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 1 , 2005 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 4.8 12.3 39 16.2 24.4 66 COTTONWOOD CREEK 7600 14.4 19.8 73 25.2 31.9 79 GRANITE CREEK 6770 6.9 12.8 54 16.8 22.4 75 GRASSY LAKE 7265 19.1 33.4 57 27.1 40.9 66 GROS VENTRE SUMMIT 8750 10.6 13.3 80 12.6 15.3 82 LEWIS LAKE DIVIDE 7850 20.1 34.6 58 24.3 41.6 58 PHILLIPS BENCH 8200 21.1 29.4 72 24.5 33.1 74 SALT RIVER SUMMIT 7600 10.2 10.6 96 18.9 21.6 87 SNAKE RIVER STATION 6920 1.2 12.2 10 15.0 25.5 59 SPRING CREEK DIVIDE 9000 25.8 28.6 90 25.2 30.2 83 THUMB DIVIDE 7980 9.3 14.9 62 14.5 22.0 66 TOGWOTEE PASS 9580 18.2 27.9 65 19.2 29.0 66 TWO OCEAN PLATEAU 9240 26.8 31.8 84 20.8 32.1 65 WILLOW CREEK 8450 22.2 30.6 73 33.8 37.7 90 ----- ----- Basin wide percent of average 67 72 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 17.0 25.9 66 15.8 23.5 67 BLACK BEAR 8170 34.2 39.9 86 33.7 45.8 74 CANYON 8090 7.0 11.3 62 11.8 17.7 67 FISHER CREEK 9100 26.2 37.8 69 28.5 41.9 68 MADISON PLATEAU 7750 19.6 24.2 81 22.9 30.4 75 NORTHEAST ENTRANCE 7350 .0 7.1 0 8.8 14.8 59 PARKER PEAK 9400 17.4 24.5 71 14.8 19.5 76 SYLVAN LAKE 8420 11.8 23.8 50 18.8 24.7 76 THUMB DIVIDE 7980 9.3 14.9 62 14.5 22.0 66 TWO OCEAN PLATEAU 9240 26.8 31.8 84 20.8 32.1 65 WHISKEY CREEK 6800 12.2 15.2 80 18.3 24.2 76 WHITE MILL 8700 18.7 26.4 71 17.6 31.2 56 WOLVERINE 7650 .4 7.2 6 8.5 15.2 56 ----- ----- Basin wide percent of average 69 68 WIND RIVER BURROUGHS CREEK 8750 11.4 13.6 84 12.8 19.3 66 COLD SPRINGS 9630 3.6 4.8 75 10.5 13.9 76 DEER PARK 9700 24.5 18.6 132 28.1 27.0 104 HOBBS PARK 10100 17.8 18.0 99 17.5 16.9 104 LITTLE WARM 9370 7.6 11.1 68 11.6 16.8 69 SOUTH PASS 9040 19.6 18.0 109 23.4 22.7 103 ST. LAWRENCE ALT 8620 5.9 6.1 97 11.5 12.1 95 TOGWOTEE PASS 9580 18.2 27.9 65 19.2 29.0 66 TOWNSEND CREEK 8700 10.5 9.1 115 16.9 15.5 109 ----- ----- Basin wide percent of average 94 87 BIGHORN BASIN BALD MTN. 9380 16.7 23.6 71 17.5 21.3 82 BEAR TRAP MEADOW 8200 1.0 2.5 40 9.5 10.9 87 BLACKWATER 9780 16.8 28.8 58 16.2 24.7 66 BONE SPRINGS DIV 9350 14.6 18.3 80 16.5 18.3 90 EVENING STAR 9200 18.2 33.3 55 22.1 29.9 74 GRAVE SPRINGS 8550 5.9 11.1 53 9.9 13.1 76 KIRWIN 9550 9.1 13.0 70 10.8 14.2 76 MARQUETTE 8760 5.9 11.3 52 9.7 13.7 71 MIDDLE POWDER 7760 9.3 14.3 65 9.6 15.8 61 OWL CREEK 8975 2.3 4.0 57 8.0 8.2 98 POWDER RIVER PASS 9480 8.2 10.7 77 14.5 15.8 92 SHELL CREEK 9580 15.5 16.8 92 15.1 16.8 90 SYLVAN LAKE 8420 11.8 23.8 50 18.8 24.7 76 SYLVAN ROAD 7120 3.9 8.1 48 12.2 20.5 60 TIMBER CREEK 7950 2.3 4.8 48 7.0 10.5 67 YOUNTS PEAK 8350 11.9 18.1 66 13.0 18.8 69 ----- ----- Basin wide percent of average 63 76 SHOSHONE RIVER BLACKWATER 9780 16.8 28.8 58 16.2 24.7 66 EVENING STAR 9200 18.2 33.3 55 22.1 29.9 74 KIRWIN 9550 9.1 13.0 70 10.8 14.2 76 MARQUETTE 8760 5.9 11.3 52 9.7 13.7 71 SYLVAN LAKE 8420 11.8 23.8 50 18.8 24.7 76 SYLVAN ROAD 7120 3.9 8.1 48 12.2 20.5 60 YOUNTS PEAK 8350 11.9 18.1 66 13.0 18.8 69 ----- ----- Basin wide percent of average 57 70 POWDER-TONGUE BEAR TRAP MEADOW 8200 1.0 2.5 40 9.5 10.9 87 BIG GOOSE 7990 8.5 11.6 73 12.5 12.9 97 BONE SPRINGS DIV 9350 14.6 18.3 80 16.5 18.3 90 BURGESS JUNCTION 7880 10.8 13.3 81 12.8 15.4 83 CLOUD PEAK RESERVOIR 9860 15.2 16.2 94 15.7 17.1 92 DOME LAKE 8880 9.3 13.5 69 14.9 16.8 89 GRAVE SPRINGS 