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 20 , 2016 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 .9 .0 * 5.3 1.2 442 Black Bear 8170 1.8 1.5 120* 6.4 2.3 278 Blind Bull Sum 8650 2.4 .4 600* 4.1 1.3 315 Cottonwood Creek 7670 2.3 .0 * -M 1.6 * East Rim Divide 7930 .6 .0 * 2.9 .8 362 Grand Targhee 9260 8.0 3.0 267* 9.2 3.9 236 Granite Creek 6770 .5 .0 * 4.3 1.2 358 Grassy Lake 7265 1.5 .0 * 7.9 2.1 376 Gros Ventre Summit 8750 .7 .9 78* 3.3 1.1 300 Gunsight Pass 9820 1.0 .5 200* 3.9 1.4 279 Lewis Lake Divide 7850 1.6 .0 * 6.8 1.9 358 Phillips Bench 8200 1.2 .0 * 6.4 1.4 457 Salt River Summit 7760 1.2 .0 * 3.9 1.0 390 Snake River Station 6920 .6 .0 * 5.4 1.7 318 Spring Creek Divide 9000 2.6 .4 650* 5.3 1.3 408 Thumb Divide 7980 .8 .0 * 4.2 1.4 300 Togwotee Pass 9580 2.5 1.7 147* 4.5 1.6 281 Two Ocean Plateau 9240 4.9 1.9 258* 5.9 1.8 328 Willow Creek 8380 2.1 .0 * 7.4 2.2 336 Younts Peak 8350 -M .5 * -M 1.4 * ----- ----- Basin Index (%) 361* 328 MADISON-GALLATIN Black Bear 8170 1.8 1.5 120* 6.4 2.3 278 Canyon 7870 .6 .2 300* 3.6 1.3 277 Madison Plateau 7750 1.0 .5 200* 5.7 1.7 335 West Yellowstone 6700 .0 .0 * 3.6 1.3 277 Whiskey Creek 6800 .2 .0 * 3.5 1.4 250 ----- ----- Basin Index (%) 164* 285 YELLOWSTONE Beartooth Lake 9360 1.5 1.5 100* 2.4 1.4 171 Burnt Mtn 5880 .0 .0 * 2.0 2.6 77 Canyon 7870 .6 .2 300* 3.6 1.3 277 Cole Creek 7850 .0 1.6 0* 1.5 2.2 68 Evening Star 9200 3.7 1.2 308* 6.9 2.0 345 Fisher Creek 9100 2.6 1.4 186* 5.4 2.2 245 Northeast Entrance 7350 .2 .0 * 2.9 1.2 242 Parker Peak 9400 3.5 1.4 250* 5.6 1.8 311 Sylvan Lake 8420 2.9 .8 362* 8.0 2.0 400 Thumb Divide 7980 .8 .0 * 4.2 1.4 300 Two Ocean Plateau 9240 4.9 1.9 258* 5.9 1.8 328 White Mill 8700 2.0 1.2 167* 3.3 1.8 183 Wolverine 7650 .9 .0 * 3.4 1.3 262 ----- ----- Basin Index (%) 211* 240 WIND RIVER Burroughs Creek 8750 .0 -M * 1.8 -M * Castle Creek 8400 -M -M * 1.5 -M * Cold Springs 9630 .5 .0 * 1.6 1.2 133 Deer Park 9700 1.1 1.0 110* 2.6 1.7 153 Hobbs Park 10100 1.6 1.0 160* 2.4 1.4 171 Kirwin 9550 .6 .8 75* 1.7 1.2 142 Little Warm 9370 .8 .5 160* 2.7 1.2 225 Owl Creek 8975 .0 .3 0* 1.0 .9 111 South Pass 9040 .7 .2 350* 1.7 1.3 131 St. Lawrence Alt 8620 .0 .0 * 1.9 1.1 173 Togwotee Pass 9580 2.5 1.7 147* 4.5 1.6 281 Townsend Creek 8700 .6 .0 * 1.7 1.4 121 ----- ----- Basin Index (%) 153* 168 BIGHORN BASIN Bald Mtn. 9380 2.7 2.0 135* 2.0 1.8 111 Bear Trap Meadow 8200 .4 .2 200* 1.6 1.2 133 Bone Springs Div 9350 1.2 1.6 75* 2.1 1.8 117 Grave Springs 