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: MAY 19 , 2010 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 .0 5.2 0 16.0 25.9 62 COTTONWOOD CREEK 7670 12.6 12.5 101 28.0 34.2 82 GRAND TARGHEE 9260 43.9 -M * 35.4 -M * GRANITE CREEK 6770 .0 6.7 0 16.0 23.8 67 GRASSY LAKE 7265 14.9 24.7 60 31.4 43.3 73 GROS VENTRE SUMMIT 8750 5.7 8.9 64 12.3 16.6 74 GUNSIGHT PASS 9820 10.6 -M * 15.0 -M * LEWIS LAKE DIVIDE 7850 15.2 27.3 56 26.4 43.8 60 PHILLIPS BENCH 8200 13.9 22.5 62 25.0 35.1 71 SALT RIVER SUMMIT 7760 2.4 3.4 71 16.3 23.1 71 SNAKE RIVER STATION 6920 .0 4.2 0 19.7 27.2 72 SPRING CREEK DIVIDE 9000 21.5 23.3 92 23.6 31.9 74 THUMB DIVIDE 7980 .5 8.4 6 16.7 23.7 70 TOGWOTEE PASS 9580 22.7 26.8 85 -M 31.2 * TWO OCEAN PLATEAU 9240 24.7 30.1 82 22.3 34.5 65 WILLOW CREEK 8380 19.4 23.6 82 35.6 40.6 88 ----- ----- Basin wide percent of average 67 72 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 16.7 25.1 67 18.1 25.5 71 BLACK BEAR 8170 23.3 35.3 66 31.7 48.4 65 CANYON 7870 3.5 5.9 59 14.4 19.3 75 FISHER CREEK 9100 24.7 35.7 69 29.7 44.6 67 MADISON PLATEAU 7750 13.5 18.0 75 25.4 32.5 78 NORTHEAST ENTRANCE 7350 .0 2.2 0 12.0 16.3 74 PARKER PEAK 9400 18.8 23.6 80 17.1 21.6 79 SYLVAN LAKE 8420 11.5 19.3 60 22.7 27.0 84 THUMB DIVIDE 7980 .5 8.4 6 16.7 23.7 70 TWO OCEAN PLATEAU 9240 24.7 30.1 82 22.3 34.5 65 WHISKEY CREEK 6800 5.6 8.2 68 16.2 25.9 63 WHITE MILL 8700 17.3 23.9 72 20.6 33.5 61 WOLVERINE 7650 .0 2.0 0 9.6 17.0 56 ----- ----- Basin wide percent of average 67 69 WIND RIVER BURROUGHS CREEK 8750 10.0 9.6 104 13.2 21.2 62 COLD SPRINGS 9630 7.7 2.8 275 17.7 15.8 112 DEER PARK 9700 21.6 17.1 126 27.5 29.3 94 HOBBS PARK 10100 24.6 16.2 152 26.6 19.3 138 LITTLE WARM 9370 9.1 6.8 134 14.5 18.7 78 SOUTH PASS 9040 18.4 12.6 146 25.6 24.8 103 ST. LAWRENCE ALT 8620 7.7 2.9 266 19.1 14.0 136 TOGWOTEE PASS 9580 22.7 26.8 85 -M 31.2 * TOWNSEND CREEK 8700 14.8 5.0 296 24.1 17.5 138 ----- ----- Basin wide percent of average 137 105 BIGHORN BASIN BALD MTN. 9380 17.8 22.5 79 16.0 23.8 67 BEAR TRAP MEADOW 8200 3.1 .4 775* 12.5 12.8 98 BLACKWATER 9780 22.1 28.8 77 22.0 27.0 81 BONE SPRINGS DIV 9350 13.8 15.5 89 15.4 20.6 75 EVENING STAR 9200 18.8 31.8 59 26.4 32.4 81 GRAVE SPRINGS 8550 10.6 6.2 171 16.9 14.9 113 