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 22 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 15.0 3.3 455 34.2 26.2 131 COTTONWOOD CREEK 7670 32.0 10.4 308 48.0 34.7 138 GRAND TARGHEE 9260 68.4 -M * -M -M * GRANITE CREEK 6770 17.2 5.0 344 33.1 24.1 137 GRASSY LAKE 7265 39.2 22.0 178 55.2 43.8 126 GROS VENTRE SUMMIT 8750 18.3 7.5 244 22.8 16.9 135 GUNSIGHT PASS 9820 -M -M * 26.6 -M * LEWIS LAKE DIVIDE 7850 48.9 24.9 196 49.3 44.3 111 PHILLIPS BENCH 8200 39.7 20.2 197 46.0 35.6 129 SALT RIVER SUMMIT 7760 12.4 1.5 827 28.2 23.4 121 SNAKE RIVER STATION 6920 -M 2.1 * 35.4 27.5 129 SPRING CREEK DIVIDE 9000 42.7 21.2 201 42.5 32.3 132 THUMB DIVIDE 7980 18.4 6.6 279 28.7 24.0 120 TOGWOTEE PASS 9580 41.6 25.8 161 43.7 31.6 138 TWO OCEAN PLATEAU 9240 -M 29.0 * 43.4 35.1 124 WILLOW CREEK 8380 42.6 21.2 201 56.0 41.2 136 ----- ----- Basin wide percent of average 217 129 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 33.9 24.0 141 34.6 26.0 133 BLACK BEAR 8170 51.5 33.3 155 58.4 49.0 119 CANYON 7870 16.1 4.3 374 25.0 19.6 128 FISHER CREEK 9100 53.6 34.0 158 54.1 45.2 120 MADISON PLATEAU 7750 30.7 15.6 197 41.3 33.0 125 NORTHEAST ENTRANCE 7350 4.8 1.3 369 21.9 16.7 131 PARKER PEAK 9400 38.4 22.5 171 38.4 22.0 175 SYLVAN LAKE 8420 27.5 17.0 162 38.9 27.6 141 THUMB DIVIDE 7980 18.4 6.6 279 28.7 24.0 120 TWO OCEAN PLATEAU 9240 -M 29.0 * 43.4 35.1 124 WHISKEY CREEK 6800 15.4 6.1 252 30.8 26.3 117 WHITE MILL 8700 36.5 22.5 162 39.0 34.0 115 WOLVERINE 7650 6.3 1.1 573* 20.1 17.4 116 ----- ----- Basin wide percent of average 177 126 WIND RIVER BURROUGHS CREEK 8750 21.7 7.6 286 26.4 21.6 122 CASTLE CREEK 8400 .0 -M * 13.0 -M * COLD SPRINGS 9630 11.2 1.6 700 18.1 16.2 112 DEER PARK 9700 23.6 15.1 156 30.7 29.8 103 HOBBS PARK 10100 24.1 14.6 165 24.5 19.9 123 LITTLE WARM 9370 -M 4.9 * 20.8 19.1 109 SOUTH PASS 9040 19.9 10.3 193 22.9 25.2 91 ST. LAWRENCE ALT 8620 4.1 1.5 273 17.4 14.3 122 TOGWOTEE PASS 9580 41.6 25.8 161 43.7 31.6 138 TOWNSEND CREEK 8700 8.5 3.5 243 20.0 17.9 112 ----- ----- Basin wide percent of average 193 115 BIGHORN BASIN BALD MTN. 9380 -M 21.2 * 30.4 24.3 125 BEAR TRAP MEADOW 8200 10.8 .0 * 17.1 13.2 130 BLACKWATER 9780 39.9 28.3 141 38.5 27.5 140 BONE SPRINGS DIV 9350 31.9 13.4 238 27.4 21.1 130 EVENING STAR 9200 40.3 30.6 132 47.5 33.0 144 GRAVE SPRINGS 8550 -M 3.6 * -M 15.3 * KIRWIN 9550 18.7 9.2 203 22.4 16.5 136 MARQUETTE 8760 13.7 -M * 17.9 16.7 107 MIDDLE POWDER 7760 17.5 7.2 243 -M 18.2 * OWL CREEK 8975 4.0 1.2 333 12.1 10.2 119 POWDER RIVER PASS 9480 22.4 5.4 415 28.1 18.5 152 SHELL CREEK 9580 27.3 14.3 191 -M 19.4 * SYLVAN LAKE 8420 27.5 17.0 162 38.9 27.6 141 SYLVAN ROAD 7120 2.8 .7 400* 29.0 22.5 129 TIMBER CREEK 7950 4.8 1.3 369 14.0 13.3 105 YOUNTS PEAK 8350 22.5 12.4 181 24.2 21.0 115 ----- ----- Basin wide percent of average 192 131 SHOSHONE RIVER BLACKWATER 9780 39.9 28.3 141 38.5 27.5 140 EVENING STAR 9200 40.3 30.6 132 47.5 33.0 144 KIRWIN 9550 18.7 9.2 203 22.4 16.5 136 MARQUETTE 8760 13.7 -M * 17.9 16.7 107 SYLVAN LAKE 8420 27.5 17.0 162 38.9 27.6 141 SYLVAN ROAD 7120 2.8 .7 400* 29.0 22.5 129 YOUNTS PEAK 8350 22.5 12.4 181 24.2 21.0 115 ----- ----- Basin wide percent of average 154 133 POWDER-TONGUE BEAR TRAP MEADOW 8200 10.8 .0 * 17.1 13.2 130 BIG GOOSE 7990 -M 7.3 * 21.3 15.5 137 BONE SPRINGS DIV 9350 31.9 13.4 238 27.4 21.1 130 BURGESS JUNCTION 7880 17.6 7.2 244 -M 17.7 * CLOUD PEAK RESERVOIR 9860 24.9 12.3 202 26.2 20.4 128 DOME LAKE 8880 20.9 7.2 290 24.1 19.6 123 GRAVE SPRINGS 8550 -M 3.6 * -M 15.3 * HANSEN SAWMILL 8360 -M .9 * 16.6 13.1 127 LITTLE GOOSE 8870 18.9 -M * 25.7 -M * MIDDLE POWDER 7760 17.5 7.2 243 -M 18.2 * POWDER RIVER PASS 9480 22.4 5.4 415 28.1 18.5 152 SOLDIER PARK 8720 11.6 -M * 17.1 -M * SUCKER CREEK 8880 -M 7.6 * 28.0 20.4 137 TIE CREEK 6870 6.3 .2 3150* 22.0 16.2 136 ----- ----- Basin wide percent of average 288* 133 BELLE FOURCHE BLIND PARK 6890 .8 .0 * 25.7 16.8 153 COLE CANYON 5910 .3 .0 * -M 11.9 * NORTH RAPID CREEK 6130 .0 .1 0* 21.2 13.2 161 ----- ----- Basin wide percent of average 1100* 156 UPPER N. PLATTE RIVER CINNABAR PARK 9574 30.2 6.7 451 45.8 26.1 175 COLUMBINE 9160 -M 8.0 * 48.0 31.4 153 DIVIDE PEAK 8880 28.8 8.7 331 40.6 26.6 153 ELK RIVER 8700 -M 4.2 * 37.0 25.2 147 JOE WRIGHT 10120 52.2 21.8 239 -M 33.5 * NORTH FRENCH CREEK 10130 64.0 30.4 211 61.6 33.0 187 OLD BATTLE 10000 59.2 32.3 183 64.9 43.1 151 SAGE CREEK BASIN 7850 3.2 5.0 64 25.7 15.4 167 SOUTH BRUSH CREEK 8440 17.5 4.2 417 33.7 22.7 148 TOWER 10500 79.0 49.2 161 68.8 48.7 141 WEBBER SPRINGS 9250 34.3 13.2 260 49.8 33.7 148 WILLOW CREEK PASS 9540 -M 7.9 * 28.3 17.8 159 ----- ----- Basin wide percent of average 215 156 