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 MONDAY: MAY 7 , 2007 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 .0 9.8 0 21.4 24.9 86 COTTONWOOD CREEK 7600 10.3 17.3 60 25.5 32.7 78 GRANITE CREEK 6770 .0 10.7 0 17.3 22.9 76 GRASSY LAKE 7265 15.9 30.4 52 36.7 41.7 88 GROS VENTRE SUMMIT 8750 6.9 11.8 58 14.0 15.8 89 LEWIS LAKE DIVIDE 7850 16.0 32.2 50 32.6 42.3 77 PHILLIPS BENCH 8200 12.2 27.1 45 25.0 33.8 74 SALT RIVER SUMMIT 7600 .2 8.2 2 16.2 22.1 73 SNAKE RIVER STATION 6920 .0 9.4 0 23.6 26.1 90 SPRING CREEK DIVIDE 9000 19.7 26.9 73 22.9 30.8 74 THUMB DIVIDE 7980 .0 12.7 0 17.4 22.5 77 TOGWOTEE PASS 9580 18.1 27.7 65 23.4 29.7 79 TWO OCEAN PLATEAU 9240 25.3 31.3 81 25.7 32.9 78 WILLOW CREEK 8450 15.4 28.3 54 34.4 38.6 89 ----- ----- Basin wide percent of average 49 81 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 20.6 25.7 80 22.1 24.2 91 BLACK BEAR 8170 27.1 38.4 71 37.7 46.7 81 CANYON 8090 4.4 9.5 46 17.5 18.2 96 FISHER CREEK 9100 30.2 37.3 81 33.8 42.8 79 MADISON PLATEAU 7750 12.8 22.2 58 24.5 31.2 79 NORTHEAST ENTRANCE 7350 -M 5.5 * -M 15.3 * PARKER PEAK 9400 17.5 24.3 72 21.2 20.2 105 SYLVAN LAKE 8420 9.4 22.3 42 24.8 25.5 97 THUMB DIVIDE 7980 .0 12.7 0 17.4 22.5 77 TWO OCEAN PLATEAU 9240 25.3 31.3 81 25.7 32.9 78 WHISKEY CREEK 6800 4.5 12.9 35 19.0 24.8 77 WHITE MILL 8700 19.2 25.7 75 22.7 32.0 71 WOLVERINE 7650 .0 5.5 0 13.0 15.8 82 ----- ----- Basin wide percent of average 64 83 WIND RIVER BURROUGHS CREEK 8750 9.6 12.2 79 15.1 19.9 76 COLD SPRINGS 9630 2.4 4.2 57 12.8 14.5 88 DEER PARK 9700 11.4 18.0 63 21.0 27.8 76 HOBBS PARK 10100 15.7 17.4 90 19.0 17.7 107 LITTLE WARM 9370 4.6 9.7 47 14.0 17.4 80 SOUTH PASS 9040 8.6 16.3 53 18.1 23.3 78 ST. LAWRENCE ALT 8620 3.1 5.1 61 12.9 12.7 102 TOGWOTEE PASS 9580 18.1 27.7 65 23.4 29.7 79 TOWNSEND CREEK 8700 3.6 7.6 47 15.7 16.1 98 ----- ----- Basin wide percent of average 65 85 BIGHORN BASIN BALD MTN. 9380 23.9 23.3 103 19.8 22.1 90 BEAR TRAP MEADOW 8200 1.6 1.7 94 13.0 11.5 113 BLACKWATER 9780 21.7 28.8 75 23.3 25.5 91 BONE SPRINGS DIV 9350 20.6 17.4 118 23.1 19.1 121 EVENING STAR 9200 19.8 33.0 60 30.3 30.8 98 GRAVE SPRINGS 8550 5.8 9.7 60 11.9 13.7 87 KIRWIN 9550 11.9 12.1 98 16.9 14.8 114 MARQUETTE 8760 3.2 10.3 31 15.6 14.5 108 MIDDLE POWDER 7760 11.7 12.9 91 12.7 16.4 77 OWL CREEK 8975 .9 3.3 27 9.2 8.8 105 POWDER RIVER PASS 9480 6.7 9.6 70 15.7 16.5 95 SHELL CREEK 9580 17.6 16.6 106 17.3 17.5 99 SYLVAN LAKE 8420 9.4 22.3 42 24.8 25.5 97 SYLVAN ROAD 7120 .0 5.8 0 17.8 21.0 85 TIMBER CREEK 7950 1.5 3.7 41 12.1 11.3 107 YOUNTS PEAK 8350 8.8 16.9 52 15.7 19.4 81 ----- ----- Basin wide percent of average 73 97 SHOSHONE RIVER BLACKWATER 9780 21.7 28.8 75 23.3 25.5 91 EVENING STAR 9200 19.8 33.0 60 30.3 30.8 98 KIRWIN 9550 11.9 12.1 98 16.9 14.8 114 MARQUETTE 8760 3.2 10.3 31 15.6 14.5 108 SYLVAN LAKE 8420 9.4 22.3 42 24.8 25.5 97 SYLVAN ROAD 7120 .0 5.8 0 17.8 21.0 85 YOUNTS PEAK 8350 8.8 16.9 52 15.7 19.4 81 ----- ----- Basin wide percent of average 58 95 POWDER-TONGUE BEAR TRAP MEADOW 8200 1.6 1.7 94 13.0 11.5 113 BIG GOOSE 7990 10.7 10.5 102 18.8 13.6 138 BONE SPRINGS DIV 9350 20.6 17.4 118 23.1 19.1 121 BURGESS JUNCTION 7880 14.0 12.0 117 19.2 16.0 120 CLOUD PEAK RESERVOIR 9860 16.6 15.6 