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 THURSDAY: APRIL 14 , 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 17.0 145 27.7 22.9 121 COTTONWOOD CREEK 7670 32.5 23.9 136 39.3 29.6 133 GRAND TARGHEE 9260 54.1 -M * 40.9 -M * GRANITE CREEK 6770 24.6 17.2 143 27.0 21.0 129 GRASSY LAKE 7265 44.5 37.1 120 46.1 38.4 120 GROS VENTRE SUMMIT 8750 17.5 14.6 120 17.6 14.0 126 GUNSIGHT PASS 9820 21.4 -M * 20.1 -M * LEWIS LAKE DIVIDE 7850 47.2 36.7 129 -M 39.2 * PHILLIPS BENCH 8200 37.1 30.6 121 36.8 31.1 118 SALT RIVER SUMMIT 7760 19.4 14.5 134 24.4 20.2 121 SNAKE RIVER STATION 6920 -M 17.7 * 29.7 23.9 124 SPRING CREEK DIVIDE 9000 39.4 28.4 139 36.0 28.4 127 THUMB DIVIDE 7980 25.4 18.8 135 23.2 20.4 114 TOGWOTEE PASS 9580 34.1 26.6 128 35.4 26.7 133 TWO OCEAN PLATEAU 9240 -M 30.4 * -M 29.8 * WILLOW CREEK 8380 42.5 31.8 134 46.1 34.7 133 ----- ----- Basin wide percent of average 131 125 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 30.4 25.4 120 29.1 21.7 134 BLACK BEAR 8170 52.2 40.9 128 50.3 43.2 116 CANYON 7870 19.7 14.0 141 21.2 16.5 128 FISHER CREEK 9100 -M 37.0 * -M 39.0 * MADISON PLATEAU 7750 34.0 26.2 130 36.1 28.8 125 NORTHEAST ENTRANCE 7350 16.1 10.8 149 17.9 13.6 132 PARKER PEAK 9400 33.8 23.3 145 29.1 17.7 164 SYLVAN LAKE 8420 28.8 24.2 119 32.4 22.6 143 THUMB DIVIDE 7980 25.4 18.8 135 23.2 20.4 114 TWO OCEAN PLATEAU 9240 -M 30.4 * -M 29.8 * WHISKEY CREEK 6800 23.1 17.8 130 26.2 22.5 116 WHITE MILL 8700 32.6 25.9 126 32.7 29.0 113 WOLVERINE 7650 16.6 11.1 150 16.7 13.8 121 ----- ----- Basin wide percent of average 131 126 WIND RIVER BURROUGHS CREEK 8750 19.2 15.1 127 20.0 17.6 114 CASTLE CREEK 8400 8.1 -M * 9.9 -M * COLD SPRINGS 9630 9.9 7.4 134 10.9 12.0 91 DEER PARK 9700 20.8 16.7 125 24.3 24.0 101 HOBBS PARK 10100 18.2 16.7 109 16.0 14.5 110 LITTLE WARM 9370 14.5 12.5 116 15.0 14.8 101 SOUTH PASS 9040 18.4 17.7 104 16.2 20.2 80 ST. LAWRENCE ALT 8620 6.2 7.4 84 9.6 10.1 95 TOGWOTEE PASS 9580 34.1 26.6 128 35.4 26.7 133 TOWNSEND CREEK 8700 10.0 9.8 102 12.9 13.3 97 ----- ----- Basin wide percent of average 116 105 BIGHORN BASIN BALD MTN. 9380 26.9 21.7 124 21.8 19.0 115 BEAR TRAP MEADOW 8200 9.7 4.7 206 9.8 9.3 105 BLACKWATER 9780 31.6 26.7 118 30.1 22.5 134 BONE SPRINGS DIV 9350 23.1 17.6 131 18.9 16.2 117 EVENING STAR 9200 37.4 31.9 117 39.5 27.4 144 GRAVE SPRINGS 8550 10.4 10.5 99 10.6 11.3 94 KIRWIN 9550 