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: NOVEMBER 22 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 6.1 2.4 254 7.6 4.8 158 Black Bear 8170 11.7 7.2 162 10.7 8.4 127 Blind Bull Sum 8650 10.3 3.9 264 6.7 4.4 152 Cottonwood Creek 7670 4.3 3.0 143 5.7 5.5 104 East Rim Divide 7930 3.1 1.5 207 3.7 2.8 132 Grand Targhee 9260 17.2 9.0 191 10.3 8.9 116 Granite Creek 6770 -M 1.6 * -M 4.2 * Grassy Lake 7265 7.2 4.7 153 9.4 7.7 122 Gros Ventre Summit 8750 6.3 3.0 210 5.8 3.4 171 Gunsight Pass 9820 5.0 2.6 192 5.7 3.5 163 Lewis Lake Divide 7850 9.5 5.2 183 11.0 7.8 141 Phillips Bench 8200 7.4 3.9 190 8.2 5.7 144 Salt River Summit 7760 2.2 1.3 169 3.7 3.5 106 Snake River Station 6920 4.6 1.9 242 7.2 5.2 138 Spring Creek Divide 9000 6.6 3.9 169 7.0 5.1 137 Thumb Divide 7980 5.7 2.3 248 6.8 4.4 155 Togwotee Pass 9580 10.8 5.5 196 10.3 5.8 178 Two Ocean Plateau 9240 15.2 7.0 217 10.0 6.5 154 Willow Creek 8380 7.1 4.0 178 9.6 7.5 128 Younts Peak 8350 -M 3.3 * -M 4.2 * ----- ----- Basin Index (%) 194 138 MADISON-GALLATIN Black Bear 8170 11.7 7.2 162 10.7 8.4 127 Canyon 7870 3.7 2.2 168 4.8 4.0 120 Madison Plateau 7750 7.0 3.8 184 7.3 5.7 128 West Yellowstone 6700 2.8 1.4 200 4.4 3.4 129 Whiskey Creek 6800 3.0 2.2 136 4.7 4.6 102 ----- ----- Basin Index (%) 168 122 YELLOWSTONE Beartooth Lake 9360 11.8 5.2 227 10.0 4.5 222 Burnt Mtn 5880 2.5 .8 312 5.2 4.6 113 Canyon 7870 3.7 2.2 168 4.8 4.0 120 Cole Creek 7850 4.7 3.4 138 3.5 4.4 80 Evening Star 9200 12.8 5.8 221 12.5 6.8 184 Fisher Creek 9100 15.3 7.0 219 12.8 7.4 173 Northeast Entrance 7350 2.9 1.1 264 5.0 3.4 147 Parker Peak 9400 11.6 4.9 237 9.0 4.7 191 Sylvan Lake 8420 8.3 4.1 202 8.5 5.9 144 Thumb Divide 7980 5.7 2.3 248 6.8 4.4 155 Two Ocean Plateau 9240 15.2 7.0 217 10.0 6.5 154 White Mill 8700 12.6 4.8 262 7.9 5.8 136 Wolverine 7650 4.3 1.2 358 6.1 3.4 179 ----- ----- Basin Index (%) 224 155 WIND RIVER Burroughs Creek 8750 5.0 -M * 5.5 -M * Castle Creek 8400 2.3 -M * 3.7 -M * Cold Springs 9630 2.8 1.8 156 3.6 3.1 116 Deer Park 9700 5.2 3.4 153 5.9 4.8 123 Hobbs Park 10100 7.5 3.8 197 6.2 3.8 163 Kirwin 9550 7.4 3.0 247 5.9 3.4 174 Little Warm 9370 6.9 2.3 300 6.2 3.5 177 Owl Creek 8975 1.3 1.4 93 2.8 2.0 140 South Pass 9040 4.2 3.1 135 3.6 4.4 82 St. Lawrence Alt 8620 1.8 1.6 112 3.7 2.8 132 Togwotee Pass 9580 10.8 5.5 196 10.3 5.8 178 Townsend Creek 8700 2.8 2.0 140 4.1 3.6 114 ----- ----- Basin Index (%) 182 141 BIGHORN BASIN Bald Mtn. 9380 6.0 4.8 125 3.9 4.5 87 Bear Trap Meadow 8200 2.2 1.2 183 3.3 2.8 118 Bone Springs Div 9350 4.1 4.5 91 3.8 4.3 88 Grave Springs 