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 16 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 24.8 16.6 149 28.0 23.0 122 COTTONWOOD CREEK 7670 33.2 23.6 141 39.6 29.9 132 GRAND TARGHEE 9260 55.4 -M * 41.6 -M * GRANITE CREEK 6770 24.6 16.8 146 27.1 21.2 128 GRASSY LAKE 7265 45.4 37.0 123 47.0 38.7 121 GROS VENTRE SUMMIT 8750 17.6 14.6 121 17.6 14.1 125 GUNSIGHT PASS 9820 21.5 -M * 20.1 -M * LEWIS LAKE DIVIDE 7850 48.5 36.7 132 -M 39.5 * PHILLIPS BENCH 8200 37.4 30.6 122 37.5 31.3 120 SALT RIVER SUMMIT 7760 19.4 14.3 136 24.5 20.4 120 SNAKE RIVER STATION 6920 -M 17.3 * 30.3 24.1 126 SPRING CREEK DIVIDE 9000 39.7 28.6 139 36.2 28.6 127 THUMB DIVIDE 7980 25.6 18.5 138 23.4 20.5 114 TOGWOTEE PASS 9580 34.6 26.8 129 35.9 26.9 133 TWO OCEAN PLATEAU 9240 -M 30.7 * -M 30.0 * WILLOW CREEK 8380 42.7 31.9 134 46.4 35.1 132 ----- ----- Basin wide percent of average 133 125 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 30.5 25.5 120 29.1 21.9 133 BLACK BEAR 8170 52.3 41.0 128 50.7 43.5 117 CANYON 7870 19.9 13.8 144 21.3 16.7 128 FISHER CREEK 9100 -M 37.1 * -M 39.3 * MADISON PLATEAU 7750 34.3 26.0 132 36.2 29.0 125 NORTHEAST ENTRANCE 7350 16.2 10.5 154 18.0 13.8 130 PARKER PEAK 9400 34.2 23.4 146 -M 17.9 * SYLVAN LAKE 8420 29.0 24.3 119 32.6 22.9 142 THUMB DIVIDE 7980 25.6 18.5 138 23.4 20.5 114 TWO OCEAN PLATEAU 9240 -M 30.7 * -M 30.0 * WHISKEY CREEK 6800 23.1 17.8 130 26.5 22.7 117 WHITE MILL 8700 32.9 26.1 126 32.8 29.2 112 WOLVERINE 7650 16.6 10.9 152 16.7 14.0 119 ----- ----- Basin wide percent of average 132 123 WIND RIVER BURROUGHS CREEK 8750 19.2 15.2 126 20.1 17.8 113 CASTLE CREEK 8400 8.1 -M * 9.9 -M * COLD SPRINGS 9630 9.7 6.9 141 11.0 12.2 90 DEER PARK 9700 20.9 17.7 118 24.4 24.3 100 HOBBS PARK 10100 18.2 16.8 108 16.2 14.8 109 LITTLE WARM 9370 14.5 12.5 116 15.1 15.0 101 SOUTH PASS 9040 18.8 17.7 106 16.2 20.5 79 ST. LAWRENCE ALT 8620 6.1 7.3 84 9.6 10.3 93 TOGWOTEE PASS 9580 34.6 26.8 129 35.9 26.9 133 TOWNSEND CREEK 8700 10.1 9.8 103 13.0 13.5 96 ----- ----- Basin wide percent of average 116 104 BIGHORN BASIN BALD MTN. 9380 27.7 22.0 126 22.5 19.3 117 BEAR TRAP MEADOW 8200 10.1 4.6 220 10.3 9.5 108 BLACKWATER 9780 31.9 27.0 118 30.4 22.8 133 BONE SPRINGS DIV 9350 23.3 17.7 132 18.9 16.4 115 EVENING STAR 9200 37.8 32.1 118 -M 27.7 * GRAVE SPRINGS 8550 10.8 10.8 100 11.0 11.5 96 KIRWIN 9550 15.6 12.4 