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 20 , 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 * 1.3 1.4 93 Blind Bull Sum 8650 .1 .6 17* 1.0 1.0 100 Cottonwood Creek 7670 .1 .0 * 2.7 1.5 180 East Rim Divide 7930 -M .0 * 1.0 .6 167 Grand Targhee 9260 1.0 2.4 42* 3.5 2.8 125 Granite Creek 6770 .0 .0 * 1.0 1.0 100 Grassy Lake 7265 -M .0 * 2.0 2.0 100 Gros Ventre Summit 8750 .2 .8 25* 1.8 1.0 180 Gunsight Pass 9820 1.0 .2 500* 2.8 1.2 233 Lewis Lake Divide 7850 .1 .0 * 1.3 1.7 76 Loomis Park 8240 .2 .0 * 1.2 1.2 100 Phillips Bench 8200 .2 .0 * 1.9 1.4 136 Salt River Summit 7640 .0 .0 * .9 1.0 90 Snake River Station 6920 .0 .0 * 1.4 1.3 108 Somsen Ranch 6800 -M .0 * 2.1 1.1 191 Spring Creek Divide 9000 .3 .5 60* 1.3 1.2 108 Thumb Divide 7980 .2 .0 * .8 1.3 62 Togwotee Pass 9580 .1 1.4 7* 1.6 2.0 80 Triple Peak 8500 -M .2 * 1.1 1.2 92 Two Ocean Plateau 9240 1.2 2.0 60* 2.3 1.6 144 Willow Creek 8080 -M .0 * 3.1 2.2 141 Younts Peak 8350 -M .5 * -M 1.1 * ----- ----- Basin Index (%) 59* 122 MADISON HEADWATERS IN WYOMING Black Bear 8170 .2 1.6 12* 2.3 2.4 96 Canyon 7870 .0 -M * .9 -M * Madison Plateau 7750 .0 .6 0* 1.3 1.8 72 West Yellowstone 6700 .0 .0 * .8 1.0 80 Whiskey Creek 6800 .0 .0 * 1.2 1.2 100 ----- ----- Basin Index (%) 9* 88 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 1.1 1.4 79* 1.8 1.4 129 Canyon 7870 .0 -M * .9 -M * Evening Star 9200 1.0 1.2 83* 3.5 2.1 167 Fisher Creek 9100 .0 1.4 0* 1.7 1.9 89 Monument Peak 8850 .4 1.1 36* 2.2 1.7 129 Northeast Entrance 7350 .0 .0 * .8 1.0 80 Parker Peak 9400 .3 1.2 25* 2.5 1.8 139 Sylvan Lake 8420 .0 .8 0* 3.0 2.0 150 Thumb Divide 7980 .2 .0 * .8 1.3 62 Two Ocean Plateau 9240 1.2 2.0 60* 2.3 1.6 144 White Mill 8700 .0 1.0 0* 1.3 1.4 93 Wolverine 7650 .1 .0 * 2.0 1.3 154 ----- ----- Basin Index (%) 43* 125 WIND RIVER Burroughs Creek 8750 .0 -M * .9 -M * Castle Creek 8400 .0 .0 * 1.2 .9 133 Cold Springs 9630 .7 .0 * 1.8 1.0 180 Deer Park 9700 .0 .7 0* 2.0 1.4 143 Hobbs Park 10100 2.6 .9 289* 3.7 1.2 308 Kirwin 9550 2.6 1.0 260* 3.6 1.2 300 Little Warm 9370 .5 .4 125* 2.0 1.2 167 South Pass 9040 .1 .2 50* 1.7 1.1 155 St. Lawrence Alt 8620 .0 -M * 2.0 -M * Togwotee Pass 9580 .1 1.4 7* 1.6 2.0 80 Townsend Creek 8700 1.1 .0 * 3.1 1.2 258 ----- ----- Basin Index (%) 167* 185 BIGHORN BASIN Bald Mtn. 9380 2.0 2.0 100* 2.5 1.8 139 Bear Trap Meadow 8200 .2 .1 200* 2.9 1.2 242 Bone Springs Div 9350 1.6 1.4 114* 2.9 1.8 161 Grave Springs 8550 .1 .2 50* 1.9 1.0 190 Kirwin 9550 2.6 1.0 260* 3.6 1.2 300 Marquette 8760 4.3 .2 2150* 6.6 1.4 471 Middle Powder 7760 .1 .2 50* 3.2 1.3 246 Owl Creek 8975 .1 .1 100* 1.9 1.0 190 