8550 1.6 1.5 107 1.9 3.3 58 Kirwin 9550 7.4 3.0 247 5.9 3.4 174 Marquette 8760 2.1 -M * 4.6 -M * Middle Powder 7760 2.1 2.1 100 1.9 3.9 49 Owl Creek 8975 1.3 1.4 93 2.8 2.0 140 Powder River Pass 9480 5.2 2.3 226 4.6 3.5 131 Shell Creek 9580 7.4 4.2 176 4.5 3.9 115 Timber Creek 7950 1.4 1.4 100 1.1 2.9 38 ----- ----- Basin Index (%) 147 98 SHOSHONE RIVER Blackwater 9780 13.3 5.6 238 10.5 5.4 194 Evening Star 9200 12.8 5.8 221 12.5 6.8 184 Marquette 8760 2.1 -M * 4.6 -M * Sylvan Road 7120 4.3 1.8 239 6.7 4.7 143 Younts Peak 8350 -M 3.3 * -M 4.2 * ----- ----- Basin Index (%) 230 176 POWDER RIVER Bear Trap Meadow 8200 2.2 1.2 183 3.3 2.8 118 Cloud Peak Reservoir 9860 3.4 3.4 100 4.6 4.2 110 Grave Springs 8550 1.6 1.5 107 1.9 3.3 58 Hansen Sawmill 8360 2.4 1.3 185 3.3 2.7 122 Middle Powder 7760 2.1 2.1 100 1.9 3.9 49 Powder River Pass 9480 5.2 2.3 226 4.6 3.5 131 Soldier Park 8720 1.5 -M * 3.5 -M * ----- ----- Basin Index (%) 143 96 TONGUE RIVER Big Goose 7990 1.5 2.0 75 2.2 3.5 63 Bone Springs Div 9350 4.1 4.5 91 3.8 4.3 88 Burgess Junction 7880 1.7 2.6 65 2.4 3.7 65 Dome Lake 8880 2.8 3.1 90 3.0 4.2 71 Little Goose 8870 1.8 -M * 3.5 -M * Sucker Creek 8880 2.0 2.9 69 1.3 4.2 31 Tie Creek 6870 1.2 .6 200 2.5 3.7 68 ----- ----- Basin Index (%) 85 64 BELLE FOURCHE Cole Canyon 5910 .8 .6 133 2.0 3.1 65 ----- ----- Basin Index (%) 133 65 CHEYENNE RIVER BASIN Blind Park 6890 1.2 1.4 86 3.1 3.9 79 North Rapid Creek 6130 1.5 1.1 136 2.1 3.4 62 ----- ----- Basin Index (%) 108 71 UPPER N. PLATTE Arapaho Ridge 10960 5.2 4.9 106 5.7 5.9 97 Blackhall Mtn 9820 6.6 -M * 7.1 -M * Columbine 9160 3.4 3.5 97 7.1 5.5 129 Divide Peak 8880 3.0 3.6 83 5.9 5.6 105 Joe Wright 10120 4.2 4.9 86 9.3 6.7 139 Laprele Creek 8375 1.3 2.0 65 2.7 3.5 77 Med Bow 10500 9.3 -M * 8.2 -M * North French Creek 10130 6.6 5.1 129 7.3 6.3 116 Never Summer 10280 5.8 4.3 135 5.8 -M * Old Battle 10000 6.1 6.1 100 6.1 8.1 75 Rawah 9020 2.7 1.9 142 5.9 4.2 140 Sage Creek Basin 7850 1.7 1.7 100 3.3 3.7 89 Sand Lake 10050 7.7 5.7 135 6.8 6.0 113 South Brush Creek 8440 3.1 2.0 155 4.4 4.0 110 Tower 10500 7.0 9.2 76 9.5 9.2 103 Webber Springs 9250 3.6 3.8 95 5.8 6.2 94 Willow Creek Pass 9540 4.7 2.9 162 5.0 3.7 135 Zirkel 9340 4.1 3.5 117 8.5 7.0 121 ----- ----- Basin Index (%) 108 109 SWEETWATER Deer Park 9700 5.2 3.4 153 5.9 4.8 123 Larsen Creek 9000 2.0 1.8 111 3.5 -M * South Pass 9040 4.2 3.1 135 3.6 4.4 82 ----- ----- Basin Index (%) 137 103 LOWER N. PLATTE Casper Mtn. 7900 1.9 3.0 63 2.1 4.6 46 Laprele Creek 8375 1.3 2.0 65 2.7 3.5 77 Reno Hill 8400 2.6 2.7 96 3.7 4.2 88 