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 FRIDAY: APRIL 6 , 2007 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 10.9 17.6 62 19.7 22.1 89 COTTONWOOD CREEK 7600 18.6 24.1 77 22.9 28.5 80 GRANITE CREEK 6770 10.1 18.0 56 15.8 20.5 77 GRASSY LAKE 7265 26.6 36.4 73 33.6 37.1 91 GROS VENTRE SUMMIT 8750 10.0 14.5 69 11.8 13.4 88 LEWIS LAKE DIVIDE 7850 23.4 36.1 65 30.7 37.9 81 PHILLIPS BENCH 8200 18.7 29.7 63 22.9 30.0 76 SALT RIVER SUMMIT 7600 10.7 14.5 74 14.4 19.4 74 SNAKE RIVER STATION 6920 10.8 18.6 58 22.5 23.0 98 SPRING CREEK DIVIDE 9000 20.3 27.5 74 20.4 27.4 74 THUMB DIVIDE 7980 12.5 19.0 66 15.6 19.6 80 TOGWOTEE PASS 9580 17.7 25.7 69 20.1 25.6 79 TWO OCEAN PLATEAU 9240 25.3 29.2 87 23.0 28.7 80 WILLOW CREEK 8450 22.2 31.1 71 29.6 33.5 88 ----- ----- Basin wide percent of average 70 83 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 19.7 24.3 81 19.0 20.8 91 BLACK BEAR 8170 30.3 40.2 75 34.3 41.7 82 CANYON 8090 11.7 13.9 84 15.6 15.9 98 FISHER CREEK 9100 29.8 36.0 83 30.6 37.6 81 MADISON PLATEAU 7750 17.0 25.7 66 22.1 27.7 80 NORTHEAST ENTRANCE 7350 4.4 11.1 40 13.0 13.1 99 PARKER PEAK 9400 20.3 22.4 91 18.3 16.9 108 SYLVAN LAKE 8420 15.6 23.3 67 21.7 21.7 100 THUMB DIVIDE 7980 12.5 19.0 66 15.6 19.6 80 TWO OCEAN PLATEAU 9240 25.3 29.2 87 23.0 28.7 80 WHISKEY CREEK 6800 11.0 17.5 63 17.4 21.7 80 WHITE MILL 8700 19.7 25.1 78 20.5 27.9 73 WOLVERINE 7650 4.8 11.4 42 11.4 13.3 86 ----- ----- Basin wide percent of average 74 86 WIND RIVER BURROUGHS CREEK 8750 11.8 14.9 79 13.8 16.9 82 COLD SPRINGS 9630 3.3 8.3 40 9.5 11.2 85 DEER PARK 9700 12.7 17.1 74 16.4 22.9 72 HOBBS PARK 10100 13.4 15.7 85 13.3 13.6 98 LITTLE WARM 9370 8.2 12.2 67 10.3 14.1 73 SOUTH PASS 9040 12.9 17.1 75 14.4 19.3 75 ST. LAWRENCE ALT 8620 4.2 7.4 57 9.3 9.4 99 TOGWOTEE PASS 9580 17.7 25.7 69 20.1 25.6 79 TOWNSEND CREEK 8700 7.6 9.2 83 11.3 12.3 92 ----- ----- Basin wide percent of average 72 81 BIGHORN BASIN BALD MTN. 9380 20.2 20.6 98 15.2 18.1 84 BEAR TRAP MEADOW 8200 4.7 5.0 94 9.3 8.7 107 BLACKWATER 9780 20.7 25.6 81 19.7 21.4 92 BONE SPRINGS DIV 9350 18.2 16.9 108 16.6 15.3 108 EVENING STAR 9200 21.8 30.8 71 26.7 26.2 102 GRAVE SPRINGS 8550 7.9 9.9 80 8.1 10.3 79 KIRWIN 9550 10.3 11.8 87 12.1 11.8 103 MARQUETTE 8760 3.1 9.6 32 9.5 10.5 90 MIDDLE POWDER 7760 12.4 12.6 98 9.8 13.0 75 OWL CREEK 8975 4.2 5.5 76 6.6 6.3 105 POWDER RIVER PASS 9480 10.2 11.3 90 12.5 13.0 96 SHELL CREEK 9580 15.9 15.3 104 12.8 14.0 91 SYLVAN LAKE 8420 15.6 23.3 67 21.7 21.7 100 SYLVAN ROAD 7120 7.0 12.6 56 16.2 18.2 89 TIMBER CREEK 7950 3.2 5.8 55 8.9 7.9 113 YOUNTS PEAK 8350 10.9 17.6 62 13.7 16.7 82 ----- ----- Basin wide percent of average 80 94 SHOSHONE RIVER BLACKWATER 9780 20.7 25.6 81 19.7 21.4 92 EVENING STAR 9200 21.8 30.8 71 26.7 26.2 102 KIRWIN 9550 10.3 11.8 87 12.1 11.8 103 MARQUETTE 8760 3.1 9.6 32 9.5 10.5 90 SYLVAN LAKE 8420 15.6 23.3 67 21.7 21.7 100 SYLVAN ROAD 7120 7.0 12.6 56 16.2 18.2 89 YOUNTS PEAK 8350 10.9 17.6 62 13.7 16.7 82 ----- ----- Basin wide percent of average 68 95 POWDER-TONGUE BEAR TRAP MEADOW 8200 4.7 5.0 94 9.3 8.7 107 BIG GOOSE 7990 9.7 11.3 86 11.8 9.2 128 BONE SPRINGS DIV 9350 18.2 16.9 108 16.6 15.3 108 BURGESS JUNCTION 7880 13.1 12.2 107 13.8 12.7 109 CLOUD PEAK RESERVOIR 9860 14.4 14.1 102 12.9 