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 SATURDAY: MAY 10 , 2003 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 6.9 8.6 80 24.5 25.2 97 COTTONWOOD CREEK 7600 14.2 16.0 89 27.8 33.0 84 GRANITE CREEK 6770 2.0 9.6 21 18.6 23.1 81 GRASSY LAKE 7265 30.0 29.0 103 38.9 42.1 92 GROS VENTRE SUMMIT 8775 9.4 11.1 85 13.7 16.0 86 LEWIS LAKE DIVIDE 7860 32.0 31.0 103 34.9 42.7 82 PHILLIPS BENCH 8200 -M 26.0 * -M 34.1 * SALT RIVER SUMMIT 7600 2.2 6.9 32 15.9 22.3 71 SNAKE RIVER STATION 6920 2.4 8.0 30 24.6 26.3 94 SPRING CREEK DIVIDE 9000 -M 26.1 * -M 31.0 * THUMB DIVIDE 7980 11.3 11.6 97 20.8 22.8 91 TOGWOTEE PASS 9580 25.8 27.6 93 27.4 30.1 91 TWO OCEAN PLATEAU 9360 37.6 31.1 121 30.6 33.3 92 WILLOW CREEK 8450 24.4 27.2 90 39.8 39.1 102 ----- ----- Basin wide percent of average 91 89 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 30.5 25.6 119 26.7 24.5 109 BLACK BEAR 8170 41.1 37.7 109 39.7 47.1 84 CANYON 8090 12.8 8.6 149 18.6 18.5 101 FISHER CREEK 9100 41.7 37.0 113 39.9 43.3 92 MADISON PLATEAU 7750 21.6 21.2 102 26.8 31.5 85 NORTHEAST ENTRANCE 7350 2.3 4.7 49 16.2 15.6 104 PARKER PEAK 9400 29.8 24.2 123 24.8 20.6 120 SYLVAN LAKE 8420 23.2 21.6 107 29.1 25.9 112 THUMB DIVIDE 7980 11.3 11.6 97 20.8 22.8 91 TWO OCEAN PLATEAU 9360 37.6 31.1 121 30.6 33.3 92 WHISKEY CREEK 6800 10.7 11.7 91 21.3 25.1 85 WHITE MILL 8700 31.1 25.3 123 28.0 32.4 86 WOLVERINE 7650 1.3 4.6 28 14.5 16.1 90 ----- ----- Basin wide percent of average 111 94 WIND RIVER BURROUGHS CREEK 8750 16.5 11.5 143 21.5 20.3 106 COLD SPRINGS 9630 1.7 3.8 45 13.0 14.8 88 DEER PARK 9700 13.9 17.7 79 21.4 28.1 76 HOBBS PARK 10100 13.5 17.2 78 16.6 18.1 92 LITTLE WARM 9370 5.2 9.0 58 14.1 17.7 80 SOUTH PASS 9040 9.1 15.5 59 17.1 23.7 72 ST. LAWRENCE ALT 8620 1.7 4.6 37 11.5 13.0 88 TOGWOTEE PASS 9580 25.8 27.6 93 27.4 30.1 91 TOWNSEND CREEK 8700 3.9 6.9 57 15.4 16.5 93 ----- ----- Basin wide percent of average 80 87 BIGHORN BASIN BALD MTN. 9380 21.3 23.2 92 21.0 22.5 93 BEAR TRAP MEADOW 8200 2.0 1.3 154 12.0 11.9 101 BLACKWATER 9780 30.7 28.8 107 26.8 25.9 103 BONE SPRINGS DIV 9350 18.8 16.9 111 20.4 19.5 105 EVENING STAR 9200 33.8 32.8 103 37.6 31.2 121 GRAVE SPRINGS 8550 6.5 9.0 72 12.1 14.0 86 KIRWIN 9550 14.4 11.7 123 16.1 15.2 106 MARQUETTE 8760 -M 9.8 * -M 14.9 * MIDDLE POWDER 7760 9.3 12.2 76 11.3 16.8 67 OWL CREEK 8975 1.5 2.9 52 8.9 9.0 99 POWDER RIVER PASS 9480 9.9 9.0 110 16.4 16.9 97 SHELL CREEK 9580 16.9 16.5 102 17.4 17.9 97 SYLVAN LAKE 8420 23.2 21.6 107 29.1 25.9 112 SYLVAN ROAD 7120 8.5 4.6 185 21.0 21.3 99 TIMBER CREEK 7950 4.7 3.1 152 12.3 11.6 106 YOUNTS PEAK 8350 16.4 16.4 100 18.7 19.8 94 ----- ----- Basin wide percent of average 104 101 SHOSHONE RIVER BLACKWATER 9780 30.7 28.8 107 26.8 25.9 103 EVENING STAR 9200 33.8 32.8 103 37.6 31.2 121 KIRWIN 9550 14.4 11.7 123 16.1 15.2 106 MARQUETTE 8760 -M 9.8 * -M 14.9 * SYLVAN LAKE 8420 23.2 21.6 107 29.1 25.9 112 SYLVAN ROAD 7120 8.5 4.6 185 21.0 21.3 99 YOUNTS PEAK 8350 16.4 16.4 100 18.7 19.8 94 ----- ----- Basin wide percent of average 110 107 POWDER-TONGUE BEAR TRAP MEADOW 8200 2.0 1.3 154 12.0 11.9 101 BIG GOOSE 7990 11.5 10.0 115 17.4 13.9 125 BONE SPRINGS DIV 9350 18.8 16.9 111 20.4 19.5 105 BURGESS JUNCTION 7880 13.8 11.3 122 17.9 16.3 110 CLOUD PEAK RESERVOIR 9860 