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 13 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 21.3 7.4 288 33.8 25.4 133 COTTONWOOD CREEK 7670 36.4 14.9 244 46.8 33.6 139 GRAND TARGHEE 9260 66.4 -M * -M -M * GRANITE CREEK 6770 22.4 8.6 260 32.8 23.4 140 GRASSY LAKE 7265 46.2 27.7 167 54.8 42.6 129 GROS VENTRE SUMMIT 8750 20.0 10.5 190 22.2 16.2 137 GUNSIGHT PASS 9820 -M -M * 25.4 -M * LEWIS LAKE DIVIDE 7850 56.1 30.0 187 49.1 43.2 114 PHILLIPS BENCH 8200 43.6 25.1 174 45.5 34.6 132 SALT RIVER SUMMIT 7760 17.9 5.8 309 27.7 22.6 123 SNAKE RIVER STATION 6920 -M 6.7 * 35.3 26.7 132 SPRING CREEK DIVIDE 9000 45.1 25.5 177 41.8 31.4 133 THUMB DIVIDE 7980 26.1 10.5 249 28.6 23.2 123 TOGWOTEE PASS 9580 41.5 27.7 150 -M 30.6 * TWO OCEAN PLATEAU 9240 -M 31.0 * -M 33.8 * WILLOW CREEK 8380 48.8 26.3 186 55.0 39.8 138 ----- ----- Basin wide percent of average 193 131 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 33.9 25.7 132 33.4 25.0 134 BLACK BEAR 8170 57.1 37.2 153 58.1 47.7 122 CANYON 7870 18.7 7.7 243 24.8 18.8 132 FISHER CREEK 9100 53.3 37.2 143 52.4 43.8 120 MADISON PLATEAU 7750 36.9 20.5 180 41.2 31.9 129 NORTHEAST ENTRANCE 7350 10.8 4.1 263 21.1 15.8 134 PARKER PEAK 9400 40.1 24.2 166 34.9 21.0 166 SYLVAN LAKE 8420 31.4 21.1 149 38.6 26.3 147 THUMB DIVIDE 7980 26.1 10.5 249 28.6 23.2 123 TWO OCEAN PLATEAU 9240 -M 31.0 * -M 33.8 * WHISKEY CREEK 6800 21.4 10.8 198 31.0 25.4 122 WHITE MILL 8700 37.6 25.3 149 38.0 32.8 116 WOLVERINE 7650 12.9 3.9 331 20.0 16.5 121 ----- ----- Basin wide percent of average 167 129 WIND RIVER BURROUGHS CREEK 8750 22.7 10.9 208 25.8 20.7 125 CASTLE CREEK 8400 2.4 -M * 12.0 -M * COLD SPRINGS 9630 8.8 3.7 238 14.5 15.3 95 DEER PARK 9700 21.2 17.2 123 27.1 28.5 95 HOBBS PARK 10100 18.7 17.1 109 18.7 18.7 100 LITTLE WARM 9370 17.4 8.3 210 20.4 18.2 112 SOUTH PASS 9040 16.6 14.7 113 17.6 24.3 72 ST. LAWRENCE ALT 8620 1.8 4.3 42 13.0 13.5 96 TOGWOTEE PASS 9580 41.5 27.7 150 -M 30.6 * TOWNSEND CREEK 8700 5.5 6.3 87 14.4 17.0 85 ----- ----- Basin wide percent of average 140 97 BIGHORN BASIN BALD MTN. 9380 33.6 23.4 144 27.7 23.1 120 BEAR TRAP MEADOW 8200 10.1 1.0 1010 14.4 12.2 118 BLACKWATER 9780 39.6 28.9 137 37.5 26.4 142 BONE SPRINGS DIV 9350 28.8 16.7 172 24.3 20.0 122 EVENING STAR 9200 42.5 32.8 130 46.8 31.7 148 GRAVE SPRINGS 8550 11.2 8.8 127 13.7 14.5 94 KIRWIN 9550 17.5 11.6 151 