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: MARCH 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 18.1 17.0 106 21.0 19.7 107 COTTONWOOD CREEK 7670 23.9 20.6 116 31.7 24.5 129 GRAND TARGHEE 9260 42.1 -M * -M -M * GRANITE CREEK 6770 19.3 17.4 111 20.5 18.4 111 GRASSY LAKE 7265 33.6 31.9 105 35.7 32.8 109 GROS VENTRE SUMMIT 8750 13.5 12.5 108 13.0 11.5 113 GUNSIGHT PASS 9820 15.3 -M * 15.2 -M * LEWIS LAKE DIVIDE 7850 32.9 31.9 103 -M 33.5 * PHILLIPS BENCH 8200 27.2 25.8 105 27.8 26.2 106 SALT RIVER SUMMIT 7760 15.6 13.0 120 19.7 16.8 117 SNAKE RIVER STATION 6920 -M 17.8 * 23.1 20.5 113 SPRING CREEK DIVIDE 9000 30.6 23.8 129 29.4 23.8 124 THUMB DIVIDE 7980 18.3 16.9 108 17.7 17.1 104 TOGWOTEE PASS 9580 25.6 22.2 115 27.1 22.0 123 TWO OCEAN PLATEAU 9240 -M 24.9 * -M 25.0 * WILLOW CREEK 8380 31.4 27.3 115 35.7 28.8 124 ----- ----- Basin wide percent of average 111 115 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 22.3 21.4 104 21.4 18.2 118 BLACK BEAR 8170 38.9 35.6 109 37.2 35.9 104 CANYON 7870 14.8 12.4 119 15.9 13.9 114 FISHER CREEK 9100 35.3 31.7 111 34.0 32.7 104 MADISON PLATEAU 7750 24.3 22.7 107 26.3 23.7 111 NORTHEAST ENTRANCE 7350 12.2 10.5 116 13.5 11.4 118 PARKER PEAK 9400 25.2 19.6 129 -M 14.6 * SYLVAN LAKE 8420 20.8 20.1 103 24.1 19.0 127 THUMB DIVIDE 7980 18.3 16.9 108 17.7 17.1 104 TWO OCEAN PLATEAU 9240 -M 24.9 * -M 25.0 * WHISKEY CREEK 6800 17.8 15.7 113 19.9 18.7 106 WHITE MILL 8700 24.4 21.9 111 24.8 24.2 102 WOLVERINE 7650 13.3 11.3 118 13.1 11.8 111 ----- ----- Basin wide percent of average 112 109 WIND RIVER BURROUGHS CREEK 8750 13.7 13.4 102 14.4 14.6 99 CASTLE CREEK 8400 6.4 -M * 7.1 -M * COLD SPRINGS 9630 7.7 7.9 97 7.4 9.0 82 DEER PARK 9700 16.8 15.3 110 19.6 19.3 102 HOBBS PARK 10100 12.8 12.9 99 11.2 10.6 106 LITTLE WARM 9370 11.0 10.3 107 11.0 11.6 95 SOUTH PASS 9040 15.9 15.2 105 13.9 16.0 87 ST. LAWRENCE ALT 8620 4.5 6.4 70 6.2 7.5 83 TOGWOTEE PASS 9580 25.6 22.2 115 27.1 22.0 123 TOWNSEND CREEK 8700 7.9 7.5 105 9.8 9.6 102 ----- ----- Basin wide percent of average 104 100 BIGHORN BASIN BALD MTN. 9380 19.9 17.2 116 16.5 15.1 109 BEAR TRAP MEADOW 8200 7.1 4.8 148 7.3 6.9 106 BLACKWATER 9780 22.6 22.0 103 22.1 18.3 121 BONE SPRINGS DIV 9350 16.7 14.1 118 13.9 12.5 111 EVENING STAR 9200 27.8 26.8 104 30.3 23.0 132 GRAVE SPRINGS 8550 7.4 7.9 94 7.5 8.5 88 KIRWIN 9550 