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: MAY 12 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 22.4 7.9 284 33.9 25.3 134 COTTONWOOD CREEK 7670 36.5 15.3 239 46.8 33.5 140 GRAND TARGHEE 9260 66.5 -M * -M -M * GRANITE CREEK 6770 23.2 9.0 258 32.8 23.3 141 GRASSY LAKE 7265 46.4 28.3 164 54.8 42.4 129 GROS VENTRE SUMMIT 8750 20.3 10.8 188 22.2 16.1 138 GUNSIGHT PASS 9820 -M -M * 25.4 -M * LEWIS LAKE DIVIDE 7850 56.4 30.5 185 49.0 43.1 114 PHILLIPS BENCH 8200 43.6 25.5 171 45.3 34.4 132 SALT RIVER SUMMIT 7760 18.7 6.2 302 27.7 22.6 123 SNAKE RIVER STATION 6920 -M 7.2 * 35.3 26.6 133 SPRING CREEK DIVIDE 9000 44.7 25.9 173 41.8 31.3 134 THUMB DIVIDE 7980 27.6 10.9 253 28.6 23.1 124 TOGWOTEE PASS 9580 41.8 27.8 150 -M 30.4 * TWO OCEAN PLATEAU 9240 -M 31.1 * -M 33.7 * WILLOW CREEK 8380 48.2 26.8 180 55.1 39.7 139 ----- ----- Basin wide percent of average 191 131 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 34.2 25.7 133 33.3 24.9 134 BLACK BEAR 8170 56.5 37.5 151 58.1 47.6 122 CANYON 7870 19.8 8.0 248 24.8 18.7 133 FISHER CREEK 9100 53.7 37.3 144 52.4 43.7 120 MADISON PLATEAU 7750 37.2 20.9 178 41.2 31.7 130 NORTHEAST ENTRANCE 7350 12.1 4.4 275 21.1 15.8 134 PARKER PEAK 9400 40.2 24.2 166 34.8 20.9 167 SYLVAN LAKE 8420 32.8 21.3 154 38.6 26.2 147 THUMB DIVIDE 7980 27.6 10.9 253 28.6 23.1 124 TWO OCEAN PLATEAU 9240 -M 31.1 * -M 33.7 * WHISKEY CREEK 6800 22.1 11.3 196 31.0 25.3 123 WHITE MILL 8700 37.9 25.5 149 38.0 32.7 116 WOLVERINE 7650 13.9 4.2 331 19.9 16.4 121 ----- ----- Basin wide percent of average 168 129 WIND RIVER BURROUGHS CREEK 8750 23.1 11.1 208 25.7 20.5 125 CASTLE CREEK 8400 3.3 -M * 12.0 -M * COLD SPRINGS 9630 9.1 4.0 228 14.5 15.2 95 DEER PARK 9700 21.5 17.0 126 26.9 28.4 95 HOBBS PARK 10100 19.0 17.3 110 18.4 18.5 99 LITTLE WARM 9370 17.8 8.5 209 20.3 18.1 112 SOUTH PASS 9040 16.9 15.1 112 17.5 24.2 72 ST. LAWRENCE ALT 8620 2.2 4.5 49 13.0 13.4 97 TOGWOTEE PASS 9580 41.8 27.8 150 -M 30.4 * TOWNSEND CREEK 8700 6.0 6.5 92 14.3 16.9 85 ----- ----- Basin wide percent of average 141 97 BIGHORN BASIN BALD MTN. 9380 33.7 23.5 143 27.6 23.0 120 BEAR TRAP MEADOW 8200 10.1 1.1 918 14.4 12.1 119 BLACKWATER 9780 39.7 28.8 138 37.5 26.2 143 BONE SPRINGS DIV 9350 29.0 16.9 172 24.2 19.9 122 EVENING STAR 9200 43.1 32.9 131 46.8 31.5 149 GRAVE SPRINGS 8550 11.4 9.2 124 13.7 14.4 95 KIRWIN 9550 17.7 11.9 