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 SATURDAY: MAY 7 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 23.5 10.0 235 31.0 24.9 124 COTTONWOOD CREEK 7670 36.0 17.5 206 45.4 32.8 138 GRAND TARGHEE 9260 62.8 -M * 46.1 -M * GRANITE CREEK 6770 24.1 10.8 223 29.9 22.9 131 GRASSY LAKE 7265 47.9 30.8 156 51.7 41.8 124 GROS VENTRE SUMMIT 8750 18.2 12.1 150 19.4 15.7 124 GUNSIGHT PASS 9820 24.0 -M * 22.1 -M * LEWIS LAKE DIVIDE 7850 55.2 32.6 169 46.4 42.4 109 PHILLIPS BENCH 8200 41.7 27.6 151 42.0 33.8 124 SALT RIVER SUMMIT 7760 19.6 8.4 233 26.9 22.1 122 SNAKE RIVER STATION 6920 -M 9.6 * 33.2 26.1 127 SPRING CREEK DIVIDE 9000 44.2 27.4 161 40.5 30.8 131 THUMB DIVIDE 7980 27.9 12.9 216 27.0 22.6 119 TOGWOTEE PASS 9580 37.9 28.1 135 39.6 29.8 133 TWO OCEAN PLATEAU 9240 -M 31.6 * -M 33.0 * WILLOW CREEK 8380 48.6 28.8 169 52.9 38.8 136 ----- ----- Basin wide percent of average 172 126 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 33.4 25.9 129 32.2 24.3 133 BLACK BEAR 8170 -M 38.8 * 55.8 46.8 119 CANYON 7870 20.6 9.5 217 23.6 18.2 130 FISHER CREEK 9100 51.3 37.7 136 50.2 42.9 117 MADISON PLATEAU 7750 37.2 22.4 166 39.8 31.1 128 NORTHEAST ENTRANCE 7350 14.6 5.6 261 19.7 15.3 129 PARKER PEAK 9400 38.3 24.5 156 -M 20.2 * SYLVAN LAKE 8420 32.7 22.6 145 36.8 25.5 144 THUMB DIVIDE 7980 27.9 12.9 216 27.0 22.6 119 TWO OCEAN PLATEAU 9240 -M 31.6 * -M 33.0 * WHISKEY CREEK 6800 23.8 13.1 182 29.2 24.8 118 WHITE MILL 8700 36.0 26.0 138 35.9 32.0 112 WOLVERINE 7650 15.8 5.7 277 18.8 15.8 119 ----- ----- Basin wide percent of average 161 123 WIND RIVER BURROUGHS CREEK 8750 20.3 12.0 169 21.8 20.0 109 CASTLE CREEK 8400 4.2 -M * 10.7 -M * COLD SPRINGS 9630 7.3 4.6 159 11.8 14.6 81 DEER PARK 9700 22.0 16.8 131 26.4 27.7 95 HOBBS PARK 10100 18.8 17.5 107 17.4 17.8 98 LITTLE WARM 9370 14.6 9.6 152 16.7 17.5 95 SOUTH PASS 9040 18.6 16.6 112 17.4 23.5 74 ST. LAWRENCE ALT 8620 1.2 5.2 23 9.9 12.8 77 TOGWOTEE PASS 9580 37.9 28.1 135 39.6 29.8 133 TOWNSEND CREEK 8700 8.4 7.6 111 13.8 16.3 85 ----- ----- Basin wide percent of average 126 97 BIGHORN BASIN BALD MTN. 9380 32.4 23.5 138 26.3 22.2 118 BEAR TRAP MEADOW 8200 10.6 1.7 624 12.7 11.6 109 BLACKWATER 9780 37.0 28.7 129 35.0 25.5 137 BONE SPRINGS DIV 9350 28.2 17.5 161 22.9 19.2 119 EVENING STAR 9200 41.4 33.3 124 44.5 30.8 144 GRAVE SPRINGS 8550 12.1 9.8 123 12.8 13.9 92 KIRWIN 9550 16.3 