19.7 15.6 126 MARQUETTE 8760 10.0 -M * 13.4 15.5 86 MIDDLE POWDER 7760 14.9 11.7 127 15.4 17.3 89 OWL CREEK 8975 4.1 2.6 158 10.1 9.3 109 POWDER RIVER PASS 9480 21.0 8.6 244 25.8 17.4 148 SHELL CREEK 9580 25.1 16.7 150 23.7 18.4 129 SYLVAN LAKE 8420 31.4 21.1 149 38.6 26.3 147 SYLVAN ROAD 7120 10.2 3.3 309 29.0 21.7 134 TIMBER CREEK 7950 4.7 2.5 188 11.4 12.1 94 YOUNTS PEAK 8350 24.7 16.1 153 24.0 20.1 119 ----- ----- Basin wide percent of average 155 125 SHOSHONE RIVER BLACKWATER 9780 39.6 28.9 137 37.5 26.4 142 EVENING STAR 9200 42.5 32.8 130 46.8 31.7 148 KIRWIN 9550 17.5 11.6 151 19.7 15.6 126 MARQUETTE 8760 10.0 -M * 13.4 15.5 86 SYLVAN LAKE 8420 31.4 21.1 149 38.6 26.3 147 SYLVAN ROAD 7120 10.2 3.3 309 29.0 21.7 134 YOUNTS PEAK 8350 24.7 16.1 153 24.0 20.1 119 ----- ----- Basin wide percent of average 146 133 POWDER-TONGUE BEAR TRAP MEADOW 8200 10.1 1.0 1010 14.4 12.2 118 BIG GOOSE 7990 12.9 9.5 136 17.0 14.6 116 BONE SPRINGS DIV 9350 28.8 16.7 172 24.3 20.0 122 BURGESS JUNCTION 7880 15.5 10.8 144 18.3 16.8 109 CLOUD PEAK RESERVOIR 9860 22.2 15.1 147 22.5 19.1 118 DOME LAKE 8880 19.2 11.0 175 20.7 18.5 112 GRAVE SPRINGS 8550 11.2 8.8 127 13.7 14.5 94 HANSEN SAWMILL 8360 9.8 2.7 363 13.9 12.2 114 LITTLE GOOSE 8870 15.7 -M * 21.5 -M * MIDDLE POWDER 7760 14.9 11.7 127 15.4 17.3 89 POWDER RIVER PASS 9480 21.0 8.6 244 25.8 17.4 148 SOLDIER PARK 8720 11.4 -M * 14.5 -M * SUCKER CREEK 8880 19.5 10.8 181 23.0 19.2 120 TIE CREEK 6870 6.8 1.7 400 15.9 15.1 105 ----- ----- Basin wide percent of average 177 114 BELLE FOURCHE BLIND PARK 6890 5.4 .5 1080* 22.9 15.7 146 COLE CANYON 5910 3.8 1.0 380 17.8 11.0 162 NORTH RAPID CREEK 6130 .0 .8 0* 17.8 12.5 142 ----- ----- Basin wide percent of average 400* 149 UPPER N. PLATTE RIVER CINNABAR PARK 9574 32.4 12.0 270 43.1 25.2 171 COLUMBINE 9160 36.0 14.5 248 45.2 30.5 148 DIVIDE PEAK 8880 29.9 13.9 215 38.2 25.7 149 ELK RIVER 8700 26.0 8.7 299 34.9 24.3 144 JOE WRIGHT 10120 49.9 24.2 206 49.8 32.1 155 NORTH FRENCH CREEK 10130 62.5 33.6 186 -M 31.7 * OLD BATTLE 10000 57.1 36.1 158 61.5 41.9 147 SAGE CREEK BASIN 7850 10.7 8.1 132 24.3 14.9 163 SOUTH BRUSH CREEK 8440 20.5 7.2 285 31.5 21.7 145 TOWER 10500 73.8 51.9 142 68.3 47.4 144 WEBBER SPRINGS 9250 36.5 19.4 188 47.6 32.7 146 WILLOW CREEK PASS 9540 26.1 11.9 219 26.2 16.9 155 ----- ----- Basin wide percent of average 191 150 