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: MAY 10 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 22.9 8.7 263 33.3 25.2 132 COTTONWOOD CREEK 7670 36.9 16.2 228 46.8 33.2 141 GRAND TARGHEE 9260 65.9 -M * 46.0 -M * GRANITE CREEK 6770 23.7 9.7 244 32.5 23.1 141 GRASSY LAKE 7265 46.2 29.3 158 54.6 42.2 129 GROS VENTRE SUMMIT 8750 20.1 11.3 178 21.5 16.0 134 GUNSIGHT PASS 9820 -M -M * 24.6 -M * LEWIS LAKE DIVIDE 7850 56.9 31.4 181 48.8 42.8 114 PHILLIPS BENCH 8200 43.7 26.4 166 44.9 34.2 131 SALT RIVER SUMMIT 7760 19.1 7.1 269 27.7 22.4 124 SNAKE RIVER STATION 6920 -M 8.2 * 35.2 26.4 133 SPRING CREEK DIVIDE 9000 44.9 26.6 169 41.5 31.1 133 THUMB DIVIDE 7980 28.0 11.7 239 28.4 22.9 124 TOGWOTEE PASS 9580 41.1 28.0 147 40.4 30.2 134 TWO OCEAN PLATEAU 9240 -M 31.4 * -M 33.4 * WILLOW CREEK 8380 48.3 27.6 175 54.7 39.3 139 ----- ----- Basin wide percent of average 185 131 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 34.3 25.9 132 33.3 24.6 135 BLACK BEAR 8170 56.9 38.1 149 57.9 47.3 122 CANYON 7870 20.6 8.6 240 24.6 18.5 133 FISHER CREEK 9100 53.5 37.4 143 52.1 43.4 120 MADISON PLATEAU 7750 37.3 21.5 173 41.1 31.5 130 NORTHEAST ENTRANCE 7350 13.3 5.0 266 21.1 15.6 135 PARKER PEAK 9400 40.1 24.4 164 34.6 20.6 168 SYLVAN LAKE 8420 33.3 21.8 153 38.4 25.9 148 THUMB DIVIDE 7980 28.0 11.7 239 28.4 22.9 124 TWO OCEAN PLATEAU 9240 -M 31.4 * -M 33.4 * WHISKEY CREEK 6800 22.7 12.1 188 30.6 25.1 122 WHITE MILL 8700 37.9 25.8 147 37.9 32.4 117 WOLVERINE 7650 14.9 4.7 317 19.5 16.1 121 ----- ----- Basin wide percent of average 166 130 WIND RIVER BURROUGHS CREEK 8750 22.4 11.4 196 24.7 20.3 122 CASTLE CREEK 8400 2.9 -M * 11.4 -M * COLD SPRINGS 9630 8.6 4.2 205 13.7 15.0 91 DEER PARK 9700 21.3 16.3 131 26.5 28.1 94 HOBBS PARK 10100 18.1 17.3 105 17.7 18.3 97 LITTLE WARM 9370 17.1 8.9 192 19.4 17.9 108 SOUTH PASS 9040 16.7 15.7 106 17.4 23.9 73 ST. LAWRENCE ALT 8620 1.5 4.8 31 12.3 13.2 93 TOGWOTEE PASS 9580 41.1 28.0 147 40.4 30.2 134 TOWNSEND CREEK 8700 5.6 7.0 80 14.0 16.7 84 ----- ----- Basin wide percent of average 134 101 BIGHORN BASIN BALD MTN. 9380 33.3 23.6 141 27.0 22.7 119 BEAR TRAP MEADOW 8200 9.3 1.4 664 13.3 11.9 112 BLACKWATER 9780 39.0 28.7 136 36.7 26.0 141 BONE SPRINGS DIV 9350 28.4 17.2 165 23.8 19.6 121 EVENING STAR 9200 42.7 33.2 129 46.4 31.2 149 GRAVE SPRINGS 8550 11.1 9.6 116 13.4 14.2 94 KIRWIN 9550 