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 WEDNESDAY: APRIL 13 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 25.0 17.2 145 27.7 22.8 121 COTTONWOOD CREEK 7670 32.3 24.0 135 39.1 29.5 133 GRAND TARGHEE 9260 53.5 -M * 40.4 -M * GRANITE CREEK 6770 24.8 17.3 143 27.0 21.0 129 GRASSY LAKE 7265 44.4 37.1 120 45.7 38.2 120 GROS VENTRE SUMMIT 8750 17.4 14.6 119 17.5 13.9 126 GUNSIGHT PASS 9820 21.3 -M * 19.7 -M * LEWIS LAKE DIVIDE 7850 47.0 36.7 128 -M 39.1 * PHILLIPS BENCH 8200 37.0 30.5 121 36.8 30.9 119 SALT RIVER SUMMIT 7760 19.3 14.6 132 24.2 20.1 120 SNAKE RIVER STATION 6920 -M 17.9 * 29.6 23.8 124 SPRING CREEK DIVIDE 9000 39.3 28.4 138 36.0 28.3 127 THUMB DIVIDE 7980 25.3 18.9 134 23.1 20.3 114 TOGWOTEE PASS 9580 33.8 26.5 128 35.0 26.5 132 TWO OCEAN PLATEAU 9240 -M 30.3 * -M 29.6 * WILLOW CREEK 8380 42.2 31.8 133 45.8 34.6 132 ----- ----- Basin wide percent of average 130 125 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 30.3 25.3 120 29.1 21.6 135 BLACK BEAR 8170 51.7 40.8 127 49.7 43.0 116 CANYON 7870 19.7 14.1 140 21.2 16.5 128 FISHER CREEK 9100 46.6 36.9 126 44.2 38.8 114 MADISON PLATEAU 7750 33.7 26.2 129 35.6 28.7 124 NORTHEAST ENTRANCE 7350 16.1 10.9 148 17.8 13.6 131 PARKER PEAK 9400 33.7 23.3 145 29.1 17.6 165 SYLVAN LAKE 8420 28.6 24.1 119 31.9 22.5 142 THUMB DIVIDE 7980 25.3 18.9 134 23.1 20.3 114 TWO OCEAN PLATEAU 9240 -M 30.3 * -M 29.6 * WHISKEY CREEK 6800 22.8 17.8 128 26.0 22.5 116 WHITE MILL 8700 32.5 25.9 125 32.6 28.9 113 WOLVERINE 7650 16.7 11.4 146 16.7 13.8 121 ----- ----- Basin wide percent of average 130 124 WIND RIVER BURROUGHS CREEK 8750 18.9 15.2 124 19.7 17.5 113 CASTLE CREEK 8400 7.8 -M * 9.6 -M * COLD SPRINGS 9630 9.8 7.6 129 10.8 11.9 91 DEER PARK 9700 20.7 16.8 123 24.2 23.9 101 HOBBS PARK 10100 18.0 16.8 107 15.9 14.4 110 LITTLE WARM 9370 14.4 12.6 114 14.9 14.6 102 SOUTH PASS 9040 18.4 17.7 104 16.1 20.1 80 ST. LAWRENCE ALT 8620 6.0 7.5 80 9.4 10.0 94 TOGWOTEE PASS 9580 33.8 26.5 128 35.0 26.5 132 TOWNSEND CREEK 8700 9.9 9.8 101 12.9 13.1 98 ----- ----- Basin wide percent of average 115 105 BIGHORN BASIN BALD MTN. 9380 26.5 21.6 123 21.5 18.9 114 BEAR TRAP MEADOW 8200 9.5 4.8 198 9.6 9.2 104 BLACKWATER 9780 31.4 26.6 118 29.9 22.4 133 BONE SPRINGS DIV 9350 22.8 17.5 130 18.7 16.0 117 EVENING STAR 9200 37.3 31.9 117 39.4 27.3 144 GRAVE SPRINGS 8550 9.9 10.5 94 10.2 11.1 92 