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: MARCH 23 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 24.2 14.6 166 37.8 19.2 197 Black Bear 8170 44.0 33.1 133 49.9 34.9 143 Blind Bull Sum 8650 41.4 20.8 199 -M 17.9 * Cottonwood Creek 7670 25.6 20.3 126 35.3 22.3 158 East Rim Divide 7930 17.2 9.6 179 20.0 10.7 187 Grand Targhee 9260 41.7 33.4 125 38.0 27.4 139 Granite Creek 6770 28.4 14.7 193 34.6 18.3 189 Grassy Lake 7265 34.4 29.7 116 51.0 33.1 154 Gros Ventre Summit 8750 17.4 11.8 147 22.1 11.6 191 Gunsight Pass 9820 19.9 12.3 162 22.4 12.2 184 Lewis Lake Divide 7850 40.3 28.2 143 52.0 32.5 160 Phillips Bench 8200 34.6 22.8 152 44.4 25.6 173 Salt River Summit 7760 19.7 12.2 161 -M 15.2 * Snake River Station 6920 19.1 15.5 123 33.7 20.6 164 Spring Creek Divide 9000 37.7 21.6 175 37.7 21.8 173 Thumb Divide 7980 22.6 14.4 157 26.6 16.7 159 Togwotee Pass 9580 31.2 20.9 149 35.8 22.0 163 Two Ocean Plateau 9240 -M 24.4 * -M 24.8 * Willow Creek 8380 29.0 25.3 115 45.9 30.4 151 Younts Peak 8350 24.9 13.6 183 30.0 14.3 210 ----- ----- Basin Index (%) 148 165 MADISON-GALLATIN Black Bear 8170 44.0 33.1 133 49.9 34.9 143 Canyon 7870 16.8 11.8 142 24.4 14.7 166 Madison Plateau 7750 25.3 20.4 124 33.8 23.9 141 West Yellowstone 6700 9.9 10.0 99 21.8 12.8 170 Whiskey Creek 6800 13.4 14.4 93 25.1 18.3 137 ----- ----- Basin Index (%) 122 148 YELLOWSTONE Beartooth Lake 9360 30.8 19.8 156 26.3 18.0 146 Burnt Mtn 5880 2.5 4.7 53 12.5 11.0 114 Canyon 7870 16.8 11.8 142 24.4 14.7 166 Cole Creek 7850 9.5 12.3 77 6.8 11.0 62 Evening Star 9200 36.7 22.7 162 42.8 24.8 173 Fisher Creek 9100 41.6 28.4 146 44.5 28.9 154 Northeast Entrance 7350 9.9 9.3 106 19.3 11.1 174 Parker Peak 9400 31.7 17.9 177 32.3 15.9 203 Sylvan Lake 8420 21.5 18.4 117 35.3 20.2 175 Thumb Divide 7980 22.6 14.4 157 26.6 16.7 159 Two Ocean Plateau 9240 -M 24.4 * -M 24.8 * White Mill 8700 33.2 20.4 163 33.9 21.5 158 Wolverine 7650 10.1 8.9 113 20.1 11.1 181 ----- ----- Basin Index (%) 141 159 WIND RIVER Burroughs Creek 8750 22.8 -M * 25.7 -M * Castle Creek 8400 11.1 -M * 14.5 -M * Cold Springs 9630 11.9 6.6 180 14.9 8.7 171 Deer Park 9700 27.7 13.9 199 32.7 17.4 188 Hobbs Park 10100 22.1 12.2 181 20.5 11.3 181 Kirwin 9550 19.1 8.5 225 21.5 10.2 211 Little Warm 9370 15.7 9.4 167 21.5 11.3 190 Owl Creek 8975 6.7 4.7 143 9.1 5.1 178 South Pass 9040 26.0 14.3 182 23.9 15.5 154 St. Lawrence Alt 8620 5.0 6.4 78 12.1 7.7 157 Togwotee Pass 9580 31.2 20.9 149 35.8 22.0 163 Townsend Creek 8700 11.9 8.5 140 16.0 10.2 157 ----- ----- Basin Index (%) 168 174 BIGHORN BASIN Bald Mtn. 9380 17.2 16.6 104 14.9 15.1 99 Bear Trap Meadow 8200 3.8 5.2 73 6.2 7.3 85 Bone Springs Div 9350 15.9 14.2 112 15.3 13.6 112 Grave Springs 