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 THURSDAY: MAY 19 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 16.4 4.7 349 34.0 26.0 131 COTTONWOOD CREEK 7670 32.4 12.0 270 47.3 34.4 138 GRAND TARGHEE 9260 68.4 -M * -M -M * GRANITE CREEK 6770 18.3 6.3 290 33.0 23.9 138 GRASSY LAKE 7265 41.2 24.0 172 55.1 43.4 127 GROS VENTRE SUMMIT 8750 18.8 8.6 219 22.6 16.7 135 GUNSIGHT PASS 9820 -M -M * 26.0 -M * LEWIS LAKE DIVIDE 7850 51.3 26.8 191 49.2 43.9 112 PHILLIPS BENCH 8200 40.5 22.0 184 45.7 35.2 130 SALT RIVER SUMMIT 7760 13.5 3.0 450 27.9 23.1 121 SNAKE RIVER STATION 6920 -M 3.7 * 35.4 27.2 130 SPRING CREEK DIVIDE 9000 42.5 22.8 186 42.1 32.0 132 THUMB DIVIDE 7980 19.5 8.0 244 28.7 23.7 121 TOGWOTEE PASS 9580 41.3 26.6 155 43.4 31.3 139 TWO OCEAN PLATEAU 9240 51.9 29.8 174 43.0 34.7 124 WILLOW CREEK 8380 43.3 23.1 187 55.3 40.8 136 ----- ----- Basin wide percent of average 198 129 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 32.6 24.8 131 33.4 25.7 130 BLACK BEAR 8170 53.8 34.9 154 58.4 48.6 120 CANYON 7870 17.2 5.6 307 25.0 19.3 130 FISHER CREEK 9100 52.0 35.4 147 52.7 44.8 118 MADISON PLATEAU 7750 32.3 17.5 185 41.3 32.6 127 NORTHEAST ENTRANCE 7350 5.7 1.9 300 21.1 16.4 129 PARKER PEAK 9400 37.9 23.4 162 35.4 21.7 163 SYLVAN LAKE 8420 27.7 18.8 147 38.7 27.2 142 THUMB DIVIDE 7980 19.5 8.0 244 28.7 23.7 121 TWO OCEAN PLATEAU 9240 51.9 29.8 174 43.0 34.7 124 WHISKEY CREEK 6800 17.0 7.7 221 30.9 26.0 119 WHITE MILL 8700 36.3 23.7 153 38.3 33.6 114 WOLVERINE 7650 7.8 1.8 433 19.9 17.1 116 ----- ----- Basin wide percent of average 168 126 WIND RIVER BURROUGHS CREEK 8750 22.1 9.3 238 26.4 21.3 124 CASTLE CREEK 8400 .4 -M * 12.7 -M * COLD SPRINGS 9630 9.4 2.6 362 16.0 15.9 101 DEER PARK 9700 21.0 16.6 127 27.8 29.4 95 HOBBS PARK 10100 20.4 15.8 129 20.9 19.5 107 LITTLE WARM 9370 17.1 6.3 271 20.6 18.8 110 SOUTH PASS 9040 16.1 12.1 133 18.6 24.9 75 ST. LAWRENCE ALT 8620 1.4 2.6 54 15.0 14.1 106 TOGWOTEE PASS 9580 41.3 26.6 155 43.4 31.3 139 TOWNSEND CREEK 8700 5.1 4.7 109 16.3 17.6 93 ----- ----- Basin wide percent of average 159 106 BIGHORN BASIN BALD MTN. 9380 33.6 22.3 151 28.5 23.9 119 BEAR TRAP MEADOW 8200 9.0 .2 4500* 15.1 12.9 117 BLACKWATER 9780 39.0 28.8 135 37.6 27.2 138 BONE SPRINGS DIV 9350 28.1 15.1 186 25.0 20.8 120 EVENING STAR 9200 39.9 31.7 126 46.9 32.5 144 GRAVE SPRINGS 8550 10.9 5.7 191 