8550 5.9 11.1 53 9.9 13.1 76 HANSEN SAWMILL 8360 1.9 4.9 39 11.0 11.0 100 MIDDLE POWDER 7760 9.3 14.3 65 9.6 15.8 61 POWDER RIVER PASS 9480 8.2 10.7 77 14.5 15.8 92 SUCKER CREEK 8880 11.8 13.1 90 16.4 17.4 94 TIE CREEK 6870 .5 3.9 13 11.2 13.5 83 ----- ----- Basin wide percent of average 73 87 BELLE FOURCHE BLIND PARK 6890 .0 4.0 0 10.3 14.2 73 COLE CANYON 5910 .0 5.3 0 8.3 -M * NORTH RAPID CREEK 6130 .4 3.8 11 8.0 11.4 70 ----- ----- Basin wide percent of average 3 71 UPPER N. PLATTE RIVER COLUMBINE 9160 11.7 20.9 56 18.3 29.2 63 DIVIDE PEAK 8860 18.2 19.3 94 26.2 24.3 108 ELK RIVER 8700 13.8 15.0 92 24.0 23.0 104 JOE WRIGHT 10120 22.3 25.1 89 25.2 30.1 84 NORTH FRENCH CREEK 10130 27.0 34.5 78 27.2 29.7 92 OLD BATTLE 9920 38.4 36.9 104 38.9 39.9 97 SAGE CREEK BASIN 7850 2.9 11.2 26 17.8 14.1 126 SOUTH BRUSH CREEK 8440 7.4 11.1 67 15.8 20.1 79 TOWER 10500 41.4 52.2 79 42.4 45.1 94 WEBBER SPRINGS 9250 21.2 25.1 84 29.9 31.1 96 WILLOW CREEK PASS 9540 16.1 14.2 113 15.1 15.7 96 ----- ----- Basin wide percent of average 83 93 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10220 18.5 28.2 66 20.7 27.0 77 CASPER MTN. 7850 9.7 17.1 57 14.3 19.5 73 DEADMAN HILL 10220 17.7 19.7 90 17.6 21.0 84 DEER PARK 9700 24.5 18.6 132 28.1 27.0 104 LAPRELE CREEK 8375 .9 7.1 13 11.5 16.5 70 RENO HILL 8500 9.1 14.7 62 13.9 20.2 69 ROACH 9700 14.9 18.5 81 20.3 22.4 91 SAND LAKE 10050 25.3 37.0 68 25.3 29.3 86 SOUTH PASS 9040 19.6 18.0 109 23.4 22.7 103 WINDY PEAK 7900 3.4 4.9 69 10.5 13.5 78 ----- ----- Basin wide percent of average 78 85 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 4.6 0 17.0 18.6 91 DIVIDE PEAK 8860 18.2 19.3 94 26.2 24.3 108 OLD BATTLE 9920 38.4 36.9 104 38.9 39.9 97 SANDSTONE RS 8150 7.0 9.5 74 21.5 21.9 98 WHISKEY PARK 8950 25.7 30.5 84 28.8 33.8 85 ----- ----- Basin wide percent of average 89 96 UPPER GREEN RIVER BIG SANDY OPENING 9080 14.4 13.5 107 16.5 15.9 104 BLIND BULL SUM 8900 19.8 27.9 71 18.0 25.2 71 EAST RIM DIVIDE 7930 4.1 13.1 31 11.6 13.9 83 ELKHART PARK G.S. 9400 12.7 12.8 99 16.7 16.0 104 GROS VENTRE SUMMIT 8750 10.6 13.3 80 12.6 15.3 82 KENDALL R.S. 7740 3.7 10.0 37 14.1 16.6 85 LOOMIS PARK 8240 10.0 14.3 70 17.5 19.9 88 NEW FORK LAKE 8340 8.7 8.4 104 12.6 13.4 94 SNIDER BASIN 8060 11.6 12.6 92 15.1 18.5 82 SPRING CREEK DIVIDE 9000 25.8 28.6 90 25.2 30.2 83 TRIPLE PEAK 8500 15.2 23.7 64 22.4 28.6 78 ----- ----- Basin wide percent of average 77 85 LOWER GREEN RIVER HAMS FORK 7840 6.0 6.0 100 16.3 14.7 111 HEWINTA 9500 4.0 9.3 43 14.0 17.8 79 HICKERSON PARK 9100 2.8 5.7 49 11.8 10.2 116 HOLE-IN-ROCK 9150 1.9 4.7 40 11.5 9.7 119 INDIAN CREEK 9425 32.2 28.3 114 28.1 29.5 95 KELLEY R.S. 8180 14.8 14.1 105 22.3 23.6 94 STEEL CREEK PARK 10100 17.7 18.6 95 18.5 20.2 92 ----- ----- Basin wide percent of average 92 97 UPPER BEAR RIVER BUG LAKE 7950 21.5 18.0 119 26.9 22.4 120 HAYDEN FORK 9100 9.8 13.0 75 27.0 25.1 108 KELLEY R.S. 8180 14.8 14.1 105 22.3 23.6 94 LILY LAKE 9050 10.5 11.1 95 30.7 21.1 145 MONTE CRISTO 8960 32.2 28.3 114 34.5 30.3 114 SALT RIVER SUMMIT 7600 10.2 10.6 96 18.9 21.6 87 TRIAL LAKE 9960 32.4 26.5 122 33.6 29.4 114 ----- ----- Basin wide percent of average 108 112 ----------------------------------------------------------------------------- -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.