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 SUNDAY: MAY 11 , 2003 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 6.3 8.2 77 24.5 25.3 97 COTTONWOOD CREEK 7600 13.9 15.6 89 27.8 33.2 84 GRANITE CREEK 6770 1.1 9.2 12 18.7 23.2 81 GRASSY LAKE 7265 29.5 28.5 104 38.9 42.3 92 GROS VENTRE SUMMIT 8775 9.3 10.9 85 13.7 16.1 85 LEWIS LAKE DIVIDE 7860 31.8 30.6 104 34.9 42.8 82 PHILLIPS BENCH 8200 21.6 25.6 84 27.1 34.2 79 SALT RIVER SUMMIT 7600 2.0 6.5 31 15.9 22.4 71 SNAKE RIVER STATION 6920 1.6 7.6 21 24.6 26.4 93 SPRING CREEK DIVIDE 9000 -M 25.8 * -M 31.1 * THUMB DIVIDE 7980 11.0 11.2 98 20.8 22.9 91 TOGWOTEE PASS 9580 25.8 27.5 94 27.5 30.2 91 TWO OCEAN PLATEAU 9360 37.7 31.0 122 30.5 33.5 91 WILLOW CREEK 8450 24.5 26.8 91 40.0 39.3 102 ----- ----- Basin wide percent of average 90 88 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 30.6 25.6 120 27.0 24.6 110 BLACK BEAR 8170 41.1 37.5 110 39.7 47.3 84 CANYON 8090 12.9 8.3 155 18.6 18.6 100 FISHER CREEK 9100 41.7 36.9 113 40.0 43.4 92 MADISON PLATEAU 7750 21.3 20.8 102 26.8 31.7 85 NORTHEAST ENTRANCE 7350 1.9 4.4 43 16.2 15.7 103 PARKER PEAK 9400 29.9 24.1 124 24.8 20.7 120 SYLVAN LAKE 8420 23.2 21.3 109 29.1 26.1 111 THUMB DIVIDE 7980 11.0 11.2 98 20.8 22.9 91 TWO OCEAN PLATEAU 9360 37.7 31.0 122 30.5 33.5 91 WHISKEY CREEK 6800 10.5 11.3 93 21.3 25.2 85 WHITE MILL 8700 31.1 25.2 123 28.0 32.5 86 WOLVERINE 7650 1.2 4.3 28 14.7 16.2 91 ----- ----- Basin wide percent of average 112 94 WIND RIVER BURROUGHS CREEK 8750 16.6 11.3 147 21.7 20.4 106 COLD SPRINGS 9630 2.1 3.7 57 13.3 14.9 89 DEER PARK 9700 14.4 17.6 82 22.0 28.3 78 HOBBS PARK 10100 13.9 17.1 81 16.9 18.2 93 LITTLE WARM 9370 5.2 8.7 60 14.2 17.8 80 SOUTH PASS 9040 9.5 15.2 62 17.6 23.8 74 ST. LAWRENCE ALT 8620 1.8 4.4 41 11.7 13.1 89 TOGWOTEE PASS 9580 25.8 27.5 94 27.5 30.2 91 TOWNSEND CREEK 8700 4.1 6.7 61 15.6 16.6 94 ----- ----- Basin wide percent of average 83 88 BIGHORN BASIN BALD MTN. 9380 21.4 23.2 92 21.0 22.6 93 BEAR TRAP MEADOW 8200 2.0 1.2 167 12.2 12.0 102 BLACKWATER 9780 30.9 28.8 107 26.9 26.1 103 BONE SPRINGS DIV 9350 19.1 16.8 114 20.7 19.6 106 EVENING STAR 9200 33.9 32.7 104 37.6 31.4 120 GRAVE SPRINGS 8550 6.5 8.8 74 12.3 14.1 87 KIRWIN 9550 14.9 11.6 128 16.6 15.3 108 MARQUETTE 8760 -M 9.6 * -M 15.1 * MIDDLE POWDER 7760 9.6 12.0 80 11.6 16.9 69 OWL CREEK 8975 1.5 2.8 54 8.9 9.1 98 POWDER RIVER PASS 9480 10.0 8.8 114 16.6 17.0 98 SHELL CREEK 9580 17.0 16.4 104 17.4 18.0 97 SYLVAN LAKE 8420 23.2 21.3 109 29.1 26.1 111 SYLVAN ROAD 7120 8.2 4.2 195 21.0 21.4 98 TIMBER CREEK 7950 4.8 2.9 166 12.4 11.8 105 YOUNTS PEAK 8350 16.4 16.2 101 18.7 19.9 94 ----- ----- Basin wide percent of average 106 101 SHOSHONE RIVER BLACKWATER 9780 30.9 28.8 107 26.9 26.1 103 EVENING STAR 9200 33.9 32.7 104 37.6 31.4 120 KIRWIN 9550 14.9 11.6 128 16.6 15.3 108 MARQUETTE 8760 -M 9.6 * -M 15.1 * SYLVAN LAKE 8420 23.2 21.3 109 29.1 26.1 111 SYLVAN ROAD 7120 8.2 4.2 195 21.0 21.4 98 YOUNTS PEAK 8350 16.4 16.2 101 18.7 19.9 94 ----- ----- Basin wide percent of average 111 107 POWDER-TONGUE BEAR TRAP MEADOW 8200 2.0 1.2 167 12.2 12.0 102 BIG GOOSE 7990 11.9 9.8 121 17.9 14.0 128 BONE SPRINGS DIV 9350 19.1 16.8 114 20.7 19.6 106 BURGESS JUNCTION 7880 14.1 11.1 127 18.1 16.4 110 CLOUD PEAK RESERVOIR 9860 18.0 