Supercell over Laramie
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Wyoming Snow Precipitation Update


United States Natural Resources Water and Climate Center 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 22 , 2021 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 .0 .0 * 1.4 1.4 100 Blind Bull Sum 8650 .9 .7 129* 2.0 1.0 200 Cottonwood Creek 7670 .1 .0 * 3.4 1.7 200 East Rim Divide 7930 .1 .0 * 1.5 .8 188 Grand Targhee 9260 2.2 2.5 88* 4.8 3.0 160 Granite Creek 6770 -M .0 * 1.5 1.0 150 Grassy Lake 7265 .0 .0 * 2.7 2.2 123 Gros Ventre Summit 8750 1.2 .8 150* 1.2 1.2 100 Gunsight Pass 9820 1.4 .4 350* 2.5 1.4 179 Lewis Lake Divide 7850 .0 .0 * 3.7 1.8 206 Loomis Park 8240 .0 .0 * 1.8 1.3 138 Phillips Bench 8200 .2 .0 * 2.4 1.7 141 Salt River Summit 7640 .0 .0 * 2.7 1.0 270 Snake River Station 6920 .1 .0 * 1.7 1.4 121 Somsen Ranch 6800 .0 .0 * 3.8 1.2 317 Spring Creek Divide 9000 1.4 .4 350* 3.1 1.2 258 Thumb Divide 7980 .4 .0 * 2.1 1.4 150 Togwotee Pass 9580 1.4 -M * 2.2 -M * Triple Peak 8500 .2 .4 50* 2.8 1.4 200 Two Ocean Plateau 9240 1.5 2.0 75* 1.4 2.0 70 Willow Creek 8080 .1 .0 * 3.9 2.4 162 Younts Peak 8350 .1 -M * .7 -M * ----- ----- Basin Index (%) 136* 165 MADISON HEADWATERS IN WYOMING Black Bear 8170 1.2 1.7 71* 2.4 2.8 86 Canyon 7870 -M -M * -M -M * Madison Plateau 7750 .8 .4 200* 1.6 1.8 89 West Yellowstone 6700 .1 .0 * 1.2 1.0 120 Whiskey Creek 6800 .3 .0 * 1.5 1.4 107 ----- ----- Basin Index (%) 114* 96 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 .4 1.6 25* .6 1.5 40 Canyon 7870 -M -M * -M -M * Evening Star 9200 .3 1.2 25* .9 2.2 41 Fisher Creek 9100 .9 1.5 60* 1.7 2.2 77 Monument Peak 8850 1.2 1.2 100* 2.0 1.8 111 Northeast Entrance 7350 .0 .0 * .9 1.1 82 Parker Peak 9400 .2 1.4 14* .7 2.0 35 Sylvan Lake 8420 .1 -M * 1.8 -M * Thumb Divide 7980 .4 .0 * 2.1 1.4 150 Two Ocean Plateau 9240 1.5 2.0 75* 1.4 2.0 70 White Mill 8700 .9 1.0 90* 1.2 1.7 71 Wolverine 7650 .0 .0 * .8 1.4 57 ----- ----- Basin Index (%) 59* 71 WIND RIVER Burroughs Creek 8750 .1 -M * 2.0 -M * Castle Creek 8400 .1 .0 * 1.2 1.0 120 Cold Springs 9630 -M .2 * -M 1.0 * Deer Park 9700 2.0 -M * 3.8 -M * Hobbs Park 10100 3.1 -M * 4.1 -M * Kirwin 9550 1.6 -M * 2.0 -M * Little Warm 9370 2.2 .6 367* 2.8 1.2 233 South Pass 9040 2.2 -M * 3.9 -M * St. Lawrence Alt 8620 1.6 -M * 3.2 -M * Togwotee Pass 9580 1.4 -M * 2.2 -M * Townsend Creek 8700 2.8 -M * 4.0 -M * ----- ----- Basin Index (%) 383* 182 BIGHORN BASIN Bald Mtn. 9380 2.7 -M * 3.4 -M * Bear Trap Meadow 8200 1.1 -M * 2.1 -M * Bone Springs Div 9350 1.9 -M * 2.5 -M * Grave Springs 8550 1.2 -M * 2.6 -M * Kirwin 