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 TUESDAY: APRIL 19 , 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 15.9 159 29.5 23.3 127 COTTONWOOD CREEK 7670 36.0 23.1 156 42.7 30.3 141 GRAND TARGHEE 9260 58.2 -M * 44.0 -M * GRANITE CREEK 6770 25.8 16.1 160 29.0 21.4 136 GRASSY LAKE 7265 47.0 36.6 128 48.9 39.1 125 GROS VENTRE SUMMIT 8750 17.9 14.5 123 18.3 14.3 128 GUNSIGHT PASS 9820 22.7 -M * -M -M * LEWIS LAKE DIVIDE 7850 52.0 36.5 142 -M 40.0 * PHILLIPS BENCH 8200 38.4 30.7 125 39.4 31.6 125 SALT RIVER SUMMIT 7760 20.1 13.8 146 25.7 20.6 125 SNAKE RIVER STATION 6920 -M 16.5 * 31.4 24.4 129 SPRING CREEK DIVIDE 9000 42.4 28.8 147 38.2 28.9 132 THUMB DIVIDE 7980 27.8 18.0 154 25.3 20.8 122 TOGWOTEE PASS 9580 36.1 27.1 133 37.4 27.3 137 TWO OCEAN PLATEAU 9240 -M 31.1 * -M 30.4 * WILLOW CREEK 8380 46.1 31.9 145 49.4 35.6 139 ----- ----- Basin wide percent of average 142 131 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 31.5 25.6 123 30.2 22.2 136 BLACK BEAR 8170 53.5 40.9 131 51.9 44.0 118 CANYON 7870 20.4 13.3 153 21.9 16.9 130 FISHER CREEK 9100 -M 37.3 * -M 39.8 * MADISON PLATEAU 7750 34.9 25.9 135 37.0 29.3 126 NORTHEAST ENTRANCE 7350 16.4 9.9 166 18.6 13.9 134 PARKER PEAK 9400 35.6 23.7 150 30.2 18.2 166 SYLVAN LAKE 8420 30.6 24.1 127 34.4 23.2 148 THUMB DIVIDE 7980 27.8 18.0 154 25.3 20.8 122 TWO OCEAN PLATEAU 9240 -M 31.1 * -M 30.4 * WHISKEY CREEK 6800 23.1 17.5 132 26.9 23.0 117 WHITE MILL 8700 34.3 26.2 131 34.0 29.6 115 WOLVERINE 7650 17.5 10.2 172 17.5 14.2 123 ----- ----- Basin wide percent of average 138 128 WIND RIVER BURROUGHS CREEK 8750 20.4 14.9 137 21.3 18.1 118 CASTLE CREEK 8400 8.0 -M * 10.4 -M * COLD SPRINGS 9630 10.1 6.1 166 11.2 12.5 90 DEER PARK 9700 21.5 17.8 121 25.0 24.8 101 HOBBS PARK 10100 18.5 17.0 109 16.4 15.2 108 LITTLE WARM 9370 15.1 12.2 124 15.6 15.3 102 SOUTH PASS 9040 19.0 17.8 107 16.5 20.9 79 ST. LAWRENCE ALT 8620 5.5 6.8 81 9.7 10.7 91 TOGWOTEE PASS 9580 36.1 27.1 133 37.4 27.3 137 TOWNSEND CREEK 8700 10.0 9.6 104 13.0 13.9 94 ----- ----- Basin wide percent of average 121 105 BIGHORN BASIN BALD MTN. 9380 29.0 22.3 130 23.7 19.6 121 BEAR TRAP MEADOW 8200 10.7 4.0 268 11.0 9.8 112 BLACKWATER 9780 34.9 27.2 128 32.8 23.1 142 BONE SPRINGS DIV 9350 25.1 17.7 142 20.4 16.8 121 EVENING STAR 9200 39.5 32.4 122 41.3 28.2 146 GRAVE SPRINGS 8550 10.8 10.8 100 11.1 11.8 94 KIRWIN 