KIRWIN 9550 11.9 10.4 114 15.7 16.1 98 MARQUETTE 8760 13.3 8.3 160 16.8 16.2 104 MIDDLE POWDER 7760 11.9 9.6 124 13.2 17.8 74 OWL CREEK 8975 1.5 1.9 79 11.2 9.8 114 POWDER RIVER PASS 9480 7.7 7.1 108 15.3 18.0 85 SHELL CREEK 9580 14.7 15.8 93 16.0 19.0 84 SYLVAN LAKE 8420 11.5 19.3 60 22.7 27.0 84 SYLVAN ROAD 7120 .0 2.0 0 16.2 22.1 73 TIMBER CREEK 7950 3.6 1.9 189 13.3 12.8 104 YOUNTS PEAK 8350 10.6 14.3 74 13.3 20.6 65 ----- ----- Basin wide percent of average 88 85 SHOSHONE RIVER BLACKWATER 9780 22.1 28.8 77 22.0 27.0 81 EVENING STAR 9200 18.8 31.8 59 26.4 32.4 81 KIRWIN 9550 11.9 10.4 114 15.7 16.1 98 MARQUETTE 8760 13.3 8.3 160 16.8 16.2 104 SYLVAN LAKE 8420 11.5 19.3 60 22.7 27.0 84 SYLVAN ROAD 7120 .0 2.0 0 16.2 22.1 73 YOUNTS PEAK 8350 10.6 14.3 74 13.3 20.6 65 ----- ----- Basin wide percent of average 77 82 POWDER-TONGUE BEAR TRAP MEADOW 8200 3.1 .4 775* 12.5 12.8 98 BIG GOOSE 7990 12.2 8.4 145 18.2 15.1 121 BONE SPRINGS DIV 9350 13.8 15.5 89 15.4 20.6 75 BURGESS JUNCTION 7880 13.2 8.9 148 16.6 17.3 96 CLOUD PEAK RESERVOIR 9860 18.4 14.2 130 19.7 19.8 99 DOME LAKE 8880 13.0 9.3 140 19.2 19.1 101 GRAVE SPRINGS 8550 10.6 6.2 171 16.9 14.9 113 HANSEN SAWMILL 8360 3.9 1.7 229 14.0 12.7 110 MIDDLE POWDER 7760 11.9 9.6 124 13.2 17.8 74 POWDER RIVER PASS 9480 7.7 7.1 108 15.3 18.0 85 SUCKER CREEK 8880 16.8 9.1 185 21.6 19.9 109 TIE CREEK 6870 5.1 1.0 510 18.6 15.7 118 ----- ----- Basin wide percent of average 142 99 BELLE FOURCHE BLIND PARK 6890 .0 .0 100* 18.4 16.3 113 COLE CANYON 5910 .8 .4 200* 17.7 11.5 154 NORTH RAPID CREEK 6130 .0 .3 0* 17.1 12.9 133 ----- ----- Basin wide percent of average 114* 131 UPPER N. PLATTE RIVER COLUMBINE 9160 15.2 10.9 139 29.6 31.0 95 DIVIDE PEAK 8880 16.7 11.0 152 29.9 26.2 114 ELK RIVER 8700 11.1 6.0 185 26.4 24.8 106 JOE WRIGHT 10120 25.3 23.1 110 30.7 32.9 93 NORTH FRENCH CREEK 10130 -M 32.2 * -M 32.5 * OLD BATTLE 10000 42.7 34.3 124 46.1 42.6 108 SAGE CREEK BASIN 7850 .1 6.4 2 16.2 15.2 107 SOUTH BRUSH CREEK 8440 8.9 5.5 162 25.4 22.3 114 TOWER 10500 43.2 50.7 85 43.4 48.2 90 WEBBER SPRINGS 9250 23.9 16.0 149 36.3 33.3 109 WILLOW CREEK PASS 9540 13.9 9.9 140 18.0 17.4 103 ----- ----- Basin wide percent of average 116 103 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 