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: APRIL 20 , 2005 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 8.8 15.4 57 15.7 23.4 67 COTTONWOOD CREEK 7600 16.6 22.6 73 23.2 30.4 76 GRANITE CREEK 6770 10.8 15.7 69 16.0 21.6 74 GRASSY LAKE 7265 24.0 35.9 67 27.0 39.2 69 GROS VENTRE SUMMIT 8750 11.4 14.2 80 11.4 14.5 79 LEWIS LAKE DIVIDE 7850 -M 36.0 * -M 40.0 * PHILLIPS BENCH 8200 21.7 30.2 72 23.2 31.7 73 SALT RIVER SUMMIT 7600 12.0 13.2 91 17.4 20.6 84 SNAKE RIVER STATION 6920 8.0 15.8 51 14.9 24.4 61 SPRING CREEK DIVIDE 9000 25.2 28.5 88 23.2 29.0 80 THUMB DIVIDE 7980 13.0 17.5 74 14.2 20.9 68 TOGWOTEE PASS 9580 17.8 27.1 66 18.3 27.5 67 TWO OCEAN PLATEAU 9240 26.0 31.0 84 20.3 30.6 66 WILLOW CREEK 8450 24.6 31.5 78 31.9 35.8 89 ----- ----- Basin wide percent of average 74 73 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 16.4 25.6 64 14.9 22.3 67 BLACK BEAR 8170 36.1 40.6 89 33.5 44.0 76 CANYON 8090 9.1 13.1 69 11.7 16.9 69 FISHER CREEK 9100 26.5 37.2 71 26.8 40.0 67 MADISON PLATEAU 7750 -M 25.5 * -M 29.2 * NORTHEAST ENTRANCE 7350 3.4 9.6 35 8.4 14.1 60 PARKER PEAK 9400 16.6 23.7 70 14.1 18.4 77 SYLVAN LAKE 8420 14.4 24.1 60 18.4 23.4 79 THUMB DIVIDE 7980 13.0 17.5 74 14.2 20.9 68 TWO OCEAN PLATEAU 9240 26.0 31.0 84 20.3 30.6 66 WHISKEY CREEK 6800 13.4 17.0 79 17.9 23.1 77 WHITE MILL 8700 18.4 26.1 70 17.3 29.8 58 WOLVERINE 7650 3.3 9.8 34 7.6 14.4 53 ----- ----- Basin wide percent of average 71 69 WIND RIVER BURROUGHS CREEK 8750 10.6 14.6 73 11.2 18.2 62 COLD SPRINGS 9630 3.8 6.4 59 9.0 12.7 71 DEER PARK 9700 22.0 17.6 125 25.5 25.2 101 HOBBS PARK 10100 14.8 17.2 86 14.4 15.4 94 LITTLE WARM 9370 7.7 12.1 64 10.3 15.6 66 SOUTH PASS 9040 18.8 17.8 106 21.3 21.2 100 ST. LAWRENCE ALT 8620 5.1 6.9 74 9.6 10.9 88 TOGWOTEE PASS 9580 17.8 27.1 66 18.3 27.5 67 TOWNSEND CREEK 8700 10.1 9.6 105 14.9 14.1 106 ----- ----- Basin wide percent of average 86 84 BIGHORN BASIN BALD MTN. 9380 16.3 22.4 73 16.3 19.9 82 BEAR TRAP MEADOW 8200 .3 4.0 8 7.5 9.9 76 BLACKWATER 9780 15.9 27.5 58 15.0 23.2 65 BONE SPRINGS DIV 9350 13.6 17.9 76 15.2 17.0 89 EVENING STAR 9200 18.1 32.4 56 21.1 28.3 75 GRAVE SPRINGS 8550 5.9 10.8 55 8.8 11.9 74 KIRWIN 9550 8.0 12.5 64 9.1 13.1 69 MARQUETTE 8760 5.1 10.8 47 8.1 12.3 66 MIDDLE POWDER 7760 8.1 14.1 57 8.1 14.6 55 OWL CREEK 8975 2.0 4.8 42 6.4 7.4 86 POWDER RIVER PASS 9480 8.0 11.5 70 12.7 14.6 87 SHELL CREEK 9580 14.1 16.3 87 13.3 15.6 85 SYLVAN LAKE 8420 14.4 24.1 60 18.4 23.4 79 SYLVAN ROAD 7120 7.0 10.8 65 11.8 19.5 61 TIMBER CREEK 7950 1.3 5.4 24 5.3 9.4 56 YOUNTS PEAK 8350 11.2 18.1 62 11.7 17.9 65 ----- ----- Basin wide percent of average 61 73 SHOSHONE RIVER BLACKWATER 9780 15.9 27.5 58 15.0 23.2 65 EVENING STAR 9200 18.1 32.4 56 21.1 28.3 75 KIRWIN 9550 8.0 12.5 64 9.1 13.1 69 MARQUETTE 8760 5.1 10.8 47 8.1 12.3 66 SYLVAN LAKE 8420 14.4 24.1 60 18.4 23.4 79 SYLVAN ROAD 7120 7.0 10.8 65 11.8 19.5 61 YOUNTS PEAK 8350 11.2 18.1 62 11.7 17.9 65 ----- ----- Basin wide percent of average 59 69 POWDER-TONGUE BEAR TRAP MEADOW 8200 .3 4.0 8 7.5 9.9 76 BIG GOOSE 7990 7.1 12.2 58 10.3 11.3 91 BONE SPRINGS DIV 9350 13.6 17.9 76 15.2 17.0 89 BURGESS JUNCTION 7880 9.9 13.2 75 11.6 14.2 82 CLOUD PEAK RESERVOIR 9860 13.2 15.6 85 12.8 15.6 82 DOME LAKE 8880 8.2 13.8 59 12.5 15.5 81 GRAVE