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 WEDNESDAY: OCTOBER 4 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 .0 .0 * .5 .2 250 Black Bear 8170 1.4 .0 * .2 .4 50 Blind Bull Sum 8650 1.4 .0 * .2 .3 67 Cottonwood Creek 7670 .1 .0 * .0 .3 0 East Rim Divide 7930 .0 .0 * .0 .1 0 Grand Targhee 9260 4.3 .8 538* 1.0 .4 250 Granite Creek 6770 .1 .0 * .4 .2 200 Grassy Lake 7265 .2 .0 * .2 .5 40 Gros Ventre Summit 8750 .7 .0 * .6 .1 600 Gunsight Pass 9820 1.4 .0 * .4 .2 200 Lewis Lake Divide 7850 .0 .0 * .1 .4 25 Phillips Bench 8200 .0 .0 * .6 .3 200 Salt River Summit 7760 .2 .0 * -M .2 * Snake River Station 6920 .0 .0 * .2 .3 67 Spring Creek Divide 9000 1.0 .0 * .2 .2 100 Thumb Divide 7980 .0 .0 * .2 .3 67 Togwotee Pass 9580 -M .0 * 1.4 .2 700 Two Ocean Plateau 9240 4.4 .0 * .6 .3 200 Willow Creek 8380 .1 .0 * .4 .3 133 Younts Peak 8350 .0 .0 * .1 .3 33 ----- ----- Basin Index (%) 1912* 138 MADISON-GALLATIN Black Bear 8170 1.4 .0 * .2 .4 50 Canyon 7870 .0 .0 * .1 .2 50 Madison Plateau 7750 .3 .0 * .2 .4 50 West Yellowstone 6700 .0 .0 * .1 .3 33 Whiskey Creek 6800 .1 .0 * .1 .3 33 ----- ----- Basin Index (%) * 44 YELLOWSTONE Beartooth Lake 9360 1.5 .3 500* .2 .3 67 Burnt Mtn 5880 .0 .0 * .0 .4 0 Canyon 7870 .0 .0 * .1 .2 50 Cole Creek 7850 1.2 .2 600* .1 .4 25 Evening Star 9200 2.2 .0 * .1 .4 25 Fisher Creek 9100 3.3 .0 * .2 .4 50 Northeast Entrance 7350 .0 .0 * .0 .2 0 Parker Peak 9400 2.6 .2 1300* .1 .4 25 Sylvan Lake 8420 2.6 .0 * .5 .4 125 Thumb Divide 7980 .0 .0 * .2 .3 67 Two Ocean Plateau 9240 4.4 .0 * .6 .3 200 White Mill 8700 3.4 .0 * .1 .4 25 Wolverine 7650 .0 .0 * .0 .3 0 ----- ----- Basin Index (%) 3029* 50 WIND RIVER Burroughs Creek 8750 1.0 -M * .6 -M * Castle Creek 8400 .4 -M * .6 -M * Cold Springs 9630 .7 .0 * .2 .3 67 Deer Park 9700 .7 .0 * .3 .2 150 Hobbs Park 10100 1.2 .0 * .4 .3 133 Kirwin 9550 2.1 .0 * .6 .2 300 Little Warm 9370 1.4 .0 * .2 .2 100 Owl Creek 8975 .5 .0 * .8 .2 400 South Pass 9040 .2 .0 * .1 .2 50 St. Lawrence Alt 8620 .5 .0 * .7 .3 233 Togwotee Pass 9580 -M .0 * 1.4 .2 700 Townsend Creek 8700 .0 .0 * .3 .3 100 ----- ----- Basin Index (%) * 208 BIGHORN BASIN Bald Mtn. 9380 1.7 .0 * .5 .3 167 Bear Trap Meadow 8200 .5 .0 * .9 .2 450 Bone Springs Div 9350 .7 .3 233* .6 .3 200 Grave Springs 8550 .2 .0 * .3 .3 100 Kirwin 9550 2.1 .0 * .6 .2 300 Marquette 8760 .6 -M * .9 -M * Middle Powder 7760 .3 .0 * .2 .3 67 Owl Creek 8975 .5 .0 * .8 .2 400 Powder River Pass 9480 1.3 .0 * 1.0 .3 333 Shell Creek 9580 3.0 .5 600* .7 .3 233 Timber Creek 7950 .6 .0 * .9 .3 300 ----- ----- Basin Index (%) 1362* 241 SHOSHONE RIVER Blackwater 9780 2.8 .0 * .3 .4 75 Evening Star 9200 2.2 .0 * .1 .4 25 Marquette 8760 .6 -M * .9 -M * Sylvan Road 7120 .0 .0 * .2 .3 67 Younts Peak 8350 .0 .0 * .1 .3 33 ----- ----- Basin Index (%) * 50 POWDER RIVER Bear Trap Meadow 8200 .5 .0 * .9 .2 450 Cloud Peak Reservoir 9860 .8 .0 * 1.1 .3 367 Grave Springs 8550 .2 .0 * .3 .3 100 Hansen Sawmill 8360 .4 .0 * .6 .2 300 Middle Powder 7760 .3 .0 * .2 .3 67 Powder River Pass 9480 1.3 .0 * 1.0 .3 333 Soldier Park 8720 .3 -M * .7 -M * ----- ----- Basin Index (%) * 256 TONGUE RIVER Big Goose 7990 .0 .0 * .1 .2 50 Bone Springs Div 9350 .7 .3 233* .6 .3 200 Burgess Junction 7880 .1 .0 * .3 .3 100 Dome Lake 8880 .2 .0 * .4 .4 100 Little Goose 8870 .1 -M * .3 -M * Sucker Creek 8880 .1 .0 * .1 .3 33 Tie Creek 6870 .0 .0 * .2 .3 67 ----- ----- Basin Index (%) 367* 94 BELLE FOURCHE Cole Canyon 5910 .0 .0 * .4 .1 400 ----- ----- Basin