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 40.1 24.2 166 42.1 28.9 146 CASPER MTN. 7900 11.2 12.7 88 19.9 21.5 93 DEADMAN HILL 10220 31.0 18.5 168 32.3 22.6 143 DEER PARK 9700 21.2 17.2 123 27.1 28.5 95 LAPRELE CREEK 8375 11.8 4.1 288 19.4 18.0 108 RENO HILL 8400 18.1 10.5 172 24.6 22.2 111 ROACH 9700 26.6 14.4 185 32.6 24.1 135 SAND LAKE 10050 50.4 36.0 140 48.7 31.5 155 SOUTH PASS 9040 16.6 14.7 113 17.6 24.3 72 WINDY PEAK 7900 6.1 2.1 290 17.9 15.0 119 ----- ----- Basin wide percent of average 151 119 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 1.2 * 22.4 19.6 114 DIVIDE PEAK 8880 29.9 13.9 215 38.2 25.7 149 OLD BATTLE 10000 57.1 36.1 158 61.5 41.9 147 SANDSTONE RS 8150 18.1 4.5 402 34.2 23.2 147 WHISKEY PARK 8950 -M 27.5 * 54.9 35.8 153 ----- ----- Basin wide percent of average 193 144 UPPER GREEN RIVER BIG SANDY OPENING 9080 17.7 9.8 181 20.6 17.0 121 BLIND BULL SUM 8650 45.2 25.5 177 31.1 26.4 118 EAST RIM DIVIDE 7930 11.6 9.9 117 18.5 14.7 126 ELKHART PARK G.S. 9400 17.6 10.0 176 18.7 17.2 109 GROS VENTRE SUMMIT 8750 20.0 10.5 190 22.2 16.2 137 GUNSIGHT PASS 9820 -M -M * 25.4 -M * KENDALL R.S. 7740 11.7 4.7 249 21.8 17.4 125 LOOMIS PARK 8240 23.0 10.4 221 29.0 21.0 138 NEW FORK LAKE 8340 12.0 4.6 261 15.6 14.4 108 POCKET CREEK 9360 16.1 -M * 19.3 -M * SNIDER BASIN 8060 19.9 8.5 234 24.5 19.3 127 SPRING CREEK DIVIDE 9000 45.1 25.5 177 41.8 31.4 133 TRIPLE PEAK 8500 40.6 18.3 222 44.8 30.1 149 ----- ----- Basin wide percent of average 192 128 LOWER GREEN RIVER HAMS FORK 7840 9.9 1.8 550 19.5 15.7 124 HEWINTA 9519 14.8 5.2 285 24.6 18.9 130 HICKERSON PARK 9145 .5 2.6 19 14.5 11.2 129 HOLE-IN-ROCK 9150 6.0 2.1 286 16.3 10.8 151 INDIAN CREEK 9425 39.1 24.6 159 34.5 30.8 112 KELLEY R.S. 8180 22.2 9.9 224 30.5 24.7 123 STEEL CREEK PARK 10200 26.3 18.5 142 28.8 21.5 134 ----- ----- Basin wide percent of average 184 126 UPPER BEAR RIVER BUG LAKE 7950 34.7 12.0 289 36.9 23.6 156 HAYDEN FORK 9212 25.1 8.2 306 39.1 26.6 147 KELLEY R.S. 8180 22.2 9.9 224 30.5 24.7 123 LILY LAKE 9156 24.9 7.0 356 30.3 22.4 135 MONTE CRISTO 8960 48.5 23.6 206 47.7 32.0 149 SALT RIVER SUMMIT 7760 17.9 5.8 309 27.7 22.6 123 TRIAL LAKE 9992 49.8 23.9 208 44.0 31.1 141 ----- ----- Basin wide percent of average 247 140 ----------------------------------------------------------------------------- -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.