126 16.5 12.6 131 MARQUETTE 8760 5.6 -M * 8.7 11.6 75 MIDDLE POWDER 7760 11.8 14.0 84 12.5 14.0 89 OWL CREEK 8975 8.0 5.1 157 8.3 6.9 120 POWDER RIVER PASS 9480 17.6 11.8 149 20.2 13.9 145 SHELL CREEK 9580 20.3 16.1 126 18.2 15.0 121 SYLVAN LAKE 8420 29.0 24.3 119 32.6 22.9 142 SYLVAN ROAD 7120 17.7 11.8 150 24.0 19.1 126 TIMBER CREEK 7950 6.5 5.6 116 7.6 8.7 87 YOUNTS PEAK 8350 21.5 18.1 119 18.9 17.5 108 ----- ----- Basin wide percent of average 124 118 SHOSHONE RIVER BLACKWATER 9780 31.9 27.0 118 30.4 22.8 133 EVENING STAR 9200 37.8 32.1 118 -M 27.7 * KIRWIN 9550 15.6 12.4 126 16.5 12.6 131 MARQUETTE 8760 5.6 -M * 8.7 11.6 75 SYLVAN LAKE 8420 29.0 24.3 119 32.6 22.9 142 SYLVAN ROAD 7120 17.7 11.8 150 24.0 19.1 126 YOUNTS PEAK 8350 21.5 18.1 119 18.9 17.5 108 ----- ----- Basin wide percent of average 122 123 POWDER-TONGUE BEAR TRAP MEADOW 8200 10.1 4.6 220 10.3 9.5 108 BIG GOOSE 7990 10.4 12.4 84 12.1 10.7 113 BONE SPRINGS DIV 9350 23.3 17.7 132 18.9 16.4 115 BURGESS JUNCTION 7880 13.0 13.3 98 13.9 13.7 101 CLOUD PEAK RESERVOIR 9860 19.2 15.4 125 17.9 14.8 121 DOME LAKE 8880 16.1 14.0 115 15.3 14.9 103 GRAVE SPRINGS 8550 10.8 10.8 100 11.0 11.5 96 HANSEN SAWMILL 8360 9.1 6.1 149 10.1 9.4 107 LITTLE GOOSE 8870 12.0 -M * 16.3 -M * MIDDLE POWDER 7760 11.8 14.0 84 12.5 14.0 89 POWDER RIVER PASS 9480 17.6 11.8 149 20.2 13.9 145 SOLDIER PARK 8720 10.3 -M * 11.0 -M * SUCKER CREEK 8880 15.4 13.5 114 16.9 15.3 110 TIE CREEK 6870 7.3 5.4 135 12.0 11.5 104 ----- ----- Basin wide percent of average 118 110 BELLE FOURCHE BLIND PARK 6890 9.6 7.5 128 18.1 12.4 146 COLE CANYON 5910 7.3 7.1 103 13.6 7.7 177 NORTH RAPID CREEK 6130 6.8 8.7 78 15.2 9.6 158 ----- ----- Basin wide percent of average 102 158 UPPER N. PLATTE RIVER CINNABAR PARK 9574 27.8 17.6 158 36.0 21.7 166 COLUMBINE 9160 36.4 24.6 148 38.6 27.3 141 DIVIDE PEAK 8880 27.4 20.9 131 32.0 22.5 142 ELK RIVER 8700 26.9 19.5 138 29.5 21.4 138 JOE WRIGHT 10120 38.1 23.8 160 40.2 27.4 147 NORTH FRENCH CREEK 10130 53.1 32.8 162 -M 27.1 * OLD BATTLE 10000 48.8 34.8 140 46.8 37.3 125 SAGE CREEK BASIN 7850 21.3 12.1 176 21.3 13.1 163 SOUTH BRUSH CREEK 8440 21.4 13.2 162 25.7 18.2 141 TOWER 10500 61.6 49.8 124 47.6 41.9 114 WEBBER SPRINGS 9250 34.2 26.1 131 39.9 29.0 138 WILLOW CREEK PASS 9540 22.8 13.7 166 20.3 14.2 143 ----- ----- Basin wide percent of average 145 138 