13.6 95 DOME LAKE 8880 13.0 13.1 99 14.3 13.8 104 GRAVE SPRINGS 8550 7.9 9.9 80 8.1 10.3 79 HANSEN SAWMILL 8360 4.2 6.4 66 8.2 8.7 94 MIDDLE POWDER 7760 12.4 12.6 98 9.8 13.0 75 POWDER RIVER PASS 9480 10.2 11.3 90 12.5 13.0 96 SUCKER CREEK 8880 14.0 12.4 113 15.6 14.2 110 TIE CREEK 6870 3.3 5.8 57 12.3 10.5 117 ----- ----- Basin wide percent of average 95 102 BELLE FOURCHE BLIND PARK 6890 1.1 8.3 13 10.1 11.6 87 COLE CANYON 5910 2.8 6.1 46 9.2 -M * NORTH RAPID CREEK 6130 4.5 8.5 53 8.2 9.1 90 ----- ----- Basin wide percent of average 37 88 UPPER N. PLATTE RIVER COLUMBINE 9160 15.2 24.9 61 21.3 25.9 82 DIVIDE PEAK 8860 17.5 20.3 86 20.1 21.4 94 ELK RIVER 8700 13.1 19.6 67 17.7 20.2 88 JOE WRIGHT 10120 21.1 22.2 95 23.1 25.8 90 NORTH FRENCH CREEK 10130 24.8 30.6 81 24.3 25.6 95 OLD BATTLE 9920 24.2 33.2 73 28.5 35.6 80 SAGE CREEK BASIN 7850 6.3 11.8 53 12.8 12.4 103 SOUTH BRUSH CREEK 8440 9.7 13.2 73 14.7 17.0 86 TOWER 10500 30.9 47.1 66 33.2 39.7 84 WEBBER SPRINGS 9250 17.2 26.3 65 23.2 27.5 84 WILLOW CREEK PASS 9540 14.5 12.6 115 13.7 13.4 102 ----- ----- Basin wide percent of average 74 88 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10220 20.2 24.8 81 20.0 22.9 87 CASPER MTN. 7850 12.5 15.4 81 13.3 15.2 88 DEADMAN HILL 10220 14.2 17.1 83 18.2 17.7 103 DEER PARK 9700 12.7 17.1 74 16.4 22.9 72 LAPRELE CREEK 8375 7.1 10.7 66 11.0 13.2 83 RENO HILL 8500 13.9 14.9 93 16.2 15.9 102 ROACH 9700 17.2 17.6 98 19.4 19.3 101 SAND LAKE 10050 25.7 33.5 77 25.1 25.1 100 SOUTH PASS 9040 12.9 17.1 75 14.4 19.3 75 WINDY PEAK 7900 6.4 8.1 79 10.1 11.1 91 ----- ----- Basin wide percent of average 81 90 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 2.6 10.2 25 13.4 16.4 82 DIVIDE PEAK 8860 17.5 20.3 86 20.1 21.4 94 OLD BATTLE 9920 24.2 33.2 73 28.5 35.6 80 SANDSTONE RS 8150 7.8 14.3 55 15.2 19.3 79 WHISKEY PARK 8950 20.5 30.5 67 23.6 29.6 80 ----- ----- Basin wide percent of average 67 82 UPPER GREEN RIVER BIG SANDY OPENING 9080 11.1 14.9 74 11.2 13.9 81 BLIND BULL SUM 8900 22.0 28.5 77 17.4 22.9 76 EAST RIM DIVIDE 7930 5.4 13.6 40 9.6 12.5 77 ELKHART PARK G.S. 9400 10.0 13.7 73 11.9 13.8 86 GROS VENTRE SUMMIT 8750 10.0 14.5 69 11.8 13.4 88 KENDALL R.S. 7740 8.1 14.2 57 12.5 15.0 83 LOOMIS PARK 8240 9.7 17.4 56 14.3 18.0 79 NEW FORK LAKE 8340 8.1 11.3 72 9.1 11.7 78 SNIDER BASIN 8060 10.4 14.8 70 12.0 16.7 72 SPRING CREEK DIVIDE 9000 20.3 27.5 74 20.4 27.4 74 TRIPLE PEAK 8500 18.9 25.4 74 23.0 25.7 89 ----- ----- Basin wide percent of average 68 80 LOWER GREEN RIVER HAMS FORK 7840 6.9 11.3 61 10.4 12.7 82 HEWINTA 9500 4.6 12.2 38 12.5 15.2 82 HICKERSON PARK 9100 5.1 7.9 65 10.4 8.4 124 HOLE-IN-ROCK 9150 6.4 7.2 89 9.6 7.9 122 INDIAN CREEK 9425 19.5 28.7 68 18.4 26.3 70 KELLEY R.S. 8180 13.0 17.1 76 16.1 21.1 76 STEEL CREEK PARK 10100 12.2 16.4 74 13.3 16.9 79 ----- ----- Basin wide percent of average 67 84 UPPER BEAR RIVER BUG LAKE 7950 13.2 21.4 62 15.5 20.0 78 HAYDEN FORK 9100 3.3 16.6 20 19.5 21.9 89 KELLEY R.S. 8180 13.0 17.1 76 16.1 21.1 76 LILY LAKE 9050 9.1 13.9 65 14.3 18.2 79 MONTE CRISTO 8960 18.7 30.3 62 21.2 26.5 80 SALT RIVER SUMMIT 7600 10.7 14.5 74 14.4 19.4 74 TRIAL LAKE 9960 16.0 25.7 62 20.3 25.9 78 ----- ----- Basin wide percent of average 60 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.