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 4 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 25.2 11.1 227 31.0 24.6 126 COTTONWOOD CREEK 7670 37.2 18.7 199 45.4 32.4 140 GRAND TARGHEE 9260 62.6 -M * 45.9 -M * GRANITE CREEK 6770 25.2 11.9 212 29.8 22.6 132 GRASSY LAKE 7265 49.7 32.2 154 51.6 41.3 125 GROS VENTRE SUMMIT 8750 18.4 12.7 145 19.3 15.5 125 GUNSIGHT PASS 9820 24.1 -M * 21.9 -M * LEWIS LAKE DIVIDE 7850 55.2 33.7 164 46.2 42.0 110 PHILLIPS BENCH 8200 40.6 28.6 142 41.9 33.5 125 SALT RIVER SUMMIT 7760 20.9 9.6 218 26.9 21.9 123 SNAKE RIVER STATION 6920 -M 10.9 * 33.1 25.8 128 SPRING CREEK DIVIDE 9000 44.5 28.1 158 40.5 30.5 133 THUMB DIVIDE 7980 28.8 13.9 207 27.0 22.3 121 TOGWOTEE PASS 9580 38.0 28.1 135 39.4 29.4 134 TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.5 * WILLOW CREEK 8380 48.8 29.8 164 52.8 38.2 138 ----- ----- Basin wide percent of average 167 128 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 33.4 26.0 128 32.1 23.9 134 BLACK BEAR 8170 57.1 39.4 145 55.7 46.3 120 CANYON 7870 21.4 10.4 206 23.6 18.0 131 FISHER CREEK 9100 51.5 37.7 137 48.8 42.4 115 MADISON PLATEAU 7750 37.8 23.4 162 39.7 30.8 129 NORTHEAST ENTRANCE 7350 16.4 6.1 269 19.7 15.1 130 PARKER PEAK 9400 38.3 24.5 156 32.5 19.9 163 SYLVAN LAKE 8420 33.0 23.2 142 36.7 25.1 146 THUMB DIVIDE 7980 28.8 13.9 207 27.0 22.3 121 TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.5 * WHISKEY CREEK 6800 24.6 14.1 174 29.3 24.5 120 WHITE MILL 8700 36.2 26.2 138 35.8 31.6 113 WOLVERINE 7650 16.8 6.3 267 18.6 15.5 120 ----- ----- Basin wide percent of average 157 127 WIND RIVER BURROUGHS CREEK 8750 20.7 12.9 160 21.8 19.6 111 CASTLE CREEK 8400 6.1 -M * 10.6 -M * COLD SPRINGS 9630 9.2 4.6 200 11.8 14.3 83 DEER PARK 9700 22.4 17.6 127 26.3 27.4 96 HOBBS PARK 10100 19.5 17.9 109 17.4 17.4 100 LITTLE WARM 9370 15.2 10.3 148 16.6 17.2 97 SOUTH PASS 9040 19.7 17.4 113 17.3 23.1 75 ST. LAWRENCE ALT 8620 2.9 5.6 52 9.9 12.5 79 TOGWOTEE PASS 9580 38.0 28.1 135 39.4 29.4 134 TOWNSEND CREEK 8700 9.2 8.3 111 13.8 15.9 87 ----- ----- Basin wide percent of average 128 99 BIGHORN BASIN BALD MTN. 9380 32.5 23.4 139 26.3 21.8 121 BEAR TRAP MEADOW 8200 11.5 2.0 575 12.7 11.2 113 BLACKWATER 9780 36.8 29.1 126 34.8 25.1 139 BONE SPRINGS DIV 9350 28.4 18.1 157 22.8 18.7 122 EVENING STAR 9200 41.5 33.2 125 44.5 30.4 146 GRAVE SPRINGS 8550 12.2 10.7 114 12.8 13.5 