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 9 , 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 17.7 143 27.1 22.4 121 COTTONWOOD CREEK 7670 31.2 24.3 128 38.3 28.9 133 GRAND TARGHEE 9260 52.2 -M * 39.6 -M * GRANITE CREEK 6770 24.4 18.0 136 26.4 20.7 128 GRASSY LAKE 7265 43.7 37.0 118 45.0 37.6 120 GROS VENTRE SUMMIT 8750 16.6 14.6 114 16.7 13.6 123 GUNSIGHT PASS 9820 20.4 -M * 19.1 -M * LEWIS LAKE DIVIDE 7850 46.0 36.6 126 -M 38.5 * PHILLIPS BENCH 8200 36.7 30.2 122 36.3 30.4 119 SALT RIVER SUMMIT 7760 19.2 14.8 130 23.8 19.8 120 SNAKE RIVER STATION 6920 -M 18.6 * 29.2 23.4 125 SPRING CREEK DIVIDE 9000 38.7 28.0 138 35.5 27.8 128 THUMB DIVIDE 7980 25.2 19.3 131 22.6 19.9 114 TOGWOTEE PASS 9580 32.7 26.1 125 33.4 26.0 128 TWO OCEAN PLATEAU 9240 -M 29.7 * -M 29.1 * WILLOW CREEK 8380 41.0 31.5 130 43.5 33.9 128 ----- ----- Basin wide percent of average 128 124 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 30.0 24.6 122 27.7 21.1 131 BLACK BEAR 8170 52.2 40.5 129 -M 42.3 * CANYON 7870 19.7 14.0 141 21.0 16.2 130 FISHER CREEK 9100 46.1 36.4 127 -M 38.2 * MADISON PLATEAU 7750 33.1 26.0 127 34.6 28.2 123 NORTHEAST ENTRANCE 7350 16.2 11.0 147 17.7 13.3 133 PARKER PEAK 9400 33.0 22.8 145 -M 17.2 * SYLVAN LAKE 8420 28.1 23.6 119 31.5 22.0 143 THUMB DIVIDE 7980 25.2 19.3 131 22.6 19.9 114 TWO OCEAN PLATEAU 9240 -M 29.7 * -M 29.1 * WHISKEY CREEK 6800 22.5 17.7 127 25.7 22.1 116 WHITE MILL 8700 32.3 25.3 128 32.3 28.3 114 WOLVERINE 7650 16.7 11.5 145 16.4 13.5 121 ----- ----- Basin wide percent of average 130 124 WIND RIVER BURROUGHS CREEK 8750 18.6 15.1 123 19.3 17.1 113 CASTLE CREEK 8400 7.7 -M * 9.2 -M * COLD SPRINGS 9630 9.2 8.3 111 9.8 11.5 85 DEER PARK 9700 20.1 17.3 116 23.6 23.3 101 HOBBS PARK 10100 17.3 16.1 107 15.1 13.9 109 LITTLE WARM 9370 14.0 12.4 113 14.4 14.2 101 SOUTH PASS 9040 18.0 17.4 103 15.6 19.5 80 ST. LAWRENCE ALT 8620 5.7 7.5 76 9.0 9.6 94 TOGWOTEE PASS 9580 32.7 26.1 125 33.4 26.0 128 TOWNSEND CREEK 8700 9.8 9.6 102 12.2 12.6 97 ----- ----- Basin wide percent of average 112 103 BIGHORN BASIN BALD MTN. 9380 25.8 20.9 123 20.7 18.4 113 BEAR TRAP MEADOW 8200 9.3 5.1 182 9.1 8.9 102 BLACKWATER 9780 30.5 25.9 118 29.1 21.8 133 BONE SPRINGS DIV 9350 22.0 17.1 129 18.1 15.6 116 EVENING STAR 9200 36.8 31.3 118 -M 26.7 * GRAVE SPRINGS 8550 9.4 10.2 92 9.6 10.6 91 KIRWIN 9550 14.2 12.0 118 