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 17 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 17.5 5.6 313 34.0 25.8 132 COTTONWOOD CREEK 7670 33.4 13.0 257 46.9 34.1 138 GRAND TARGHEE 9260 69.9 -M * -M -M * GRANITE CREEK 6770 19.3 7.1 272 33.1 23.7 140 GRASSY LAKE 7265 41.8 25.3 165 55.0 43.1 128 GROS VENTRE SUMMIT 8750 19.0 9.2 207 22.5 16.5 136 GUNSIGHT PASS 9820 -M -M * 25.8 -M * LEWIS LAKE DIVIDE 7850 52.4 27.9 188 49.2 43.7 113 PHILLIPS BENCH 8200 41.2 23.1 178 45.7 35.0 131 SALT RIVER SUMMIT 7760 14.4 3.9 369 27.8 23.0 121 SNAKE RIVER STATION 6920 -M 4.7 * 35.4 27.1 131 SPRING CREEK DIVIDE 9000 42.6 23.8 179 41.8 31.8 131 THUMB DIVIDE 7980 21.4 8.8 243 28.6 23.6 121 TOGWOTEE PASS 9580 41.4 27.0 153 43.0 31.0 139 TWO OCEAN PLATEAU 9240 52.3 30.3 173 43.0 34.4 125 WILLOW CREEK 8380 44.1 24.2 182 55.2 40.5 136 ----- ----- Basin wide percent of average 192 130 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 33.1 25.2 131 33.4 25.4 131 BLACK BEAR 8170 53.3 35.8 149 58.3 48.3 121 CANYON 7870 17.3 6.3 275 24.9 19.2 130 FISHER CREEK 9100 51.6 36.0 143 52.4 44.4 118 MADISON PLATEAU 7750 33.4 18.6 180 41.3 32.4 127 NORTHEAST ENTRANCE 7350 7.1 2.6 273 21.1 16.2 130 PARKER PEAK 9400 38.9 23.7 164 34.9 21.5 162 SYLVAN LAKE 8420 29.0 19.6 148 38.7 26.9 144 THUMB DIVIDE 7980 21.4 8.8 243 28.6 23.6 121 TWO OCEAN PLATEAU 9240 52.3 30.3 173 43.0 34.4 125 WHISKEY CREEK 6800 18.2 8.7 209 30.9 25.8 120 WHITE MILL 8700 36.5 24.2 151 38.1 33.3 114 WOLVERINE 7650 9.0 2.4 375 19.9 16.9 118 ----- ----- Basin wide percent of average 166 126 WIND RIVER BURROUGHS CREEK 8750 22.5 9.9 227 26.4 21.1 125 CASTLE CREEK 8400 1.2 -M * 12.6 -M * COLD SPRINGS 9630 8.1 2.9 279 14.6 15.7 93 DEER PARK 9700 20.4 16.7 122 27.2 29.1 93 HOBBS PARK 10100 18.6 16.3 114 19.1 19.2 99 LITTLE WARM 9370 17.1 7.1 241 20.6 18.6 111 SOUTH PASS 9040 15.0 13.0 115 17.7 24.7 72 ST. LAWRENCE ALT 8620 .0 3.1 0 13.4 13.9 96 TOGWOTEE PASS 9580 41.4 27.0 153 43.0 31.0 139 TOWNSEND CREEK 8700 3.9 5.2 75 14.8 17.4 85 ----- ----- Basin wide percent of average 145 103 BIGHORN BASIN BALD MTN. 9380 32.7 22.7 144 27.8 23.6 118 BEAR TRAP MEADOW 8200 8.8 .4 2200* 14.5 12.7 114 BLACKWATER 9780 39.1 28.7 136 37.5 26.9 139 BONE SPRINGS DIV 9350 27.2 15.7 173 24.4 20.5 119 EVENING STAR 9200 41.0 32.0 128 46.8 32.3 145 GRAVE SPRINGS 8550 10.2 6.7 152 13.9 14.8 94 KIRWIN 