Windy Peak 7900 1.3 1.4 93 2.7 3.0 90 ----- ----- Basin Index (%) 78 73 LARAMIE RIVER Brooklyn Lake 10240 4.3 3.8 113 5.6 4.8 117 Cinnabar Park 9574 6.0 4.0 150 7.8 5.4 144 Crow Creek 8330 .8 1.3 62 4.0 3.1 129 Deadman Hill 10220 6.7 3.9 172 7.0 4.5 156 Rawah 9020 2.7 1.9 142 5.9 4.2 140 Roach 9700 4.5 3.2 141 6.4 4.7 136 ----- ----- Basin Index (%) 138 137 S. PLATTE Black Mountain 8920 3.1 -M * 5.2 -M * Crow Creek 8330 .8 1.3 62 4.0 3.1 129 Deadman Hill 10220 6.7 3.9 172 7.0 4.5 156 ----- ----- Basin Index (%) 144 145 LITTLE SNAKE RIVER Battle Mountain 7440 .6 1.0 60* 3.2 3.8 84 Divide Peak 8880 3.0 3.6 83 5.9 5.6 105 Elk River 8700 2.7 2.1 129 5.1 4.6 111 Little Snake River 8915 3.4 3.0 113 6.9 7.1 97 Old Battle 10000 6.1 6.1 100 6.1 8.1 75 Sage Creek Basin 7850 1.7 1.7 100 3.3 3.7 89 Sandstone RS 8150 1.4 1.3 108* 2.9 4.4 66 Whiskey Park 8950 3.3 3.8 87 6.1 6.0 102 ----- ----- Basin Index (%) 98 91 UPPER GREEN RIVER Big Sandy Opening 9080 3.4 3.1 110 3.9 3.4 115 Blind Bull Sum 8650 10.3 3.9 264 6.7 4.4 152 East Rim Divide 7930 3.1 1.5 207 3.7 2.8 132 Elkhart Park G.S. 9400 3.3 2.6 127 3.5 3.5 100 Gros Ventre Summit 8750 6.3 3.0 210 5.8 3.4 171 Gunsight Pass 9820 5.0 2.6 192 5.7 3.5 163 Kendall R.S. 7740 3.9 1.9 205 4.8 3.3 145 Loomis Park 8240 4.7 2.2 214 5.2 3.8 137 New Fork Lake 8340 2.8 1.8 156 2.3 2.8 82 Pocket Creek 9360 4.0 -M * 3.6 -M * Snider Basin 8060 3.0 1.9 158 4.2 3.1 135 Spring Creek Divide 9000 6.6 3.9 169 7.0 5.1 137 Triple Peak 8500 7.1 3.9 182 9.0 5.3 170 ----- ----- Basin Index (%) 184 139 LOWER GREEN RIVER Blacks Fork Jct 8869 1.7 -M * 2.4 -M * Buck Pasture 9632 2.9 -M * 3.4 -M * EF Blacks Fork GS 9360 1.9 -M * 2.7 -M * Hams Fork 7840 1.7 1.6 106 2.8 2.7 104 Hewinta 9500 .9 1.4 64 2.9 3.8 76 Hickerson Park 9122 1.9 1.3 146 1.7 3.3 52 Hole-in-Rock 9168 1.6 1.2 133 2.1 3.2 66 Indian Creek 9425 5.6 4.7 119 4.8 4.7 102 Kelley R.S. 8180 3.3 2.3 143 3.8 4.0 95 Spirit Lk 10235 2.1 -M * 2.3 -M * Steel Creek Park 10158 3.7 3.2 116 3.6 4.4 82 ----- ----- Basin Index (%) 119 83 UPPER BEAR RIVER Bear River RS 8777 1.6 -M * 2.8 -M * Bug Lake 7987 3.4 2.6 131 5.1 4.4 116 Burts Miller Ranch 8000 1.5 -M * 1.7 -M * Chalk Creek #1 9171 3.7 3.9 95 4.4 6.1 72 Hayden Fork 9130 2.5 2.3 109 3.7 5.0 74 Kelley R.S. 8180 3.3 2.3 143 3.8 4.0 95 Lily Lake 9133 1.9 2.2 86 2.8 4.5 62 Monte Cristo 8932 5.3 3.6 147 5.4 5.7 95 Salt River Summit 7760 2.2 1.3 169 3.7 3.5 106 ----- ----- Basin Index (%) 123 87 ----------------------------------------------------------------------------- -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.