10.1 9.9 102 11.2 9.8 114 MARQUETTE 8760 2.5 -M * 5.6 8.0 70 MIDDLE POWDER 7760 8.2 9.8 84 10.0 10.4 96 OWL CREEK 8975 5.3 4.5 118 5.1 4.8 106 POWDER RIVER PASS 9480 12.2 9.4 130 14.3 10.7 134 SHELL CREEK 9580 14.4 12.6 114 13.0 11.5 113 SYLVAN LAKE 8420 20.8 20.1 103 24.1 19.0 127 SYLVAN ROAD 7120 13.9 12.0 116 18.0 16.3 110 TIMBER CREEK 7950 3.5 4.6 76 4.2 5.9 71 YOUNTS PEAK 8350 15.4 15.5 99 13.4 14.5 92 ----- ----- Basin wide percent of average 107 111 SHOSHONE RIVER BLACKWATER 9780 22.6 22.0 103 22.1 18.3 121 EVENING STAR 9200 27.8 26.8 104 30.3 23.0 132 KIRWIN 9550 10.1 9.9 102 11.2 9.8 114 MARQUETTE 8760 2.5 -M * 5.6 8.0 70 SYLVAN LAKE 8420 20.8 20.1 103 24.1 19.0 127 SYLVAN ROAD 7120 13.9 12.0 116 18.0 16.3 110 YOUNTS PEAK 8350 15.4 15.5 99 13.4 14.5 92 ----- ----- Basin wide percent of average 104 115 POWDER-TONGUE BEAR TRAP MEADOW 8200 7.1 4.8 148 7.3 6.9 106 BIG GOOSE 7990 6.8 8.4 81 8.5 7.2 118 BONE SPRINGS DIV 9350 16.7 14.1 118 13.9 12.5 111 BURGESS JUNCTION 7880 9.5 9.8 97 10.4 10.2 102 CLOUD PEAK RESERVOIR 9860 13.6 11.1 123 12.5 10.6 118 DOME LAKE 8880 10.9 10.3 106 11.0 11.0 100 GRAVE SPRINGS 8550 7.4 7.9 94 7.5 8.5 88 HANSEN SAWMILL 8360 6.2 5.6 111 6.8 6.8 100 LITTLE GOOSE 8870 7.6 -M * 11.9 -M * MIDDLE POWDER 7760 8.2 9.8 84 10.0 10.4 96 POWDER RIVER PASS 9480 12.2 9.4 130 14.3 10.7 134 SOLDIER PARK 8720 6.4 -M * 7.6 -M * SUCKER CREEK 8880 11.1 9.9 112 12.2 11.4 107 TIE CREEK 6870 6.0 5.7 105 8.6 8.4 102 ----- ----- Basin wide percent of average 108 107 BELLE FOURCHE BLIND PARK 6890 9.4 8.0 118 15.2 9.9 154 COLE CANYON 5910 7.5 6.1 123 10.8 5.9 183 NORTH RAPID CREEK 6130 8.7 7.3 119 13.0 7.8 167 ----- ----- Basin wide percent of average 120 165 UPPER N. PLATTE RIVER CINNABAR PARK 9574 22.0 16.8 131 22.2 18.1 123 COLUMBINE 9160 30.2 23.3 130 31.2 22.4 139 DIVIDE PEAK 8880 20.2 17.0 119 24.1 18.3 132 ELK RIVER 8700 22.7 17.3 131 23.8 17.3 138 JOE WRIGHT 10120 25.3 18.5 137 30.2 21.6 140 NORTH FRENCH CREEK 10130 39.0 24.7 158 32.2 21.7 148 OLD BATTLE 10000 37.9 28.4 133 28.9 30.6 94 SAGE CREEK BASIN 7850 18.7 9.9 189 16.6 10.6 157 SOUTH BRUSH CREEK 8440 16.6 11.2 148 19.4 14.2 137 TOWER 10500 49.0 40.2 122 45.9 34.2 134 WEBBER SPRINGS 9250 27.5 23.5 117 32.3 23.6 137 WILLOW CREEK PASS 9540 16.3 10.3 158 15.2 11.1 137 ----- ----- Basin wide percent of average 135 132 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 