95 KIRWIN 9550 16.9 12.8 132 17.7 14.6 121 MARQUETTE 8760 7.3 -M * 10.4 14.1 74 MIDDLE POWDER 7760 14.8 13.8 107 14.6 16.2 90 OWL CREEK 8975 7.0 3.6 194 9.1 8.5 107 POWDER RIVER PASS 9480 20.8 10.1 206 24.2 16.2 149 SHELL CREEK 9580 24.6 16.6 148 22.1 17.2 128 SYLVAN LAKE 8420 33.0 23.2 142 36.7 25.1 146 SYLVAN ROAD 7120 16.3 7.3 223 27.0 20.8 130 TIMBER CREEK 7950 6.1 4.6 133 8.2 10.9 75 YOUNTS PEAK 8350 23.6 18.0 131 21.0 19.1 110 ----- ----- Basin wide percent of average 144 122 SHOSHONE RIVER BLACKWATER 9780 36.8 29.1 126 34.8 25.1 139 EVENING STAR 9200 41.5 33.2 125 44.5 30.4 146 KIRWIN 9550 16.9 12.8 132 17.7 14.6 121 MARQUETTE 8760 7.3 -M * 10.4 14.1 74 SYLVAN LAKE 8420 33.0 23.2 142 36.7 25.1 146 SYLVAN ROAD 7120 16.3 7.3 223 27.0 20.8 130 YOUNTS PEAK 8350 23.6 18.0 131 21.0 19.1 110 ----- ----- Basin wide percent of average 136 129 POWDER-TONGUE BEAR TRAP MEADOW 8200 11.5 2.0 575 12.7 11.2 113 BIG GOOSE 7990 13.4 11.1 121 15.5 13.4 116 BONE SPRINGS DIV 9350 28.4 18.1 157 22.8 18.7 122 BURGESS JUNCTION 7880 16.1 12.8 126 17.0 15.8 108 CLOUD PEAK RESERVOIR 9860 22.4 16.1 139 21.0 17.6 119 DOME LAKE 8880 19.6 12.9 152 19.2 17.2 112 GRAVE SPRINGS 8550 12.2 10.7 114 12.8 13.5 95 HANSEN SAWMILL 8360 10.6 4.4 241 12.1 11.3 107 LITTLE GOOSE 8870 15.7 -M * 20.0 -M * MIDDLE POWDER 7760 14.8 13.8 107 14.6 16.2 90 POWDER RIVER PASS 9480 20.8 10.1 206 24.2 16.2 149 SOLDIER PARK 8720 11.9 -M * 13.1 -M * SUCKER CREEK 8880 19.2 12.5 154 21.3 17.9 119 TIE CREEK 6870 9.0 3.6 250 14.8 13.9 106 ----- ----- Basin wide percent of average 155 114 BELLE FOURCHE BLIND PARK 6890 10.8 3.7 292 21.8 14.6 149 COLE CANYON 5910 9.0 3.6 250 16.6 9.9 168 NORTH RAPID CREEK 6130 5.7 2.7 211 17.3 11.7 148 ----- ----- Basin wide percent of average 255 154 UPPER N. PLATTE RIVER CINNABAR PARK 9574 30.2 15.3 197 37.0 24.0 154 COLUMBINE 9160 40.6 19.6 207 44.5 29.5 151 DIVIDE PEAK 8880 32.4 18.3 177 37.1 24.6 151 ELK RIVER 8700 30.4 13.5 225 34.4 23.4 147 JOE WRIGHT 10120 48.8 25.1 194 48.3 30.6 158 NORTH FRENCH CREEK 10130 63.3 34.5 183 -M 30.2 * OLD BATTLE 10000 57.8 37.2 155 47.3 40.4 117 SAGE CREEK BASIN 7850 17.6 10.6 166 24.2 14.3 169 SOUTH BRUSH CREEK 8440 25.4 10.2 249 31.0 20.5 151 TOWER 10500 73.0 52.4 139 -M 45.8 * WEBBER SPRINGS 9250 39.9 24.1 166 46.5 31.6 147 WILLOW CREEK PASS 9540 27.1 13.9 195 25.0 16.0 156 ----- ----- Basin wide percent of average 177 147 