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 SUNDAY: MAY 8 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 23.0 9.6 240 31.5 25.0 126 COTTONWOOD CREEK 7670 35.7 17.1 209 45.6 32.9 139 GRAND TARGHEE 9260 63.7 -M * 46.1 -M * GRANITE CREEK 6770 23.9 10.5 228 31.2 23.0 136 GRASSY LAKE 7265 46.5 30.3 153 52.9 41.9 126 GROS VENTRE SUMMIT 8750 18.5 11.8 157 19.9 15.8 126 GUNSIGHT PASS 9820 -M -M * 22.7 -M * LEWIS LAKE DIVIDE 7850 56.9 32.2 177 47.7 42.6 112 PHILLIPS BENCH 8200 43.2 27.2 159 43.2 34.0 127 SALT RIVER SUMMIT 7760 18.9 8.0 236 27.0 22.2 122 SNAKE RIVER STATION 6920 -M 9.1 * 34.1 26.2 130 SPRING CREEK DIVIDE 9000 45.1 27.2 166 40.6 30.9 131 THUMB DIVIDE 7980 27.9 12.5 223 27.5 22.7 121 TOGWOTEE PASS 9580 38.8 28.1 138 40.1 29.9 134 TWO OCEAN PLATEAU 9240 -M 31.5 * -M 33.1 * WILLOW CREEK 8380 48.4 28.5 170 53.5 39.0 137 ----- ----- Basin wide percent of average 176 128 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 33.9 25.9 131 32.8 24.4 134 BLACK BEAR 8170 -M 38.5 * 57.1 47.0 121 CANYON 7870 20.8 9.1 229 23.9 18.3 131 FISHER CREEK 9100 52.7 37.7 140 51.1 43.0 119 MADISON PLATEAU 7750 36.6 22.2 165 40.3 31.2 129 NORTHEAST ENTRANCE 7350 14.1 5.4 261 20.5 15.4 133 PARKER PEAK 9400 38.9 24.5 159 -M 20.4 * SYLVAN LAKE 8420 33.0 22.3 148 37.4 25.7 146 THUMB DIVIDE 7980 27.9 12.5 223 27.5 22.7 121 TWO OCEAN PLATEAU 9240 -M 31.5 * -M 33.1 * WHISKEY CREEK 6800 23.1 12.7 182 29.8 24.9 120 WHITE MILL 8700 37.5 25.9 145 37.1 32.2 115 WOLVERINE 7650 15.4 5.4 285 19.1 15.9 120 ----- ----- Basin wide percent of average 164 125 WIND RIVER BURROUGHS CREEK 8750 21.2 11.8 180 22.8 20.1 113 CASTLE CREEK 8400 3.4 -M * 10.9 -M * COLD SPRINGS 9630 6.7 4.4 152 11.8 14.8 80 DEER PARK 9700 21.7 16.5 132 26.4 27.8 95 HOBBS PARK 10100 18.2 17.4 105 17.4 18.0 97 LITTLE WARM 9370 14.9 9.3 160 16.9 17.7 95 SOUTH PASS 9040 17.8 16.3 109 17.4 23.7 73 ST. LAWRENCE ALT 8620 .6 5.1 12 10.0 12.9 78 TOGWOTEE PASS 9580 38.8 28.1 138 40.1 29.9 134 TOWNSEND CREEK 8700 7.2 7.4 97 13.8 16.4 84 ----- ----- Basin wide percent of average 126 97 BIGHORN BASIN BALD MTN. 9380 32.5 23.5 138 26.3 22.4 117 BEAR TRAP MEADOW 8200 9.9 1.6 619 12.7 11.7 109 BLACKWATER 9780 37.4 28.7 130 35.3 25.7 137 BONE SPRINGS DIV 9350 28.2 17.4 162 23.1 19.3 120 EVENING STAR 9200 41.9 33.3 126 44.8 31.0 145 GRAVE SPRINGS 8550 