8550 .5 .3 167* 1.7 1.5 113 Kirwin 9550 .6 .8 75* 1.7 1.2 142 Marquette 8760 .2 -M * 1.5 -M * Middle Powder 7760 .4 .4 100* 1.5 1.7 88 Owl Creek 8975 .0 .3 0* 1.0 .9 111 Powder River Pass 9480 1.1 .6 183* 2.3 1.4 164 Shell Creek 9580 3.0 2.0 150 2.6 1.6 162 Timber Creek 7950 .0 .0 * 1.0 1.4 71 ----- ----- Basin Index (%) 121* 121 SHOSHONE RIVER Blackwater 9780 4.6 1.6 288* 6.4 1.9 337 Evening Star 9200 3.7 1.2 308* 6.9 2.0 345 Marquette 8760 .2 -M * 1.5 -M * Sylvan Road 7120 .7 .0 * 6.0 1.6 375 Younts Peak 8350 -M .5 * -M 1.4 * ----- ----- Basin Index (%) 321* 351 POWDER RIVER Bear Trap Meadow 8200 .4 .2 200* 1.6 1.2 133 Cloud Peak Reservoir 9860 .5 1.0 50* 1.8 1.9 95 Grave Springs 8550 .5 .3 167* 1.7 1.5 113 Hansen Sawmill 8360 .2 .0 * .9 1.3 69 Middle Powder 7760 .4 .4 100* 1.5 1.7 88 Powder River Pass 9480 1.1 .6 183* 2.3 1.4 164 Soldier Park 8720 -M -M * 1.4 -M * ----- ----- Basin Index (%) 124* 109 TONGUE RIVER Big Goose 7990 .0 .5 0* .6 1.8 33 Bone Springs Div 9350 1.2 1.6 75* 2.1 1.8 117 Burgess Junction 7880 .0 .6 0* .9 1.6 56 Dome Lake 8880 .0 1.0 0* 1.3 1.8 72 Little Goose 8870 -M -M * 1.4 -M * Sucker Creek 8880 .1 .8 12* .7 1.8 39 Tie Creek 6870 .0 .0 * 1.1 1.9 58 ----- ----- Basin Index (%) 29* 63 BELLE FOURCHE Cole Canyon 5910 .0 .0 * .5 1.3 38 ----- ----- Basin Index (%) * 38 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 1.5 1.6 94 North Rapid Creek 6130 .0 .0 * .7 1.4 50 ----- ----- Basin Index (%) * 73 UPPER N. PLATTE Arapaho Ridge 10960 1.0 1.5 67* 2.0 1.9 105 Blackhall Mtn 9820 .9 -M * 2.4 -M * Columbine 9160 .0 .0 * 2.5 1.7 147 Divide Peak 8880 1.0 .5 200* 1.3 2.0 65 Joe Wright 10120 .3 .8 38* 2.7 2.2 123 Laprele Creek 8375 .0 .0 * -M 1.2 * Med Bow 10500 2.2 -M * 3.4 -M * North French Creek 10130 1.1 1.2 92* 2.1 2.1 100 Never Summer 10280 .8 1.0 80* 2.0 -M * Old Battle 10000 1.2 1.3 92* 1.4 2.7 52 Rawah 9020 .4 .0 * 1.9 1.4 136 Sage Creek Basin 7850 .0 .0 * .8 1.3 62 Sand Lake 10050 1.9 1.4 136* 1.7 2.0 85 South Brush Creek 8440 .3 .0 * 1.0 1.5 67 Tower 10500 1.5 1.7 88* 2.1 2.7 78 Webber Springs 9250 .4 .2 200* 1.0 2.0 50 Willow Creek Pass 9540 .2 .3 67* 1.3 1.2 108 Zirkel 9340 -M .0 * 2.8 2.6 108 ----- ----- Basin Index (%) 102* 90 SWEETWATER Deer Park 9700 1.1 1.0 110* 2.6 1.7 153 Larsen Creek 9000 .7 .0 * 3.6 -M * South Pass 9040 .7 .2 350* 1.7 1.3 131 ----- ----- Basin Index (%) 208* 143 LOWER N. PLATTE Casper Mtn. 7900 .0 .2 0* .4 1.8 22 Laprele Creek 8375 .0 .0 * -M 1.2 * Reno Hill 8400 -M .6 * -M 1.6 * Windy