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 TUESDAY: NOVEMBER 17 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 4.7 1.9 247 5.9 4.1 144 Blind Bull Sum 8650 4.0 3.2 125 3.7 3.8 97 Cottonwood Creek 7670 3.8 2.5 152 5.5 4.9 112 East Rim Divide 7930 1.7 1.2 142 2.6 2.5 104 Grand Targhee 9260 8.4 7.9 106 6.0 8.6 70 Granite Creek 6770 2.8 1.4 200* 5.3 3.6 147 Grassy Lake 7265 5.0 3.8 132 7.5 6.6 114 Gros Ventre Summit 8750 -M 2.8 * -M 3.1 * Gunsight Pass 9820 3.0 2.5 120 3.3 3.3 100 Lewis Lake Divide 7850 5.0 4.0 125 7.7 6.6 117 Loomis Park 8240 2.5 2.0 125 4.1 3.4 121 Phillips Bench 8200 5.4 3.3 164 7.0 4.9 143 Salt River Summit 7640 2.0 1.0 200* 3.4 3.0 113 Snake River Station 6920 2.7 1.3 208* 5.9 4.5 131 Somsen Ranch 6800 2.3 .8 288* 3.7 3.4 109 Spring Creek Divide 9000 4.2 3.2 131 5.1 4.5 113 Thumb Divide 7980 3.1 1.9 163 4.4 3.8 116 Togwotee Pass 9580 6.4 4.8 133 7.6 5.2 146 Triple Peak 8500 4.8 3.0 160 5.7 4.7 121 Two Ocean Plateau 9240 7.2 5.8 124 4.4 5.7 77 Willow Creek 8080 3.5 3.4 103 5.3 6.6 80 Younts Peak 8350 3.5 2.9 121 6.7 3.8 176 ----- ----- Basin Index (%) 139 114 MADISON HEADWATERS IN WYOMING Black Bear 8170 5.3 6.1 87 6.8 7.2 94 Canyon 7870 2.0 1.8 111 3.3 3.5 94 Madison Plateau 7750 3.3 3.1 106 5.0 5.0 100 West Yellowstone 6700 1.8 1.0 180* 3.6 3.1 116 Whiskey Creek 6800 2.3 1.7 135 4.4 4.0 110 ----- ----- Basin Index (%) 107 101 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 8.5 4.5 189 8.5 3.9 218 Canyon 7870 2.0 1.8 111 3.3 3.5 94 Evening Star 9200 8.5 4.7 181 9.9 5.9 168 Fisher Creek 9100 10.8 5.7 189 13.6 6.5 209 Monument Peak 8850 7.0 3.8 184 9.0 4.7 191 Northeast Entrance 7350 1.3 .8 162* 6.8 3.0 227 Parker Peak 9400 6.3 4.4 143 7.1 4.2 169 Sylvan Lake 8420 3.4 3.4 100 6.3 5.2 121 Thumb Divide 7980 3.1 1.9 163 4.4 3.8 116 Two Ocean Plateau 9240 7.2 5.8 124 4.4 5.7 77 White Mill 8700 10.1 4.2 240 10.6 5.1 208 Wolverine 7650 1.4 1.0 140 7.6 3.0 253 Younts Peak 8350 3.5 2.9 121 6.7 3.8 176 ----- ----- Basin Index (%) 163 168 WIND RIVER Burroughs Creek 8750 2.8 -M * 6.2 -M * Castle Creek 8400 2.0 -M * 3.4 -M * Cold Springs 9630 1.3 1.8 72 2.5 2.9 86 Deer Park 9700 3.1 3.2 97 4.3 4.6 93 Grave Springs 8550 -M 1.4 * 1.4 3.1 45 Hobbs Park 10100 1.6 3.4 47 2.2 3.5 63 Kirwin 9550 3.8 2.7 141 4.8 3.1 155 Little Warm 9370 2.7 2.1 129 4.2 3.2 131 South Pass 9040 2.7 2.7 100 3.4 4.0 85 St. Lawrence Alt 8620 .2 1.4 14 1.1 2.6 42 Togwotee Pass 9580 6.4 4.8 133 7.6 5.2 146 Townsend Creek 8700 1.1 1.8 61 2.3 3.3 70 ----- ----- Basin Index (%) 96 95 BIGHORN BASIN Bald Mtn. 9380 5.1 4.4 116 6.2 4.2 148 Bear Trap Meadow 8200 .7 1.0 70 2.9 2.5 116 Bone Springs Div 9350 4.3 4.1 105 3.9 4.0 98 Grave Springs 8550 -M 1.4 * 1.4 3.1 45 Kirwin 9550 3.8 2.7 141 4.8 3.1 155 Marquette 