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: MAY 16 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 18.0 6.1 295 33.9 25.7 132 COTTONWOOD CREEK 7670 33.5 13.4 250 46.9 34.0 138 GRAND TARGHEE 9260 -M -M * 45.9 -M * GRANITE CREEK 6770 19.7 7.5 263 33.0 23.6 140 GRASSY LAKE 7265 43.3 25.9 167 55.0 43.0 128 GROS VENTRE SUMMIT 8750 19.2 9.6 200 22.5 16.5 136 GUNSIGHT PASS 9820 -M -M * 25.6 -M * LEWIS LAKE DIVIDE 7850 53.4 28.4 188 49.2 43.6 113 PHILLIPS BENCH 8200 41.9 23.6 178 45.7 34.9 131 SALT RIVER SUMMIT 7760 14.8 4.4 336 27.8 22.9 121 SNAKE RIVER STATION 6920 -M 5.2 * 35.4 27.0 131 SPRING CREEK DIVIDE 9000 42.9 24.2 177 41.8 31.7 132 THUMB DIVIDE 7980 22.1 9.3 238 28.7 23.5 122 TOGWOTEE PASS 9580 41.4 27.2 152 42.9 30.9 139 TWO OCEAN PLATEAU 9240 52.5 30.5 172 43.0 34.2 126 WILLOW CREEK 8380 45.3 24.7 183 55.1 40.3 137 ----- ----- Basin wide percent of average 191 130 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 33.4 25.4 131 33.4 25.3 132 BLACK BEAR 8170 55.3 36.1 153 58.3 48.2 121 CANYON 7870 17.7 6.8 260 24.9 19.1 130 FISHER CREEK 9100 52.1 36.3 144 52.4 44.3 118 MADISON PLATEAU 7750 34.0 19.1 178 41.3 32.2 128 NORTHEAST ENTRANCE 7350 7.6 2.9 262 21.1 16.1 131 PARKER PEAK 9400 39.5 23.8 166 -M 21.3 * SYLVAN LAKE 8420 29.2 20.0 146 38.7 26.7 145 THUMB DIVIDE 7980 22.1 9.3 238 28.7 23.5 122 TWO OCEAN PLATEAU 9240 52.5 30.5 172 43.0 34.2 126 WHISKEY CREEK 6800 18.6 9.3 200 30.9 25.7 120 WHITE MILL 8700 36.8 24.4 151 38.1 33.2 115 WOLVERINE 7650 9.7 2.8 346 19.9 16.8 118 ----- ----- Basin wide percent of average 166 125 WIND RIVER BURROUGHS CREEK 8750 22.8 10.1 226 26.4 21.0 126 CASTLE CREEK 8400 1.6 -M * 12.5 -M * COLD SPRINGS 9630 8.5 3.1 274 14.6 15.6 94 DEER PARK 9700 20.6 17.0 121 27.2 29.0 94 HOBBS PARK 10100 18.8 16.4 115 19.1 19.1 100 LITTLE WARM 9370 17.3 7.4 234 20.5 18.5 111 SOUTH PASS 9040 15.3 13.6 113 17.7 24.6 72 ST. LAWRENCE ALT 8620 1.1 3.4 32 13.4 13.8 97 TOGWOTEE PASS 9580 41.4 27.2 152 42.9 30.9 139 TOWNSEND CREEK 8700 4.6 5.4 85 14.9 17.3 86 ----- ----- Basin wide percent of average 145 104 BIGHORN BASIN BALD MTN. 9380 33.0 22.8 145 27.8 23.5 118 BEAR TRAP MEADOW 8200 9.3 .6 1550 14.5 12.6 115 BLACKWATER 9780 39.2 28.8 136 37.6 26.8 140 BONE SPRINGS DIV 9350 27.6 16.0 173 24.4 20.4 120 EVENING STAR 9200 41.5 32.2 129 46.8 32.1 146 GRAVE SPRINGS 8550 10.6 7.3 145 13.8 14.7 94 KIRWIN 