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 TUESDAY: MAY 31 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 10.3 .0 * 36.3 27.0 134 COTTONWOOD CREEK 7670 30.4 5.6 543 50.6 35.7 142 GRAND TARGHEE 9260 70.0 -M * -M -M * GRANITE CREEK 6770 13.8 1.3 1062* 34.8 24.8 140 GRASSY LAKE 7265 36.2 14.9 243 58.0 45.0 129 GROS VENTRE SUMMIT 8750 15.7 4.1 383 23.5 17.6 134 GUNSIGHT PASS 9820 -M -M * 28.0 -M * LEWIS LAKE DIVIDE 7850 44.4 18.7 237 50.8 45.3 112 PHILLIPS BENCH 8200 37.7 14.6 258 47.8 36.5 131 SALT RIVER SUMMIT 7760 9.7 .0 * 29.6 24.0 123 SNAKE RIVER STATION 6920 -M .0 * 37.5 28.3 133 SPRING CREEK DIVIDE 9000 42.5 15.7 271 44.6 33.0 135 THUMB DIVIDE 7980 16.4 2.4 683 30.9 24.7 125 TOGWOTEE PASS 9580 42.8 22.4 191 46.3 32.6 142 TWO OCEAN PLATEAU 9240 53.9 25.6 211 45.6 36.2 126 WILLOW CREEK 8380 42.1 15.1 279 59.2 42.5 139 ----- ----- Basin wide percent of average 282 131 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 34.1 20.6 166 36.9 26.9 137 BLACK BEAR 8170 53.9 26.9 200 63.4 50.2 126 CANYON 7870 14.3 1.7 841 27.2 20.4 133 FISHER CREEK 9100 53.9 30.4 177 56.1 46.5 121 MADISON PLATEAU 7750 31.4 9.6 327 46.2 34.2 135 NORTHEAST ENTRANCE 7350 .0 .5 0* 23.3 17.5 133 PARKER PEAK 9400 41.6 18.9 220 41.8 23.1 181 SYLVAN LAKE 8420 28.5 12.1 236 42.2 28.9 146 THUMB DIVIDE 7980 16.4 2.4 683 30.9 24.7 125 TWO OCEAN PLATEAU 9240 53.9 25.6 211 45.6 36.2 126 WHISKEY CREEK 6800 13.8 1.5 920* 35.1 27.2 129 WHITE MILL 8700 35.3 18.6 190 40.7 35.1 116 WOLVERINE 7650 2.5 .0 * 21.9 18.2 120 ----- ----- Basin wide percent of average 225 131 WIND RIVER BURROUGHS CREEK 8750 20.6 3.8 542 28.5 22.5 127 CASTLE CREEK 8400 .0 -M * 14.4 -M * COLD SPRINGS 9630 10.8 1.1 982 20.0 17.0 118 DEER PARK 9700 25.5 8.5 300 34.0 30.8 110 HOBBS PARK 10100 25.9 10.5 247 27.1 20.9 130 LITTLE WARM 9370 16.1 2.2 732 22.3 19.9 112 SOUTH PASS 9040 20.8 6.8 306 26.0 25.9 100 ST. LAWRENCE ALT 8620 2.1 .7 300* 19.8 15.1 131 TOGWOTEE PASS 9580 42.8 22.4 191 46.3 32.6 142 TOWNSEND CREEK 8700 8.0 1.9 421 22.1 18.7 118 ----- ----- Basin wide percent of average 298 121 BIGHORN BASIN BALD MTN. 9380 41.0 17.0 241 33.8 25.2 134 BEAR TRAP MEADOW 8200 8.0 .0 * 19.7 14.1 140 BLACKWATER 9780 43.0 25.1 171 41.6 28.8 144 BONE SPRINGS DIV 9350 33.2 8.8 377 29.7 22.2 134 EVENING STAR 9200 42.0 27.1 155 51.9 34.3 151 GRAVE SPRINGS 8550 12.8 2.0 640 21.0 