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 FRIDAY: APRIL 15 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 24.7 16.8 147 27.8 22.9 121 COTTONWOOD CREEK 7670 33.1 23.8 139 39.6 29.8 133 GRAND TARGHEE 9260 54.5 -M * 41.3 -M * GRANITE CREEK 6770 24.6 17.0 145 27.1 21.1 128 GRASSY LAKE 7265 45.1 37.0 122 46.7 38.5 121 GROS VENTRE SUMMIT 8750 17.4 14.6 119 17.5 14.0 125 GUNSIGHT PASS 9820 21.6 -M * 20.0 -M * LEWIS LAKE DIVIDE 7850 47.6 36.7 130 -M 39.4 * PHILLIPS BENCH 8200 37.3 30.6 122 37.2 31.2 119 SALT RIVER SUMMIT 7760 19.4 14.4 135 24.3 20.3 120 SNAKE RIVER STATION 6920 -M 17.5 * 30.2 24.0 126 SPRING CREEK DIVIDE 9000 39.5 28.5 139 36.2 28.5 127 THUMB DIVIDE 7980 25.4 18.7 136 23.3 20.5 114 TOGWOTEE PASS 9580 34.4 26.7 129 35.8 26.8 134 TWO OCEAN PLATEAU 9240 -M 30.6 * -M 29.9 * WILLOW CREEK 8380 42.5 31.9 133 46.3 34.9 133 ----- ----- Basin wide percent of average 132 125 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 30.3 25.5 119 29.1 21.8 133 BLACK BEAR 8170 51.9 40.9 127 50.4 43.3 116 CANYON 7870 19.9 13.9 143 21.3 16.6 128 FISHER CREEK 9100 -M 37.0 * -M 39.2 * MADISON PLATEAU 7750 34.0 26.1 130 36.0 28.9 125 NORTHEAST ENTRANCE 7350 16.1 10.7 150 18.0 13.7 131 PARKER PEAK 9400 33.9 23.4 145 29.2 17.8 164 SYLVAN LAKE 8420 28.8 24.2 119 32.5 22.8 143 THUMB DIVIDE 7980 25.4 18.7 136 23.3 20.5 114 TWO OCEAN PLATEAU 9240 -M 30.6 * -M 29.9 * WHISKEY CREEK 6800 23.1 17.8 130 26.4 22.6 117 WHITE MILL 8700 32.7 26.0 126 32.8 29.1 113 WOLVERINE 7650 16.7 11.0 152 16.7 13.9 120 ----- ----- Basin wide percent of average 131 126 WIND RIVER BURROUGHS CREEK 8750 19.2 15.1 127 20.0 17.7 113 CASTLE CREEK 8400 8.1 -M * 9.9 -M * COLD SPRINGS 9630 9.9 7.1 139 10.9 12.1 90 DEER PARK 9700 20.9 17.1 122 24.4 24.1 101 HOBBS PARK 10100 18.3 16.8 109 16.1 14.7 110 LITTLE WARM 9370 14.5 12.5 116 15.0 14.9 101 SOUTH PASS 9040 18.6 17.7 105 16.2 20.4 79 ST. LAWRENCE ALT 8620 5.9 7.3 81 9.7 10.2 95 TOGWOTEE PASS 9580 34.4 26.7 129 35.8 26.8 134 TOWNSEND CREEK 8700 10.1 9.8 103 12.9 13.4 96 ----- ----- Basin wide percent of average 117 104 BIGHORN BASIN BALD MTN. 9380 27.6 21.9 126 22.4 19.1 117 BEAR TRAP MEADOW 8200 10.1 4.7 215 10.2 9.4 109 BLACKWATER 9780 31.7 26.9 118 30.2 22.6 134 BONE SPRINGS DIV 9350 23.3 17.7 132 19.1 16.3 117 EVENING STAR 9200 37.4 32.0 117 39.5 27.6 143 GRAVE SPRINGS 8550 10.8 10.7 101 11.0 11.4 96 KIRWIN 