15.2 118 19.1 18.6 103 DOME LAKE 8880 12.5 11.3 111 20.1 18.0 112 GRAVE SPRINGS 8550 6.5 8.8 74 12.3 14.1 87 HANSEN SAWMILL 8360 3.5 3.0 117 14.4 12.0 120 MIDDLE POWDER 7760 9.6 12.0 80 11.6 16.9 69 POWDER RIVER PASS 9480 10.0 8.8 114 16.6 17.0 98 SUCKER CREEK 8880 15.6 11.0 142 21.3 18.7 114 TIE CREEK 6870 4.1 2.0 205 18.9 14.7 129 ----- ----- Basin wide percent of average 114 106 BELLE FOURCHE BLIND PARK 6890 .0 1.2 0 14.2 15.4 92 COLE CANYON 5910 .0 -M * 11.5 -M * NORTH RAPID CREEK 6130 .0 1.5 0 12.7 12.2 104 ----- ----- Basin wide percent of average 0 97 UPPER N. PLATTE RIVER COLUMBINE 9400 18.1 15.3 118 30.9 30.2 102 DIVIDE PEAK 8800 19.6 14.7 133 27.3 25.3 108 ELK RIVER 8700 13.1 9.7 135 25.2 24.0 105 JOE WRIGHT 10120 33.3 24.2 138 38.8 31.6 123 NORTH FRENCH CREEK 10100 38.4 33.6 114 37.9 31.2 121 OLD BATTLE 10000 37.6 35.9 105 41.4 41.3 100 SAGE CREEK BASIN 7850 .0 8.5 0 16.1 14.7 110 SOUTH BRUSH CREEK 8400 10.8 7.8 138 23.7 21.2 112 TOWER 10500 54.4 51.7 105 54.2 46.7 116 WEBBER SPRINGS 9200 17.6 20.1 88 30.9 32.3 96 WILLOW CREEK PASS 9540 22.9 12.1 189 21.3 16.7 128 ----- ----- Basin wide percent of average 114 110 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 20.5 24.6 83 27.2 28.3 96 CASPER MTN. 7900 11.5 13.2 87 16.5 21.0 79 DEADMAN HILL 10220 21.5 18.5 116 26.1 22.2 118 DEER PARK 9700 14.4 17.6 82 22.0 28.3 78 LAPRELE CREEK 8320 -M 4.6 * 16.9 17.7 95 RENO HILL 8400 14.6 11.1 132 20.3 21.7 94 ROACH 9700 18.5 14.9 124 25.4 23.7 107 SAND LAKE 10080 34.7 35.9 97 31.3 30.9 101 SOUTH PASS 9040 9.5 15.2 62 17.6 23.8 74 WINDY PEAK 7840 6.1 2.6 235 16.4 14.7 112 ----- ----- Basin wide percent of average 99 95 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .1 1.7 6 20.1 19.3 104 DIVIDE PEAK 8800 19.6 14.7 133 27.3 25.3 108 OLD BATTLE 10000 37.6 35.9 105 41.4 41.3 100 SANDSTONE RS 8150 4.4 5.4 81 24.0 22.8 105 WHISKEY PARK 8950 31.7 27.6 115 34.9 35.1 99 ----- ----- Basin wide percent of average 109 103 UPPER GREEN RIVER BIG SANDY OPENING 9100 8.8 10.3 85 14.5 16.8 86 BLIND BULL SUM 8650 23.0 25.8 89 19.7 26.1 75 EAST RIM DIVIDE 7930 6.6 10.3 64 11.7 14.6 80 ELKHART PARK G.S. 9400 9.7 10.4 93 14.5 17.0 85 GROS VENTRE SUMMIT 8775 9.3 10.9 85 13.7 16.1 85 KENDALL R.S. 7740 .0 5.5 0 14.6 17.2 85 LOOMIS PARK 8240 7.3 11.0 66 18.6 20.7 90 NEW FORK LAKE 8340 3.3 5.1 65 -M 14.2 * SNIDER BASIN 8250 4.5 9.1 49 14.9 19.1 78 SPRING CREEK DIVIDE 9000 -M 25.8 * -M 31.1 * TRIPLE PEAK 8500 15.7 19.0 83 30.0 29.7 101 ----- ----- Basin wide percent of average 75 86 LOWER GREEN RIVER HAMS FORK 7840 1.0 2.5 40 14.0 15.4 91 HEWINTA 9500 4.9 5.9 83 15.7 18.6 84 HICKERSON PARK 9150 -M 3.1 * 12.2 11.0 111 HOLE-IN-ROCK 9150 -M 2.6 * 13.2 10.5 126 INDIAN CREEK 9425 22.9 25.0 92 23.3 30.5 76 KELLEY R.S. 8180 8.1 10.5 77 16.6 24.4 68 STEEL CREEK PARK 10100 18.5 18.2 102 18.4 21.2 87 ----- ----- Basin wide percent of average 89 86 UPPER BEAR RIVER BUG LAKE 7950 11.7 12.9 91 20.1 23.3 86 HAYDEN FORK 9400 5.2 8.9 58 22.2 26.2 85 KELLEY R.S. 8180 8.1 10.5 77 16.6 24.4 68 LILY LAKE 9050 3.7 7.7 48 18.6 22.1 84 MONTE CRISTO 8960 11.9 24.3 49 26.3 31.5 83 SALT RIVER SUMMIT 7600 2.0 6.5 31 15.9 22.4 71 TRIAL LAKE 9960 14.7 24.1 61 22.2 30.7 72 ----- ----- Basin wide percent of average 60 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.