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: APRIL 18 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 22.0 12.2 180 40.1 21.6 186 Black Bear 8170 47.6 36.8 129 55.7 39.5 141 Blind Bull Sum 8650 44.0 23.9 184 -M 20.1 * Cottonwood Creek 7670 26.9 19.1 141 39.3 25.5 154 East Rim Divide 7930 12.9 9.6 134 21.3 12.1 176 Grand Targhee 9260 48.6 41.7 117 43.6 32.3 135 Granite Creek 6770 23.4 11.4 205 36.4 20.2 180 Grassy Lake 7265 37.1 31.5 118 56.4 37.1 152 Gros Ventre Summit 8750 20.2 13.2 153 24.9 13.5 184 Gunsight Pass 9820 23.6 13.5 175 25.7 14.6 176 Lewis Lake Divide 7850 46.0 30.2 152 56.8 36.5 156 Phillips Bench 8200 38.3 25.8 148 47.4 28.9 164 Salt River Summit 7760 18.4 10.3 179 29.7 17.2 173 Snake River Station 6920 15.8 11.7 135 36.5 23.3 157 Spring Creek Divide 9000 41.7 23.5 177 41.2 24.6 167 Thumb Divide 7980 21.3 14.5 147 28.8 19.5 148 Togwotee Pass 9580 33.8 23.5 144 39.5 25.4 156 Two Ocean Plateau 9240 -M 27.8 * -M 28.2 * Willow Creek 8380 27.7 26.8 103 51.5 34.9 148 Younts Peak 8350 25.5 15.0 170 31.8 16.4 194 ----- ----- Basin Index (%) 146 159 MADISON-GALLATIN Black Bear 8170 47.6 36.8 129 55.7 39.5 141 Canyon 7870 17.7 12.4 143 26.4 16.8 157 Madison Plateau 7750 28.0 22.8 123 37.4 27.2 138 West Yellowstone 6700 3.8 8.0 48 23.9 14.9 160 Whiskey Creek 6800 13.2 15.1 87 27.8 21.0 132 ----- ----- Basin Index (%) 116 143 YELLOWSTONE Beartooth Lake 9360 33.5 23.0 146 28.8 20.5 140 Burnt Mtn 5880 .2 .0 * 15.0 13.9 108 Canyon 7870 17.7 12.4 143 26.4 16.8 157 Cole Creek 7850 12.0 16.0 75 9.5 14.2 67 Evening Star 9200 38.9 25.0 156 45.8 28.4 161 Fisher Creek 9100 44.4 32.2 138 48.6 33.0 147 Northeast Entrance 7350 4.8 7.3 66 21.0 12.8 164 Parker Peak 9400 37.2 20.8 179 35.5 18.5 192 Sylvan Lake 8420 24.4 20.3 120 38.3 23.3 164 Thumb Divide 7980 21.3 14.5 147 28.8 19.5 148 Two Ocean Plateau 9240 -M 27.8 * -M 28.2 * White Mill 8700 37.5 23.6 159 37.0 24.7 150 Wolverine 7650 3.6 7.8 46 21.4 12.7 169 ----- ----- Basin Index (%) 136 149 WIND RIVER Burroughs Creek 8750 21.3 -M * 28.1 -M * Castle Creek 8400 8.8 -M * 15.9 -M * Cold Springs 9630 16.0 5.1 314 20.4 10.7 191 Deer Park 9700 32.5 16.1 202 38.6 21.1 183 Hobbs Park 10100 29.7 14.8 201 29.1 14.5 201 Kirwin 9550 22.5 10.0 225 26.0 12.2 213 Little Warm 9370 18.7 10.2 183 25.5 13.7 186 Owl Creek 8975 8.9 4.4 202 13.4 6.6 203 South Pass 9040 31.4 15.7 200 29.2 18.3 160 St. Lawrence Alt 8620 8.3 5.7 146 17.6 9.7 181 Togwotee Pass 9580 33.8 23.5 144 39.5 25.4 156 Townsend Creek 8700 17.5 9.7 180 23.7 13.0 182 ----- ----- Basin Index (%) 190 181 BIGHORN BASIN Bald Mtn. 9380 20.8 19.6 106 18.1 17.9 101 Bear Trap Meadow 8200 3.7 3.8 97 9.7 9.2 105 Bone Springs Div 9350 20.8 16.3 128 18.9 16.5 115 Grave Springs 