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 SUNDAY: OCTOBER 21 , 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 * 1.2 1.3 92 Black Bear 8170 1.2 1.6 75* 3.0 2.4 125 Blind Bull Sum 8650 .0 .5 0* 1.7 1.3 131 Cottonwood Creek 7670 .3 .0 * 1.7 1.7 100 East Rim Divide 7930 .0 .0 * 1.2 .9 133 Grand Targhee 9260 1.7 3.4 50* 2.7 4.3 63 Granite Creek 6770 .2 .0 * 1.5 1.2 125 Grassy Lake 7265 .2 .0 * 2.2 2.1 105 Gros Ventre Summit 8750 .2 .9 22* 1.0 1.2 83 Gunsight Pass 9820 .0 .5 0* 1.7 1.5 113 Lewis Lake Divide 7850 .0 .0 * 1.6 1.9 84 Phillips Bench 8200 .0 .0 * 1.9 1.5 127 Salt River Summit 7640 .0 .0 * 1.8 1.1 164 Snake River Station 6920 .0 .0 * 1.5 1.8 83 Spring Creek Divide 9000 .5 .5 100* 1.9 1.4 136 Thumb Divide 7980 .0 .0 * 1.3 1.5 87 Togwotee Pass 9580 .9 1.8 50* 1.2 1.8 67 Two Ocean Plateau 9240 2.0 2.1 95* 1.6 1.9 84 Willow Creek 8080 .0 .0 * 2.9 2.3 126 Younts Peak 8350 -M .7 * -M 1.5 * ----- ----- Basin Index (%) 65* 102 MADISON-GALLATIN Black Bear 8170 1.2 1.6 75* 3.0 2.4 125 Canyon 7870 .5 .2 250* 1.7 1.3 131 Madison Plateau 7750 .1 .6 17* 2.1 1.8 117 West Yellowstone 6700 .1 .0 * 1.4 1.3 108 Whiskey Creek 6800 .0 .0 * 1.0 1.5 67 ----- ----- Basin Index (%) 79* 111 YELLOWSTONE Beartooth Lake 9360 1.0 1.6 62* 1.0 1.5 67 Burnt Mtn 5880 1.0 .0 * 2.7 2.6 104 Canyon 7870 .5 .2 250* 1.7 1.3 131 Cole Creek 7850 3.0 1.6 188* 2.7 2.3 117 Evening Star 9200 1.5 1.2 125* 2.5 2.1 119 Fisher Creek 9100 1.1 1.5 73* 2.2 2.3 96 Northeast Entrance 7350 .1 .0 * 1.2 1.2 100 Parker Peak 9400 1.7 1.5 113* 2.4 1.9 126 Sylvan Lake 8420 1.3 .9 144* 3.0 2.1 143 Thumb Divide 7980 .0 .0 * 1.3 1.5 87 Two Ocean Plateau 9240 2.0 2.1 95* 1.6 1.9 84 White Mill 8700 .6 1.2 50* 1.3 1.8 72 Wolverine 7650 .0 .0 * 1.2 1.3 92 ----- ----- Basin Index (%) 117* 104 WIND RIVER Burroughs Creek 8750 .0 -M * 1.1 -M * Castle Creek 8400 .0 -M * .8 -M * Cold Springs 9630 1.0 .2 500* 1.4 1.3 108 Deer Park 9700 1.2 1.1 109* 1.9 1.9 100 Hobbs Park 10100 1.4 1.0 140* 1.8 1.5 120 Kirwin 9550 .8 .9 89* 1.1 1.3 85 Little Warm 9370 .2 .5 40* 1.7 1.3 131 Owl Creek 8975 1.2 .3 400* 1.3 .9 144 South Pass 9040 1.0 .3 333* 1.8 1.4 129 St. Lawrence Alt 8620 .0 .0 * 1.9 1.2 158 Togwotee Pass 9580 .9 1.8 50* 1.2 1.8 67 Townsend Creek 8700 1.2 .0 * 1.9 1.5 127 ----- ----- Basin Index (%) 146* 113 BIGHORN BASIN Bald Mtn. 9380 1.4 2.1 67 1.5 1.9 79 Bear Trap Meadow 8200 .9 .2 450* 1.6 1.2 133 Bone Springs Div 9350 1.4 1.6 88* 1.8 1.9 95 Grave Springs 8550 1.1 .4 275* 1.8 1.6 112 Kirwin 9550 .8 .9 