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 THURSDAY: MAY 9 , 2002 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 3.8 9.0 42 23.1 25.0 92 COTTONWOOD CREEK 7600 11.6 16.4 71 24.8 32.8 76 GRANITE CREEK 6770 3.6 9.9 36 -M 22.9 * GRASSY LAKE 7265 21.9 29.5 74 39.6 41.8 95 GROS VENTRE SUMMIT 8775 11.8 11.4 104 15.0 15.8 95 LEWIS LAKE DIVIDE 7860 28.8 31.4 92 37.2 42.5 88 PHILLIPS BENCH 8200 22.0 26.4 83 28.4 33.9 84 SALT RIVER SUMMIT 7600 2.4 7.3 33 15.6 22.1 71 SNAKE RIVER STATION 6920 .0 8.5 0 25.3 26.1 97 SPRING CREEK DIVIDE 9000 24.0 26.4 91 24.1 30.8 78 THUMB DIVIDE 7980 9.1 11.9 76 22.1 22.6 98 TOGWOTEE PASS 9580 24.5 27.6 89 24.5 29.8 82 TWO OCEAN PLATEAU 9360 33.1 31.2 106 30.3 33.1 92 WILLOW CREEK 8450 18.0 27.6 65 35.9 38.8 93 ----- ----- Basin wide percent of average 78 88 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 24.2 25.7 94 24.4 24.8 98 BLACK BEAR 8170 40.3 38.0 106 42.9 46.1 93 CANYON 8090 10.6 8.9 119 18.1 19.0 95 FISHER CREEK 9100 39.5 37.1 106 38.7 37.4 103 MADISON PLATEAU 7750 21.9 21.5 102 30.3 30.8 98 NORTHEAST ENTRANCE 7350 .1 4.9 2 13.7 15.3 90 PARKER PEAK 9400 23.1 24.2 95 20.7 22.1 94 SYLVAN LAKE 8420 19.6 21.8 90 27.1 28.1 96 THUMB DIVIDE 7980 9.1 11.9 76 22.1 22.6 98 TWO OCEAN PLATEAU 9360 33.1 31.2 106 30.3 33.1 92 WHISKEY CREEK 6800 13.7 12.1 113 24.5 24.9 98 WHITE MILL 8700 25.6 25.4 101 24.5 29.7 82 WOLVERINE 7650 .0 4.9 0 13.6 15.9 86 ----- ----- Basin wide percent of average 97 95 WIND RIVER BURROUGHS CREEK 8750 14.8 11.8 125 18.6 20.3 92 COLD SPRINGS 9630 .0 3.9 0 9.7 15.1 64 DEER PARK 9700 13.3 17.8 75 19.5 27.8 70 HOBBS PARK 10100 12.3 17.3 71 14.2 18.3 78 LITTLE WARM 9370 7.5 9.2 82 16.0 16.9 95 SOUTH PASS 9040 10.1 15.8 64 15.2 22.5 68 ST. LAWRENCE ALT 8620 .0 4.7 0 9.3 12.9 72 TOGWOTEE PASS 9580 24.5 27.6 89 24.5 29.8 82 TOWNSEND CREEK 8700 .8 7.2 11 10.6 16.6 64 ----- ----- Basin wide percent of average 72 76 BIGHORN BASIN BALD MTN. 9380 18.7 23.3 80 17.3 22.5 77 BEAR TRAP MEADOW 8200 .0 1.5 0 10.6 12.1 88 BLACKWATER 9780 26.8 28.8 93 24.3 25.8 94 BONE SPRINGS DIV 9350 16.4 17.1 96 17.0 20.4 83 EVENING STAR 9200 28.7 32.8 88 32.1 32.2 100 GRAVE SPRINGS 8550 5.0 9.3 54 -M 18.3 * KIRWIN 9550 10.9 11.9 92 14.0 15.4 91 MARQUETTE 8760 3.8 9.9 38 8.8 14.4 61 MIDDLE POWDER 7760 5.2 12.5 42 10.6 16.6 64 OWL CREEK 8975 .0 3.0 0 6.4 9.3 69 POWDER RIVER PASS 9480 9.1 9.2 99 15.5 16.9 92 SHELL CREEK 9580 16.6 16.5 101 15.9 18.0 88 SYLVAN LAKE 8420 19.6 21.8 90 27.1 28.1 96 SYLVAN ROAD 7120 4.8 5.0 96 19.2 22.9 84 TIMBER CREEK 7950 .0 3.3 0 7.5 12.0 62 YOUNTS PEAK 8350 15.9 16.6 96 19.1 19.5 98 ----- ----- Basin wide percent of average 82 86 SHOSHONE RIVER BLACKWATER 9780 26.8 28.8 93 24.3 25.8 94 EVENING STAR 9200 28.7 32.8 88 32.1 32.2 100 KIRWIN 9550 10.9 11.9 92 14.0 15.4 91 MARQUETTE 8760 3.8 9.9 38 8.8 14.4 61 SYLVAN LAKE 8420 19.6 21.8 90 27.1 28.1 96 SYLVAN ROAD 7120 4.8 5.0 96 19.2 22.9 84 YOUNTS PEAK 8350 15.9 16.6 96 19.1 19.5 98 ----- ----- Basin wide percent of average 87 91 POWDER-TONGUE BEAR TRAP MEADOW 8200 .0 1.5 0 10.6 12.1 88 BIG GOOSE 7990 8.1 10.2 79 12.1 14.4 84 BONE SPRINGS DIV 9350 16.4 17.1 96 17.0 20.4 83 BURGESS JUNCTION 7880 10.1 11.5 88 13.0 16.3 80 CLOUD PEAK