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 MONDAY: MAY 2 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 26.3 11.9 221 31.0 24.5 127 COTTONWOOD CREEK 7670 37.2 19.4 192 45.2 32.1 141 GRAND TARGHEE 9260 62.5 -M * 45.7 -M * GRANITE CREEK 6770 25.7 12.5 206 29.8 22.5 132 GRASSY LAKE 7265 49.5 33.0 150 51.5 41.0 126 GROS VENTRE SUMMIT 8750 18.6 13.1 142 19.1 15.3 125 GUNSIGHT PASS 9820 23.8 -M * 21.9 -M * LEWIS LAKE DIVIDE 7850 55.1 34.3 161 44.6 41.8 107 PHILLIPS BENCH 8200 40.4 29.2 138 41.7 33.2 126 SALT RIVER SUMMIT 7760 21.3 10.3 207 26.8 21.7 124 SNAKE RIVER STATION 6920 -M 11.8 * 33.1 25.6 129 SPRING CREEK DIVIDE 9000 44.4 28.4 156 40.4 30.3 133 THUMB DIVIDE 7980 29.3 14.6 201 26.9 22.1 122 TOGWOTEE PASS 9580 37.8 28.0 135 39.3 29.1 135 TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.2 * WILLOW CREEK 8380 48.6 30.4 160 52.7 37.9 139 ----- ----- Basin wide percent of average 164 128 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 33.3 25.9 129 32.1 23.6 136 BLACK BEAR 8170 57.6 39.8 145 55.7 46.0 121 CANYON 7870 21.7 11.0 197 23.4 17.8 131 FISHER CREEK 9100 51.4 37.7 136 48.7 42.1 116 MADISON PLATEAU 7750 38.0 24.0 158 39.7 30.5 130 NORTHEAST ENTRANCE 7350 17.2 6.7 257 19.6 14.9 132 PARKER PEAK 9400 38.3 24.5 156 32.5 19.6 166 SYLVAN LAKE 8420 33.2 23.5 141 36.7 24.8 148 THUMB DIVIDE 7980 29.3 14.6 201 26.9 22.1 122 TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.2 * WHISKEY CREEK 6800 24.7 14.9 166 29.3 24.3 121 WHITE MILL 8700 36.1 26.3 137 35.8 31.3 114 WOLVERINE 7650 17.3 6.9 251 18.5 15.3 121 ----- ----- Basin wide percent of average 156 128 WIND RIVER BURROUGHS CREEK 8750 20.7 13.4 154 21.6 19.4 111 CASTLE CREEK 8400 6.9 -M * 10.5 -M * COLD SPRINGS 9630 9.4 4.8 196 11.6 14.0 83 DEER PARK 9700 22.3 18.5 121 26.2 27.1 97 HOBBS PARK 10100 19.1 18.0 106 17.0 17.1 99 LITTLE WARM 9370 15.8 10.8 146 16.5 16.9 98 SOUTH PASS 9040 19.4 17.8 109 17.1 22.8 75 ST. LAWRENCE ALT 8620 3.4 6.0 57 9.8 12.2 80 TOGWOTEE PASS 9580 37.8 28.0 135 39.3 29.1 135 TOWNSEND CREEK 8700 9.3 8.8 106 13.6 15.6 87 ----- ----- Basin wide percent of average 125 99 BIGHORN BASIN BALD MTN. 9380 32.5 23.5 138 26.2 21.5 122 BEAR TRAP MEADOW 8200 11.6 2.3 504 12.5 11.0 114 BLACKWATER 9780 36.7 28.9 127 34.6 24.8 140 BONE SPRINGS DIV 9350 28.2 18.3 154 22.7 18.4 123 EVENING STAR 9200 41.7 33.3 125 43.4 30.0 145 GRAVE SPRINGS 8550 12.3 11.0 112 