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 18 , 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 * 1.3 1.1 118 Black Bear 8170 1.1 1.3 85* 2.9 2.0 145 Blind Bull Sum 8650 .0 .3 0* 1.6 1.1 145 Cottonwood Creek 7670 .2 .0 * 1.7 1.4 121 East Rim Divide 7930 .0 .0 * 1.2 .7 171 Grand Targhee 9260 1.6 2.3 70* 2.6 3.3 79 Granite Creek 6770 .2 .0 * 1.5 1.0 150 Grassy Lake 7265 .3 .0 * 2.2 1.8 122 Gros Ventre Summit 8750 .2 .8 25* 1.1 .9 122 Gunsight Pass 9820 .0 .3 0* 1.7 1.2 142 Lewis Lake Divide 7850 .0 .0 * 1.6 1.6 100 Phillips Bench 8200 .0 .0 * 2.0 1.2 167 Salt River Summit 7640 .0 .0 * 1.8 .9 200 Snake River Station 6920 .0 .0 * 1.5 1.4 107 Spring Creek Divide 9000 .5 .3 167* 1.9 1.1 173 Thumb Divide 7980 .0 .0 * 1.3 1.3 100 Togwotee Pass 9580 .8 1.6 50* 1.2 1.4 86 Two Ocean Plateau 9240 1.7 1.7 100* 1.7 1.6 106 Willow Creek 8080 .0 .0 * 2.9 1.9 153 Younts Peak 8350 -M .5 * -M 1.3 * ----- ----- Basin Index (%) 78* 125 MADISON-GALLATIN Black Bear 8170 1.1 1.3 85* 2.9 2.0 145 Canyon 7870 .5 .2 250* 1.8 1.1 164 Madison Plateau 7750 .5 .5 100* 2.1 1.5 140 West Yellowstone 6700 .1 .0 * 1.4 1.0 140 Whiskey Creek 6800 .1 .0 * .9 1.3 69 ----- ----- Basin Index (%) 115* 132 YELLOWSTONE Beartooth Lake 9360 .9 1.4 64* .9 1.3 69 Burnt Mtn 5880 1.3 .0 * 2.5 2.5 100 Canyon 7870 .5 .2 250* 1.8 1.1 164 Cole Creek 7850 3.2 1.4 229* 2.6 2.1 124 Evening Star 9200 1.5 1.1 136* 2.4 1.8 133 Fisher Creek 9100 1.0 1.3 77* 2.2 2.0 110 Northeast Entrance 7350 .1 .0 * 1.2 1.0 120 Parker Peak 9400 1.7 1.3 131* 2.4 1.6 150 Sylvan Lake 8420 1.5 .6 250* 3.0 1.8 167 Thumb Divide 7980 .0 .0 * 1.3 1.3 100 Two Ocean Plateau 9240 1.7 1.7 100* 1.7 1.6 106 White Mill 8700 .6 1.0 60* 1.2 1.6 75 Wolverine 7650 .0 .0 * 1.1 1.2 92 ----- ----- Basin Index (%) 140* 116 WIND RIVER Burroughs Creek 8750 .0 -M * .9 -M * Castle Creek 8400 .2 -M * .8 -M * Cold Springs 9630 1.0 .0 * 1.2 1.1 109 Deer Park 9700 1.1 .7 157* 1.8 1.6 112 Hobbs Park 10100 1.3 .8 162* 1.7 1.3 131 Kirwin 9550 .7 .8 88* 1.0 1.1 91 Little Warm 9370 .2 .3 67* 1.4 1.1 127 Owl Creek 8975 1.2 .2 600* 1.2 .8 150 South Pass 9040 .9 .1 900* 1.7 1.2 142 St. Lawrence Alt 8620 .8 .0 * 1.9 1.0 190 Togwotee Pass 9580 .8 1.6 50* 1.2 1.4 86 Townsend Creek 8700 1.2 .0 * 1.8 1.4 129 ----- ----- Basin Index (%) 204* 124 BIGHORN BASIN Bald Mtn. 9380 1.4 1.9 74* 1.4 1.7 82 Bear Trap Meadow 8200 .9 .2 450* 1.4 1.1 127 Bone Springs Div 9350 1.5 1.4 107* 1.7 1.7 100 Grave Springs 8550 1.1 .1 1100* 1.6 1.5 107 Kirwin 9550 .7 .8 88* 1.0 