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 TUESDAY: MAY 11 , 2010 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 3.5 8.7 40 16.1 25.2 64 COTTONWOOD CREEK 7670 15.6 16.2 96 26.7 33.2 80 GRAND TARGHEE 9260 44.8 -M * 34.8 -M * GRANITE CREEK 6770 3.5 9.7 36 15.0 23.1 65 GRASSY LAKE 7265 20.3 29.3 69 31.0 42.2 73 GROS VENTRE SUMMIT 8750 9.0 11.3 80 11.6 16.0 73 GUNSIGHT PASS 9820 11.5 -M * 14.7 -M * LEWIS LAKE DIVIDE 7850 18.6 31.4 59 26.2 42.8 61 PHILLIPS BENCH 8200 18.3 26.4 69 24.8 34.2 73 SALT RIVER SUMMIT 7760 6.5 7.1 92 15.1 22.4 67 SNAKE RIVER STATION 6920 .6 8.2 7 19.5 26.4 74 SPRING CREEK DIVIDE 9000 21.7 26.6 82 21.8 31.1 70 THUMB DIVIDE 7980 7.4 11.7 63 16.6 22.9 72 TOGWOTEE PASS 9580 23.6 28.0 84 -M 30.2 * TWO OCEAN PLATEAU 9240 26.7 31.4 85 22.2 33.4 66 WILLOW CREEK 8380 21.9 27.6 79 34.0 39.3 87 ----- ----- Basin wide percent of average 72 72 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 17.6 25.9 68 17.6 24.6 72 BLACK BEAR 8170 28.4 38.1 75 31.6 47.3 67 CANYON 7870 7.7 8.6 90 14.2 18.5 77 FISHER CREEK 9100 27.3 37.4 73 29.4 43.4 68 MADISON PLATEAU 7750 17.0 21.5 79 25.0 31.5 79 NORTHEAST ENTRANCE 7350 1.3 5.0 26 11.5 15.6 74 PARKER PEAK 9400 21.8 24.4 89 16.6 20.6 81 SYLVAN LAKE 8420 14.2 21.8 65 22.0 25.9 85 THUMB DIVIDE 7980 7.4 11.7 63 16.6 22.9 72 TWO OCEAN PLATEAU 9240 26.7 31.4 85 22.2 33.4 66 WHISKEY CREEK 6800 9.7 12.1 80 16.2 25.1 65 WHITE MILL 8700 19.7 25.8 76 20.4 32.4 63 WOLVERINE 7650 .0 4.7 0 9.5 16.1 59 ----- ----- Basin wide percent of average 74 71 WIND RIVER BURROUGHS CREEK 8750 11.2 11.4 98 12.5 20.3 62 COLD SPRINGS 9630 6.4 4.2 152 14.7 15.0 98 DEER PARK 9700 19.5 16.3 120 24.6 28.1 88 HOBBS PARK 10100 21.6 17.3 125 22.6 18.3 123 LITTLE WARM 9370 9.2 8.9 103 13.0 17.9 73 SOUTH PASS 9040 16.3 15.7 104 22.1 23.9 92 ST. LAWRENCE ALT 8620 6.4 4.8 133 15.7 13.2 119 TOGWOTEE PASS 9580 23.6 28.0 84 -M 30.2 * TOWNSEND CREEK 8700 12.5 7.0 179 19.7 16.7 118 ----- ----- Basin wide percent of average 112 94 BIGHORN BASIN BALD MTN. 9380 17.6 23.6 75 14.9 22.7 66 BEAR TRAP MEADOW 8200 4.3 1.4 307 11.4 11.9 96 BLACKWATER 9780 22.3 28.7 78 21.0 26.0 81 BONE SPRINGS DIV 9350 14.4 17.2 84 14.4 19.6 73 EVENING STAR 9200 21.3 33.2 64 25.6 31.2 82 GRAVE SPRINGS 8550 11.2 9.6 117 15.6 