149 19.7 15.5 127 MARQUETTE 8760 9.9 -M * 13.3 15.3 87 MIDDLE POWDER 7760 15.1 11.9 127 15.2 17.2 88 OWL CREEK 8975 4.5 2.8 161 10.1 9.2 110 POWDER RIVER PASS 9480 21.1 8.8 240 25.8 17.3 149 SHELL CREEK 9580 25.4 16.7 152 23.7 18.3 130 SYLVAN LAKE 8420 32.8 21.3 154 38.6 26.2 147 SYLVAN ROAD 7120 12.1 3.7 327 29.0 21.6 134 TIMBER CREEK 7950 5.2 2.8 186 11.4 12.0 95 YOUNTS PEAK 8350 25.0 16.5 152 24.0 20.0 120 ----- ----- Basin wide percent of average 156 125 SHOSHONE RIVER BLACKWATER 9780 39.7 28.8 138 37.5 26.2 143 EVENING STAR 9200 43.1 32.9 131 46.8 31.5 149 KIRWIN 9550 17.7 11.9 149 19.7 15.5 127 MARQUETTE 8760 9.9 -M * 13.3 15.3 87 SYLVAN LAKE 8420 32.8 21.3 154 38.6 26.2 147 SYLVAN ROAD 7120 12.1 3.7 327 29.0 21.6 134 YOUNTS PEAK 8350 25.0 16.5 152 24.0 20.0 120 ----- ----- Basin wide percent of average 148 134 POWDER-TONGUE BEAR TRAP MEADOW 8200 10.1 1.1 918 14.4 12.1 119 BIG GOOSE 7990 13.1 9.7 135 17.0 14.5 117 BONE SPRINGS DIV 9350 29.0 16.9 172 24.2 19.9 122 BURGESS JUNCTION 7880 15.8 11.1 142 18.3 16.7 110 CLOUD PEAK RESERVOIR 9860 22.4 15.4 145 22.4 18.9 119 DOME LAKE 8880 19.4 11.2 173 20.7 18.4 113 GRAVE SPRINGS 8550 11.4 9.2 124 13.7 14.4 95 HANSEN SAWMILL 8360 9.8 3.0 327 13.9 12.1 115 LITTLE GOOSE 8870 15.7 -M * 21.5 -M * MIDDLE POWDER 7760 15.1 11.9 127 15.2 17.2 88 POWDER RIVER PASS 9480 21.1 8.8 240 25.8 17.3 149 SOLDIER PARK 8720 11.4 -M * 14.5 -M * SUCKER CREEK 8880 19.7 11.0 179 23.0 19.1 120 TIE CREEK 6870 7.2 2.1 343 15.8 15.0 105 ----- ----- Basin wide percent of average 174 115 BELLE FOURCHE BLIND PARK 6890 5.3 .8 663* 22.7 15.6 146 COLE CANYON 5910 4.1 1.2 342 17.6 10.9 161 NORTH RAPID CREEK 6130 .0 .9 0 17.7 12.5 142 ----- ----- Basin wide percent of average 324 149 UPPER N. PLATTE RIVER CINNABAR PARK 9574 32.6 12.5 261 43.1 25.1 172 COLUMBINE 9160 36.2 15.1 240 45.2 30.4 149 DIVIDE PEAK 8880 30.0 14.5 207 38.3 25.6 150 ELK RIVER 8700 26.1 9.2 284 34.9 24.2 144 JOE WRIGHT 10120 49.2 24.4 202 49.4 32.0 154 NORTH FRENCH CREEK 10130 62.3 33.8 184 -M 31.6 * OLD BATTLE 10000 57.2 36.4 157 61.5 41.7 147 SAGE CREEK BASIN 7850 10.7 8.4 127 24.4 14.8 165 SOUTH BRUSH CREEK 8440 20.2 7.6 266 31.3 21.5 146 TOWER 10500 73.8 52.1 142 68.3 47.3 144 WEBBER SPRINGS 9250 37.2 20.0 186 47.5 32.6 146 WILLOW CREEK PASS 9540 25.7 12.3 209 25.7 16.8 153 ----- ----- Basin wide percent of average 187 151 