9550 1.6 -M * 2.0 -M * Marquette 8760 .8 -M * 2.0 -M * Middle Powder 7760 1.0 -M * 2.5 -M * Owl Creek 8975 2.0 -M * 2.5 -M * Powder River Pass 9480 1.4 -M * 1.8 -M * Shell Creek 9580 2.0 -M * 2.6 -M * Timber Creek 7950 1.2 -M * 1.8 -M * ----- ----- Basin Index (%) * * SHOSHONE RIVER Blackwater 9780 1.0 -M * 1.4 -M * Evening Star 9200 .3 1.2 25* .9 2.2 41 Marquette 8760 .8 -M * 2.0 -M * Sylvan Lake 8420 .1 -M * 1.8 -M * Sylvan Road 7120 .0 -M * 1.1 -M * Younts Peak 8350 .1 -M * .7 -M * ----- ----- Basin Index (%) 25* 41 POWDER RIVER Bear Trap Meadow 8200 1.1 -M * 2.1 -M * Cloud Peak Reservoir 9860 2.1 -M * 3.6 -M * Grave Springs 8550 1.2 -M * 2.6 -M * Hansen Sawmill 8360 2.4 -M * 3.2 -M * Middle Powder 7760 1.0 -M * 2.5 -M * Powder River Pass 9480 1.4 -M * 1.8 -M * Soldier Park 8720 2.0 -M * 3.1 -M * ----- ----- Basin Index (%) * * TONGUE RIVER Big Goose 7990 1.0 -M * 3.0 -M * Bone Springs Div 9350 1.9 -M * 2.5 -M * Burgess Junction 7880 1.2 -M * 2.3 -M * Dome Lake 8880 1.4 -M * 2.6 -M * Little Goose 8870 1.1 -M * 3.2 -M * Sucker Creek 8880 1.7 -M * 2.3 -M * Tie Creek 6870 .8 -M * 2.8 -M * ----- ----- Basin Index (%) * * BELLE FOURCHE Blind Park 6890 .1 .0 * 2.3 1.2 192 Cole Canyon 5910 1.0 .0 * 3.0 1.0 300 North Rapid Creek 6130 1.1 .0 * 2.2 1.1 200 ----- ----- Basin Index (%) * 227 CHEYENNE RIVER BASIN Blind Park 6890 .1 .0 * 2.3 1.2 192 North Rapid Creek 6130 1.1 .0 * 2.2 1.1 200 ----- ----- Basin Index (%) * 196 UPPER N. PLATTE Arapaho Ridge 10960 1.3 1.4 93* 1.7 1.9 89 Blackhall Mtn 9820 1.9 1.2 158* 3.0 3.0 100 Cinnabar Park 9574 1.1 .7 157* 2.1 1.8 117 Columbine 9160 .0 .0 * -M 2.0 * Divide Peak 8880 -M .3 * -M 2.2 * Joe Wright 10120 1.5 .4 375* -M 2.6 * Laprele Creek 8375 1.5 .0 * 2.6 1.2 217 Med Bow 10500 2.4 -M * 3.1 -M * Never Summer 10280 1.3 1.4 93* 1.6 1.9 84 North French Creek 10130 2.1 1.0 210* 3.2 2.1 152 Old Battle 10000 2.2 1.2 183* 3.9 2.5 156 Rawah 9020 .9 .0 * 1.8 1.8 100 Sage Creek Basin 7850 .1 .0 * 1.0 1.1 91 Sand Lake 10050 2.7 1.7 159* 3.3 1.8 183 South Brush Creek 8440 .8 .0 * 1.9 1.4 136 Tower 10500 2.6 1.4 186* 3.2 2.6 123 Webber Springs 9250 .6 .4 150* 2.8 2.3 122 Whiskey Park 8950 1.8 .4 450* 3.4 2.1 162 Willow Creek Pass 9540 .7 .2 350* 1.4 1.4 100 Zirkel 9340 -M .0 * -M 2.6 * ----- ----- Basin Index (%) 203* 128 SWEETWATER Deer Park 9700 2.0 -M * 3.8 -M * Larsen Creek 9000 .1 .0 * 3.5 .9 389 South Pass 9040 2.2 -M * 3.9 -M * ----- ----- Basin Index (%) * 389 LOWER N. PLATTE Casper Mtn. 7900 2.4 .0 * 4.6 1.2 383 Laprele Creek 8375 1.5 .0 * 2.6 1.2 217 Reno Hill 8400 2.5 .6 417* 4.7 1.5 313 Windy Peak 7900 1.9 .0 * 3.1 1.0 310 ----- ----- Basin