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 MONDAY: OCTOBER 15 , 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 * 1.1 .9 122 Black Bear 8170 1.0 1.0 100* 2.5 1.8 139 Blind Bull Sum 8650 .0 .2 0* 1.7 1.0 170 Cottonwood Creek 7670 .2 .0 * 1.6 1.2 133 East Rim Divide 7930 .0 .0 * 1.0 .6 167 Grand Targhee 9260 1.4 1.5 93* 2.2 2.7 81 Granite Creek 6770 .1 .0 * 1.4 .8 175 Grassy Lake 7265 .4 .0 * 1.5 1.6 94 Gros Ventre Summit 8750 .2 .6 33* .9 .8 112 Gunsight Pass 9820 .0 .0 * 1.6 1.1 145 Lewis Lake Divide 7850 .0 .0 * 1.6 1.4 114 Phillips Bench 8200 -M .0 * 1.9 1.1 173 Salt River Summit 7640 .0 .0 * 1.5 .8 188 Snake River Station 6920 .0 .0 * 1.4 1.2 117 Spring Creek Divide 9000 .1 .0 * 1.5 .9 167 Thumb Divide 7980 .0 .0 * 1.2 1.1 109 Togwotee Pass 9580 .5 1.2 42* 1.2 1.2 100 Two Ocean Plateau 9240 .8 1.3 62* 1.5 1.3 115 Willow Creek 8080 .0 .0 * 2.7 1.6 169 Younts Peak 8350 -M .4 * -M 1.0 * ----- ----- Basin Index (%) 84* 130 MADISON-GALLATIN Black Bear 8170 1.0 1.0 100* 2.5 1.8 139 Canyon 7870 .2 .0 * 1.3 1.0 130 Madison Plateau 7750 .4 .3 133* 1.8 1.3 138 West Yellowstone 6700 .1 .0 * 1.3 1.0 130 Whiskey Creek 6800 .0 .0 * .6 1.1 55 ----- ----- Basin Index (%) 131* 121 YELLOWSTONE Beartooth Lake 9360 .7 1.1 64* .6 1.0 60 Burnt Mtn 5880 1.4 .0 * 2.5 2.3 109 Canyon 7870 .2 .0 * 1.3 1.0 130 Cole Creek 7850 3.2 1.1 291* 3.0 1.6 188 Evening Star 9200 1.3 .9 144* 2.2 1.5 147 Fisher Creek 9100 .7 1.1 64* 1.9 1.6 119 Northeast Entrance 7350 .5 .0 * 1.1 .9 122 Parker Peak 9400 1.2 1.1 109* 2.2 1.4 157 Sylvan Lake 8420 1.6 .4 400* 2.9 1.6 181 Thumb Divide 7980 .0 .0 * 1.2 1.1 109 Two Ocean Plateau 9240 .8 1.3 62* 1.5 1.3 115 White Mill 8700 .4 .9 44* .8 1.3 62 Wolverine 7650 .0 .0 * .9 .9 100 ----- ----- Basin Index (%) 152* 126 WIND RIVER Burroughs Creek 8750 .0 -M * .4 -M * Castle Creek 8400 .1 -M * .5 -M * Cold Springs 9630 .8 .0 * .9 .9 100 Deer Park 9700 1.0 .6 167* 1.3 1.5 87 Hobbs Park 10100 1.0 .6 167* 1.4 1.0 140 Kirwin 9550 .5 .6 83* .6 .9 67 Little Warm 9370 .0 .2 0* .7 .9 78 Owl Creek 8975 .9 .0 * 1.0 .7 143 South Pass 9040 .7 .0 * 1.4 1.0 140 St. Lawrence Alt 8620 .5 .0 * 1.8 .8 225 Togwotee Pass 9580 .5 1.2 42* 1.2 1.2 100 Townsend Creek 8700 1.0 .0 * 1.6 1.0 160 ----- ----- Basin Index (%) 216* 120 BIGHORN BASIN Bald Mtn. 9380 1.3 1.6 81* -M 1.4 * Bear Trap Meadow 8200 .6 .0 * .8 .8 100 Bone Springs Div 9350 1.4 1.3 108* 1.3 1.4 93 Grave Springs 8550 .9 .0 * .9 1.2 75 Kirwin 9550 .5 .6 83* .6 .9 67 Marquette 8760 .3 -M * .8 -M * Middle Powder 7760 1.4 .3 467* 1.1 1.2 92 Owl Creek 8975 .9 .0 * 1.0 .7 143 Powder River Pass 9480 .9 .2 450* .8 1.1 73 Shell Creek 9580 1.5 1.5 100* 1.5 1.2 125 Timber Creek 7950 .7 .0 * 1.2 1.0 120 ----- ----- Basin Index (%) 184* 97 SHOSHONE RIVER Blackwater 9780 1.3 1.2 108* 2.1 1.4 150 Evening Star 9200 1.3 .9 144* 2.2 1.5 147 Marquette 8760 .3 -M * .8 -M * Sylvan Road 7120 .6 .0 * .9 1.1 82 Younts Peak 8350 -M .4 * -M 1.0 * ----- ----- Basin Index (%) 152* 130 POWDER RIVER Bear Trap Meadow 8200 .6 .0 * .8 .8 100 Cloud Peak Reservoir 9860 1.5 .5 300* 1.5 1.4 107 Grave Springs 8550 .9 .0 * .9 1.2 75 Hansen Sawmill 8360 1.2 .0 * 1.6 .9 178 Middle Powder 7760 1.4 .3 467* 1.1 1.2 92 Powder River Pass 9480 .9 .2 450* .8 1.1 73 Soldier Park 8720 1.1 -M * 1.4 -M * ----- ----- Basin Index (%) 650* 102 TONGUE RIVER Big Goose 7990 1.2 .2 600* 1.1 1.4 79 Bone Springs Div 9350 1.4 1.3 108* 1.3 1.4 93 Burgess Junction 7880 1.1 .4 275* 1.3 1.2 108 Dome Lake 8880 1.3 .7 186* 1.6 1.3 123 Little Goose 8870 1.8 -M * 1.5 -M * Sucker Creek 8880 1.5 .5 300* 1.3 1.3 100 Tie Creek 6870 1.4 .0 * .7 1.5 47 ----- ----- Basin Index (%) 255* 90 BELLE FOURCHE Cole Canyon 5910 .7 .0 * 1.6 1.2 133 ----- ----- Basin Index (%) * 133 CHEYENNE RIVER BASIN Blind Park 6890 .4 .0 * .6 1.1 55 North Rapid Creek 6130 .2 .0 * .7 1.0 70 ----- ----- Basin Index (%) * 62 UPPER N. PLATTE Arapaho Ridge 10960 1.7 .7 243* 3.1 1.5 207 Blackhall Mtn 9820 1.2 -M * 3.4 -M * Columbine 9160 .6 .0 * 1.9 1.3 146 Divide Peak 8880 .6 .0 * 3.0 1.6 188 Joe Wright 10120 1.9 .5 380* 4.2 1.6 262 Laprele Creek 8375 .5 .0 * 1.0 .9 111 Med Bow 10500 .6 -M * 3.0 -M * North French Creek 10130 .5 .6 83* 2.3 1.5 153 Never Summer 10280 1.8 .6 300* 3.2 -M * Old Battle 10000 1.9 .8 238* 3.8 2.0 190 Rawah 9020 1.2 .0 * 2.5 1.2 208 Sage Creek Basin 7850 -M .0 * 2.4 1.1 218 Sand Lake 10050 .7 .8 88* 1.0 1.5 67 South Brush Creek 8440 .3 .0 * 1.1 1.1 100 Tower 10500 2.6 1.0 260* 2.4 2.0 120 Webber Springs 9250 .8 .0 * -M 1.5 * Willow Creek Pass 9540 1.4 .1 1400* 2.6 .8 325 Zirkel 9340 .7 .0 * 3.2 2.1 152 ----- ----- Basin Index (%) 337* 171 SWEETWATER Deer Park 9700 1.0 .6 167* 1.3 1.5 87 Larsen Creek 9000 .0 .0 * 1.3 -M * South Pass 9040 .7 .0 * 1.4 1.0 140 ----- ----- Basin Index (%) 283* 108 LOWER N. PLATTE Casper Mtn. 7900 .8 .1 800* 1.0 1.2 83 Laprele Creek 8375 .5 .0 * 1.0 .9 111 Reno Hill 8400 .6 .0 * -M 1.1 * Windy Peak 