12.8 13.2 97 KIRWIN 9550 17.0 12.9 132 17.5 14.3 122 MARQUETTE 8760 7.1 -M * 10.1 13.8 73 MIDDLE POWDER 7760 14.9 14.2 105 14.4 15.9 91 OWL CREEK 8975 7.4 3.9 190 9.1 8.3 110 POWDER RIVER PASS 9480 20.9 10.5 199 24.1 15.9 152 SHELL CREEK 9580 24.5 16.8 146 22.1 16.9 131 SYLVAN LAKE 8420 33.2 23.5 141 36.7 24.8 148 SYLVAN ROAD 7120 17.9 7.8 229 27.0 20.6 131 TIMBER CREEK 7950 6.2 4.8 129 8.2 10.6 77 YOUNTS PEAK 8350 23.8 18.1 131 20.9 18.9 111 ----- ----- Basin wide percent of average 143 123 SHOSHONE RIVER BLACKWATER 9780 36.7 28.9 127 34.6 24.8 140 EVENING STAR 9200 41.7 33.3 125 43.4 30.0 145 KIRWIN 9550 17.0 12.9 132 17.5 14.3 122 MARQUETTE 8760 7.1 -M * 10.1 13.8 73 SYLVAN LAKE 8420 33.2 23.5 141 36.7 24.8 148 SYLVAN ROAD 7120 17.9 7.8 229 27.0 20.6 131 YOUNTS PEAK 8350 23.8 18.1 131 20.9 18.9 111 ----- ----- Basin wide percent of average 137 129 POWDER-TONGUE BEAR TRAP MEADOW 8200 11.6 2.3 504 12.5 11.0 114 BIG GOOSE 7990 13.4 11.5 117 15.5 13.0 119 BONE SPRINGS DIV 9350 28.2 18.3 154 22.7 18.4 123 BURGESS JUNCTION 7880 16.2 13.1 124 16.8 15.5 108 CLOUD PEAK RESERVOIR 9860 22.3 16.2 138 20.8 17.3 120 DOME LAKE 8880 19.6 13.3 147 19.1 16.9 113 GRAVE SPRINGS 8550 12.3 11.0 112 12.8 13.2 97 HANSEN SAWMILL 8360 10.5 4.7 223 12.0 11.1 108 LITTLE GOOSE 8870 15.8 -M * 19.9 -M * MIDDLE POWDER 7760 14.9 14.2 105 14.4 15.9 91 POWDER RIVER PASS 9480 20.9 10.5 199 24.1 15.9 152 SOLDIER PARK 8720 11.9 -M * 13.0 -M * SUCKER CREEK 8880 19.2 12.9 149 21.2 17.6 120 TIE CREEK 6870 9.2 3.9 236 14.8 13.6 109 ----- ----- Basin wide percent of average 150 115 BELLE FOURCHE BLIND PARK 6890 11.4 4.0 285 21.7 14.3 152 COLE CANYON 5910 9.3 4.5 207 16.6 9.6 173 NORTH RAPID CREEK 6130 6.3 3.4 185 17.2 11.5 150 ----- ----- Basin wide percent of average 227 157 UPPER N. PLATTE RIVER CINNABAR PARK 9574 30.5 15.8 193 36.9 23.7 156 COLUMBINE 9160 39.9 20.5 195 44.3 29.3 151 DIVIDE PEAK 8880 31.8 19.0 167 36.6 24.4 150 ELK RIVER 8700 30.5 14.5 210 34.1 23.2 147 JOE WRIGHT 10120 48.2 25.1 192 48.2 30.3 159 NORTH FRENCH CREEK 10130 -M 34.5 * 59.3 29.9 198 OLD BATTLE 10000 56.7 37.0 153 47.3 40.1 118 SAGE CREEK BASIN 7850 19.2 11.0 175 23.9 14.2 168 SOUTH BRUSH CREEK 8440 25.0 10.8 231 30.5 20.3 150 TOWER 10500 72.5 52.3 139 47.7 45.3 105 WEBBER SPRINGS 9250 39.5 24.8 159 46.1 31.3 147 WILLOW CREEK PASS 9540 27.1 14.1 192 24.9 15.8 158 ----- ----- Basin wide percent of average 172 