16.0 131 KIRWIN 9550 18.7 5.8 322 24.1 17.4 139 MARQUETTE 8760 14.5 -M * 20.1 17.9 112 MIDDLE POWDER 7760 12.6 3.0 420 21.4 19.0 113 OWL CREEK 8975 2.0 .6 333 14.9 11.0 135 POWDER RIVER PASS 9480 23.1 2.6 888 30.4 19.5 156 SHELL CREEK 9580 29.6 10.9 272 29.5 20.4 145 SYLVAN LAKE 8420 28.5 12.1 236 42.2 28.9 146 SYLVAN ROAD 7120 .0 .1 0* 31.3 23.2 135 TIMBER CREEK 7950 2.0 .6 333 16.3 14.3 114 YOUNTS PEAK 8350 20.3 7.6 267 25.3 22.0 115 ----- ----- Basin wide percent of average 257 136 SHOSHONE RIVER BLACKWATER 9780 43.0 25.1 171 41.6 28.8 144 EVENING STAR 9200 42.0 27.1 155 51.9 34.3 151 KIRWIN 9550 18.7 5.8 322 24.1 17.4 139 MARQUETTE 8760 14.5 -M * 20.1 17.9 112 SYLVAN LAKE 8420 28.5 12.1 236 42.2 28.9 146 SYLVAN ROAD 7120 .0 .1 0* 31.3 23.2 135 YOUNTS PEAK 8350 20.3 7.6 267 25.3 22.0 115 ----- ----- Basin wide percent of average 196 137 POWDER-TONGUE BEAR TRAP MEADOW 8200 8.0 .0 * 19.7 14.1 140 BIG GOOSE 7990 13.7 3.3 415 24.1 16.3 148 BONE SPRINGS DIV 9350 33.2 8.8 377 29.7 22.2 134 BURGESS JUNCTION 7880 15.7 3.1 506 25.6 18.4 139 CLOUD PEAK RESERVOIR 9860 27.8 8.2 339 30.0 21.6 139 DOME LAKE 8880 20.7 3.5 591 26.7 20.5 130 GRAVE SPRINGS 8550 12.8 2.0 640 21.0 16.0 131 HANSEN SAWMILL 8360 7.8 .2 3900* 20.1 14.0 144 LITTLE GOOSE 8870 18.1 -M * 27.7 -M * MIDDLE POWDER 7760 12.6 3.0 420 21.4 19.0 113 POWDER RIVER PASS 9480 23.1 2.6 888 30.4 19.5 156 SOLDIER PARK 8720 11.3 -M * 20.5 -M * SUCKER CREEK 8880 24.3 4.0 608 31.3 21.4 146 TIE CREEK 6870 3.4 .0 * 24.9 17.1 146 ----- ----- Basin wide percent of average 525 139 BELLE FOURCHE BLIND PARK 6890 .0 .0 100* 28.5 17.8 160 COLE CANYON 5910 .0 .0 100* 24.4 12.8 191 NORTH RAPID CREEK 6130 .0 .0 100* 24.5 13.9 176 ----- ----- Basin wide percent of average * 174 UPPER N. PLATTE RIVER CINNABAR PARK 9574 28.3 1.9 1489 46.9 26.7 176 COLUMBINE 9160 24.8 2.4 1033* 48.5 32.1 151 DIVIDE PEAK 8880 21.8 4.1 532 41.0 27.4 150 ELK RIVER 8700 16.1 1.5 1073* 37.9 25.9 146 JOE WRIGHT 10120 51.1 17.6 290 53.6 34.7 154 NORTH FRENCH CREEK 10130 64.2 24.6 261 61.6 34.2 180 OLD BATTLE 10000 58.2 26.4 220 67.1 44.1 152 SAGE CREEK BASIN 7850 .0 2.4 0 25.9 15.9 163 SOUTH BRUSH CREEK 8440 -M 1.9 * 33.2 23.6 141 TOWER 10500 78.8 43.4 182 72.0 49.9 144 WEBBER SPRINGS 9250 28.9 7.1 407 51.1 34.6 148 WILLOW CREEK PASS 9540 -M 3.6 * 28.9 18.7 155 ----- ----- Basin wide percent of average 283 154 