RESERVOIR 9860 15.3 15.4 99 16.6 19.3 86 DOME LAKE 8880 8.4 11.7 72 16.1 18.1 89 GRAVE SPRINGS 8550 5.0 9.3 54 -M 18.3 * HANSEN SAWMILL 8360 .0 3.4 0 11.3 12.3 92 MIDDLE POWDER 7760 5.2 12.5 42 10.6 16.6 64 POWDER RIVER PASS 9480 9.1 9.2 99 15.5 16.9 92 SUCKER CREEK 8880 10.6 11.4 93 17.1 18.9 90 TIE CREEK 6870 .6 2.4 25 13.2 14.4 92 ----- ----- Basin wide percent of average 77 85 BELLE FOURCHE BLIND PARK 6890 .0 1.8 0 10.5 14.7 71 COLE CANYON 5910 -M 4.0 * -M -M * NORTH RAPID CREEK 6130 -M 2.0 * 8.4 12.5 67 ----- ----- Basin wide percent of average 0* 69 UPPER N. PLATTE RIVER COLUMBINE 9400 .0 16.4 0 20.2 29.8 68 DIVIDE PEAK 8800 3.2 15.6 21 20.0 25.0 80 ELK RIVER 8700 .0 10.8 0 17.3 23.7 73 JOE WRIGHT 10120 9.8 24.4 40 22.1 31.1 71 NORTH FRENCH CREEK 10100 15.3 33.8 45 23.4 30.7 76 OLD BATTLE 10000 21.5 36.1 60 28.3 40.8 69 SAGE CREEK BASIN 7850 -M -M * -M -M * SOUTH BRUSH CREEK 8400 .0 8.5 0 14.0 20.9 67 TOWER 10500 27.0 51.8 52 31.7 46.2 69 WEBBER SPRINGS 9200 4.5 21.1 21 21.1 31.9 66 WILLOW CREEK PASS 9540 4.1 12.5 33 10.2 16.4 62 ----- ----- Basin wide percent of average 37 70 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 9.8 25.3 39 16.5 27.9 59 CASPER MTN. 7900 1.0 14.0 7 10.7 20.6 52 DEADMAN HILL 10220 9.8 18.7 52 13.8 21.8 63 DEER PARK 9700 13.3 17.8 75 19.5 27.8 70 LAPRELE CREEK 8320 .1 5.1 2 11.5 17.3 66 RENO HILL 8400 1.6 11.8 14 13.0 21.2 61 ROACH 9700 1.9 15.6 12 14.4 23.3 62 SAND LAKE 10080 19.7 36.1 55 24.2 30.4 80 SOUTH PASS 9040 10.1 15.8 64 15.2 22.5 68 WINDY PEAK 7840 .0 3.1 0 9.6 14.3 67 ----- ----- Basin wide percent of average 41 65 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 2.3 0 11.8 19.1 62 DIVIDE PEAK 8800 3.2 15.6 21 20.0 25.0 80 OLD BATTLE 10000 21.5 36.1 60 28.3 40.8 69 SANDSTONE RS 8150 .0 6.2 0 15.9 22.5 71 WHISKEY PARK 8950 15.0 28.2 53 23.8 34.7 69 ----- ----- Basin wide percent of average 45 70 UPPER GREEN RIVER BIG SANDY OPENING 9100 11.0 10.9 101 14.0 16.5 85 BLIND BULL SUM 8650 -M 26.2 * 21.5 25.8 83 EAST RIM DIVIDE 7930 10.4 10.9 95 12.5 14.4 87 ELKHART PARK G.S. 9400 10.5 10.9 96 13.8 16.7 83 GROS VENTRE SUMMIT 8775 11.8 11.4 104 15.0 15.8 95 KENDALL R.S. 7740 .0 6.4 0 15.1 17.0 89 LOOMIS PARK 8240 12.6 11.7 108 18.0 20.5 88 NEW FORK LAKE 8340 6.2 5.8 107 11.8 13.9 85 SNIDER BASIN 8250 1.2 9.8 12 13.9 19.0 73 SPRING CREEK DIVIDE 9000 24.0 26.4 91 24.1 30.8 78 TRIPLE PEAK 8500 15.1 19.9 76 26.3 29.4 89 ----- ----- Basin wide percent of average 83 85 LOWER GREEN RIVER HAMS FORK 7840 .6 3.2 19 10.9 15.3 71 HEWINTA 9500 -M 6.6 * 13.7 18.3 75 HICKERSON PARK 9150 .0 3.6 0 9.3 10.7 87 HOLE-IN-ROCK 9150 -M 3.0 * 8.7 10.3 84 INDIAN CREEK 9425 20.7 25.7 81 21.0 30.1 70 KELLEY R.S. 8180 7.6 11.2 68 17.9 24.2 74 STEEL CREEK PARK 10100 12.2 18.3 67 14.1 20.9 67 ----- ----- Basin wide percent of average 66 74 UPPER BEAR RIVER BUG LAKE 7950 9.1 13.9 65 19.1 23.0 83 HAYDEN FORK 9400 -M 9.7 * -M 25.9 * KELLEY R.S. 8180 7.6 11.2 68 17.9 24.2 74 LILY LAKE 9050 .0 8.4 0 15.9 21.8 73 MONTE CRISTO 8960 16.5 25.1 66 27.2 31.1 87 SALT RIVER SUMMIT 7600 2.4 7.3 33 15.6 22.1 71 TRIAL LAKE 9960 9.9 24.6 40 21.7 30.3 72 ----- ----- Basin wide percent of average 50 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.