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 MONDAY: OCTOBER 22 , 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 .5 420* 4.9 2.1 233 GRANITE CREEK 6770 1.4 .3 467* 4.0 1.2 333 GRASSY LAKE 7265 1.5 .8 188* 5.9 2.4 246 GROS VENTRE SUMMIT 8750 1.8 .9 200* 3.9 1.3 300 LEWIS LAKE DIVIDE 7850 1.5 .6 250* 5.7 2.2 259 PHILLIPS BENCH 8200 1.7 .7 243* 4.8 1.7 282 SALT RIVER SUMMIT 7600 .2 .2 100* 2.3 1.4 164 SNAKE RIVER STATION 6920 .6 .2 300* 4.6 1.6 287 SPRING CREEK DIVIDE 9000 1.9 .8 237* 3.2 1.8 178 THUMB DIVIDE 7980 1.1 .4 275* 4.2 1.4 300 TOGWOTEE PASS 9580 4.6 1.7 271* 5.4 2.0 270 TWO OCEAN PLATEAU 9240 5.8 2.0 290* 6.0 2.2 273 WILLOW CREEK 8450 3.0 1.0 300* 6.3 2.6 242 ----- ----- Basin wide percent of average 273* 256 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 4.4 1.9 232* 4.3 1.5 287 BLACK BEAR 8170 3.8 1.7 224* 5.9 2.4 246 CANYON 8090 1.3 .4 325* 3.9 1.3 300 FISHER CREEK 9100 -M 1.7 * 6.6 2.3 287 MADISON PLATEAU 7750 1.7 .9 189* 4.6 1.8 256 NORTHEAST ENTRANCE 7350 .3 .2 150* 3.2 1.1 291 PARKER PEAK 9400 -M 1.8 * 5.2 1.6 325 SYLVAN LAKE 8420 2.1 1.4 150* 5.6 1.8 311 THUMB DIVIDE 7980 1.1 .4 275* 4.2 1.4 300 TWO OCEAN PLATEAU 9240 5.8 2.0 290* 6.0 2.2 273 WHISKEY CREEK 6800 1.0 .4 250* 4.3 1.6 269 WHITE MILL 8700 -M 1.3 * 4.7 1.9 247 WOLVERINE 7650 .9 .3 300* 3.1 1.3 238 ----- ----- Basin wide percent of average 233* 277 WIND RIVER BURROUGHS CREEK 8750 1.9 .6 317* 3.7 1.2 308 COLD SPRINGS 9630 .3 .6 50* 2.3 1.4 164 DEER PARK 9700 1.3 1.6 81* 3.1 1.8 172 HOBBS PARK 10100 1.4 1.4 100* 2.8 1.5 187 LITTLE WARM 9370 1.1 .7 157* 3.0 1.2 250 SOUTH PASS 9040 .2 .9 22* 2.4 1.5 160 ST. LAWRENCE ALT 8620 .0 .4 0* 1.3 1.2 108 TOGWOTEE PASS 9580 4.6 1.7 271* 5.4 2.0 270 TOWNSEND CREEK 8700 .1 .6 17* 2.6 1.5 173 ----- ----- Basin wide percent of average 128* 200 BIGHORN BASIN BALD MTN. 9380 2.9 2.0 145* 3.1 1.7 182 BEAR TRAP MEADOW 8200 .6 .4 150* 1.8 1.2 150 BLACKWATER 9780 4.9 2.2 223* 4.6 1.9 242 BONE SPRINGS DIV 9350 2.1 1.9 111 3.8 1.8 211 EVENING STAR 9200 4.2 1.9 221* -M 2.0 * GRAVE SPRINGS 8550 1.2 .6 200* 2.5 1.5 167 KIRWIN 9550 3.3 1.3 254* 4.7 1.3 362 MARQUETTE 8760 .8 1.4 57 2.8 1.6 175 MIDDLE POWDER 7760 2.4 .9 267* 2.4 1.8 133 OWL CREEK 8975 .6 .5 120* 2.4 .8 300 POWDER RIVER PASS 9480 1.2 .8 150* 2.9 1.4 207 SHELL CREEK 9580 3.6 2.1 171 -M 1.4 * SYLVAN LAKE 8420 2.1 1.4 150* 5.6 1.8 311 SYLVAN ROAD 7120 .6 .3 200* -M 1.5 * TIMBER CREEK 7950 .4 .5 80* 3.1 1.2 258 YOUNTS PEAK 8350 2.0 .9 222* -M 1.3 * ----- ----- Basin wide percent of average 172* 221 SHOSHONE RIVER BLACKWATER 9780 4.9 2.2 223* 4.6 1.9 242 EVENING STAR 9200 4.2 1.9 221* -M 2.0 * KIRWIN 9550 3.3 1.3 254* 4.7 1.3 362 MARQUETTE 8760 .8 1.4 57 2.8 1.6 175 SYLVAN LAKE 8420 2.1 1.4 150* 5.6 1.8 311 SYLVAN ROAD 7120 .6 .3 200* -M 1.5 * YOUNTS PEAK 8350 2.0 .9 222* -M 1.3 * ----- ----- Basin wide percent of average 190* 268 POWDER-TONGUE BEAR TRAP MEADOW 8200 .6 .4 150* 1.8 1.2 150 BIG GOOSE 7990 1.8 .5 360* 3.8 1.5 253 BONE SPRINGS DIV 9350 2.1 1.9 111 3.8 1.8 211 BURGESS JUNCTION 7880 1.5 1.0 150* 3.2 1.6 200 CLOUD PEAK RESERVOIR 9860 3.0 .9 333* 4.6 1.8 256 DOME LAKE 8880 1.9 1.2 158* 4.3 1.8 239 GRAVE SPRINGS 8550 1.2 .6 