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 THURSDAY: MAY 5 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 25.3 10.8 234 31.1 24.7 126 COTTONWOOD CREEK 7670 36.9 18.3 202 45.3 32.5 139 GRAND TARGHEE 9260 62.7 -M * 45.9 -M * GRANITE CREEK 6770 24.9 11.5 217 29.8 22.7 131 GRASSY LAKE 7265 49.1 31.7 155 51.5 41.5 124 GROS VENTRE SUMMIT 8750 18.4 12.5 147 19.2 15.6 123 GUNSIGHT PASS 9820 24.1 -M * 21.9 -M * LEWIS LAKE DIVIDE 7850 55.2 33.3 166 46.2 42.2 109 PHILLIPS BENCH 8200 40.6 28.3 143 41.9 33.6 125 SALT RIVER SUMMIT 7760 20.7 9.2 225 26.8 21.9 122 SNAKE RIVER STATION 6920 -M 10.5 * 33.1 25.9 128 SPRING CREEK DIVIDE 9000 44.5 27.9 159 40.5 30.6 132 THUMB DIVIDE 7980 28.6 13.6 210 27.0 22.4 121 TOGWOTEE PASS 9580 38.0 28.1 135 39.5 29.5 134 TWO OCEAN PLATEAU 9240 -M 31.7 * -M 32.7 * WILLOW CREEK 8380 48.6 29.5 165 52.8 38.4 138 ----- ----- Basin wide percent of average 169 127 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 33.4 26.0 128 32.1 24.0 134 BLACK BEAR 8170 56.4 39.2 144 55.8 46.5 120 CANYON 7870 21.3 10.1 211 23.6 18.1 130 FISHER CREEK 9100 51.7 37.6 138 48.9 42.6 115 MADISON PLATEAU 7750 37.8 23.1 164 39.7 30.9 128 NORTHEAST ENTRANCE 7350 16.3 5.9 276 19.7 15.2 130 PARKER PEAK 9400 38.3 24.5 156 32.5 20.0 163 SYLVAN LAKE 8420 32.9 23.0 143 36.7 25.2 146 THUMB DIVIDE 7980 28.6 13.6 210 27.0 22.4 121 TWO OCEAN PLATEAU 9240 -M 31.7 * -M 32.7 * WHISKEY CREEK 6800 24.5 13.8 178 29.3 24.6 119 WHITE MILL 8700 36.2 26.2 138 35.8 31.8 113 WOLVERINE 7650 16.7 6.2 269 18.7 15.6 120 ----- ----- Basin wide percent of average 158 126 WIND RIVER BURROUGHS CREEK 8750 20.7 12.6 164 21.8 19.8 110 CASTLE CREEK 8400 5.8 -M * 10.5 -M * COLD SPRINGS 9630 8.8 4.6 191 11.7 14.4 81 DEER PARK 9700 22.4 17.2 130 26.3 27.5 96 HOBBS PARK 10100 19.5 17.7 110 17.4 17.5 99 LITTLE WARM 9370 15.3 10.0 153 16.6 17.3 96 SOUTH PASS 9040 19.7 17.2 115 17.3 23.3 74 ST. LAWRENCE ALT 8620 2.7 5.4 50 9.8 12.6 78 TOGWOTEE PASS 9580 38.0 28.1 135 39.5 29.5 134 TOWNSEND CREEK 8700 9.2 8.0 115 13.8 16.0 86 ----- ----- Basin wide percent of average 129 98 BIGHORN BASIN BALD MTN. 9380 32.5 23.5 138 26.3 21.9 120 BEAR TRAP MEADOW 8200 11.5 1.9 605 12.7 11.4 111 BLACKWATER 9780 36.8 28.7 128 34.8 25.3 138 BONE SPRINGS DIV 9350 28.6 17.8 161 23.0 18.9 122 EVENING STAR 9200 41.6 33.2 125 44.5 30.5 146 GRAVE SPRINGS 8550 12.3 10.4 118 12.8 13.7 93 