1.1 91 Marquette 8760 .5 -M * 1.0 -M * Middle Powder 7760 1.4 .4 350* 1.6 1.6 100 Owl Creek 8975 1.2 .2 600* 1.2 .8 150 Powder River Pass 9480 .9 .4 225* 1.3 1.4 93 Shell Creek 9580 1.8 1.8 100 2.0 1.5 133 Timber Creek 7950 .8 .0 * 1.2 1.4 86 ----- ----- Basin Index (%) 162* 104 SHOSHONE RIVER Blackwater 9780 1.5 1.5 100* 2.3 1.7 135 Evening Star 9200 1.5 1.1 136* 2.4 1.8 133 Marquette 8760 .5 -M * 1.0 -M * Sylvan Road 7120 .2 .0 * 1.0 1.4 71 Younts Peak 8350 -M .5 * -M 1.3 * ----- ----- Basin Index (%) 123* 116 POWDER RIVER Bear Trap Meadow 8200 .9 .2 450* 1.4 1.1 127 Cloud Peak Reservoir 9860 1.8 .8 225* 1.8 1.8 100 Grave Springs 8550 1.1 .1 1100* 1.6 1.5 107 Hansen Sawmill 8360 1.4 .0 * 1.8 1.2 150 Middle Powder 7760 1.4 .4 350* 1.6 1.6 100 Powder River Pass 9480 .9 .4 225* 1.3 1.4 93 Soldier Park 8720 1.2 -M * 1.6 -M * ----- ----- Basin Index (%) 395* 110 TONGUE RIVER Big Goose 7990 1.4 .4 350* 2.1 1.7 124 Bone Springs Div 9350 1.5 1.4 107* 1.7 1.7 100 Burgess Junction 7880 1.2 .5 240* 1.8 1.5 120 Dome Lake 8880 1.4 .9 156* 2.0 1.7 118 Little Goose 8870 1.9 -M * 1.7 -M * Sucker Creek 8880 1.6 .7 229* 1.9 1.7 112 Tie Creek 6870 1.6 .0 * 2.6 1.8 144 ----- ----- Basin Index (%) 223* 120 BELLE FOURCHE Cole Canyon 5910 .4 .0 * 1.6 1.3 123 ----- ----- Basin Index (%) * 123 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 1.0 1.4 71 North Rapid Creek 6130 .1 .0 * .7 1.3 54 ----- ----- Basin Index (%) * 63 UPPER N. PLATTE Arapaho Ridge 10960 1.8 1.2 150* 3.3 1.7 194 Blackhall Mtn 9820 1.3 -M * 3.6 -M * Columbine 9160 .5 .0 * 3.2 1.6 200 Divide Peak 8880 1.0 .4 250* 3.1 1.9 163 Joe Wright 10120 1.9 .7 271* 4.3 2.0 215 Laprele Creek 8375 .7 .0 * 1.3 1.1 118 Med Bow 10500 1.0 -M * 3.1 -M * North French Creek 10130 .7 .8 88* 2.5 1.9 132 Never Summer 10280 2.0 .8 250* 3.4 -M * Old Battle 10000 2.1 1.2 175* 4.4 2.4 183 Rawah 9020 1.2 .0 * 2.9 1.3 223 Sage Creek Basin 7850 .1 .0 * 2.5 1.2 208 Sand Lake 10050 .9 1.1 82* 1.7 1.8 94 South Brush Creek 8440 .2 .0 * 1.6 1.4 114 Tower 10500 2.7 1.4 193* 3.3 2.4 138 Webber Springs 9250 1.1 .2 550* 3.9 1.8 217 Willow Creek Pass 9540 1.5 .3 500* 2.7 1.1 245 Zirkel 9340 .7 .0 * 3.3 2.4 138 ----- ----- Basin Index (%) 236* 169 SWEETWATER Deer Park 9700 1.1 .7 157* 1.8 1.6 112 Larsen Creek 9000 .0 .0 * 1.5 -M * South Pass 9040 .9 .1 900* 1.7 1.2 142 ----- ----- Basin Index (%) 250* 125 LOWER N. PLATTE Casper Mtn. 7900 .8 .1 800* 1.4 1.6 88 Laprele Creek 8375 .7 .0 * 1.3 1.1 118 Reno Hill 8400 1.0 .5 200* 1.4 1.5 93 Windy