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 TUESDAY: MAY 3 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 25.6 11.5 223 31.0 24.5 127 COTTONWOOD CREEK 7670 36.7 19.0 193 45.3 32.2 141 GRAND TARGHEE 9260 62.6 -M * 45.9 -M * GRANITE CREEK 6770 25.5 12.2 209 29.8 22.6 132 GRASSY LAKE 7265 49.5 32.6 152 51.6 41.2 125 GROS VENTRE SUMMIT 8750 18.4 12.9 143 19.2 15.4 125 GUNSIGHT PASS 9820 23.9 -M * 22.0 -M * LEWIS LAKE DIVIDE 7850 55.4 34.0 163 46.1 41.9 110 PHILLIPS BENCH 8200 40.5 28.9 140 41.8 33.4 125 SALT RIVER SUMMIT 7760 21.0 9.9 212 26.9 21.8 123 SNAKE RIVER STATION 6920 -M 11.4 * 33.1 25.7 129 SPRING CREEK DIVIDE 9000 44.5 28.3 157 40.4 30.4 133 THUMB DIVIDE 7980 29.1 14.3 203 27.0 22.2 122 TOGWOTEE PASS 9580 37.9 28.0 135 39.4 29.2 135 TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.4 * WILLOW CREEK 8380 49.4 30.1 164 52.7 38.0 139 ----- ----- Basin wide percent of average 166 128 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 33.5 26.0 129 32.1 23.8 135 BLACK BEAR 8170 57.6 39.5 146 55.7 46.2 121 CANYON 7870 21.4 10.7 200 23.6 17.9 132 FISHER CREEK 9100 51.4 37.7 136 48.7 42.2 115 MADISON PLATEAU 7750 38.0 23.7 160 39.7 30.6 130 NORTHEAST ENTRANCE 7350 17.0 6.3 270 19.7 15.0 131 PARKER PEAK 9400 38.3 24.6 156 32.5 19.7 165 SYLVAN LAKE 8420 33.1 23.4 141 36.7 25.0 147 THUMB DIVIDE 7980 29.1 14.3 203 27.0 22.2 122 TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.4 * WHISKEY CREEK 6800 24.6 14.5 170 29.3 24.4 120 WHITE MILL 8700 36.0 26.3 137 35.8 31.5 114 WOLVERINE 7650 17.2 6.6 261 18.6 15.4 121 ----- ----- Basin wide percent of average 157 127 WIND RIVER BURROUGHS CREEK 8750 20.7 13.2 157 21.8 19.5 112 CASTLE CREEK 8400 6.4 -M * 10.6 -M * COLD SPRINGS 9630 9.3 4.7 198 11.8 14.1 84 DEER PARK 9700 22.3 18.1 123 26.3 27.2 97 HOBBS PARK 10100 19.3 18.0 107 17.4 17.2 101 LITTLE WARM 9370 15.3 10.5 146 16.6 17.0 98 SOUTH PASS 9040 19.7 17.7 111 17.3 23.0 75 ST. LAWRENCE ALT 8620 3.7 5.8 64 9.9 12.3 80 TOGWOTEE PASS 9580 37.9 28.0 135 39.4 29.2 135 TOWNSEND CREEK 8700 9.2 8.6 107 13.8 15.8 87 ----- ----- Basin wide percent of average 126 99 BIGHORN BASIN BALD MTN. 9380 32.5 23.5 138 26.3 21.6 122 BEAR TRAP MEADOW 8200 11.5 2.1 548 12.7 11.1 114 BLACKWATER 9780 36.8 29.0 127 34.8 25.0 139 BONE SPRINGS DIV 9350 28.3 18.2 155 22.8 18.6 123 EVENING STAR 9200 41.8 33.3 126 43.4 30.2 144 GRAVE SPRINGS 8550 12.3 10.8 114 