9550 16.7 10.8 155 20.0 15.9 126 MARQUETTE 8760 9.0 -M * 13.3 15.9 84 MIDDLE POWDER 7760 14.3 10.6 135 15.3 17.6 87 OWL CREEK 8975 3.4 2.1 162 10.7 9.6 111 POWDER RIVER PASS 9480 20.6 7.8 264 26.0 17.8 146 SHELL CREEK 9580 24.4 16.1 152 23.7 18.8 126 SYLVAN LAKE 8420 29.2 20.0 146 38.7 26.7 145 SYLVAN ROAD 7120 7.6 2.5 304 28.9 21.9 132 TIMBER CREEK 7950 3.6 2.1 171 11.5 12.5 92 YOUNTS PEAK 8350 24.0 15.0 160 24.1 20.4 118 ----- ----- Basin wide percent of average 157 123 SHOSHONE RIVER BLACKWATER 9780 39.2 28.8 136 37.6 26.8 140 EVENING STAR 9200 41.5 32.2 129 46.8 32.1 146 KIRWIN 9550 16.7 10.8 155 20.0 15.9 126 MARQUETTE 8760 9.0 -M * 13.3 15.9 84 SYLVAN LAKE 8420 29.2 20.0 146 38.7 26.7 145 SYLVAN ROAD 7120 7.6 2.5 304 28.9 21.9 132 YOUNTS PEAK 8350 24.0 15.0 160 24.1 20.4 118 ----- ----- Basin wide percent of average 145 131 POWDER-TONGUE BEAR TRAP MEADOW 8200 9.3 .6 1550 14.5 12.6 115 BIG GOOSE 7990 11.8 8.9 133 17.0 14.9 114 BONE SPRINGS DIV 9350 27.6 16.0 173 24.4 20.4 120 BURGESS JUNCTION 7880 14.5 9.7 149 18.4 17.1 108 CLOUD PEAK RESERVOIR 9860 21.0 14.6 144 22.6 19.5 116 DOME LAKE 8880 17.8 10.0 178 20.8 18.9 110 GRAVE SPRINGS 8550 10.6 7.3 145 13.8 14.7 94 HANSEN SAWMILL 8360 8.5 1.9 447 14.1 12.5 113 LITTLE GOOSE 8870 14.8 -M * 21.5 -M * MIDDLE POWDER 7760 14.3 10.6 135 15.3 17.6 87 POWDER RIVER PASS 9480 20.6 7.8 264 26.0 17.8 146 SOLDIER PARK 8720 10.3 -M * 14.6 -M * SUCKER CREEK 8880 18.4 9.8 188 23.0 19.7 117 TIE CREEK 6870 5.4 1.2 450 16.0 15.5 103 ----- ----- Basin wide percent of average 183 112 BELLE FOURCHE BLIND PARK 6890 3.7 .0 * 22.9 16.0 143 COLE CANYON 5910 2.7 .7 386* 18.1 11.3 160 NORTH RAPID CREEK 6130 .0 .5 0* 17.9 12.8 140 ----- ----- Basin wide percent of average 533* 147 UPPER N. PLATTE RIVER CINNABAR PARK 9574 31.1 10.4 299 43.1 25.5 169 COLUMBINE 9160 32.5 12.4 262 45.3 30.8 147 DIVIDE PEAK 8880 28.5 12.2 234 38.3 26.0 147 ELK RIVER 8700 22.6 7.0 323 35.0 24.6 142 JOE WRIGHT 10120 49.9 23.6 211 49.9 32.6 153 NORTH FRENCH CREEK 10130 61.4 32.9 187 61.6 32.2 191 OLD BATTLE 10000 57.4 35.1 164 62.4 42.3 148 SAGE CREEK BASIN 7850 6.2 7.1 87 24.3 15.1 161 SOUTH BRUSH CREEK 8440 17.6 6.2 284 31.6 22.0 144 TOWER 10500 74.0 51.3 144 68.5 47.9 143 WEBBER SPRINGS 9250 35.6 17.4 205 47.7 33.1 144 WILLOW CREEK PASS 9540 25.6 10.8 237 26.4 17.2 153 ----- ----- Basin wide percent of average 195 153 