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 WEDNESDAY: MAY 11 , 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 8.3 276 33.7 25.2 134 COTTONWOOD CREEK 7670 37.0 15.8 234 46.9 33.4 140 GRAND TARGHEE 9260 66.5 -M * -M -M * GRANITE CREEK 6770 23.7 9.4 252 32.7 23.2 141 GRASSY LAKE 7265 46.4 28.8 161 54.8 42.3 130 GROS VENTRE SUMMIT 8750 20.8 11.0 189 22.1 16.1 137 GUNSIGHT PASS 9820 -M -M * 25.1 -M * LEWIS LAKE DIVIDE 7850 56.6 30.9 183 48.9 43.0 114 PHILLIPS BENCH 8200 43.8 26.0 168 45.3 34.3 132 SALT RIVER SUMMIT 7760 19.1 6.7 285 27.7 22.5 123 SNAKE RIVER STATION 6920 -M 7.7 * 35.4 26.5 134 SPRING CREEK DIVIDE 9000 44.7 26.2 171 41.7 31.2 134 THUMB DIVIDE 7980 28.2 11.3 250 28.6 23.0 124 TOGWOTEE PASS 9580 41.7 27.9 149 -M 30.3 * TWO OCEAN PLATEAU 9240 -M 31.2 * -M 33.5 * WILLOW CREEK 8380 48.2 27.2 177 55.0 39.5 139 ----- ----- Basin wide percent of average 189 131 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 34.4 25.9 133 33.4 24.7 135 BLACK BEAR 8170 57.0 37.8 151 58.1 47.4 123 CANYON 7870 20.4 8.3 246 24.7 18.6 133 FISHER CREEK 9100 53.6 37.5 143 52.2 43.5 120 MADISON PLATEAU 7750 37.5 21.2 177 41.2 31.6 130 NORTHEAST ENTRANCE 7350 13.0 4.7 277 21.1 15.7 134 PARKER PEAK 9400 40.3 24.3 166 34.8 20.7 168 SYLVAN LAKE 8420 33.3 21.6 154 38.6 26.0 148 THUMB DIVIDE 7980 28.2 11.3 250 28.6 23.0 124 TWO OCEAN PLATEAU 9240 -M 31.2 * -M 33.5 * WHISKEY CREEK 6800 -M 11.7 * 30.9 25.2 123 WHITE MILL 8700 37.9 25.7 147 37.9 32.6 116 WOLVERINE 7650 14.6 4.5 324 19.8 16.3 121 ----- ----- Basin wide percent of average 166 130 WIND RIVER BURROUGHS CREEK 8750 23.2 11.2 207 25.6 20.4 125 CASTLE CREEK 8400 3.5 -M * 12.0 -M * COLD SPRINGS 9630 9.1 4.1 222 14.3 15.1 95 DEER PARK 9700 21.5 16.8 128 26.8 28.3 95 HOBBS PARK 10100 18.9 17.4 109 18.3 18.4 99 LITTLE WARM 9370 17.8 8.7 205 20.2 18.0 112 SOUTH PASS 9040 16.9 15.5 109 17.5 24.1 73 ST. LAWRENCE ALT 8620 2.2 4.7 47 13.0 13.3 98 TOGWOTEE PASS 9580 41.7 27.9 149 -M 30.3 * TOWNSEND CREEK 8700 6.0 6.8 88 14.2 16.8 85 ----- ----- Basin wide percent of average 139 97 BIGHORN BASIN BALD MTN. 9380 33.7 23.5 143 27.5 22.8 121 BEAR TRAP MEADOW 8200 9.9 1.3 762 14.2 12.0 118 BLACKWATER 9780 39.7 28.7 138 37.3 26.1 143 BONE SPRINGS DIV 9350 29.0 17.1 170 24.2 19.7 123 EVENING STAR 9200 43.1 33.0 131 46.7 31.4 149 GRAVE SPRINGS 8550 11.2 9.4 119 13.6 14.3 95 KIRWIN 9550 17.7 12.0 