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: OCTOBER 13 , 2018 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 .1 .0 * 1.1 .7 157 Black Bear 8170 1.0 .7 143* 2.8 1.5 187 Blind Bull Sum 8650 .0 .1 0* 1.6 .8 200 Cottonwood Creek 7670 .0 .0 * 1.5 1.0 150 East Rim Divide 7930 .0 .0 * 1.0 .5 200 Grand Targhee 9260 1.3 1.2 108* 2.3 2.4 96 Granite Creek 6770 .0 .0 * 1.4 .6 233 Grassy Lake 7265 .4 .0 * 1.4 1.3 108 Gros Ventre Summit 8750 .1 .3 33* .9 .7 129 Gunsight Pass 9820 .0 .0 * 1.5 .9 167 Lewis Lake Divide 7850 .0 .0 * 1.6 1.1 145 Phillips Bench 8200 .0 .0 * 1.8 .8 225 Salt River Summit 7640 .0 .0 * 1.6 .7 229 Snake River Station 6920 .0 .0 * 1.3 1.0 130 Spring Creek Divide 9000 .3 .0 * 1.7 .7 243 Thumb Divide 7980 .0 .0 * 1.2 1.0 120 Togwotee Pass 9580 .5 .9 56* 1.1 .9 122 Two Ocean Plateau 9240 .8 1.1 73* 1.4 1.1 127 Willow Creek 8080 .0 .0 * 2.7 1.3 208 Younts Peak 8350 -M .4 * -M .9 * ----- ----- Basin Index (%) 105* 157 MADISON-GALLATIN Black Bear 8170 1.0 .7 143* 2.8 1.5 187 Canyon 7870 .2 .0 * 1.3 .8 162 Madison Plateau 7750 .3 .3 100* 1.9 1.1 173 West Yellowstone 6700 .1 .0 * 1.3 .9 144 Whiskey Creek 6800 .1 .0 * .8 1.0 80 ----- ----- Basin Index (%) 170* 153 YELLOWSTONE Beartooth Lake 9360 .4 1.0 40* .4 .9 44 Burnt Mtn 5880 .6 .0 * 1.5 2.2 68 Canyon 7870 .2 .0 * 1.3 .8 162 Cole Creek 7850 1.8 .9 200* 1.4 1.5 93 Evening Star 9200 .7 .7 100* 1.5 1.2 125 Fisher Creek 9100 .4 .8 50* 1.7 1.3 131 Northeast Entrance 7350 .1 .0 * .9 .8 112 Parker Peak 9400 1.1 .9 122* 1.8 1.2 150 Sylvan Lake 8420 1.3 .3 433* 2.7 1.2 225 Thumb Divide 7980 .0 .0 * 1.2 1.0 120 Two Ocean Plateau 9240 .8 1.1 73* 1.4 1.1 127 White Mill 8700 .2 .7 29* .8 1.1 73 Wolverine 7650 .0 .0 * .8 .8 100 ----- ----- Basin Index (%) 119* 115 WIND RIVER Burroughs Creek 8750 .0 -M * 1.0 -M * Castle Creek 8400 .0 -M * .4 -M * Cold Springs 9630 .7 .0 * .9 .8 112 Deer Park 9700 .8 .5 160* 1.5 1.3 115 Hobbs Park 10100 1.1 .5 220* 1.5 .9 167 Kirwin 9550 .5 .5 100* .6 .8 75 Little Warm 9370 .1 .1 100* 1.1 .7 157 Owl Creek 8975 .6 .0 * .8 .6 133 South Pass 9040 .7 .0 * 1.4 .9 156 St. Lawrence Alt 8620 .5 .0 * 1.4 .8 175 Togwotee Pass 9580 .5 .9 56* 1.1 .9 122 Townsend Creek 8700 .9 .0 * 1.5 .9 167 ----- ----- Basin Index (%) 256* 137 BIGHORN BASIN Bald Mtn. 9380 .7 1.4 50* .7 1.2 58 Bear Trap Meadow 8200 .5 .0 * .7 .7 100 Bone Springs Div 9350 .5 1.1 45* .9 1.2 75 Grave Springs 8550 .6 .0 * 1.1 1.1 100 Kirwin 9550 .5 .5 100* .6 .8 75 Marquette 8760 .3 -M * .7 -M * Middle Powder 7760 .4 .2 200* .5 1.1 45 Owl Creek 8975 .6 .0 * .8 .6 133 Powder River Pass 9480 .5 .1 500* .6 .9 67 Shell Creek 9580 .6 1.3 46* .7 1.1 64 Timber Creek 7950 .5 .0 * .9 1.0 90 ----- ----- Basin Index (%) 117* 77 SHOSHONE RIVER Blackwater 9780 1.0 1.0 100* 1.8 1.2 150 Evening Star 9200 .7 .7 100* 1.5 1.2 125 Marquette 8760 .3 -M * .7 -M * Sylvan Road 7120 .4 .0 * .5 .9 56 Younts Peak 8350 -M .4 * -M .9 * ----- ----- Basin Index (%) 124* 115 POWDER RIVER Bear Trap Meadow 8200 .5 .0 * .7 .7 100 Cloud Peak Reservoir 9860 1.0 .2 500* 1.3 1.2 108 Grave Springs 8550 .6 .0 * 1.1 1.1 100 Hansen Sawmill 8360 .7 .0 * 1.0 .8 125 Middle Powder 7760 .4 .2 200* .5 1.1 45 Powder River Pass 9480 .5 .1 500* .6 .9 67 Soldier Park 8720 .8 -M * 1.0 -M * ----- ----- Basin Index (%) 740* 90 TONGUE RIVER Big Goose 7990 .7 .2 350* 1.2 1.2 100 Bone Springs Div 9350 .5 1.1 45* .9 1.2 75 Burgess Junction 7880 .5 .3 167* 1.0 1.1 91 Dome Lake 8880 .7 .5 140* .9 1.2 75 Little Goose 8870 .9 -M * .9 -M * Sucker Creek 8880 .8 .3 267* 1.2 1.2 100 Tie Creek 6870 1.2 .0 * 1.8 1.4 129 ----- ----- Basin Index (%) 183* 96 BELLE FOURCHE Cole Canyon 5910 .4 .0 * 1.2 1.1 109 ----- ----- Basin Index (%) * 109 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * .6 1.0 60 North Rapid Creek 6130 .0 .0 * .4 .9 44 ----- ----- Basin Index (%) * 53 UPPER N. PLATTE Arapaho Ridge 10960 1.6 .4 400* 3.0 1.2 250 Blackhall Mtn 9820 .9 -M * 3.1 -M * Columbine 9160 .8 .0 * 2.4 1.1 218 Divide Peak 8880 1.0 .0 * 2.8 1.4 200 Joe Wright 10120 1.6 .4 400* 3.6 1.4 257 Laprele Creek 8375 .6 .0 * .9 .8 112 Med Bow 10500 .2 -M * 2.4 -M * North French Creek 10130 .0 .5 0* 1.7 1.3 131 Never Summer 10280 1.7 .5 340* 3.1 -M * Old Battle 10000 1.8 .6 300* 3.9 1.7 229 Rawah 9020 1.0 .0 * 2.4 1.0 240 Sage Creek Basin 7850 .2 .0 * 2.3 1.0 230 Sand Lake 10050 .4 .6 67* .8 1.3 62 South Brush Creek 8440 .0 .0 * .9 1.0 90 Tower 10500 2.2 .9 244* 2.5 1.7 147 Webber Springs 9250 .8 .0 * 3.2 1.3 246 Willow Creek Pass 9540 1.3 .0 * 2.5 .7 357 Zirkel 9340 .8 .0 * 3.0 1.9 158 ----- ----- Basin Index (%) 405* 191 SWEETWATER Deer Park 9700 .8 .5 160* 1.5 1.3 115 Larsen Creek 9000 .0 .0 * 1.3 -M * South Pass 9040 .7 .0 * 1.4 .9 156 ----- ----- Basin Index (%) 300* 132 LOWER N. PLATTE Casper Mtn. 7900 .5 .1 500* .9 1.1 82 Laprele Creek 8375 .6 .0 * .9 .8 112 Reno Hill 8400 .8 .0 * 1.0 1.0 100 Windy Peak 7900 .7 .0 * .2 .8 25 ----- ----- Basin Index (%) 2600* 81 LARAMIE RIVER Brooklyn Lake 10240 .7 .0 * 1.2 .9 133 Cinnabar Park 9574 1.0 .0 * 2.2 1.2 183 Crow Creek 8330 .1 .0 * 1.0 .8 125 Deadman Hill 10220 1.0 .3 333* 1.6 1.0 160 Rawah 9020 1.0 .0 * 2.4 1.0 240 Roach 9700 1.2 .0 * 2.0 .9 222 ----- ----- Basin Index (%) 1667* 179 S. PLATTE Black Mountain 8920 .6 -M * 1.1 -M * Crow Creek 8330 .1 .0 * 1.0 .8 125 Deadman Hill 10220 1.0 .3 333* 1.6 1.0 160 ----- ----- Basin Index (%) 367* 144 LITTLE SNAKE RIVER Battle Mountain 7440 .2 .0 * 2.0 .8 250 Divide Peak 8880 1.0 .0 * 2.8 1.4 200 Elk River 8700 .6 .0 * 1.4 1.1 127 Little Snake River 8915 .2 .0 * 4.3 1.8 239 Old Battle 10000 1.8 .6 300* 3.9 1.7 229 Sage Creek Basin 7850 .2 .0 * 2.3 1.0 230 Sandstone RS 8150 .1 .0 * 1.9 .9 211 Whiskey Park 8950 1.0 .0 * 3.3 1.2 275 ----- ----- Basin Index (%) 850* 221 UPPER GREEN RIVER Big Sandy Opening 9080 .3 .0 * 1.5 .7 214 Blind Bull Sum 8650 .0 .1 0* 1.6 .8 200 East Rim Divide 7930 .0 .0 * 1.0 .5 200 Elkhart Park G.S. 9400 .8 .0 * 1.9 .8 238 Gros Ventre Summit 8750 .1 .3 33* .9 .7 129 Gunsight Pass 9820 .0 .0 * 1.5 .9 167 Kendall R.S. 7740 .1 .0 * 1.2 .5 240 Loomis Park 8240 -M .0 * -M .7 * New Fork Lake 8340 .0 .0 * .9 .5 180 Pocket Creek 9360 .5 -M * 2.1 -M * Snyder Basin 8060 .0 .0 * 1.5 .5 300 Spring Creek Divide 9000 .3 .0 * 1.7 .7 243 Triple Peak 8500 .0 .0 * 1.8 .8 225 ----- ----- Basin Index (%) 400* 209 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 -M * 2.0 -M * Buck Pasture 9632 .1 -M * 2.9 -M * EF Blacks Fork GS 9360 .4 -M * 1.9 -M * Hams Fork 7840 .0 .0 * 1.5 .5 300 Hewinta 9500 .0 .0 * 2.1 .9 233 Hickerson Park 9122 1.5 .0 * 2.8 .7 400 Hole-in-Rock 9168 .1 .0 * 2.4 .8 300 Indian Creek 9425 .3 .4 75* 1.3 .8 162 Kelley R.S. 8180 .7 .0 * 1.5 .7 214 Spirit Lk 10235 1.5 -M * 4.1 -M * Steel Creek Park 10158 .1 .3 33* 2.3 1.0 230 ----- ----- Basin Index (%) 386* 257 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 2.2 -M * Bug Lake 7987 .8 .0 * 3.3 .9 367 Burts Miller Ranch 8000 .3 -M * 1.3 -M * Chalk Creek #1 9171 .7 .0 * 4.9 1.2 408 Hayden Fork 9130 .1 .0 * 3.5 1.0 350 Kelley R.S. 8180 .7 .0 * 1.5 .7 214 Lily Lake 9133 .0 .0 * 2.4 1.0 240 Monte Cristo 8932 1.5 .0 * 2.9 1.0 290 Salt River Summit 7640 .0 .0 * 1.6 .7 229 ----- ----- Basin Index (%) * 309 ----------------------------------------------------------------------------- -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.