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: OCTOBER 20 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 .0 .2 0 1.8 1.1 164 COTTONWOOD CREEK 7670 .2 .3 67 3.1 1.6 194 GRAND TARGHEE 9260 4.2 -M * 3.7 -M * GRANITE CREEK 6770 .2 .1 200 1.8 .9 200 GRASSY LAKE 7265 .2 .5 40 2.2 1.8 122 GROS VENTRE SUMMIT 8750 1.8 .7 257 1.8 1.1 164 GUNSIGHT PASS 9820 1.6 -M * 2.6 -M * LEWIS LAKE DIVIDE 7850 .5 .3 167 2.4 1.6 150 PHILLIPS BENCH 8200 .0 .5 0 2.0 1.2 167 SALT RIVER SUMMIT 7760 .0 .0 100 2.2 1.1 200 SNAKE RIVER STATION 6920 .1 .1 100 1.8 1.3 138 SPRING CREEK DIVIDE 9000 2.9 .6 483 3.4 1.3 262 THUMB DIVIDE 7980 .1 .3 33 3.1 1.2 258 TOGWOTEE PASS 9580 3.2 1.4 229 3.0 1.5 200 TWO OCEAN PLATEAU 9240 3.0 1.6 188 2.3 1.7 135 WILLOW CREEK 8380 1.6 .7 229 4.3 2.1 205 ----- ----- Basin wide percent of average 189 181 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 2.5 1.6 156 2.0 1.1 182 BLACK BEAR 8170 2.8 1.0 280 4.2 1.8 233 CANYON 7870 .4 .3 133 1.9 .9 211 FISHER CREEK 9100 2.9 1.2 242 3.0 1.8 167 MADISON PLATEAU 7750 1.5 .6 250 3.8 1.4 271 NORTHEAST ENTRANCE 7350 .0 .1 0 1.7 .9 189 PARKER PEAK 9400 2.8 1.7 165 2.0 1.4 143 SYLVAN LAKE 8420 .0 1.0 0 1.7 1.5 113 THUMB DIVIDE 7980 .1 .3 33 3.1 1.2 258 TWO OCEAN PLATEAU 9240 3.0 1.6 188 2.3 1.7 135 WHISKEY CREEK 6800 .0 .2 0 2.6 1.2 217 WHITE MILL 8700 2.4 .9 267 2.3 1.5 153 WOLVERINE 7650 .0 .2 0 1.3 1.1 118 ----- ----- Basin wide percent of average 172 182 WIND RIVER BURROUGHS CREEK 8750 2.4 .4 600 2.2 .9 244 COLD SPRINGS 9630 1.8 .5 360 2.3 1.0 230 DEER PARK 9700 2.8 1.0 280 3.7 1.3 285 HOBBS PARK 10100 3.2 1.3 246 2.9 1.2 242 LITTLE WARM 9370 1.4 .6 233 2.0 1.0 200 SOUTH PASS 9040 2.5 .6 417 3.2 1.1 291 ST. LAWRENCE ALT 8620 1.0 .4 250 2.5 1.0 250 TOGWOTEE PASS 9580 3.2 1.4 229 3.0 1.5 200 TOWNSEND CREEK 8700 2.1 .6 350 2.9 1.3 223 ----- ----- Basin wide percent of average 300 240 BIGHORN BASIN BALD MTN. 9380 2.4 1.8 133 2.2 1.5 147 BEAR TRAP MEADOW 8200 .7 .4 175 1.7 1.0 170 BLACKWATER 9780 2.9 2.0 145 2.4 1.5 160 BONE SPRINGS DIV 9350 1.6 1.6 100 1.9 1.5 127 EVENING STAR 9200 2.9 1.5 193 3.3 1.5 220 GRAVE SPRINGS 8550 1.5 .7 214 2.3 1.4 164 KIRWIN 9550 2.2 1.1 200 1.8 1.0 180 MARQUETTE 8760 2.3 1.3 177 2.3 1.4 164 MIDDLE POWDER 7760 1.9 .9 211 2.5 1.6 156 OWL CREEK 8975 2.1 .6 350 1.7 .7 243 POWDER RIVER PASS 9480 1.5 .7 214 1.7 1.2 142 SHELL CREEK 9580 2.4 1.8 133 1.8 1.2 150 SYLVAN LAKE 8420 .0 1.0 0 1.7 1.5 113 SYLVAN ROAD 7120 .0 .2 0 1.3 1.0 130 TIMBER CREEK 7950 .9 .7 129 1.8 .9 200 YOUNTS PEAK 8350 1.0 .7 143 1.6 1.1 145 ----- ----- Basin wide percent of average 155 160 SHOSHONE RIVER BLACKWATER 9780 2.9 2.0 145 2.4 1.5 160 EVENING STAR 9200 2.9 1.5 193 3.3 1.5 220 KIRWIN 9550 2.2 1.1 200 1.8 1.0 180 MARQUETTE 8760 2.3 1.3 177 2.3 1.4 164 SYLVAN LAKE 8420 .0 1.0 0 1.7 1.5 113 SYLVAN ROAD 7120 .0 .2 0 1.3 1.0 130 YOUNTS PEAK 8350 1.0 .7 143 1.6 1.1 145 ----- ----- Basin wide percent of average 145 160 POWDER-TONGUE BEAR TRAP MEADOW 8200 .7 .4 175 1.7 1.0 170 BIG GOOSE 7990 .6 .5 120 1.9 1.4 136 BONE SPRINGS DIV 9350 1.6 1.6 100 1.9 1.5 127 BURGESS JUNCTION 7880 1.5 .9 167 2.1 1.4 150 CLOUD PEAK RESERVOIR 9860 1.6 .8 200 2.5 1.6 156 DOME LAKE 8880 1.3 1.1 118 2.3 1.5 153 