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 20 , 2003 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 -M 4.6 * -M 26.1 * COTTONWOOD CREEK 7600 6.4 11.3 57 27.9 34.3 81 GRANITE CREEK 6770 .0 5.7 0 19.3 23.9 81 GRASSY LAKE 7265 -M 22.8 * -M 43.5 * GROS VENTRE SUMMIT 8775 4.8 8.1 59 14.1 16.8 84 LEWIS LAKE DIVIDE 7860 -M 25.7 * -M 43.9 * PHILLIPS BENCH 8200 -M 21.1 * -M 35.2 * SALT RIVER SUMMIT 7600 .0 3.5 0 16.1 23.1 70 SNAKE RIVER STATION 6920 -M 4.0 * -M 27.3 * SPRING CREEK DIVIDE 9000 21.0 21.8 96 26.6 32.0 83 THUMB DIVIDE 7980 4.2 7.4 57 21.4 23.7 90 TOGWOTEE PASS 9580 -M 25.8 * -M 31.3 * TWO OCEAN PLATEAU 9360 36.7 29.1 126 31.6 34.7 91 WILLOW CREEK 8450 -M 22.1 * -M 40.7 * ----- ----- Basin wide percent of average 84 83 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 27.2 23.9 114 27.2 25.6 106 BLACK BEAR 8170 -M 33.4 * -M 48.6 * CANYON 8090 -M 5.4 * -M 19.4 * FISHER CREEK 9100 41.0 34.7 118 41.6 44.8 93 MADISON PLATEAU 7750 17.1 16.4 104 27.6 32.8 84 NORTHEAST ENTRANCE 7350 -M 2.4 * -M 16.5 * PARKER PEAK 9400 26.0 22.4 116 25.1 21.8 115 SYLVAN LAKE 8420 -M 17.7 * -M 27.3 * THUMB DIVIDE 7980 4.2 7.4 57 21.4 23.7 90 TWO OCEAN PLATEAU 9360 36.7 29.1 126 31.6 34.7 91 WHISKEY CREEK 6800 -M 7.3 * -M 26.1 * WHITE MILL 8700 31.1 22.7 137 29.0 33.7 86 WOLVERINE 7650 .0 2.3 0 14.7 17.1 86 ----- ----- Basin wide percent of average 115 93 WIND RIVER BURROUGHS CREEK 8750 -M 8.3 * -M 21.3 * COLD SPRINGS 9630 .2 2.7 7 13.6 15.9 86 DEER PARK 9700 11.9 14.5 82 22.3 29.4 76 HOBBS PARK 10100 12.1 14.8 82 17.3 19.4 89 LITTLE WARM 9370 -M 6.1 * -M 18.8 * SOUTH PASS 9040 4.1 11.8 35 17.8 24.7 72 ST. LAWRENCE ALT 8620 .0 2.8 0 11.8 14.0 84 TOGWOTEE PASS 9580 -M 25.8 * -M 31.3 * TOWNSEND CREEK 8700 .0 4.5 0 15.9 17.5 91 ----- ----- Basin wide percent of average 55 82 BIGHORN BASIN BALD MTN. 9380 20.8 21.1 99 21.4 23.8 90 BEAR TRAP MEADOW 8200 .1 .5 20* 12.2 12.9 95 BLACKWATER 9780 30.0 27.6 109 27.6 27.3 101 BONE SPRINGS DIV 9350 17.3 13.8 125 21.3 20.8 102 EVENING STAR 9200 32.6 30.8 106 38.6 32.7 118 GRAVE SPRINGS 8550 1.5 6.1 25 12.1 14.9 81 KIRWIN 9550 12.1 9.4 129 16.9 16.2 104 MARQUETTE 8760 -M 7.5 * -M 16.3 * MIDDLE POWDER 7760 5.5 8.6 64 11.8 17.8 66 OWL CREEK 8975 .2 1.8 11 8.9 10.0 89 POWDER RIVER PASS 9480 7.4 6.4 116 16.7 18.1 92 SHELL CREEK 9580 16.7 14.6 114 18.0 19.1 94 SYLVAN LAKE 8420 -M 17.7 * -M 27.3 * SYLVAN ROAD 7120 -M 1.9 * -M 22.2 * TIMBER CREEK 7950 .9 1.7 53 12.5 12.9 97 YOUNTS PEAK 8350 14.3 12.9 111 19.4 20.8 93 ----- ----- Basin wide percent of average 103 96 SHOSHONE RIVER BLACKWATER 9780 30.0 27.6 109 27.6 27.3 101 EVENING STAR 9200 32.6 30.8 106 38.6 32.7 118 KIRWIN 9550 12.1 9.4 129 16.9 16.2 104 MARQUETTE 8760 -M 7.5 * -M 16.3 * SYLVAN LAKE 8420 -M 17.7 * -M 27.3 * SYLVAN ROAD 7120 -M 1.9 * -M 22.2 * YOUNTS PEAK 8350 14.3 12.9 111 19.4 20.8 93 ----- ----- Basin wide percent of average 110 106 POWDER-TONGUE BEAR TRAP MEADOW 8200 .1 .5 20* 12.2 12.9 95 BIG GOOSE 7990 8.9 7.2 124 18.2 15.0 121 BONE SPRINGS DIV 9350 17.3 13.8 125 21.3 20.8 102 BURGESS JUNCTION 7880 11.5 8.0 144 18.7 17.3 108 CLOUD PEAK RESERVOIR 9860 16.8 12.7 132 19.3 19.9 97 DOME LAKE 8880 8.8 