17.6 15.3 115 18.8 18.4 102 DOME LAKE 8880 12.2 11.5 106 19.6 17.9 109 GRAVE SPRINGS 8550 6.5 9.0 72 12.1 14.0 86 HANSEN SAWMILL 8360 3.4 3.2 106 14.2 11.9 119 MIDDLE POWDER 7760 9.3 12.2 76 11.3 16.8 67 POWDER RIVER PASS 9480 9.9 9.0 110 16.4 16.9 97 SUCKER CREEK 8880 15.1 11.2 135 20.8 18.6 112 TIE CREEK 6870 3.6 2.2 164 18.0 14.6 123 ----- ----- Basin wide percent of average 109 104 BELLE FOURCHE BLIND PARK 6890 .0 1.5 0 14.0 15.3 92 COLE CANYON 5910 .0 -M * 11.1 -M * NORTH RAPID CREEK 6130 .0 1.7 0 12.2 12.2 100 ----- ----- Basin wide percent of average 0 95 UPPER N. PLATTE RIVER COLUMBINE 9400 18.3 15.9 115 30.7 30.1 102 DIVIDE PEAK 8800 19.4 15.1 128 27.0 25.2 107 ELK RIVER 8700 12.9 10.2 126 24.9 23.9 104 JOE WRIGHT 10120 32.5 24.3 134 37.8 31.5 120 NORTH FRENCH CREEK 10100 37.9 33.7 112 37.3 31.0 120 OLD BATTLE 10000 -M 36.0 * -M 41.1 * SAGE CREEK BASIN 7850 .2 8.8 2 16.1 14.6 110 SOUTH BRUSH CREEK 8400 10.4 8.1 128 23.0 21.1 109 TOWER 10500 53.7 51.8 104 53.4 46.5 115 WEBBER SPRINGS 9200 17.4 20.6 84 30.8 32.1 96 WILLOW CREEK PASS 9540 22.5 12.3 183 20.9 16.6 126 ----- ----- Basin wide percent of average 112 111 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 20.1 24.9 81 26.9 28.2 95 CASPER MTN. 7900 10.8 13.6 79 15.8 20.8 76 DEADMAN HILL 10220 20.4 18.6 110 24.8 22.1 112 DEER PARK 9700 13.9 17.7 79 21.4 28.1 76 LAPRELE CREEK 8320 4.9 4.8 102 16.0 17.5 91 RENO HILL 8400 14.0 11.5 122 19.8 21.5 92 ROACH 9700 17.9 15.2 118 24.9 23.6 106 SAND LAKE 10080 34.0 36.0 94 30.2 30.8 98 SOUTH PASS 9040 9.1 15.5 59 17.1 23.7 72 WINDY PEAK 7840 6.0 2.8 214 16.3 14.5 112 ----- ----- Basin wide percent of average 94 92 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .1 2.0 5 20.0 19.3 104 DIVIDE PEAK 8800 19.4 15.1 128 27.0 25.2 107 OLD BATTLE 10000 -M 36.0 * -M 41.1 * SANDSTONE RS 8150 4.3 5.8 74 23.7 22.7 104 WHISKEY PARK 8950 31.1 27.9 111 34.3 35.0 98 ----- ----- Basin wide percent of average 108 103 UPPER GREEN RIVER BIG SANDY OPENING 9100 8.7 10.6 82 14.4 16.7 86 BLIND BULL SUM 8650 23.0 26.0 88 19.6 26.0 75 EAST RIM DIVIDE 7930 6.7 10.6 63 11.7 14.5 81 ELKHART PARK G.S. 9400 9.6 10.6 91 14.4 16.9 85 GROS VENTRE SUMMIT 8775 9.4 11.1 85 13.7 16.0 86 KENDALL R.S. 7740 .0 6.0 0 14.4 17.2 84 LOOMIS PARK 8240 7.2 11.3 64 18.4 20.7 89 NEW FORK LAKE 8340 3.1 5.4 57 -M 14.1 * SNIDER BASIN 8250 4.3 9.4 46 14.8 19.1 77 SPRING CREEK DIVIDE 9000 -M 26.1 * -M 31.0 * TRIPLE PEAK 8500 15.7 19.5 81 30.0 29.6 101 ----- ----- Basin wide percent of average 73 86 LOWER GREEN RIVER HAMS FORK 7840 1.1 2.8 39 13.9 15.4 90 HEWINTA 9500 4.4 6.2 71 15.2 18.5 82 HICKERSON PARK 9150 1.0 3.4 29 11.1 10.9 102 HOLE-IN-ROCK 9150 -M 2.8 * 12.2 10.4 117 INDIAN CREEK 9425 22.6 25.3 89 23.1 30.4 76 KELLEY R.S. 8180 8.0 10.9 73 16.7 24.4 68 STEEL CREEK PARK 10100 18.0 18.3 98 17.9 21.1 85 ----- ----- Basin wide percent of average 82 84 UPPER BEAR RIVER BUG LAKE 7950 11.7 13.4 87 20.1 23.2 87 HAYDEN FORK 9400 5.3 9.3 57 22.0 26.1 84 KELLEY R.S. 8180 8.0 10.9 73 16.7 24.4 68 LILY LAKE 9050 3.5 8.0 44 18.3 22.0 83 MONTE CRISTO 8960 12.0 24.7 49 26.1 31.4 83 SALT RIVER SUMMIT 7600 2.2 6.9 32 15.9 22.3 71 TRIAL LAKE 9960 14.6 24.4 60 22.0 30.5 72 ----- ----- Basin wide percent of average 59 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.