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 9 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 22.9 9.1 252 32.5 25.1 129 COTTONWOOD CREEK 7670 36.5 16.6 220 46.3 33.1 140 GRAND TARGHEE 9260 65.0 -M * 46.0 -M * GRANITE CREEK 6770 23.6 10.1 234 31.7 23.1 137 GRASSY LAKE 7265 45.5 29.8 153 53.5 42.0 127 GROS VENTRE SUMMIT 8750 19.1 11.6 165 20.5 15.9 129 GUNSIGHT PASS 9820 -M -M * 23.4 -M * LEWIS LAKE DIVIDE 7850 56.7 31.8 178 48.3 42.7 113 PHILLIPS BENCH 8200 43.2 26.8 161 44.1 34.1 129 SALT RIVER SUMMIT 7760 18.9 7.6 249 27.4 22.3 123 SNAKE RIVER STATION 6920 -M 8.7 * 34.6 26.3 132 SPRING CREEK DIVIDE 9000 44.9 26.9 167 41.0 31.0 132 THUMB DIVIDE 7980 27.9 12.1 231 27.9 22.8 122 TOGWOTEE PASS 9580 39.7 28.0 142 40.4 30.0 135 TWO OCEAN PLATEAU 9240 -M 31.5 * -M 33.3 * WILLOW CREEK 8380 48.7 28.1 173 54.3 39.1 139 ----- ----- Basin wide percent of average 179 130 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 34.1 25.9 132 33.1 24.5 135 BLACK BEAR 8170 56.4 38.3 147 57.5 47.1 122 CANYON 7870 20.6 8.9 231 24.3 18.4 132 FISHER CREEK 9100 53.1 37.5 142 51.4 43.2 119 MADISON PLATEAU 7750 36.8 21.9 168 40.6 31.4 129 NORTHEAST ENTRANCE 7350 13.8 5.2 265 20.8 15.5 134 PARKER PEAK 9400 39.5 24.4 162 33.8 20.5 165 SYLVAN LAKE 8420 33.3 22.1 151 38.0 25.8 147 THUMB DIVIDE 7980 27.9 12.1 231 27.9 22.8 122 TWO OCEAN PLATEAU 9240 -M 31.5 * -M 33.3 * WHISKEY CREEK 6800 22.7 12.4 183 30.1 25.0 120 WHITE MILL 8700 37.7 25.9 146 37.5 32.3 116 WOLVERINE 7650 15.0 5.1 294 19.3 16.0 121 ----- ----- Basin wide percent of average 163 128 WIND RIVER BURROUGHS CREEK 8750 21.3 11.6 184 23.4 20.2 116 CASTLE CREEK 8400 3.0 -M * 11.1 -M * COLD SPRINGS 9630 6.5 4.4 148 11.9 14.9 80 DEER PARK 9700 21.1 16.4 129 26.4 28.0 94 HOBBS PARK 10100 17.7 17.4 102 17.4 18.1 96 LITTLE WARM 9370 15.5 9.1 170 17.6 17.8 99 SOUTH PASS 9040 16.9 16.0 106 17.4 23.8 73 ST. LAWRENCE ALT 8620 .0 4.9 0 10.0 13.1 76 TOGWOTEE PASS 9580 39.7 28.0 142 40.4 30.0 135 TOWNSEND CREEK 8700 6.0 7.2 83 14.0 16.5 85 ----- ----- Basin wide percent of average 126 98 BIGHORN BASIN BALD MTN. 9380 32.8 23.5 140 26.5 22.5 118 BEAR TRAP MEADOW 8200 9.2 1.6 575 12.7 11.8 108 BLACKWATER 9780 38.3 28.7 133 36.2 25.8 140 BONE SPRINGS DIV 9350 28.3 17.3 164 23.4 19.4 121 EVENING STAR 9200 42.1 33.2 127 45.3 31.1 146 GRAVE SPRINGS 8550 11.1 9.8 113 13.0 14.1 92 KIRWIN 9550 16.7 