GRAVE SPRINGS 8550 1.5 .7 214 2.3 1.4 164 HANSEN SAWMILL 8360 .8 .4 200 1.7 1.1 155 MIDDLE POWDER 7760 1.9 .9 211 2.5 1.6 156 POWDER RIVER PASS 9480 1.5 .7 214 1.7 1.2 142 SUCKER CREEK 8880 1.6 .8 200 2.0 1.5 133 TIE CREEK 6870 .0 .4 0 2.4 1.6 150 ----- ----- Basin wide percent of average 159 149 BELLE FOURCHE BLIND PARK 6890 .0 .2 0 2.2 1.5 147 COLE CANYON 5910 .0 .4 0 3.1 1.1 282 NORTH RAPID CREEK 6130 .0 .2 0 2.1 1.5 140 ----- ----- Basin wide percent of average 0 180 UPPER N. PLATTE RIVER COLUMBINE 9160 .1 .1 100 2.6 1.2 217 DIVIDE PEAK 8880 .1 .9 11 2.7 1.6 169 ELK RIVER 8700 .1 .2 50 2.1 1.3 162 JOE WRIGHT 10120 .9 1.2 75 2.3 2.0 115 NORTH FRENCH CREEK 10130 5.0 1.8 278 5.2 1.8 289 OLD BATTLE 10000 4.9 1.5 327 5.4 1.9 284 SAGE CREEK BASIN 7850 .0 .5 0 2.0 .9 222 SOUTH BRUSH CREEK 8440 .1 .3 33 3.1 1.5 207 TOWER 10500 5.2 1.4 371 5.5 2.0 275 WEBBER SPRINGS 9250 1.6 .8 200 4.0 1.7 235 WILLOW CREEK PASS 9540 .3 .5 60 1.4 1.1 127 ----- ----- Basin wide percent of average 199 214 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 3.6 1.1 327 -M 1.3 * CASPER MTN. 7900 .1 .9 11 2.1 1.4 150 DEADMAN HILL 10220 .3 1.2 25 2.6 1.4 186 DEER PARK 9700 2.8 1.0 280 3.7 1.3 285 LAPRELE CREEK 8375 .0 .4 0 1.9 1.0 190 RENO HILL 8400 .5 1.0 50 2.1 1.4 150 ROACH 9700 1.4 .4 350 2.8 1.3 215 SAND LAKE 10050 4.9 1.7 288 4.9 1.7 288 SOUTH PASS 9040 2.5 .6 417 3.2 1.1 291 WINDY PEAK 7900 .3 .2 150 2.1 1.0 210 ----- ----- Basin wide percent of average 193 219 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .1 .1 100 1.2 1.0 120 DIVIDE PEAK 8880 .1 .9 11 2.7 1.6 169 OLD BATTLE 10000 4.9 1.5 327 5.4 1.9 284 SANDSTONE RS 8150 -M .2 * 1.4 1.3 108 WHISKEY PARK 8950 1.1 .8 138 4.0 1.7 235 ----- ----- Basin wide percent of average 188 196 UPPER GREEN RIVER BIG SANDY OPENING 9080 2.8 .6 467 2.9 1.0 290 BLIND BULL SUM 8650 2.0 .6 333 1.9 1.2 158 EAST RIM DIVIDE 7930 .1 .2 50 1.8 .8 225 ELKHART PARK G.S. 9400 2.1 .3 700 2.3 1.1 209 GROS VENTRE SUMMIT 8750 1.8 .7 257 1.8 1.1 164 GUNSIGHT PASS 9820 1.6 -M * 2.6 -M * KENDALL R.S. 7740 .2 .1 200 1.9 .9 211 LOOMIS PARK 8240 .3 .3 100 1.9 1.0 190 NEW FORK LAKE 8340 .0 .1 0 1.7 .9 189 SNIDER BASIN 8060 1.0 .3 333 2.4 .8 300 SPRING CREEK DIVIDE 9000 2.9 .6 483 3.4 1.3 262 TRIPLE PEAK 8500 1.9 .4 475 3.5 1.2 292 ----- ----- Basin wide percent of average 360 226 LOWER GREEN RIVER HAMS FORK 7840 .5 .1 500 2.5 .8 312 HEWINTA 9519 .0 .5 0 1.0 1.4 71 HICKERSON PARK 9145 .1 .1 100 .9 1.0 90 HOLE-IN-ROCK 9150 .0 .1 0 1.0 1.0 100 INDIAN CREEK 9425 4.2 .6 700 4.3 1.3 331 KELLEY R.S. 8180 1.2 .3 400 3.2 1.1 291 STEEL CREEK PARK 10200 1.0 .9 111 1.1 1.3 85 ----- ----- Basin wide percent of average 269 177 UPPER BEAR RIVER BUG LAKE 7950 .4 .6 67 2.4 1.3 185 HAYDEN FORK 9212 .1 .5 20 1.9 1.4 136 KELLEY R.S. 8180 1.2 .3 400 3.2 1.1 291 LILY LAKE 9156 .2 .6 33 1.1 1.4 79 MONTE CRISTO 8960 .9 .9 100 2.4 1.6 150 SALT RIVER SUMMIT 7760 .0 .0 100 2.2 1.1 200 TRIAL LAKE 9992 2.0 1.0 200 2.4 1.5 160 ----- ----- Basin wide percent of average 123 166 ----------------------------------------------------------------------------- -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 1961-90. 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.