meadow 8200 .2 .0 * .3 .7 43 Bone Springs Div 9350 .6 .9 67* .7 1.1 64 Grave Springs 8550 .5 .0 * .5 .9 56 Kirwin 9550 .4 .4 100* .5 .7 71 Marquette 8760 .2 -M * .5 -M * Middle Powder 7760 .2 .2 100* .2 .9 22 Owl Creek 8975 .4 .0 * .7 .6 117 Powder River Pass 9480 .4 .0 * .3 .8 38 Shell Creek 9580 .3 1.2 25* .4 1.0 40 Timber Creek 7950 .5 .0 * .8 .9 89 ----- ----- Basin Index (%) 100* 53 SHOSHONE RIVER Blackwater 9780 .9 .8 112* 1.6 1.0 160 Evening Star 9200 .4 .6 67* 1.2 1.1 109 Marquette 8760 .2 -M * .5 -M * Sylvan Road 7120 .3 .0 * .1 .8 12 Younts Peak 8350 -M .3 * -M .8 * ----- ----- Basin Index (%) 114* 100 POWDER RIVER Bear Trap Meadow 8200 .2 .0 * .3 .7 43 Cloud Peak Reservoir 9860 .7 .0 * .7 1.0 70 Grave Springs 8550 .5 .0 * .5 .9 56 Hansen Sawmill 8360 .4 .0 * .8 .7 114 Middle Powder 7760 .2 .2 100* .2 .9 22 Powder River Pass 9480 .4 .0 * .3 .8 38 Soldier Park 8720 .4 -M * .7 -M * ----- ----- Basin Index (%) 1200* 56 TONGUE RIVER Big Goose 7990 .5 .0 * 1.0 1.0 100 Bone Springs Div 9350 .6 .9 67* .7 1.1 64 Burgess Junction 7880 .4 .2 200* .6 1.0 60 Dome Lake 8880 .3 .4 75* .5 1.0 50 Little Goose 8870 .7 -M * .8 -M * Sucker Creek 8880 .6 .2 300* .6 1.0 60 Tie Creek 6870 .9 .0 * 1.5 1.1 136 ----- ----- Basin Index (%) 194* 79 BELLE FOURCHE Cole Canyon 5910 .3 .0 * .8 .9 89 ----- ----- Basin Index (%) * 89 CHEYENNE RIVER BASIN Blind Park 6890 .1 .0 * .3 .9 33 North Rapid Creek 6130 .0 .0 * .3 .8 38 ----- ----- Basin Index (%) * 35 UPPER N. PLATTE Arapaho Ridge 10960 1.2 .2 600* 2.6 1.0 260 Blackhall Mtn 9820 .6 -M * 2.8 -M * Columbine 9160 .6 .0 * 1.8 1.0 180 Divide Peak 8880 .9 .0 * 2.7 1.2 225 Joe Wright 10120 1.2 .0 * 3.0 1.1 273 Laprele Creek 8375 .1 .0 * .4 .7 57 Med Bow 10500 .2 -M * 2.2 -M * North French Creek 10130 .2 .3 67* 1.7 1.1 155 Never Summer 10280 1.3 .3 433* 2.6 -M * Old Battle 10000 1.5 .4 375* 3.5 1.5 233 Rawah 9020 .7 .0 * 2.1 .8 262 Sage Creek Basin 7850 .5 .0 * 2.2 .9 244 Sand Lake 10050 .3 .3 100* .6 1.1 55 South Brush Creek 8440 .1 .0 * .9 .8 112 Tower 10500 1.2 .6 200* 1.4 1.4 100 Webber Springs 9250 .7 .0 * 2.7 1.2 225 Willow Creek Pass 9540 1.0 .0 * 2.2 .6 367 Zirkel 9340 -M .0 * 2.6 1.6 162 ----- ----- Basin Index (%) 548* 190 SWEETWATER Deer Park 9700 .7 .4 175* 1.3 1.0 130 Larsen Creek 9000 .0 .0 * 1.2 -M * South Pass 9040 .5 .0 * 1.1 .7 157 ----- ----- Basin Index (%) 300* 141 LOWER N. PLATTE Casper Mtn. 7900 .5 .1 500* .7 .9 78 Laprele Creek 8375 .1 .0 * .4 .7 57 Reno Hill 8400 .4 .0 * .6 .9 67 Windy Peak 7900 .5 .0 * -M .7 * ----- ----- Basin Index (%) 1500* 68 LARAMIE RIVER Brooklyn Lake 10240 .5 .0 * 1.1 .7 157 Cinnabar Park 9574 .8 .0 * 1.9 .9 211 Crow Creek 8330 .0 .0 * .9 .6 150 Deadman Hill 10220 .7 .0 * 1.3 .7 186 Rawah 9020 .7 .0 * 2.1 .8 262 Roach 9700 .9 .0 * 1.7 .8 212 ----- ----- Basin Index (%) * 200 S. PLATTE Black Mountain 8920 .5 -M * 1.0 -M * Crow Creek 8330 .0 .0 * .9 .6 150 Deadman Hill 10220 .7 .0 * 1.3 .7 186 ----- ----- Basin Index (%) * 169 LITTLE SNAKE RIVER Battle Mountain 7440 .2 .0 * 2.3 .7 329 Divide Peak 8880 .9 .0 * 2.7 1.2 225 Elk River 8700 .7 .0 * 1.3 1.0 130 Little Snake River 8915 .3 .0 * 3.9 1.5 260 Old Battle 10000 1.5 .4 375* 3.5 1.5 233 Sage Creek Basin 7850 .5 .0 * 2.2 .9 244 Sandstone RS 8150 .3 .0 * 1.8 .8 225 Whiskey Park 8950 .8 .0 * 3.1 1.1 282 ----- ----- Basin Index (%) 1300* 239 UPPER GREEN RIVER Big Sandy Opening 9080 .3 .0 * 1.5 .6 250 Blind Bull Sum 8650 .0 .0 * 1.6 .7 229 East Rim Divide 7930 .0 .0 * 1.0 .4 250 Elkhart Park G.S. 9400 .7 .0 * 1.8 .6 300 Gros Ventre Summit 8750 .2 .0 * .8 .5 160 Gunsight Pass 9820 .0 .0 * 1.4 .8 175 Kendall R.S. 7740 .2 .0 * 1.2 .4 300 Loomis Park 8240 -M .0 * -M .5 * New Fork Lake 8340 .1 .0 * .7 .5 140 Pocket Creek 9360 .4 -M * 1.9 -M * Snyder Basin 8060 .0 .0 * 1.5 .4 375 Spring Creek Divide 9000 .1 .0 * 1.6 .6 267 Triple Peak 8500 .0 .0 * 1.7 .6 283 ----- ----- Basin Index (%) * 243 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 -M * 2.0 -M * Buck Pasture 9632 .5 -M * 2.7 -M * EF Blacks Fork GS 9360 .4 -M * 1.8 -M * Hams Fork 7840 .1 .0 * 1.5 .4 375 Hewinta 9500 .2 .0 * 2.1 .7 300 Hickerson Park 9122 1.6 .0 * 2.7 .7 386 Hole-in-Rock 9168 .3 .0 * 2.2 .7 314 Indian Creek 9425 .3 .0 * 1.2 .6 200 Kelley R.S. 8180 .8 .0 * 1.5 .5 300 Spirit Lk 10235 1.4 -M * 3.9 -M * Steel Creek Park 10158 .1 .0 * 2.2 .8 275 ----- ----- Basin Index (%) * 305 UPPER BEAR RIVER Bear River RS 8777 .1 -M * 2.2 -M * Bug Lake 7987 .9 .0 * 3.3 .7 471 Burts Miller Ranch 8000 .4 -M * 1.4 -M * Chalk Creek #1 9171 .9 .0 * 4.7 1.0 470 Hayden Fork 9130 .5 .0 * 3.5 .9 389 Kelley R.S. 8180 .8 .0 * 1.5 .5 300 Lily Lake 9133 .1 .0 * 2.4 .9 267 Monte Cristo 8932 1.5 .0 * 2.9 .8 362 Salt River Summit 7640 .0 .0 * 1.6 .5 320 ----- ----- Basin Index (%) * 375 ----------------------------------------------------------------------------- -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.