9550 15.6 12.3 127 16.5 12.5 132 MARQUETTE 8760 5.5 -M * 8.5 11.4 75 MIDDLE POWDER 7760 11.8 14.0 84 12.4 13.9 89 OWL CREEK 8975 7.9 5.2 152 8.2 6.9 119 POWDER RIVER PASS 9480 17.5 11.9 147 20.2 13.8 146 SHELL CREEK 9580 20.2 16.1 125 18.2 14.9 122 SYLVAN LAKE 8420 28.8 24.2 119 32.5 22.8 143 SYLVAN ROAD 7120 17.7 12.1 146 23.9 19.0 126 TIMBER CREEK 7950 6.3 5.7 111 7.6 8.6 88 YOUNTS PEAK 8350 21.4 18.1 118 18.8 17.5 107 ----- ----- Basin wide percent of average 123 121 SHOSHONE RIVER BLACKWATER 9780 31.7 26.9 118 30.2 22.6 134 EVENING STAR 9200 37.4 32.0 117 39.5 27.6 143 KIRWIN 9550 15.6 12.3 127 16.5 12.5 132 MARQUETTE 8760 5.5 -M * 8.5 11.4 75 SYLVAN LAKE 8420 28.8 24.2 119 32.5 22.8 143 SYLVAN ROAD 7120 17.7 12.1 146 23.9 19.0 126 YOUNTS PEAK 8350 21.4 18.1 118 18.8 17.5 107 ----- ----- Basin wide percent of average 121 127 POWDER-TONGUE BEAR TRAP MEADOW 8200 10.1 4.7 215 10.2 9.4 109 BIG GOOSE 7990 10.4 12.4 84 12.3 10.6 116 BONE SPRINGS DIV 9350 23.3 17.7 132 19.1 16.3 117 BURGESS JUNCTION 7880 13.0 13.2 98 13.8 13.6 101 CLOUD PEAK RESERVOIR 9860 19.1 15.3 125 17.9 14.7 122 DOME LAKE 8880 16.0 14.0 114 15.3 14.8 103 GRAVE SPRINGS 8550 10.8 10.7 101 11.0 11.4 96 HANSEN SAWMILL 8360 9.2 6.2 148 10.3 9.3 111 LITTLE GOOSE 8870 11.9 -M * 16.3 -M * MIDDLE POWDER 7760 11.8 14.0 84 12.4 13.9 89 POWDER RIVER PASS 9480 17.5 11.9 147 20.2 13.8 146 SOLDIER PARK 8720 10.2 -M * 11.0 -M * SUCKER CREEK 8880 15.3 13.5 113 16.9 15.2 111 TIE CREEK 6870 7.3 5.3 138 11.9 11.4 104 ----- ----- Basin wide percent of average 118 111 BELLE FOURCHE BLIND PARK 6890 9.5 7.6 125 18.2 12.3 148 COLE CANYON 5910 7.3 7.1 103 13.6 7.7 177 NORTH RAPID CREEK 6130 6.9 8.8 78 15.2 9.6 158 ----- ----- Basin wide percent of average 101 159 UPPER N. PLATTE RIVER CINNABAR PARK 9574 27.6 17.7 156 35.8 21.5 167 COLUMBINE 9160 36.4 24.7 147 38.5 27.2 142 DIVIDE PEAK 8880 27.3 20.9 131 32.0 22.4 143 ELK RIVER 8700 27.1 19.6 138 29.4 21.2 139 JOE WRIGHT 10120 37.9 23.6 161 40.0 27.2 147 NORTH FRENCH CREEK 10130 52.6 32.6 161 -M 26.9 * OLD BATTLE 10000 48.0 34.7 138 46.8 37.2 126 SAGE CREEK BASIN 7850 21.5 12.1 178 21.3 13.0 164 SOUTH BRUSH CREEK 8440 21.2 13.3 159 25.5 18.1 141 TOWER 10500 61.1 49.5 123 47.5 41.7 114 WEBBER SPRINGS 9250 34.2 26.1 131 39.9 28.9 138 WILLOW CREEK PASS 9540 22.8 13.6 168 20.3 14.1 144 ----- ----- Basin wide percent of average 145 138 