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 FRIDAY: MAY 6 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 24.2 10.4 233 31.0 24.8 125 COTTONWOOD CREEK 7670 36.6 17.9 204 45.4 32.6 139 GRAND TARGHEE 9260 62.8 -M * 46.1 -M * GRANITE CREEK 6770 24.5 11.2 219 29.8 22.8 131 GRASSY LAKE 7265 48.8 31.3 156 51.6 41.6 124 GROS VENTRE SUMMIT 8750 18.2 12.3 148 19.3 15.7 123 GUNSIGHT PASS 9820 24.0 -M * 22.1 -M * LEWIS LAKE DIVIDE 7850 55.5 33.0 168 46.4 42.3 110 PHILLIPS BENCH 8200 40.7 28.0 145 41.9 33.7 124 SALT RIVER SUMMIT 7760 20.3 8.8 231 26.9 22.0 122 SNAKE RIVER STATION 6920 -M 10.1 * 33.1 26.0 127 SPRING CREEK DIVIDE 9000 44.4 27.7 160 40.5 30.7 132 THUMB DIVIDE 7980 28.3 13.2 214 27.0 22.5 120 TOGWOTEE PASS 9580 37.9 28.1 135 39.5 29.6 133 TWO OCEAN PLATEAU 9240 -M 31.7 * -M 32.8 * WILLOW CREEK 8380 49.2 29.2 168 52.9 38.6 137 ----- ----- Basin wide percent of average 171 127 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 33.4 25.8 129 32.1 24.1 133 BLACK BEAR 8170 55.5 39.0 142 55.8 46.6 120 CANYON 7870 20.9 9.8 213 23.6 18.2 130 FISHER CREEK 9100 51.4 37.7 136 50.0 42.7 117 MADISON PLATEAU 7750 37.6 22.7 166 39.8 31.0 128 NORTHEAST ENTRANCE 7350 15.4 5.7 270 19.7 15.2 130 PARKER PEAK 9400 38.4 24.4 157 32.5 20.1 162 SYLVAN LAKE 8420 32.9 22.7 145 36.8 25.4 145 THUMB DIVIDE 7980 28.3 13.2 214 27.0 22.5 120 TWO OCEAN PLATEAU 9240 -M 31.7 * -M 32.8 * WHISKEY CREEK 6800 24.3 13.4 181 29.3 24.7 119 WHITE MILL 8700 36.0 26.0 138 35.9 31.9 113 WOLVERINE 7650 16.1 5.9 273 18.8 15.7 120 ----- ----- Basin wide percent of average 158 126 WIND RIVER BURROUGHS CREEK 8750 20.5 12.3 167 21.9 19.9 110 CASTLE CREEK 8400 5.0 -M * 10.8 -M * COLD SPRINGS 9630 8.2 4.6 178 11.8 14.5 81 DEER PARK 9700 22.2 16.7 133 26.4 27.6 96 HOBBS PARK 10100 19.1 17.6 109 17.4 17.7 98 LITTLE WARM 9370 14.7 9.8 150 16.7 17.4 96 SOUTH PASS 9040 19.0 16.9 112 17.4 23.4 74 ST. LAWRENCE ALT 8620 2.0 5.3 38 9.8 12.7 77 TOGWOTEE PASS 9580 37.9 28.1 135 39.5 29.6 133 TOWNSEND CREEK 8700 8.9 7.8 114 13.8 16.2 85 ----- ----- Basin wide percent of average 128 98 BIGHORN BASIN BALD MTN. 9380 32.4 23.4 138 26.3 22.1 119 BEAR TRAP MEADOW 8200 11.1 1.8 617 12.7 11.5 110 BLACKWATER 9780 36.9 28.7 129 34.9 25.4 137 BONE SPRINGS DIV 9350 28.3 17.6 161 23.0 19.0 121 EVENING STAR 9200 41.6 33.2 125 44.5 30.7 145 GRAVE SPRINGS 8550 12.2 10.1 121 12.8 13.8 93 KIRWIN 