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: OCTOBER 21 , 2007 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 1.2 .3 400* -M 1.4 * COTTONWOOD CREEK 7600 2.1 .4 525* 4.9 2.0 245 GRANITE CREEK 6770 1.5 .3 500* 4.0 1.2 333 GRASSY LAKE 7265 1.5 .7 214* 5.8 2.3 252 GROS VENTRE SUMMIT 8750 2.0 .9 222* 3.7 1.2 308 LEWIS LAKE DIVIDE 7850 1.5 .5 300* 5.4 2.1 257 PHILLIPS BENCH 8200 1.8 .7 257* 4.7 1.6 294 SALT RIVER SUMMIT 7600 .4 .1 400* 2.4 1.3 185 SNAKE RIVER STATION 6920 .6 .2 300* 4.6 1.5 307 SPRING CREEK DIVIDE 9000 2.0 .8 250* 3.1 1.7 182 THUMB DIVIDE 7980 1.1 .4 275* 4.2 1.4 300 TOGWOTEE PASS 9580 4.6 1.6 287* 5.4 1.9 284 TWO OCEAN PLATEAU 9240 5.8 1.9 305* 6.0 2.1 286 WILLOW CREEK 8450 3.1 .9 344* -M 2.5 * ----- ----- Basin wide percent of average 301* 267 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 4.2 1.8 233* 4.1 1.4 293 BLACK BEAR 8170 3.8 1.5 253* 5.8 2.3 252 CANYON 8090 1.3 .4 325* -M 1.2 * FISHER CREEK 9100 -M 1.6 * 6.5 2.2 295 MADISON PLATEAU 7750 1.7 .9 189* 4.4 1.7 259 NORTHEAST ENTRANCE 7350 .1 .2 50* 3.2 1.0 320 PARKER PEAK 9400 -M 1.7 * 5.1 1.5 340 SYLVAN LAKE 8420 2.0 1.3 154* 5.5 1.7 324 THUMB DIVIDE 7980 1.1 .4 275* 4.2 1.4 300 TWO OCEAN PLATEAU 9240 5.8 1.9 305* 6.0 2.1 286 WHISKEY CREEK 6800 1.0 .3 333* 4.2 1.5 280 WHITE MILL 8700 -M 1.2 * -M 1.8 * WOLVERINE 7650 .9 .2 450* 2.9 1.2 242 ----- ----- Basin wide percent of average 246* 288 WIND RIVER BURROUGHS CREEK 8750 1.9 .5 380* 3.6 1.1 327 COLD SPRINGS 9630 .3 .5 60* 2.2 1.3 169 DEER PARK 9700 1.2 1.5 80* 3.1 1.7 182 HOBBS PARK 10100 1.4 1.3 108* 2.8 1.4 200 LITTLE WARM 9370 1.1 .6 183* 3.0 1.2 250 SOUTH PASS 9040 .4 .8 50* 2.3 1.4 164 ST. LAWRENCE ALT 8620 .2 .4 50* 1.4 1.2 117 TOGWOTEE PASS 9580 4.6 1.6 287* 5.4 1.9 284 TOWNSEND CREEK 8700 .3 .6 50* 2.5 1.4 179 ----- ----- Basin wide percent of average 146* 209 BIGHORN BASIN BALD MTN. 9380 2.9 2.0 145* 3.1 1.6 194 BEAR TRAP MEADOW 8200 .6 .3 200* 1.7 1.2 142 BLACKWATER 9780 4.8 2.1 229* 4.4 1.8 244 BONE SPRINGS DIV 9350 1.9 1.8 106* 3.6 1.7 212 EVENING STAR 9200 4.1 1.8 228* -M 1.9 * GRAVE SPRINGS 8550 1.1 .6 183* 2.3 1.4 164 KIRWIN 9550 -M 1.2 * 4.2 1.2 350 MARQUETTE 8760 .8 1.3 62 2.7 1.5 180 MIDDLE POWDER 7760 2.4 .8 300* 2.3 1.7 135 OWL CREEK 8975 .6 .5 120* 2.4 .8 300 POWDER RIVER PASS 9480 1.2 .8 150* 2.9 1.3 223 SHELL CREEK 9580 3.6 2.0 180 -M 1.4 * SYLVAN LAKE 8420 2.0 1.3 154* 5.5 1.7 324 SYLVAN ROAD 7120 .6 .2 300* -M 1.4 * TIMBER CREEK 7950 .4 .5 80* 3.1 1.1 282 YOUNTS PEAK 8350 1.9 .9 211* -M 1.2 * ----- ----- Basin wide percent of average 171* 225 SHOSHONE RIVER BLACKWATER 9780 4.8 2.1 229* 4.4 1.8 244 EVENING STAR 9200 4.1 1.8 228* -M 1.9 * KIRWIN 9550 -M 1.2 * 4.2 1.2 350 MARQUETTE 8760 .8 1.3 62 2.7 1.5 180 SYLVAN LAKE 8420 2.0 1.3 154* 5.5 1.7 324 SYLVAN ROAD 7120 .6 .2 300* -M 1.4 * YOUNTS PEAK 8350 1.9 .9 211* -M 1.2 * ----- ----- Basin wide percent of average 187* 271 POWDER-TONGUE BEAR TRAP MEADOW 8200 .6 .3 200* 1.7 1.2 142 BIG GOOSE 7990 -M .5 * -M 1.4 * BONE SPRINGS DIV 9350 1.9 1.8 106* 3.6 1.7 212 BURGESS JUNCTION 7880 1.4 1.0 140* 2.9 1.5 193 CLOUD PEAK RESERVOIR 9860 2.6 .8 325* 4.4 1.7 259 DOME LAKE 8880 1.9 1.1 173* 4.1 1.7 241 GRAVE