12.8 13.4 96 KIRWIN 9550 17.0 12.9 132 17.7 14.4 123 MARQUETTE 8760 7.4 -M * 10.4 14.0 74 MIDDLE POWDER 7760 14.9 14.0 106 14.6 16.0 91 OWL CREEK 8975 7.3 3.8 192 9.1 8.4 108 POWDER RIVER PASS 9480 20.8 10.2 204 24.2 16.1 150 SHELL CREEK 9580 24.6 16.7 147 22.1 17.1 129 SYLVAN LAKE 8420 33.1 23.4 141 36.7 25.0 147 SYLVAN ROAD 7120 17.0 7.6 224 27.0 20.7 130 TIMBER CREEK 7950 6.2 4.7 132 8.2 10.8 76 YOUNTS PEAK 8350 23.7 18.1 131 21.0 19.0 111 ----- ----- Basin wide percent of average 144 122 SHOSHONE RIVER BLACKWATER 9780 36.8 29.0 127 34.8 25.0 139 EVENING STAR 9200 41.8 33.3 126 43.4 30.2 144 KIRWIN 9550 17.0 12.9 132 17.7 14.4 123 MARQUETTE 8760 7.4 -M * 10.4 14.0 74 SYLVAN LAKE 8420 33.1 23.4 141 36.7 25.0 147 SYLVAN ROAD 7120 17.0 7.6 224 27.0 20.7 130 YOUNTS PEAK 8350 23.7 18.1 131 21.0 19.0 111 ----- ----- Basin wide percent of average 136 129 POWDER-TONGUE BEAR TRAP MEADOW 8200 11.5 2.1 548 12.7 11.1 114 BIG GOOSE 7990 13.4 11.3 119 15.5 13.2 117 BONE SPRINGS DIV 9350 28.3 18.2 155 22.8 18.6 123 BURGESS JUNCTION 7880 16.2 13.0 125 16.9 15.6 108 CLOUD PEAK RESERVOIR 9860 22.4 16.2 138 21.0 17.4 121 DOME LAKE 8880 19.7 13.1 150 19.2 17.1 112 GRAVE SPRINGS 8550 12.3 10.8 114 12.8 13.4 96 HANSEN SAWMILL 8360 10.7 4.6 233 12.1 11.2 108 LITTLE GOOSE 8870 15.8 -M * 20.0 -M * MIDDLE POWDER 7760 14.9 14.0 106 14.6 16.0 91 POWDER RIVER PASS 9480 20.8 10.2 204 24.2 16.1 150 SOLDIER PARK 8720 11.9 -M * 13.1 -M * SUCKER CREEK 8880 19.2 12.7 151 21.3 17.7 120 TIE CREEK 6870 9.1 3.8 239 14.8 13.8 107 ----- ----- Basin wide percent of average 153 115 BELLE FOURCHE BLIND PARK 6890 11.3 3.9 290 21.7 14.4 151 COLE CANYON 5910 9.3 4.1 227 16.6 9.8 169 NORTH RAPID CREEK 6130 6.4 3.1 206 17.2 11.6 148 ----- ----- Basin wide percent of average 243 155 UPPER N. PLATTE RIVER CINNABAR PARK 9574 30.4 15.6 195 36.9 23.9 154 COLUMBINE 9160 40.0 20.0 200 44.3 29.4 151 DIVIDE PEAK 8880 31.9 18.6 172 36.7 24.5 150 ELK RIVER 8700 30.5 14.0 218 34.1 23.3 146 JOE WRIGHT 10120 48.5 25.1 193 48.4 30.4 159 NORTH FRENCH CREEK 10130 62.8 34.5 182 -M 30.0 * OLD BATTLE 10000 57.2 37.1 154 47.3 40.2 118 SAGE CREEK BASIN 7850 18.7 10.8 173 24.0 14.2 169 SOUTH BRUSH CREEK 8440 25.1 10.5 239 30.5 20.4 150 TOWER 10500 72.7 52.4 139 -M 45.6 * WEBBER SPRINGS 9250 39.5 24.5 161 46.1 31.4 147 WILLOW CREEK PASS 9540 27.1 14.0 194 25.0 15.9 157 ----- ----- Basin wide percent of average 175 147 