14.2 110 KIRWIN 9550 12.1 12.1 100 14.3 15.3 93 MARQUETTE 8760 9.5 9.9 96 13.0 15.1 86 MIDDLE POWDER 7760 13.1 12.4 106 12.4 16.9 73 OWL CREEK 8975 1.9 3.1 61 9.6 9.1 105 POWDER RIVER PASS 9480 8.9 9.2 97 14.8 17.0 87 SHELL CREEK 9580 16.0 16.9 95 15.6 18.0 87 SYLVAN LAKE 8420 14.2 21.8 65 22.0 25.9 85 SYLVAN ROAD 7120 .0 4.8 0 15.9 21.4 74 TIMBER CREEK 7950 3.0 3.3 91 10.8 11.8 92 YOUNTS PEAK 8350 13.0 16.8 77 13.2 19.7 67 ----- ----- Basin wide percent of average 82 83 SHOSHONE RIVER BLACKWATER 9780 22.3 28.7 78 21.0 26.0 81 EVENING STAR 9200 21.3 33.2 64 25.6 31.2 82 KIRWIN 9550 12.1 12.1 100 14.3 15.3 93 MARQUETTE 8760 9.5 9.9 96 13.0 15.1 86 SYLVAN LAKE 8420 14.2 21.8 65 22.0 25.9 85 SYLVAN ROAD 7120 .0 4.8 0 15.9 21.4 74 YOUNTS PEAK 8350 13.0 16.8 77 13.2 19.7 67 ----- ----- Basin wide percent of average 73 81 POWDER-TONGUE BEAR TRAP MEADOW 8200 4.3 1.4 307 11.4 11.9 96 BIG GOOSE 7990 11.0 10.1 109 15.1 14.2 106 BONE SPRINGS DIV 9350 14.4 17.2 84 14.4 19.6 73 BURGESS JUNCTION 7880 13.4 11.7 115 15.2 16.5 92 CLOUD PEAK RESERVOIR 9860 17.1 15.6 110 16.8 18.6 90 DOME LAKE 8880 11.7 11.6 101 16.8 18.1 93 GRAVE SPRINGS 8550 11.2 9.6 117 15.6 14.2 110 HANSEN SAWMILL 8360 3.6 3.5 103 11.5 11.9 97 MIDDLE POWDER 7760 13.1 12.4 106 12.4 16.9 73 POWDER RIVER PASS 9480 8.9 9.2 97 14.8 17.0 87 SUCKER CREEK 8880 15.3 11.6 132 19.2 18.8 102 TIE CREEK 6870 3.7 2.5 148 15.5 14.7 105 ----- ----- Basin wide percent of average 110 93 BELLE FOURCHE BLIND PARK 6890 2.3 1.6 144 17.1 15.3 112 COLE CANYON 5910 3.3 1.7 194 15.7 10.7 147 NORTH RAPID CREEK 6130 .8 1.3 62 16.0 12.3 130 ----- ----- Basin wide percent of average 139 127 UPPER N. PLATTE RIVER COLUMBINE 9160 17.6 16.3 108 27.7 30.2 92 DIVIDE PEAK 8880 20.8 15.5 134 29.0 25.3 115 ELK RIVER 8700 13.8 10.3 134 24.7 24.0 103 JOE WRIGHT 10120 -M 24.7 * -M 31.6 * NORTH FRENCH CREEK 10130 42.8 34.2 125 42.6 31.3 136 OLD BATTLE 10000 41.2 36.8 112 43.8 41.4 106 SAGE CREEK BASIN 7850 5.6 9.0 62 15.7 14.7 107 SOUTH BRUSH CREEK 8440 12.4 8.3 149 24.5 21.3 115 TOWER 10500 41.1 52.3 79 40.3 46.9 86 WEBBER SPRINGS 9250 23.7 21.2 112 34.2 32.4 106 WILLOW CREEK PASS 9540 12.2 12.8 95 15.7 16.6 95 ----- ----- Basin wide percent of average 107 105 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 