8550 6.8 9.7 70 8.7 11.3 77 Kirwin 9550 22.5 10.0 225 26.0 12.2 213 Marquette 8760 14.2 -M * 18.1 -M * Middle Powder 7760 8.4 12.5 67 8.6 12.5 69 Owl Creek 8975 8.9 4.4 202 13.4 6.6 203 Powder River Pass 9480 9.1 10.1 90 14.5 13.5 107 Shell Creek 9580 18.5 15.3 121 16.0 14.6 110 Timber Creek 7950 7.0 5.1 137 12.0 8.2 146 ----- ----- Basin Index (%) 118 119 SHOSHONE RIVER Blackwater 9780 38.9 23.8 163 43.2 21.6 200 Evening Star 9200 38.9 25.0 156 45.8 28.4 161 Marquette 8760 14.2 -M * 18.1 -M * Sylvan Road 7120 1.7 10.2 17 31.2 17.4 179 Younts Peak 8350 25.5 15.0 170 31.8 16.4 194 ----- ----- Basin Index (%) 142 181 POWDER RIVER Bear Trap Meadow 8200 3.7 3.8 97 9.7 9.2 105 Cloud Peak Reservoir 9860 16.5 15.6 106 20.4 14.5 141 Grave Springs 8550 6.8 9.7 70 8.7 11.3 77 Hansen Sawmill 8360 11.1 5.2 213 15.7 9.3 169 Middle Powder 7760 8.4 12.5 67 8.6 12.5 69 Powder River Pass 9480 9.1 10.1 90 14.5 13.5 107 Soldier Park 8720 14.5 -M * 15.7 -M * ----- ----- Basin Index (%) 98 110 TONGUE RIVER Big Goose 7990 11.9 9.5 125 15.3 12.3 124 Bone Springs Div 9350 20.8 16.3 128 18.9 16.5 115 Burgess Junction 7880 10.9 12.3 89 12.9 13.2 98 Dome Lake 8880 16.6 11.9 139 17.7 14.6 121 Little Goose 8870 14.3 -M * 18.8 -M * Sucker Creek 8880 13.3 12.7 105 15.1 15.5 97 Tie Creek 6870 .4 4.5 9 14.5 12.6 115 ----- ----- Basin Index (%) 110 111 BELLE FOURCHE Cole Canyon 5910 .0 2.4 0 7.9 10.1 78 ----- ----- Basin Index (%) 0 78 CHEYENNE RIVER BASIN Blind Park 6890 .0 4.4 0 9.7 12.6 77 North Rapid Creek 6130 .0 4.6 0 8.2 10.5 78 ----- ----- Basin Index (%) 0 77 UPPER N. PLATTE Arapaho Ridge 10960 24.0 21.4 112 26.4 24.0 110 Blackhall Mtn 9820 34.5 -M * 38.2 -M * Columbine 9160 12.3 21.0 59 27.8 26.6 105 Divide Peak 8880 11.8 19.3 61 23.3 22.5 104 Joe Wright 10120 15.9 22.1 72 28.8 27.4 105 Laprele Creek 8375 6.8 8.6 79 12.8 13.4 96 Med Bow 10500 34.9 -M * 35.7 -M * North French Creek 10130 23.5 32.0 73 27.9 28.1 99 Never Summer 10280 21.9 20.6 106 19.6 -M * Old Battle 10000 36.4 32.4 112 38.9 36.6 106 Rawah 9020 4.8 8.9 54 17.4 15.5 112 Sage Creek Basin 7850 -M 7.1 * 16.8 15.1 111 Sand Lake 10050 30.2 30.4 99 28.1 26.4 106 South Brush Creek 8440 -M 10.1 * 13.1 16.2 81 Tower 10500 37.5 47.7 79 44.2 41.6 106 Webber Springs 9250 23.3 22.6 103 33.8 28.1 120 Willow Creek Pass 9540 17.9 12.8 140 18.6 14.2 131 Zirkel 9340 -M 23.0 * 42.4 29.5 144 ----- ----- Basin Index (%) 89 110 SWEETWATER Deer Park 9700 32.5 16.1 202 38.6 21.1 183 Larsen Creek 9000 12.9 10.5 123 23.6 -M * South Pass 9040 31.4 15.7 200 29.2 18.3 160 ----- ----- Basin Index (%) 182 172 LOWER N. PLATTE Casper Mtn. 7900 9.9 14.5 68 13.6 16.2 84 Laprele Creek 8375 6.8 8.6 79 12.8 13.4 96 Reno Hill 8400 11.8 14.0 84 15.3 16.8 91 Windy