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 WEDNESDAY: MAY 7 , 2003 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 7.8 9.8 80 24.4 24.9 98 COTTONWOOD CREEK 7600 14.6 17.3 84 27.5 32.7 84 GRANITE CREEK 6770 3.6 10.7 34 18.4 22.9 80 GRASSY LAKE 7265 30.4 30.4 100 38.9 41.7 93 GROS VENTRE SUMMIT 8775 9.1 11.8 77 13.0 15.8 82 LEWIS LAKE DIVIDE 7860 32.8 32.2 102 34.9 42.3 83 PHILLIPS BENCH 8200 -M 27.1 * -M 33.8 * SALT RIVER SUMMIT 7600 2.8 8.2 34 15.4 22.1 70 SNAKE RIVER STATION 6920 4.6 9.4 49 24.6 26.1 94 SPRING CREEK DIVIDE 9000 24.4 26.9 91 25.5 30.8 83 THUMB DIVIDE 7980 12.2 12.7 96 20.7 22.5 92 TOGWOTEE PASS 9580 25.3 27.7 91 26.8 29.7 90 TWO OCEAN PLATEAU 9360 37.2 31.3 119 30.3 32.9 92 WILLOW CREEK 8450 24.0 28.3 85 39.2 38.6 102 ----- ----- Basin wide percent of average 89 89 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 30.4 25.7 118 26.5 24.2 110 BLACK BEAR 8170 -M 38.4 * -M 46.7 * CANYON 8090 13.1 9.5 138 18.6 18.2 102 FISHER CREEK 9100 41.1 37.3 110 39.2 42.8 92 MADISON PLATEAU 7750 22.3 22.2 100 26.8 31.2 86 NORTHEAST ENTRANCE 7350 3.7 5.5 67 16.1 15.3 105 PARKER PEAK 9400 29.6 24.3 122 24.5 20.2 121 SYLVAN LAKE 8420 23.1 22.3 104 28.9 25.5 113 THUMB DIVIDE 7980 12.2 12.7 96 20.7 22.5 92 TWO OCEAN PLATEAU 9360 37.2 31.3 119 30.3 32.9 92 WHISKEY CREEK 6800 11.4 12.9 88 21.2 24.8 85 WHITE MILL 8700 30.9 25.7 120 27.7 32.0 87 WOLVERINE 7650 1.5 5.5 27 14.3 15.8 91 ----- ----- Basin wide percent of average 109 97 WIND RIVER BURROUGHS CREEK 8750 16.2 12.2 133 21.0 19.9 106 COLD SPRINGS 9630 .4 4.2 10 11.6 14.5 80 DEER PARK 9700 12.7 18.0 71 20.0 27.8 72 HOBBS PARK 10100 12.8 17.4 74 15.3 17.7 86 LITTLE WARM 9370 4.9 9.7 51 13.1 17.4 75 SOUTH PASS 9040 8.7 16.3 53 16.1 23.3 69 ST. LAWRENCE ALT 8620 .1 5.1 2 9.9 12.7 78 TOGWOTEE PASS 9580 25.3 27.7 91 26.8 29.7 90 TOWNSEND CREEK 8700 2.3 7.6 30 13.6 16.1 84 ----- ----- Basin wide percent of average 71 82 BIGHORN BASIN BALD MTN. 9380 20.8 23.3 89 20.5 22.1 93 BEAR TRAP MEADOW 8200 1.6 1.7 94 11.3 11.5 98 BLACKWATER 9780 29.8 28.8 103 26.0 25.5 102 BONE SPRINGS DIV 9350 18.3 17.4 105 19.8 19.1 104 EVENING STAR 9200 33.6 33.0 102 37.1 30.8 120 GRAVE SPRINGS 8550 5.7 9.7 59 11.3 13.7 82 KIRWIN 9550 13.7 12.1 113 15.4 14.8 104 MARQUETTE 8760 14.5 10.3 141 17.5 14.5 121 MIDDLE POWDER 7760 8.5 12.9 66 10.4 16.4 63 OWL CREEK 8975 .2 3.3 6 7.8 8.8 89 POWDER RIVER PASS 9480 9.4 9.6 98 15.8 16.5 96 SHELL CREEK 9580 16.7 16.6 101 17.1 17.5 98 SYLVAN LAKE 8420 23.1 22.3 104 28.9 25.5 113 SYLVAN ROAD 7120 8.8 5.8 152 20.7 21.0 99 TIMBER CREEK 7950 2.8 3.7 76 10.0 11.3 88 YOUNTS PEAK 8350 16.2 16.9 96 18.2 19.4 94 ----- ----- Basin wide percent of average 98 100 SHOSHONE RIVER BLACKWATER 9780 29.8 28.8 103 26.0 25.5 102 EVENING STAR 9200 33.6 33.0 102 37.1 30.8 120 KIRWIN 9550 13.7 12.1 113 15.4 14.8 104 MARQUETTE 8760 14.5 10.3 141 17.5 14.5 121 SYLVAN LAKE 8420 23.1 22.3 104 28.9 25.5 113 SYLVAN ROAD 7120 8.8 5.8 152 20.7 21.0 99 YOUNTS PEAK 8350 16.2 16.9 96 18.2 19.4 94 ----- ----- Basin wide percent of average 108 108 POWDER-TONGUE BEAR TRAP MEADOW 8200 1.6 1.7 94 11.3 11.5 98 BIG GOOSE 7990 10.8 10.5 103 16.5 13.6 121 BONE SPRINGS DIV 9350 18.3 17.4 105 19.8 19.1 104 BURGESS JUNCTION 7880 13.3 12.0 111 17.1 16.0 107 CLOUD PEAK RESERVOIR 9860 16.6 15.6 106 17.8 18.0 99 DOME LAKE 8880 