Index (%) * 400 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * .6 .2 300 North Rapid Creek 6130 .0 .0 * .3 .2 150 ----- ----- Basin Index (%) * 225 UPPER N. PLATTE Arapaho Ridge 10960 2.3 .1 2300* 2.1 .4 525 Blackhall Mtn 9820 2.2 -M * 1.8 -M * Columbine 9160 1.0 .0 * 1.7 .3 567 Divide Peak 8880 .4 .0 * .7 .4 175 Joe Wright 10120 2.3 .0 * 2.5 .3 833 Laprele Creek 8375 .1 .0 * .1 .2 50 Med Bow 10500 -M -M * 1.0 -M * North French Creek 10130 1.5 .0 * 1.2 .3 400 Never Summer 10280 2.0 .0 * -M -M * Old Battle 10000 1.5 .0 * 1.1 .5 220 Rawah 9020 1.3 .0 * 1.6 .3 533 Sage Creek Basin 7850 -M .0 * .3 .3 100 Sand Lake 10050 .7 .0 * .8 .3 267 South Brush Creek 8440 .4 .0 * .7 .3 233 Tower 10500 -M .0 * 2.4 .4 600 Webber Springs 9250 .6 .0 * .8 .4 200 Willow Creek Pass 9540 1.7 .0 * 1.7 .1 1700 Zirkel 9340 -M .0 * 1.2 .5 240 ----- ----- Basin Index (%) 15800* 378 SWEETWATER Deer Park 9700 .7 .0 * .3 .2 150 Larsen Creek 9000 .4 .0 * .6 -M * South Pass 9040 .2 .0 * .1 .2 50 ----- ----- Basin Index (%) * 100 LOWER N. PLATTE Casper Mtn. 7900 .3 .0 * -M .2 * Laprele Creek 8375 .1 .0 * .1 .2 50 Reno Hill 8400 .2 .0 * .2 .2 100 Windy Peak 7900 .2 .0 * .1 .2 50 ----- ----- Basin Index (%) * 67 LARAMIE RIVER Brooklyn Lake 10240 .6 .0 * .7 .2 350 Cinnabar Park 9574 .5 .0 * .9 .2 450 Crow Creek 8330 .4 .0 * .6 .2 300 Deadman Hill 10220 1.7 .0 * 1.6 .1 1600 Rawah 9020 1.3 .0 * 1.6 .3 533 Roach 9700 1.6 .0 * 1.7 .2 850 ----- ----- Basin Index (%) * 592 S. PLATTE Black Mountain 8920 .8 -M * 1.1 -M * Crow Creek 8330 .4 .0 * .6 .2 300 Deadman Hill 10220 1.7 .0 * 1.6 .1 1600 ----- ----- Basin Index (%) * 733 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * .6 .3 200 Divide Peak 8880 .4 .0 * .7 .4 175 Elk River 8700 -M .0 * 2.0 .3 667 Little Snake River 8915 .8 .0 * 3.0 .4 750 Old Battle 10000 1.5 .0 * 1.1 .5 220 Sage Creek Basin 7850 -M .0 * .3 .3 100 Sandstone RS 8150 .5 .0 * .8 .3 267 Whiskey Park 8950 -M .0 * 1.5 .4 375 ----- ----- Basin Index (%) * 345 UPPER GREEN RIVER Big Sandy Opening 9080 .6 .0 * .6 .2 300 Blind Bull Sum 8650 1.4 .0 * .2 .3 67 East Rim Divide 7930 .0 .0 * .0 .1 0 Elkhart Park G.S. 9400 .5 .0 * .5 .2 250 Gros Ventre Summit 8750 .7 .0 * .6 .1 600 Gunsight Pass 9820 1.4 .0 * .4 .2 200 Kendall R.S. 7740 .2 .0 * -M .1 * Loomis Park 8240 .1 .0 * .2 .2 100 New Fork Lake 8340 .0 .0 * -M .1 * Pocket Creek 9360 .8 -M * .5 -M * Snider Basin 8060 .0 .0 * .1 .1 100 Spring Creek Divide 9000 1.0 .0 * .2 .2 100 Triple Peak 8500 .0 .0 * .4 .2 200 ----- ----- Basin Index (%) * 178 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 -M * .2 -M * Buck Pasture 9632 .2 -M * .3 -M * EF Blacks Fork GS 9360 .0 -M * .1 -M * Hams Fork 7840 -M .0 * -M .2 * Hewinta 9500 .0 .0 * .3 .2 150 Hickerson Park 9122 .3 .0 * .2 .3 67 Hole-in-Rock 9168 .0 .0 * .2 .3 67 Indian Creek 9425 .7 .0 * .1 .2 50 Kelley R.S. 8180 .3 .0 * .2 .2 100 Spirit Lk 10235 .3 -M * .3 -M * Steel Creek Park 10158 1.1 .0 * .3 .2 150 ----- ----- Basin Index (%) * 93 UPPER BEAR RIVER Bear River RS 8777 .0 -M * .3 -M * Bug Lake 7987 .9 .0 * .2 .3 67 Burts Miller Ranch 8000 .0 -M * .2 -M * Chalk Creek #1 9171 .6 .0 * .4 .3 133 Hayden Fork 9130 .2 .0 * .4 .3 133 Kelley R.S. 8180 .3 .0 * .2 .2 100 Lily Lake 9133 .0 .0 * .2 .3 67 Monte Cristo 8932 .4 .0 * .5 .3 167 Salt River Summit 7760 .2 .0 * -M .2 * ----- ----- Basin Index (%) * 112 ----------------------------------------------------------------------------- -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.