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 SUNDAY: MAY 16 , 2010 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 .2 6.5 3 16.0 25.6 63 COTTONWOOD CREEK 7670 14.6 13.9 105 27.6 33.9 81 GRAND TARGHEE 9260 45.8 -M * 35.1 -M * GRANITE CREEK 6770 .4 7.8 5 15.0 23.6 64 GRASSY LAKE 7265 17.4 26.5 66 30.9 42.9 72 GROS VENTRE SUMMIT 8750 8.3 9.9 84 12.0 16.4 73 GUNSIGHT PASS 9820 11.5 -M * 15.0 -M * LEWIS LAKE DIVIDE 7850 17.7 29.0 61 26.2 43.4 60 PHILLIPS BENCH 8200 16.7 24.1 69 24.9 34.8 72 SALT RIVER SUMMIT 7760 5.1 4.9 104 15.8 22.8 69 SNAKE RIVER STATION 6920 .0 5.7 0 19.3 26.9 72 SPRING CREEK DIVIDE 9000 23.1 24.7 94 23.6 31.6 75 THUMB DIVIDE 7980 4.5 9.7 46 16.6 23.4 71 TOGWOTEE PASS 9580 23.6 27.4 86 -M 30.8 * TWO OCEAN PLATEAU 9240 25.9 30.7 84 22.3 34.1 65 WILLOW CREEK 8380 21.4 25.3 85 34.9 40.1 87 ----- ----- Basin wide percent of average 73 71 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 17.3 25.5 68 17.9 25.2 71 BLACK BEAR 8170 26.5 36.5 73 31.7 48.0 66 CANYON 7870 6.0 7.1 85 14.1 19.0 74 FISHER CREEK 9100 26.1 36.6 71 29.6 44.1 67 MADISON PLATEAU 7750 15.6 19.5 80 25.1 32.1 78 NORTHEAST ENTRANCE 7350 .0 3.3 0 11.5 16.0 72 PARKER PEAK 9400 21.7 24.0 90 16.7 21.2 79 SYLVAN LAKE 8420 13.3 20.3 66 22.1 26.6 83 THUMB DIVIDE 7980 4.5 9.7 46 16.6 23.4 71 TWO OCEAN PLATEAU 9240 25.9 30.7 84 22.3 34.1 65 WHISKEY CREEK 6800 7.8 9.8 80 16.2 25.6 63 WHITE MILL 8700 18.8 24.7 76 20.5 33.1 62 WOLVERINE 7650 .1 3.2 3 9.6 16.7 57 ----- ----- Basin wide percent of average 73 70 WIND RIVER BURROUGHS CREEK 8750 11.3 10.4 109 -M 20.9 * COLD SPRINGS 9630 9.0 3.3 273 17.7 15.5 114 DEER PARK 9700 22.2 17.2 129 27.5 28.8 95 HOBBS PARK 10100 25.5 16.7 153 26.5 18.9 140 LITTLE WARM 9370 10.3 7.8 132 14.5 18.5 78 SOUTH PASS 9040 19.2 14.1 136 25.5 24.5 104 ST. LAWRENCE ALT 8620 9.5 3.7 257 19.1 13.7 139 TOGWOTEE PASS 9580 23.6 27.4 86 -M 30.8 * TOWNSEND CREEK 8700 15.9 5.7 279 24.1 17.2 140 ----- ----- Basin wide percent of average 138 113 BIGHORN BASIN BALD MTN. 9380 18.7 23.0 81 15.9 23.4 68 BEAR TRAP MEADOW 8200 4.8 .7 686 12.4 12.5 99 BLACKWATER 9780 22.7 28.8 79 21.6 26.6 81 BONE SPRINGS DIV 9350 14.8 16.2 91 15.3 20.3 75 EVENING STAR 9200 20.7 32.5 64 26.2 32.0 82 GRAVE SPRINGS 8550 11.8 7.9 149 16.8 14.7 114 KIRWIN 