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 40.1 24.8 162 42.0 28.7 146 CASPER MTN. 7900 11.0 13.2 83 19.8 21.3 93 DEADMAN HILL 10220 30.7 18.7 164 32.0 22.5 142 DEER PARK 9700 21.5 17.0 126 26.9 28.4 95 LAPRELE CREEK 8375 11.6 4.3 270 19.4 17.9 108 RENO HILL 8400 17.9 10.9 164 24.5 22.1 111 ROACH 9700 26.6 14.8 180 32.5 24.0 135 SAND LAKE 10050 50.2 36.2 139 48.4 31.3 155 SOUTH PASS 9040 16.9 15.1 112 17.5 24.2 72 WINDY PEAK 7900 6.1 2.3 265 17.8 14.8 120 ----- ----- Basin wide percent of average 148 119 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 1.5 * 22.4 19.6 114 DIVIDE PEAK 8880 30.0 14.5 207 38.3 25.6 150 OLD BATTLE 10000 57.2 36.4 157 61.5 41.7 147 SANDSTONE RS 8150 18.7 4.9 382 34.2 23.1 148 WHISKEY PARK 8950 -M 27.9 * 54.9 35.6 154 ----- ----- Basin wide percent of average 190 145 UPPER GREEN RIVER BIG SANDY OPENING 9080 18.0 10.2 176 20.6 16.9 122 BLIND BULL SUM 8650 45.5 25.8 176 31.1 26.3 118 EAST RIM DIVIDE 7930 13.1 10.3 127 18.5 14.7 126 ELKHART PARK G.S. 9400 17.8 10.3 173 18.7 17.1 109 GROS VENTRE SUMMIT 8750 20.3 10.8 188 22.2 16.1 138 GUNSIGHT PASS 9820 -M -M * 25.4 -M * KENDALL R.S. 7740 12.6 5.2 242 21.9 17.3 127 LOOMIS PARK 8240 23.8 10.8 220 28.9 20.9 138 NEW FORK LAKE 8340 12.9 4.9 263 15.6 14.3 109 POCKET CREEK 9360 16.6 -M * 19.3 -M * SNIDER BASIN 8060 20.8 8.9 234 24.5 19.3 127 SPRING CREEK DIVIDE 9000 44.7 25.9 173 41.8 31.3 134 TRIPLE PEAK 8500 41.1 18.9 217 44.8 30.0 149 ----- ----- Basin wide percent of average 191 129 LOWER GREEN RIVER HAMS FORK 7840 10.8 2.2 491 19.5 15.7 124 HEWINTA 9519 15.4 5.5 280 24.6 18.8 131 HICKERSON PARK 9145 1.4 2.8 50 14.6 11.1 132 HOLE-IN-ROCK 9150 6.5 2.3 283 16.3 10.7 152 INDIAN CREEK 9425 39.2 25.0 157 34.5 30.7 112 KELLEY R.S. 8180 22.9 10.3 222 30.5 24.6 124 STEEL CREEK PARK 10200 26.3 18.6 141 28.8 21.4 135 ----- ----- Basin wide percent of average 184 127 UPPER BEAR RIVER BUG LAKE 7950 34.8 12.5 278 36.9 23.5 157 HAYDEN FORK 9212 25.8 8.6 300 39.1 26.4 148 KELLEY R.S. 8180 22.9 10.3 222 30.5 24.6 124 LILY LAKE 9156 25.6 7.4 346 30.3 22.3 136 MONTE CRISTO 8960 48.2 24.1 200 47.6 31.9 149 SALT RIVER SUMMIT 7760 18.7 6.2 302 27.7 22.6 123 TRIAL LAKE 9992 50.0 24.3 206 44.0 30.9 142 ----- ----- Basin wide percent of average 242 141 ----------------------------------------------------------------------------- -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.