9550 16.5 12.6 131 17.8 14.8 120 MARQUETTE 8760 7.4 -M * 10.4 14.4 72 MIDDLE POWDER 7760 14.8 13.3 111 14.6 16.4 89 OWL CREEK 8975 6.0 3.5 171 9.2 8.7 106 POWDER RIVER PASS 9480 20.7 9.6 216 24.3 16.5 147 SHELL CREEK 9580 24.5 16.7 147 22.1 17.5 126 SYLVAN LAKE 8420 32.9 22.7 145 36.8 25.4 145 SYLVAN ROAD 7120 14.2 6.5 218 27.0 21.0 129 TIMBER CREEK 7950 4.9 4.2 117 8.2 11.2 73 YOUNTS PEAK 8350 23.6 17.6 134 21.0 19.3 109 ----- ----- Basin wide percent of average 145 120 SHOSHONE RIVER BLACKWATER 9780 36.9 28.7 129 34.9 25.4 137 EVENING STAR 9200 41.6 33.2 125 44.5 30.7 145 KIRWIN 9550 16.5 12.6 131 17.8 14.8 120 MARQUETTE 8760 7.4 -M * 10.4 14.4 72 SYLVAN LAKE 8420 32.9 22.7 145 36.8 25.4 145 SYLVAN ROAD 7120 14.2 6.5 218 27.0 21.0 129 YOUNTS PEAK 8350 23.6 17.6 134 21.0 19.3 109 ----- ----- Basin wide percent of average 137 127 POWDER-TONGUE BEAR TRAP MEADOW 8200 11.1 1.8 617 12.7 11.5 110 BIG GOOSE 7990 13.2 10.8 122 15.6 13.6 115 BONE SPRINGS DIV 9350 28.3 17.6 161 23.0 19.0 121 BURGESS JUNCTION 7880 16.1 12.3 131 17.1 16.0 107 CLOUD PEAK RESERVOIR 9860 22.2 15.8 141 21.1 17.9 118 DOME LAKE 8880 19.5 12.4 157 19.2 17.5 110 GRAVE SPRINGS 8550 12.2 10.1 121 12.8 13.8 93 HANSEN SAWMILL 8360 10.4 4.1 254 12.1 11.5 105 LITTLE GOOSE 8870 15.7 -M * 20.0 -M * MIDDLE POWDER 7760 14.8 13.3 111 14.6 16.4 89 POWDER RIVER PASS 9480 20.7 9.6 216 24.3 16.5 147 SOLDIER PARK 8720 11.8 -M * 13.2 -M * SUCKER CREEK 8880 19.1 11.9 161 21.3 18.2 117 TIE CREEK 6870 8.5 3.2 266 14.9 14.2 105 ----- ----- Basin wide percent of average 160 112 BELLE FOURCHE BLIND PARK 6890 10.0 3.0 333 21.8 14.8 147 COLE CANYON 5910 8.5 2.8 304 16.7 10.2 164 NORTH RAPID CREEK 6130 4.7 2.1 224 17.2 11.9 145 ----- ----- Basin wide percent of average 294 151 UPPER N. PLATTE RIVER CINNABAR PARK 9574 30.7 14.8 207 42.6 24.3 175 COLUMBINE 9160 -M 18.6 * 44.5 29.8 149 DIVIDE PEAK 8880 32.9 17.4 189 37.1 24.9 149 ELK RIVER 8700 30.3 12.5 242 34.4 23.6 146 JOE WRIGHT 10120 49.1 25.0 196 48.5 31.0 156 NORTH FRENCH CREEK 10130 64.3 34.5 186 -M 30.6 * OLD BATTLE 10000 58.2 37.3 156 47.4 40.7 116 SAGE CREEK BASIN 7850 16.1 10.1 159 24.2 14.4 168 SOUTH BRUSH CREEK 8440 24.7 9.6 257 31.0 20.8 149 TOWER 10500 73.9 52.4 141 -M 46.2 * WEBBER SPRINGS 9250 40.0 23.3 172 46.6 31.8 147 WILLOW CREEK PASS 9540 27.0 13.7 197 25.1 16.2 155 ----- ----- Basin wide percent of average 178 148 