Peak 7900 .9 .0 * .6 1.0 60 ----- ----- Basin Index (%) 567* 90 LARAMIE RIVER Brooklyn Lake 10240 1.2 .3 400* 2.0 1.3 154 Cinnabar Park 9574 1.5 .2 750* 2.8 1.5 187 Crow Creek 8330 .5 .0 * 1.6 1.2 133 Deadman Hill 10220 1.5 .9 167* 2.2 1.5 147 Rawah 9020 1.2 .0 * 2.9 1.3 223 Roach 9700 1.4 .3 467* 2.4 1.4 171 ----- ----- Basin Index (%) 429* 170 S. PLATTE Black Mountain 8920 .8 -M * 1.5 -M * Crow Creek 8330 .5 .0 * 1.6 1.2 133 Deadman Hill 10220 1.5 .9 167* 2.2 1.5 147 ----- ----- Basin Index (%) 222* 141 LITTLE SNAKE RIVER Battle Mountain 7440 .2 .0 * 2.0 1.0 200 Divide Peak 8880 1.0 .4 250* 3.1 1.9 163 Elk River 8700 .2 .0 * 2.0 1.5 133 Little Snake River 8915 .0 .2 0* 4.7 2.4 196 Old Battle 10000 2.1 1.2 175* 4.4 2.4 183 Sage Creek Basin 7850 .1 .0 * 2.5 1.2 208 Sandstone RS 8150 .1 .0 * 2.3 1.2 192 Whiskey Park 8950 1.4 .0 * 3.8 1.6 238 ----- ----- Basin Index (%) 283* 188 UPPER GREEN RIVER Big Sandy Opening 9080 .4 .5 80* 1.6 1.0 160 Blind Bull Sum 8650 .0 .3 0* 1.6 1.1 145 East Rim Divide 7930 .0 .0 * 1.2 .7 171 Elkhart Park G.S. 9400 1.0 .3 333* 2.3 1.0 230 Gros Ventre Summit 8750 .2 .8 25* 1.1 .9 122 Gunsight Pass 9820 .0 .3 0* 1.7 1.2 142 Kendall R.S. 7740 .2 .0 * 1.2 .8 150 Loomis Park 8240 -M .0 * -M .9 * New Fork Lake 8340 .0 .0 * 1.2 .7 171 Pocket Creek 9360 .9 -M * 2.2 -M * Snyder Basin 8060 .0 .0 * 1.5 .7 214 Spring Creek Divide 9000 .5 .3 167* 1.9 1.1 173 Triple Peak 8500 .5 .1 500* 1.9 1.1 173 ----- ----- Basin Index (%) 108* 167 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 -M * 2.1 -M * Buck Pasture 9632 .5 -M * 3.1 -M * EF Blacks Fork GS 9360 .4 -M * 2.2 -M * Hams Fork 7840 .0 .0 * 1.6 .6 267 Hewinta 9500 .0 .0 * 2.3 1.2 192 Hickerson Park 9122 1.9 .0 * 3.3 1.0 330 Hole-in-Rock 9168 .3 .0 * 2.8 1.1 255 Indian Creek 9425 .4 .7 57* 1.5 1.1 136 Kelley R.S. 8180 .8 .0 * 1.6 .9 178 Spirit Lk 10235 1.7 -M * 4.3 -M * Steel Creek Park 10158 .6 .5 120* 2.5 1.4 179 ----- ----- Basin Index (%) 333* 214 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 2.4 -M * Bug Lake 7987 .9 .0 * 3.5 1.3 269 Burts Miller Ranch 8000 .0 -M * 1.6 -M * Chalk Creek #1 9171 1.0 .3 333* 5.1 1.7 300 Hayden Fork 9130 .0 .0 * 3.6 1.4 257 Kelley R.S. 8180 .8 .0 * 1.6 .9 178 Lily Lake 9133 .0 .0 * 2.5 1.4 179 Monte Cristo 8932 1.4 .0 * 3.0 1.5 200 Salt River Summit 7640 .0 .0 * 1.8 .9 200 ----- ----- Basin Index (%) 1367* 232 ----------------------------------------------------------------------------- -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.