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 35.4 26.5 134 33.6 24.4 138 CASPER MTN. 7900 12.0 16.8 71 16.3 16.7 98 DEADMAN HILL 10220 24.0 18.3 131 24.8 18.7 133 DEER PARK 9700 20.9 17.1 122 24.4 24.1 101 LAPRELE CREEK 8375 13.7 10.2 134 15.8 14.2 111 RENO HILL 8400 16.4 15.9 103 19.5 17.3 113 ROACH 9700 22.5 18.4 122 25.9 20.4 127 SAND LAKE 10050 42.3 35.0 121 -M 26.5 * SOUTH PASS 9040 18.6 17.7 105 16.2 20.4 79 WINDY PEAK 7900 10.8 8.0 135 14.9 11.8 126 ----- ----- Basin wide percent of average 118 114 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 8.7 * 17.8 17.2 103 DIVIDE PEAK 8880 27.3 20.9 131 32.0 22.4 143 OLD BATTLE 10000 48.0 34.7 138 46.8 37.2 126 SANDSTONE RS 8150 20.8 13.4 155 -M 20.1 * WHISKEY PARK 8950 -M 30.7 * -M 31.0 * ----- ----- Basin wide percent of average 139 126 UPPER GREEN RIVER BIG SANDY OPENING 9080 17.6 15.3 115 17.7 14.5 122 BLIND BULL SUM 8650 38.6 28.9 134 26.2 23.8 110 EAST RIM DIVIDE 7930 17.4 14.0 124 15.4 12.9 119 ELKHART PARK G.S. 9400 16.2 14.0 116 15.9 14.5 110 GROS VENTRE SUMMIT 8750 17.4 14.6 119 17.5 14.0 125 GUNSIGHT PASS 9820 21.6 -M * 20.0 -M * KENDALL R.S. 7740 14.3 13.6 105 17.4 15.5 112 LOOMIS PARK 8240 23.2 17.1 136 23.9 18.7 128 NEW FORK LAKE 8340 14.3 11.3 127 13.0 12.3 106 POCKET CREEK 9360 15.0 -M * 16.7 -M * SNIDER BASIN 8060 22.3 14.9 150 21.1 17.5 121 SPRING CREEK DIVIDE 9000 39.5 28.5 139 36.2 28.5 127 TRIPLE PEAK 8500 37.8 25.9 146 38.2 26.7 143 ----- ----- Basin wide percent of average 131 122 LOWER GREEN RIVER HAMS FORK 7840 17.0 10.0 170 16.8 13.4 125 HEWINTA 9519 14.6 12.3 119 19.5 16.2 120 HICKERSON PARK 9145 7.9 8.3 95 11.7 8.9 131 HOLE-IN-ROCK 9150 9.8 7.3 134 13.2 8.5 155 INDIAN CREEK 9425 35.4 29.6 120 30.1 27.6 109 KELLEY R.S. 8180 23.8 17.2 138 26.6 22.0 121 STEEL CREEK PARK 10200 20.4 17.3 118 23.0 18.3 126 ----- ----- Basin wide percent of average 126 123 UPPER BEAR RIVER BUG LAKE 7950 33.6 21.7 155 32.9 20.8 158 HAYDEN FORK 9212 26.8 16.5 162 33.4 23.1 145 KELLEY R.S. 8180 23.8 17.2 138 26.6 22.0 121 LILY LAKE 9156 24.5 14.5 169 25.4 19.4 131 MONTE CRISTO 8960 43.3 30.6 142 41.4 27.8 149 SALT RIVER SUMMIT 7760 19.4 14.4 135 24.3 20.3 120 TRIAL LAKE 9992 41.4 26.4 157 38.0 27.2 140 ----- ----- Basin wide percent of average 151 138 ----------------------------------------------------------------------------- -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.