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 39.9 22.5 177 42.3 29.3 144 CASPER MTN. 7900 10.3 11.2 92 19.9 22.0 90 DEADMAN HILL 10220 30.6 17.8 172 32.3 23.0 140 DEER PARK 9700 20.6 17.0 121 27.2 29.0 94 LAPRELE CREEK 8375 10.1 3.4 297 19.5 18.4 106 RENO HILL 8400 17.3 9.2 188 24.7 22.7 109 ROACH 9700 26.4 13.0 203 32.7 24.5 133 SAND LAKE 10050 50.1 35.2 142 48.7 32.0 152 SOUTH PASS 9040 15.3 13.6 113 17.7 24.6 72 WINDY PEAK 7900 5.2 1.5 347 17.9 15.3 117 ----- ----- Basin wide percent of average 156 117 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M .3 * 22.4 19.9 113 DIVIDE PEAK 8880 28.5 12.2 234 38.3 26.0 147 OLD BATTLE 10000 57.4 35.1 164 62.4 42.3 148 SANDSTONE RS 8150 15.3 3.4 450 34.2 23.5 146 WHISKEY PARK 8950 -M 26.0 * 54.9 36.1 152 ----- ----- Basin wide percent of average 200 144 UPPER GREEN RIVER BIG SANDY OPENING 9080 16.5 8.6 192 20.6 17.3 119 BLIND BULL SUM 8650 44.1 24.6 179 31.2 26.7 117 EAST RIM DIVIDE 7930 7.4 8.8 84 18.7 15.0 125 ELKHART PARK G.S. 9400 16.3 9.1 179 18.7 17.5 107 GROS VENTRE SUMMIT 8750 19.2 9.6 200 22.5 16.5 136 GUNSIGHT PASS 9820 -M -M * 25.6 -M * KENDALL R.S. 7740 9.5 3.2 297 22.1 17.6 126 LOOMIS PARK 8240 20.4 9.3 219 29.4 21.2 139 NEW FORK LAKE 8340 8.9 3.5 254 15.7 14.6 108 POCKET CREEK 9360 14.6 -M * 19.5 -M * SNIDER BASIN 8060 16.7 7.2 232 24.5 19.5 126 SPRING CREEK DIVIDE 9000 42.9 24.2 177 41.8 31.7 132 TRIPLE PEAK 8500 37.3 16.5 226 44.8 30.4 147 ----- ----- Basin wide percent of average 192 127 LOWER GREEN RIVER HAMS FORK 7840 5.8 .7 829* 19.8 15.9 125 HEWINTA 9519 11.7 4.1 285 24.7 19.1 129 HICKERSON PARK 9145 .0 1.9 0 14.7 11.4 129 HOLE-IN-ROCK 9150 2.4 1.5 160 16.5 11.0 150 INDIAN CREEK 9425 37.5 23.3 161 34.6 31.1 111 KELLEY R.S. 8180 19.1 8.7 220 30.5 24.9 122 STEEL CREEK PARK 10200 26.3 17.9 147 28.8 21.7 133 ----- ----- Basin wide percent of average 177 126 UPPER BEAR RIVER BUG LAKE 7950 31.6 10.3 307 36.9 23.8 155 HAYDEN FORK 9212 20.3 6.9 294 39.2 26.9 146 KELLEY R.S. 8180 19.1 8.7 220 30.5 24.9 122 LILY LAKE 9156 22.0 6.0 367 30.4 22.7 134 MONTE CRISTO 8960 46.4 22.1 210 47.8 32.3 148 SALT RIVER SUMMIT 7760 14.8 4.4 336 27.8 22.9 121 TRIAL LAKE 9992 49.8 22.8 218 44.1 31.5 140 ----- ----- Basin wide percent of average 251 139 ----------------------------------------------------------------------------- -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.