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: MARCH 30 , 2007 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 10.7 18.0 59 18.1 21.5 84 COTTONWOOD CREEK 7600 17.6 23.9 74 21.5 27.5 78 GRANITE CREEK 6770 9.8 18.5 53 14.7 19.9 74 GRASSY LAKE 7265 25.7 35.7 72 32.2 36.1 89 GROS VENTRE SUMMIT 8750 9.5 14.2 67 11.1 12.9 86 LEWIS LAKE DIVIDE 7850 21.9 35.4 62 -M 36.8 * PHILLIPS BENCH 8200 17.4 28.9 60 21.5 29.1 74 SALT RIVER SUMMIT 7600 10.0 14.5 69 13.4 18.8 71 SNAKE RIVER STATION 6920 11.3 19.1 59 21.4 22.3 96 SPRING CREEK DIVIDE 9000 18.7 26.6 70 18.9 26.5 71 THUMB DIVIDE 7980 11.6 19.0 61 14.3 18.9 76 TOGWOTEE PASS 9580 16.6 24.9 67 18.9 24.6 77 TWO OCEAN PLATEAU 9240 23.2 28.1 83 21.5 27.7 78 WILLOW CREEK 8450 20.3 30.3 67 27.3 32.2 85 ----- ----- Basin wide percent of average 67 80 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 17.5 23.4 75 16.8 20.1 84 BLACK BEAR 8170 30.4 39.4 77 33.0 40.4 82 CANYON 8090 11.1 13.8 80 14.6 15.4 95 FISHER CREEK 9100 27.8 35.0 79 28.7 36.4 79 MADISON PLATEAU 7750 16.6 25.2 66 21.0 26.8 78 NORTHEAST ENTRANCE 7350 3.9 11.2 35 12.0 12.7 94 PARKER PEAK 9400 17.8 21.7 82 16.7 16.2 103 SYLVAN LAKE 8420 13.9 22.5 62 20.1 20.9 96 THUMB DIVIDE 7980 11.6 19.0 61 14.3 18.9 76 TWO OCEAN PLATEAU 9240 23.2 28.1 83 21.5 27.7 78 WHISKEY CREEK 6800 10.6 17.2 62 16.7 21.0 80 WHITE MILL 8700 18.0 24.3 74 18.9 27.0 70 WOLVERINE 7650 4.3 11.6 37 10.3 12.8 80 ----- ----- Basin wide percent of average 71 83 WIND RIVER BURROUGHS CREEK 8750 11.2 14.6 77 13.1 16.2 81 COLD SPRINGS 9630 3.4 8.9 38 9.0 10.6 85 DEER PARK 9700 11.8 16.9 70 15.4 21.8 71 HOBBS PARK 10100 12.6 14.9 85 12.4 12.7 98 LITTLE WARM 9370 7.4 11.8 63 9.0 13.3 68 SOUTH PASS 9040 12.2 16.5 74 13.6 18.4 74 ST. LAWRENCE ALT 8620 3.9 7.3 53 8.9 8.8 101 TOGWOTEE PASS 9580 16.6 24.9 67 18.9 24.6 77 TOWNSEND CREEK 8700 7.6 8.7 87 11.1 11.5 97 ----- ----- Basin wide percent of average 70 81 BIGHORN BASIN BALD MTN. 9380 -M 19.6 * -M 17.3 * BEAR TRAP MEADOW 8200 4.3 5.2 83 8.7 8.2 106 BLACKWATER 9780 18.7 24.5 76 17.9 20.5 87 BONE SPRINGS DIV 9350 17.5 16.2 108 15.5 14.5 107 EVENING STAR 9200 20.3 29.8 68 25.2 25.3 100 GRAVE SPRINGS 8550 7.4 9.3 80 7.4 9.6 77 KIRWIN 9550 9.6 11.3 85 11.2 11.2 100 MARQUETTE 8760 2.1 8.8 24 8.5 9.7 88 MIDDLE POWDER 7760 11.7 11.6 101 8.6 12.2 70 OWL CREEK 8975 4.0 5.5 73 6.3 5.8 109 POWDER RIVER PASS 9480 9.5 10.8 88 11.7 12.2 96 SHELL CREEK 9580 15.3 14.7 104 12.3 13.2 93 SYLVAN LAKE 8420 13.9 22.5 62 20.1 20.9 96 SYLVAN ROAD 7120 6.6 12.8 52 15.1 17.7 85 TIMBER CREEK 7950 2.5 5.7 44 8.4 7.3 115 YOUNTS PEAK 8350 10.2 17.1 60 13.1 16.1 81 ----- ----- Basin wide percent of average 75 93 SHOSHONE RIVER BLACKWATER 9780 18.7 24.5 76 17.9 20.5 87 EVENING STAR 9200 20.3 29.8 68 25.2 25.3 100 KIRWIN 9550 9.6 11.3 85 11.2 11.2 100 MARQUETTE 8760 2.1 8.8 24 8.5 9.7 88 SYLVAN LAKE 8420 