9550 16.3 12.5 130 17.1 12.9 133 MARQUETTE 8760 6.6 -M * 9.4 12.0 78 MIDDLE POWDER 7760 12.0 14.2 85 12.5 14.3 87 OWL CREEK 8975 7.9 5.0 158 8.6 7.2 119 POWDER RIVER PASS 9480 18.7 11.7 160 21.7 14.3 152 SHELL CREEK 9580 21.5 16.3 132 19.3 15.3 126 SYLVAN LAKE 8420 30.6 24.1 127 34.4 23.2 148 SYLVAN ROAD 7120 18.2 11.3 161 25.6 19.4 132 TIMBER CREEK 7950 6.3 5.5 115 7.8 9.0 87 YOUNTS PEAK 8350 22.6 18.2 124 20.0 17.8 112 ----- ----- Basin wide percent of average 130 124 SHOSHONE RIVER BLACKWATER 9780 34.9 27.2 128 32.8 23.1 142 EVENING STAR 9200 39.5 32.4 122 41.3 28.2 146 KIRWIN 9550 16.3 12.5 130 17.1 12.9 133 MARQUETTE 8760 6.6 -M * 9.4 12.0 78 SYLVAN LAKE 8420 30.6 24.1 127 34.4 23.2 148 SYLVAN ROAD 7120 18.2 11.3 161 25.6 19.4 132 YOUNTS PEAK 8350 22.6 18.2 124 20.0 17.8 112 ----- ----- Basin wide percent of average 129 132 POWDER-TONGUE BEAR TRAP MEADOW 8200 10.7 4.0 268 11.0 9.8 112 BIG GOOSE 7990 11.0 12.5 88 12.8 11.2 114 BONE SPRINGS DIV 9350 25.1 17.7 142 20.4 16.8 121 BURGESS JUNCTION 7880 13.7 13.3 103 14.5 14.0 104 CLOUD PEAK RESERVOIR 9860 19.7 15.6 126 18.5 15.2 122 DOME LAKE 8880 16.9 13.8 122 16.3 15.3 107 GRAVE SPRINGS 8550 10.8 10.8 100 11.1 11.8 94 HANSEN SAWMILL 8360 9.7 5.7 170 10.9 9.7 112 LITTLE GOOSE 8870 12.7 -M * 17.0 -M * MIDDLE POWDER 7760 12.0 14.2 85 12.5 14.3 87 POWDER RIVER PASS 9480 18.7 11.7 160 21.7 14.3 152 SOLDIER PARK 8720 10.7 -M * 11.7 -M * SUCKER CREEK 8880 16.1 13.4 120 17.8 15.7 113 TIE CREEK 6870 8.0 5.3 151 12.8 11.9 108 ----- ----- Basin wide percent of average 125 113 BELLE FOURCHE BLIND PARK 6890 9.9 7.0 141 18.7 12.8 146 COLE CANYON 5910 7.8 6.9 113 14.3 8.0 179 NORTH RAPID CREEK 6130 6.8 8.3 82 15.7 9.9 159 ----- ----- Basin wide percent of average 110 159 UPPER N. PLATTE RIVER CINNABAR PARK 9574 30.3 17.5 173 36.9 22.0 168 COLUMBINE 9160 38.5 24.1 160 40.2 27.7 145 DIVIDE PEAK 8880 30.7 20.9 147 34.2 22.9 149 ELK RIVER 8700 28.2 19.0 148 31.1 21.7 143 JOE WRIGHT 10120 40.8 24.1 169 41.9 27.9 150 NORTH FRENCH CREEK 10130 58.0 33.3 174 -M 27.6 * OLD BATTLE 10000 52.3 35.3 148 47.0 37.8 124 SAGE CREEK BASIN 7850 21.1 12.1 174 22.9 13.3 172 SOUTH BRUSH CREEK 8440 23.3 13.0 179 -M 18.6 * TOWER 10500 65.3 50.4 130 47.6 42.6 112 WEBBER SPRINGS 9250 37.2 26.0 143 42.7 29.5 145 WILLOW CREEK PASS 9540 24.0 14.0 171 21.4 14.5 148 ----- ----- Basin wide percent of average 155 141 