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 TUESDAY: MARCH 13 , 2007 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 -M 17.1 * 17.8 19.8 90 COTTONWOOD CREEK 7600 17.2 21.0 82 20.1 24.9 81 GRANITE CREEK 6770 11.5 17.6 65 14.6 18.4 79 GRASSY LAKE 7265 26.1 32.3 81 31.7 33.1 96 GROS VENTRE SUMMIT 8750 8.5 12.7 67 10.4 11.7 89 LEWIS LAKE DIVIDE 7850 24.2 32.4 75 28.9 33.7 86 PHILLIPS BENCH 8200 17.0 26.1 65 21.0 26.5 79 SALT RIVER SUMMIT 7600 10.3 13.2 78 12.9 17.0 76 SNAKE RIVER STATION 6920 13.3 18.1 73 21.3 20.7 103 SPRING CREEK DIVIDE 9000 17.2 24.1 71 17.6 24.2 73 THUMB DIVIDE 7980 11.9 17.1 70 13.7 17.2 80 TOGWOTEE PASS 9580 16.5 22.4 74 18.6 22.3 83 TWO OCEAN PLATEAU 9240 22.1 25.3 87 20.8 25.2 83 WILLOW CREEK 8450 21.2 27.6 77 25.8 29.2 88 ----- ----- Basin wide percent of average 75 85 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 16.9 21.6 78 16.4 18.3 90 BLACK BEAR 8170 30.9 35.9 86 32.8 36.2 91 CANYON 8090 10.9 12.5 87 14.0 14.0 100 FISHER CREEK 9100 26.8 31.9 84 27.6 33.0 84 MADISON PLATEAU 7750 17.3 22.9 76 20.8 24.0 87 NORTHEAST ENTRANCE 7350 7.7 10.5 73 11.6 11.6 100 PARKER PEAK 9400 16.8 19.7 85 15.7 14.7 107 SYLVAN LAKE 8420 14.1 20.3 69 19.4 19.1 102 THUMB DIVIDE 7980 11.9 17.1 70 13.7 17.2 80 TWO OCEAN PLATEAU 9240 22.1 25.3 87 20.8 25.2 83 WHISKEY CREEK 6800 11.7 15.7 75 16.7 18.9 88 WHITE MILL 8700 17.3 22.0 79 18.3 24.5 75 WOLVERINE 7650 7.7 11.2 69 10.2 11.9 86 ----- ----- Basin wide percent of average 80 89 WIND RIVER BURROUGHS CREEK 8750 11.1 13.4 83 12.8 14.7 87 COLD SPRINGS 9630 5.0 7.9 63 6.4 9.3 69 DEER PARK 9700 9.7 15.2 64 13.0 19.5 67 HOBBS PARK 10100 8.6 12.9 67 8.8 11.1 79 LITTLE WARM 9370 6.9 10.4 66 8.6 11.9 72 SOUTH PASS 9040 10.4 15.2 68 11.2 16.4 68 ST. LAWRENCE ALT 8620 4.4 6.5 68 5.4 7.7 70 TOGWOTEE PASS 9580 16.5 22.4 74 18.6 22.3 83 TOWNSEND CREEK 8700 5.7 7.5 76 8.5 10.0 85 ----- ----- Basin wide percent of average 70 76 BIGHORN BASIN BALD MTN. 9380 15.7 17.4 90 12.5 15.4 81 BEAR TRAP MEADOW 8200 4.9 4.8 102 5.7 7.1 80 BLACKWATER 9780 17.9 22.1 81 17.1 18.6 92 BONE SPRINGS DIV 9350 13.8 14.2 97 12.8 12.8 100 EVENING STAR 9200 19.9 27.0 74 24.3 23.2 105 GRAVE SPRINGS 8550 5.8 8.1 72 5.8 8.5 68 KIRWIN 9550 7.9 10.0 79 9.8 10.0 98 MARQUETTE 8760 2.4 7.5 32 6.7 8.4 80 MIDDLE POWDER 7760 7.8 9.9 79 6.5 10.7 61 OWL CREEK 8975 4.8 4.6 104 5.1 5.0 102 POWDER RIVER PASS 9480 7.8 9.6 81 8.9 10.9 82 SHELL CREEK 9580 12.4 12.8 97 9.7 11.8 82 SYLVAN LAKE 8420 14.1 20.3 69 19.4 19.1 102 SYLVAN ROAD 7120 8.4 12.1 69 14.7 16.5 89 TIMBER CREEK 7950 2.2 4.8 46 5.3 6.2 85 YOUNTS PEAK 8350 10.4 15.5 67 13.1 14.6 90 ----- ----- Basin wide percent of average 78 89 SHOSHONE RIVER BLACKWATER 9780 17.9 22.1 81 17.1 18.6 92 EVENING STAR 9200 19.9 27.0 74 24.3 23.2 105 KIRWIN 9550 7.9 10.0 79 9.8 10.0 98 MARQUETTE 8760 2.4 7.5 32 6.7 8.4 80 SYLVAN LAKE 8420 14.1 20.3 69 19.4 19.1 102 SYLVAN ROAD 7120 8.4 12.1 69 14.7 16.5 89 YOUNTS PEAK 8350 10.4 15.5 67 13.1 14.6 90 ----- ----- Basin wide percent of average 71 95 POWDER-TONGUE BEAR TRAP MEADOW 8200 4.9 4.8 102 5.7 7.1 80 BIG GOOSE 7990 5.8 8.6 67 7.2 7.5 96 BONE SPRINGS DIV 9350 13.8 14.2 97 12.8 12.8 100 BURGESS JUNCTION 7880 9.5 9.9 96 10.2 10.5 97 CLOUD PEAK RESERVOIR 9860 10.0 11.2 89 8.9 11.0 81 DOME LAKE 8880 8.8 10.4 85 9.7 11.4 85 