15.6 12.3 127 16.5 12.4 133 MARQUETTE 8760 5.5 -M * 8.4 11.3 74 MIDDLE POWDER 7760 11.1 13.9 80 12.0 13.7 88 OWL CREEK 8975 7.9 5.2 152 8.2 6.8 121 POWDER RIVER PASS 9480 17.1 11.8 145 19.9 13.7 145 SHELL CREEK 9580 19.8 16.0 124 17.8 14.7 121 SYLVAN LAKE 8420 28.8 24.2 119 32.4 22.6 143 SYLVAN ROAD 7120 17.7 12.3 144 23.8 18.9 126 TIMBER CREEK 7950 6.4 5.6 114 7.6 8.5 89 YOUNTS PEAK 8350 21.4 18.0 119 18.8 17.4 108 ----- ----- Basin wide percent of average 123 121 SHOSHONE RIVER BLACKWATER 9780 31.6 26.7 118 30.1 22.5 134 EVENING STAR 9200 37.4 31.9 117 39.5 27.4 144 KIRWIN 9550 15.6 12.3 127 16.5 12.4 133 MARQUETTE 8760 5.5 -M * 8.4 11.3 74 SYLVAN LAKE 8420 28.8 24.2 119 32.4 22.6 143 SYLVAN ROAD 7120 17.7 12.3 144 23.8 18.9 126 YOUNTS PEAK 8350 21.4 18.0 119 18.8 17.4 108 ----- ----- Basin wide percent of average 122 128 POWDER-TONGUE BEAR TRAP MEADOW 8200 9.7 4.7 206 9.8 9.3 105 BIG GOOSE 7990 10.2 12.3 83 12.0 10.4 115 BONE SPRINGS DIV 9350 23.1 17.6 131 18.9 16.2 117 BURGESS JUNCTION 7880 12.8 13.2 97 13.7 13.5 101 CLOUD PEAK RESERVOIR 9860 18.8 15.1 125 17.6 14.5 121 DOME LAKE 8880 15.8 13.9 114 15.2 14.6 104 GRAVE SPRINGS 8550 10.4 10.5 99 10.6 11.3 94 HANSEN SAWMILL 8360 8.8 6.1 144 9.9 9.3 106 LITTLE GOOSE 8870 11.7 -M * 16.1 -M * MIDDLE POWDER 7760 11.1 13.9 80 12.0 13.7 88 POWDER RIVER PASS 9480 17.1 11.8 145 19.9 13.7 145 SOLDIER PARK 8720 10.0 -M * 10.8 -M * SUCKER CREEK 8880 15.2 13.4 113 16.8 15.1 111 TIE CREEK 6870 7.2 5.1 141 11.9 11.3 105 ----- ----- Basin wide percent of average 116 110 BELLE FOURCHE BLIND PARK 6890 8.9 7.7 116 17.8 12.2 146 COLE CANYON 5910 7.0 7.1 99 13.2 7.6 174 NORTH RAPID CREEK 6130 6.6 8.8 75 14.8 9.5 156 ----- ----- Basin wide percent of average 95 156 UPPER N. PLATTE RIVER CINNABAR PARK 9574 27.2 17.7 154 35.4 21.4 165 COLUMBINE 9160 37.0 24.8 149 38.1 27.1 141 DIVIDE PEAK 8880 27.5 20.8 132 31.7 22.3 142 ELK RIVER 8700 26.9 19.8 136 29.2 21.1 138 JOE WRIGHT 10120 36.4 23.5 155 38.9 27.0 144 NORTH FRENCH CREEK 10130 51.6 32.4 159 -M 26.7 * OLD BATTLE 10000 48.6 34.5 141 46.8 37.0 126 SAGE CREEK BASIN 7850 21.7 12.1 179 21.3 12.9 165 SOUTH BRUSH CREEK 8440 20.4 13.3 153 24.7 18.0 137 TOWER 10500 60.9 49.3 124 47.6 41.4 115 WEBBER SPRINGS 9250 34.2 26.2 131 39.6 28.8 138 WILLOW CREEK PASS 9540 22.3 13.5 165 19.8 14.0 141 ----- ----- Basin wide percent of average 144 138 