9550 16.4 10.6 155 20.0 16.0 125 MARQUETTE 8760 8.9 -M * 13.3 16.0 83 MIDDLE POWDER 7760 14.0 10.1 139 15.3 17.7 86 OWL CREEK 8975 2.8 2.0 140 10.7 9.7 110 POWDER RIVER PASS 9480 20.3 7.4 274 26.0 17.9 145 SHELL CREEK 9580 24.0 16.0 150 23.7 18.9 125 SYLVAN LAKE 8420 29.0 19.6 148 38.7 26.9 144 SYLVAN ROAD 7120 6.9 2.3 300 28.9 22.0 131 TIMBER CREEK 7950 3.0 2.0 150 11.5 12.6 91 YOUNTS PEAK 8350 23.7 14.6 162 24.1 20.5 118 ----- ----- Basin wide percent of average 157 122 SHOSHONE RIVER BLACKWATER 9780 39.1 28.7 136 37.5 26.9 139 EVENING STAR 9200 41.0 32.0 128 46.8 32.3 145 KIRWIN 9550 16.4 10.6 155 20.0 16.0 125 MARQUETTE 8760 8.9 -M * 13.3 16.0 83 SYLVAN LAKE 8420 29.0 19.6 148 38.7 26.9 144 SYLVAN ROAD 7120 6.9 2.3 300 28.9 22.0 131 YOUNTS PEAK 8350 23.7 14.6 162 24.1 20.5 118 ----- ----- Basin wide percent of average 145 130 POWDER-TONGUE BEAR TRAP MEADOW 8200 8.8 .4 2200* 14.5 12.7 114 BIG GOOSE 7990 11.3 8.7 130 17.0 15.0 113 BONE SPRINGS DIV 9350 27.2 15.7 173 24.4 20.5 119 BURGESS JUNCTION 7880 13.9 9.3 149 18.4 17.2 107 CLOUD PEAK RESERVOIR 9860 19.8 14.3 138 22.6 19.7 115 DOME LAKE 8880 17.1 9.6 178 20.8 19.0 109 GRAVE SPRINGS 8550 10.2 6.7 152 13.9 14.8 94 HANSEN SAWMILL 8360 7.8 1.8 433 14.0 12.6 111 LITTLE GOOSE 8870 14.2 -M * 21.5 -M * MIDDLE POWDER 7760 14.0 10.1 139 15.3 17.7 86 POWDER RIVER PASS 9480 20.3 7.4 274 26.0 17.9 145 SOLDIER PARK 8720 9.5 -M * 14.6 -M * SUCKER CREEK 8880 18.0 9.4 191 23.0 19.8 116 TIE CREEK 6870 4.6 1.2 383 16.0 15.6 103 ----- ----- Basin wide percent of average 183 112 BELLE FOURCHE BLIND PARK 6890 2.6 .0 * 23.0 16.2 142 COLE CANYON 5910 1.5 .5 300* 18.3 11.4 161 NORTH RAPID CREEK 6130 .0 .4 0* 18.0 12.9 140 ----- ----- Basin wide percent of average 456* 146 UPPER N. PLATTE RIVER CINNABAR PARK 9574 30.5 9.9 308 43.1 25.6 168 COLUMBINE 9160 31.7 11.7 271 45.4 30.9 147 DIVIDE PEAK 8880 27.1 11.6 234 38.2 26.1 146 ELK RIVER 8700 21.3 6.5 328 35.0 24.7 142 JOE WRIGHT 10120 49.7 23.4 212 49.9 32.8 152 NORTH FRENCH CREEK 10130 60.6 32.6 186 61.6 32.3 191 OLD BATTLE 10000 57.1 34.7 165 62.5 42.4 147 SAGE CREEK BASIN 7850 5.0 6.7 75 24.3 15.1 161 SOUTH BRUSH CREEK 8440 16.7 5.8 288 31.6 22.1 143 TOWER 10500 73.9 51.0 145 -M 48.0 * WEBBER SPRINGS 9250 35.0 16.7 210 47.6 33.2 143 WILLOW CREEK PASS 9540 25.0 10.4 240 26.4 17.3 153 ----- ----- Basin wide percent of average 196 154 