14.7 15.0 98 KIRWIN 9550 16.9 10.2 166 20.6 16.2 127 MARQUETTE 8760 9.9 -M * 14.2 16.3 87 MIDDLE POWDER 7760 14.0 9.1 154 15.6 17.9 87 OWL CREEK 8975 3.6 1.8 200 11.5 9.9 116 POWDER RIVER PASS 9480 20.7 6.8 304 26.5 18.1 146 SHELL CREEK 9580 24.5 15.4 159 24.2 19.1 127 SYLVAN LAKE 8420 27.7 18.8 147 38.7 27.2 142 SYLVAN ROAD 7120 4.9 1.7 288 28.9 22.2 130 TIMBER CREEK 7950 3.6 1.8 200 12.4 12.9 96 YOUNTS PEAK 8350 23.1 13.9 166 24.1 20.7 116 ----- ----- Basin wide percent of average 163 123 SHOSHONE RIVER BLACKWATER 9780 39.0 28.8 135 37.6 27.2 138 EVENING STAR 9200 39.9 31.7 126 46.9 32.5 144 KIRWIN 9550 16.9 10.2 166 20.6 16.2 127 MARQUETTE 8760 9.9 -M * 14.2 16.3 87 SYLVAN LAKE 8420 27.7 18.8 147 38.7 27.2 142 SYLVAN ROAD 7120 4.9 1.7 288 28.9 22.2 130 YOUNTS PEAK 8350 23.1 13.9 166 24.1 20.7 116 ----- ----- Basin wide percent of average 144 130 POWDER-TONGUE BEAR TRAP MEADOW 8200 9.0 .2 4500* 15.1 12.9 117 BIG GOOSE 7990 12.1 8.2 148 17.9 15.2 118 BONE SPRINGS DIV 9350 28.1 15.1 186 25.0 20.8 120 BURGESS JUNCTION 7880 14.0 8.6 163 19.0 17.4 109 CLOUD PEAK RESERVOIR 9860 21.4 13.9 154 23.3 20.0 117 DOME LAKE 8880 18.0 8.9 202 21.5 19.2 112 GRAVE SPRINGS 8550 10.9 5.7 191 14.7 15.0 98 HANSEN SAWMILL 8360 8.0 1.4 571 14.8 12.8 116 LITTLE GOOSE 8870 15.0 -M * 22.3 -M * MIDDLE POWDER 7760 14.0 9.1 154 15.6 17.9 87 POWDER RIVER PASS 9480 20.7 6.8 304 26.5 18.1 146 SOLDIER PARK 8720 10.3 -M * 15.5 -M * SUCKER CREEK 8880 19.0 8.8 216 23.8 20.0 119 TIE CREEK 6870 4.7 .7 671 16.9 15.8 107 ----- ----- Basin wide percent of average 206 114 BELLE FOURCHE BLIND PARK 6890 1.1 .0 * 23.8 16.4 145 COLE CANYON 5910 .0 .3 0* 18.5 11.6 159 NORTH RAPID CREEK 6130 .0 .2 0* 18.7 13.0 144 ----- ----- Basin wide percent of average 220* 149 UPPER N. PLATTE RIVER CINNABAR PARK 9574 31.0 8.7 356 44.4 25.8 172 COLUMBINE 9160 30.9 10.2 303 45.9 31.1 148 DIVIDE PEAK 8880 26.8 10.4 258 38.8 26.3 148 ELK RIVER 8700 21.4 5.5 389 35.5 24.9 143 JOE WRIGHT 10120 50.1 22.8 220 50.5 33.1 153 NORTH FRENCH CREEK 10130 61.2 31.8 192 -M 32.6 * OLD BATTLE 10000 57.7 33.8 171 63.3 42.7 148 SAGE CREEK BASIN 7850 4.9 6.0 82 25.1 15.3 164 SOUTH BRUSH CREEK 8440 16.6 5.1 325 32.0 22.4 143 TOWER 10500 74.7 50.4 148 -M 48.3 * WEBBER SPRINGS 9250 34.0 15.3 222 48.1 33.4 144 WILLOW CREEK PASS 9540 24.9 9.4 265 27.0 17.5 154 ----- ----- Basin wide percent of average 207 151 