89* 1.1 1.3 85 Marquette 8760 .2 -M * 1.1 -M * Middle Powder 7760 1.2 .5 240* 1.7 1.7 100 Owl Creek 8975 1.2 .3 400* 1.3 .9 144 Powder River Pass 9480 .9 .7 129* 1.5 1.5 100 Shell Creek 9580 1.8 2.1 86 2.2 1.7 129 Timber Creek 7950 .8 .2 400* 1.2 1.5 80 ----- ----- Basin Index (%) 128* 103 SHOSHONE RIVER Blackwater 9780 1.6 1.7 94* 2.3 1.9 121 Evening Star 9200 1.5 1.2 125* 2.5 2.1 119 Marquette 8760 .2 -M * 1.1 -M * Sylvan Road 7120 .0 .0 * 1.2 1.6 75 Younts Peak 8350 -M .7 * -M 1.5 * ----- ----- Basin Index (%) 107* 107 POWDER RIVER Bear Trap Meadow 8200 .9 .2 450* 1.6 1.2 133 Cloud Peak Reservoir 9860 1.8 1.1 164* 1.9 2.0 95 Grave Springs 8550 1.1 .4 275* 1.8 1.6 112 Hansen Sawmill 8360 1.3 .0 * 1.8 1.3 138 Middle Powder 7760 1.2 .5 240* 1.7 1.7 100 Powder River Pass 9480 .9 .7 129* 1.5 1.5 100 Soldier Park 8720 1.0 -M * 1.7 -M * ----- ----- Basin Index (%) 248* 111 TONGUE RIVER Big Goose 7990 1.3 .6 217* 2.1 1.9 111 Bone Springs Div 9350 1.4 1.6 88* 1.8 1.9 95 Burgess Junction 7880 1.2 .7 171* 1.9 1.7 112 Dome Lake 8880 1.4 1.0 140* 2.2 1.9 116 Little Goose 8870 1.7 -M * 1.6 -M * Sucker Creek 8880 1.6 .9 178* 2.3 1.9 121 Tie Creek 6870 1.0 .0 * 2.7 2.0 135 ----- ----- Basin Index (%) 165* 115 BELLE FOURCHE Cole Canyon 5910 .1 .0 * 1.6 1.4 114 ----- ----- Basin Index (%) * 114 CHEYENNE RIVER BASIN Blind Park 6890 .1 .0 * 1.0 1.6 62 North Rapid Creek 6130 .0 .0 * .7 1.5 47 ----- ----- Basin Index (%) * 55 UPPER N. PLATTE Arapaho Ridge 10960 1.9 1.6 119* 3.3 2.2 150 Blackhall Mtn 9820 1.2 -M * 3.6 -M * Columbine 9160 .1 .0 * 3.0 1.8 167 Divide Peak 8880 .4 .6 67* 3.2 2.1 152 Joe Wright 10120 1.8 1.0 180* 4.3 2.3 187 Laprele Creek 8375 .7 .0 * 1.4 1.3 108 Med Bow 10500 1.0 -M * 3.2 -M * North French Creek 10130 .7 1.4 50* 2.6 2.2 118 Never Summer 10280 2.0 1.1 182* 3.4 -M * Old Battle 10000 2.1 1.4 150* 4.5 2.8 161 Rawah 9020 .9 .0 * 2.9 1.5 193 Sage Creek Basin 7850 .1 .0 * 2.5 1.5 167 Sand Lake 10050 1.1 1.5 73* 1.7 2.1 81 South Brush Creek 8440 .0 .0 * 1.5 1.6 94 Tower 10500 2.7 1.9 142* 3.4 2.8 121 Webber Springs 9250 1.1 .4 275* 3.9 2.1 186 Willow Creek Pass 9540 1.5 .4 375* 2.8 1.3 215 Zirkel 9340 .2 .0 * 3.4 2.9 117 ----- ----- Basin Index (%) 153* 146 SWEETWATER Deer Park 9700 1.2 1.1 109* 1.9 1.9 100 Larsen Creek 9000 .0 .0 * 1.5 -M * South Pass 9040 1.0 .3 333* 1.8 1.4 129 ----- ----- Basin Index (%) 157* 112 LOWER N. PLATTE Casper Mtn. 7900 .3 .2 150* 1.5 1.8 83 Laprele Creek 8375 .7 .0 * 1.4 1.3 108 Reno Hill 8400 1.0 .7 143* 1.6 1.7 94 Windy