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 1 , 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 12.3 214 31.0 24.4 127 COTTONWOOD CREEK 7670 37.3 19.8 188 45.2 31.9 142 GRAND TARGHEE 9260 62.4 -M * 45.3 -M * GRANITE CREEK 6770 25.8 12.8 202 29.8 22.4 133 GRASSY LAKE 7265 49.4 33.4 148 51.5 40.9 126 GROS VENTRE SUMMIT 8750 18.7 13.3 141 19.1 15.3 125 GUNSIGHT PASS 9820 23.8 -M * 21.9 -M * LEWIS LAKE DIVIDE 7850 55.1 34.6 159 44.5 41.6 107 PHILLIPS BENCH 8200 40.4 29.4 137 41.7 33.1 126 SALT RIVER SUMMIT 7760 21.1 10.6 199 26.8 21.6 124 SNAKE RIVER STATION 6920 -M 12.2 * 33.1 25.5 130 SPRING CREEK DIVIDE 9000 44.5 28.6 156 40.4 30.2 134 THUMB DIVIDE 7980 29.4 14.9 197 26.9 22.0 122 TOGWOTEE PASS 9580 37.8 27.9 135 39.3 29.0 136 TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.1 * WILLOW CREEK 8380 48.7 30.6 159 52.7 37.7 140 ----- ----- Basin wide percent of average 162 128 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 33.3 25.9 129 31.9 23.5 136 BLACK BEAR 8170 57.9 39.9 145 54.6 45.8 119 CANYON 7870 21.7 11.3 192 23.3 17.7 132 FISHER CREEK 9100 51.4 37.8 136 -M 41.9 * MADISON PLATEAU 7750 38.0 24.2 157 39.6 30.4 130 NORTHEAST ENTRANCE 7350 17.2 7.1 242 19.6 14.8 132 PARKER PEAK 9400 38.3 24.5 156 -M 19.5 * SYLVAN LAKE 8420 33.2 23.8 139 36.6 24.7 148 THUMB DIVIDE 7980 29.4 14.9 197 26.9 22.0 122 TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.1 * WHISKEY CREEK 6800 24.7 15.2 163 29.3 24.2 121 WHITE MILL 8700 36.1 26.4 137 35.7 31.2 114 WOLVERINE 7650 17.4 7.2 242 18.5 15.2 122 ----- ----- Basin wide percent of average 154 127 WIND RIVER BURROUGHS CREEK 8750 20.7 13.6 152 21.6 19.3 112 CASTLE CREEK 8400 7.2 -M * 10.4 -M * COLD SPRINGS 9630 9.6 4.8 200 11.5 13.9 83 DEER PARK 9700 22.3 18.6 120 26.1 27.0 97 HOBBS PARK 10100 19.1 18.0 106 17.0 16.9 101 LITTLE WARM 9370 15.9 11.1 143 16.4 16.8 98 SOUTH PASS 9040 19.7 18.0 109 17.0 22.7 75 ST. LAWRENCE ALT 8620 3.7 6.1 61 9.7 12.1 80 TOGWOTEE PASS 9580 37.8 27.9 135 39.3 29.0 136 TOWNSEND CREEK 8700 9.4 9.1 103 13.6 15.5 88 ----- ----- Basin wide percent of average 124 99 BIGHORN BASIN BALD MTN. 9380 32.1 23.6 136 25.8 21.3 121 BEAR TRAP MEADOW 8200 11.4 2.5 456 12.4 10.9 114 BLACKWATER 9780 36.7 28.8 127 34.6 24.7 140 BONE SPRINGS DIV 9350 28.2 18.3 154 22.6 18.3 123 EVENING STAR 9200 41.5 33.3 125 -M 29.9 * GRAVE SPRINGS 8550 12.3 11.1 111 12.7 13.1 97 