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 35.7 26.7 134 33.6 24.5 137 CASPER MTN. 7900 12.1 16.9 72 16.3 16.8 97 DEADMAN HILL 10220 24.2 18.4 132 24.8 18.9 131 DEER PARK 9700 20.9 17.7 118 24.4 24.3 100 LAPRELE CREEK 8375 13.9 10.1 138 15.8 14.4 110 RENO HILL 8400 16.6 15.9 104 19.5 17.5 111 ROACH 9700 22.8 18.4 124 26.0 20.5 127 SAND LAKE 10050 42.8 35.1 122 -M 26.7 * SOUTH PASS 9040 18.8 17.7 106 16.2 20.5 79 WINDY PEAK 7900 11.0 7.9 139 14.9 11.9 125 ----- ----- Basin wide percent of average 118 113 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 8.4 * 17.9 17.3 103 DIVIDE PEAK 8880 27.4 20.9 131 32.0 22.5 142 OLD BATTLE 10000 48.8 34.8 140 46.8 37.3 125 SANDSTONE RS 8150 20.7 13.3 156 -M 20.2 * WHISKEY PARK 8950 -M 30.6 * -M 31.2 * ----- ----- Basin wide percent of average 140 125 UPPER GREEN RIVER BIG SANDY OPENING 9080 17.7 15.3 116 17.8 14.6 122 BLIND BULL SUM 8650 39.0 28.9 135 26.3 23.9 110 EAST RIM DIVIDE 7930 17.4 14.0 124 15.6 13.0 120 ELKHART PARK G.S. 9400 16.3 14.0 116 16.0 14.6 110 GROS VENTRE SUMMIT 8750 17.6 14.6 121 17.6 14.1 125 GUNSIGHT PASS 9820 21.5 -M * 20.1 -M * KENDALL R.S. 7740 14.0 13.5 104 17.4 15.6 112 LOOMIS PARK 8240 23.1 17.0 136 23.9 18.7 128 NEW FORK LAKE 8340 14.1 11.2 126 13.1 12.3 107 POCKET CREEK 9360 15.2 -M * 16.9 -M * SNIDER BASIN 8060 22.4 14.9 150 21.1 17.5 121 SPRING CREEK DIVIDE 9000 39.7 28.6 139 36.2 28.6 127 TRIPLE PEAK 8500 37.9 25.9 146 38.4 26.8 143 ----- ----- Basin wide percent of average 131 122 LOWER GREEN RIVER HAMS FORK 7840 16.5 9.8 168 16.9 13.4 126 HEWINTA 9519 14.7 12.2 120 19.6 16.3 120 HICKERSON PARK 9145 7.7 8.2 94 11.9 9.0 132 HOLE-IN-ROCK 9150 9.9 7.2 138 13.3 8.6 155 INDIAN CREEK 9425 35.7 29.6 121 30.3 27.7 109 KELLEY R.S. 8180 23.8 17.1 139 26.7 22.1 121 STEEL CREEK PARK 10200 20.6 17.4 118 23.0 18.5 124 ----- ----- Basin wide percent of average 127 123 UPPER BEAR RIVER BUG LAKE 7950 33.5 21.6 155 33.0 20.9 158 HAYDEN FORK 9212 26.8 16.4 163 33.4 23.2 144 KELLEY R.S. 8180 23.8 17.1 139 26.7 22.1 121 LILY LAKE 9156 24.5 14.4 170 25.4 19.5 130 MONTE CRISTO 8960 43.7 30.5 143 41.5 28.0 148 SALT RIVER SUMMIT 7760 19.4 14.3 136 24.5 20.4 120 TRIAL LAKE 9992 41.6 26.4 158 38.0 27.3 139 ----- ----- Basin wide percent of average 152 138 ----------------------------------------------------------------------------- -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.