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 39.1 27.2 144 33.6 25.0 134 CASPER MTN. 7900 12.2 17.2 71 16.6 17.4 95 DEADMAN HILL 10220 26.7 18.8 142 26.7 19.3 138 DEER PARK 9700 21.5 17.8 121 25.0 24.8 101 LAPRELE CREEK 8375 14.0 9.6 146 16.6 14.8 112 RENO HILL 8400 17.0 16.0 106 20.3 18.0 113 ROACH 9700 25.0 18.5 135 27.8 20.9 133 SAND LAKE 10050 46.0 35.6 129 -M 27.2 * SOUTH PASS 9040 19.0 17.8 107 16.5 20.9 79 WINDY PEAK 7900 11.4 7.4 154 15.8 12.2 130 ----- ----- Basin wide percent of average 125 115 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 7.7 * 19.4 17.5 111 DIVIDE PEAK 8880 30.7 20.9 147 34.2 22.9 149 OLD BATTLE 10000 52.3 35.3 148 47.0 37.8 124 SANDSTONE RS 8150 21.9 12.8 171 -M 20.5 * WHISKEY PARK 8950 -M 30.6 * -M 31.7 * ----- ----- Basin wide percent of average 152 129 UPPER GREEN RIVER BIG SANDY OPENING 9080 18.5 15.2 122 18.7 14.8 126 BLIND BULL SUM 8650 41.9 28.8 145 28.1 24.2 116 EAST RIM DIVIDE 7930 17.5 14.0 125 16.4 13.1 125 ELKHART PARK G.S. 9400 17.1 14.0 122 16.9 14.9 113 GROS VENTRE SUMMIT 8750 17.9 14.5 123 18.3 14.3 128 GUNSIGHT PASS 9820 22.7 -M * -M -M * KENDALL R.S. 7740 15.0 13.0 115 18.8 15.8 119 LOOMIS PARK 8240 24.3 16.6 146 25.5 19.0 134 NEW FORK LAKE 8340 14.8 10.9 136 13.7 12.5 110 POCKET CREEK 9360 16.3 -M * 17.8 -M * SNIDER BASIN 8060 23.3 14.7 159 22.5 17.7 127 SPRING CREEK DIVIDE 9000 42.4 28.8 147 38.2 28.9 132 TRIPLE PEAK 8500 40.7 25.8 158 40.8 27.2 150 ----- ----- Basin wide percent of average 139 127 LOWER GREEN RIVER HAMS FORK 7840 16.3 9.1 179 17.8 13.7 130 HEWINTA 9519 15.0 11.9 126 20.7 16.6 125 HICKERSON PARK 9145 6.5 7.9 82 12.2 9.3 131 HOLE-IN-ROCK 9150 8.4 6.9 122 13.5 8.8 153 INDIAN CREEK 9425 37.9 29.6 128 31.9 28.1 114 KELLEY R.S. 8180 25.0 16.7 150 28.1 22.4 125 STEEL CREEK PARK 10200 21.7 17.6 123 23.5 18.8 125 ----- ----- Basin wide percent of average 131 125 UPPER BEAR RIVER BUG LAKE 7950 -M 21.2 * -M 21.2 * HAYDEN FORK 9212 26.7 16.0 167 34.6 23.6 147 KELLEY R.S. 8180 25.0 16.7 150 28.1 22.4 125 LILY LAKE 9156 25.2 14.0 180 26.3 19.8 133 MONTE CRISTO 8960 46.9 30.3 155 43.7 28.4 154 SALT RIVER SUMMIT 7760 20.1 13.8 146 25.7 20.6 125 TRIAL LAKE 9992 43.3 26.5 163 38.9 27.7 140 ----- ----- Basin wide percent of average 160 138 ----------------------------------------------------------------------------- -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.