SPRINGS 8550 5.9 10.8 55 8.8 11.9 74 HANSEN SAWMILL 8360 1.3 5.8 22 8.6 10.0 86 MIDDLE POWDER 7760 8.1 14.1 57 8.1 14.6 55 POWDER RIVER PASS 9480 8.0 11.5 70 12.7 14.6 87 SUCKER CREEK 8880 10.8 13.4 81 14.6 16.0 91 TIE CREEK 6870 .1 4.9 2 9.6 12.2 79 ----- ----- Basin wide percent of average 63 81 BELLE FOURCHE BLIND PARK 6890 .0 6.5 0 8.7 13.1 66 COLE CANYON 5910 .0 5.6 0 7.2 -M * NORTH RAPID CREEK 6130 .1 7.2 1 7.0 10.4 67 ----- ----- Basin wide percent of average 1 67 UPPER N. PLATTE RIVER COLUMBINE 9160 12.2 23.5 52 21.2 27.8 76 DIVIDE PEAK 8860 17.1 20.4 84 23.3 23.0 101 ELK RIVER 8700 14.0 18.2 77 21.6 21.8 99 JOE WRIGHT 10120 19.7 24.1 82 21.8 28.2 77 NORTH FRENCH CREEK 10130 23.1 33.2 70 23.8 27.9 85 OLD BATTLE 9920 33.6 35.4 95 36.4 38.0 96 SAGE CREEK BASIN 7850 6.5 11.8 55 16.1 13.4 120 SOUTH BRUSH CREEK 8440 7.4 12.6 59 13.8 18.7 74 TOWER 10500 36.1 50.3 72 37.6 42.7 88 WEBBER SPRINGS 9250 19.9 25.8 77 27.1 29.5 92 WILLOW CREEK PASS 9540 13.7 13.8 99 13.5 14.7 92 ----- ----- Basin wide percent of average 76 90 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10220 16.7 27.0 62 18.9 25.2 75 CASPER MTN. 7850 8.6 16.9 51 12.9 17.6 73 DEADMAN HILL 10220 15.3 18.7 82 15.2 19.5 78 DEER PARK 9700 22.0 17.6 125 25.5 25.2 101 LAPRELE CREEK 8375 1.9 9.2 21 9.8 15.1 65 RENO HILL 8500 8.6 15.5 55 12.0 18.3 66 ROACH 9700 13.3 18.4 72 18.0 21.0 86 SAND LAKE 10050 22.3 35.6 63 22.4 27.4 82 SOUTH PASS 9040 18.8 17.8 106 21.3 21.2 100 WINDY PEAK 7900 4.2 7.0 60 8.5 12.4 69 ----- ----- Basin wide percent of average 72 81 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 1.9 7.4 26 15.4 17.6 88 DIVIDE PEAK 8860 17.1 20.4 84 23.3 23.0 101 OLD BATTLE 9920 33.6 35.4 95 36.4 38.0 96 SANDSTONE RS 8150 8.1 12.2 66 18.8 20.8 90 WHISKEY PARK 8950 24.1 30.6 79 25.6 32.0 80 ----- ----- Basin wide percent of average 80 91 UPPER GREEN RIVER BIG SANDY OPENING 9080 14.6 14.7 99 15.4 15.0 103 BLIND BULL SUM 8900 19.7 28.6 69 16.6 24.2 69 EAST RIM DIVIDE 7930 7.3 13.7 53 10.5 13.3 79 ELKHART PARK G.S. 9400 12.7 13.6 93 15.0 15.0 100 GROS VENTRE SUMMIT 8750 11.4 14.2 80 11.4 14.5 79 KENDALL R.S. 7740 8.5 12.5 68 13.4 15.9 84 LOOMIS PARK 8240 12.6 16.2 78 16.3 19.1 85 NEW FORK LAKE 8340 10.4 10.4 100 11.4 12.7 90 SNIDER BASIN 8060 12.7 14.2 89 14.3 17.7 81 SPRING CREEK DIVIDE 9000 25.2 28.5 88 23.2 29.0 80 TRIPLE PEAK 8500 16.8 25.2 67 21.1 27.3 77 ----- ----- Basin wide percent of average 79 83 LOWER GREEN RIVER HAMS FORK 7840 8.6 8.8 98 13.7 13.8 99 HEWINTA 9500 6.2 11.4 54 13.0 16.7 78 HICKERSON PARK 9100 5.1 7.5 68 11.4 9.4 121 HOLE-IN-ROCK 9150 3.5 6.5 54 10.4 8.9 117 INDIAN CREEK 9425 29.4 29.2 101 25.2 28.1 90 KELLEY R.S. 8180 15.7 16.2 97 20.0 22.5 89 STEEL CREEK PARK 10100 16.5 17.7 93 17.0 18.8 90 ----- ----- Basin wide percent of average 87 94 UPPER BEAR RIVER BUG LAKE 7950 20.5 20.5 100 23.3 21.3 109 HAYDEN FORK 9100 12.0 15.4 78 25.7 23.7 108 KELLEY R.S. 8180 15.7 16.2 97 20.0 22.5 89 LILY LAKE 9050 13.0 13.4 97 20.8 19.8 105 MONTE CRISTO 8960 -M 29.9 * -M 28.6 * SALT RIVER SUMMIT 7600 12.0 13.2 91 17.4 20.6 84 TRIAL LAKE 9960 30.3 26.4 115 31.4 27.9 113 ----- ----- Basin wide percent of average 98 102 ----------------------------------------------------------------------------- -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.