12.3 136 18.6 15.1 123 MARQUETTE 8760 7.3 -M * 10.7 14.9 72 MIDDLE POWDER 7760 14.1 12.7 111 14.6 16.8 87 OWL CREEK 8975 3.6 3.2 113 9.2 9.0 102 POWDER RIVER PASS 9480 20.0 9.3 215 24.4 16.9 144 SHELL CREEK 9580 24.2 16.8 144 22.3 17.9 125 SYLVAN LAKE 8420 33.3 22.1 151 38.0 25.8 147 SYLVAN ROAD 7120 12.4 5.3 234 28.3 21.3 133 TIMBER CREEK 7950 2.8 3.5 80 8.8 11.6 76 YOUNTS PEAK 8350 23.5 17.0 138 22.4 19.6 114 ----- ----- Basin wide percent of average 144 121 SHOSHONE RIVER BLACKWATER 9780 38.3 28.7 133 36.2 25.8 140 EVENING STAR 9200 42.1 33.2 127 45.3 31.1 146 KIRWIN 9550 16.7 12.3 136 18.6 15.1 123 MARQUETTE 8760 7.3 -M * 10.7 14.9 72 SYLVAN LAKE 8420 33.3 22.1 151 38.0 25.8 147 SYLVAN ROAD 7120 12.4 5.3 234 28.3 21.3 133 YOUNTS PEAK 8350 23.5 17.0 138 22.4 19.6 114 ----- ----- Basin wide percent of average 140 130 POWDER-TONGUE BEAR TRAP MEADOW 8200 9.2 1.6 575 12.7 11.8 108 BIG GOOSE 7990 12.5 10.3 121 15.9 14.1 113 BONE SPRINGS DIV 9350 28.3 17.3 164 23.4 19.4 121 BURGESS JUNCTION 7880 15.8 11.9 133 17.5 16.4 107 CLOUD PEAK RESERVOIR 9860 21.1 15.6 135 21.3 18.4 116 DOME LAKE 8880 18.9 11.8 160 19.5 18.0 108 GRAVE SPRINGS 8550 11.1 9.8 113 13.0 14.1 92 HANSEN SAWMILL 8360 8.8 3.7 238 12.3 11.8 104 LITTLE GOOSE 8870 14.9 -M * 20.3 -M * MIDDLE POWDER 7760 14.1 12.7 111 14.6 16.8 87 POWDER RIVER PASS 9480 20.0 9.3 215 24.4 16.9 144 SOLDIER PARK 8720 10.7 -M * 13.3 -M * SUCKER CREEK 8880 18.7 11.6 161 21.5 18.7 115 TIE CREEK 6870 7.3 2.7 270 15.3 14.6 105 ----- ----- Basin wide percent of average 157 111 BELLE FOURCHE BLIND PARK 6890 7.0 1.8 389 21.8 15.2 143 COLE CANYON 5910 6.0 1.8 333 16.8 10.5 160 NORTH RAPID CREEK 6130 2.1 1.4 150 17.3 12.2 142 ----- ----- Basin wide percent of average 302 147 UPPER N. PLATTE RIVER CINNABAR PARK 9574 32.3 13.8 234 42.6 24.7 172 COLUMBINE 9160 37.4 16.9 221 44.6 30.1 148 DIVIDE PEAK 8880 30.7 16.0 192 37.2 25.2 148 ELK RIVER 8700 26.7 10.9 245 34.4 23.9 144 JOE WRIGHT 10120 48.4 24.8 195 48.5 31.5 154 NORTH FRENCH CREEK 10130 63.0 34.3 184 61.6 31.1 198 OLD BATTLE 10000 57.1 37.0 154 -M 41.2 * SAGE CREEK BASIN 7850 12.1 9.3 130 24.1 14.6 165 SOUTH BRUSH CREEK 8440 21.8 8.6 253 31.0 21.2 146 TOWER 10500 73.3 52.4 140 -M 46.8 * WEBBER SPRINGS 9250 38.4 21.8 176 46.5 32.2 144 WILLOW CREEK PASS 9540 26.0 13.1 198 25.2 16.5 153 ----- ----- Basin wide percent of average 180 158 