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 SATURDAY: APRIL 30 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 25.9 12.6 206 30.8 24.3 127 COTTONWOOD CREEK 7670 37.4 20.1 186 45.2 31.8 142 GRAND TARGHEE 9260 62.1 -M * 45.2 -M * GRANITE CREEK 6770 25.7 13.2 195 29.8 22.3 134 GRASSY LAKE 7265 49.3 33.7 146 51.5 40.7 127 GROS VENTRE SUMMIT 8750 18.6 13.4 139 19.1 15.2 126 GUNSIGHT PASS 9820 23.7 -M * 21.9 -M * LEWIS LAKE DIVIDE 7850 55.1 34.8 158 44.5 41.5 107 PHILLIPS BENCH 8200 40.4 29.6 136 41.5 33.0 126 SALT RIVER SUMMIT 7760 21.1 11.0 192 26.8 21.5 125 SNAKE RIVER STATION 6920 -M 12.6 * 33.1 25.4 130 SPRING CREEK DIVIDE 9000 44.5 28.7 155 40.4 30.1 134 THUMB DIVIDE 7980 29.4 15.3 192 26.9 21.9 123 TOGWOTEE PASS 9580 37.7 27.9 135 39.2 28.8 136 TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.0 * WILLOW CREEK 8380 48.7 30.9 158 52.7 37.5 141 ----- ----- Basin wide percent of average 160 129 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 33.1 25.9 128 31.8 23.4 136 BLACK BEAR 8170 57.7 40.1 144 54.6 45.7 119 CANYON 7870 21.6 11.5 188 23.3 17.6 132 FISHER CREEK 9100 51.3 37.8 136 -M 41.7 * MADISON PLATEAU 7750 37.9 24.4 155 39.7 30.3 131 NORTHEAST ENTRANCE 7350 17.1 7.4 231 19.6 14.7 133 PARKER PEAK 9400 38.3 24.5 156 -M 19.4 * SYLVAN LAKE 8420 33.0 23.9 138 36.5 24.6 148 THUMB DIVIDE 7980 29.4 15.3 192 26.9 21.9 123 TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.0 * WHISKEY CREEK 6800 24.7 15.4 160 29.2 24.1 121 WHITE MILL 8700 36.0 26.4 136 35.5 31.1 114 WOLVERINE 7650 17.4 7.4 235 18.4 15.1 122 ----- ----- Basin wide percent of average 153 127 WIND RIVER BURROUGHS CREEK 8750 20.6 13.8 149 21.5 19.2 112 CASTLE CREEK 8400 7.0 -M * 10.5 -M * COLD SPRINGS 9630 9.6 4.9 196 11.5 13.8 83 DEER PARK 9700 22.0 19.0 116 26.0 26.8 97 HOBBS PARK 10100 19.0 18.0 106 16.8 16.8 100 LITTLE WARM 9370 15.5 11.3 137 16.4 16.7 98 SOUTH PASS 9040 19.2 18.1 106 16.9 22.6 75 ST. LAWRENCE ALT 8620 3.8 6.3 60 9.7 12.0 81 TOGWOTEE PASS 9580 37.7 27.9 135 39.2 28.8 136 TOWNSEND CREEK 8700 9.1 9.2 99 13.4 15.4 87 ----- ----- Basin wide percent of average 122 100 BIGHORN BASIN BALD MTN. 9380 31.2 23.5 133 25.4 21.2 120 BEAR TRAP MEADOW 8200 11.3 2.7 419 12.3 10.8 114 BLACKWATER 9780 36.7 28.7 128 34.6 24.6 141 BONE SPRINGS DIV 9350 27.5 18.3 150 22.1 18.2 121 EVENING STAR 9200 41.3 33.2 124 -M 29.8 * GRAVE SPRINGS 8550 11.9 11.1 107 