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 MONDAY: APRIL 11 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 25.5 17.5 146 27.5 22.6 122 COTTONWOOD CREEK 7670 31.8 24.2 131 39.0 29.2 134 GRAND TARGHEE 9260 52.8 -M * 40.1 -M * GRANITE CREEK 6770 24.7 17.7 140 26.8 20.8 129 GRASSY LAKE 7265 44.0 37.1 119 45.3 37.9 120 GROS VENTRE SUMMIT 8750 17.3 14.6 118 17.4 13.8 126 GUNSIGHT PASS 9820 21.0 -M * 19.5 -M * LEWIS LAKE DIVIDE 7850 46.2 36.7 126 -M 38.8 * PHILLIPS BENCH 8200 37.0 30.4 122 36.7 30.7 120 SALT RIVER SUMMIT 7760 19.5 14.7 133 24.2 19.9 122 SNAKE RIVER STATION 6920 -M 18.3 * 29.4 23.6 125 SPRING CREEK DIVIDE 9000 39.1 28.2 139 35.9 28.0 128 THUMB DIVIDE 7980 25.3 19.1 132 22.8 20.1 113 TOGWOTEE PASS 9580 33.6 26.3 128 34.9 26.3 133 TWO OCEAN PLATEAU 9240 -M 30.0 * -M 29.4 * WILLOW CREEK 8380 42.0 31.6 133 43.6 34.2 127 ----- ----- Basin wide percent of average 129 125 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 30.1 25.1 120 27.8 21.4 130 BLACK BEAR 8170 52.3 40.7 129 47.7 42.7 112 CANYON 7870 19.7 14.1 140 21.1 16.3 129 FISHER CREEK 9100 46.2 36.7 126 43.9 38.5 114 MADISON PLATEAU 7750 33.2 26.1 127 34.7 28.4 122 NORTHEAST ENTRANCE 7350 16.1 11.0 146 17.7 13.4 132 PARKER PEAK 9400 33.3 23.1 144 28.8 17.4 166 SYLVAN LAKE 8420 28.3 23.9 118 31.7 22.3 142 THUMB DIVIDE 7980 25.3 19.1 132 22.8 20.1 113 TWO OCEAN PLATEAU 9240 -M 30.0 * -M 29.4 * WHISKEY CREEK 6800 22.5 17.8 126 25.8 22.3 116 WHITE MILL 8700 32.3 25.6 126 32.4 28.6 113 WOLVERINE 7650 16.8 11.5 146 16.6 13.6 122 ----- ----- Basin wide percent of average 130 123 WIND RIVER BURROUGHS CREEK 8750 18.8 15.2 124 19.6 17.3 113 CASTLE CREEK 8400 7.9 -M * 9.5 -M * COLD SPRINGS 9630 9.9 8.0 124 10.7 11.7 91 DEER PARK 9700 20.5 17.1 120 24.1 23.5 103 HOBBS PARK 10100 17.8 16.4 109 15.7 14.1 111 LITTLE WARM 9370 14.3 12.5 114 14.8 14.4 103 SOUTH PASS 9040 18.3 17.6 104 15.9 19.8 80 ST. LAWRENCE ALT 8620 5.9 7.4 80 9.3 9.8 95 TOGWOTEE PASS 9580 33.6 26.3 128 34.9 26.3 133 TOWNSEND CREEK 8700 9.9 9.6 103 12.8 12.9 99 ----- ----- Basin wide percent of average 115 105 BIGHORN BASIN BALD MTN. 9380 26.1 21.3 123 21.1 18.7 113 BEAR TRAP MEADOW 8200 9.4 5.0 188 9.4 9.1 103 BLACKWATER 9780 31.2 26.3 119 29.7 22.1 134 BONE SPRINGS DIV 9350 22.4 17.3 129 18.5 15.8 117 EVENING STAR 9200 36.9 31.6 117 39.0 27.0 144 GRAVE SPRINGS 8550 9.6 10.4 92 9.9 10.9 91 KIRWIN 