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 FRIDAY: APRIL 29 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 26.0 13.0 200 30.7 24.2 127 COTTONWOOD CREEK 7670 36.0 20.4 176 44.7 31.7 141 GRAND TARGHEE 9260 61.8 -M * 45.2 -M * GRANITE CREEK 6770 26.0 13.5 193 29.6 22.2 133 GRASSY LAKE 7265 49.1 34.1 144 51.3 40.6 126 GROS VENTRE SUMMIT 8750 18.4 13.6 135 18.9 15.1 125 GUNSIGHT PASS 9820 23.5 -M * 21.8 -M * LEWIS LAKE DIVIDE 7850 55.2 35.1 157 44.5 41.4 107 PHILLIPS BENCH 8200 40.3 29.8 135 41.4 32.9 126 SALT RIVER SUMMIT 7760 21.0 11.3 186 26.7 21.4 125 SNAKE RIVER STATION 6920 -M 13.0 * 33.0 25.3 130 SPRING CREEK DIVIDE 9000 44.4 28.7 155 40.0 30.0 133 THUMB DIVIDE 7980 29.5 15.6 189 26.8 21.8 123 TOGWOTEE PASS 9580 37.5 27.8 135 39.0 28.7 136 TWO OCEAN PLATEAU 9240 -M 31.8 * -M 31.8 * WILLOW CREEK 8380 48.1 31.0 155 51.9 37.3 139 ----- ----- Basin wide percent of average 158 128 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 33.1 25.9 128 31.6 23.3 136 BLACK BEAR 8170 57.5 40.3 143 54.5 45.5 120 CANYON 7870 21.5 11.6 185 23.3 17.6 132 FISHER CREEK 9100 51.0 37.8 135 -M 41.6 * MADISON PLATEAU 7750 37.9 24.6 154 39.7 30.2 131 NORTHEAST ENTRANCE 7350 17.0 7.6 224 19.5 14.7 133 PARKER PEAK 9400 38.2 24.5 156 -M 19.3 * SYLVAN LAKE 8420 32.9 23.9 138 36.4 24.5 149 THUMB DIVIDE 7980 29.5 15.6 189 26.8 21.8 123 TWO OCEAN PLATEAU 9240 -M 31.8 * -M 31.8 * WHISKEY CREEK 6800 24.7 15.6 158 29.1 24.0 121 WHITE MILL 8700 35.7 26.4 135 35.3 30.9 114 WOLVERINE 7650 17.4 7.6 229 18.1 15.0 121 ----- ----- Basin wide percent of average 152 127 WIND RIVER BURROUGHS CREEK 8750 20.7 13.9 149 21.6 19.1 113 CASTLE CREEK 8400 6.9 -M * 10.6 -M * COLD SPRINGS 9630 9.5 4.7 202 11.7 13.7 85 DEER PARK 9700 21.9 19.0 115 25.8 26.6 97 HOBBS PARK 10100 19.1 17.9 107 17.0 16.6 102 LITTLE WARM 9370 15.3 11.3 135 16.5 16.6 99 SOUTH PASS 9040 19.1 18.1 106 17.0 22.4 76 ST. LAWRENCE ALT 8620 4.1 6.3 65 9.8 11.9 82 TOGWOTEE PASS 9580 37.5 27.8 135 39.0 28.7 136 TOWNSEND CREEK 8700 9.3 9.3 100 13.3 15.2 88 ----- ----- Basin wide percent of average 122 101 BIGHORN BASIN BALD MTN. 9380 30.2 23.5 129 24.8 21.0 118 BEAR TRAP MEADOW 8200 11.0 2.7 407 11.9 10.7 111 BLACKWATER 9780 36.6 28.6 128 34.5 24.5 141 BONE SPRINGS DIV 9350 27.0 18.2 148 21.9 18.0 122 EVENING STAR 9200 41.5 33.2 125 -M 29.6 * GRAVE SPRINGS 8550 11.6 11.0 105 12.1 12.9 94 KIRWIN 