8550 5.7 8.3 69 6.0 9.2 65 Kirwin 9550 19.1 8.5 225 21.5 10.2 211 Marquette 8760 7.0 -M * 11.7 -M * Middle Powder 7760 5.8 10.2 57 6.2 10.3 60 Owl Creek 8975 6.7 4.7 143 9.1 5.1 178 Powder River Pass 9480 6.8 9.4 72 10.6 11.1 95 Shell Creek 9580 14.9 13.1 114 12.0 12.1 99 Timber Creek 7950 4.0 4.1 98 7.1 6.3 113 ----- ----- Basin Index (%) 106 109 SHOSHONE RIVER Blackwater 9780 35.8 21.0 170 39.7 18.4 216 Evening Star 9200 36.7 22.7 162 42.8 24.8 173 Marquette 8760 7.0 -M * 11.7 -M * Sylvan Road 7120 12.2 10.6 115 29.7 15.3 194 Younts Peak 8350 24.9 13.6 183 30.0 14.3 210 ----- ----- Basin Index (%) 161 195 POWDER RIVER Bear Trap Meadow 8200 3.8 5.2 73 6.2 7.3 85 Cloud Peak Reservoir 9860 11.9 13.2 90 13.2 11.5 115 Grave Springs 8550 5.7 8.3 69 6.0 9.2 65 Hansen Sawmill 8360 7.2 5.8 124 9.7 7.4 131 Middle Powder 7760 5.8 10.2 57 6.2 10.3 60 Powder River Pass 9480 6.8 9.4 72 10.6 11.1 95 Soldier Park 8720 10.9 -M * 9.5 -M * ----- ----- Basin Index (%) 79 91 TONGUE RIVER Big Goose 7990 8.1 8.0 101 9.6 9.4 102 Bone Springs Div 9350 15.9 14.2 112 15.3 13.6 112 Burgess Junction 7880 8.1 9.8 83 9.1 10.7 85 Dome Lake 8880 12.4 10.5 118 12.4 11.7 106 Little Goose 8870 8.8 -M * 12.0 -M * Sucker Creek 8880 9.6 11.0 87 9.9 12.5 79 Tie Creek 6870 2.2 5.1 43 10.0 9.9 101 ----- ----- Basin Index (%) 96 98 BELLE FOURCHE Cole Canyon 5910 1.1 5.6 20 6.6 8.0 82 ----- ----- Basin Index (%) 20 82 CHEYENNE RIVER BASIN Blind Park 6890 1.8 7.1 25 7.9 10.6 75 North Rapid Creek 6130 3.0 6.6 45 6.7 8.7 77 ----- ----- Basin Index (%) 35 76 UPPER N. PLATTE Arapaho Ridge 10960 22.6 18.2 124 23.6 19.9 119 Blackhall Mtn 9820 34.2 -M * 35.2 -M * Columbine 9160 21.0 22.1 95 26.0 23.3 112 Divide Peak 8880 15.7 18.0 87 20.9 19.4 108 Joe Wright 10120 16.6 19.3 86 25.7 23.2 111 Laprele Creek 8375 10.2 9.3 110 10.7 11.0 97 Med Bow 10500 37.2 -M * 32.5 -M * North French Creek 10130 23.3 26.1 89 25.2 24.0 105 Never Summer 10280 20.9 18.2 115 17.2 -M * Old Battle 10000 35.4 27.1 131 36.4 31.9 114 Rawah 9020 9.1 9.7 94 15.1 12.4 122 Sage Creek Basin 7850 9.2 11.6 79 15.2 13.0 117 Sand Lake 10050 28.4 25.3 112 25.5 22.0 116 South Brush Creek 8440 6.8 11.3 60 11.7 13.6 86 Tower 10500 39.2 40.7 96 41.7 36.2 115 Webber Springs 9250 25.4 21.5 118 31.6 24.2 131 Willow Creek Pass 9540 16.3 11.1 147 17.1 11.9 144 Zirkel 9340 35.5 25.5 139 40.3 25.6 157 ----- ----- Basin Index (%) 107 118 SWEETWATER Deer Park 9700 27.7 13.9 199 32.7 17.4 188 Larsen Creek 9000 16.4 11.4 144 21.5 -M * South Pass 9040 26.0 14.3 182 23.9 15.5 154 ----- ----- Basin Index (%) 177 172 LOWER N. PLATTE Casper Mtn. 7900 9.3 12.6 74 10.4 13.0 80 Laprele Creek 8375 10.2 9.3 110 10.7 11.0 97 Reno Hill 8400 10.4 12.3 85 11.9 13.2 90 Windy Peak 