148 19.7 15.4 128 MARQUETTE 8760 9.8 -M * 13.2 15.2 87 MIDDLE POWDER 7760 14.9 12.1 123 15.0 17.0 88 OWL CREEK 8975 4.6 3.0 153 10.0 9.2 109 POWDER RIVER PASS 9480 21.0 9.0 233 25.7 17.1 150 SHELL CREEK 9580 25.3 16.8 151 23.7 18.2 130 SYLVAN LAKE 8420 33.3 21.6 154 38.6 26.0 148 SYLVAN ROAD 7120 12.4 4.1 302 29.0 21.5 135 TIMBER CREEK 7950 5.3 3.0 177 11.4 11.9 96 YOUNTS PEAK 8350 25.0 16.6 151 24.0 19.8 121 ----- ----- Basin wide percent of average 154 126 SHOSHONE RIVER BLACKWATER 9780 39.7 28.7 138 37.3 26.1 143 EVENING STAR 9200 43.1 33.0 131 46.7 31.4 149 KIRWIN 9550 17.7 12.0 148 19.7 15.4 128 MARQUETTE 8760 9.8 -M * 13.2 15.2 87 SYLVAN LAKE 8420 33.3 21.6 154 38.6 26.0 148 SYLVAN ROAD 7120 12.4 4.1 302 29.0 21.5 135 YOUNTS PEAK 8350 25.0 16.6 151 24.0 19.8 121 ----- ----- Basin wide percent of average 148 134 POWDER-TONGUE BEAR TRAP MEADOW 8200 9.9 1.3 762 14.2 12.0 118 BIG GOOSE 7990 13.1 9.9 132 16.9 14.3 118 BONE SPRINGS DIV 9350 29.0 17.1 170 24.2 19.7 123 BURGESS JUNCTION 7880 15.9 11.4 139 18.3 16.6 110 CLOUD PEAK RESERVOIR 9860 22.4 15.5 145 22.3 18.8 119 DOME LAKE 8880 19.4 11.4 170 20.6 18.2 113 GRAVE SPRINGS 8550 11.2 9.4 119 13.6 14.3 95 HANSEN SAWMILL 8360 9.7 3.2 303 13.8 12.0 115 LITTLE GOOSE 8870 15.7 -M * 21.5 -M * MIDDLE POWDER 7760 14.9 12.1 123 15.0 17.0 88 POWDER RIVER PASS 9480 21.0 9.0 233 25.7 17.1 150 SOLDIER PARK 8720 11.3 -M * 14.5 -M * SUCKER CREEK 8880 19.6 11.2 175 22.8 19.0 120 TIE CREEK 6870 7.2 2.4 300 15.8 14.9 106 ----- ----- Basin wide percent of average 170 115 BELLE FOURCHE BLIND PARK 6890 5.1 1.3 392 22.3 15.5 144 COLE CANYON 5910 4.2 1.4 300 17.2 10.8 159 NORTH RAPID CREEK 6130 .0 1.1 0 17.3 12.4 140 ----- ----- Basin wide percent of average 245 147 UPPER N. PLATTE RIVER CINNABAR PARK 9574 32.1 13.0 247 42.6 24.9 171 COLUMBINE 9160 35.7 15.7 227 44.7 30.3 148 DIVIDE PEAK 8880 29.3 15.0 195 37.6 25.4 148 ELK RIVER 8700 26.0 9.8 265 34.6 24.1 144 JOE WRIGHT 10120 48.2 24.6 196 48.6 31.8 153 NORTH FRENCH CREEK 10130 62.4 34.0 184 -M 31.4 * OLD BATTLE 10000 56.8 36.6 155 61.4 41.6 148 SAGE CREEK BASIN 7850 10.4 8.7 120 24.2 14.8 164 SOUTH BRUSH CREEK 8440 20.1 7.9 254 31.0 21.4 145 TOWER 10500 73.4 52.2 141 -M 47.1 * WEBBER SPRINGS 9250 37.4 20.6 182 46.9 32.5 144 WILLOW CREEK PASS 9540 25.3 12.6 201 25.2 16.7 151 ----- ----- Basin wide percent of average 182 151 