7900 .5 .0 * .1 .8 12 ----- ----- Basin Index (%) 2400* 72 LARAMIE RIVER Brooklyn Lake 10240 .9 .0 * 1.8 1.0 180 Cinnabar Park 9574 1.3 .0 * 2.6 1.3 200 Crow Creek 8330 .3 .0 * 1.5 1.1 136 Deadman Hill 10220 1.2 .6 200* 1.9 1.1 173 Rawah 9020 1.2 .0 * 2.5 1.2 208 Roach 9700 1.2 .0 * 1.9 1.1 173 ----- ----- Basin Index (%) 1017* 179 S. PLATTE Black Mountain 8920 .6 -M * 1.4 -M * Crow Creek 8330 .3 .0 * 1.5 1.1 136 Deadman Hill 10220 1.2 .6 200* 1.9 1.1 173 ----- ----- Basin Index (%) 250* 155 LITTLE SNAKE RIVER Battle Mountain 7440 .2 .0 * 1.6 .9 178 Divide Peak 8880 .6 .0 * 3.0 1.6 188 Elk River 8700 .4 .0 * 1.7 1.3 131 Little Snake River 8915 .0 .0 * 4.4 2.1 210 Old Battle 10000 1.9 .8 238* 3.8 2.0 190 Sage Creek Basin 7850 -M .0 * 2.4 1.1 218 Sandstone RS 8150 .2 .0 * 2.0 1.0 200 Whiskey Park 8950 1.2 .0 * 3.8 1.4 271 ----- ----- Basin Index (%) 562* 199 UPPER GREEN RIVER Big Sandy Opening 9080 .3 .2 150* 1.5 .8 188 Blind Bull Sum 8650 .0 .2 0* 1.7 1.0 170 East Rim Divide 7930 .0 .0 * 1.0 .6 167 Elkhart Park G.S. 9400 .7 .0 * 1.9 .9 211 Gros Ventre Summit 8750 .2 .6 33* .9 .8 112 Gunsight Pass 9820 .0 .0 * 1.6 1.1 145 Kendall R.S. 7740 .0 .0 * 1.1 .6 183 Loomis Park 8240 -M .0 * -M .8 * New Fork Lake 8340 .0 .0 * .9 .6 150 Pocket Creek 9360 .5 -M * 2.1 -M * Snyder Basin 8060 .0 .0 * 1.4 .6 233 Spring Creek Divide 9000 .1 .0 * 1.5 .9 167 Triple Peak 8500 .3 .0 * 1.8 1.0 180 ----- ----- Basin Index (%) 160* 172 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 -M * 2.1 -M * Buck Pasture 9632 .0 -M * 3.1 -M * EF Blacks Fork GS 9360 .1 -M * 2.0 -M * Hams Fork 7840 .0 .0 * 1.5 .6 250 Hewinta 9500 .0 .0 * 2.1 .9 233 Hickerson Park 9122 1.5 .0 * 2.8 .8 350 Hole-in-Rock 9168 .2 .0 * 2.4 .9 267 Indian Creek 9425 .2 .5 40* 1.2 1.0 120 Kelley R.S. 8180 .6 .0 * 1.5 .8 188 Spirit Lk 10235 1.4 -M * 4.2 -M * Steel Creek Park 10158 .0 .4 0* 2.4 1.1 218 ----- ----- Basin Index (%) 278* 228 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 2.4 -M * Bug Lake 7987 .8 .0 * 3.4 1.1 309 Burts Miller Ranch 8000 .1 -M * 1.4 -M * Chalk Creek #1 9171 .7 .0 * 5.1 1.4 364 Hayden Fork 9130 .0 .0 * 3.5 1.1 318 Kelley R.S. 8180 .6 .0 * 1.5 .8 188 Lily Lake 9133 .0 .0 * 2.6 1.1 236 Monte Cristo 8932 1.5 .0 * 3.1 1.3 238 Salt River Summit 7640 .0 .0 * 1.5 .8 188 ----- ----- Basin Index (%) * 272 ----------------------------------------------------------------------------- -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.