15.3 12.0 128 MARQUETTE 8760 4.5 -M * 7.3 10.7 68 MIDDLE POWDER 7760 10.6 13.0 82 11.5 13.2 87 OWL CREEK 8975 6.4 5.7 112 6.9 6.4 108 POWDER RIVER PASS 9480 16.5 11.5 143 19.0 13.2 144 SHELL CREEK 9580 19.0 15.6 122 17.2 14.2 121 SYLVAN LAKE 8420 28.1 23.6 119 31.5 22.0 143 SYLVAN ROAD 7120 18.3 12.7 144 23.6 18.5 128 TIMBER CREEK 7950 5.3 5.8 91 6.5 8.0 81 YOUNTS PEAK 8350 20.9 17.8 117 18.2 17.0 107 ----- ----- Basin wide percent of average 120 116 SHOSHONE RIVER BLACKWATER 9780 30.5 25.9 118 29.1 21.8 133 EVENING STAR 9200 36.8 31.3 118 -M 26.7 * KIRWIN 9550 14.2 12.0 118 15.3 12.0 128 MARQUETTE 8760 4.5 -M * 7.3 10.7 68 SYLVAN LAKE 8420 28.1 23.6 119 31.5 22.0 143 SYLVAN ROAD 7120 18.3 12.7 144 23.6 18.5 128 YOUNTS PEAK 8350 20.9 17.8 117 18.2 17.0 107 ----- ----- Basin wide percent of average 121 123 POWDER-TONGUE BEAR TRAP MEADOW 8200 9.3 5.1 182 9.1 8.9 102 BIG GOOSE 7990 9.5 11.8 81 11.3 9.7 116 BONE SPRINGS DIV 9350 22.0 17.1 129 18.1 15.6 116 BURGESS JUNCTION 7880 12.2 12.5 98 13.1 13.0 101 CLOUD PEAK RESERVOIR 9860 18.2 14.5 126 16.8 13.9 121 DOME LAKE 8880 15.3 13.4 114 14.4 14.1 102 GRAVE SPRINGS 8550 9.4 10.2 92 9.6 10.6 91 HANSEN SAWMILL 8360 7.8 6.5 120 8.8 8.8 100 LITTLE GOOSE 8870 10.8 -M * 15.3 -M * MIDDLE POWDER 7760 10.6 13.0 82 11.5 13.2 87 POWDER RIVER PASS 9480 16.5 11.5 143 19.0 13.2 144 SOLDIER PARK 8720 9.5 -M * 10.3 -M * SUCKER CREEK 8880 14.6 12.8 114 16.1 14.5 111 TIE CREEK 6870 7.3 6.0 122 11.3 10.7 106 ----- ----- Basin wide percent of average 114 109 BELLE FOURCHE BLIND PARK 6890 9.5 8.1 117 17.4 11.8 147 COLE CANYON 5910 7.6 7.1 107 12.7 7.2 176 NORTH RAPID CREEK 6130 7.8 8.8 89 14.7 9.1 162 ----- ----- Basin wide percent of average 104 159 UPPER N. PLATTE RIVER CINNABAR PARK 9574 26.4 18.0 147 34.4 20.9 165 COLUMBINE 9160 36.1 25.1 144 37.0 26.4 140 DIVIDE PEAK 8880 25.1 20.6 122 29.9 21.7 138 ELK RIVER 8700 26.2 20.1 130 28.3 20.6 137 JOE WRIGHT 10120 35.1 22.7 155 37.8 26.2 144 NORTH FRENCH CREEK 10130 49.8 31.4 159 -M 25.9 * OLD BATTLE 10000 45.5 33.8 135 46.4 36.1 129 SAGE CREEK BASIN 7850 21.2 11.9 178 20.2 12.6 160 SOUTH BRUSH CREEK 8440 20.0 13.4 149 23.9 17.4 137 TOWER 10500 58.7 48.0 122 47.5 40.3 118 WEBBER SPRINGS 9250 32.6 26.3 124 38.1 28.0 136 WILLOW CREEK PASS 9540 21.2 13.0 163 19.3 13.6 142 ----- ----- Basin wide percent of average 140 138 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 