12.5 130 17.8 14.9 119 MARQUETTE 8760 7.4 -M * 10.4 14.6 71 MIDDLE POWDER 7760 14.7 13.1 112 14.6 16.5 88 OWL CREEK 8975 5.4 3.4 159 9.2 8.8 105 POWDER RIVER PASS 9480 20.6 9.5 217 24.2 16.6 146 SHELL CREEK 9580 24.3 16.8 145 22.1 17.6 126 SYLVAN LAKE 8420 32.7 22.6 145 36.8 25.5 144 SYLVAN ROAD 7120 13.2 6.0 220 27.0 21.1 128 TIMBER CREEK 7950 4.4 3.9 113 8.2 11.3 73 YOUNTS PEAK 8350 23.5 17.5 134 20.9 19.4 108 ----- ----- Basin wide percent of average 144 119 SHOSHONE RIVER BLACKWATER 9780 37.0 28.7 129 35.0 25.5 137 EVENING STAR 9200 41.4 33.3 124 44.5 30.8 144 KIRWIN 9550 16.3 12.5 130 17.8 14.9 119 MARQUETTE 8760 7.4 -M * 10.4 14.6 71 SYLVAN LAKE 8420 32.7 22.6 145 36.8 25.5 144 SYLVAN ROAD 7120 13.2 6.0 220 27.0 21.1 128 YOUNTS PEAK 8350 23.5 17.5 134 20.9 19.4 108 ----- ----- Basin wide percent of average 136 127 POWDER-TONGUE BEAR TRAP MEADOW 8200 10.6 1.7 624 12.7 11.6 109 BIG GOOSE 7990 13.0 10.6 123 15.6 13.8 113 BONE SPRINGS DIV 9350 28.2 17.5 161 22.9 19.2 119 BURGESS JUNCTION 7880 15.9 12.2 130 17.0 16.1 106 CLOUD PEAK RESERVOIR 9860 22.2 15.7 141 21.2 18.1 117 DOME LAKE 8880 19.5 12.1 161 19.3 17.7 109 GRAVE SPRINGS 8550 12.1 9.8 123 12.8 13.9 92 HANSEN SAWMILL 8360 10.1 3.9 259 12.1 11.6 104 LITTLE GOOSE 8870 15.5 -M * 20.0 -M * MIDDLE POWDER 7760 14.7 13.1 112 14.6 16.5 88 POWDER RIVER PASS 9480 20.6 9.5 217 24.2 16.6 146 SOLDIER PARK 8720 11.6 -M * 13.2 -M * SUCKER CREEK 8880 19.1 11.8 162 21.3 18.4 116 TIE CREEK 6870 8.1 2.8 289 14.8 14.3 103 ----- ----- Basin wide percent of average 161 111 BELLE FOURCHE BLIND PARK 6890 9.2 2.7 341 21.8 14.9 146 COLE CANYON 5910 7.8 2.5 312 16.7 10.3 162 NORTH RAPID CREEK 6130 3.9 1.9 205 17.3 12.0 144 ----- ----- Basin wide percent of average 294 150 UPPER N. PLATTE RIVER CINNABAR PARK 9574 31.4 14.5 217 42.6 24.4 175 COLUMBINE 9160 39.6 18.1 219 44.6 29.9 149 DIVIDE PEAK 8880 32.6 17.0 192 37.2 25.0 149 ELK RIVER 8700 29.2 12.0 243 34.4 23.7 145 JOE WRIGHT 10120 49.0 25.0 196 48.5 31.1 156 NORTH FRENCH CREEK 10130 63.9 34.4 186 59.8 30.8 194 OLD BATTLE 10000 57.6 37.2 155 47.5 40.9 116 SAGE CREEK BASIN 7850 15.0 9.9 152 24.2 14.5 167 SOUTH BRUSH CREEK 8440 24.1 9.3 259 30.9 20.9 148 TOWER 10500 73.6 52.4 140 -M 46.4 * WEBBER SPRINGS 9250 40.1 22.8 176 46.6 32.0 146 WILLOW CREEK PASS 9540 27.0 13.5 200 25.1 16.3 154 ----- ----- Basin wide percent of average 182 152 