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 4 , 2002 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 5.3 11.1 48 22.7 24.6 92 COTTONWOOD CREEK 7600 14.2 18.5 77 24.6 32.2 76 GRANITE CREEK 6770 5.7 11.7 49 -M 22.5 * GRASSY LAKE 7265 23.4 31.9 73 38.5 41.1 94 GROS VENTRE SUMMIT 8775 13.1 12.6 104 14.8 15.4 96 LEWIS LAKE DIVIDE 7860 29.4 33.4 88 36.6 41.9 87 PHILLIPS BENCH 8200 23.5 28.3 83 28.0 33.3 84 SALT RIVER SUMMIT 7600 5.7 9.4 61 15.7 21.7 72 SNAKE RIVER STATION 6920 3.1 10.8 29 24.8 25.7 96 SPRING CREEK DIVIDE 9000 25.6 27.8 92 24.1 30.4 79 THUMB DIVIDE 7980 10.3 13.8 75 21.5 22.2 97 TOGWOTEE PASS 9580 24.2 27.8 87 23.8 29.2 82 TWO OCEAN PLATEAU 9360 32.3 31.6 102 29.3 32.4 90 WILLOW CREEK 8450 20.1 29.5 68 35.5 38.0 93 ----- ----- Basin wide percent of average 79 88 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 22.5 25.8 87 23.1 24.3 95 BLACK BEAR 8170 40.4 39.2 103 42.3 45.4 93 CANYON 8090 11.6 10.4 112 17.7 18.6 95 FISHER CREEK 9100 36.7 37.5 98 37.0 36.6 101 MADISON PLATEAU 7750 22.8 23.2 98 29.9 30.2 99 NORTHEAST ENTRANCE 7350 .5 6.3 8 13.0 14.9 87 PARKER PEAK 9400 22.6 24.4 93 20.2 21.5 94 SYLVAN LAKE 8420 19.7 23.1 85 26.1 27.4 95 THUMB DIVIDE 7980 10.3 13.8 75 21.5 22.2 97 TWO OCEAN PLATEAU 9360 32.3 31.6 102 29.3 32.4 90 WHISKEY CREEK 6800 14.8 14.0 106 24.3 24.4 100 WHITE MILL 8700 24.2 26.0 93 23.1 29.1 79 WOLVERINE 7650 .3 6.3 5 12.7 15.5 82 ----- ----- Basin wide percent of average 92 93 WIND RIVER BURROUGHS CREEK 8750 15.2 12.9 118 18.0 19.9 90 COLD SPRINGS 9630 .2 4.5 4 9.6 14.5 66 DEER PARK 9700 14.2 18.3 78 19.5 27.2 72 HOBBS PARK 10100 12.3 17.7 69 14.0 17.6 80 LITTLE WARM 9370 8.7 10.4 84 15.4 16.3 94 SOUTH PASS 9040 12.1 17.2 70 15.2 21.9 69 ST. LAWRENCE ALT 8620 .0 5.6 0 9.0 12.3 73 TOGWOTEE PASS 9580 24.2 27.8 87 23.8 29.2 82 TOWNSEND CREEK 8700 3.6 8.4 43 10.6 16.0 66 ----- ----- Basin wide percent of average 74 77 BIGHORN BASIN BALD MTN. 9380 18.6 23.5 79 17.3 21.9 79 BEAR TRAP MEADOW 8200 .3 2.1 14 10.5 11.6 91 BLACKWATER 9780 25.8 28.8 90 23.3 25.2 92 BONE SPRINGS DIV 9350 16.0 17.9 89 16.7 19.8 84 EVENING STAR 9200 27.3 33.1 82 30.8 31.5 98 GRAVE SPRINGS 8550 6.6 10.4 63 11.5 17.8 65 KIRWIN 9550 11.2 12.6 89 13.6 14.8 92 MARQUETTE 8760 6.0 10.8 56 8.9 13.7 65 MIDDLE POWDER 7760 6.6 13.6 49 10.6 16.0 66 OWL CREEK 8975 .0 3.6 0 6.5 8.8 74 POWDER RIVER PASS 9480 9.6 10.1 95 15.3 16.3 94 SHELL CREEK 9580 16.2 16.7 97 15.5 17.4 89 SYLVAN LAKE 8420 19.7 23.1 85 26.1 27.4 95 SYLVAN ROAD 7120 6.4 6.9 93 18.4 22.5 82 TIMBER CREEK 7950 .1 4.2 2 7.4 11.3 65 YOUNTS PEAK 8350 15.8 17.5 90 18.4 19.1 96 ----- ----- Basin wide percent of average 79 85 SHOSHONE RIVER BLACKWATER 9780 25.8 28.8 90 23.3 25.2 92 EVENING STAR 9200 27.3 33.1 82 30.8 31.5 98 KIRWIN 9550 11.2 12.6 89 13.6 14.8 92 MARQUETTE 8760 6.0 10.8 56 8.9 13.7 65 SYLVAN LAKE 8420 19.7 23.1 85 26.1 27.4 95 SYLVAN ROAD 7120 6.4 6.9 93 18.4 22.5 82 YOUNTS PEAK 8350 15.8 17.5 90 18.4 19.1 96 ----- ----- Basin wide percent of average 84 90 POWDER-TONGUE BEAR TRAP MEADOW 8200 .3 2.1 14 10.5 11.6 91 BIG GOOSE 7990 -M 11.1 * -M 14.0 * BONE SPRINGS DIV 9350 16.0 17.9 89 16.7 19.8 84 BURGESS JUNCTION 7880 10.4 12.6 83 12.7 15.8 80 CLOUD PEAK RESERVOIR 9860 15.9 