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 40.1 20.7 194 -M 29.7 * CASPER MTN. 7900 9.1 9.7 94 20.3 22.4 91 DEADMAN HILL 10220 30.7 16.8 183 33.0 23.3 142 DEER PARK 9700 21.0 16.6 127 27.8 29.4 95 LAPRELE CREEK 8375 9.4 2.7 348 20.2 18.7 108 RENO HILL 8400 16.8 8.0 210 25.2 23.1 109 ROACH 9700 25.5 11.6 220 33.5 24.9 135 SAND LAKE 10050 50.6 34.1 148 49.6 32.5 153 SOUTH PASS 9040 16.1 12.1 133 18.6 24.9 75 WINDY PEAK 7900 3.8 1.1 345 18.4 15.7 117 ----- ----- Basin wide percent of average 167 115 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M .0 * 23.2 20.1 115 DIVIDE PEAK 8880 26.8 10.4 258 38.8 26.3 148 OLD BATTLE 10000 57.7 33.8 171 63.3 42.7 148 SANDSTONE RS 8150 13.5 2.5 540 34.9 23.7 147 WHISKEY PARK 8950 -M 24.2 * 55.4 36.5 152 ----- ----- Basin wide percent of average 210 144 UPPER GREEN RIVER BIG SANDY OPENING 9080 15.6 7.4 211 20.9 17.5 119 BLIND BULL SUM 8650 44.3 23.6 188 31.1 27.0 115 EAST RIM DIVIDE 7930 6.4 7.6 84 18.7 15.2 123 ELKHART PARK G.S. 9400 15.8 8.1 195 19.0 17.8 107 GROS VENTRE SUMMIT 8750 18.8 8.6 219 22.6 16.7 135 GUNSIGHT PASS 9820 -M -M * 26.0 -M * KENDALL R.S. 7740 8.6 1.6 538 22.3 17.8 125 LOOMIS PARK 8240 19.4 8.1 240 29.5 21.5 137 NEW FORK LAKE 8340 8.3 2.3 361 15.7 14.9 105 POCKET CREEK 9360 14.7 -M * 19.7 -M * SNIDER BASIN 8060 16.0 5.9 271 25.0 19.7 127 SPRING CREEK DIVIDE 9000 42.5 22.8 186 42.1 32.0 132 TRIPLE PEAK 8500 36.1 14.5 249 44.9 30.7 146 ----- ----- Basin wide percent of average 210 126 LOWER GREEN RIVER HAMS FORK 7840 5.2 .0 * 20.0 16.1 124 HEWINTA 9519 12.0 3.2 375 25.5 19.4 131 HICKERSON PARK 9145 .4 1.2 33 16.0 11.7 137 HOLE-IN-ROCK 9150 2.4 1.0 240 17.7 11.2 158 INDIAN CREEK 9425 36.4 21.9 166 34.9 31.4 111 KELLEY R.S. 8180 18.4 7.4 249 30.6 25.2 121 STEEL CREEK PARK 10200 26.8 17.1 157 29.8 22.0 135 ----- ----- Basin wide percent of average 196 127 UPPER BEAR RIVER BUG LAKE 7950 31.7 8.6 369 38.3 24.1 159 HAYDEN FORK 9212 19.9 5.7 349 40.0 27.2 147 KELLEY R.S. 8180 18.4 7.4 249 30.6 25.2 121 LILY LAKE 9156 22.7 5.0 454 31.4 22.9 137 MONTE CRISTO 8960 46.3 20.5 226 48.9 32.7 150 SALT RIVER SUMMIT 7760 13.5 3.0 450 27.9 23.1 121 TRIAL LAKE 9992 50.4 21.5 234 45.2 31.8 142 ----- ----- Basin wide percent of average 283 140 ----------------------------------------------------------------------------- -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.