200* 2.5 1.5 167 HANSEN SAWMILL 8360 1.2 .5 240* 2.6 1.3 200 MIDDLE POWDER 7760 2.4 .9 267* 2.4 1.8 133 POWDER RIVER PASS 9480 1.2 .8 150* 2.9 1.4 207 SUCKER CREEK 8880 1.8 .9 200* 3.2 1.7 188 TIE CREEK 6870 .4 .4 100* 2.8 1.8 156 ----- ----- Basin wide percent of average 191* 197 BELLE FOURCHE BLIND PARK 6890 .2 .2 100* 1.4 1.8 78 COLE CANYON 5910 .0 .4 0* .8 -M * NORTH RAPID CREEK 6130 .0 .3 0* 1.0 1.8 56 ----- ----- Basin wide percent of average 22* 67 UPPER N. PLATTE RIVER COLUMBINE 9160 .4 .4 100* 3.3 1.7 194 DIVIDE PEAK 8860 1.4 1.2 117* -M 1.9 * ELK RIVER 8700 .0 .3 0* 2.9 1.6 181 JOE WRIGHT 10120 2.1 1.6 131* 4.7 2.4 196 NORTH FRENCH CREEK 10130 2.3 2.2 105* 3.7 2.4 154 OLD BATTLE 9920 2.5 2.0 125* 3.8 2.5 152 SAGE CREEK BASIN 7850 .4 .6 67* 2.2 1.1 200 SOUTH BRUSH CREEK 8440 1.2 .4 300* 3.0 1.8 167 TOWER 10500 2.8 2.1 133* 4.6 2.8 164 WEBBER SPRINGS 9250 1.4 1.1 127* 3.4 2.2 155 WILLOW CREEK PASS 9540 2.0 .7 286* 2.9 1.4 207 ----- ----- Basin wide percent of average 131* 173 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10220 1.0 1.5 67* 2.5 1.8 139 CASPER MTN. 7850 1.5 1.1 136* 3.2 1.8 178 DEADMAN HILL 10220 2.1 1.5 140* 3.2 1.8 178 DEER PARK 9700 1.3 1.6 81* 3.1 1.8 172 LAPRELE CREEK 8375 .6 .6 100* 2.0 1.4 143 RENO HILL 8500 2.0 1.2 167* 3.4 1.8 189 ROACH 9700 1.9 .7 271* 3.0 1.6 188 SAND LAKE 10050 3.5 2.2 159* 4.0 2.2 182 SOUTH PASS 9040 .2 .9 22* 2.4 1.5 160 WINDY PEAK 7900 .6 .3 200* 1.6 1.2 133 ----- ----- Basin wide percent of average 127* 168 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .4 .2 200* 1.8 1.4 129 DIVIDE PEAK 8860 1.4 1.2 117* -M 1.9 * OLD BATTLE 9920 2.5 2.0 125* 3.8 2.5 152 SANDSTONE RS 8150 .3 .3 100* 2.2 1.6 138 WHISKEY PARK 8950 1.3 1.0 130* 3.7 2.0 185 ----- ----- Basin wide percent of average 126* 153 UPPER GREEN RIVER BIG SANDY OPENING 9080 .6 .8 75* 1.8 1.3 138 BLIND BULL SUM 8900 1.8 1.0 180* 3.1 1.6 194 EAST RIM DIVIDE 7930 .3 .3 100* 1.9 .9 211 ELKHART PARK G.S. 9400 .8 .5 160* 2.0 1.4 143 GROS VENTRE SUMMIT 8750 1.8 .9 200* 3.9 1.3 300 KENDALL R.S. 7740 .6 .3 200* 2.3 1.1 209 LOOMIS PARK 8240 .9 .5 180* 2.3 1.3 177 NEW FORK LAKE 8340 .6 .2 300* 1.9 1.1 173 SNIDER BASIN 8060 .3 .4 75* 1.7 1.2 142 SPRING CREEK DIVIDE 9000 1.9 .8 237* 3.2 1.8 178 TRIPLE PEAK 8500 1.4 .7 200* 4.3 1.6 269 ----- ----- Basin wide percent of average 172* 195 LOWER GREEN RIVER HAMS FORK 7840 .1 .2 50* 1.5 1.0 150 HEWINTA 9500 .0 .6 0* 4.2 1.7 247 HICKERSON PARK 9100 .2 .2 100* 2.6 1.2 217 HOLE-IN-ROCK 9150 .1 .2 50* 3.3 1.2 275 INDIAN CREEK 9425 1.5 .9 167* 2.5 1.8 139 KELLEY R.S. 8180 .6 .5 120* 2.7 1.5 180 STEEL CREEK PARK 10100 3.7 1.2 308* 4.6 1.6 287 ----- ----- Basin wide percent of average 163* 214 UPPER BEAR RIVER BUG LAKE 7950 .2 .8 25* 1.1 1.6 69 HAYDEN FORK 9100 .6 .6 100* 3.3 1.7 194 KELLEY R.S. 8180 .6 .5 120* 2.7 1.5 180 LILY LAKE 9050 .5 .6 83* 3.4 1.7 200 MONTE CRISTO 8960 .8 1.1 73* 3.1 2.0 155 SALT RIVER SUMMIT 7600 .2 .2 100* 2.3 1.4 164 TRIAL LAKE 9960 1.3 1.3 100* 2.6 2.0 130 ----- ----- Basin wide percent of average 82* 155 ----------------------------------------------------------------------------- -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.