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 12 , 2023 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 -M .0 * 1.2 .8 150 Blind Bull Sum 8650 .0 .2 0* 1.0 .7 143 Cottonwood Creek 7670 .1 .0 * 2.4 1.0 240 East Rim Divide 7930 -M .0 * .7 .4 175 Grand Targhee 9260 .8 1.5 53* 2.8 1.9 147 Granite Creek 6770 .0 .0 * 1.1 .5 220 Grassy Lake 7265 -M .0 * 1.9 1.1 173 Gros Ventre Summit 8750 .2 .0 * 1.2 .8 150 Gunsight Pass 9820 .9 .1 900* 2.0 .8 250 Lewis Lake Divide 7850 .3 .0 * 1.0 .9 111 Loomis Park 8240 .2 .0 * 1.2 .6 200 Phillips Bench 8200 .2 .0 * 1.8 .8 225 Salt River Summit 7640 .0 .0 * .4 .6 67 Snake River Station 6920 .2 .0 * 1.2 .8 150 Somsen Ranch 6800 -M .0 * 1.6 .6 267 Spring Creek Divide 9000 .0 .2 0* 1.3 .6 217 Thumb Divide 7980 .3 .0 * .7 .8 88 Togwotee Pass 9580 .7 .6 117* 1.0 1.1 91 Triple Peak 8500 -M .0 * 1.0 .7 143 Two Ocean Plateau 9240 .8 .9 89* 1.9 1.2 158 Willow Creek 8080 -M .0 * 2.6 1.4 186 Younts Peak 8350 -M .1 * -M .6 * ----- ----- Basin Index (%) 134* 166 MADISON HEADWATERS IN WYOMING Black Bear 8170 .6 .8 75* 1.9 1.1 173 Canyon 7870 .2 -M * .8 -M * Madison Plateau 7750 .2 .0 * 1.0 1.0 100 West Yellowstone 6700 .1 .0 * .8 .6 133 Whiskey Creek 6800 .1 .0 * 1.2 .6 200 ----- ----- Basin Index (%) 125* 148 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 .6 .8 75* 1.1 .8 138 Canyon 7870 .2 -M * .8 -M * Evening Star 9200 .9 .6 150* 2.2 1.4 157 Fisher Creek 9100 .2 .7 29* 1.2 1.2 100 Monument Peak 8850 .5 .4 125* 1.6 1.0 160 Northeast Entrance 7350 .0 .0 * .8 .7 114 Parker Peak 9400 .7 1.0 70* 1.9 1.1 173 Sylvan Lake 8420 .4 .2 200* 2.6 1.2 217 Thumb Divide 7980 .3 .0 * .7 .8 88 Two Ocean Plateau 9240 .8 .9 89* 1.9 1.2 158 White Mill 8700 .2 .5 40* 1.1 .9 122 Wolverine 7650 -M .0 * -M .7 * ----- ----- Basin Index (%) 90* 147 WIND RIVER Burroughs Creek 8750 .1 -M * .8 -M * Castle Creek 8400 .4 .0 * .8 .6 133 Cold Springs 9630 .5 .0 * .9 .6 150 Deer Park 9700 .2 .4 50* 1.1 1.0 110 Hobbs Park 10100 .9 .5 180* 1.4 .7 200 Kirwin 9550 -M .5 * -M 1.0 * Little Warm 9370 .6 .0 * 1.3 .7 186 South Pass 9040 .3 .0 * .8 .7 114 St. Lawrence Alt 8620 .2 -M * .7 -M * Togwotee Pass 9580 .7 .6 117* 1.0 1.1 91 Townsend Creek 8700 .7 .0 * 1.7 .8 212 ----- ----- Basin Index (%) 287* 145 BIGHORN BASIN Bald Mtn. 9380 .9 1.3 69* 1.2 1.2 100 Bear Trap Meadow 8200 .3 .0 * 1.3 .8 162 Bone Springs Div 9350 .5 .8 62* 1.7 1.2 142 Grave Springs 8550 .2 .2 100* 1.1 .7 157 Kirwin 9550 -M .5 * -M 1.0 * Marquette 8760 -M .1 * -M 1.0 * Middle Powder 7760 .1 .4 25* 1.7 .8 212 Owl Creek 8975 .6 .4 150* 1.3 .8 162 Powder River Pass 9480 -M .1 * -M 1.0 * Shell Creek 9580 1.4 1.2 117* 1.9 1.0 190 Timber Creek 7950 1.3 .0 * 2.1 1.0 210 ----- ----- Basin Index (%) 123* 164 SHOSHONE RIVER Blackwater 9780 1.1 .8 138* 1.2 1.2 100 Evening Star 9200 .9 .6 150* 2.2 1.4 157 Marquette 8760 -M .1 * -M 1.0 * Sylvan Lake 8420 .4 .2 200* 2.6 