Peak 7900 4.7 6.9 68 12.0 11.4 105 ----- ----- Basin Index (%) 75 93 LARAMIE RIVER Brooklyn Lake 10240 20.6 22.1 93 23.6 22.4 105 Cinnabar Park 9574 13.3 20.5 65 22.6 25.2 90 Crow Creek 8330 .0 1.7 0 9.3 11.9 78 Deadman Hill 10220 20.3 16.6 122 20.9 18.6 112 Rawah 9020 4.8 8.9 54 17.4 15.5 112 Roach 9700 14.8 16.5 90 21.6 20.3 106 ----- ----- Basin Index (%) 86 101 S. PLATTE Black Mountain 8920 8.5 -M * 13.3 -M * Crow Creek 8330 .0 1.7 0 9.3 11.9 78 Deadman Hill 10220 20.3 16.6 122 20.9 18.6 112 ----- ----- Basin Index (%) 111 99 LITTLE SNAKE RIVER Battle Mountain 7440 .0 5.4 0 17.1 15.8 108 Divide Peak 8880 11.8 19.3 61 23.3 22.5 104 Elk River 8700 6.6 16.1 41 20.4 21.0 97 Little Snake River 8915 21.9 25.0 88 39.2 31.0 126 Old Battle 10000 36.4 32.4 112 38.9 36.6 106 Sage Creek Basin 7850 -M 7.1 * 16.8 15.1 111 Sandstone RS 8150 -M 10.8 * 16.2 19.2 84 Whiskey Park 8950 21.8 26.2 83 30.6 29.3 104 ----- ----- Basin Index (%) 79 106 UPPER GREEN RIVER Big Sandy Opening 9080 20.8 12.7 164 23.6 13.9 170 Blind Bull Sum 8650 44.0 23.9 184 -M 20.1 * East Rim Divide 7930 12.9 9.6 134 21.3 12.1 176 Elkhart Park G.S. 9400 19.6 12.0 163 24.8 13.9 178 Gros Ventre Summit 8750 20.2 13.2 153 24.9 13.5 184 Gunsight Pass 9820 23.6 13.5 175 25.7 14.6 176 Kendall R.S. 7740 16.7 9.0 186 29.5 14.6 202 Loomis Park 8240 25.2 13.2 191 32.7 17.8 184 New Fork Lake 8340 13.3 9.2 145 18.5 11.2 165 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 16.5 11.1 149 28.0 14.6 192 Spring Creek Divide 9000 41.7 23.5 177 41.2 24.6 167 Triple Peak 8500 35.2 19.3 182 41.7 26.1 160 ----- ----- Basin Index (%) 170 176 LOWER GREEN RIVER Blacks Fork Jct 8869 5.6 -M * 16.5 -M * Buck Pasture 9632 15.6 -M * 24.2 -M * EF Blacks Fork GS 9360 12.1 -M * 17.9 -M * Hams Fork 7840 11.0 7.5 147 22.0 11.9 185 Hewinta 9500 6.7 8.7 77 17.9 14.8 121 Hickerson Park 9122 6.4 5.8 110 13.5 10.9 124 Hole-in-Rock 9168 5.6 6.2 90 14.0 10.4 135 Indian Creek 9425 40.3 23.3 173 41.8 23.3 179 Kelley R.S. 8180 24.1 13.1 184 31.2 18.7 167 Spirit Lk 10235 15.5 -M * 19.2 -M * Steel Creek Park 10158 19.2 16.1 119 21.7 17.5 124 ----- ----- Basin Index (%) 140 151 UPPER BEAR RIVER Bear River RS 8777 3.4 -M * 19.1 -M * Bug Lake 7987 31.7 18.0 176 34.8 20.1 173 Burts Miller Ranch 8000 .0 -M * 10.6 -M * Chalk Creek #1 9171 32.0 24.8 129 37.1 26.4 141 Hayden Fork 9130 14.9 12.6 118 30.4 22.1 138 Kelley R.S. 8180 24.1 13.1 184 31.2 18.7 167 Lily Lake 9133 11.4 11.3 101 20.5 18.1 113 Monte Cristo 8932 36.0 27.6 130 40.5 27.0 150 Salt River Summit 7760 18.4 10.3 179 29.7 17.2 173 ----- ----- Basin Index (%) 143 150 ----------------------------------------------------------------------------- -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.