9550 16.8 13.0 129 17.6 14.0 126 MARQUETTE 8760 6.8 -M * 9.8 13.4 73 MIDDLE POWDER 7760 13.8 14.6 95 14.0 15.6 90 OWL CREEK 8975 7.4 4.0 185 9.0 8.0 113 POWDER RIVER PASS 9480 19.8 11.0 180 23.0 15.6 147 SHELL CREEK 9580 23.3 16.9 138 20.9 16.5 127 SYLVAN LAKE 8420 32.9 23.9 138 36.4 24.5 149 SYLVAN ROAD 7120 17.9 8.7 206 26.9 20.3 133 TIMBER CREEK 7950 5.9 4.9 120 7.9 10.2 77 YOUNTS PEAK 8350 23.6 18.1 130 20.8 18.6 112 ----- ----- Basin wide percent of average 137 120 SHOSHONE RIVER BLACKWATER 9780 36.6 28.6 128 34.5 24.5 141 EVENING STAR 9200 41.5 33.2 125 -M 29.6 * KIRWIN 9550 16.8 13.0 129 17.6 14.0 126 MARQUETTE 8760 6.8 -M * 9.8 13.4 73 SYLVAN LAKE 8420 32.9 23.9 138 36.4 24.5 149 SYLVAN ROAD 7120 17.9 8.7 206 26.9 20.3 133 YOUNTS PEAK 8350 23.6 18.1 130 20.8 18.6 112 ----- ----- Basin wide percent of average 135 127 POWDER-TONGUE BEAR TRAP MEADOW 8200 11.0 2.7 407 11.9 10.7 111 BIG GOOSE 7990 12.4 11.9 104 14.5 12.6 115 BONE SPRINGS DIV 9350 27.0 18.2 148 21.9 18.0 122 BURGESS JUNCTION 7880 14.9 13.4 111 15.8 15.2 104 CLOUD PEAK RESERVOIR 9860 20.9 16.3 128 19.9 16.8 118 DOME LAKE 8880 18.4 13.7 134 18.0 16.5 109 GRAVE SPRINGS 8550 11.6 11.0 105 12.1 12.9 94 HANSEN SAWMILL 8360 10.1 5.0 202 11.5 10.8 106 LITTLE GOOSE 8870 14.6 -M * 18.9 -M * MIDDLE POWDER 7760 13.8 14.6 95 14.0 15.6 90 POWDER RIVER PASS 9480 19.8 11.0 180 23.0 15.6 147 SOLDIER PARK 8720 11.1 -M * 12.3 -M * SUCKER CREEK 8880 17.7 13.3 133 19.5 17.1 114 TIE CREEK 6870 8.2 4.2 195 13.8 13.2 105 ----- ----- Basin wide percent of average 137 112 BELLE FOURCHE BLIND PARK 6890 11.0 4.3 256 21.1 14.0 151 COLE CANYON 5910 8.6 5.4 159 15.7 9.2 171 NORTH RAPID CREEK 6130 6.0 4.7 128 16.8 11.1 151 ----- ----- Basin wide percent of average 178 156 UPPER N. PLATTE RIVER CINNABAR PARK 9574 31.0 16.3 190 36.9 23.3 158 COLUMBINE 9160 41.3 21.6 191 43.6 28.9 151 DIVIDE PEAK 8880 31.3 19.8 158 36.1 24.0 150 ELK RIVER 8700 29.9 15.8 189 33.7 22.8 148 JOE WRIGHT 10120 -M 25.0 * 46.8 29.7 158 NORTH FRENCH CREEK 10130 -M 34.4 * 61.6 29.3 210 OLD BATTLE 10000 57.4 36.6 157 47.3 39.5 120 SAGE CREEK BASIN 7850 19.1 11.5 166 23.8 13.9 171 SOUTH BRUSH CREEK 8440 24.9 11.5 217 29.8 19.9 150 TOWER 10500 71.9 52.0 138 47.7 44.7 107 WEBBER SPRINGS 9250 39.4 25.5 155 45.3 30.9 147 WILLOW CREEK PASS 9540 26.2 14.3 183 24.1 15.5 155 ----- ----- Basin wide percent of average 166 148 