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 42.6 27.8 153 38.0 27.5 138 CASPER MTN. 7900 13.7 16.4 84 18.6 20.1 93 DEADMAN HILL 10220 31.6 19.7 160 30.8 21.4 144 DEER PARK 9700 22.4 17.6 127 26.3 27.4 96 LAPRELE CREEK 8375 14.4 6.4 225 18.2 16.9 108 RENO HILL 8400 18.7 13.9 135 22.5 20.8 108 ROACH 9700 28.2 17.9 158 31.4 22.9 137 SAND LAKE 10050 50.1 37.0 135 43.7 29.9 146 SOUTH PASS 9040 19.7 17.4 113 17.3 23.1 75 WINDY PEAK 7900 9.2 4.2 219 16.7 13.9 120 ----- ----- Basin wide percent of average 141 118 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 3.7 * 22.2 18.9 117 DIVIDE PEAK 8880 32.4 18.3 177 37.1 24.6 151 OLD BATTLE 10000 57.8 37.2 155 47.3 40.4 117 SANDSTONE RS 8150 23.3 8.3 281 34.0 22.2 153 WHISKEY PARK 8950 -M 30.1 * 54.0 34.4 157 ----- ----- Basin wide percent of average 178 139 UPPER GREEN RIVER BIG SANDY OPENING 9080 19.5 12.7 154 19.7 16.2 122 BLIND BULL SUM 8650 44.1 27.4 161 29.0 25.5 114 EAST RIM DIVIDE 7930 16.7 12.6 133 16.8 14.1 119 ELKHART PARK G.S. 9400 18.0 12.3 146 17.5 16.3 107 GROS VENTRE SUMMIT 8750 18.4 12.7 145 19.3 15.5 125 GUNSIGHT PASS 9820 24.1 -M * 21.9 -M * KENDALL R.S. 7740 13.9 8.8 158 19.6 16.8 117 LOOMIS PARK 8240 25.2 13.5 187 26.7 20.2 132 NEW FORK LAKE 8340 14.9 7.6 196 14.2 13.6 104 POCKET CREEK 9360 17.3 -M * 18.6 -M * SNIDER BASIN 8060 24.1 11.8 204 23.2 18.7 124 SPRING CREEK DIVIDE 9000 44.5 28.1 158 40.5 30.5 133 TRIPLE PEAK 8500 42.0 22.7 185 42.9 29.0 148 ----- ----- Basin wide percent of average 165 124 LOWER GREEN RIVER HAMS FORK 7840 17.3 5.0 346 19.1 15.0 127 HEWINTA 9519 18.3 8.3 220 23.5 18.1 130 HICKERSON PARK 9145 4.5 4.9 92 13.3 10.5 127 HOLE-IN-ROCK 9150 9.5 4.1 232 14.9 10.0 149 INDIAN CREEK 9425 40.4 27.6 146 33.7 29.8 113 KELLEY R.S. 8180 25.8 13.2 195 29.8 23.9 125 STEEL CREEK PARK 10200 25.4 18.9 134 27.4 20.6 133 ----- ----- Basin wide percent of average 172 126 UPPER BEAR RIVER BUG LAKE 7950 36.5 16.7 219 36.4 22.7 160 HAYDEN FORK 9212 -M 11.9 * 38.1 25.5 149 KELLEY R.S. 8180 25.8 13.2 195 29.8 23.9 125 LILY LAKE 9156 27.7 10.2 272 29.0 21.4 136 MONTE CRISTO 8960 49.0 27.4 179 46.8 30.7 152 SALT RIVER SUMMIT 7760 20.9 9.6 218 26.9 21.9 123 TRIAL LAKE 9992 47.7 26.2 182 42.7 29.8 143 ----- ----- Basin wide percent of average 201 142 ----------------------------------------------------------------------------- -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.