7900 8.1 7.4 109 10.2 9.2 111 ----- ----- Basin Index (%) 91 93 LARAMIE RIVER Brooklyn Lake 10240 23.7 18.0 132 21.8 18.8 116 Cinnabar Park 9574 16.9 18.7 90 20.8 21.6 96 Crow Creek 8330 1.8 6.9 26 8.1 9.1 89 Deadman Hill 10220 19.5 14.2 137 18.2 15.2 120 Rawah 9020 9.1 9.7 94 15.1 12.4 122 Roach 9700 14.9 14.3 104 18.4 17.1 108 ----- ----- Basin Index (%) 105 109 S. PLATTE Black Mountain 8920 9.1 -M * 10.6 -M * Crow Creek 8330 1.8 6.9 26 8.1 9.1 89 Deadman Hill 10220 19.5 14.2 137 18.2 15.2 120 ----- ----- Basin Index (%) 101 108 LITTLE SNAKE RIVER Battle Mountain 7440 4.7 11.3 42 15.6 13.7 114 Divide Peak 8880 15.7 18.0 87 20.9 19.4 108 Elk River 8700 14.3 17.5 82 19.1 18.2 105 Little Snake River 8915 26.7 21.4 125 36.8 26.8 137 Old Battle 10000 35.4 27.1 131 36.4 31.9 114 Sage Creek Basin 7850 9.2 11.6 79 15.2 13.0 117 Sandstone RS 8150 9.7 12.7 76 15.2 16.9 90 Whiskey Park 8950 25.2 24.5 103 28.3 25.3 112 ----- ----- Basin Index (%) 98 113 UPPER GREEN RIVER Big Sandy Opening 9080 19.6 11.9 165 22.0 12.0 183 Blind Bull Sum 8650 41.4 20.8 199 -M 17.9 * East Rim Divide 7930 17.2 9.6 179 20.0 10.7 187 Elkhart Park G.S. 9400 18.0 11.0 164 22.6 12.0 188 Gros Ventre Summit 8750 17.4 11.8 147 22.1 11.6 191 Gunsight Pass 9820 19.9 12.3 162 22.4 12.2 184 Kendall R.S. 7740 21.1 11.4 185 27.8 13.1 212 Loomis Park 8240 26.0 13.7 190 30.8 15.7 196 New Fork Lake 8340 16.0 9.5 168 16.9 9.8 172 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 18.2 11.2 162 25.6 12.9 198 Spring Creek Divide 9000 37.7 21.6 175 37.7 21.8 173 Triple Peak 8500 34.5 20.0 172 38.1 23.1 165 ----- ----- Basin Index (%) 174 185 LOWER GREEN RIVER Blacks Fork Jct 8869 7.6 -M * 13.7 -M * Buck Pasture 9632 16.0 -M * 21.0 -M * EF Blacks Fork GS 9360 13.0 -M * 14.4 -M * Hams Fork 7840 13.5 10.5 129 19.1 10.3 185 Hewinta 9500 6.1 9.9 62 14.2 12.6 113 Hickerson Park 9122 5.7 6.8 84 8.8 9.1 97 Hole-in-Rock 9168 4.0 6.8 59 9.4 8.5 111 Indian Creek 9425 37.8 21.8 173 -M 20.5 * Kelley R.S. 8180 24.1 13.8 175 28.8 16.5 175 Spirit Lk 10235 12.8 -M * 15.5 -M * Steel Creek Park 10158 15.4 13.7 112 17.5 14.6 120 ----- ----- Basin Index (%) 128 137 UPPER BEAR RIVER Bear River RS 8777 7.6 -M * 15.6 -M * Bug Lake 7987 29.4 17.0 173 30.6 17.7 173 Burts Miller Ranch 8000 2.3 -M * 8.4 -M * Chalk Creek #1 9171 30.2 21.9 138 32.3 22.6 143 Hayden Fork 9130 17.1 14.5 118 27.1 18.9 143 Kelley R.S. 8180 24.1 13.8 175 28.8 16.5 175 Lily Lake 9133 10.9 11.5 95 17.0 15.3 111 Monte Cristo 8932 32.5 24.9 131 35.2 23.5 150 Salt River Summit 7760 19.7 12.2 161 -M 15.2 * ----- ----- Basin Index (%) 142 149 ----------------------------------------------------------------------------- -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.