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 42.7 27.2 157 38.2 27.8 137 CASPER MTN. 7900 13.9 15.7 89 18.8 20.4 92 DEADMAN HILL 10220 31.9 19.6 163 31.1 21.7 143 DEER PARK 9700 22.2 16.7 133 26.4 27.6 96 LAPRELE CREEK 8375 14.1 5.9 239 18.3 17.1 107 RENO HILL 8400 18.8 13.3 141 22.9 21.1 109 ROACH 9700 28.7 17.3 166 31.7 23.2 137 SAND LAKE 10050 50.3 37.0 136 43.9 30.3 145 SOUTH PASS 9040 19.0 16.9 112 17.4 23.4 74 WINDY PEAK 7900 9.1 3.7 246 17.1 14.1 121 ----- ----- Basin wide percent of average 145 117 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 3.2 * 22.2 19.1 116 DIVIDE PEAK 8880 32.9 17.4 189 37.1 24.9 149 OLD BATTLE 10000 58.2 37.3 156 47.4 40.7 116 SANDSTONE RS 8150 22.9 7.5 305 34.0 22.4 152 WHISKEY PARK 8950 -M 29.7 * 54.0 34.7 156 ----- ----- Basin wide percent of average 183 137 UPPER GREEN RIVER BIG SANDY OPENING 9080 18.4 12.2 151 19.8 16.4 121 BLIND BULL SUM 8650 44.2 27.1 163 29.0 25.7 113 EAST RIM DIVIDE 7930 15.3 12.1 126 16.8 14.2 118 ELKHART PARK G.S. 9400 17.5 11.8 148 17.6 16.5 107 GROS VENTRE SUMMIT 8750 18.2 12.3 148 19.3 15.7 123 GUNSIGHT PASS 9820 24.0 -M * 22.1 -M * KENDALL R.S. 7740 13.1 8.0 164 19.7 16.9 117 LOOMIS PARK 8240 24.3 12.9 188 26.8 20.4 131 NEW FORK LAKE 8340 14.0 7.0 200 14.3 13.8 104 POCKET CREEK 9360 17.3 -M * 18.7 -M * SNIDER BASIN 8060 23.0 11.2 205 23.3 18.9 123 SPRING CREEK DIVIDE 9000 44.4 27.7 160 40.5 30.7 132 TRIPLE PEAK 8500 41.9 21.9 191 43.0 29.3 147 ----- ----- Basin wide percent of average 167 124 LOWER GREEN RIVER HAMS FORK 7840 15.7 4.3 365 19.2 15.2 126 HEWINTA 9519 17.8 7.6 234 23.5 18.3 128 HICKERSON PARK 9145 3.4 4.4 77 13.3 10.6 125 HOLE-IN-ROCK 9150 8.7 3.6 242 15.0 10.2 147 INDIAN CREEK 9425 40.4 27.1 149 33.8 30.0 113 KELLEY R.S. 8180 25.0 12.5 200 29.9 24.0 125 STEEL CREEK PARK 10200 25.5 18.9 135 27.4 20.8 132 ----- ----- Basin wide percent of average 174 126 UPPER BEAR RIVER BUG LAKE 7950 36.0 15.7 229 36.4 22.9 159 HAYDEN FORK 9212 29.8 11.1 268 38.1 25.7 148 KELLEY R.S. 8180 25.0 12.5 200 29.9 24.0 125 LILY LAKE 9156 27.4 9.5 288 29.1 21.6 135 MONTE CRISTO 8960 50.0 26.6 188 47.0 31.0 152 SALT RIVER SUMMIT 7760 20.3 8.8 231 26.9 22.0 122 TRIAL LAKE 9992 -M 25.9 * 42.7 30.1 142 ----- ----- Basin wide percent of average 224 141 ----------------------------------------------------------------------------- -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.