17.2 12.1 142 19.1 15.3 125 MARQUETTE 8760 8.8 -M * 12.3 15.1 81 MIDDLE POWDER 7760 13.8 12.4 111 14.6 16.9 86 OWL CREEK 8975 4.0 3.1 129 9.5 9.1 104 POWDER RIVER PASS 9480 20.3 9.2 221 25.0 17.0 147 SHELL CREEK 9580 24.5 16.9 145 22.7 18.0 126 SYLVAN LAKE 8420 33.3 21.8 153 38.4 25.9 148 SYLVAN ROAD 7120 12.4 4.8 258 28.8 21.4 135 TIMBER CREEK 7950 4.5 3.3 136 10.5 11.8 89 YOUNTS PEAK 8350 24.5 16.8 146 23.6 19.7 120 ----- ----- Basin wide percent of average 149 123 SHOSHONE RIVER BLACKWATER 9780 39.0 28.7 136 36.7 26.0 141 EVENING STAR 9200 42.7 33.2 129 46.4 31.2 149 KIRWIN 9550 17.2 12.1 142 19.1 15.3 125 MARQUETTE 8760 8.8 -M * 12.3 15.1 81 SYLVAN LAKE 8420 33.3 21.8 153 38.4 25.9 148 SYLVAN ROAD 7120 12.4 4.8 258 28.8 21.4 135 YOUNTS PEAK 8350 24.5 16.8 146 23.6 19.7 120 ----- ----- Basin wide percent of average 144 133 POWDER-TONGUE BEAR TRAP MEADOW 8200 9.3 1.4 664 13.3 11.9 112 BIG GOOSE 7990 12.6 10.1 125 16.3 14.2 115 BONE SPRINGS DIV 9350 28.4 17.2 165 23.8 19.6 121 BURGESS JUNCTION 7880 15.4 11.7 132 17.7 16.5 107 CLOUD PEAK RESERVOIR 9860 21.7 15.6 139 21.8 18.6 117 DOME LAKE 8880 19.1 11.6 165 20.0 18.1 110 GRAVE SPRINGS 8550 11.1 9.6 116 13.4 14.2 94 HANSEN SAWMILL 8360 9.0 3.5 257 12.9 11.9 108 LITTLE GOOSE 8870 15.2 -M * 20.8 -M * MIDDLE POWDER 7760 13.8 12.4 111 14.6 16.9 86 POWDER RIVER PASS 9480 20.3 9.2 221 25.0 17.0 147 SOLDIER PARK 8720 10.8 -M * 13.9 -M * SUCKER CREEK 8880 18.8 11.6 162 21.9 18.8 116 TIE CREEK 6870 7.0 2.5 280 15.4 14.7 105 ----- ----- Basin wide percent of average 160 112 BELLE FOURCHE BLIND PARK 6890 5.8 1.6 363 22.2 15.3 145 COLE CANYON 5910 5.0 1.7 294 17.1 10.7 160 NORTH RAPID CREEK 6130 .9 1.3 69 17.4 12.3 141 ----- ----- Basin wide percent of average 254 148 UPPER N. PLATTE RIVER CINNABAR PARK 9574 32.0 13.4 239 42.6 24.8 172 COLUMBINE 9160 36.6 16.3 225 44.5 30.2 147 DIVIDE PEAK 8880 29.7 15.5 192 37.5 25.3 148 ELK RIVER 8700 26.3 10.3 255 34.5 24.0 144 JOE WRIGHT 10120 48.2 24.7 195 48.5 31.6 153 NORTH FRENCH CREEK 10130 62.5 34.2 183 -M 31.3 * OLD BATTLE 10000 56.8 36.8 154 61.4 41.4 148 SAGE CREEK BASIN 7850 11.2 9.0 124 24.2 14.7 165 SOUTH BRUSH CREEK 8440 20.9 8.3 252 31.0 21.3 146 TOWER 10500 73.2 52.3 140 -M 46.9 * WEBBER SPRINGS 9250 37.9 21.2 179 46.7 32.4 144 WILLOW CREEK PASS 9540 25.5 12.8 199 25.1 16.6 151 ----- ----- Basin wide percent of average 181 151 