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 42.1 28.0 150 38.0 27.3 139 CASPER MTN. 7900 13.7 16.6 83 18.5 19.9 93 DEADMAN HILL 10220 31.4 19.7 159 30.6 21.2 144 DEER PARK 9700 22.3 18.1 123 26.3 27.2 97 LAPRELE CREEK 8375 15.7 6.6 238 18.1 16.7 108 RENO HILL 8400 19.0 14.2 134 22.4 20.6 109 ROACH 9700 28.2 18.1 156 31.3 22.7 138 SAND LAKE 10050 49.7 37.0 134 43.8 29.7 147 SOUTH PASS 9040 19.7 17.7 111 17.3 23.0 75 WINDY PEAK 7900 9.7 4.5 216 16.7 13.8 121 ----- ----- Basin wide percent of average 139 118 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 4.0 * 21.7 18.8 115 DIVIDE PEAK 8880 31.9 18.6 172 36.7 24.5 150 OLD BATTLE 10000 57.2 37.1 154 47.3 40.2 118 SANDSTONE RS 8150 23.1 8.7 266 33.6 22.1 152 WHISKEY PARK 8950 -M 30.3 * 53.5 34.2 156 ----- ----- Basin wide percent of average 174 138 UPPER GREEN RIVER BIG SANDY OPENING 9080 19.5 13.0 150 19.7 16.1 122 BLIND BULL SUM 8650 44.1 27.6 160 28.9 25.4 114 EAST RIM DIVIDE 7930 16.8 12.8 131 16.8 14.0 120 ELKHART PARK G.S. 9400 17.8 12.5 142 17.6 16.2 109 GROS VENTRE SUMMIT 8750 18.4 12.9 143 19.2 15.4 125 GUNSIGHT PASS 9820 23.9 -M * 22.0 -M * KENDALL R.S. 7740 14.0 9.2 152 19.7 16.7 118 LOOMIS PARK 8240 25.4 13.8 184 26.7 20.1 133 NEW FORK LAKE 8340 14.9 7.9 189 14.2 13.6 104 POCKET CREEK 9360 17.3 -M * 18.7 -M * SNIDER BASIN 8060 24.3 12.1 201 23.3 18.7 125 SPRING CREEK DIVIDE 9000 44.5 28.3 157 40.4 30.4 133 TRIPLE PEAK 8500 42.3 23.1 183 43.0 28.9 149 ----- ----- Basin wide percent of average 163 125 LOWER GREEN RIVER HAMS FORK 7840 17.5 5.3 330 19.1 14.9 128 HEWINTA 9519 18.0 8.6 209 23.2 18.0 129 HICKERSON PARK 9145 5.0 5.2 96 13.1 10.4 126 HOLE-IN-ROCK 9150 9.6 4.3 223 14.8 9.9 149 INDIAN CREEK 9425 40.4 27.9 145 33.7 29.7 113 KELLEY R.S. 8180 26.1 13.5 193 29.8 23.8 125 STEEL CREEK PARK 10200 25.2 18.8 134 27.1 20.5 132 ----- ----- Basin wide percent of average 170 126 UPPER BEAR RIVER BUG LAKE 7950 36.5 17.2 212 36.3 22.6 161 HAYDEN FORK 9212 -M 12.3 * 38.0 25.4 150 KELLEY R.S. 8180 26.1 13.5 193 29.8 23.8 125 LILY LAKE 9156 27.3 10.5 260 28.9 21.3 136 MONTE CRISTO 8960 49.0 27.7 177 46.8 30.6 153 SALT RIVER SUMMIT 7760 21.0 9.9 212 26.9 21.8 123 TRIAL LAKE 9992 47.5 26.3 181 42.6 29.7 143 ----- ----- Basin wide percent of average 197 142 ----------------------------------------------------------------------------- -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.