8760 1.4 -M * 2.2 -M * Middle Powder 7760 .5 1.8 28 2.1 3.6 58 Owl Creek 8975 1.2 1.3 92 1.3 1.8 72 Powder River Pass 9480 3.4 2.2 155 3.0 3.2 94 Shell Creek 9580 4.7 3.9 121 2.5 3.6 69 Timber Creek 7950 .8 1.3 62 1.4 2.8 50 ----- ----- Basin Index (%) 108 92 SHOSHONE RIVER Blackwater 9780 7.0 4.6 152 7.3 4.8 152 Evening Star 9200 8.5 4.7 181 9.9 5.9 168 Marquette 8760 1.4 -M * 2.2 -M * Sylvan Lake 8420 3.4 3.4 100 6.3 5.2 121 Sylvan Road 7120 2.0 1.4 143 -M 4.1 * Younts Peak 8350 3.5 2.9 121 6.7 3.8 176 ----- ----- Basin Index (%) 144 153 POWDER RIVER Bear Trap Meadow 8200 .7 1.0 70 2.9 2.5 116 Cloud Peak Reservoir 9860 2.8 3.0 93 4.0 3.9 103 Grave Springs 8550 -M 1.4 * 1.4 3.1 45 Hansen Sawmill 8360 1.8 1.0 180 2.6 2.6 100 Middle Powder 7760 .5 1.8 28 2.1 3.6 58 Powder River Pass 9480 3.4 2.2 155 3.0 3.2 94 Soldier Park 8720 .7 -M * 3.1 -M * ----- ----- Basin Index (%) 102 85 TONGUE RIVER Big Goose 7990 1.7 1.6 106 4.2 3.3 127 Bone Springs Div 9350 4.3 4.1 105 3.9 4.0 98 Burgess Junction 7880 2.3 2.3 100 3.9 3.4 115 Dome Lake 8880 2.8 2.8 100 5.1 3.9 131 Little Goose 8870 2.1 -M * 4.2 -M * Sucker Creek 8880 3.2 2.6 123 5.3 3.9 136 Tie Creek 6870 .0 .6 0 3.5 3.5 100 ----- ----- Basin Index (%) 102 118 BELLE FOURCHE Blind Park 6890 1.0 1.2 83 3.0 3.6 83 Cole Canyon 5910 .1 .3 33* 2.6 2.9 90 North Rapid Creek 6130 1.1 .9 122 3.0 3.2 94 ----- ----- Basin Index (%) 92 89 CHEYENNE RIVER BASIN Blind Park 6890 1.0 1.2 83 3.0 3.6 83 North Rapid Creek 6130 1.1 .9 122 3.0 3.2 94 ----- ----- Basin Index (%) 100 88 UPPER N. PLATTE Arapaho Ridge 10960 4.5 4.4 102 4.8 5.6 86 Blackhall Mtn 9820 5.3 -M * 6.2 -M * Cinnabar Park 9574 3.0 3.4 88 3.8 5.0 76 Columbine 9160 2.7 2.6 104 3.7 5.0 74 Divide Peak 8880 2.1 3.1 68 3.7 5.0 74 Joe Wright 10120 3.8 4.5 84 4.7 6.1 77 Laprele Creek 8375 .6 1.7 35 1.7 3.2 53 Med Bow 10500 6.5 -M * 6.5 -M * Never Summer 10280 4.6 4.0 115 3.3 -M * North French Creek 10130 3.6 4.7 77 3.9 5.6 70 Old Battle 10000 5.5 5.6 98 5.6 7.1 79 Rawah 9020 2.3 1.6 144 3.6 4.0 90 Sage Creek Basin 7850 1.5 1.7 88 2.0 3.6 56 Sand Lake 10050 5.4 4.9 110 5.1 5.4 94 South Brush Creek 8440 1.4 1.6 88 2.2 3.7 59 Tower 10500 4.4 8.1 54 6.1 8.2 74 Webber Springs 9250 4.5 3.1 145 4.6 5.5 84 Whiskey Park 8950 3.7 3.3 112 4.3 5.3 81 Willow Creek Pass 9540 2.5 2.5 100 2.4 3.4 71 Zirkel 9340 3.0 3.2 94 5.1 6.5 78 ----- ----- Basin Index (%) 92 76 SWEETWATER Deer Park 9700 3.1 3.2 97 4.3 4.6 93 Larsen Creek 9000 1.7 1.3 131 2.6 -M * South Pass 9040 2.7 2.7 100 3.4 4.0 85 ----- ----- Basin Index (%) 104 90 LOWER N. PLATTE Casper Mtn. 7900 .3 2.6 12 1.1 4.3 26 Laprele Creek 8375 .6 1.7 35 1.7 3.2 53 Reno Hill 8400 .6 2.5 24 1.9 4.0 48 Windy Peak 7900 .4 1.4 29 1.8 2.9 62 ----- ----- Basin Index (%) 23 45 LARAMIE