9550 14.9 12.1 123 15.8 12.1 131 MARQUETTE 8760 5.0 -M * 8.0 10.9 73 MIDDLE POWDER 7760 11.0 13.4 82 11.8 13.4 88 OWL CREEK 8975 7.0 5.6 125 7.5 6.6 114 POWDER RIVER PASS 9480 16.9 11.7 144 19.4 13.4 145 SHELL CREEK 9580 19.3 15.8 122 17.5 14.4 122 SYLVAN LAKE 8420 28.3 23.9 118 31.7 22.3 142 SYLVAN ROAD 7120 18.3 12.8 143 23.6 18.7 126 TIMBER CREEK 7950 6.0 5.8 103 7.2 8.2 88 YOUNTS PEAK 8350 21.2 18.0 118 18.6 17.2 108 ----- ----- Basin wide percent of average 121 120 SHOSHONE RIVER BLACKWATER 9780 31.2 26.3 119 29.7 22.1 134 EVENING STAR 9200 36.9 31.6 117 39.0 27.0 144 KIRWIN 9550 14.9 12.1 123 15.8 12.1 131 MARQUETTE 8760 5.0 -M * 8.0 10.9 73 SYLVAN LAKE 8420 28.3 23.9 118 31.7 22.3 142 SYLVAN ROAD 7120 18.3 12.8 143 23.6 18.7 126 YOUNTS PEAK 8350 21.2 18.0 118 18.6 17.2 108 ----- ----- Basin wide percent of average 121 128 POWDER-TONGUE BEAR TRAP MEADOW 8200 9.4 5.0 188 9.4 9.1 103 BIG GOOSE 7990 9.9 12.0 83 11.6 9.9 117 BONE SPRINGS DIV 9350 22.4 17.3 129 18.5 15.8 117 BURGESS JUNCTION 7880 12.4 12.8 97 13.3 13.2 101 CLOUD PEAK RESERVOIR 9860 18.5 14.8 125 17.0 14.1 121 DOME LAKE 8880 15.6 13.6 115 14.9 14.3 104 GRAVE SPRINGS 8550 9.6 10.4 92 9.9 10.9 91 HANSEN SAWMILL 8360 8.0 6.4 125 9.1 9.0 101 LITTLE GOOSE 8870 11.4 -M * 15.9 -M * MIDDLE POWDER 7760 11.0 13.4 82 11.8 13.4 88 POWDER RIVER PASS 9480 16.9 11.7 144 19.4 13.4 145 SOLDIER PARK 8720 9.6 -M * 10.4 -M * SUCKER CREEK 8880 15.0 13.1 115 16.5 14.7 112 TIE CREEK 6870 7.2 5.6 129 11.6 10.9 106 ----- ----- Basin wide percent of average 115 110 BELLE FOURCHE BLIND PARK 6890 9.4 8.0 118 17.5 11.9 147 COLE CANYON 5910 7.3 7.2 101 12.7 7.3 174 NORTH RAPID CREEK 6130 7.4 8.9 83 14.8 9.2 161 ----- ----- Basin wide percent of average 100 158 UPPER N. PLATTE RIVER CINNABAR PARK 9574 27.3 17.9 153 35.1 21.1 166 COLUMBINE 9160 35.7 25.0 143 37.7 26.7 141 DIVIDE PEAK 8880 26.9 20.7 130 31.7 22.0 144 ELK RIVER 8700 27.2 20.0 136 29.1 20.8 140 JOE WRIGHT 10120 36.0 23.0 157 38.7 26.5 146 NORTH FRENCH CREEK 10130 51.3 31.8 161 -M 26.3 * OLD BATTLE 10000 46.7 34.1 137 46.4 36.5 127 SAGE CREEK BASIN 7850 22.1 12.0 184 21.2 12.7 167 SOUTH BRUSH CREEK 8440 20.5 13.4 153 24.7 17.6 140 TOWER 10500 59.8 48.6 123 47.5 40.8 116 WEBBER SPRINGS 9250 33.8 26.3 129 39.5 28.3 140 WILLOW CREEK PASS 9540 21.9 13.2 166 19.7 13.8 143 ----- ----- Basin wide percent of average 143 139 