KIRWIN 9550 16.9 13.0 130 17.4 14.2 123 MARQUETTE 8760 7.1 -M * 10.1 13.7 74 MIDDLE POWDER 7760 14.8 14.3 103 14.3 15.8 91 OWL CREEK 8975 7.8 4.0 195 9.0 8.2 110 POWDER RIVER PASS 9480 20.7 10.7 193 23.9 15.8 151 SHELL CREEK 9580 24.4 16.8 145 21.8 16.8 130 SYLVAN LAKE 8420 33.2 23.8 139 36.6 24.7 148 SYLVAN ROAD 7120 18.2 8.1 225 27.0 20.5 132 TIMBER CREEK 7950 7.0 4.8 146 8.1 10.5 77 YOUNTS PEAK 8350 23.7 18.1 131 20.9 18.8 111 ----- ----- Basin wide percent of average 142 120 SHOSHONE RIVER BLACKWATER 9780 36.7 28.8 127 34.6 24.7 140 EVENING STAR 9200 41.5 33.3 125 -M 29.9 * KIRWIN 9550 16.9 13.0 130 17.4 14.2 123 MARQUETTE 8760 7.1 -M * 10.1 13.7 74 SYLVAN LAKE 8420 33.2 23.8 139 36.6 24.7 148 SYLVAN ROAD 7120 18.2 8.1 225 27.0 20.5 132 YOUNTS PEAK 8350 23.7 18.1 131 20.9 18.8 111 ----- ----- Basin wide percent of average 136 126 POWDER-TONGUE BEAR TRAP MEADOW 8200 11.4 2.5 456 12.4 10.9 114 BIG GOOSE 7990 13.1 11.6 113 15.2 12.9 118 BONE SPRINGS DIV 9350 28.2 18.3 154 22.6 18.3 123 BURGESS JUNCTION 7880 15.9 13.3 120 16.6 15.4 108 CLOUD PEAK RESERVOIR 9860 22.0 16.2 136 20.5 17.1 120 DOME LAKE 8880 19.4 13.5 144 18.9 16.8 113 GRAVE SPRINGS 8550 12.3 11.1 111 12.7 13.1 97 HANSEN SAWMILL 8360 10.5 4.9 214 12.0 11.0 109 LITTLE GOOSE 8870 15.5 -M * 19.6 -M * MIDDLE POWDER 7760 14.8 14.3 103 14.3 15.8 91 POWDER RIVER PASS 9480 20.7 10.7 193 23.9 15.8 151 SOLDIER PARK 8720 11.8 -M * 13.0 -M * SUCKER CREEK 8880 18.9 13.1 144 20.8 17.4 120 TIE CREEK 6870 8.8 3.9 226 14.5 13.5 107 ----- ----- Basin wide percent of average 147 115 BELLE FOURCHE BLIND PARK 6890 -M 4.0 * 21.6 14.2 152 COLE CANYON 5910 9.2 5.0 184 16.4 9.5 173 NORTH RAPID CREEK 6130 6.2 3.8 163 16.9 11.4 148 ----- ----- Basin wide percent of average 175 156 UPPER N. PLATTE RIVER CINNABAR PARK 9574 30.7 16.0 192 36.9 23.6 156 COLUMBINE 9160 40.5 20.9 194 44.2 29.2 151 DIVIDE PEAK 8880 31.8 19.3 165 36.6 24.3 151 ELK RIVER 8700 30.5 15.0 203 34.0 23.0 148 JOE WRIGHT 10120 48.0 25.1 191 48.2 30.1 160 NORTH FRENCH CREEK 10130 -M 34.5 * 59.0 29.7 199 OLD BATTLE 10000 56.7 36.9 154 47.3 39.9 119 SAGE CREEK BASIN 7850 19.4 11.2 173 23.9 14.1 170 SOUTH BRUSH CREEK 8440 25.2 11.1 227 30.5 20.1 152 TOWER 10500 72.6 52.2 139 47.7 45.1 106 WEBBER SPRINGS 9250 39.4 25.1 157 46.1 31.1 148 WILLOW CREEK PASS 9540 27.0 14.2 190 24.7 15.7 157 ----- ----- Basin wide percent of average 171 147 