8.3 106 20.7 19.1 108 GRAVE SPRINGS 8550 1.5 6.1 25 12.1 14.9 81 HANSEN SAWMILL 8360 .3 1.6 19 14.5 12.9 112 MIDDLE POWDER 7760 5.5 8.6 64 11.8 17.8 66 POWDER RIVER PASS 9480 7.4 6.4 116 16.7 18.1 92 SUCKER CREEK 8880 12.7 8.3 153 22.1 19.9 111 TIE CREEK 6870 .1 .9 11 19.3 15.8 122 ----- ----- Basin wide percent of average 110 101 BELLE FOURCHE BLIND PARK 6890 .0 .1 0* 14.6 16.5 88 COLE CANYON 5910 .0 -M * 12.2 -M * NORTH RAPID CREEK 6130 .0 .4 0* 12.9 13.0 99 ----- ----- Basin wide percent of average 0* 93 UPPER N. PLATTE RIVER COLUMBINE 9400 7.5 9.8 77 31.3 31.0 101 DIVIDE PEAK 8800 10.5 10.1 104 27.4 26.3 104 ELK RIVER 8700 1.1 5.7 19 25.3 24.8 102 JOE WRIGHT 10120 30.7 21.8 141 38.9 33.0 118 NORTH FRENCH CREEK 10100 36.6 30.5 120 38.6 32.5 119 OLD BATTLE 10000 -M 32.6 * -M 42.5 * SAGE CREEK BASIN 7850 .0 5.8 0 16.6 15.2 109 SOUTH BRUSH CREEK 8400 4.4 5.1 86 23.8 22.2 107 TOWER 10500 50.4 48.9 103 55.1 48.1 115 WEBBER SPRINGS 9200 10.7 14.7 73 31.4 33.3 94 WILLOW CREEK PASS 9540 18.8 8.8 214 21.7 17.6 123 ----- ----- Basin wide percent of average 106 109 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 16.4 19.7 83 27.6 29.5 94 CASPER MTN. 7900 4.9 9.5 52 16.7 22.3 75 DEADMAN HILL 10220 19.0 16.0 119 26.2 23.3 112 DEER PARK 9700 11.9 14.5 82 22.3 29.4 76 LAPRELE CREEK 8320 .0 2.8 0 16.3 18.7 87 RENO HILL 8400 9.0 7.8 115 20.7 23.0 90 ROACH 9700 13.8 11.2 123 25.5 24.9 102 SAND LAKE 10080 33.0 32.6 101 33.0 32.4 102 SOUTH PASS 9040 4.1 11.8 35 17.8 24.7 72 WINDY PEAK 7840 .2 1.2 17 16.5 15.7 105 ----- ----- Basin wide percent of average 88 91 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 .4 0* 20.1 20.0 101 DIVIDE PEAK 8800 10.5 10.1 104 27.4 26.3 104 OLD BATTLE 10000 -M 32.6 * -M 42.5 * SANDSTONE RS 8150 .3 2.7 11 24.5 23.7 103 WHISKEY PARK 8950 26.0 22.7 115 35.2 36.3 97 ----- ----- Basin wide percent of average 103 101 UPPER GREEN RIVER BIG SANDY OPENING 9100 3.0 6.8 44 14.6 17.6 83 BLIND BULL SUM 8650 -M 22.8 * -M 27.0 * EAST RIM DIVIDE 7930 2.2 6.9 32 11.9 15.2 78 ELKHART PARK G.S. 9400 -M 7.6 * -M 17.8 * GROS VENTRE SUMMIT 8775 4.8 8.1 59 14.1 16.8 84 KENDALL R.S. 7740 .0 2.6 0 15.0 17.8 84 LOOMIS PARK 8240 -M 7.5 * -M 21.5 * NEW FORK LAKE 8340 .0 2.7 0 -M 14.9 * SNIDER BASIN 8250 .0 5.4 0 15.1 19.7 77 SPRING CREEK DIVIDE 9000 21.0 21.8 96 26.6 32.0 83 TRIPLE PEAK 8500 -M 13.5 * -M 30.6 * ----- ----- Basin wide percent of average 57 82 LOWER GREEN RIVER HAMS FORK 7840 .0 .8 0* 14.1 16.1 88 HEWINTA 9500 .0 3.4 0 16.1 19.3 83 HICKERSON PARK 9150 .0 1.5 0 12.5 11.7 107 HOLE-IN-ROCK 9150 .0 1.2 0 13.4 11.2 120 INDIAN CREEK 9425 19.0 21.1 90 23.6 31.3 75 KELLEY R.S. 8180 .9 6.8 13 16.3 25.2 65 STEEL CREEK PARK 10100 16.3 16.2 101 18.7 22.0 85 ----- ----- Basin wide percent of average 71 84 UPPER BEAR RIVER BUG LAKE 7950 3.3 8.5 39 20.4 24.1 85 HAYDEN FORK 9400 .6 5.6 11 22.2 27.2 82 KELLEY R.S. 8180 .9 6.8 13 16.3 25.2 65 LILY LAKE 9050 .0 4.9 0 18.7 22.9 82 MONTE CRISTO 8960 5.0 19.7 25 26.7 32.6 82 SALT RIVER SUMMIT 7600 .0 3.5 0 16.1 23.1 70 TRIAL LAKE 9960 10.2 20.6 50 22.9 31.8 72 ----- ----- Basin wide percent of average 29 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.