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 40.7 25.7 158 41.7 28.4 147 CASPER MTN. 7900 10.9 14.1 77 19.2 21.0 91 DEADMAN HILL 10220 30.4 19.1 159 31.0 22.2 140 DEER PARK 9700 21.3 16.3 131 26.5 28.1 94 LAPRELE CREEK 8375 11.6 4.8 242 18.8 17.6 107 RENO HILL 8400 16.7 11.8 142 23.2 21.7 107 ROACH 9700 26.3 15.7 168 31.6 23.7 133 SAND LAKE 10050 49.8 36.6 136 47.9 31.0 155 SOUTH PASS 9040 16.7 15.7 106 17.4 23.9 73 WINDY PEAK 7900 6.3 2.7 233 17.3 14.6 118 ----- ----- Basin wide percent of average 142 118 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 2.0 * 22.3 19.4 115 DIVIDE PEAK 8880 29.7 15.5 192 37.5 25.3 148 OLD BATTLE 10000 56.8 36.8 154 61.4 41.4 148 SANDSTONE RS 8150 20.2 5.8 348 34.1 22.9 149 WHISKEY PARK 8950 -M 28.6 * 54.3 35.3 154 ----- ----- Basin wide percent of average 184 145 UPPER GREEN RIVER BIG SANDY OPENING 9080 17.8 10.9 163 20.3 16.8 121 BLIND BULL SUM 8650 45.5 26.2 174 30.8 26.1 118 EAST RIM DIVIDE 7930 13.6 10.9 125 18.2 14.5 126 ELKHART PARK G.S. 9400 17.7 10.9 162 18.4 16.9 109 GROS VENTRE SUMMIT 8750 20.1 11.3 178 21.5 16.0 134 GUNSIGHT PASS 9820 -M -M * 24.6 -M * KENDALL R.S. 7740 12.9 6.2 208 21.6 17.2 126 LOOMIS PARK 8240 23.6 11.5 205 28.4 20.7 137 NEW FORK LAKE 8340 13.1 5.6 234 15.2 14.1 108 POCKET CREEK 9360 16.1 -M * 19.1 -M * SNIDER BASIN 8060 20.5 9.7 211 24.3 19.1 127 SPRING CREEK DIVIDE 9000 44.9 26.6 169 41.5 31.1 133 TRIPLE PEAK 8500 41.2 19.9 207 44.5 29.7 150 ----- ----- Basin wide percent of average 181 128 LOWER GREEN RIVER HAMS FORK 7840 11.9 2.9 410 19.4 15.5 125 HEWINTA 9519 14.7 6.2 237 24.1 18.6 130 HICKERSON PARK 9145 1.4 3.3 42 14.3 11.0 130 HOLE-IN-ROCK 9150 -M 2.8 * 16.2 10.5 154 INDIAN CREEK 9425 39.0 25.7 152 34.3 30.5 112 KELLEY R.S. 8180 23.0 11.1 207 30.4 24.4 125 STEEL CREEK PARK 10200 25.8 18.8 137 28.1 21.2 133 ----- ----- Basin wide percent of average 170 127 UPPER BEAR RIVER BUG LAKE 7950 34.6 13.6 254 36.8 23.3 158 HAYDEN FORK 9212 25.9 9.5 273 38.7 26.2 148 KELLEY R.S. 8180 23.0 11.1 207 30.4 24.4 125 LILY LAKE 9156 25.2 8.1 311 29.9 22.1 135 MONTE CRISTO 8960 48.5 25.0 194 47.3 31.6 150 SALT RIVER SUMMIT 7760 19.1 7.1 269 27.7 22.4 124 TRIAL LAKE 9992 -M 24.9 * 43.5 30.7 142 ----- ----- Basin wide percent of average 237 141 ----------------------------------------------------------------------------- -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.