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: MAY 13 , 2010 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 2.7 7.9 34 16.0 25.3 63 COTTONWOOD CREEK 7670 16.0 15.3 105 27.5 33.5 82 GRAND TARGHEE 9260 44.8 -M * 34.9 -M * GRANITE CREEK 6770 2.6 9.0 29 15.0 23.3 64 GRASSY LAKE 7265 19.7 28.3 70 31.0 42.4 73 GROS VENTRE SUMMIT 8750 9.1 10.8 84 11.7 16.1 73 GUNSIGHT PASS 9820 11.8 -M * 14.7 -M * LEWIS LAKE DIVIDE 7850 18.5 30.5 61 26.1 43.1 61 PHILLIPS BENCH 8200 18.1 25.5 71 24.8 34.4 72 SALT RIVER SUMMIT 7760 6.8 6.2 110 15.7 22.6 69 SNAKE RIVER STATION 6920 .0 7.2 0 19.4 26.6 73 SPRING CREEK DIVIDE 9000 23.3 25.9 90 23.3 31.3 74 THUMB DIVIDE 7980 6.7 10.9 61 16.6 23.1 72 TOGWOTEE PASS 9580 23.8 27.8 86 -M 30.4 * TWO OCEAN PLATEAU 9240 26.8 31.1 86 22.2 33.7 66 WILLOW CREEK 8380 22.4 26.8 84 34.6 39.7 87 ----- ----- Basin wide percent of average 75 72 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 17.9 25.7 70 17.7 24.9 71 BLACK BEAR 8170 28.1 37.5 75 31.7 47.6 67 CANYON 7870 7.5 8.0 94 14.1 18.7 75 FISHER CREEK 9100 27.4 37.3 73 29.5 43.7 68 MADISON PLATEAU 7750 17.0 20.9 81 25.0 31.7 79 NORTHEAST ENTRANCE 7350 .6 4.4 14 11.5 15.8 73 PARKER PEAK 9400 22.4 24.2 93 16.7 20.9 80 SYLVAN LAKE 8420 14.3 21.3 67 22.1 26.2 84 THUMB DIVIDE 7980 6.7 10.9 61 16.6 23.1 72 TWO OCEAN PLATEAU 9240 26.8 31.1 86 22.2 33.7 66 WHISKEY CREEK 6800 9.3 11.3 82 16.3 25.3 64 WHITE MILL 8700 19.8 25.5 78 20.4 32.7 62 WOLVERINE 7650 .0 4.2 0 9.6 16.4 59 ----- ----- Basin wide percent of average 75 70 WIND RIVER BURROUGHS CREEK 8750 11.7 11.1 105 12.8 20.5 62 COLD SPRINGS 9630 9.4 4.0 235 17.6 15.2 116 DEER PARK 9700 22.5 17.0 132 27.4 28.4 96 HOBBS PARK 10100 25.5 17.3 147 26.0 18.5 141 LITTLE WARM 9370 10.2 8.5 120 14.1 18.1 78 SOUTH PASS 9040 19.4 15.1 128 25.4 24.2 105 ST. LAWRENCE ALT 8620 9.9 4.5 220 19.2 13.4 143 TOGWOTEE PASS 9580 23.8 27.8 86 -M 30.4 * TOWNSEND CREEK 8700 16.3 6.5 251 23.7 16.9 140 ----- ----- Basin wide percent of average 133 107 BIGHORN BASIN BALD MTN. 9380 19.0 23.5 81 15.7 23.0 68 BEAR TRAP MEADOW 8200 5.4 1.1 491 12.4 12.1 102 BLACKWATER 9780 22.9 28.8 80 21.5 26.2 82 BONE SPRINGS DIV 9350 15.6 16.9 92 14.8 19.9 74 EVENING STAR 9200 22.0 32.9 67 26.2 31.5 83 GRAVE SPRINGS 8550 12.2 