KIRWIN 9550 15.0 12.3 122 15.9 12.3 129 MARQUETTE 8760 5.1 -M * 8.1 11.2 72 MIDDLE POWDER 7760 11.0 13.8 80 12.0 13.6 88 OWL CREEK 8975 7.2 5.4 133 7.6 6.7 113 POWDER RIVER PASS 9480 17.0 11.8 144 19.7 13.6 145 SHELL CREEK 9580 19.7 16.0 123 17.8 14.6 122 SYLVAN LAKE 8420 28.6 24.1 119 31.9 22.5 142 SYLVAN ROAD 7120 18.0 12.5 144 23.8 18.8 127 TIMBER CREEK 7950 6.1 5.7 107 7.3 8.4 87 YOUNTS PEAK 8350 21.3 18.0 118 18.7 17.3 108 ----- ----- Basin wide percent of average 121 120 SHOSHONE RIVER BLACKWATER 9780 31.4 26.6 118 29.9 22.4 133 EVENING STAR 9200 37.3 31.9 117 39.4 27.3 144 KIRWIN 9550 15.0 12.3 122 15.9 12.3 129 MARQUETTE 8760 5.1 -M * 8.1 11.2 72 SYLVAN LAKE 8420 28.6 24.1 119 31.9 22.5 142 SYLVAN ROAD 7120 18.0 12.5 144 23.8 18.8 127 YOUNTS PEAK 8350 21.3 18.0 118 18.7 17.3 108 ----- ----- Basin wide percent of average 121 127 POWDER-TONGUE BEAR TRAP MEADOW 8200 9.5 4.8 198 9.6 9.2 104 BIG GOOSE 7990 10.2 12.2 84 11.9 10.2 117 BONE SPRINGS DIV 9350 22.8 17.5 130 18.7 16.0 117 BURGESS JUNCTION 7880 12.7 13.1 97 13.5 13.4 101 CLOUD PEAK RESERVOIR 9860 18.6 15.0 124 17.5 14.4 122 DOME LAKE 8880 15.8 13.9 114 15.1 14.5 104 GRAVE SPRINGS 8550 9.9 10.5 94 10.2 11.1 92 HANSEN SAWMILL 8360 8.5 6.3 135 9.6 9.2 104 LITTLE GOOSE 8870 11.6 -M * 16.1 -M * MIDDLE POWDER 7760 11.0 13.8 80 12.0 13.6 88 POWDER RIVER PASS 9480 17.0 11.8 144 19.7 13.6 145 SOLDIER PARK 8720 9.7 -M * 10.6 -M * SUCKER CREEK 8880 15.2 13.4 113 16.8 15.0 112 TIE CREEK 6870 7.2 5.4 133 11.9 11.2 106 ----- ----- Basin wide percent of average 115 110 BELLE FOURCHE BLIND PARK 6890 9.1 7.9 115 17.7 12.1 146 COLE CANYON 5910 7.1 7.2 99 13.2 7.5 176 NORTH RAPID CREEK 6130 6.6 8.9 74 14.8 9.4 157 ----- ----- Basin wide percent of average 95 158 UPPER N. PLATTE RIVER CINNABAR PARK 9574 27.2 17.8 153 35.3 21.3 166 COLUMBINE 9160 35.7 24.8 144 38.0 26.9 141 DIVIDE PEAK 8880 26.9 20.8 129 31.6 22.2 142 ELK RIVER 8700 27.1 19.9 136 29.2 21.0 139 JOE WRIGHT 10120 36.1 23.3 155 38.7 26.9 144 NORTH FRENCH CREEK 10130 51.4 32.2 160 -M 26.6 * OLD BATTLE 10000 47.9 34.4 139 46.7 36.8 127 SAGE CREEK BASIN 7850 22.0 12.1 182 21.2 12.9 164 SOUTH BRUSH CREEK 8440 20.5 13.4 153 24.6 17.9 137 TOWER 10500 60.4 49.1 123 47.5 41.2 115 WEBBER SPRINGS 9250 34.1 26.2 130 39.6 28.6 138 WILLOW CREEK PASS 9540 22.0 13.4 164 19.8 14.0 141 ----- ----- Basin wide percent of average 143 138 