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 MONDAY: MAY 12 , 2003 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 5.7 7.7 74 24.5 25.4 96 COTTONWOOD CREEK 7600 13.8 15.2 91 27.9 33.3 84 GRANITE CREEK 6770 .5 8.9 6 18.6 23.3 80 GRASSY LAKE 7265 29.0 28.0 104 39.1 42.4 92 GROS VENTRE SUMMIT 8775 9.2 10.6 87 13.8 16.2 85 LEWIS LAKE DIVIDE 7860 31.6 30.2 105 35.2 42.9 82 PHILLIPS BENCH 8200 21.5 25.2 85 27.2 34.3 79 SALT RIVER SUMMIT 7600 1.8 6.1 30 16.0 22.5 71 SNAKE RIVER STATION 6920 1.2 7.1 17 24.6 26.5 93 SPRING CREEK DIVIDE 9000 -M 25.5 * -M 31.2 * THUMB DIVIDE 7980 11.0 10.8 102 21.0 23.0 91 TOGWOTEE PASS 9580 26.0 27.5 95 27.7 30.3 91 TWO OCEAN PLATEAU 9360 37.8 30.9 122 30.6 33.6 91 WILLOW CREEK 8450 24.5 26.4 93 40.1 39.4 102 ----- ----- Basin wide percent of average 91 88 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 30.7 25.6 120 27.0 24.7 109 BLACK BEAR 8170 41.1 37.2 110 39.9 47.4 84 CANYON 8090 12.8 8.0 160 18.8 18.7 101 FISHER CREEK 9100 42.0 36.9 114 40.2 43.6 92 MADISON PLATEAU 7750 21.1 20.5 103 26.9 31.8 85 NORTHEAST ENTRANCE 7350 1.7 4.1 41 16.4 15.8 104 PARKER PEAK 9400 29.8 24.1 124 25.0 20.8 120 SYLVAN LAKE 8420 23.4 21.1 111 29.3 26.2 112 THUMB DIVIDE 7980 11.0 10.8 102 21.0 23.0 91 TWO OCEAN PLATEAU 9360 37.8 30.9 122 30.6 33.6 91 WHISKEY CREEK 6800 10.3 11.0 94 21.4 25.3 85 WHITE MILL 8700 31.4 25.1 125 28.4 32.6 87 WOLVERINE 7650 .9 4.1 22 15.0 16.3 92 ----- ----- Basin wide percent of average 113 94 WIND RIVER BURROUGHS CREEK 8750 16.7 11.1 150 21.8 20.5 106 COLD SPRINGS 9630 2.1 3.6 58 13.4 15.0 89 DEER PARK 9700 14.7 17.5 84 22.2 28.4 78 HOBBS PARK 10100 13.9 17.0 82 17.1 18.4 93 LITTLE WARM 9370 5.3 8.5 62 14.4 17.9 80 SOUTH PASS 9040 9.5 14.9 64 17.8 23.9 74 ST. LAWRENCE ALT 8620 1.7 4.2 40 11.7 13.2 89 TOGWOTEE PASS 9580 26.0 27.5 95 27.7 30.3 91 TOWNSEND CREEK 8700 4.0 6.4 62 15.7 16.7 94 ----- ----- Basin wide percent of average 85 88 BIGHORN BASIN BALD MTN. 9380 21.4 23.1 93 21.2 22.7 93 BEAR TRAP MEADOW 8200 1.9 1.1 173 12.3 12.1 102 BLACKWATER 9780 31.0 28.8 108 27.2 26.2 104 BONE SPRINGS DIV 9350 19.1 16.6 115 20.8 19.7 106 EVENING STAR 9200 34.1 32.7 104 37.8 31.5 120 GRAVE SPRINGS 8550 6.5 8.6 76 12.4 14.2 87 KIRWIN 9550 15.0 11.4 132 16.8 15.4 109 MARQUETTE 8760 -M 9.4 * -M 15.2 * MIDDLE POWDER 7760 9.5 11.8 81 11.6 17.0 68 OWL CREEK 8975 1.4 2.7 52 9.0 9.2 98 POWDER RIVER PASS 9480 10.0 8.7 115 16.6 17.1 97 SHELL CREEK 9580 16.9 16.4 103 17.4 18.1 96 SYLVAN LAKE 8420 23.4 21.1 111 29.3 26.2 112 SYLVAN ROAD 7120 7.9 3.9 203 21.1 21.5 98 TIMBER CREEK 7950 4.8 2.8 171 12.4 11.9 104 YOUNTS PEAK 8350 16.4 16.0 102 18.9 20.0 94 ----- ----- Basin wide percent of average 107 101 SHOSHONE RIVER BLACKWATER 9780 31.0 28.8 108 27.2 26.2 104 EVENING STAR 9200 34.1 32.7 104 37.8 31.5 120 KIRWIN 9550 15.0 11.4 132 16.8 15.4 109 MARQUETTE 8760 -M 9.4 * -M 15.2 * SYLVAN LAKE 8420 23.4 21.1 111 29.3 26.2 112 SYLVAN ROAD 7120 7.9 3.9 203 21.1 21.5 98 YOUNTS PEAK 8350 16.4 16.0 102 18.9 20.0 94 ----- ----- Basin wide percent of average 112 107 POWDER-TONGUE BEAR TRAP MEADOW 8200 1.9 1.1 173 12.3 12.1 102 BIG GOOSE 7990 12.0 9.6 125 18.1 14.1 128 BONE SPRINGS DIV 9350 19.1 16.6 115 20.8 19.7 106 BURGESS JUNCTION 7880 14.2 10.9 130 18.4 16.5 112 CLOUD PEAK RESERVOIR 9860 18.1 15.1 120 19.3 18.7 103 DOME LAKE 8880 