15.9 100 16.6 18.5 90 DOME LAKE 8880 9.3 12.8 73 15.7 17.5 90 GRAVE SPRINGS 8550 6.6 10.4 63 11.5 17.8 65 HANSEN SAWMILL 8360 .9 4.3 21 11.1 11.7 95 MIDDLE POWDER 7760 6.6 13.6 49 10.6 16.0 66 POWDER RIVER PASS 9480 9.6 10.1 95 15.3 16.3 94 SUCKER CREEK 8880 11.0 12.5 88 16.7 18.2 92 TIE CREEK 6870 2.0 3.3 61 12.9 13.8 93 ----- ----- Basin wide percent of average 77 85 BELLE FOURCHE BLIND PARK 6890 .0 3.2 0 10.8 14.0 77 COLE CANYON 5910 -M 4.8 * -M -M * NORTH RAPID CREEK 6130 -M 3.1 * 8.6 11.9 72 ----- ----- Basin wide percent of average 0* 75 UPPER N. PLATTE RIVER COLUMBINE 9400 .0 19.2 0 20.5 29.3 70 DIVIDE PEAK 8800 7.7 17.9 43 20.5 24.5 84 ELK RIVER 8700 .2 13.4 1 17.3 23.2 75 JOE WRIGHT 10120 12.1 24.8 49 22.3 30.4 73 NORTH FRENCH CREEK 10100 16.0 34.2 47 23.2 30.0 77 OLD BATTLE 10000 22.8 36.6 62 28.4 40.1 71 SAGE CREEK BASIN 7850 -M -M * -M -M * SOUTH BRUSH CREEK 8400 .4 10.1 4 13.9 20.3 68 TOWER 10500 29.6 52.1 57 31.5 45.4 69 WEBBER SPRINGS 9200 8.7 23.6 37 21.2 31.3 68 WILLOW CREEK PASS 9540 6.7 13.6 49 10.5 15.9 66 ----- ----- Basin wide percent of average 42 72 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 12.4 27.1 46 16.3 27.2 60 CASPER MTN. 7900 4.0 15.9 25 11.0 19.8 56 DEADMAN HILL 10220 11.5 19.3 60 13.9 21.2 66 DEER PARK 9700 14.2 18.3 78 19.5 27.2 72 LAPRELE CREEK 8320 .2 6.3 3 11.6 16.7 69 RENO HILL 8400 5.1 13.6 38 13.2 20.4 65 ROACH 9700 5.3 17.4 30 14.3 22.7 63 SAND LAKE 10080 19.8 36.7 54 23.8 29.6 80 SOUTH PASS 9040 12.1 17.2 70 15.2 21.9 69 WINDY PEAK 7840 .0 4.2 0 9.7 13.7 71 ----- ----- Basin wide percent of average 48 67 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .3 3.7 8 11.9 18.7 64 DIVIDE PEAK 8800 7.7 17.9 43 20.5 24.5 84 OLD BATTLE 10000 22.8 36.6 62 28.4 40.1 71 SANDSTONE RS 8150 .0 8.3 0 16.1 22.1 73 WHISKEY PARK 8950 16.8 29.6 57 23.8 34.0 70 ----- ----- Basin wide percent of average 50 72 UPPER GREEN RIVER BIG SANDY OPENING 9100 13.0 12.5 104 14.0 16.1 87 BLIND BULL SUM 8650 -M 27.3 * 21.2 25.4 83 EAST RIM DIVIDE 7930 11.4 12.3 93 12.5 14.0 89 ELKHART PARK G.S. 9400 11.7 12.1 97 13.5 16.2 83 GROS VENTRE SUMMIT 8775 13.1 12.6 104 14.8 15.4 96 KENDALL R.S. 7740 2.9 8.7 33 15.1 16.7 90 LOOMIS PARK 8240 13.4 13.3 101 17.9 20.1 89 NEW FORK LAKE 8340 7.5 7.4 101 11.8 13.5 87 SNIDER BASIN 8250 5.5 11.6 47 14.0 18.7 75 SPRING CREEK DIVIDE 9000 25.6 27.8 92 24.1 30.4 79 TRIPLE PEAK 8500 18.3 22.3 82 26.3 28.8 91 ----- ----- Basin wide percent of average 87 86 LOWER GREEN RIVER HAMS FORK 7840 .7 5.0 14 11.0 14.9 74 HEWINTA 9500 -M 8.3 * 13.5 17.9 75 HICKERSON PARK 9150 .0 4.9 0 9.0 10.3 87 HOLE-IN-ROCK 9150 .0 4.1 0 8.3 9.9 84 INDIAN CREEK 9425 22.1 27.3 81 21.2 29.6 72 KELLEY R.S. 8180 10.4 13.0 80 18.0 23.8 76 STEEL CREEK PARK 10100 13.4 18.5 72 14.2 20.4 70 ----- ----- Basin wide percent of average 64 75 UPPER BEAR RIVER BUG LAKE 7950 12.8 16.5 78 19.0 22.6 84 HAYDEN FORK 9400 .7 11.8 6 19.5 25.3 77 KELLEY R.S. 8180 10.4 13.0 80 18.0 23.8 76 LILY LAKE 9050 .6 10.1 6 15.8 21.3 74 MONTE CRISTO 8960 20.7 27.1 76 27.1 30.5 89 SALT RIVER SUMMIT 7600 5.7 9.4 61 15.7 21.7 72 TRIAL LAKE 9960 12.4 25.8 48 21.5 29.7 72 ----- ----- Basin wide percent of average 56 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.