Powder River Pass 9480 .7 .8 88* 2.4 1.4 171 Shell Creek 9580 2.1 1.8 117 3.1 1.6 194 Timber Creek 7950 2.0 .0 * 4.5 1.2 375 ----- ----- Basin Index (%) 203* 238 SHOSHONE RIVER Blackwater 9780 2.0 1.6 125* 2.8 1.9 147 Evening Star 9200 1.0 1.2 83* 3.5 2.1 167 Marquette 8760 4.3 .2 2150* 6.6 1.4 471 Sylvan Lake 8420 .0 .8 0* 3.0 2.0 150 Sylvan Road 7120 .0 .0 * 2.0 1.4 143 Younts Peak 8350 -M .5 * -M 1.1 * ----- ----- Basin Index (%) 192* 203 POWDER RIVER Bear Trap Meadow 8200 .2 .1 200* 2.9 1.2 242 Cloud Peak Reservoir 9860 3.3 .9 367* 5.3 1.8 294 Grave Springs 8550 .1 .2 50* 1.9 1.0 190 Hansen Sawmill 8360 1.8 .0 * 2.5 1.2 208 Middle Powder 7760 .1 .2 50* 3.2 1.3 246 Powder River Pass 9480 .7 .8 88* 2.4 1.4 171 Soldier Park 8720 1.6 .0 * 3.5 1.3 269 ----- ----- Basin Index (%) 355* 236 TONGUE RIVER Big Goose 7990 1.2 .2 600* 3.8 1.4 271 Bone Springs Div 9350 1.6 1.4 114* 2.9 1.8 161 Burgess Junction 7880 1.6 .5 320* 4.3 1.4 307 Dome Lake 8880 2.2 .8 275* 4.1 1.5 273 Little Goose 8870 2.1 .0 * 4.5 1.5 300 Sucker Creek 8880 2.4 .8 300* 4.8 1.5 320 Tie Creek 6870 .1 .0 * 5.0 1.2 417 ----- ----- Basin Index (%) 303* 285 BELLE FOURCHE Blind Park 6890 .1 .0 * 1.7 1.1 155 Cole Canyon 5910 .1 .0 * 1.2 1.0 120 North Rapid Creek 6130 .0 .0 * 2.1 .9 233 ----- ----- Basin Index (%) * 167 CHEYENNE RIVER BASIN Blind Park 6890 .1 .0 * 1.7 1.1 155 North Rapid Creek 6130 .0 .0 * 2.1 .9 233 ----- ----- Basin Index (%) * 190 UPPER N. PLATTE Arapaho Ridge 10976 .2 1.0 20* 1.2 1.6 75 Blackhall Mtn 9839 .9 1.2 75* 2.4 2.4 100 Cinnabar Park 9707 .0 .5 0* .9 1.5 60 Columbine 9167 -M .0 * 1.3 1.8 72 Divide Peak 8730 .2 .2 100* 2.8 1.8 156 Joe Wright 10158 .1 .4 25* 1.8 2.3 78 Laprele Creek 8390 .9 .0 * 2.8 1.0 280 Med Bow 10512 1.2 -M * 2.3 -M * Never Summer 10323 1.3 1.0 130* 1.3 1.8 72 North French Creek 10153 .6 .8 75* 1.9 2.0 95 Old Battle 9860 .6 1.2 50* 2.0 2.3 87 Rawah 9069 .2 .0 * 1.7 1.6 106 Sage Creek Basin 7850 .1 .0 * 1.4 1.1 127 Sand Lake 10098 1.9 1.4 136* 2.1 1.7 124 South Brush Creek 8495 -M .0 * 1.3 1.0 130 Tower 10620 1.2 1.0 120* 2.4 2.3 104 Webber Springs 9260 .1 .4 25* 1.4 1.8 78 Whiskey Park 9020 .0 .2 0* 1.4 1.8 78 Willow Creek Pass 9523 .9 .2 450* 1.3 1.2 108 Zirkel 9338 .1 .0 * 1.3 2.2 59 ----- ----- Basin Index (%) 98* 98 SWEETWATER Deer Park 9700 .0 .7 0* 2.0 1.4 143 Larsen Creek 9000 -M .0 * 1.1 .8 138 South Pass 9040 .1 .2 50* 1.7 1.1 155 ----- ----- Basin Index (%) 11* 145 LOWER N. PLATTE Casper Mtn. 7920 3.2 .0 * 5.4 1.2 450 Laprele Creek 8390 .9 .0 * 2.8 1.0 280 Reno Hill 8430 2.2 .6 367* 4.4 1.3 338 Windy Peak 7915 .2 .0 * 2.0 1.0 200 ----- ----- Basin Index (%) 