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 SUNDAY: MAY 15 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 19.2 6.5 295 34.0 25.6 133 COTTONWOOD CREEK 7670 35.0 13.9 252 46.9 33.9 138 GRAND TARGHEE 9260 68.8 -M * 45.9 -M * GRANITE CREEK 6770 20.8 7.8 267 33.0 23.6 140 GRASSY LAKE 7265 44.2 26.5 167 54.9 42.9 128 GROS VENTRE SUMMIT 8750 19.6 9.9 198 22.5 16.4 137 GUNSIGHT PASS 9820 -M -M * 25.6 -M * LEWIS LAKE DIVIDE 7850 54.3 29.0 187 49.2 43.4 113 PHILLIPS BENCH 8200 42.7 24.1 177 45.6 34.8 131 SALT RIVER SUMMIT 7760 15.9 4.9 324 27.8 22.8 122 SNAKE RIVER STATION 6920 -M 5.7 * 35.4 26.9 132 SPRING CREEK DIVIDE 9000 43.6 24.7 177 41.8 31.6 132 THUMB DIVIDE 7980 23.7 9.7 244 28.6 23.4 122 TOGWOTEE PASS 9580 41.4 27.4 151 42.9 30.8 139 TWO OCEAN PLATEAU 9240 52.2 30.7 170 42.9 34.1 126 WILLOW CREEK 8380 46.7 25.3 185 55.1 40.1 137 ----- ----- Basin wide percent of average 191 130 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 33.7 25.5 132 33.4 25.2 133 BLACK BEAR 8170 56.6 36.5 155 58.2 48.0 121 CANYON 7870 17.2 7.1 242 24.9 19.0 131 FISHER CREEK 9100 52.3 36.6 143 52.4 44.1 119 MADISON PLATEAU 7750 35.2 19.5 181 41.2 32.1 128 NORTHEAST ENTRANCE 7350 8.8 3.3 267 21.1 16.0 132 PARKER PEAK 9400 39.9 24.0 166 -M 21.2 * SYLVAN LAKE 8420 30.4 20.3 150 38.6 26.6 145 THUMB DIVIDE 7980 23.7 9.7 244 28.6 23.4 122 TWO OCEAN PLATEAU 9240 52.2 30.7 170 42.9 34.1 126 WHISKEY CREEK 6800 19.7 9.8 201 31.0 25.6 121 WHITE MILL 8700 36.9 24.7 149 38.1 33.1 115 WOLVERINE 7650 10.8 3.2 338 19.9 16.7 119 ----- ----- Basin wide percent of average 166 125 WIND RIVER BURROUGHS CREEK 8750 22.8 10.4 219 26.2 20.9 125 CASTLE CREEK 8400 1.8 -M * 12.6 -M * COLD SPRINGS 9630 8.4 3.3 255 14.6 15.5 94 DEER PARK 9700 21.0 17.2 122 27.1 28.8 94 HOBBS PARK 10100 18.8 16.7 113 18.9 18.9 100 LITTLE WARM 9370 17.3 7.8 222 20.5 18.5 111 SOUTH PASS 9040 15.8 14.1 112 17.6 24.5 72 ST. LAWRENCE ALT 8620 1.2 3.7 32 13.4 13.7 98 TOGWOTEE PASS 9580 41.4 27.4 151 42.9 30.8 139 TOWNSEND CREEK 8700 4.8 5.7 84 14.6 17.2 85 ----- ----- Basin wide percent of average 143 104 BIGHORN BASIN BALD MTN. 9380 33.4 23.0 145 27.7 23.4 118 BEAR TRAP MEADOW 8200 9.5 .7 1357 14.4 12.5 115 BLACKWATER 9780 39.3 28.8 136 37.5 26.6 141 BONE SPRINGS DIV 9350 28.2 16.2 174 24.1 20.3 119 EVENING STAR 9200 42.0 32.5 129 46.8 32.0 146 GRAVE SPRINGS 8550 10.7 7.9 135 13.8 14.7 94 KIRWIN 9550 17.2 11.0 156 19.9 15.8 126 MARQUETTE 8760 9.3 -M * 13.2 15.8 84 MIDDLE POWDER 7760 14.5 11.1 131 15.3 17.5 87 OWL CREEK 8975 3.7 2.3 161 10.6 9.5 112 POWDER RIVER