1.2 217 Sylvan Road 7120 -M .0 * -M .8 * Younts Peak 8350 -M .1 * -M .6 * ----- ----- Basin Index (%) 150* 158 POWDER RIVER Bear Trap Meadow 8200 .3 .0 * 1.3 .8 162 Cloud Peak Reservoir 9860 -M .3 * -M 1.2 * Grave Springs 8550 .2 .2 100* 1.1 .7 157 Hansen Sawmill 8360 -M .0 * 1.0 .9 111 Middle Powder 7760 .1 .4 25* 1.7 .8 212 Powder River Pass 9480 -M .1 * -M 1.0 * Soldier Park 8720 1.3 .2 650* 1.7 1.0 170 ----- ----- Basin Index (%) 238* 162 TONGUE RIVER Big Goose 7990 1.0 .0 * -M 1.0 * Bone Springs Div 9350 .5 .8 62* 1.7 1.2 142 Burgess Junction 7880 -M .3 * -M 1.0 * Dome Lake 8880 1.1 .2 550* 1.8 1.0 180 Little Goose 8870 1.3 .4 325* 2.6 1.2 217 Sucker Creek 8880 1.1 .4 275* 2.3 1.0 230 Tie Creek 6870 .2 .0 * -M .8 * ----- ----- Basin Index (%) 289* 191 BELLE FOURCHE Blind Park 6890 .1 .0 * .6 .7 86 Cole Canyon 5910 .1 .0 * .6 .6 100 North Rapid Creek 6130 .1 .0 * .7 .6 117 ----- ----- Basin Index (%) * 100 CHEYENNE RIVER BASIN Blind Park 6890 .1 .0 * .6 .7 86 North Rapid Creek 6130 .1 .0 * .7 .6 117 ----- ----- Basin Index (%) * 100 UPPER N. PLATTE Arapaho Ridge 10976 .4 .3 133* .6 .8 75 Blackhall Mtn 9839 .3 .6 50* .9 1.3 69 Cinnabar Park 9707 .1 .3 33* .7 .7 100 Columbine 9167 -M .0 * .2 1.2 17 Divide Peak 8730 .2 .0 * 1.3 1.3 100 Joe Wright 10158 .3 .4 75* .7 1.4 50 Laprele Creek 8390 .2 .0 * .5 .5 100 Med Bow 10512 .3 -M * 1.2 -M * Never Summer 10323 .3 .8 38* .4 1.0 40 North French Creek 10153 .3 .4 75* .9 1.2 75 Old Battle 9860 .3 .6 50* 1.2 1.2 100 Rawah 9069 .0 .0 * .3 1.2 25 Sage Creek Basin 7850 .1 .0 * .8 .7 114 Sand Lake 10098 .1 .5 20* .4 1.0 40 South Brush Creek 8495 -M .0 * .4 .7 57 Tower 10620 .7 1.0 70* .9 1.4 64 Webber Springs 9260 .2 .0 * .7 1.2 58 Whiskey Park 9020 .2 .0 * .8 1.2 67 Willow Creek Pass 9523 .2 .0 * .4 .6 67 Zirkel 9338 .2 .0 * .7 1.6 44 ----- ----- Basin Index (%) 84* 63 SWEETWATER Deer Park 9700 .2 .4 50* 1.1 1.0 110 Larsen Creek 9000 -M .0 * .9 .7 129 South Pass 9040 .3 .0 * .8 .7 114 ----- ----- Basin Index (%) 125* 117 LOWER N. PLATTE Casper Mtn. 7920 .1 .2 50* 1.5 .8 188 Laprele Creek 8390 .2 .0 * .5 .5 100 Reno Hill 8430 .0 .3 0* 1.0 .8 125 Windy Peak 7915 .2 .0 * .3 .5 60 ----- ----- Basin Index (%) 100* 127 LARAMIE RIVER Brooklyn Lake 10250 .2 .2 100* .6 .6 100 Cinnabar Park 9707 .1 .3 33* .7 .7 100 Crow Creek 8335 .0 .1 0* .9 .5 180 Deadman Hill 10239 .3 .6 50* .1 .6 17 Rawah 9069 .0 .0 * .3 1.2 25 Roach 9740 .2 .0 * .6 .6 100 Windy Peak 7915 .2 .0 * .3 .5 60 ----- ----- Basin Index (%) 83* 74 S. PLATTE Crow Creek 8335 .0 .1 0* .9 .5 180 ----- ----- Basin Index (%) 0* 180 LITTLE SNAKE RIVER Battle Mountain 7498 .0 .0 * .6 .8 75 Divide Peak 8730 .2 .0 * 1.3 1.3 100 Elk River 8739 .4 .0 * .6 1.1 55 Elkhead Divide 8800 .1 -M * .7 -M * Little Snake River 8928 .1 .0 * 1.2 1.7 71 Old Battle 9860 .3 .6 50* 1.2 1.2 100 Sage Creek Basin 7850 .1 .0 * .8 .7 114 Sandstone RS 8152 .0 .0 * .6 .9 67 Whiskey Park 9020 .2 .0 * .8 1.2 67 ----- ----- Basin Index (%) 217* 80 UPPER GREEN RIVER Big Sandy Opening 9080 -M .2 * 1.1 .8 138 Blind Bull Sum 8650 .0 .2 0* 1.0 .7 143 East Rim Divide 7930 -M .0 * .7 .4 175 Elkhart Park G.S. 9400 .0 .0 * 1.9 1.0 190 Gros Ventre Summit 8750 .2 .0 * 1.2 .8 150 Gunsight Pass 9820 .9 .1 900* 2.0 .8 250 Indian Creek 9425 .2 .2 100* 1.1 .8 138 Kendall R.S. 7740 .1 .0 * 1.4 .5 280 Larsen Creek 9000 -M .0 * .9 .7 129 Loomis Park 8240 .2 .0 * 1.2 .6 200 New Fork Lake 8340 -M .0 * -M .4 * Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 -M .0 * .5 .5 100 Spring Creek Divide 9000 .0 .2 0* 1.3 .6 217 Triple Peak 8500 -M .0 * 1.0 .7 143 ----- ----- Basin Index (%) 229* 172 LOWER GREEN RIVER Blacks Fork Jct 8869 .1 -M * .9 -M * Buck Pasture 9632 .5 -M * 1.5 -M * EF Blacks Fork GS 9360 .4 -M * 1.2 -M * Hams Fork 7840 -M .0 * .4 .4 100 Henrys Fork 10182 -M -M * 1.9 -M * Hewinta 9500 .1 .0 * 1.0 .8 125 Hickerson Park 9122 .0 .0 * 2.0 .6 333 Hole-in-Rock 9168 .0 .0 * 1.4 .7 200 Indian Creek 9425 .2 .2 100* 1.1 .8 138 Kelley R.S. 8180 .3 .0 * .9 .6 150 Spirit Lk 10235 .3 .0 * 2.3 1.0 230 Steel Creek Park 10158 .4 .2 200* 1.4 .9 156 ----- ----- Basin Index (%) 325* 181 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 1.0 -M * Bug Lake 7987 .3 .0 * 1.2 .6 200 Burts Miller Ranch 8000 .2 .0 * 1.0 .3 333 Chalk Creek #1 9171 .4 .0 * 1.7 1.0 170 Giveout 6930 -M .0 * .6 .5 120 Hayden Fork 9130 .3 .0 * 1.8 1.0 180 Kelley R.S. 8180 .3 .0 * .9 .6 150 Lily Lake 9133 .1 .0 * 1.3 1.0 130 Monte Cristo 8932 .3 .0 * 1.6 .8 200 Salt River Summit 7640 .0 .0 * .4 .6 67 Spring Creek Divide 9000 .0 .2 0* 1.3 .6 217 Trial Lake 9992 .1 .0 * 1.6 .8 200 ----- ----- Basin Index (%) 1000* 172 ----------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. Units = inches for the Current and Median (or Average) 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 (or Average) represents the snow water equivalent found at selected SNOTEL sites in or near the basin compared to the Median (or Average) value for those sites on this day. The TOTAL PRECIPITATION Percent of Median (or Average) represents the total precipitation (beginning October 1st) found at selected SNOTEL sites in or near the basin compared to the Median (or Average) value for those sites on this day. Contact your state water supply staff for assistance. Medians and averages are calculated for the period 1991-2020. 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 or average for the day is less than 10% of the maximum median or average value for the year. * Basin - More than half of the stations for a basin with medians (or averages) report missing or invalid data The basin index is calculated as the sum of the valid current values divided by the sum of the corresponding medians or averages 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.