RIVER Brooklyn Lake 10240 3.7 2.9 128 4.9 4.2 117 Cinnabar Park 9574 3.0 3.4 88 3.8 5.0 76 Crow Creek 8330 .1 .9 11 2.4 2.9 83 Deadman Hill 10220 3.5 3.4 103 3.9 4.1 95 Rawah 9020 2.3 1.6 144 3.6 4.0 90 Roach 9700 3.1 2.6 119 3.6 4.2 86 Windy Peak 7900 .4 1.4 29 1.8 2.9 62 ----- ----- Basin Index (%) 99 88 S. PLATTE Crow Creek 8330 .1 .9 11 2.4 2.9 83 ----- ----- Basin Index (%) 11 83 LITTLE SNAKE RIVER Battle Mountain 7440 .8 .8 100* 1.3 3.5 37 Divide Peak 8880 2.1 3.1 68 3.7 5.0 74 Elk River 8700 2.3 1.4 164* 1.3 4.2 31 Elkhead Divide 8780 2.3 -M * 3.4 -M * Little Snake River 8915 3.0 2.8 107 -M 6.9 * Old Battle 10000 5.5 5.6 98 5.6 7.1 79 Sage Creek Basin 7850 1.5 1.7 88 2.0 3.6 56 Sandstone RS 8150 1.4 1.0 140* 1.5 3.9 38 Whiskey Park 8950 3.7 3.3 112 4.3 5.3 81 ----- ----- Basin Index (%) 103 60 UPPER GREEN RIVER Big Sandy Opening 9080 2.0 2.8 71 2.2 3.0 73 Blind Bull Sum 8650 4.0 3.2 125 3.7 3.8 97 East Rim Divide 7930 1.7 1.2 142 2.6 2.5 104 Elkhart Park G.S. 9400 2.2 2.4 92 2.2 3.1 71 Gros Ventre Summit 8750 -M 2.8 * -M 3.1 * Gunsight Pass 9820 3.0 2.5 120 3.3 3.3 100 Indian Creek 9425 3.7 4.0 92 3.9 4.2 93 Kendall R.S. 7740 2.6 1.5 173 4.1 2.9 141 Larsen Creek 9000 1.7 1.3 131 2.6 -M * Loomis Park 8240 2.5 2.0 125 4.1 3.4 121 New Fork Lake 8340 1.9 1.6 119 3.0 2.6 115 Pocket Creek 9360 -M -M * 1.9 -M * Snider Basin 8060 2.1 1.6 131 3.4 2.8 121 Spring Creek Divide 9000 4.2 3.2 131 5.1 4.5 113 Triple Peak 8500 4.8 3.0 160 5.7 4.7 121 ----- ----- Basin Index (%) 120 106 LOWER GREEN RIVER Blacks Fork Jct 8869 .5 -M * 2.5 -M * Buck Pasture 9632 2.6 -M * 3.4 -M * EF Blacks Fork GS 9360 1.4 -M * 2.6 -M * Hams Fork 7840 2.3 1.1 209 2.6 2.5 104 Henrys Fork 10182 -M -M * 2.4 -M * Hewinta 9500 1.6 1.2 133 3.7 3.5 106 Hickerson Park 9122 1.1 1.3 85 2.4 3.1 77 Hole-in-Rock 9168 .7 1.0 70 2.6 2.9 90 Indian Creek 9425 3.7 4.0 92 3.9 4.2 93 Kelley R.S. 8180 2.8 1.9 147 3.7 3.5 106 Spirit Lk 10235 3.6 -M * 3.6 -M * Steel Creek Park 10158 2.5 2.9 86 3.8 4.0 95 ----- ----- Basin Index (%) 110 96 UPPER BEAR RIVER Bear River RS 8777 1.5 -M * 2.9 -M * Bug Lake 7987 3.2 2.0 160 4.0 3.9 103 Burts Miller Ranch 8000 .9 -M * 2.0 -M * Chalk Creek #1 9171 3.0 3.4 88 4.5 5.5 82 Dry Bread Pond 8302 2.8 1.6 175* 3.7 4.0 92 Giveout 6930 1.4 .5 280* 2.9 2.7 107 Hayden Fork 9130 1.9 1.8 106 4.4 4.5 98 Kelley R.S. 8180 2.8 1.9 147 3.7 3.5 106 Lily Lake 9133 2.4 1.8 133 3.0 4.1 73 Monte Cristo 8932 4.1 2.6 158* 4.5 5.0 90 Salt River Summit 7640 2.0 1.0 200* 3.4 3.0 113 Spring Creek Divide 9000 4.2 3.2 131 5.1 4.5 113 Trial Lake 9992 3.6 3.0 120 3.6 4.9 73 ----- ----- Basin Index (%) 138 94 ----------------------------------------------------------------------------- -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.