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 42.4 26.9 158 41.6 28.0 149 CASPER MTN. 7900 13.3 15.3 87 18.8 20.6 91 DEADMAN HILL 10220 31.7 19.5 163 31.1 21.8 143 DEER PARK 9700 22.0 16.8 131 26.4 27.7 95 LAPRELE CREEK 8375 13.5 5.6 241 18.3 17.3 106 RENO HILL 8400 18.4 12.9 143 22.9 21.3 108 ROACH 9700 28.5 16.9 169 31.6 23.3 136 SAND LAKE 10050 50.4 36.9 137 43.8 30.5 144 SOUTH PASS 9040 18.6 16.6 112 17.4 23.5 74 WINDY PEAK 7900 8.6 3.5 246 17.1 14.2 120 ----- ----- Basin wide percent of average 145 118 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 2.9 * 22.3 19.1 117 DIVIDE PEAK 8880 32.6 17.0 192 37.2 25.0 149 OLD BATTLE 10000 57.6 37.2 155 47.5 40.9 116 SANDSTONE RS 8150 22.4 7.0 320 34.0 22.6 150 WHISKEY PARK 8950 -M 29.5 * 54.0 34.9 155 ----- ----- Basin wide percent of average 184 137 UPPER GREEN RIVER BIG SANDY OPENING 9080 17.8 11.9 150 19.9 16.5 121 BLIND BULL SUM 8650 44.3 26.9 165 29.0 25.8 112 EAST RIM DIVIDE 7930 14.3 11.8 121 16.9 14.3 118 ELKHART PARK G.S. 9400 17.4 11.6 150 17.6 16.6 106 GROS VENTRE SUMMIT 8750 18.2 12.1 150 19.4 15.7 124 GUNSIGHT PASS 9820 24.0 -M * 22.1 -M * KENDALL R.S. 7740 12.7 7.6 167 19.7 17.0 116 LOOMIS PARK 8240 23.6 12.5 189 26.8 20.5 131 NEW FORK LAKE 8340 13.3 6.6 202 14.3 13.9 103 POCKET CREEK 9360 16.9 -M * 18.7 -M * SNIDER BASIN 8060 21.9 10.8 203 23.3 18.9 123 SPRING CREEK DIVIDE 9000 44.2 27.4 161 40.5 30.8 131 TRIPLE PEAK 8500 41.3 21.4 193 43.0 29.4 146 ----- ----- Basin wide percent of average 167 123 LOWER GREEN RIVER HAMS FORK 7840 14.2 4.0 355 19.2 15.3 125 HEWINTA 9519 16.6 7.3 227 23.5 18.4 128 HICKERSON PARK 9145 2.4 4.1 59 13.3 10.7 124 HOLE-IN-ROCK 9150 7.9 3.4 232 15.0 10.2 147 INDIAN CREEK 9425 40.2 26.7 151 33.8 30.1 112 KELLEY R.S. 8180 24.2 12.2 198 29.9 24.1 124 STEEL CREEK PARK 10200 25.4 18.9 134 27.3 20.9 131 ----- ----- Basin wide percent of average 171 125 UPPER BEAR RIVER BUG LAKE 7950 36.3 15.2 239 36.4 23.0 158 HAYDEN FORK 9212 28.5 10.7 266 38.1 25.9 147 KELLEY R.S. 8180 24.2 12.2 198 29.9 24.1 124 LILY LAKE 9156 26.8 9.2 291 29.1 21.8 133 MONTE CRISTO 8960 49.9 26.3 190 47.0 31.2 151 SALT RIVER SUMMIT 7760 19.6 8.4 233 26.9 22.1 122 TRIAL LAKE 9992 -M 25.7 * 42.7 30.3 141 ----- ----- Basin wide percent of average 226 140 ----------------------------------------------------------------------------- -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.