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 39.3 21.9 179 42.3 29.4 144 CASPER MTN. 7900 9.5 10.7 89 19.8 22.1 90 DEADMAN HILL 10220 30.4 17.5 174 32.3 23.1 140 DEER PARK 9700 20.4 16.7 122 27.2 29.1 93 LAPRELE CREEK 8375 9.4 3.1 303 19.5 18.5 105 RENO HILL 8400 16.7 8.8 190 24.9 22.8 109 ROACH 9700 25.4 12.5 203 32.7 24.6 133 SAND LAKE 10050 49.7 34.9 142 48.8 32.2 152 SOUTH PASS 9040 15.0 13.0 115 17.7 24.7 72 WINDY PEAK 7900 4.4 1.4 314 17.8 15.4 116 ----- ----- Basin wide percent of average 157 117 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M .0 * 22.4 19.9 113 DIVIDE PEAK 8880 27.1 11.6 234 38.2 26.1 146 OLD BATTLE 10000 57.1 34.7 165 62.5 42.4 147 SANDSTONE RS 8150 13.3 3.1 429 34.2 23.6 145 WHISKEY PARK 8950 -M 25.4 * 54.9 36.2 152 ----- ----- Basin wide percent of average 197 143 UPPER GREEN RIVER BIG SANDY OPENING 9080 16.2 8.2 198 20.7 17.4 119 BLIND BULL SUM 8650 44.0 24.3 181 31.1 26.8 116 EAST RIM DIVIDE 7930 7.1 8.4 85 18.7 15.0 125 ELKHART PARK G.S. 9400 16.0 8.8 182 18.8 17.6 107 GROS VENTRE SUMMIT 8750 19.0 9.2 207 22.5 16.5 136 GUNSIGHT PASS 9820 -M -M * 25.8 -M * KENDALL R.S. 7740 9.1 2.7 337 22.3 17.7 126 LOOMIS PARK 8240 19.8 8.9 222 29.4 21.3 138 NEW FORK LAKE 8340 8.4 3.1 271 15.6 14.7 106 POCKET CREEK 9360 14.7 -M * 19.6 -M * SNIDER BASIN 8060 16.1 6.8 237 24.5 19.6 125 SPRING CREEK DIVIDE 9000 42.6 23.8 179 41.8 31.8 131 TRIPLE PEAK 8500 36.6 15.8 232 44.9 30.5 147 ----- ----- Basin wide percent of average 196 127 LOWER GREEN RIVER HAMS FORK 7840 5.5 .4 1375* 19.5 16.0 122 HEWINTA 9519 11.2 3.8 295 24.9 19.2 130 HICKERSON PARK 9145 .3 1.6 19 15.1 11.5 131 HOLE-IN-ROCK 9150 1.2 1.4 86 16.7 11.1 150 INDIAN CREEK 9425 36.5 22.9 159 34.6 31.2 111 KELLEY R.S. 8180 18.7 8.2 228 30.5 25.0 122 STEEL CREEK PARK 10200 26.1 17.6 148 29.1 21.8 133 ----- ----- Basin wide percent of average 178 125 UPPER BEAR RIVER BUG LAKE 7950 30.5 9.7 314 36.9 23.9 154 HAYDEN FORK 9212 19.8 6.5 305 39.4 27.0 146 KELLEY R.S. 8180 18.7 8.2 228 30.5 25.0 122 LILY LAKE 9156 21.8 5.6 389 30.7 22.8 135 MONTE CRISTO 8960 45.5 21.6 211 47.9 32.5 147 SALT RIVER SUMMIT 7760 14.4 3.9 369 27.8 23.0 121 TRIAL LAKE 9992 -M 22.4 * 44.3 31.6 140 ----- ----- Basin wide percent of average 272 139 ----------------------------------------------------------------------------- -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.