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 FRIDAY: OCTOBER 13 , 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 * 1.4 .8 175 Blind Bull Sum 8650 -M .1 * 1.0 .8 125 Cottonwood Creek 7670 .1 .0 * 2.7 1.0 270 East Rim Divide 7930 -M .0 * .7 .4 175 Grand Targhee 9260 1.4 1.5 93* 3.4 2.1 162 Granite Creek 6770 .0 .0 * .9 .6 150 Grassy Lake 7265 -M .0 * 2.1 1.2 175 Gros Ventre Summit 8750 .6 .1 600* 1.8 .8 225 Gunsight Pass 9820 1.6 .0 * 2.8 .8 350 Lewis Lake Divide 7850 .1 .0 * 1.2 1.0 120 Loomis Park 8240 .2 .0 * 1.1 .6 183 Phillips Bench 8200 .2 .0 * 1.8 .9 200 Salt River Summit 7640 .0 .0 * .5 .7 71 Snake River Station 6920 .0 .0 * 1.3 .8 162 Somsen Ranch 6800 -M .0 * 2.0 .8 250 Spring Creek Divide 9000 .1 .2 50* 1.4 .7 200 Thumb Divide 7980 .2 .0 * .7 .9 78 Togwotee Pass 9580 1.0 .8 125* 1.5 1.2 125 Triple Peak 8500 -M .0 * 1.1 .8 138 Two Ocean Plateau 9240 1.3 1.0 130* 2.2 1.2 183 Willow Creek 8080 .1 .0 * 3.1 1.4 221 Younts Peak 8350 -M .0 * -M .7 * ----- ----- Basin Index (%) 192* 178 MADISON HEADWATERS IN WYOMING Black Bear 8170 .9 .8 112* 2.2 1.2 183 Canyon 7870 .1 -M * .9 -M * Madison Plateau 7750 .0 .0 * 1.2 1.2 100 West Yellowstone 6700 .1 .0 * .8 .7 114 Whiskey Creek 6800 .0 .0 * 1.3 .8 162 ----- ----- Basin Index (%) 125* 141 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 1.2 .8 150* 1.7 .8 212 Canyon 7870 .1 -M * .9 -M * Evening Star 9200 1.9 .7 271* 3.2 1.4 229 Fisher Creek 9100 .4 .9 44* 1.5 1.2 125 Monument Peak 8850 1.0 .6 167* 2.2 1.2 183 Northeast Entrance 7350 .0 .0 * .8 .7 114 Parker Peak 9400 1.3 1.0 130* 2.4 1.2 200 Sylvan Lake 8420 .5 .2 250* 3.0 1.4 214 Thumb Divide 7980 .2 .0 * .7 .9 78 Two Ocean Plateau 9240 1.3 1.0 130* 2.2 1.2 183 White Mill 8700 .3 .6 50* 1.3 .9 144 Wolverine 7650 .6 .0 * 1.8 .8 225 ----- ----- Basin Index (%) 150* 178 WIND RIVER Burroughs Creek 8750 .0 -M * 1.0 -M * Castle Creek 8400 .7 .0 * 1.2 .6 200 Cold Springs 9630 1.4 .0 * 1.8 .7 257 Deer Park 9700 1.0 .5 200* 1.9 1.1 173 Hobbs Park 10100 2.8 .5 560* -M .8 * Kirwin 9550 -M .6 * -M 1.0 * Little Warm 9370 1.0 .0 * 1.8 .7 257 South Pass 9040 .8 .0 * 1.5 .8 188 St. Lawrence Alt 8620 1.2 -M * 1.9 -M * Togwotee Pass 9580 1.0 .8 125* 1.5 1.2 125 Townsend Creek 8700 1.7 .0 * 2.8 .8 350 ----- ----- Basin Index (%) 578* 212 BIGHORN BASIN Bald Mtn. 9380 -M 1.4 * -M 1.4 * Bear Trap Meadow 8200 1.4 .0 * -M .9 * Bone Springs Div 9350 1.5 .8 188* 2.6 1.2 217 Grave Springs 8550 .6 .2 300* 1.8 .7 257 Kirwin 9550 -M .6 * -M 1.0 * Marquette 8760 -M .1 * -M 1.1 * Middle Powder 7760 .8 .3 267* 2.8 .9 311 Owl