11.7 12.2 96 19.0 17.5 109 GRAVE SPRINGS 8550 5.7 9.7 59 11.3 13.7 82 HANSEN SAWMILL 8360 2.1 3.7 57 12.9 11.6 111 MIDDLE POWDER 7760 8.5 12.9 66 10.4 16.4 63 POWDER RIVER PASS 9480 9.4 9.6 98 15.8 16.5 96 SUCKER CREEK 8880 14.5 11.9 122 19.9 18.2 109 TIE CREEK 6870 2.8 2.8 100 17.3 14.2 122 ----- ----- Basin wide percent of average 96 102 BELLE FOURCHE BLIND PARK 6890 .0 2.3 0 13.4 14.9 90 COLE CANYON 5910 .0 -M * 11.0 -M * NORTH RAPID CREEK 6130 .0 2.4 0 11.5 11.9 97 ----- ----- Basin wide percent of average 0 93 UPPER N. PLATTE RIVER COLUMBINE 9400 17.7 17.6 101 29.8 29.8 100 DIVIDE PEAK 8800 18.5 16.5 112 25.7 24.9 103 ELK RIVER 8700 12.5 11.8 106 23.8 23.6 101 JOE WRIGHT 10120 30.6 24.5 125 36.1 31.0 116 NORTH FRENCH CREEK 10100 36.3 33.9 107 35.8 30.6 117 OLD BATTLE 10000 35.5 36.3 98 39.3 40.7 97 SAGE CREEK BASIN 7850 .0 9.6 0 14.9 14.4 103 SOUTH BRUSH CREEK 8400 9.9 9.1 109 22.2 20.8 107 TOWER 10500 51.6 51.9 99 51.9 46.0 113 WEBBER SPRINGS 9200 16.9 22.1 76 29.4 31.8 92 WILLOW CREEK PASS 9540 21.3 12.9 165 19.7 16.3 121 ----- ----- Basin wide percent of average 102 106 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 19.1 26.0 73 25.3 27.8 91 CASPER MTN. 7900 10.5 14.8 71 15.3 20.4 75 DEADMAN HILL 10220 19.7 19.0 104 23.8 21.7 110 DEER PARK 9700 12.7 18.0 71 20.0 27.8 72 LAPRELE CREEK 8320 5.8 5.6 104 15.7 17.2 91 RENO HILL 8400 13.7 12.6 109 19.1 21.1 91 ROACH 9700 17.7 16.3 109 23.8 23.2 103 SAND LAKE 10080 32.2 36.4 88 28.4 30.3 94 SOUTH PASS 9040 8.7 16.3 53 16.1 23.3 69 WINDY PEAK 7840 6.5 3.5 186 15.9 14.2 112 ----- ----- Basin wide percent of average 87 90 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .1 2.9 3 18.9 19.0 99 DIVIDE PEAK 8800 18.5 16.5 112 25.7 24.9 103 OLD BATTLE 10000 35.5 36.3 98 39.3 40.7 97 SANDSTONE RS 8150 3.8 7.1 54 22.5 22.5 100 WHISKEY PARK 8950 29.7 28.8 103 33.1 34.6 96 ----- ----- Basin wide percent of average 96 98 UPPER GREEN RIVER BIG SANDY OPENING 9100 7.2 11.6 62 12.6 16.4 77 BLIND BULL SUM 8650 22.6 26.6 85 18.9 25.8 73 EAST RIM DIVIDE 7930 6.8 11.4 60 11.3 14.3 79 ELKHART PARK G.S. 9400 -M 11.3 * -M 16.6 * GROS VENTRE SUMMIT 8775 9.1 11.8 77 13.0 15.8 82 KENDALL R.S. 7740 .1 7.3 1 14.2 17.0 84 LOOMIS PARK 8240 7.6 12.3 62 17.8 20.4 87 NEW FORK LAKE 8340 3.3 6.4 52 -M 13.9 * SNIDER BASIN 8250 4.7 10.5 45 14.2 18.9 75 SPRING CREEK DIVIDE 9000 24.4 26.9 91 25.5 30.8 83 TRIPLE PEAK 8500 15.7 20.9 75 29.2 29.2 100 ----- ----- Basin wide percent of average 70 83 LOWER GREEN RIVER HAMS FORK 7840 .1 3.9 3 12.0 15.1 79 HEWINTA 9500 3.8 7.2 53 14.3 18.3 78 HICKERSON PARK 9150 .0 4.2 0 9.6 10.7 90 HOLE-IN-ROCK 9150 .3 3.4 9 10.6 10.2 104 INDIAN CREEK 9425 21.3 26.3 81 21.6 30.1 72 KELLEY R.S. 8180 8.1 12.0 68 16.1 24.1 67 STEEL CREEK PARK 10100 16.8 18.4 91 16.6 20.8 80 ----- ----- Basin wide percent of average 67 78 UPPER BEAR RIVER BUG LAKE 7950 9.8 15.0 65 17.9 22.9 78 HAYDEN FORK 9400 4.2 10.6 40 21.5 25.8 83 KELLEY R.S. 8180 8.1 12.0 68 16.1 24.1 67 LILY LAKE 9050 2.5 9.0 28 17.8 21.7 82 MONTE CRISTO 8960 9.9 25.9 38 24.4 31.0 79 SALT RIVER SUMMIT 7600 2.8 8.2 34 15.4 22.1 70 TRIAL LAKE 9960 13.2 25.1 53 20.4 30.2 68 ----- ----- Basin wide percent of average 48 75 ----------------------------------------------------------------------------- -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.