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 40.4 25.3 160 41.7 28.6 146 CASPER MTN. 7900 10.6 13.7 77 19.3 21.2 91 DEADMAN HILL 10220 30.2 18.9 160 31.1 22.4 139 DEER PARK 9700 21.5 16.8 128 26.8 28.3 95 LAPRELE CREEK 8375 11.2 4.6 243 18.8 17.8 106 RENO HILL 8400 16.6 11.4 146 23.3 21.9 106 ROACH 9700 26.0 15.3 170 31.8 23.9 133 SAND LAKE 10050 49.8 36.4 137 47.9 31.2 154 SOUTH PASS 9040 16.9 15.5 109 17.5 24.1 73 WINDY PEAK 7900 5.5 2.5 220 17.2 14.7 117 ----- ----- Basin wide percent of average 143 118 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 1.7 * 22.3 19.5 114 DIVIDE PEAK 8880 29.3 15.0 195 37.6 25.4 148 OLD BATTLE 10000 56.8 36.6 155 61.4 41.6 148 SANDSTONE RS 8150 19.2 5.3 362 34.1 23.0 148 WHISKEY PARK 8950 -M 28.3 * 54.4 35.5 153 ----- ----- Basin wide percent of average 185 145 UPPER GREEN RIVER BIG SANDY OPENING 9080 17.9 10.5 170 20.6 16.9 122 BLIND BULL SUM 8650 45.6 26.0 175 31.1 26.2 119 EAST RIM DIVIDE 7930 13.8 10.6 130 18.4 14.6 126 ELKHART PARK G.S. 9400 17.9 10.6 169 18.6 17.0 109 GROS VENTRE SUMMIT 8750 20.8 11.0 189 22.1 16.1 137 GUNSIGHT PASS 9820 -M -M * 25.1 -M * KENDALL R.S. 7740 13.2 5.7 232 21.9 17.2 127 LOOMIS PARK 8240 23.8 11.2 213 28.8 20.8 138 NEW FORK LAKE 8340 13.3 5.3 251 15.4 14.2 108 POCKET CREEK 9360 16.6 -M * 19.3 -M * SNIDER BASIN 8060 20.8 9.3 224 24.5 19.2 128 SPRING CREEK DIVIDE 9000 44.7 26.2 171 41.7 31.2 134 TRIPLE PEAK 8500 41.3 19.4 213 44.7 29.9 149 ----- ----- Basin wide percent of average 187 129 LOWER GREEN RIVER HAMS FORK 7840 11.7 2.6 450 19.4 15.6 124 HEWINTA 9519 15.3 5.9 259 24.6 18.7 132 HICKERSON PARK 9145 1.4 3.1 45 14.4 11.0 131 HOLE-IN-ROCK 9150 6.4 2.5 256 16.2 10.6 153 INDIAN CREEK 9425 39.1 25.4 154 34.4 30.6 112 KELLEY R.S. 8180 23.1 10.7 216 30.5 24.5 124 STEEL CREEK PARK 10200 26.3 18.7 141 28.8 21.3 135 ----- ----- Basin wide percent of average 179 127 UPPER BEAR RIVER BUG LAKE 7950 34.7 13.1 265 36.9 23.4 158 HAYDEN FORK 9212 26.3 9.1 289 39.2 26.3 149 KELLEY R.S. 8180 23.1 10.7 216 30.5 24.5 124 LILY LAKE 9156 25.6 7.7 332 30.3 22.2 136 MONTE CRISTO 8960 48.2 24.6 196 47.5 31.7 150 SALT RIVER SUMMIT 7760 19.1 6.7 285 27.7 22.5 123 TRIAL LAKE 9992 50.0 24.6 203 44.0 30.8 143 ----- ----- Basin wide percent of average 235 141 ----------------------------------------------------------------------------- -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.