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 42.0 28.2 149 38.0 27.0 141 CASPER MTN. 7900 13.6 17.1 80 18.6 19.5 95 DEADMAN HILL 10220 31.2 19.7 158 30.5 21.0 145 DEER PARK 9700 22.3 18.6 120 26.1 27.0 97 LAPRELE CREEK 8375 14.9 7.1 210 18.0 16.5 109 RENO HILL 8400 18.7 14.7 127 22.2 20.2 110 ROACH 9700 28.2 18.5 152 31.3 22.4 140 SAND LAKE 10050 49.4 37.0 134 -M 29.3 * SOUTH PASS 9040 19.7 18.0 109 17.0 22.7 75 WINDY PEAK 7900 10.0 4.9 204 16.6 13.5 123 ----- ----- Basin wide percent of average 136 115 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 4.6 * 21.6 18.6 116 DIVIDE PEAK 8880 31.8 19.3 165 36.6 24.3 151 OLD BATTLE 10000 56.7 36.9 154 47.3 39.9 119 SANDSTONE RS 8150 23.1 9.5 243 33.6 21.9 153 WHISKEY PARK 8950 -M 30.5 * 53.5 33.8 158 ----- ----- Basin wide percent of average 170 139 UPPER GREEN RIVER BIG SANDY OPENING 9080 19.5 13.5 144 19.6 15.9 123 BLIND BULL SUM 8650 43.7 27.9 157 28.8 25.2 114 EAST RIM DIVIDE 7930 17.4 13.2 132 16.7 13.9 120 ELKHART PARK G.S. 9400 17.9 12.8 140 17.4 16.0 109 GROS VENTRE SUMMIT 8750 18.7 13.3 141 19.1 15.3 125 GUNSIGHT PASS 9820 23.8 -M * 21.9 -M * KENDALL R.S. 7740 14.5 10.0 145 19.6 16.6 118 LOOMIS PARK 8240 25.3 14.3 177 26.6 19.9 134 NEW FORK LAKE 8340 15.1 8.4 180 14.1 13.4 105 POCKET CREEK 9360 17.2 -M * 18.6 -M * SNIDER BASIN 8060 24.4 12.6 194 23.1 18.5 125 SPRING CREEK DIVIDE 9000 44.5 28.6 156 40.4 30.2 134 TRIPLE PEAK 8500 42.2 23.7 178 42.9 28.6 150 ----- ----- Basin wide percent of average 159 126 LOWER GREEN RIVER HAMS FORK 7840 17.9 6.0 298 19.0 14.7 129 HEWINTA 9519 17.5 9.3 188 23.0 17.8 129 HICKERSON PARK 9145 4.3 5.7 75 12.7 10.2 125 HOLE-IN-ROCK 9150 9.2 4.7 196 14.7 9.7 152 INDIAN CREEK 9425 40.4 28.3 143 33.6 29.5 114 KELLEY R.S. 8180 26.5 14.1 188 29.7 23.6 126 STEEL CREEK PARK 10200 24.9 18.7 133 27.0 20.2 134 ----- ----- Basin wide percent of average 162 127 UPPER BEAR RIVER BUG LAKE 7950 -M 18.0 * -M 22.4 * HAYDEN FORK 9212 -M 13.0 * 37.9 25.1 151 KELLEY R.S. 8180 26.5 14.1 188 29.7 23.6 126 LILY LAKE 9156 27.6 11.1 249 28.9 21.1 137 MONTE CRISTO 8960 48.8 28.3 172 46.7 30.3 154 SALT RIVER SUMMIT 7760 21.1 10.6 199 26.8 21.6 124 TRIAL LAKE 9992 47.3 26.5 178 42.4 29.4 144 ----- ----- Basin wide percent of average 189 141 ----------------------------------------------------------------------------- -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.