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 23 , 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 14.9 174 30.5 23.7 129 COTTONWOOD CREEK 7670 35.5 22.2 160 43.2 30.8 140 GRAND TARGHEE 9260 59.7 -M * 44.8 -M * GRANITE CREEK 6770 26.3 15.2 173 29.5 21.7 136 GRASSY LAKE 7265 48.1 35.8 134 50.0 39.7 126 GROS VENTRE SUMMIT 8750 18.5 14.2 130 18.6 14.6 127 GUNSIGHT PASS 9820 23.2 -M * 21.4 -M * LEWIS LAKE DIVIDE 7850 53.5 36.2 148 43.9 40.5 108 PHILLIPS BENCH 8200 39.2 30.5 129 40.6 32.1 126 SALT RIVER SUMMIT 7760 20.4 13.0 157 26.1 20.9 125 SNAKE RIVER STATION 6920 -M 15.2 * 32.4 24.8 131 SPRING CREEK DIVIDE 9000 43.1 28.9 149 38.4 29.3 131 THUMB DIVIDE 7980 28.5 17.2 166 25.9 21.2 122 TOGWOTEE PASS 9580 37.0 27.4 135 38.4 27.9 138 TWO OCEAN PLATEAU 9240 -M 31.4 * -M 31.0 * WILLOW CREEK 8380 46.6 31.8 147 50.0 36.2 138 ----- ----- Basin wide percent of average 147 129 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 31.8 25.6 124 30.4 22.6 135 BLACK BEAR 8170 55.1 40.6 136 53.2 44.6 119 CANYON 7870 20.9 12.6 166 22.3 17.1 130 FISHER CREEK 9100 49.7 37.6 132 -M 40.5 * MADISON PLATEAU 7750 35.9 25.5 141 37.8 29.7 127 NORTHEAST ENTRANCE 7350 16.7 9.0 186 19.0 14.2 134 PARKER PEAK 9400 36.5 24.0 152 -M 18.6 * SYLVAN LAKE 8420 31.7 24.0 132 35.3 23.7 149 THUMB DIVIDE 7980 28.5 17.2 166 25.9 21.2 122 TWO OCEAN PLATEAU 9240 -M 31.4 * -M 31.0 * WHISKEY CREEK 6800 23.3 16.9 138 27.9 23.4 119 WHITE MILL 8700 34.9 26.2 133 34.6 30.1 115 WOLVERINE 7650 17.5 9.1 192 17.7 14.5 122 ----- ----- Basin wide percent of average 143 126 WIND RIVER BURROUGHS CREEK 8750 20.4 14.6 140 21.3 18.5 115 CASTLE CREEK 8400 8.4 -M * 10.2 -M * COLD SPRINGS 9630 10.0 5.4 185 11.4 13.0 88 DEER PARK 9700 21.8 18.6 117 25.4 25.5 100 HOBBS PARK 10100 18.7 17.3 108 16.4 15.8 104 LITTLE WARM 9370 15.5 11.9 130 16.0 15.8 101 SOUTH PASS 9040 19.6 17.8 110 16.6 21.5 77 ST. LAWRENCE ALT 8620 5.0 6.5 77 9.6 11.1 86 TOGWOTEE PASS 9580 37.0 27.4 135 38.4 27.9 138 TOWNSEND CREEK 8700 9.7 9.5 102 13.1 14.4 91 ----- ----- Basin wide percent of average 122 103 BIGHORN BASIN BALD MTN. 9380 29.8 22.7 131 24.1 20.2 119 BEAR TRAP MEADOW 8200 11.2 3.4 329 11.6 10.1 115 BLACKWATER 9780 35.9 27.5 131 33.9 23.7 143 BONE SPRINGS DIV 9350 26.1 17.7 147 21.2 17.2 123 EVENING STAR 9200 40.5 32.4 125 -M 28.8 * GRAVE SPRINGS 8550 10.9 11.0 99 11.4 12.3 93 KIRWIN 9550 