11.7 9.6 122 12.8 14.0 91 KIRWIN 9550 16.4 12.4 132 18.0 15.0 120 MARQUETTE 8760 6.8 -M * 10.4 14.8 70 MIDDLE POWDER 7760 14.4 12.8 113 14.6 16.7 87 OWL CREEK 8975 4.1 3.3 124 9.2 8.9 103 POWDER RIVER PASS 9480 20.4 9.4 217 24.3 16.7 146 SHELL CREEK 9580 24.3 16.9 144 22.0 17.8 124 SYLVAN LAKE 8420 33.0 22.3 148 37.4 25.7 146 SYLVAN ROAD 7120 12.4 5.6 221 27.5 21.2 130 TIMBER CREEK 7950 3.2 3.6 89 8.2 11.5 71 YOUNTS PEAK 8350 23.2 17.2 135 21.6 19.5 111 ----- ----- Basin wide percent of average 144 119 SHOSHONE RIVER BLACKWATER 9780 37.4 28.7 130 35.3 25.7 137 EVENING STAR 9200 41.9 33.3 126 44.8 31.0 145 KIRWIN 9550 16.4 12.4 132 18.0 15.0 120 MARQUETTE 8760 6.8 -M * 10.4 14.8 70 SYLVAN LAKE 8420 33.0 22.3 148 37.4 25.7 146 SYLVAN ROAD 7120 12.4 5.6 221 27.5 21.2 130 YOUNTS PEAK 8350 23.2 17.2 135 21.6 19.5 111 ----- ----- Basin wide percent of average 137 128 POWDER-TONGUE BEAR TRAP MEADOW 8200 9.9 1.6 619 12.7 11.7 109 BIG GOOSE 7990 12.8 10.4 123 15.7 13.9 113 BONE SPRINGS DIV 9350 28.2 17.4 162 23.1 19.3 120 BURGESS JUNCTION 7880 15.8 12.0 132 17.1 16.3 105 CLOUD PEAK RESERVOIR 9860 21.9 15.6 140 21.3 18.3 116 DOME LAKE 8880 19.1 12.0 159 19.3 17.8 108 GRAVE SPRINGS 8550 11.7 9.6 122 12.8 14.0 91 HANSEN SAWMILL 8360 9.4 3.7 254 12.2 11.7 104 LITTLE GOOSE 8870 15.3 -M * 20.1 -M * MIDDLE POWDER 7760 14.4 12.8 113 14.6 16.7 87 POWDER RIVER PASS 9480 20.4 9.4 217 24.3 16.7 146 SOLDIER PARK 8720 11.2 -M * 13.3 -M * SUCKER CREEK 8880 18.9 11.7 162 21.3 18.5 115 TIE CREEK 6870 7.7 2.6 296 15.0 14.5 103 ----- ----- Basin wide percent of average 160 111 BELLE FOURCHE BLIND PARK 6890 8.3 2.3 361 21.8 15.0 145 COLE CANYON 5910 6.9 2.2 314 16.7 10.4 161 NORTH RAPID CREEK 6130 3.2 1.7 188 17.3 12.1 143 ----- ----- Basin wide percent of average 297 149 UPPER N. PLATTE RIVER CINNABAR PARK 9574 32.4 14.1 230 42.6 24.5 174 COLUMBINE 9160 38.8 17.5 222 44.6 30.0 149 DIVIDE PEAK 8880 32.2 16.5 195 37.2 25.1 148 ELK RIVER 8700 28.0 11.4 246 34.4 23.8 145 JOE WRIGHT 10120 48.7 24.9 196 48.5 31.3 155 NORTH FRENCH CREEK 10130 63.3 34.4 184 61.6 30.9 199 OLD BATTLE 10000 57.5 37.1 155 -M 41.1 * SAGE CREEK BASIN 7850 13.5 9.6 141 24.2 14.6 166 SOUTH BRUSH CREEK 8440 22.7 9.0 252 31.0 21.1 147 TOWER 10500 73.5 52.4 140 -M 46.6 * WEBBER SPRINGS 9250 39.5 22.3 177 46.5 32.1 145 WILLOW CREEK PASS 9540 26.7 13.3 201 