9.2 133 16.7 14.4 116 KIRWIN 9550 13.5 11.9 113 15.6 15.5 101 MARQUETTE 8760 13.9 9.6 145 16.7 15.3 109 MIDDLE POWDER 7760 13.9 11.9 117 13.0 17.2 76 OWL CREEK 8975 3.9 2.8 139 11.2 9.2 122 POWDER RIVER PASS 9480 9.4 8.8 107 15.1 17.3 87 SHELL CREEK 9580 16.5 16.7 99 16.1 18.3 88 SYLVAN LAKE 8420 14.3 21.3 67 22.1 26.2 84 SYLVAN ROAD 7120 .0 3.7 0 15.9 21.6 74 TIMBER CREEK 7950 5.7 2.8 204 13.3 12.0 111 YOUNTS PEAK 8350 13.0 16.5 79 13.3 20.0 67 ----- ----- Basin wide percent of average 92 87 SHOSHONE RIVER BLACKWATER 9780 22.9 28.8 80 21.5 26.2 82 EVENING STAR 9200 22.0 32.9 67 26.2 31.5 83 KIRWIN 9550 13.5 11.9 113 15.6 15.5 101 MARQUETTE 8760 13.9 9.6 145 16.7 15.3 109 SYLVAN LAKE 8420 14.3 21.3 67 22.1 26.2 84 SYLVAN ROAD 7120 .0 3.7 0 15.9 21.6 74 YOUNTS PEAK 8350 13.0 16.5 79 13.3 20.0 67 ----- ----- Basin wide percent of average 80 84 POWDER-TONGUE BEAR TRAP MEADOW 8200 5.4 1.1 491 12.4 12.1 102 BIG GOOSE 7990 13.5 9.7 139 17.7 14.5 122 BONE SPRINGS DIV 9350 15.6 16.9 92 14.8 19.9 74 BURGESS JUNCTION 7880 14.9 11.1 134 16.5 16.7 99 CLOUD PEAK RESERVOIR 9860 19.7 15.4 128 19.3 18.9 102 DOME LAKE 8880 14.0 11.2 125 19.0 18.4 103 GRAVE SPRINGS 8550 12.2 9.2 133 16.7 14.4 116 HANSEN SAWMILL 8360 6.2 3.0 207 13.9 12.1 115 MIDDLE POWDER 7760 13.9 11.9 117 13.0 17.2 76 POWDER RIVER PASS 9480 9.4 8.8 107 15.1 17.3 87 SUCKER CREEK 8880 18.1 11.0 165 21.4 19.1 112 TIE CREEK 6870 7.1 2.1 338 18.5 15.0 123 ----- ----- Basin wide percent of average 135 101 BELLE FOURCHE BLIND PARK 6890 2.8 .8 350* 17.7 15.6 113 COLE CANYON 5910 4.1 1.2 342 16.8 10.9 154 NORTH RAPID CREEK 6130 1.1 .9 122 16.6 12.5 133 ----- ----- Basin wide percent of average 276 131 UPPER N. PLATTE RIVER COLUMBINE 9160 18.4 15.1 122 28.8 30.4 95 DIVIDE PEAK 8880 21.2 14.5 146 29.6 25.6 116 ELK RIVER 8700 14.9 9.2 162 25.6 24.2 106 JOE WRIGHT 10120 24.8 24.4 102 29.4 32.0 92 NORTH FRENCH CREEK 10130 43.2 33.8 128 43.3 31.6 137 OLD BATTLE 10000 42.2 36.4 116 45.1 41.7 108 SAGE CREEK BASIN 7850 5.5 8.4 65 16.1 14.8 109 SOUTH BRUSH CREEK 8440 12.6 7.6 166 24.9 21.5 116 TOWER 10500 42.5 52.1 82 40.8 47.3 86 WEBBER SPRINGS 9250 24.4 20.0 122 35.2 32.6 108 WILLOW CREEK PASS 9540 13.6 12.3 111 16.8 16.8 100 ----- ----- Basin wide percent of average 