Creek 8975 1.0 .4 250* 1.6 .8 200 Powder River Pass 9480 -M .2 * -M 1.0 * Shell Creek 9580 2.1 1.2 175* 2.8 1.1 255 Timber Creek 7950 -M .0 * 4.1 1.0 410 ----- ----- Basin Index (%) 255* 275 SHOSHONE RIVER Blackwater 9780 -M .9 * 2.5 1.3 192 Evening Star 9200 1.9 .7 271* 3.2 1.4 229 Marquette 8760 -M .1 * -M 1.1 * Sylvan Lake 8420 .5 .2 250* 3.0 1.4 214 Sylvan Road 7120 .0 .0 * 2.1 .9 233 Younts Peak 8350 -M .0 * -M .7 * ----- ----- Basin Index (%) 267* 216 POWDER RIVER Bear Trap Meadow 8200 1.4 .0 * -M .9 * Cloud Peak Reservoir 9860 -M .5 * -M 1.3 * Grave Springs 8550 .6 .2 300* 1.8 .7 257 Hansen Sawmill 8360 -M .0 * -M .9 * Middle Powder 7760 .8 .3 267* 2.8 .9 311 Powder River Pass 9480 -M .2 * -M 1.0 * Soldier Park 8720 2.7 .1 2700* 3.2 1.0 320 ----- ----- Basin Index (%) 917* 300* TONGUE RIVER Big Goose 7990 -M .2 * -M 1.2 * Bone Springs Div 9350 1.5 .8 188* 2.6 1.2 217 Burgess Junction 7880 -M .3 * -M 1.1 * Dome Lake 8880 -M .4 * -M 1.1 * Little Goose 8870 3.1 .4 775* 4.3 1.3 331 Sucker Creek 8880 -M .5 * -M 1.0 * Tie Creek 6870 -M .0 * -M 1.0 * ----- ----- Basin Index (%) 383* 276* BELLE FOURCHE Blind Park 6890 .3 .0 * 1.6 .8 200 Cole Canyon 5910 .0 .0 * 1.0 .8 125 North Rapid Creek 6130 .0 .0 * 2.2 .6 367 ----- ----- Basin Index (%) * 218 CHEYENNE RIVER BASIN Blind Park 6890 .3 .0 * 1.6 .8 200 North Rapid Creek 6130 .0 .0 * 2.2 .6 367 ----- ----- Basin Index (%) * 271 UPPER N. PLATTE Arapaho Ridge 10976 .8 .6 133* 1.1 1.0 110 Blackhall Mtn 9839 1.5 .8 188* 2.2 1.4 157 Cinnabar Park 9707 .2 .3 67* .9 .8 112 Columbine 9167 .5 .0 * .9 1.2 75 Divide Peak 8730 1.3 .0 * 2.6 1.4 186 Joe Wright 10158 1.2 .4 300* 1.8 1.5 120 Laprele Creek 8390 1.8 .0 * 2.5 .6 417 Med Bow 10512 1.2 -M * 2.1 -M * Never Summer 10323 1.3 .8 162* 1.2 1.2 100 North French Creek 10153 .9 .6 150* 1.7 1.4 121 Old Battle 9860 .8 .6 133* 1.6 1.4 114 Rawah 9069 1.2 .2 600* 1.6 1.2 133 Sage Creek Basin 7850 .7 .0 * 1.4 .9 156 Sand Lake 10098 1.7 .7 243* 1.8 1.2 150 South Brush Creek 8495 .6 .0 * 1.1 .8 138 Tower 10620 1.9 .9 211* 1.7 1.6 106 Webber Springs 9260 .6 .0 * 1.2 1.2 100 Whiskey Park 9020 .7 .0 * 1.4 1.3 108 Willow Creek Pass 9523 .9 .0 * 1.1 .8 138 Zirkel 9338 .6 .0 * 1.2 1.6 75 ----- ----- Basin Index (%) 325* 129 SWEETWATER Deer Park 9700 1.0 .5 200* 1.9 1.1 173 Larsen Creek 9000 -M .0 * 1.1 .7 157 South Pass 9040 .8 .0 * 1.5 .8 188 ----- ----- Basin Index (%) 360* 173 LOWER N. PLATTE Casper Mtn. 7920 4.2 .2 2100* 4.9 .9 544 Laprele Creek 8390 1.8 .0 * 2.5 .6 417 Reno Hill 8430 2.5 .4 625* 3.5 1.0 350 Windy Peak 7915 1.5 .0 * 1.6 .6 267 ----- ----- Basin Index (%) 1667* 403 LARAMIE RIVER Brooklyn Lake 10250 .5 .2 250* .9 .8 112 Cinnabar Park 9707 .2 .3 67* .9 .8 112 Crow Creek 8335 .6 .0 * 1.5 .6 250 Deadman Hill 10239 1.5 .6 250* 1.3 .8 162 Rawah 9069 1.2 .2 600* 1.6 1.2 133 Roach 9740 .9 .0 * 1.2 .9 133 Windy Peak 7915 1.5 .0 * 1.6 .6 267 ----- ----- Basin Index (%) 492* 158 S. PLATTE Crow Creek 8335 .6 .0 * 1.5 .6 250 ----- ----- Basin Index (%) * 250 LITTLE SNAKE RIVER Battle Mountain 7498 .6 .0 * 1.5 .8 188 Divide Peak 8730 1.3 .0 * 2.6 1.4 186 Elk River 8739 .8 .0 * 1.1 1.1 100 Elkhead Divide 8800 .5 -M * 1.2 -M * Little Snake River 8928 .4 .0 * 1.8 1.7 106 Old Battle 9860 .8 .6 133* 1.6 1.4 114 Sage Creek Basin 7850 .7 .0 * 1.4 .9 156 Sandstone RS 8152 .6 .0 * 1.2 .9 133 Whiskey Park 9020 .7 .0 * 1.4 1.3 108 ----- ----- Basin Index (%) 983* 133 UPPER GREEN RIVER Big Sandy Opening 9080 -M .2 * 1.2 .8 150 Blind Bull Sum 8650 -M .1 * 1.0 .8 125 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 .6 .1 600* 1.8 .8 225 Gunsight Pass 9820 1.6 .0 * 2.8 .8 350 Indian Creek 9425 .5 .2 250* 1.4 .8 175 Kendall R.S. 7740 .0 .0 * 1.5 .5 300 Larsen Creek 9000 -M .0 * 1.1 .7 157 Loomis Park 8240 .2 .0 * 1.1 .6 183 New Fork Lake 8340 -M .0 * .0 .4 0 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 -M .0 * .5 .5 100 Spring Creek Divide 9000 .1 .2 50* 1.4 .7 200 Triple Peak 8500 -M .0 * 1.1 .8 138 ----- ----- Basin Index (%) 600* 182 LOWER GREEN RIVER Blacks Fork Jct 8869 .2 -M * 1.0 -M * Buck Pasture 9632 .6 -M * 1.8 -M * EF Blacks Fork GS 9360 .5 -M * 1.4 -M * Hams Fork 7840 -M .0 * .5 .4 125 Henrys Fork 10182 -M -M * 2.0 -M * Hewinta 9500 .2 .0 * 1.3 .8 162 Hickerson Park 9122 .0 .0 * 2.3 .6 383 Hole-in-Rock 9168 .1 .0 * 1.6 .8 200 Indian Creek 9425 .5 .2 250* 1.4 .8 175 Kelley R.S. 8180 .3 .0 * 1.0 .6 167 Spirit Lk 10235 .5 .0 * 2.6 1.0 260 Steel Creek Park 10158 .8 .2 400* 1.8 .9 200 ----- ----- Basin Index (%) 600* 212 UPPER BEAR RIVER Bear River RS 8777 .1 -M * 1.0 -M * Bug Lake 7987 .0 .0 * 1.2 .6 200 Burts Miller Ranch 8000 .2 .0 * 1.1 .3 367 Chalk Creek #1 9171 .7 .0 * 2.0 1.0 200 Giveout 6930 -M .0 * .6 .6 100 Hayden Fork 9130 .3 .0 * 2.1 1.0 210 Kelley R.S. 8180 .3 .0 * 1.0 .6 167 Lily Lake 9133 .4 .0 * 1.6 1.0 160 Monte Cristo 8932 .4 .0 * 1.8 .8 225 Salt River Summit 7640 .0 .0 * .5 .7 71 Spring Creek Divide 9000 .1 .2 50* 1.4 .7 200 Trial Lake 9992 .3 .0 * 1.7 .8 212 ----- ----- Basin Index (%) 1350* 185 ----------------------------------------------------------------------------- -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.