12.4 13.0 95 KIRWIN 9550 16.8 13.0 129 17.5 14.1 124 MARQUETTE 8760 6.8 -M * 9.7 13.6 71 MIDDLE POWDER 7760 14.3 14.5 99 14.0 15.7 89 OWL CREEK 8975 7.6 4.1 185 8.9 8.1 110 POWDER RIVER PASS 9480 20.4 10.9 187 23.5 15.7 150 SHELL CREEK 9580 23.9 16.9 141 21.5 16.7 129 SYLVAN LAKE 8420 33.0 23.9 138 36.5 24.6 148 SYLVAN ROAD 7120 17.9 8.4 213 27.0 20.4 132 TIMBER CREEK 7950 6.2 4.9 127 8.0 10.4 77 YOUNTS PEAK 8350 23.5 18.2 129 20.8 18.7 111 ----- ----- Basin wide percent of average 139 120 SHOSHONE RIVER BLACKWATER 9780 36.7 28.7 128 34.6 24.6 141 EVENING STAR 9200 41.3 33.2 124 -M 29.8 * KIRWIN 9550 16.8 13.0 129 17.5 14.1 124 MARQUETTE 8760 6.8 -M * 9.7 13.6 71 SYLVAN LAKE 8420 33.0 23.9 138 36.5 24.6 148 SYLVAN ROAD 7120 17.9 8.4 213 27.0 20.4 132 YOUNTS PEAK 8350 23.5 18.2 129 20.8 18.7 111 ----- ----- Basin wide percent of average 135 126 POWDER-TONGUE BEAR TRAP MEADOW 8200 11.3 2.7 419 12.3 10.8 114 BIG GOOSE 7990 12.8 11.7 109 14.9 12.8 116 BONE SPRINGS DIV 9350 27.5 18.3 150 22.1 18.2 121 BURGESS JUNCTION 7880 15.3 13.3 115 16.2 15.3 106 CLOUD PEAK RESERVOIR 9860 21.5 16.3 132 20.1 16.9 119 DOME LAKE 8880 18.8 13.7 137 18.4 16.7 110 GRAVE SPRINGS 8550 11.9 11.1 107 12.4 13.0 95 HANSEN SAWMILL 8360 10.5 5.0 210 11.9 10.9 109 LITTLE GOOSE 8870 15.2 -M * 19.3 -M * MIDDLE POWDER 7760 14.3 14.5 99 14.0 15.7 89 POWDER RIVER PASS 9480 20.4 10.9 187 23.5 15.7 150 SOLDIER PARK 8720 11.6 -M * 12.8 -M * SUCKER CREEK 8880 18.1 13.2 137 20.0 17.3 116 TIE CREEK 6870 8.4 4.2 200 14.1 13.4 105 ----- ----- Basin wide percent of average 141 113 BELLE FOURCHE BLIND PARK 6890 -M 4.0 * 21.2 14.1 150 COLE CANYON 5910 8.9 5.2 171 16.1 9.4 171 NORTH RAPID CREEK 6130 5.9 4.2 140 16.8 11.3 149 ----- ----- Basin wide percent of average 157 155 UPPER N. PLATTE RIVER CINNABAR PARK 9574 30.9 16.1 192 36.9 23.4 158 COLUMBINE 9160 41.1 21.3 193 44.0 29.0 152 DIVIDE PEAK 8880 31.8 19.6 162 36.5 24.2 151 ELK RIVER 8700 30.2 15.4 196 34.0 22.9 148 JOE WRIGHT 10120 47.8 25.1 190 48.0 29.9 161 NORTH FRENCH CREEK 10130 -M 34.5 * 60.0 29.5 203 OLD BATTLE 10000 56.8 36.8 154 47.3 39.7 119 SAGE CREEK BASIN 7850 19.0 11.4 167 23.9 14.0 171 SOUTH BRUSH CREEK 8440 24.9 11.3 220 30.3 20.0 152 TOWER 10500 72.4 52.1 139 47.7 44.9 106 WEBBER SPRINGS 9250 39.4 25.3 156 45.9 31.0 148 WILLOW CREEK PASS 9540 26.9 14.2 189 24.6 15.6 158 ----- ----- Basin wide percent of average 169 