113 105 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 26.0 24.8 105 29.4 28.7 102 CASPER MTN. 7900 16.9 13.2 128 19.9 21.3 93 DEADMAN HILL 10220 -M 18.7 * -M 22.5 * DEER PARK 9700 22.5 17.0 132 27.4 28.4 96 LAPRELE CREEK 8375 6.6 4.3 153 18.1 17.9 101 RENO HILL 8400 17.5 10.9 161 24.5 22.1 111 ROACH 9700 22.4 14.8 151 28.4 24.0 118 SAND LAKE 10050 39.7 36.2 110 39.5 31.3 126 SOUTH PASS 9040 19.4 15.1 128 25.4 24.2 105 WINDY PEAK 7900 7.6 2.3 330 17.3 14.8 117 ----- ----- Basin wide percent of average 129 108 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 1.5 0 19.0 19.6 97 DIVIDE PEAK 8880 21.2 14.5 146 29.6 25.6 116 OLD BATTLE 10000 42.2 36.4 116 45.1 41.7 108 SANDSTONE RS 8150 6.9 4.9 141 22.0 23.1 95 WHISKEY PARK 8950 28.2 27.9 101 38.8 35.6 109 ----- ----- Basin wide percent of average 116 106 UPPER GREEN RIVER BIG SANDY OPENING 9080 8.7 10.2 85 12.4 16.9 73 BLIND BULL SUM 8650 20.7 25.8 80 16.6 26.3 63 EAST RIM DIVIDE 7930 .2 10.3 2 9.1 14.7 62 ELKHART PARK G.S. 9400 7.8 10.3 76 11.5 17.1 67 GROS VENTRE SUMMIT 8750 9.1 10.8 84 11.7 16.1 73 GUNSIGHT PASS 9820 11.8 -M * 14.7 -M * KENDALL R.S. 7740 .1 5.2 2 10.6 17.3 61 LOOMIS PARK 8240 4.3 10.8 40 13.0 20.9 62 NEW FORK LAKE 8340 1.1 4.9 22 8.4 14.3 59 POCKET CREEK 9360 8.6 -M * 14.1 -M * SNIDER BASIN 8060 8.0 8.9 90 15.8 19.3 82 SPRING CREEK DIVIDE 9000 23.3 25.9 90 23.3 31.3 74 TRIPLE PEAK 8500 18.2 18.9 96 26.9 30.0 90 ----- ----- Basin wide percent of average 71 71 LOWER GREEN RIVER HAMS FORK 7840 1.7 2.2 77 13.8 15.7 88 HEWINTA 9519 8.5 5.5 155 17.3 18.8 92 HICKERSON PARK 9145 2.6 2.8 93 14.9 11.1 134 HOLE-IN-ROCK 9150 2.0 2.3 87 14.5 10.7 136 INDIAN CREEK 9425 21.7 25.0 87 22.2 30.7 72 KELLEY R.S. 8180 9.3 10.3 90 17.4 24.6 71 STEEL CREEK PARK 10200 20.5 18.6 110 21.5 21.4 100 ----- ----- Basin wide percent of average 99 91 UPPER BEAR RIVER BUG LAKE 7950 12.2 12.5 98 19.1 23.5 81 HAYDEN FORK 9212 7.0 8.6 81 23.4 26.4 89 KELLEY R.S. 8180 9.3 10.3 90 17.4 24.6 71 LILY LAKE 9156 11.3 7.4 153 19.7 22.3 88 MONTE CRISTO 8960 18.8 24.1 78 24.5 31.9 77 SALT RIVER SUMMIT 7760 6.8 6.2 110 15.7 22.6 69 TRIAL LAKE 9992 20.3 24.3 84 21.0 30.9 68 ----- ----- Basin wide percent of average 92 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.