PASS 9480 20.8 8.1 257 25.8 17.6 147 SHELL CREEK 9580 25.0 16.3 153 23.8 18.6 128 SYLVAN LAKE 8420 30.4 20.3 150 38.6 26.6 145 SYLVAN ROAD 7120 8.8 2.7 326 28.9 21.9 132 TIMBER CREEK 7950 4.2 2.2 191 11.5 12.4 93 YOUNTS PEAK 8350 24.3 15.4 158 24.1 20.3 119 ----- ----- Basin wide percent of average 157 123 SHOSHONE RIVER BLACKWATER 9780 39.3 28.8 136 37.5 26.6 141 EVENING STAR 9200 42.0 32.5 129 46.8 32.0 146 KIRWIN 9550 17.2 11.0 156 19.9 15.8 126 MARQUETTE 8760 9.3 -M * 13.2 15.8 84 SYLVAN LAKE 8420 30.4 20.3 150 38.6 26.6 145 SYLVAN ROAD 7120 8.8 2.7 326 28.9 21.9 132 YOUNTS PEAK 8350 24.3 15.4 158 24.1 20.3 119 ----- ----- Basin wide percent of average 146 131 POWDER-TONGUE BEAR TRAP MEADOW 8200 9.5 .7 1357 14.4 12.5 115 BIG GOOSE 7990 12.2 9.1 134 16.9 14.8 114 BONE SPRINGS DIV 9350 28.2 16.2 174 24.1 20.3 119 BURGESS JUNCTION 7880 14.8 10.2 145 18.2 17.0 107 CLOUD PEAK RESERVOIR 9860 21.3 14.8 144 22.3 19.4 115 DOME LAKE 8880 18.5 10.4 178 20.7 18.8 110 GRAVE SPRINGS 8550 10.7 7.9 135 13.8 14.7 94 HANSEN SAWMILL 8360 9.1 2.2 414 13.9 12.4 112 LITTLE GOOSE 8870 15.1 -M * 21.4 -M * MIDDLE POWDER 7760 14.5 11.1 131 15.3 17.5 87 POWDER RIVER PASS 9480 20.8 8.1 257 25.8 17.6 147 SOLDIER PARK 8720 10.7 -M * 14.5 -M * SUCKER CREEK 8880 19.1 10.2 187 23.0 19.5 118 TIE CREEK 6870 5.9 1.3 454 16.0 15.4 104 ----- ----- Basin wide percent of average 181 112 BELLE FOURCHE BLIND PARK 6890 4.5 .1 4500* 22.9 15.9 144 COLE CANYON 5910 3.1 .8 388 17.9 11.2 160 NORTH RAPID CREEK 6130 .0 .6 0* 17.9 12.7 141 ----- ----- Basin wide percent of average 507* 147 UPPER N. PLATTE RIVER CINNABAR PARK 9574 31.6 11.0 287 43.1 25.4 170 COLUMBINE 9160 33.7 13.1 257 45.3 30.7 148 DIVIDE PEAK 8880 29.5 12.8 230 38.2 25.9 147 ELK RIVER 8700 23.9 7.6 314 34.9 24.5 142 JOE WRIGHT 10120 49.9 23.8 210 49.9 32.5 154 NORTH FRENCH CREEK 10130 61.7 33.2 186 61.6 32.0 193 OLD BATTLE 10000 57.7 35.5 163 62.3 42.2 148 SAGE CREEK BASIN 7850 7.5 7.4 101 24.3 15.0 162 SOUTH BRUSH CREEK 8440 18.9 6.5 291 31.5 21.9 144 TOWER 10500 74.2 51.5 144 68.4 47.7 143 WEBBER SPRINGS 9250 36.1 18.1 199 47.7 33.0 145 WILLOW CREEK PASS 9540 25.8 11.2 230 26.3 17.1 154 ----- ----- Basin wide percent of average 194 153 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 39.6 23.1 171 42.3 29.2 145 CASPER MTN. 7900 10.7 11.7 91 20.0 21.8 92 DEADMAN HILL 10220 30.8 18.0 171 32.3 22.9 141 DEER PARK 9700 21.0 17.2 122 27.1 28.8 94 LAPRELE CREEK 8375 11.2 3.6 311 19.4 18.2 107 RENO HILL 8400 17.8 9.7 184 24.6 22.5 109 ROACH 9700 26.4 13.4 197 32.6 24.4 134 SAND LAKE 