9550 13.0 11.0 118 15.6 15.8 99 MARQUETTE 8760 14.2 8.9 160 16.9 15.8 107 MIDDLE POWDER 7760 13.7 11.1 123 13.2 17.5 75 OWL CREEK 8975 3.1 2.3 135 11.3 9.5 119 POWDER RIVER PASS 9480 8.8 8.1 109 15.2 17.6 86 SHELL CREEK 9580 16.0 16.3 98 16.1 18.6 87 SYLVAN LAKE 8420 13.3 20.3 66 22.1 26.6 83 SYLVAN ROAD 7120 .0 2.7 0 15.8 21.9 72 TIMBER CREEK 7950 5.2 2.2 236 13.3 12.4 107 YOUNTS PEAK 8350 12.6 15.4 82 13.3 20.3 66 ----- ----- Basin wide percent of average 93 85 SHOSHONE RIVER BLACKWATER 9780 22.7 28.8 79 21.6 26.6 81 EVENING STAR 9200 20.7 32.5 64 26.2 32.0 82 KIRWIN 9550 13.0 11.0 118 15.6 15.8 99 MARQUETTE 8760 14.2 8.9 160 16.9 15.8 107 SYLVAN LAKE 8420 13.3 20.3 66 22.1 26.6 83 SYLVAN ROAD 7120 .0 2.7 0 15.8 21.9 72 YOUNTS PEAK 8350 12.6 15.4 82 13.3 20.3 66 ----- ----- Basin wide percent of average 81 83 POWDER-TONGUE BEAR TRAP MEADOW 8200 4.8 .7 686 12.4 12.5 99 BIG GOOSE 7990 13.1 9.1 144 18.0 14.8 122 BONE SPRINGS DIV 9350 14.8 16.2 91 15.3 20.3 75 BURGESS JUNCTION 7880 14.4 10.2 141 16.5 17.0 97 CLOUD PEAK RESERVOIR 9860 19.4 14.8 131 19.5 19.4 101 DOME LAKE 8880 13.7 10.4 132 19.1 18.8 102 GRAVE SPRINGS 8550 11.8 7.9 149 16.8 14.7 114 HANSEN SAWMILL 8360 5.6 2.2 255 13.9 12.4 112 MIDDLE POWDER 7760 13.7 11.1 123 13.2 17.5 75 POWDER RIVER PASS 9480 8.8 8.1 109 15.2 17.6 86 SUCKER CREEK 8880 17.7 10.2 174 21.5 19.5 110 TIE CREEK 6870 -M 1.3 * 18.5 15.4 120 ----- ----- Basin wide percent of average 137 100 BELLE FOURCHE BLIND PARK 6890 2.3 .1 2300* 17.9 15.9 113 COLE CANYON 5910 3.6 .8 450 16.9 11.2 151 NORTH RAPID CREEK 6130 .2 .6 33* 16.8 12.7 132 ----- ----- Basin wide percent of average 407* 130 UPPER N. PLATTE RIVER COLUMBINE 9160 18.1 13.1 138 29.5 30.7 96 DIVIDE PEAK 8880 20.3 12.8 159 29.8 25.9 115 ELK RIVER 8700 14.4 7.6 189 26.3 24.5 107 JOE WRIGHT 10120 25.9 23.8 109 30.5 32.5 94 NORTH FRENCH CREEK 10130 43.5 33.2 131 43.7 32.0 137 OLD BATTLE 10000 43.1 35.5 121 45.9 42.2 109 SAGE CREEK BASIN 7850 2.1 7.4 28 16.2 15.0 108 SOUTH BRUSH CREEK 8440 11.9 6.5 183 25.3 21.9 116 TOWER 10500 43.6 51.5 85 43.2 47.7 91 WEBBER SPRINGS 9250 25.1 18.1 139 36.2 33.0 110 WILLOW CREEK PASS 9540 14.4 11.2 129 17.9 17.1 105 ----- ----- Basin wide percent of average 119 107 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 