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 -M 12.3 * 47.1 31.0 152 CASPER MTN. 7900 4.9 4.5 109 23.5 23.9 98 DEADMAN HILL 10220 30.4 11.7 260 35.0 24.6 142 DEER PARK 9700 25.5 8.5 300 34.0 30.8 110 LAPRELE CREEK 8375 3.5 .9 389* 22.3 20.0 112 RENO HILL 8400 12.0 3.7 324 27.5 24.6 112 ROACH 9700 22.9 6.3 363 35.7 26.3 136 SAND LAKE 10050 52.2 26.6 196 52.9 34.2 155 SOUTH PASS 9040 20.8 6.8 306 26.0 25.9 100 WINDY PEAK 7900 .0 .1 0* 20.4 17.0 120 ----- ----- Basin wide percent of average 249 126 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M .0 * 25.8 20.9 123 DIVIDE PEAK 8880 21.8 4.1 532 41.0 27.4 150 OLD BATTLE 10000 58.2 26.4 220 67.1 44.1 152 SANDSTONE RS 8150 7.3 .1 7300* 37.4 24.7 151 WHISKEY PARK 8950 -M 14.4 * 59.4 37.7 158 ----- ----- Basin wide percent of average 285* 149 UPPER GREEN RIVER BIG SANDY OPENING 9080 14.3 1.9 753 23.9 18.5 129 BLIND BULL SUM 8650 42.2 18.3 231 32.3 28.0 115 EAST RIM DIVIDE 7930 .1 2.0 5 20.0 16.0 125 ELKHART PARK G.S. 9400 13.3 3.7 359 20.2 18.9 107 GROS VENTRE SUMMIT 8750 15.7 4.1 383 23.5 17.6 134 GUNSIGHT PASS 9820 -M -M * 28.0 -M * KENDALL R.S. 7740 2.3 .0 * 23.2 18.6 125 LOOMIS PARK 8240 14.5 2.8 518 30.5 22.4 136 NEW FORK LAKE 8340 3.6 .0 * 16.8 15.8 106 POCKET CREEK 9360 14.4 -M * 22.1 -M * SNIDER BASIN 8060 11.0 .0 * 26.6 20.4 130 SPRING CREEK DIVIDE 9000 42.5 15.7 271 44.6 33.0 135 TRIPLE PEAK 8500 33.3 5.6 595 47.2 31.8 148 ----- ----- Basin wide percent of average 356 128 LOWER GREEN RIVER HAMS FORK 7840 .3 .0 * 22.8 16.9 135 HEWINTA 9519 11.7 .7 1671* 28.5 20.2 141 HICKERSON PARK 9145 .4 .1 400* 18.6 12.5 149 HOLE-IN-ROCK 9150 1.3 .1 1300* 20.4 12.2 167 INDIAN CREEK 9425 38.5 15.3 252 38.3 32.4 118 KELLEY R.S. 8180 17.4 1.9 916 33.5 26.1 128 STEEL CREEK PARK 10200 29.2 12.3 237 33.1 23.1 143 ----- ----- Basin wide percent of average 325* 136 UPPER BEAR RIVER BUG LAKE 7950 30.3 3.0 1010 41.7 25.1 166 HAYDEN FORK 9212 16.7 1.6 1044* 42.8 28.4 151 KELLEY R.S. 8180 17.4 1.9 916 33.5 26.1 128 LILY LAKE 9156 22.0 1.6 1375 34.1 24.0 142 MONTE CRISTO 8960 49.5 13.2 375 53.9 34.0 159 SALT RIVER SUMMIT 7760 9.7 .0 * 29.6 24.0 123 TRIAL LAKE 9992 51.1 15.1 338 47.9 33.2 144 ----- ----- Basin wide percent of average 540 146 ----------------------------------------------------------------------------- -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.