25.1 16.4 153 ----- ----- Basin wide percent of average 182 158 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 42.0 26.5 158 41.7 28.1 148 CASPER MTN. 7900 12.4 15.0 83 18.8 20.7 91 DEADMAN HILL 10220 31.2 19.4 161 31.1 22.0 141 DEER PARK 9700 21.7 16.5 132 26.4 27.8 95 LAPRELE CREEK 8375 12.6 5.3 238 18.3 17.4 105 RENO HILL 8400 17.7 12.5 142 22.9 21.4 107 ROACH 9700 28.0 16.5 170 31.6 23.4 135 SAND LAKE 10050 50.1 36.8 136 47.9 30.6 157 SOUTH PASS 9040 17.8 16.3 109 17.4 23.7 73 WINDY PEAK 7900 7.7 3.2 241 17.1 14.4 119 ----- ----- Basin wide percent of average 144 119 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 2.6 * 22.3 19.2 116 DIVIDE PEAK 8880 32.2 16.5 195 37.2 25.1 148 OLD BATTLE 10000 57.5 37.1 155 -M 41.1 * SANDSTONE RS 8150 22.7 6.6 344 34.0 22.7 150 WHISKEY PARK 8950 -M 29.2 * 54.0 35.0 154 ----- ----- Basin wide percent of average 187 145 UPPER GREEN RIVER BIG SANDY OPENING 9080 17.7 11.5 154 19.9 16.6 120 BLIND BULL SUM 8650 45.3 26.7 170 29.9 25.9 115 EAST RIM DIVIDE 7930 13.4 11.5 117 17.3 14.4 120 ELKHART PARK G.S. 9400 17.5 11.4 154 17.8 16.7 107 GROS VENTRE SUMMIT 8750 18.5 11.8 157 19.9 15.8 126 GUNSIGHT PASS 9820 -M -M * 22.7 -M * KENDALL R.S. 7740 12.4 7.1 175 20.2 17.0 119 LOOMIS PARK 8240 23.2 12.2 190 27.2 20.5 133 NEW FORK LAKE 8340 13.0 6.3 206 14.4 14.0 103 POCKET CREEK 9360 -M -M * 18.7 -M * SNIDER BASIN 8060 20.5 10.5 195 23.4 19.0 123 SPRING CREEK DIVIDE 9000 45.1 27.2 166 40.6 30.9 131 TRIPLE PEAK 8500 41.0 20.9 196 43.4 29.5 147 ----- ----- Basin wide percent of average 170 124 LOWER GREEN RIVER HAMS FORK 7840 13.0 3.6 361 19.3 15.4 125 HEWINTA 9519 15.0 6.9 217 23.6 18.5 128 HICKERSON PARK 9145 1.4 3.9 36 13.3 10.8 123 HOLE-IN-ROCK 9150 6.6 3.2 206 15.0 10.3 146 INDIAN CREEK 9425 39.8 26.4 151 33.8 30.2 112 KELLEY R.S. 8180 23.4 11.8 198 29.9 24.2 124 STEEL CREEK PARK 10200 25.6 18.9 135 27.3 21.0 130 ----- ----- Basin wide percent of average 167 124 UPPER BEAR RIVER BUG LAKE 7950 35.7 14.7 243 36.4 23.1 158 HAYDEN FORK 9212 26.8 10.3 260 38.1 26.0 147 KELLEY R.S. 8180 23.4 11.8 198 29.9 24.2 124 LILY LAKE 9156 25.6 8.8 291 29.0 21.9 132 MONTE CRISTO 8960 49.4 25.9 191 47.0 31.3 150 SALT RIVER SUMMIT 7760 18.9 8.0 236 27.0 22.2 122 TRIAL LAKE 9992 -M 25.4 * 42.7 30.4 140 ----- ----- 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.