Peak 7900 .0 .0 * .2 1.1 18 ----- ----- Basin Index (%) 0* 21 LARAMIE RIVER Brooklyn Lake 10240 .7 .3 233* .8 1.5 53 Cinnabar Park 9574 .9 .5 180* 1.7 1.7 100 Crow Creek 8330 .0 .0 * .8 1.3 62 Deadman Hill 10220 1.1 1.1 100* 1.9 1.6 119 Rawah 9020 .4 .0 * 1.9 1.4 136 Roach 9700 .5 .3 167* 1.1 1.6 69 ----- ----- Basin Index (%) 164* 90 S. PLATTE Black Mountain 8920 .6 -M * 1.3 -M * Crow Creek 8330 .0 .0 * .8 1.3 62 Deadman Hill 10220 1.1 1.1 100* 1.9 1.6 119 ----- ----- Basin Index (%) 100* 93 LITTLE SNAKE RIVER Battle Mountain 7440 .2 .0 * 1.3 1.1 118 Divide Peak 8880 1.0 .5 200* 1.3 2.0 65 Elk River 8700 .2 .0 * 1.8 1.6 112 Little Snake River 8915 .5 .3 167* 2.8 2.7 104 Old Battle 10000 1.2 1.3 92* 1.4 2.7 52 Sage Creek Basin 7850 .0 .0 * .8 1.3 62 Sandstone RS 8150 .6 .0 * .8 1.3 62 Whiskey Park 8950 .1 .1 100* 2.2 1.8 122 ----- ----- Basin Index (%) 173* 86 UPPER GREEN RIVER Big Sandy Opening 9080 1.5 .6 250* 3.7 1.1 336 Blind Bull Sum 8650 2.4 .4 600* 4.1 1.3 315 East Rim Divide 7930 .6 .0 * 2.9 .8 362 Elkhart Park G.S. 9400 1.2 .4 300* 3.6 1.2 300 Gros Ventre Summit 8750 .7 .9 78* 3.3 1.1 300 Gunsight Pass 9820 1.0 .5 200* 3.9 1.4 279 Kendall R.S. 7740 .4 .0 * 3.1 .9 344 Loomis Park 8240 .7 .0 * 3.8 1.0 380 New Fork Lake 8340 .7 .0 * 1.4 .8 175 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 .9 .0 * 3.7 .9 411 Spring Creek Divide 9000 2.6 .4 650* 5.3 1.3 408 Triple Peak 8500 2.0 .2 1000* 5.9 1.4 421 ----- ----- Basin Index (%) 432* 339 LOWER GREEN RIVER Blacks Fork Jct 8870 .0 -M * 1.2 -M * Buck Pasture 9700 .1 -M * 1.9 -M * EF Blacks Fork GS 9360 .4 -M * 1.6 -M * Hams Fork 7840 .3 .0 * 2.7 .8 338 Hewinta 9519 -M .0 * 1.2 1.3 92 Hickerson Park 9145 .1 .0 * .8 1.1 73 Hole-in-Rock 9150 .0 .0 * 1.1 1.2 92 Indian Creek 9425 1.9 .8 238* 3.9 1.3 300 Kelley R.S. 8180 1.2 .0 * 3.4 1.1 309 Spirit Lk 10235 .1 -M * 1.3 -M * Steel Creek Park 10200 .7 .6 117* 1.8 1.5 120 ----- ----- Basin Index (%) 300* 180 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 1.1 -M * Bug Lake 7950 1.1 .0 * 3.0 1.4 214 Burts Miller Ranch 8000 .0 -M * .6 -M * Chalk Creek #1 8993 .6 .3 200* 2.0 1.9 105 Hayden Fork 9212 .2 .0 * 1.5 1.6 94 Kelley R.S. 8180 1.2 .0 * 3.4 1.1 309 Lily Lake 9156 .0 .0 * 1.2 1.5 80 Monte Cristo 8960 2.0 .0 * 3.3 1.7 194 Salt River Summit 7760 1.2 .0 * 3.9 1.0 390 ----- ----- Basin Index (%) 2100* 179 ----------------------------------------------------------------------------- -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.