12.6 11.1 114 20.2 18.1 112 GRAVE SPRINGS 8550 6.5 8.6 76 12.4 14.2 87 HANSEN SAWMILL 8360 3.5 2.8 125 14.4 12.1 119 MIDDLE POWDER 7760 9.5 11.8 81 11.6 17.0 68 POWDER RIVER PASS 9480 10.0 8.7 115 16.6 17.1 97 SUCKER CREEK 8880 15.6 10.8 144 21.6 18.9 114 TIE CREEK 6870 4.1 1.9 216 19.0 14.8 128 ----- ----- Basin wide percent of average 117 106 BELLE FOURCHE BLIND PARK 6890 .0 .9 0 14.2 15.5 92 COLE CANYON 5910 .0 -M * 11.8 -M * NORTH RAPID CREEK 6130 .0 1.3 0 12.7 12.3 103 ----- ----- Basin wide percent of average 0 97 UPPER N. PLATTE RIVER COLUMBINE 9400 18.1 14.8 122 30.9 30.3 102 DIVIDE PEAK 8800 19.6 14.2 138 27.3 25.4 107 ELK RIVER 8700 13.0 9.2 141 25.2 24.1 105 JOE WRIGHT 10120 33.4 24.1 139 38.9 31.8 122 NORTH FRENCH CREEK 10100 38.6 33.5 115 38.0 31.3 121 OLD BATTLE 10000 -M 35.8 * -M 41.4 * SAGE CREEK BASIN 7850 .0 8.2 0 16.1 14.7 110 SOUTH BRUSH CREEK 8400 10.8 7.5 144 23.7 21.3 111 TOWER 10500 54.4 51.6 105 54.3 46.8 116 WEBBER SPRINGS 9200 17.6 19.6 90 31.1 32.4 96 WILLOW CREEK PASS 9540 22.9 11.8 194 21.4 16.8 127 ----- ----- Basin wide percent of average 117 112 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 20.5 24.2 85 27.3 28.5 96 CASPER MTN. 7900 11.8 12.9 91 16.6 21.1 79 DEADMAN HILL 10220 21.6 18.4 117 26.1 22.3 117 DEER PARK 9700 14.7 17.5 84 22.2 28.4 78 LAPRELE CREEK 8320 4.7 4.3 109 16.2 17.8 91 RENO HILL 8400 14.4 10.8 133 20.5 21.8 94 ROACH 9700 18.3 14.5 126 25.4 23.8 107 SAND LAKE 10080 34.8 35.8 97 30.9 31.1 99 SOUTH PASS 9040 9.5 14.9 64 17.8 23.9 74 WINDY PEAK 7840 5.8 2.4 242 16.4 14.8 111 ----- ----- Basin wide percent of average 100 94 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .1 1.5 7 20.1 19.4 104 DIVIDE PEAK 8800 19.6 14.2 138 27.3 25.4 107 OLD BATTLE 10000 -M 35.8 * -M 41.4 * SANDSTONE RS 8150 4.2 5.0 84 24.1 22.9 105 WHISKEY PARK 8950 31.7 27.4 116 35.0 35.2 99 ----- ----- Basin wide percent of average 116 103 UPPER GREEN RIVER BIG SANDY OPENING 9100 8.9 10.0 89 14.6 16.9 86 BLIND BULL SUM 8650 23.1 25.5 91 19.8 26.2 76 EAST RIM DIVIDE 7930 6.4 10.0 64 11.7 14.7 80 ELKHART PARK G.S. 9400 -M 10.1 * -M 17.1 * GROS VENTRE SUMMIT 8775 9.2 10.6 87 13.8 16.2 85 KENDALL R.S. 7740 .0 5.0 0 14.8 17.3 86 LOOMIS PARK 8240 7.2 10.7 67 18.7 20.8 90 NEW FORK LAKE 8340 3.3 4.8 69 -M 14.3 * SNIDER BASIN 8250 4.3 8.8 49 14.9 19.2 78 SPRING CREEK DIVIDE 9000 -M 25.5 * -M 31.2 * TRIPLE PEAK 8500 15.8 18.5 85 30.1 29.8 101 ----- ----- Basin wide percent of average 75 86 LOWER GREEN RIVER HAMS FORK 7840 .7 2.1 33 14.0 15.5 90 HEWINTA 9500 5.1 5.5 93 15.8 18.7 84 HICKERSON PARK 9150 2.1 2.9 72 12.5 11.1 113 HOLE-IN-ROCK 9150 2.4 2.3 104 13.4 10.6 126 INDIAN CREEK 9425 23.0 24.7 93 23.4 30.6 76 KELLEY R.S. 8180 8.0 10.2 78 16.9 24.5 69 STEEL CREEK PARK 10100 18.5 18.2 102 18.5 21.3 87 ----- ----- Basin wide percent of average 91 87 UPPER BEAR RIVER BUG LAKE 7950 11.5 12.4 93 20.2 23.4 86 HAYDEN FORK 9400 4.8 8.5 56 22.4 26.3 85 KELLEY R.S. 8180 8.0 10.2 78 16.9 24.5 69 LILY LAKE 9050 3.6 7.3 49 19.0 22.2 86 MONTE CRISTO 8960 11.8 23.9 49 26.4 31.6 84 SALT RIVER SUMMIT 7600 1.8 6.1 30 16.0 22.5 71 TRIAL LAKE 9960 14.6 23.9 61 22.2 30.8 72 ----- ----- Basin wide percent of average 61 79 ----------------------------------------------------------------------------- -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.