KIRWIN 9550 16.8 12.7 132 17.6 14.7 120 MARQUETTE 8760 7.2 -M * 10.4 14.3 73 MIDDLE POWDER 7760 14.8 13.6 109 14.6 16.3 90 OWL CREEK 8975 6.6 3.6 183 9.1 8.6 106 POWDER RIVER PASS 9480 20.9 9.8 213 24.2 16.3 148 SHELL CREEK 9580 24.6 16.6 148 22.1 17.4 127 SYLVAN LAKE 8420 32.9 23.0 143 36.7 25.2 146 SYLVAN ROAD 7120 15.8 7.0 226 27.0 20.9 129 TIMBER CREEK 7950 6.0 4.5 133 8.2 11.0 75 YOUNTS PEAK 8350 23.6 17.8 133 21.0 19.2 109 ----- ----- Basin wide percent of average 145 121 SHOSHONE RIVER BLACKWATER 9780 36.8 28.7 128 34.8 25.3 138 EVENING STAR 9200 41.6 33.2 125 44.5 30.5 146 KIRWIN 9550 16.8 12.7 132 17.6 14.7 120 MARQUETTE 8760 7.2 -M * 10.4 14.3 73 SYLVAN LAKE 8420 32.9 23.0 143 36.7 25.2 146 SYLVAN ROAD 7120 15.8 7.0 226 27.0 20.9 129 YOUNTS PEAK 8350 23.6 17.8 133 21.0 19.2 109 ----- ----- Basin wide percent of average 137 128 POWDER-TONGUE BEAR TRAP MEADOW 8200 11.5 1.9 605 12.7 11.4 111 BIG GOOSE 7990 13.4 11.0 122 15.5 13.5 115 BONE SPRINGS DIV 9350 28.6 17.8 161 23.0 18.9 122 BURGESS JUNCTION 7880 16.1 12.6 128 17.0 15.9 107 CLOUD PEAK RESERVOIR 9860 22.3 16.0 139 21.0 17.8 118 DOME LAKE 8880 19.7 12.6 156 19.2 17.4 110 GRAVE SPRINGS 8550 12.3 10.4 118 12.8 13.7 93 HANSEN SAWMILL 8360 10.6 4.2 252 12.1 11.4 106 LITTLE GOOSE 8870 15.7 -M * 20.0 -M * MIDDLE POWDER 7760 14.8 13.6 109 14.6 16.3 90 POWDER RIVER PASS 9480 20.9 9.8 213 24.2 16.3 148 SOLDIER PARK 8720 12.0 -M * 13.2 -M * SUCKER CREEK 8880 19.2 12.2 157 21.3 18.0 118 TIE CREEK 6870 8.9 3.4 262 14.8 14.0 106 ----- ----- Basin wide percent of average 158 113 BELLE FOURCHE BLIND PARK 6890 10.7 3.4 315 21.8 14.7 148 COLE CANYON 5910 8.7 3.2 272 16.6 10.1 164 NORTH RAPID CREEK 6130 5.3 2.4 221 17.3 11.8 147 ----- ----- Basin wide percent of average 274 152 UPPER N. PLATTE RIVER CINNABAR PARK 9574 30.2 15.1 200 37.1 24.1 154 COLUMBINE 9160 -M 19.1 * 44.5 29.6 150 DIVIDE PEAK 8880 32.5 17.9 182 37.1 24.8 150 ELK RIVER 8700 30.7 13.0 236 34.4 23.5 146 JOE WRIGHT 10120 49.0 25.1 195 48.4 30.8 157 NORTH FRENCH CREEK 10130 63.2 34.5 183 -M 30.4 * OLD BATTLE 10000 57.4 37.3 154 47.3 40.6 117 SAGE CREEK BASIN 7850 17.8 10.4 171 24.1 14.4 167 SOUTH BRUSH CREEK 8440 25.2 9.9 255 30.9 20.7 149 TOWER 10500 73.3 52.4 140 -M 46.0 * WEBBER SPRINGS 9250 39.8 23.7 168 46.5 31.7 147 WILLOW CREEK PASS 9540 27.0 13.8 196 25.0 16.1 155 ----- ----- Basin wide percent of average 176 146 