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 42.1 28.3 149 38.0 26.6 143 CASPER MTN. 7900 13.2 17.4 76 17.9 19.2 93 DEADMAN HILL 10220 30.4 19.6 155 29.8 20.7 144 DEER PARK 9700 21.9 19.0 115 25.8 26.6 97 LAPRELE CREEK 8375 14.4 7.6 189 17.8 16.2 110 RENO HILL 8400 18.1 15.2 119 21.8 19.9 110 ROACH 9700 27.8 18.6 149 30.9 22.2 139 SAND LAKE 10050 48.8 36.8 133 -M 29.0 * SOUTH PASS 9040 19.1 18.1 106 17.0 22.4 76 WINDY PEAK 7900 9.9 5.4 183 16.4 13.3 123 ----- ----- Basin wide percent of average 132 115 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 5.1 * 21.4 18.4 116 DIVIDE PEAK 8880 31.3 19.8 158 36.1 24.0 150 OLD BATTLE 10000 57.4 36.6 157 47.3 39.5 120 SANDSTONE RS 8150 22.7 10.2 223 33.1 21.7 153 WHISKEY PARK 8950 -M 30.6 * -M 33.5 * ----- ----- Basin wide percent of average 167 133 UPPER GREEN RIVER BIG SANDY OPENING 9080 19.1 13.9 137 19.6 15.7 125 BLIND BULL SUM 8650 43.7 28.1 156 28.8 25.0 115 EAST RIM DIVIDE 7930 17.1 13.4 128 16.7 13.8 121 ELKHART PARK G.S. 9400 17.6 13.1 134 17.4 15.8 110 GROS VENTRE SUMMIT 8750 18.4 13.6 135 18.9 15.1 125 GUNSIGHT PASS 9820 23.5 -M * 21.8 -M * KENDALL R.S. 7740 14.9 10.6 141 19.7 16.4 120 LOOMIS PARK 8240 25.4 14.8 172 26.5 19.8 134 NEW FORK LAKE 8340 14.9 9.0 166 14.1 13.2 107 POCKET CREEK 9360 17.4 -M * 18.6 -M * SNIDER BASIN 8060 24.2 13.1 185 23.1 18.4 126 SPRING CREEK DIVIDE 9000 44.4 28.7 155 40.0 30.0 133 TRIPLE PEAK 8500 42.2 24.3 174 42.4 28.4 149 ----- ----- Basin wide percent of average 154 126 LOWER GREEN RIVER HAMS FORK 7840 17.6 6.6 267 19.0 14.6 130 HEWINTA 9519 16.8 9.8 171 22.3 17.6 127 HICKERSON PARK 9145 4.7 6.2 76 12.8 10.0 128 HOLE-IN-ROCK 9150 8.8 5.2 169 14.3 9.6 149 INDIAN CREEK 9425 40.3 28.7 140 33.3 29.2 114 KELLEY R.S. 8180 26.2 14.7 178 29.6 23.4 126 STEEL CREEK PARK 10200 24.0 18.5 130 26.0 20.0 130 ----- ----- Basin wide percent of average 154 126 UPPER BEAR RIVER BUG LAKE 7950 36.6 18.8 195 36.1 22.2 163 HAYDEN FORK 9212 -M 13.6 * 37.2 24.9 149 KELLEY R.S. 8180 26.2 14.7 178 29.6 23.4 126 LILY LAKE 9156 27.1 11.7 232 28.3 20.9 135 MONTE CRISTO 8960 49.1 28.8 170 46.1 30.0 154 SALT RIVER SUMMIT 7760 21.0 11.3 186 26.7 21.4 125 TRIAL LAKE 9992 47.3 26.5 178 41.8 29.1 144 ----- ----- Basin wide percent of average 185 143 ----------------------------------------------------------------------------- -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.