148 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 42.1 28.3 149 38.0 26.8 142 CASPER MTN. 7900 13.4 17.3 77 18.4 19.4 95 DEADMAN HILL 10220 31.2 19.6 159 30.7 20.8 148 DEER PARK 9700 22.0 19.0 116 26.0 26.8 97 LAPRELE CREEK 8375 14.7 7.4 199 17.7 16.3 109 RENO HILL 8400 18.4 15.0 123 21.9 20.0 110 ROACH 9700 28.1 18.6 151 31.3 22.3 140 SAND LAKE 10050 49.3 36.9 134 -M 29.1 * SOUTH PASS 9040 19.2 18.1 106 16.9 22.6 75 WINDY PEAK 7900 10.0 5.2 192 16.5 13.4 123 ----- ----- Basin wide percent of average 134 115 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 4.9 * 21.6 18.5 117 DIVIDE PEAK 8880 31.8 19.6 162 36.5 24.2 151 OLD BATTLE 10000 56.8 36.8 154 47.3 39.7 119 SANDSTONE RS 8150 23.0 9.8 235 33.5 21.8 154 WHISKEY PARK 8950 -M 30.6 * 52.5 33.6 156 ----- ----- Basin wide percent of average 169 139 UPPER GREEN RIVER BIG SANDY OPENING 9080 19.4 13.7 142 19.6 15.8 124 BLIND BULL SUM 8650 43.5 28.0 155 28.9 25.1 115 EAST RIM DIVIDE 7930 17.1 13.3 129 16.7 13.8 121 ELKHART PARK G.S. 9400 17.6 13.0 135 17.4 15.9 109 GROS VENTRE SUMMIT 8750 18.6 13.4 139 19.1 15.2 126 GUNSIGHT PASS 9820 23.7 -M * 21.9 -M * KENDALL R.S. 7740 14.6 10.3 142 19.5 16.5 118 LOOMIS PARK 8240 25.1 14.6 172 26.6 19.9 134 NEW FORK LAKE 8340 14.9 8.7 171 14.0 13.3 105 POCKET CREEK 9360 17.1 -M * 18.6 -M * SNIDER BASIN 8060 24.1 12.9 187 23.1 18.5 125 SPRING CREEK DIVIDE 9000 44.5 28.7 155 40.4 30.1 134 TRIPLE PEAK 8500 42.3 24.0 176 42.8 28.5 150 ----- ----- Basin wide percent of average 156 126 LOWER GREEN RIVER HAMS FORK 7840 17.5 6.3 278 18.9 14.7 129 HEWINTA 9519 17.5 9.5 184 22.9 17.7 129 HICKERSON PARK 9145 4.7 5.9 80 12.7 10.1 126 HOLE-IN-ROCK 9150 8.9 5.0 178 14.4 9.7 148 INDIAN CREEK 9425 40.3 28.5 141 33.6 29.3 115 KELLEY R.S. 8180 26.3 14.4 183 29.7 23.5 126 STEEL CREEK PARK 10200 24.7 18.6 133 26.8 20.1 133 ----- ----- Basin wide percent of average 159 127 UPPER BEAR RIVER BUG LAKE 7950 -M 18.4 * -M 22.3 * HAYDEN FORK 9212 -M 13.3 * 37.7 25.0 151 KELLEY R.S. 8180 26.3 14.4 183 29.7 23.5 126 LILY LAKE 9156 27.6 11.4 242 28.7 21.0 137 MONTE CRISTO 8960 48.9 28.5 172 46.5 30.1 154 SALT RIVER SUMMIT 7760 21.1 11.0 192 26.8 21.5 125 TRIAL LAKE 9992 47.1 26.5 178 42.3 29.3 144 ----- ----- Basin wide percent of average 186 141 ----------------------------------------------------------------------------- -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.