146 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 42.0 28.1 149 38.0 27.1 140 CASPER MTN. 7900 13.6 16.9 80 18.5 19.7 94 DEADMAN HILL 10220 31.3 19.7 159 30.6 21.1 145 DEER PARK 9700 22.3 18.5 121 26.2 27.1 97 LAPRELE CREEK 8375 15.1 6.9 219 18.1 16.6 109 RENO HILL 8400 18.9 14.5 130 22.3 20.4 109 ROACH 9700 28.1 18.3 154 31.2 22.6 138 SAND LAKE 10050 49.5 37.0 134 -M 29.5 * SOUTH PASS 9040 19.4 17.8 109 17.1 22.8 75 WINDY PEAK 7900 9.7 4.7 206 16.6 13.6 122 ----- ----- Basin wide percent of average 137 114 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 4.3 * 21.6 18.7 116 DIVIDE PEAK 8880 31.8 19.0 167 36.6 24.4 150 OLD BATTLE 10000 56.7 37.0 153 47.3 40.1 118 SANDSTONE RS 8150 23.1 9.1 254 33.6 22.0 153 WHISKEY PARK 8950 -M 30.4 * 53.5 34.0 157 ----- ----- Basin wide percent of average 171 138 UPPER GREEN RIVER BIG SANDY OPENING 9080 19.6 13.2 148 19.7 16.0 123 BLIND BULL SUM 8650 43.7 27.7 158 28.7 25.3 113 EAST RIM DIVIDE 7930 17.1 13.0 132 16.7 14.0 119 ELKHART PARK G.S. 9400 17.8 12.6 141 17.5 16.1 109 GROS VENTRE SUMMIT 8750 18.6 13.1 142 19.1 15.3 125 GUNSIGHT PASS 9820 23.8 -M * 21.9 -M * KENDALL R.S. 7740 14.5 9.6 151 19.6 16.6 118 LOOMIS PARK 8240 25.3 14.0 181 26.6 20.0 133 NEW FORK LAKE 8340 15.2 8.2 185 14.0 13.5 104 POCKET CREEK 9360 17.1 -M * 18.6 -M * SNIDER BASIN 8060 24.4 12.4 197 23.1 18.6 124 SPRING CREEK DIVIDE 9000 44.4 28.4 156 40.4 30.3 133 TRIPLE PEAK 8500 42.2 23.4 180 42.9 28.8 149 ----- ----- Basin wide percent of average 161 125 LOWER GREEN RIVER HAMS FORK 7840 17.8 5.6 318 19.0 14.8 128 HEWINTA 9519 17.8 9.0 198 23.2 17.9 130 HICKERSON PARK 9145 4.9 5.4 91 13.0 10.3 126 HOLE-IN-ROCK 9150 9.5 4.5 211 14.8 9.8 151 INDIAN CREEK 9425 40.4 28.1 144 33.6 29.6 114 KELLEY R.S. 8180 26.4 13.8 191 29.7 23.7 125 STEEL CREEK PARK 10200 25.1 18.7 134 27.1 20.3 133 ----- ----- Basin wide percent of average 167 127 UPPER BEAR RIVER BUG LAKE 7950 36.8 17.6 209 36.3 22.5 161 HAYDEN FORK 9212 -M 12.6 * 38.0 25.3 150 KELLEY R.S. 8180 26.4 13.8 191 29.7 23.7 125 LILY LAKE 9156 27.5 10.8 255 29.0 21.2 137 MONTE CRISTO 8960 49.1 28.0 175 46.7 30.4 154 SALT RIVER SUMMIT 7760 21.3 10.3 207 26.8 21.7 124 TRIAL LAKE 9992 47.2 26.4 179 42.5 29.6 144 ----- ----- Basin wide percent of average 195 143 ----------------------------------------------------------------------------- -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.