SPRINGS 8550 1.1 .6 183* 2.3 1.4 164 HANSEN SAWMILL 8360 1.2 .4 300* 2.6 1.2 217 MIDDLE POWDER 7760 2.4 .8 300* 2.3 1.7 135 POWDER RIVER PASS 9480 1.2 .8 150* 2.9 1.3 223 SUCKER CREEK 8880 1.7 .8 212* 3.0 1.6 188 TIE CREEK 6870 .4 .3 133* 2.7 1.7 159 ----- ----- Basin wide percent of average 189* 195 BELLE FOURCHE BLIND PARK 6890 .2 .2 100* 1.4 1.7 82 COLE CANYON 5910 .0 .3 0* .8 -M * NORTH RAPID CREEK 6130 .0 .2 0* 1.0 1.7 59 ----- ----- Basin wide percent of average 29* 71 UPPER N. PLATTE RIVER COLUMBINE 9160 .4 .3 133* 3.3 1.6 206 DIVIDE PEAK 8860 .9 1.1 82* -M 1.8 * ELK RIVER 8700 .0 .3 0* 2.6 1.5 173 JOE WRIGHT 10120 1.9 1.5 127* 4.3 2.3 187 NORTH FRENCH CREEK 10130 1.7 2.1 81* 3.0 2.3 130 OLD BATTLE 9920 1.9 1.8 106* 3.5 2.4 146 SAGE CREEK BASIN 7850 .4 .5 80* 1.9 1.0 190 SOUTH BRUSH CREEK 8440 .8 .4 200* 2.3 1.7 135 TOWER 10500 2.8 2.0 140* 4.2 2.6 162 WEBBER SPRINGS 9250 .8 1.0 80* 2.9 2.1 138 WILLOW CREEK PASS 9540 1.9 .6 317* 2.6 1.4 186 ----- ----- Basin wide percent of average 116* 162 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10220 .6 1.4 43* 1.9 1.7 112 CASPER MTN. 7850 1.0 1.0 100* 2.7 1.7 159 DEADMAN HILL 10220 1.7 1.4 121* 2.6 1.7 153 DEER PARK 9700 1.2 1.5 80* 3.1 1.7 182 LAPRELE CREEK 8375 .1 .6 17* 1.5 1.3 115 RENO HILL 8500 .9 1.1 82* 2.3 1.7 135 ROACH 9700 1.4 .7 200* 2.6 1.5 173 SAND LAKE 10050 2.7 2.0 135* 3.3 2.1 157 SOUTH PASS 9040 .4 .8 50* 2.3 1.4 164 WINDY PEAK 7900 .3 .3 100* 1.0 1.2 83 ----- ----- Basin wide percent of average 95* 146 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .4 .2 200* 1.6 1.3 123 DIVIDE PEAK 8860 .9 1.1 82* -M 1.8 * OLD BATTLE 9920 1.9 1.8 106* 3.5 2.4 146 SANDSTONE RS 8150 .1 .3 33* 1.7 1.5 113 WHISKEY PARK 8950 1.0 1.0 100* 3.3 1.9 174 ----- ----- Basin wide percent of average 98* 142 UPPER GREEN RIVER BIG SANDY OPENING 9080 .7 .7 100* 1.9 1.2 158 BLIND BULL SUM 8900 1.9 .9 211* 3.1 1.5 207 EAST RIM DIVIDE 7930 .3 .2 150* 2.0 .9 222 ELKHART PARK G.S. 9400 .8 .4 200* 2.0 1.3 154 GROS VENTRE SUMMIT 8750 2.0 .9 222* 3.7 1.2 308 KENDALL R.S. 7740 .7 .2 350* 2.3 1.0 230 LOOMIS PARK 8240 1.1 .5 220* 2.4 1.2 200 NEW FORK LAKE 8340 .7 .2 350* 2.0 1.0 200 SNIDER BASIN 8060 .3 .3 100* 1.7 1.1 155 SPRING CREEK DIVIDE 9000 2.0 .8 250* 3.1 1.7 182 TRIPLE PEAK 8500 1.6 .6 267* 4.4 1.5 293 ----- ----- Basin wide percent of average 212* 210 LOWER GREEN RIVER HAMS FORK 7840 .2 .2 100* 1.5 1.0 150 HEWINTA 9500 .1 .6 17* 4.1 1.6 256 HICKERSON PARK 9100 .4 .2 200* 2.7 1.2 225 HOLE-IN-ROCK 9150 .1 .2 50* 3.3 1.1 300 INDIAN CREEK 9425 1.6 .8 200* 2.6 1.7 153 KELLEY R.S. 8180 .7 .5 140* 2.7 1.4 193 STEEL CREEK PARK 10100 3.7 1.1 336* 4.4 1.5 293 ----- ----- Basin wide percent of average 189* 224 UPPER BEAR RIVER BUG LAKE 7950 .3 .8 37* 1.1 1.5 73 HAYDEN FORK 9100 .8 .6 133* 3.2 1.6 200 KELLEY R.S. 8180 .7 .5 140* 2.7 1.4 193 LILY LAKE 9050 .5 .6 83* 3.4 1.6 212 MONTE CRISTO 8960 .9 1.1 82* 3.0 1.9 158 SALT RIVER SUMMIT 7600 .4 .1 400* 2.4 1.3 185 TRIAL LAKE 9960 1.2 1.2 100* 2.2 1.9 116 ----- ----- Basin wide percent of average 98* 161 ----------------------------------------------------------------------------- -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.