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 34.7 26.1 133 33.5 24.1 139 CASPER MTN. 7900 11.9 16.5 72 15.8 16.3 97 DEADMAN HILL 10220 22.7 18.1 125 23.8 18.5 129 DEER PARK 9700 20.7 16.8 123 24.2 23.9 101 LAPRELE CREEK 8375 13.9 10.5 132 15.7 14.0 112 RENO HILL 8400 16.0 15.8 101 19.1 17.0 112 ROACH 9700 22.1 18.3 121 25.5 20.1 127 SAND LAKE 10050 41.4 34.7 119 -M 26.2 * SOUTH PASS 9040 18.4 17.7 104 16.1 20.1 80 WINDY PEAK 7900 10.7 8.2 130 14.7 11.6 127 ----- ----- Basin wide percent of average 116 114 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 9.1 * 17.4 17.0 102 DIVIDE PEAK 8880 26.9 20.8 129 31.6 22.2 142 OLD BATTLE 10000 47.9 34.4 139 46.7 36.8 127 SANDSTONE RS 8150 20.5 13.7 150 -M 19.9 * WHISKEY PARK 8950 -M 30.7 * -M 30.7 * ----- ----- Basin wide percent of average 138 126 UPPER GREEN RIVER BIG SANDY OPENING 9080 17.5 15.3 114 17.6 14.4 122 BLIND BULL SUM 8650 38.3 28.9 133 26.1 23.6 111 EAST RIM DIVIDE 7930 17.6 13.9 127 15.3 12.8 120 ELKHART PARK G.S. 9400 16.0 14.0 114 15.7 14.4 109 GROS VENTRE SUMMIT 8750 17.4 14.6 119 17.5 13.9 126 GUNSIGHT PASS 9820 21.3 -M * 19.7 -M * KENDALL R.S. 7740 14.7 13.8 107 17.3 15.4 112 LOOMIS PARK 8240 23.6 17.2 137 23.7 18.5 128 NEW FORK LAKE 8340 14.3 11.4 125 12.9 12.2 106 POCKET CREEK 9360 14.7 -M * 16.5 -M * SNIDER BASIN 8060 22.4 15.0 149 21.0 17.3 121 SPRING CREEK DIVIDE 9000 39.3 28.4 138 36.0 28.3 127 TRIPLE PEAK 8500 37.7 25.9 146 38.0 26.5 143 ----- ----- Basin wide percent of average 130 122 LOWER GREEN RIVER HAMS FORK 7840 17.2 10.3 167 16.7 13.2 127 HEWINTA 9519 14.1 12.4 114 19.2 16.0 120 HICKERSON PARK 9145 7.8 8.4 93 11.7 8.8 133 HOLE-IN-ROCK 9150 9.7 7.4 131 13.1 8.3 158 INDIAN CREEK 9425 35.5 29.5 120 30.0 27.4 109 KELLEY R.S. 8180 23.8 17.3 138 26.5 21.9 121 STEEL CREEK PARK 10200 20.0 17.1 117 22.6 18.0 126 ----- ----- Basin wide percent of average 125 123 UPPER BEAR RIVER BUG LAKE 7950 33.5 21.8 154 32.7 20.6 159 HAYDEN FORK 9212 26.7 16.7 160 32.9 22.8 144 KELLEY R.S. 8180 23.8 17.3 138 26.5 21.9 121 LILY LAKE 9156 24.4 14.6 167 25.1 19.1 131 MONTE CRISTO 8960 42.9 30.6 140 41.0 27.5 149 SALT RIVER SUMMIT 7760 19.3 14.6 132 24.2 20.1 120 TRIAL LAKE 9992 41.0 26.3 156 37.6 26.9 140 ----- ----- Basin wide percent of average 149 138 ----------------------------------------------------------------------------- -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.