GRAVE SPRINGS 8550 5.8 8.1 72 5.8 8.5 68 HANSEN SAWMILL 8360 3.0 5.7 53 4.5 7.0 64 MIDDLE POWDER 7760 7.8 9.9 79 6.5 10.7 61 POWDER RIVER PASS 9480 7.8 9.6 81 8.9 10.9 82 SUCKER CREEK 8880 10.9 10.0 109 11.8 11.7 101 TIE CREEK 6870 4.3 5.7 75 8.8 8.7 101 ----- ----- Basin wide percent of average 85 86 BELLE FOURCHE BLIND PARK 6890 5.2 8.1 64 8.6 10.0 86 COLE CANYON 5910 5.4 5.5 98 7.3 -M * NORTH RAPID CREEK 6130 5.9 7.4 80 7.1 7.9 90 ----- ----- Basin wide percent of average 79 88 UPPER N. PLATTE RIVER COLUMBINE 9160 18.6 23.5 79 19.7 22.6 87 DIVIDE PEAK 8860 16.5 17.4 95 17.8 18.5 96 ELK RIVER 8700 16.8 17.5 96 15.9 17.5 91 JOE WRIGHT 10120 18.7 18.8 99 20.8 22.0 95 NORTH FRENCH CREEK 10130 21.9 25.1 87 21.0 22.0 95 OLD BATTLE 9920 21.8 28.8 76 26.3 30.9 85 SAGE CREEK BASIN 7850 11.4 10.1 113 11.2 10.8 104 SOUTH BRUSH CREEK 8440 11.6 11.4 102 12.9 14.5 89 TOWER 10500 29.7 40.7 73 30.4 34.5 88 WEBBER SPRINGS 9250 17.1 23.9 72 21.1 23.9 88 WILLOW CREEK PASS 9540 12.9 10.5 123 12.4 11.4 109 ----- ----- Basin wide percent of average 87 92 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10220 17.2 20.7 83 17.2 19.3 89 CASPER MTN. 7850 9.3 12.3 76 10.3 12.4 83 DEADMAN HILL 10220 14.2 14.2 100 15.7 14.7 107 DEER PARK 9700 9.7 15.2 64 13.0 19.5 67 LAPRELE CREEK 8375 7.6 9.8 78 8.8 11.0 80 RENO HILL 8500 11.1 11.8 94 11.9 12.9 92 ROACH 9700 14.8 15.1 98 16.5 16.4 101 SAND LAKE 10050 21.8 28.2 77 21.2 21.2 100 SOUTH PASS 9040 10.4 15.2 68 11.2 16.4 68 WINDY PEAK 7900 6.8 7.0 97 8.5 9.3 91 ----- ----- Basin wide percent of average 82 88 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 8.9 11.0 81 11.9 13.7 87 DIVIDE PEAK 8860 16.5 17.4 95 17.8 18.5 96 OLD BATTLE 9920 21.8 28.8 76 26.3 30.9 85 SANDSTONE RS 8150 10.2 14.0 73 14.0 16.9 83 WHISKEY PARK 8950 20.6 26.8 77 22.0 25.5 86 ----- ----- Basin wide percent of average 80 87 UPPER GREEN RIVER BIG SANDY OPENING 9080 10.7 13.1 82 10.6 12.2 87 BLIND BULL SUM 8900 19.7 25.3 78 15.3 20.4 75 EAST RIM DIVIDE 7930 7.5 11.9 63 8.6 11.0 78 ELKHART PARK G.S. 9400 8.6 12.1 71 10.1 11.9 85 GROS VENTRE SUMMIT 8750 8.5 12.7 67 10.4 11.7 89 KENDALL R.S. 7740 9.3 13.7 68 11.1 13.4 83 LOOMIS PARK 8240 10.3 16.0 64 12.9 15.9 81 NEW FORK LAKE 8340 7.7 10.4 74 8.4 10.3 82 SNIDER BASIN 8060 9.7 13.4 72 10.7 14.7 73 SPRING CREEK DIVIDE 9000 17.2 24.1 71 17.6 24.2 73 TRIPLE PEAK 8500 17.2 22.8 75 20.0 22.4 89 ----- ----- Basin wide percent of average 72 81 LOWER GREEN RIVER HAMS FORK 7840 8.6 12.0 72 8.7 11.1 78 HEWINTA 9500 8.1 10.2 79 12.1 12.8 95 HICKERSON PARK 9100 6.1 6.4 95 8.9 6.9 129 HOLE-IN-ROCK 9150 6.7 6.3 106 8.2 6.5 126 INDIAN CREEK 9425 19.0 24.7 77 16.3 22.9 71 KELLEY R.S. 8180 12.3 15.4 80 14.6 18.5 79 STEEL CREEK PARK 10100 10.5 14.0 75 12.6 14.2 89 ----- ----- Basin wide percent of average 80 88 UPPER BEAR RIVER BUG LAKE 7950 13.2 18.8 70 14.0 17.5 80 HAYDEN FORK 9100 11.1 14.7 76 18.6 18.7 99 KELLEY R.S. 8180 12.3 15.4 80 14.6 18.5 79 LILY LAKE 9050 11.3 11.7 97 13.7 15.6 88 MONTE CRISTO 8960 19.0 27.2 70 19.5 22.9 85 SALT RIVER SUMMIT 7600 10.3 13.2 78 12.9 17.0 76 TRIAL LAKE 9960 14.2 22.7 63 17.9 22.3 80 ----- ----- Basin wide percent of average 74 84 ----------------------------------------------------------------------------- -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.