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 34.3 25.8 133 33.1 23.7 140 CASPER MTN. 7900 11.9 16.2 73 15.7 16.0 98 DEADMAN HILL 10220 22.5 17.8 126 23.7 18.2 130 DEER PARK 9700 20.5 17.1 120 24.1 23.5 103 LAPRELE CREEK 8375 13.9 10.7 130 15.6 13.8 113 RENO HILL 8400 16.1 15.6 103 18.9 16.6 114 ROACH 9700 21.8 18.2 120 25.4 19.9 128 SAND LAKE 10050 41.2 34.4 120 -M 25.9 * SOUTH PASS 9040 18.3 17.6 104 15.9 19.8 80 WINDY PEAK 7900 10.9 8.3 131 14.6 11.4 128 ----- ----- Basin wide percent of average 116 115 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 9.5 * 17.4 16.8 104 DIVIDE PEAK 8880 26.9 20.7 130 31.7 22.0 144 OLD BATTLE 10000 46.7 34.1 137 46.4 36.5 127 SANDSTONE RS 8150 20.6 14.0 147 -M 19.8 * WHISKEY PARK 8950 -M 30.7 * -M 30.4 * ----- ----- Basin wide percent of average 137 127 UPPER GREEN RIVER BIG SANDY OPENING 9080 17.4 15.3 114 17.5 14.2 123 BLIND BULL SUM 8650 38.0 28.9 131 26.0 23.5 111 EAST RIM DIVIDE 7930 17.5 13.8 127 15.4 12.7 121 ELKHART PARK G.S. 9400 15.9 14.0 114 15.6 14.2 110 GROS VENTRE SUMMIT 8750 17.3 14.6 118 17.4 13.8 126 GUNSIGHT PASS 9820 21.0 -M * 19.5 -M * KENDALL R.S. 7740 15.1 14.0 108 17.3 15.3 113 LOOMIS PARK 8240 23.4 17.4 134 23.6 18.4 128 NEW FORK LAKE 8340 14.1 11.5 123 12.8 12.0 107 POCKET CREEK 9360 14.6 -M * 16.4 -M * SNIDER BASIN 8060 22.4 15.0 149 21.0 17.1 123 SPRING CREEK DIVIDE 9000 39.1 28.2 139 35.9 28.0 128 TRIPLE PEAK 8500 37.7 25.9 146 37.9 26.3 144 ----- ----- Basin wide percent of average 130 123 LOWER GREEN RIVER HAMS FORK 7840 17.3 10.7 162 16.6 13.0 128 HEWINTA 9519 13.8 12.5 110 19.1 15.8 121 HICKERSON PARK 9145 7.9 8.4 94 11.7 8.6 136 HOLE-IN-ROCK 9150 9.6 7.5 128 13.1 8.2 160 INDIAN CREEK 9425 35.1 29.4 119 29.9 27.1 110 KELLEY R.S. 8180 23.6 17.4 136 26.3 21.6 122 STEEL CREEK PARK 10200 19.9 16.9 118 22.5 17.8 126 ----- ----- Basin wide percent of average 124 124 UPPER BEAR RIVER BUG LAKE 7950 33.5 21.8 154 32.1 20.4 157 HAYDEN FORK 9212 26.6 16.8 158 32.9 22.5 146 KELLEY R.S. 8180 23.6 17.4 136 26.3 21.6 122 LILY LAKE 9156 24.4 14.6 167 25.1 18.9 133 MONTE CRISTO 8960 42.9 30.6 140 40.5 27.2 149 SALT RIVER SUMMIT 7760 19.5 14.7 133 24.2 19.9 122 TRIAL LAKE 9992 40.4 26.2 154 36.6 26.6 138 ----- ----- Basin wide percent of average 148 139 ----------------------------------------------------------------------------- -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.