25.1 21.3 118 30.0 29.6 101 CASPER MTN. 7900 13.9 10.2 136 20.5 22.3 92 DEADMAN HILL 10220 -M 17.2 * -M 23.2 * DEER PARK 9700 21.6 17.1 126 27.5 29.3 94 LAPRELE CREEK 8375 4.5 2.9 155 19.0 18.6 102 RENO HILL 8400 17.3 8.4 206 26.3 23.0 114 ROACH 9700 22.3 12.0 186 29.4 24.8 119 SAND LAKE 10050 40.7 34.5 118 40.5 32.3 125 SOUTH PASS 9040 18.4 12.6 146 25.6 24.8 103 WINDY PEAK 7900 5.1 1.2 425 18.2 15.6 117 ----- ----- Basin wide percent of average 141 108 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 .0 100* 19.0 20.0 95 DIVIDE PEAK 8880 16.7 11.0 152 29.9 26.2 114 OLD BATTLE 10000 42.7 34.3 124 46.1 42.6 108 SANDSTONE RS 8150 .0 2.8 0 22.0 23.6 93 WHISKEY PARK 8950 26.2 24.8 106 39.6 36.4 109 ----- ----- Basin wide percent of average 117 105 UPPER GREEN RIVER BIG SANDY OPENING 9080 5.4 7.8 69 12.7 17.5 73 BLIND BULL SUM 8650 18.5 24.0 77 16.9 26.9 63 EAST RIM DIVIDE 7930 .2 8.0 3 9.4 15.1 62 ELKHART PARK G.S. 9400 6.1 8.5 72 11.8 17.7 67 GROS VENTRE SUMMIT 8750 5.7 8.9 64 12.3 16.6 74 GUNSIGHT PASS 9820 10.6 -M * 15.0 -M * KENDALL R.S. 7740 .2 2.1 10 11.3 17.7 64 LOOMIS PARK 8240 .7 8.5 8 13.2 21.4 62 NEW FORK LAKE 8340 .0 2.7 0 9.2 14.8 62 POCKET CREEK 9360 8.2 -M * 14.5 -M * SNIDER BASIN 8060 5.2 6.3 83 15.8 19.6 81 SPRING CREEK DIVIDE 9000 21.5 23.3 92 23.6 31.9 74 TRIPLE PEAK 8500 15.4 15.2 101 27.2 30.6 89 ----- ----- Basin wide percent of average 68 71 LOWER GREEN RIVER HAMS FORK 7840 .4 .0 * 14.1 16.1 88 HEWINTA 9519 6.2 3.5 177 17.8 19.3 92 HICKERSON PARK 9145 .5 1.4 36 15.4 11.6 133 HOLE-IN-ROCK 9150 .4 1.2 33 15.1 11.2 135 INDIAN CREEK 9425 19.3 22.4 86 22.6 31.3 72 KELLEY R.S. 8180 5.9 7.8 76 17.7 25.1 71 STEEL CREEK PARK 10200 21.0 17.4 121 22.3 21.9 102 ----- ----- Basin wide percent of average 100 92 UPPER BEAR RIVER BUG LAKE 7950 9.2 9.2 100 19.4 24.0 81 HAYDEN FORK 9212 4.0 6.1 66 24.1 27.1 89 KELLEY R.S. 8180 5.9 7.8 76 17.7 25.1 71 LILY LAKE 9156 9.9 5.3 187 20.3 22.8 89 MONTE CRISTO 8960 16.8 21.1 80 25.1 32.6 77 SALT RIVER SUMMIT 7760 2.4 3.4 71 16.3 23.1 71 TRIAL LAKE 9992 19.5 21.9 89 21.9 31.7 69 ----- ----- Basin wide percent of average 91 78 ----------------------------------------------------------------------------- -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.