Peak 7900 .7 .0 * 1.0 1.1 91 ----- ----- Basin Index (%) 300* 93 LARAMIE RIVER Brooklyn Lake 10240 .6 .4 150* 2.0 1.6 125 Cinnabar Park 9574 1.5 .6 250* 2.8 1.9 147 Crow Creek 8330 .4 .0 * 1.7 1.3 131 Deadman Hill 10220 1.5 1.2 125* 2.2 1.6 138 Rawah 9020 .9 .0 * 2.9 1.5 193 Roach 9700 1.4 .4 350* 2.5 1.6 156 ----- ----- Basin Index (%) 242* 148 S. PLATTE Black Mountain 8920 .8 -M * 1.5 -M * Crow Creek 8330 .4 .0 * 1.7 1.3 131 Deadman Hill 10220 1.5 1.2 125* 2.2 1.6 138 ----- ----- Basin Index (%) 158* 134 LITTLE SNAKE RIVER Battle Mountain 7440 .2 .0 * 2.1 1.2 175 Divide Peak 8880 .4 .6 67* 3.2 2.1 152 Elk River 8700 .1 .0 * 2.1 1.7 124 Little Snake River 8915 .0 .5 0* 4.7 3.1 152 Old Battle 10000 2.1 1.4 150* 4.5 2.8 161 Sage Creek Basin 7850 .1 .0 * 2.5 1.5 167 Sandstone RS 8150 .1 .0 * 2.4 1.4 171 Whiskey Park 8950 1.3 .2 650* 3.8 1.8 211 ----- ----- Basin Index (%) 159* 162 UPPER GREEN RIVER Big Sandy Opening 9080 .5 .7 71* 1.6 1.2 133 Blind Bull Sum 8650 .0 .5 0* 1.7 1.3 131 East Rim Divide 7930 .0 .0 * 1.2 .9 133 Elkhart Park G.S. 9400 1.1 .4 275* 2.4 1.2 200 Gros Ventre Summit 8750 .2 .9 22* 1.0 1.2 83 Gunsight Pass 9820 .0 .5 0* 1.7 1.5 113 Kendall R.S. 7740 .1 .0 * 1.2 .9 133 Loomis Park 8240 -M .0 * -M 1.1 * New Fork Lake 8340 .0 .0 * 1.3 .9 144 Pocket Creek 9360 1.0 -M * 2.3 -M * Snyder Basin 8060 .0 .0 * 1.6 .9 178 Spring Creek Divide 9000 .5 .5 100* 1.9 1.4 136 Triple Peak 8500 .5 .3 167* 1.9 1.5 127 ----- ----- Basin Index (%) 76* 136 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 -M * 2.1 -M * Buck Pasture 9632 .2 -M * 3.0 -M * EF Blacks Fork GS 9360 .3 -M * 2.1 -M * Hams Fork 7840 .0 .0 * 1.6 .9 178 Hewinta 9500 .0 .0 * 2.3 1.4 164 Hickerson Park 9122 2.0 .0 * 3.3 1.2 275 Hole-in-Rock 9168 .3 .0 * 2.8 1.3 215 Indian Creek 9425 .2 .9 22* 1.5 1.4 107 Kelley R.S. 8180 .8 .0 * 1.6 1.2 133 Spirit Lk 10235 1.6 -M * 4.4 -M * Steel Creek Park 10158 .6 .7 86* 2.5 1.6 156 ----- ----- Basin Index (%) 244* 173 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 2.4 -M * Bug Lake 7987 .8 .0 * 3.5 1.5 233 Burts Miller Ranch 8000 .1 -M * 1.6 -M * Chalk Creek #1 9171 .5 .4 125* 5.0 2.0 250 Hayden Fork 9130 .0 .0 * 3.6 1.7 212 Kelley R.S. 8180 .8 .0 * 1.6 1.2 133 Lily Lake 9133 .0 .0 * 2.5 1.6 156 Monte Cristo 8932 1.0 .0 * 2.9 1.8 161 Salt River Summit 7640 .0 .0 * 1.8 1.1 164 ----- ----- Basin Index (%) 775* 192 ----------------------------------------------------------------------------- -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.