27.6 20.4 135 27.8 18.9 147 CASPER MTN. 7900 10.3 12.2 84 12.7 12.0 106 DEADMAN HILL 10220 18.7 13.9 135 19.3 14.4 134 DEER PARK 9700 16.8 15.3 110 19.6 19.3 102 LAPRELE CREEK 8375 11.8 9.7 122 13.0 10.8 120 RENO HILL 8400 13.0 11.5 113 15.2 12.4 123 ROACH 9700 18.1 14.9 121 21.6 16.1 134 SAND LAKE 10050 32.8 27.7 118 31.3 20.7 151 SOUTH PASS 9040 15.9 15.2 105 13.9 16.0 87 WINDY PEAK 7900 9.9 6.8 146 12.2 9.1 134 ----- ----- Basin wide percent of average 118 125 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 10.8 * -M 13.4 * DIVIDE PEAK 8880 20.2 17.0 119 24.1 18.3 132 OLD BATTLE 10000 37.9 28.4 133 28.9 30.6 94 SANDSTONE RS 8150 13.9 13.7 101 22.8 16.8 136 WHISKEY PARK 8950 -M 26.3 * 35.5 25.1 141 ----- ----- Basin wide percent of average 122 123 UPPER GREEN RIVER BIG SANDY OPENING 9080 13.4 13.0 103 13.7 12.1 113 BLIND BULL SUM 8650 26.8 25.0 107 19.5 20.1 97 EAST RIM DIVIDE 7930 13.9 11.8 118 12.0 10.9 110 ELKHART PARK G.S. 9400 12.0 12.0 100 11.9 11.7 102 GROS VENTRE SUMMIT 8750 13.5 12.5 108 13.0 11.5 113 GUNSIGHT PASS 9820 15.3 -M * 15.2 -M * KENDALL R.S. 7740 12.5 13.5 93 14.0 13.3 105 LOOMIS PARK 8240 18.5 15.7 118 18.8 15.8 119 NEW FORK LAKE 8340 11.7 10.2 115 10.7 10.2 105 POCKET CREEK 9360 10.6 -M * 13.0 -M * SNIDER BASIN 8060 18.7 13.3 141 17.7 14.5 122 SPRING CREEK DIVIDE 9000 30.6 23.8 129 29.4 23.8 124 TRIPLE PEAK 8500 27.2 22.4 121 29.4 22.2 132 ----- ----- Basin wide percent of average 115 114 LOWER GREEN RIVER HAMS FORK 7840 15.6 11.9 131 14.3 11.0 130 HEWINTA 9519 11.1 10.0 111 14.6 12.5 117 HICKERSON PARK 9145 6.9 6.3 110 8.7 6.7 130 HOLE-IN-ROCK 9150 7.3 6.2 118 8.9 6.3 141 INDIAN CREEK 9425 28.0 24.3 115 25.1 22.5 112 KELLEY R.S. 8180 18.9 15.2 124 21.9 18.2 120 STEEL CREEK PARK 10200 14.9 13.7 109 17.4 13.9 125 ----- ----- Basin wide percent of average 117 122 UPPER BEAR RIVER BUG LAKE 7950 26.4 18.5 143 26.2 17.2 152 HAYDEN FORK 9212 20.4 14.4 142 26.0 18.3 142 KELLEY R.S. 8180 18.9 15.2 124 21.9 18.2 120 LILY LAKE 9156 18.0 11.6 155 19.2 15.2 126 MONTE CRISTO 8960 33.2 26.8 124 33.0 22.6 146 SALT RIVER SUMMIT 7760 15.6 13.0 120 19.7 16.8 117 TRIAL LAKE 9992 31.6 22.3 142 30.4 22.1 138 ----- ----- Basin wide percent of average 135 135 ----------------------------------------------------------------------------- -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.