16.5 12.7 130 17.0 13.3 128 MARQUETTE 8760 6.6 -M * 9.7 12.5 78 MIDDLE POWDER 7760 12.7 14.3 89 12.9 14.8 87 OWL CREEK 8975 8.1 4.3 188 8.6 7.5 115 POWDER RIVER PASS 9480 19.7 11.5 171 22.6 14.8 153 SHELL CREEK 9580 22.6 16.4 138 20.5 15.8 130 SYLVAN LAKE 8420 31.7 24.0 132 35.3 23.7 149 SYLVAN ROAD 7120 18.5 10.0 185 26.2 19.7 133 TIMBER CREEK 7950 6.6 5.1 129 7.9 9.4 84 YOUNTS PEAK 8350 23.1 18.2 127 20.4 18.1 113 ----- ----- Basin wide percent of average 136 122 SHOSHONE RIVER BLACKWATER 9780 35.9 27.5 131 33.9 23.7 143 EVENING STAR 9200 40.5 32.4 125 -M 28.8 * KIRWIN 9550 16.5 12.7 130 17.0 13.3 128 MARQUETTE 8760 6.6 -M * 9.7 12.5 78 SYLVAN LAKE 8420 31.7 24.0 132 35.3 23.7 149 SYLVAN ROAD 7120 18.5 10.0 185 26.2 19.7 133 YOUNTS PEAK 8350 23.1 18.2 127 20.4 18.1 113 ----- ----- Basin wide percent of average 133 128 POWDER-TONGUE BEAR TRAP MEADOW 8200 11.2 3.4 329 11.6 10.1 115 BIG GOOSE 7990 11.6 12.4 94 13.5 11.8 114 BONE SPRINGS DIV 9350 26.1 17.7 147 21.2 17.2 123 BURGESS JUNCTION 7880 14.2 13.2 108 14.9 14.5 103 CLOUD PEAK RESERVOIR 9860 20.4 15.9 128 18.8 15.8 119 DOME LAKE 8880 17.5 13.6 129 16.9 15.7 108 GRAVE SPRINGS 8550 10.9 11.0 99 11.4 12.3 93 HANSEN SAWMILL 8360 9.7 5.3 183 11.0 10.1 109 LITTLE GOOSE 8870 13.6 -M * 17.8 -M * MIDDLE POWDER 7760 12.7 14.3 89 12.9 14.8 87 POWDER RIVER PASS 9480 19.7 11.5 171 22.6 14.8 153 SOLDIER PARK 8720 11.0 -M * 11.8 -M * SUCKER CREEK 8880 16.7 13.4 125 18.4 16.3 113 TIE CREEK 6870 8.2 5.3 155 13.1 12.4 106 ----- ----- Basin wide percent of average 131 112 BELLE FOURCHE BLIND PARK 6890 10.6 6.2 171 -M 13.2 * COLE CANYON 5910 8.8 6.4 138 15.3 8.5 180 NORTH RAPID CREEK 6130 6.7 7.2 93 16.3 10.4 157 ----- ----- Basin wide percent of average 132 167 UPPER N. PLATTE RIVER CINNABAR PARK 9574 31.3 17.2 182 36.8 22.5 164 COLUMBINE 9160 39.2 23.4 168 42.0 28.2 149 DIVIDE PEAK 8880 30.8 20.7 149 35.5 23.3 152 ELK RIVER 8700 29.1 18.0 162 32.6 22.1 148 JOE WRIGHT 10120 43.4 24.6 176 44.4 28.6 155 NORTH FRENCH CREEK 10130 60.0 33.8 178 -M 28.2 * OLD BATTLE 10000 54.6 35.8 153 47.1 38.5 122 SAGE CREEK BASIN 7850 20.8 12.0 173 23.4 13.5 173 SOUTH BRUSH CREEK 8440 24.3 12.6 193 -M 19.1 * TOWER 10500 68.5 51.2 134 47.7 43.4 110 WEBBER SPRINGS 9250 38.4 26.0 148 44.3 30.0 148 WILLOW CREEK PASS 9540 25.1 14.2 177 22.7 14.9 152 ----- ----- Basin wide percent of average 161 142 