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 42.5 27.5 155 38.1 27.7 138 CASPER MTN. 7900 13.9 16.1 86 18.9 20.3 93 DEADMAN HILL 10220 31.9 19.6 163 31.1 21.5 145 DEER PARK 9700 22.4 17.2 130 26.3 27.5 96 LAPRELE CREEK 8375 14.8 6.1 243 18.2 17.0 107 RENO HILL 8400 19.0 13.6 140 22.7 20.9 109 ROACH 9700 28.6 17.6 163 31.7 23.0 138 SAND LAKE 10050 50.4 37.0 136 43.7 30.1 145 SOUTH PASS 9040 19.7 17.2 115 17.3 23.3 74 WINDY PEAK 7900 9.6 3.9 246 17.0 14.0 121 ----- ----- Basin wide percent of average 144 118 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 3.5 * 22.2 19.0 117 DIVIDE PEAK 8880 32.5 17.9 182 37.1 24.8 150 OLD BATTLE 10000 57.4 37.3 154 47.3 40.6 117 SANDSTONE RS 8150 23.2 7.9 294 34.0 22.3 152 WHISKEY PARK 8950 -M 30.0 * 54.0 34.6 156 ----- ----- Basin wide percent of average 179 138 UPPER GREEN RIVER BIG SANDY OPENING 9080 19.1 12.4 154 19.7 16.3 121 BLIND BULL SUM 8650 44.1 27.2 162 28.9 25.6 113 EAST RIM DIVIDE 7930 16.1 12.3 131 16.8 14.2 118 ELKHART PARK G.S. 9400 17.9 12.1 148 17.6 16.4 107 GROS VENTRE SUMMIT 8750 18.4 12.5 147 19.2 15.6 123 GUNSIGHT PASS 9820 24.1 -M * 21.9 -M * KENDALL R.S. 7740 13.7 8.4 163 19.6 16.8 117 LOOMIS PARK 8240 25.2 13.2 191 26.7 20.3 132 NEW FORK LAKE 8340 14.7 7.3 201 14.2 13.7 104 POCKET CREEK 9360 17.2 -M * 18.6 -M * SNIDER BASIN 8060 23.9 11.5 208 23.2 18.8 123 SPRING CREEK DIVIDE 9000 44.5 27.9 159 40.5 30.6 132 TRIPLE PEAK 8500 41.8 22.3 187 42.9 29.1 147 ----- ----- Basin wide percent of average 167 124 LOWER GREEN RIVER HAMS FORK 7840 17.1 4.7 364 19.1 15.1 126 HEWINTA 9519 18.3 8.0 229 23.4 18.2 129 HICKERSON PARK 9145 4.0 4.7 85 13.1 10.5 125 HOLE-IN-ROCK 9150 9.0 3.9 231 14.9 10.1 148 INDIAN CREEK 9425 40.6 27.3 149 33.7 29.9 113 KELLEY R.S. 8180 25.7 12.8 201 29.8 24.0 124 STEEL CREEK PARK 10200 25.5 18.9 135 27.3 20.7 132 ----- ----- Basin wide percent of average 175 126 UPPER BEAR RIVER BUG LAKE 7950 -M 16.2 * -M 22.8 * HAYDEN FORK 9212 -M 11.5 * 38.1 25.6 149 KELLEY R.S. 8180 25.7 12.8 201 29.8 24.0 124 LILY LAKE 9156 27.5 9.8 281 29.1 21.5 135 MONTE CRISTO 8960 49.2 27.0 182 47.0 30.9 152 SALT RIVER SUMMIT 7760 20.7 9.2 225 26.8 21.9 122 TRIAL LAKE 9992 47.6 26.0 183 42.8 30.0 143 ----- ----- Basin wide percent of average 201 139 ----------------------------------------------------------------------------- -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.