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 35.0 26.3 133 33.6 24.2 139 CASPER MTN. 7900 11.9 16.6 72 15.9 16.5 96 DEADMAN HILL 10220 23.2 18.2 127 24.2 18.6 130 DEER PARK 9700 20.8 16.7 125 24.3 24.0 101 LAPRELE CREEK 8375 13.6 10.4 131 15.7 14.1 111 RENO HILL 8400 15.8 15.8 100 19.0 17.1 111 ROACH 9700 22.2 18.4 121 25.5 20.3 126 SAND LAKE 10050 41.6 34.9 119 -M 26.4 * SOUTH PASS 9040 18.4 17.7 104 16.2 20.2 80 WINDY PEAK 7900 10.7 8.1 132 14.7 11.7 126 ----- ----- Basin wide percent of average 116 113 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 8.9 * 17.5 17.1 102 DIVIDE PEAK 8880 27.5 20.8 132 31.7 22.3 142 OLD BATTLE 10000 48.6 34.5 141 46.8 37.0 126 SANDSTONE RS 8150 20.4 13.6 150 -M 20.0 * WHISKEY PARK 8950 -M 30.7 * -M 30.9 * ----- ----- Basin wide percent of average 140 126 UPPER GREEN RIVER BIG SANDY OPENING 9080 17.6 15.3 115 17.9 14.4 124 BLIND BULL SUM 8650 38.6 28.9 134 26.2 23.7 111 EAST RIM DIVIDE 7930 17.5 13.9 126 15.5 12.9 120 ELKHART PARK G.S. 9400 16.3 14.0 116 16.0 14.5 110 GROS VENTRE SUMMIT 8750 17.5 14.6 120 17.6 14.0 126 GUNSIGHT PASS 9820 21.4 -M * 20.1 -M * KENDALL R.S. 7740 14.5 13.7 106 17.5 15.5 113 LOOMIS PARK 8240 23.4 17.2 136 23.8 18.6 128 NEW FORK LAKE 8340 14.3 11.4 125 13.0 12.2 107 POCKET CREEK 9360 15.2 -M * 16.9 -M * SNIDER BASIN 8060 22.3 15.0 149 21.0 17.4 121 SPRING CREEK DIVIDE 9000 39.4 28.4 139 36.0 28.4 127 TRIPLE PEAK 8500 37.7 25.9 146 38.1 26.6 143 ----- ----- Basin wide percent of average 131 122 LOWER GREEN RIVER HAMS FORK 7840 16.7 10.2 164 16.7 13.3 126 HEWINTA 9519 14.5 12.4 117 19.6 16.1 122 HICKERSON PARK 9145 7.9 8.3 95 11.9 8.9 134 HOLE-IN-ROCK 9150 9.7 7.3 133 13.3 8.4 158 INDIAN CREEK 9425 35.4 29.6 120 30.1 27.5 109 KELLEY R.S. 8180 23.8 17.3 138 26.7 22.0 121 STEEL CREEK PARK 10200 20.4 17.2 119 22.9 18.2 126 ----- ----- Basin wide percent of average 126 123 UPPER BEAR RIVER BUG LAKE 7950 33.6 21.7 155 32.9 20.7 159 HAYDEN FORK 9212 26.7 16.6 161 33.3 22.9 145 KELLEY R.S. 8180 23.8 17.3 138 26.7 22.0 121 LILY LAKE 9156 24.7 14.5 170 25.3 19.2 132 MONTE CRISTO 8960 43.3 30.6 142 41.2 27.7 149 SALT RIVER SUMMIT 7760 19.4 14.5 134 24.4 20.2 121 TRIAL LAKE 9992 41.3 26.3 157 37.9 27.0 140 ----- ----- Basin wide percent of average 150 139 ----------------------------------------------------------------------------- -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.