106 19.9 18.0 111 DOME LAKE 8880 13.2 12.2 108 22.0 17.5 126 GRAVE SPRINGS 8550 5.8 9.7 60 11.9 13.7 87 HANSEN SAWMILL 8360 1.5 3.7 41 13.1 11.6 113 MIDDLE POWDER 7760 11.7 12.9 91 12.7 16.4 77 POWDER RIVER PASS 9480 6.7 9.6 70 15.7 16.5 95 SUCKER CREEK 8880 14.9 11.9 125 -M 18.2 * TIE CREEK 6870 -M 2.8 * 16.8 14.2 118 ----- ----- Basin wide percent of average 100 111 BELLE FOURCHE BLIND PARK 6890 .0 2.3 0 12.8 14.9 86 COLE CANYON 5910 .2 4.3 5 13.4 -M * NORTH RAPID CREEK 6130 .0 2.4 0 12.0 11.9 101 ----- ----- Basin wide percent of average 2 93 UPPER N. PLATTE RIVER COLUMBINE 9160 .0 17.6 0 24.2 29.8 81 DIVIDE PEAK 8860 9.5 16.5 58 23.0 24.9 92 ELK RIVER 8700 .8 11.8 7 20.9 23.6 89 JOE WRIGHT 10120 22.5 24.5 92 27.4 31.0 88 NORTH FRENCH CREEK 10130 24.7 33.9 73 28.7 30.6 94 OLD BATTLE 9920 26.3 36.3 72 32.5 40.7 80 SAGE CREEK BASIN 7850 .2 9.6 2 15.0 14.4 104 SOUTH BRUSH CREEK 8440 .7 9.1 8 17.0 20.8 82 TOWER 10500 28.6 51.9 55 37.0 46.0 80 WEBBER SPRINGS 9250 11.4 22.1 52 26.9 31.8 85 WILLOW CREEK PASS 9540 15.6 12.9 121 16.1 16.3 99 ----- ----- Basin wide percent of average 57 87 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10220 19.3 26.0 74 24.4 27.8 88 CASPER MTN. 7850 8.0 14.8 54 17.6 20.4 86 DEADMAN HILL 10220 16.6 19.0 87 22.3 21.7 103 DEER PARK 9700 11.4 18.0 63 21.0 27.8 76 LAPRELE CREEK 8375 1.9 5.6 34 16.0 17.2 93 RENO HILL 8500 11.1 12.6 88 22.1 21.1 105 ROACH 9700 17.5 16.3 107 24.0 23.2 103 SAND LAKE 10050 28.3 36.4 78 30.6 30.3 101 SOUTH PASS 9040 8.6 16.3 53 18.1 23.3 78 WINDY PEAK 7900 2.0 3.5 57 15.5 14.2 109 ----- ----- Basin wide percent of average 74 93 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 2.9 0 15.6 19.0 82 DIVIDE PEAK 8860 9.5 16.5 58 23.0 24.9 92 OLD BATTLE 9920 26.3 36.3 72 32.5 40.7 80 SANDSTONE RS 8150 .9 7.1 13 18.0 22.5 80 WHISKEY PARK 8950 15.6 28.8 54 27.4 34.6 79 ----- ----- Basin wide percent of average 57 82 UPPER GREEN RIVER BIG SANDY OPENING 9080 4.4 11.6 38 13.1 16.4 80 BLIND BULL SUM 8900 22.6 26.6 85 19.3 25.8 75 EAST RIM DIVIDE 7930 .0 11.4 0 10.6 14.3 74 ELKHART PARK G.S. 9400 7.3 11.3 65 13.9 16.6 84 GROS VENTRE SUMMIT 8750 6.9 11.8 58 14.0 15.8 89 KENDALL R.S. 7740 .1 7.3 1 13.9 17.0 82 LOOMIS PARK 8240 .1 12.3 1 15.9 20.4 78 NEW FORK LAKE 8340 .0 6.4 0 10.7 13.9 77 SNIDER BASIN 8060 3.5 10.5 33 13.7 18.9 72 SPRING CREEK DIVIDE 9000 19.7 26.9 73 22.9 30.8 74 TRIPLE PEAK 8500 12.6 20.9 60 26.5 29.2 91 ----- ----- Basin wide percent of average 49 80 LOWER GREEN RIVER HAMS FORK 7840 .1 3.9 3 12.0 15.1 79 HEWINTA 9500 .1 7.2 1 15.7 18.3 86 HICKERSON PARK 9100 1.9 4.2 45 14.2 10.7 133 HOLE-IN-ROCK 9150 .9 3.4 26 12.6 10.2 124 INDIAN CREEK 9425 14.7 26.3 56 20.5 30.1 68 KELLEY R.S. 8180 5.6 12.0 47 18.0 24.1 75 STEEL CREEK PARK 10100 14.1 18.4 77 17.0 20.8 82 ----- ----- Basin wide percent of average 50 85 UPPER BEAR RIVER BUG LAKE 7950 6.6 15.0 44 17.8 22.9 78 HAYDEN FORK 9100 .5 10.6 5 22.8 25.8 88 KELLEY R.S. 8180 5.6 12.0 47 18.0 24.1 75 LILY LAKE 9050 1.8 9.0 20 18.0 21.7 83 MONTE CRISTO 8960 11.8 25.9 46 25.0 31.0 81 SALT RIVER SUMMIT 7600 .2 8.2 2 16.2 22.1 73 TRIAL LAKE 9960 10.4 25.1 41 23.1 30.2 76 ----- ----- Basin wide percent of average 35 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.