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 41.4 26.1 159 41.7 28.3 147 CASPER MTN. 7900 11.4 14.5 79 18.7 20.9 89 DEADMAN HILL 10220 30.8 19.2 160 31.0 22.1 140 DEER PARK 9700 21.1 16.4 129 26.4 28.0 94 LAPRELE CREEK 8375 11.7 5.1 229 18.3 17.5 105 RENO HILL 8400 16.8 12.2 138 22.9 21.6 106 ROACH 9700 27.1 16.1 168 31.6 23.6 134 SAND LAKE 10050 50.1 36.7 137 47.9 30.8 156 SOUTH PASS 9040 16.9 16.0 106 17.4 23.8 73 WINDY PEAK 7900 6.9 3.0 230 17.1 14.5 118 ----- ----- Basin wide percent of average 142 118 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 2.3 * 22.3 19.3 116 DIVIDE PEAK 8880 30.7 16.0 192 37.2 25.2 148 OLD BATTLE 10000 57.1 37.0 154 -M 41.2 * SANDSTONE RS 8150 21.1 6.2 340 34.0 22.8 149 WHISKEY PARK 8950 -M 29.0 * 54.0 35.2 153 ----- ----- Basin wide percent of average 184 144 UPPER GREEN RIVER BIG SANDY OPENING 9080 17.7 11.2 158 19.9 16.7 119 BLIND BULL SUM 8650 45.3 26.5 171 30.4 26.0 117 EAST RIM DIVIDE 7930 13.2 11.2 118 17.6 14.4 122 ELKHART PARK G.S. 9400 17.5 11.1 158 18.0 16.8 107 GROS VENTRE SUMMIT 8750 19.1 11.6 165 20.5 15.9 129 GUNSIGHT PASS 9820 -M -M * 23.4 -M * KENDALL R.S. 7740 12.5 6.7 187 20.7 17.1 121 LOOMIS PARK 8240 23.1 11.9 194 27.6 20.6 134 NEW FORK LAKE 8340 12.8 6.0 213 14.4 14.0 103 POCKET CREEK 9360 15.6 -M * 18.8 -M * SNIDER BASIN 8060 20.2 10.1 200 23.6 19.1 124 SPRING CREEK DIVIDE 9000 44.9 26.9 167 41.0 31.0 132 TRIPLE PEAK 8500 41.1 20.4 201 44.0 29.6 149 ----- ----- Basin wide percent of average 174 126 LOWER GREEN RIVER HAMS FORK 7840 12.1 3.3 367 19.3 15.4 125 HEWINTA 9519 14.0 6.6 212 23.5 18.6 126 HICKERSON PARK 9145 .4 3.6 11 13.2 10.9 121 HOLE-IN-ROCK 9150 5.3 3.0 177 15.1 10.4 145 INDIAN CREEK 9425 39.0 26.1 149 34.0 30.4 112 KELLEY R.S. 8180 23.0 11.4 202 30.0 24.3 123 STEEL CREEK PARK 10200 25.3 18.9 134 27.4 21.1 130 ----- ----- Basin wide percent of average 163 124 UPPER BEAR RIVER BUG LAKE 7950 35.0 14.2 246 36.7 23.2 158 HAYDEN FORK 9212 25.6 9.9 259 38.2 26.1 146 KELLEY R.S. 8180 23.0 11.4 202 30.0 24.3 123 LILY LAKE 9156 24.8 8.5 292 29.2 22.0 133 MONTE CRISTO 8960 48.8 25.5 191 47.1 31.4 150 SALT RIVER SUMMIT 7760 18.9 7.6 249 27.4 22.3 123 TRIAL LAKE 9992 -M 25.2 * 42.9 30.5 141 ----- ----- Basin wide percent of average 228 140 ----------------------------------------------------------------------------- -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.