10050 50.1 35.5 141 48.7 31.8 153 SOUTH PASS 9040 15.8 14.1 112 17.6 24.5 72 WINDY PEAK 7900 5.4 1.7 318 17.9 15.2 118 ----- ----- Basin wide percent of average 155 118 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M .6 * 22.4 19.8 113 DIVIDE PEAK 8880 29.5 12.8 230 38.2 25.9 147 OLD BATTLE 10000 57.7 35.5 163 62.3 42.2 148 SANDSTONE RS 8150 16.3 3.8 429 34.2 23.4 146 WHISKEY PARK 8950 -M 26.5 * 54.9 36.0 153 ----- ----- Basin wide percent of average 199 144 UPPER GREEN RIVER BIG SANDY OPENING 9080 17.1 9.0 190 20.6 17.2 120 BLIND BULL SUM 8650 44.8 24.9 180 31.1 26.6 117 EAST RIM DIVIDE 7930 8.9 9.2 97 18.6 14.9 125 ELKHART PARK G.S. 9400 16.8 9.4 179 18.7 17.4 107 GROS VENTRE SUMMIT 8750 19.6 9.9 198 22.5 16.4 137 GUNSIGHT PASS 9820 -M -M * 25.6 -M * KENDALL R.S. 7740 10.4 3.7 281 22.1 17.5 126 LOOMIS PARK 8240 21.8 9.7 225 29.2 21.2 138 NEW FORK LAKE 8340 10.0 3.8 263 15.5 14.5 107 POCKET CREEK 9360 15.7 -M * 19.4 -M * SNIDER BASIN 8060 17.8 7.7 231 24.5 19.4 126 SPRING CREEK DIVIDE 9000 43.6 24.7 177 41.8 31.6 132 TRIPLE PEAK 8500 38.5 17.1 225 44.8 30.3 148 ----- ----- Basin wide percent of average 193 127 LOWER GREEN RIVER HAMS FORK 7840 7.1 1.1 645* 19.6 15.9 123 HEWINTA 9519 13.3 4.5 296 24.7 19.0 130 HICKERSON PARK 9145 .1 2.1 5 14.7 11.4 129 HOLE-IN-ROCK 9150 4.1 1.7 241 16.4 10.9 150 INDIAN CREEK 9425 38.5 23.7 162 34.5 31.0 111 KELLEY R.S. 8180 19.9 9.1 219 30.5 24.9 122 STEEL CREEK PARK 10200 26.3 18.1 145 28.8 21.6 133 ----- ----- Basin wide percent of average 181 126 UPPER BEAR RIVER BUG LAKE 7950 32.8 10.9 301 36.9 23.8 155 HAYDEN FORK 9212 22.4 7.3 307 39.2 26.8 146 KELLEY R.S. 8180 19.9 9.1 219 30.5 24.9 122 LILY LAKE 9156 23.5 6.3 373 30.5 22.6 135 MONTE CRISTO 8960 47.1 22.7 207 47.7 32.2 148 SALT RIVER SUMMIT 7760 15.9 4.9 324 27.8 22.8 122 TRIAL LAKE 9992 50.1 23.2 216 44.1 31.3 141 ----- ----- Basin wide percent of average 251 139 ----------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. Units = inches for the Current and Average Snow Water Equivalent and Total Precipitation values If the Basin wide percent of average 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 Average represents the snow water equivalent found at selected SNOTEL sites in or near the basin compared to the average 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. Reference period for average conditions is 1971-2000. Provisional data, subject to revision. ---------------------------------------------------------------------------- -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.