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 40.1 27.8 144 38.0 25.7 148 CASPER MTN. 7900 12.3 17.5 70 17.0 18.1 94 DEADMAN HILL 10220 28.8 19.2 150 28.5 19.8 144 DEER PARK 9700 21.8 18.6 117 25.4 25.5 100 LAPRELE CREEK 8375 14.7 8.9 165 17.3 15.3 113 RENO HILL 8400 17.8 15.9 112 20.9 18.7 112 ROACH 9700 26.7 18.5 144 29.8 21.4 139 SAND LAKE 10050 47.5 36.2 131 -M 27.9 * SOUTH PASS 9040 19.6 17.8 110 16.6 21.5 77 WINDY PEAK 7900 11.6 6.7 173 16.2 12.6 129 ----- ----- Basin wide percent of average 129 117 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 6.7 * 20.6 17.9 115 DIVIDE PEAK 8880 30.8 20.7 149 35.5 23.3 152 OLD BATTLE 10000 54.6 35.8 153 47.1 38.5 122 SANDSTONE RS 8150 -M 11.9 * -M 21.0 * WHISKEY PARK 8950 -M 30.7 * -M 32.4 * ----- ----- Basin wide percent of average 151* 129 UPPER GREEN RIVER BIG SANDY OPENING 9080 18.9 14.8 128 19.0 15.2 125 BLIND BULL SUM 8650 42.6 28.6 149 28.2 24.5 115 EAST RIM DIVIDE 7930 18.1 13.9 130 16.6 13.4 124 ELKHART PARK G.S. 9400 17.4 13.8 126 17.0 15.2 112 GROS VENTRE SUMMIT 8750 18.5 14.2 130 18.6 14.6 127 GUNSIGHT PASS 9820 23.2 -M * 21.4 -M * KENDALL R.S. 7740 15.6 12.2 128 19.4 16.0 121 LOOMIS PARK 8240 25.3 16.0 158 26.1 19.3 135 NEW FORK LAKE 8340 15.3 10.3 149 13.9 12.8 109 POCKET CREEK 9360 16.9 -M * 18.2 -M * SNIDER BASIN 8060 23.9 14.2 168 22.7 18.0 126 SPRING CREEK DIVIDE 9000 43.1 28.9 149 38.4 29.3 131 TRIPLE PEAK 8500 41.4 25.4 163 41.6 27.7 150 ----- ----- Basin wide percent of average 146 127 LOWER GREEN RIVER HAMS FORK 7840 17.2 8.2 210 18.4 14.0 131 HEWINTA 9519 16.1 11.2 144 21.4 17.0 126 HICKERSON PARK 9145 5.9 7.4 80 12.3 9.6 128 HOLE-IN-ROCK 9150 8.8 6.3 140 13.9 9.1 153 INDIAN CREEK 9425 39.0 29.4 133 32.5 28.5 114 KELLEY R.S. 8180 25.5 16.1 158 28.6 22.8 125 STEEL CREEK PARK 10200 22.6 18.0 126 23.9 19.3 124 ----- ----- Basin wide percent of average 140 126 UPPER BEAR RIVER BUG LAKE 7950 -M 20.5 * -M 21.6 * HAYDEN FORK 9212 28.3 15.2 186 35.7 24.1 148 KELLEY R.S. 8180 25.5 16.1 158 28.6 22.8 125 LILY LAKE 9156 25.7 13.2 195 27.2 20.3 134 MONTE CRISTO 8960 47.1 29.9 158 44.9 29.0 155 SALT RIVER SUMMIT 7760 20.4 13.0 157 26.1 20.9 125 TRIAL LAKE 9992 44.8 26.6 168 40.6 28.3 143 ----- ----- Basin wide percent of average 168 140 ----------------------------------------------------------------------------- -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.