33.8 25.4 133 32.6 23.4 139 CASPER MTN. 7900 11.4 15.9 72 15.1 15.7 96 DEADMAN HILL 10220 22.1 17.5 126 23.4 18.0 130 DEER PARK 9700 20.1 17.3 116 23.6 23.3 101 LAPRELE CREEK 8375 13.8 10.8 128 15.5 13.5 115 RENO HILL 8400 15.7 15.4 102 18.6 16.3 114 ROACH 9700 21.7 18.1 120 24.8 19.7 126 SAND LAKE 10050 40.3 34.1 118 -M 25.5 * SOUTH PASS 9040 18.0 17.4 103 15.6 19.5 80 WINDY PEAK 7900 10.6 8.4 126 14.3 11.2 128 ----- ----- Basin wide percent of average 115 114 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 9.8 * 16.2 16.7 97 DIVIDE PEAK 8880 25.1 20.6 122 29.9 21.7 138 OLD BATTLE 10000 45.5 33.8 135 46.4 36.1 129 SANDSTONE RS 8150 19.1 14.2 135 27.4 19.6 140 WHISKEY PARK 8950 -M 30.7 * -M 30.1 * ----- ----- Basin wide percent of average 131 127 UPPER GREEN RIVER BIG SANDY OPENING 9080 17.2 15.2 113 17.2 14.1 122 BLIND BULL SUM 8650 37.6 28.8 131 25.8 23.3 111 EAST RIM DIVIDE 7930 16.9 13.7 123 14.9 12.6 118 ELKHART PARK G.S. 9400 15.3 13.9 110 15.1 14.1 107 GROS VENTRE SUMMIT 8750 16.6 14.6 114 16.7 13.6 123 GUNSIGHT PASS 9820 20.4 -M * 19.1 -M * KENDALL R.S. 7740 14.9 14.2 105 17.0 15.2 112 LOOMIS PARK 8240 22.9 17.5 131 23.0 18.2 126 NEW FORK LAKE 8340 13.7 11.5 119 12.4 11.9 104 POCKET CREEK 9360 14.3 -M * 16.1 -M * SNIDER BASIN 8060 22.3 15.0 149 20.8 17.0 122 SPRING CREEK DIVIDE 9000 38.7 28.0 138 35.5 27.8 128 TRIPLE PEAK 8500 37.3 25.8 145 37.5 26.0 144 ----- ----- Basin wide percent of average 128 122 LOWER GREEN RIVER HAMS FORK 7840 17.4 11.0 158 16.4 12.9 127 HEWINTA 9519 13.2 12.5 106 18.7 15.5 121 HICKERSON PARK 9145 7.8 8.3 94 11.5 8.5 135 HOLE-IN-ROCK 9150 9.2 7.5 123 12.8 8.0 160 INDIAN CREEK 9425 34.6 29.2 118 29.6 26.8 110 KELLEY R.S. 8180 23.3 17.4 134 26.0 21.4 121 STEEL CREEK PARK 10200 19.3 16.7 116 21.9 17.5 125 ----- ----- Basin wide percent of average 122 124 UPPER BEAR RIVER BUG LAKE 7950 33.2 21.8 152 31.3 20.2 155 HAYDEN FORK 9212 25.7 16.9 152 32.0 22.3 143 KELLEY R.S. 8180 23.3 17.4 134 26.0 21.4 121 LILY LAKE 9156 23.6 14.6 162 24.2 18.6 130 MONTE CRISTO 8960 42.4 30.5 139 40.4 26.9 150 SALT RIVER SUMMIT 7760 19.2 14.8 130 23.8 19.8 120 TRIAL LAKE 9992 39.7 26.0 153 36.4 26.3 138 ----- ----- Basin wide percent of average 146 138 ----------------------------------------------------------------------------- -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.