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 41.4 18.7 221 -M 30.0 * CASPER MTN. 7900 10.8 8.2 132 22.0 22.8 96 DEADMAN HILL 10220 32.2 15.8 204 34.3 23.7 145 DEER PARK 9700 23.6 15.1 156 30.7 29.8 103 LAPRELE CREEK 8375 9.9 2.1 471 21.1 19.1 110 RENO HILL 8400 17.5 6.7 261 26.1 23.5 111 ROACH 9700 26.8 10.2 263 35.0 25.3 138 SAND LAKE 10050 53.0 32.7 162 51.4 32.9 156 SOUTH PASS 9040 19.9 10.3 193 22.9 25.2 91 WINDY PEAK 7900 3.5 .8 438* 19.0 16.0 119 ----- ----- Basin wide percent of average 198 120 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M .0 * 24.6 20.3 121 DIVIDE PEAK 8880 28.8 8.7 331 40.6 26.6 153 OLD BATTLE 10000 59.2 32.3 183 64.9 43.1 151 SANDSTONE RS 8150 14.3 1.7 841 36.4 24.0 152 WHISKEY PARK 8950 -M 22.1 * 57.8 36.8 157 ----- ----- Basin wide percent of average 240 149 UPPER GREEN RIVER BIG SANDY OPENING 9080 14.5 6.1 238 21.1 17.8 119 BLIND BULL SUM 8650 43.2 22.5 192 31.2 27.2 115 EAST RIM DIVIDE 7930 4.2 6.3 67 18.8 15.4 122 ELKHART PARK G.S. 9400 15.4 7.1 217 19.2 18.1 106 GROS VENTRE SUMMIT 8750 18.3 7.5 244 22.8 16.9 135 GUNSIGHT PASS 9820 -M -M * 26.6 -M * KENDALL R.S. 7740 7.1 .0 * 22.3 18.0 124 LOOMIS PARK 8240 17.6 6.8 259 29.5 21.7 136 NEW FORK LAKE 8340 7.3 1.2 608 15.9 15.1 105 POCKET CREEK 9360 14.6 -M * 20.3 -M * SNIDER BASIN 8060 15.3 4.5 340 25.3 19.9 127 SPRING CREEK DIVIDE 9000 42.7 21.2 201 42.5 32.3 132 TRIPLE PEAK 8500 35.9 12.4 290 45.2 31.0 146 ----- ----- Basin wide percent of average 232 126 LOWER GREEN RIVER HAMS FORK 7840 5.2 .0 * 21.3 16.3 131 HEWINTA 9519 13.3 2.3 578 27.1 19.6 138 HICKERSON PARK 9145 .0 .7 0* 17.0 11.9 143 HOLE-IN-ROCK 9150 3.1 .6 517* 18.9 11.5 164 INDIAN CREEK 9425 37.7 20.4 185 36.1 31.6 114 KELLEY R.S. 8180 18.6 6.1 305 31.5 25.4 124 STEEL CREEK PARK 10200 28.6 16.1 178 31.5 22.3 141 ----- ----- Basin wide percent of average 231 132 UPPER BEAR RIVER BUG LAKE 7950 33.2 7.0 474 39.3 24.3 162 HAYDEN FORK 9212 20.4 4.5 453 41.1 27.5 149 KELLEY R.S. 8180 18.6 6.1 305 31.5 25.4 124 LILY LAKE 9156 24.0 4.0 600 32.6 23.2 141 MONTE CRISTO 8960 48.1 18.8 256 50.5 33.1 153 SALT RIVER SUMMIT 7760 12.4 1.5 827 28.2 23.4 121 TRIAL LAKE 9992 51.3 20.1 255 46.2 32.2 143 ----- ----- Basin wide percent of average 335 142 ----------------------------------------------------------------------------- -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.