26.1 23.1 113 29.8 29.2 102 CASPER MTN. 7900 16.6 11.7 142 20.2 21.8 93 DEADMAN HILL 10220 -M 18.0 * -M 22.9 * DEER PARK 9700 22.2 17.2 129 27.5 28.8 95 LAPRELE CREEK 8375 6.8 3.6 189 18.6 18.2 102 RENO HILL 8400 18.3 9.7 189 25.6 22.5 114 ROACH 9700 22.8 13.4 170 29.0 24.4 119 SAND LAKE 10050 40.7 35.5 115 40.3 31.8 127 SOUTH PASS 9040 19.2 14.1 136 25.5 24.5 104 WINDY PEAK 7900 7.7 1.7 453 17.8 15.2 117 ----- ----- Basin wide percent of average 139 108 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 .6 0* 19.0 19.8 96 DIVIDE PEAK 8880 20.3 12.8 159 29.8 25.9 115 OLD BATTLE 10000 43.1 35.5 121 45.9 42.2 109 SANDSTONE RS 8150 4.9 3.8 129 22.0 23.4 94 WHISKEY PARK 8950 28.1 26.5 106 39.5 36.0 110 ----- ----- Basin wide percent of average 122 106 UPPER GREEN RIVER BIG SANDY OPENING 9080 8.1 9.0 90 12.4 17.2 72 BLIND BULL SUM 8650 20.2 24.9 81 16.8 26.6 63 EAST RIM DIVIDE 7930 .2 9.2 2 9.3 14.9 62 ELKHART PARK G.S. 9400 7.8 9.4 83 11.6 17.4 67 GROS VENTRE SUMMIT 8750 8.3 9.9 84 12.0 16.4 73 GUNSIGHT PASS 9820 11.5 -M * 15.0 -M * KENDALL R.S. 7740 .1 3.7 3 10.8 17.5 62 LOOMIS PARK 8240 3.1 9.7 32 13.1 21.2 62 NEW FORK LAKE 8340 .3 3.8 8 8.8 14.5 61 POCKET CREEK 9360 9.2 -M * 14.4 -M * SNIDER BASIN 8060 7.4 7.7 96 15.7 19.4 81 SPRING CREEK DIVIDE 9000 23.1 24.7 94 23.6 31.6 75 TRIPLE PEAK 8500 17.5 17.1 102 27.1 30.3 89 ----- ----- Basin wide percent of average 74 71 LOWER GREEN RIVER HAMS FORK 7840 .4 1.1 36* 13.8 15.9 87 HEWINTA 9519 8.7 4.5 193 17.7 19.0 93 HICKERSON PARK 9145 2.3 2.1 110 15.3 11.4 134 HOLE-IN-ROCK 9150 2.0 1.7 118 15.0 10.9 138 INDIAN CREEK 9425 21.2 23.7 89 22.4 31.0 72 KELLEY R.S. 8180 8.3 9.1 91 17.6 24.9 71 STEEL CREEK PARK 10200 21.1 18.1 117 22.0 21.6 102 ----- ----- Basin wide percent of average 106 92 UPPER BEAR RIVER BUG LAKE 7950 11.2 10.9 103 19.2 23.8 81 HAYDEN FORK 9212 6.9 7.3 95 23.8 26.8 89 KELLEY R.S. 8180 8.3 9.1 91 17.6 24.9 71 LILY LAKE 9156 11.3 6.3 179 20.0 22.6 88 MONTE CRISTO 8960 18.1 22.7 80 24.6 32.2 76 SALT RIVER SUMMIT 7760 5.1 4.9 104 15.8 22.8 69 TRIAL LAKE 9992 20.6 23.2 89 21.4 31.3 68 ----- ----- Basin wide percent of average 97 77 ----------------------------------------------------------------------------- -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.