Index (%) 1383* 306 LARAMIE RIVER Brooklyn Lake 10240 .7 .2 350* 1.9 1.4 136 Cinnabar Park 9574 1.1 .7 157* 2.1 1.8 117 Crow Creek 8330 .6 .0 * 1.7 1.0 170 Deadman Hill 10220 .8 1.3 62* 1.3 1.6 81 Rawah 9020 .9 .0 * 1.8 1.8 100 Roach 9700 1.2 .6 200* 1.9 1.4 136 Windy Peak 7900 1.9 .0 * 3.1 1.0 310 ----- ----- Basin Index (%) 257* 138 S. PLATTE Crow Creek 8330 .6 .0 * 1.7 1.0 170 ----- ----- Basin Index (%) * 170 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 2.0 1.2 167 Divide Peak 8880 -M .3 * -M 2.2 * Elk River 8700 .2 .0 * 2.8 1.6 175 Elkhead Divide 8780 -M -M * 2.3 -M * Little Snake River 8915 .0 .0 * 3.2 2.8 114 Old Battle 10000 2.2 1.2 183* 3.9 2.5 156 Sage Creek Basin 7850 .1 .0 * 1.0 1.1 91 Sandstone RS 8150 .0 .0 * 2.0 1.2 167 Whiskey Park 8950 1.8 .4 450* 3.4 2.1 162 ----- ----- Basin Index (%) 269* 146 UPPER GREEN RIVER Big Sandy Opening 9080 .1 .7 14* 2.8 1.2 233 Blind Bull Sum 8650 .9 .7 129* 2.0 1.0 200 East Rim Divide 7930 .1 .0 * 1.5 .8 188 Elkhart Park G.S. 9400 .2 .4 50* 1.9 1.4 136 Gros Ventre Summit 8750 1.2 .8 150* 1.2 1.2 100 Gunsight Pass 9820 1.4 .4 350* 2.5 1.4 179 Indian Creek 9425 1.3 .8 162* 3.0 1.6 188 Kendall R.S. 7740 .0 .0 * 1.7 .9 189 Larsen Creek 9000 .1 .0 * 3.5 .9 389 Loomis Park 8240 .0 .0 * 1.8 1.3 138 New Fork Lake 8340 .0 .0 * 1.6 .8 200 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 .0 .0 * 2.4 .8 300 Spring Creek Divide 9000 1.4 .4 350* 3.1 1.2 258 Triple Peak 8500 .2 .4 50* 2.8 1.4 200 ----- ----- Basin Index (%) 150* 200 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 -M * 1.3 -M * Buck Pasture 9632 .4 -M * 2.7 -M * EF Blacks Fork GS 9360 .4 .0 * 2.4 1.2 200 Hams Fork 7840 .1 .0 * 3.0 .9 333 Henrys Fork 10182 -M -M * 2.2 -M * Hewinta 9500 .0 .0 * 1.9 1.3 146 Hickerson Park 9122 .0 .0 * 1.4 1.0 140 Hole-in-Rock 9168 .4 .0 * 2.1 1.2 175 Indian Creek 9425 1.3 .8 162* 3.0 1.6 188 Kelley R.S. 8180 .1 .0 * 2.9 1.0 290 Spirit Lk 10235 .7 .0 * 2.5 1.4 179 Steel Creek Park 10158 1.3 .6 217* 2.9 1.5 193 ----- ----- Basin Index (%) 307* 199 UPPER BEAR RIVER Bear River RS 8777 .1 -M * 2.1 -M * Bug Lake 7987 1.2 .0 * 3.5 1.2 292 Burts Miller Ranch 8000 .0 .0 * 1.0 .7 143 Chalk Creek #1 9171 .8 .0 * 3.5 1.6 219 Giveout 6930 .0 .0 * 2.4 .9 267 Hayden Fork 9130 .0 .0 * 3.1 1.6 194 Kelley R.S. 8180 .1 .0 * 2.9 1.0 290 Lily Lake 9133 .0 .0 * 2.5 1.5 167 Monte Cristo 8932 1.3 .0 * 4.0 1.6 250 Salt River Summit 7640 .0 .0 * 2.7 1.0 270 Spring Creek Divide 9000 1.4 .4 350* 3.1 1.2 258 Trial Lake 9992 1.3 .1 1300* 3.6 1.4 257 ----- ----- Basin Index (%) 1220* 236 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.