24.7 25.7 96 28.0 28.4 99 CASPER MTN. 7900 16.2 14.1 115 19.2 21.0 91 DEADMAN HILL 10220 -M 19.1 * -M 22.2 * DEER PARK 9700 19.5 16.3 120 24.6 28.1 88 LAPRELE CREEK 8375 6.1 4.8 127 17.2 17.6 98 RENO HILL 8400 16.7 11.8 142 23.9 21.7 110 ROACH 9700 21.2 15.7 135 27.1 23.7 114 SAND LAKE 10050 39.0 36.6 107 38.8 31.0 125 SOUTH PASS 9040 16.3 15.7 104 22.1 23.9 92 WINDY PEAK 7900 6.8 2.7 252 16.3 14.6 112 ----- ----- Basin wide percent of average 116 103 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 2.0 0 18.5 19.4 95 DIVIDE PEAK 8880 20.8 15.5 134 29.0 25.3 115 OLD BATTLE 10000 41.2 36.8 112 43.8 41.4 106 SANDSTONE RS 8150 7.0 5.8 121 21.4 22.9 93 WHISKEY PARK 8950 27.1 28.6 95 37.6 35.3 107 ----- ----- Basin wide percent of average 108 104 UPPER GREEN RIVER BIG SANDY OPENING 9080 9.3 10.9 85 12.4 16.8 74 BLIND BULL SUM 8650 20.4 26.2 78 15.7 26.1 60 EAST RIM DIVIDE 7930 .4 10.9 4 9.0 14.5 62 ELKHART PARK G.S. 9400 7.9 10.9 72 11.5 16.9 68 GROS VENTRE SUMMIT 8750 9.0 11.3 80 11.6 16.0 73 GUNSIGHT PASS 9820 11.5 -M * 14.7 -M * KENDALL R.S. 7740 .3 6.2 5 10.6 17.2 62 LOOMIS PARK 8240 4.5 11.5 39 12.9 20.7 62 NEW FORK LAKE 8340 1.4 5.6 25 8.4 14.1 60 POCKET CREEK 9360 8.7 -M * 14.2 -M * SNIDER BASIN 8060 5.7 9.7 59 14.0 19.1 73 SPRING CREEK DIVIDE 9000 21.7 26.6 82 21.8 31.1 70 TRIPLE PEAK 8500 16.2 19.9 81 25.0 29.7 84 ----- ----- Basin wide percent of average 65 69 LOWER GREEN RIVER HAMS FORK 7840 .4 2.9 14 12.1 15.5 78 HEWINTA 9519 7.5 6.2 121 16.3 18.6 88 HICKERSON PARK 9145 1.3 3.3 39 13.8 11.0 125 HOLE-IN-ROCK 9150 .2 2.8 7 12.7 10.5 121 INDIAN CREEK 9425 19.7 25.7 77 20.5 30.5 67 KELLEY R.S. 8180 8.8 11.1 79 17.0 24.4 70 STEEL CREEK PARK 10200 19.3 18.8 103 20.3 21.2 96 ----- ----- Basin wide percent of average 81 86 UPPER BEAR RIVER BUG LAKE 7950 11.1 13.6 82 18.0 23.3 77 HAYDEN FORK 9212 6.1 9.5 64 22.5 26.2 86 KELLEY R.S. 8180 8.8 11.1 79 17.0 24.4 70 LILY LAKE 9156 10.0 8.1 123 18.5 22.1 84 MONTE CRISTO 8960 16.9 25.0 68 22.7 31.6 72 SALT RIVER SUMMIT 7760 6.5 7.1 92 15.1 22.4 67 TRIAL LAKE 9992 19.7 24.9 79 20.1 30.7 65 ----- ----- Basin wide percent of average 80 74 ----------------------------------------------------------------------------- -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.