1083* 324 LARAMIE RIVER Brooklyn Lake 10250 .1 .2 50* 1.0 1.0 100 Cinnabar Park 9707 .0 .5 0* .9 1.5 60 Crow Creek 8335 .0 .0 * 1.6 1.0 160 Deadman Hill 10239 1.4 1.2 117* 1.4 1.3 108 Rawah 9069 .2 .0 * 1.7 1.6 106 Roach 9740 .2 .5 40* 1.3 1.2 108 Windy Peak 7915 .2 .0 * 2.0 1.0 200 ----- ----- Basin Index (%) 88* 115 S. PLATTE Crow Creek 8335 .0 .0 * 1.6 1.0 160 ----- ----- Basin Index (%) * 160 LITTLE SNAKE RIVER Battle Mountain 7498 .0 .0 * 1.7 1.2 142 Divide Peak 8730 .2 .2 100* 2.8 1.8 156 Elk River 8739 .3 .0 * 1.1 1.4 79 Elkhead Divide 8800 .1 -M * 1.4 -M * Little Snake River 8928 .1 .0 * 1.7 2.6 65 Old Battle 9860 .6 1.2 50* 2.0 2.3 87 Sage Creek Basin 7850 .1 .0 * 1.4 1.1 127 Sandstone RS 8152 -M .0 * 1.2 1.2 100 Whiskey Park 9020 .0 .2 0* 1.4 1.8 78 ----- ----- Basin Index (%) 81* 99 UPPER GREEN RIVER Big Sandy Opening 9080 -M .6 * 1.3 1.2 108 Blind Bull Sum 8650 .1 .6 17* 1.0 1.0 100 East Rim Divide 7930 -M .0 * 1.0 .6 167 Elkhart Park G.S. 9400 .0 .4 0* 2.0 1.4 143 Gros Ventre Summit 8750 .2 .8 25* 1.8 1.0 180 Gunsight Pass 9820 1.0 .2 500* 2.8 1.2 233 Indian Creek 9425 .3 .7 43* 1.5 1.4 107 Kendall R.S. 7740 .0 .0 * 1.5 .8 188 Larsen Creek 9000 -M .0 * 1.1 .8 138 Loomis Park 8240 .2 .0 * 1.2 1.2 100 New Fork Lake 8340 -M .0 * -M .7 * Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 -M .0 * .5 .8 62 Spring Creek Divide 9000 .3 .5 60* 1.3 1.2 108 Triple Peak 8500 -M .2 * 1.1 1.2 92 ----- ----- Basin Index (%) 66* 131 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 -M * 1.4 -M * Buck Pasture 9632 .0 -M * 1.8 -M * EF Blacks Fork GS 9360 .0 -M * 1.5 -M * Hams Fork 7840 -M .0 * -M .9 * Henrys Fork 10182 -M -M * 2.0 -M * Hewinta 9500 .0 .0 * 1.3 1.2 108 Hickerson Park 9122 .0 .0 * 2.3 .9 256 Hole-in-Rock 9168 .0 .0 * 1.6 1.0 160 Indian Creek 9425 .3 .7 43* 1.5 1.4 107 Kelley R.S. 8180 .3 .0 * 1.0 1.0 100 Spirit Lk 10235 .0 .0 * 2.6 1.4 186 Steel Creek Park 10158 .5 .6 83* 1.8 1.2 150 ----- ----- Basin Index (%) 85* 149 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 1.1 -M * Bug Lake 7987 .3 .0 * 1.2 1.1 109 Burts Miller Ranch 8000 .1 .0 * 1.1 .6 183 Chalk Creek #1 9171 .2 .0 * 2.1 1.4 150 Giveout 6930 -M .0 * .6 .9 67 Hayden Fork 9130 .0 .0 * 2.1 1.4 150 Kelley R.S. 8180 .3 .0 * 1.0 1.0 100 Lily Lake 9133 .1 .0 * 1.6 1.2 133 Monte Cristo 8932 .1 .0 * 1.7 1.4 121 Salt River Summit 7640 .0 .0 * .9 1.0 90 Spring Creek Divide 9000 .3 .5 60* 1.3 1.2 108 Trial Lake 9992 .0 .0 * 1.8 1.4 129 ----- ----- Basin Index (%) 280* 122 ----------------------------------------------------------------------------- -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.