13.9 22.5 62 20.1 20.9 96 SYLVAN ROAD 7120 6.6 12.8 52 15.1 17.7 85 YOUNTS PEAK 8350 10.2 17.1 60 13.1 16.1 81 ----- ----- Basin wide percent of average 64 92 POWDER-TONGUE BEAR TRAP MEADOW 8200 4.3 5.2 83 8.7 8.2 106 BIG GOOSE 7990 9.3 10.5 89 11.4 8.4 136 BONE SPRINGS DIV 9350 17.5 16.2 108 15.5 14.5 107 BURGESS JUNCTION 7880 12.8 11.5 111 13.4 12.0 112 CLOUD PEAK RESERVOIR 9860 13.7 13.3 103 12.3 12.7 97 DOME LAKE 8880 12.7 12.4 102 13.8 13.0 106 GRAVE SPRINGS 8550 7.4 9.3 80 7.4 9.6 77 HANSEN SAWMILL 8360 4.0 6.4 62 7.9 8.1 98 MIDDLE POWDER 7760 11.7 11.6 101 8.6 12.2 70 POWDER RIVER PASS 9480 9.5 10.8 88 11.7 12.2 96 SUCKER CREEK 8880 13.9 11.6 120 15.1 13.4 113 TIE CREEK 6870 2.7 6.1 44 11.6 9.8 118 ----- ----- Basin wide percent of average 96 102 BELLE FOURCHE BLIND PARK 6890 1.4 8.7 16 9.8 11.0 89 COLE CANYON 5910 2.7 6.1 44 8.8 -M * NORTH RAPID CREEK 6130 4.3 8.2 52 8.0 8.5 94 ----- ----- Basin wide percent of average 37 91 UPPER N. PLATTE RIVER COLUMBINE 9160 16.3 24.9 65 20.2 25.0 81 DIVIDE PEAK 8860 17.7 19.7 90 19.7 20.6 96 ELK RIVER 8700 14.0 19.4 72 17.1 19.5 88 JOE WRIGHT 10120 19.5 21.2 92 22.1 24.6 90 NORTH FRENCH CREEK 10130 23.5 29.0 81 23.1 24.5 94 OLD BATTLE 9920 23.4 32.0 73 27.4 34.4 80 SAGE CREEK BASIN 7850 7.5 11.4 66 12.2 12.0 102 SOUTH BRUSH CREEK 8440 9.9 13.0 76 14.1 16.2 87 TOWER 10500 29.8 45.3 66 31.9 38.2 84 WEBBER SPRINGS 9250 17.1 26.2 65 22.5 26.5 85 WILLOW CREEK PASS 9540 14.3 11.9 120 13.5 12.7 106 ----- ----- Basin wide percent of average 76 88 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10220 19.1 23.6 81 18.8 21.8 86 CASPER MTN. 7850 12.5 14.4 87 12.7 14.2 89 DEADMAN HILL 10220 15.3 16.2 94 17.8 16.8 106 DEER PARK 9700 11.8 16.9 70 15.4 21.8 71 LAPRELE CREEK 8375 7.8 10.9 72 10.5 12.4 85 RENO HILL 8500 14.1 14.0 101 15.7 14.8 106 ROACH 9700 16.7 17.0 98 18.8 18.5 102 SAND LAKE 10050 23.9 32.2 74 23.3 23.9 97 SOUTH PASS 9040 12.2 16.5 74 13.6 18.4 74 WINDY PEAK 7900 6.5 8.0 81 9.9 10.5 94 ----- ----- Basin wide percent of average 82 90 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 5.3 11.0 48 12.9 15.7 82 DIVIDE PEAK 8860 17.7 19.7 90 19.7 20.6 96 OLD BATTLE 9920 23.4 32.0 73 27.4 34.4 80 SANDSTONE RS 8150 8.6 14.7 59 14.9 18.6 80 WHISKEY PARK 8950 20.2 30.0 67 23.0 28.5 81 ----- ----- Basin wide percent of average 70 83 UPPER GREEN RIVER BIG SANDY OPENING 9080 12.3 14.5 85 10.4 13.4 78 BLIND BULL SUM 8900 20.3 28.0 72 16.1 22.3 72 EAST RIM DIVIDE 7930 5.3 13.2 40 8.9 12.1 74 ELKHART PARK G.S. 9400 9.0 13.4 67 10.6 13.2 80 GROS VENTRE SUMMIT 8750 9.5 14.2 67 11.1 12.9 86 KENDALL R.S. 7740 7.7 14.5 53 11.2 14.6 77 LOOMIS PARK 8240 9.2 17.3 53 13.2 17.4 76 NEW FORK LAKE 8340 7.8 11.2 70 8.4 11.3 74 SNIDER BASIN 8060 9.9 14.6 68 11.4 16.1 71 SPRING CREEK DIVIDE 9000 18.7 26.6 70 18.9 26.5 71 TRIPLE PEAK 8500 17.2 25.0 69 21.1 24.8 85 ----- ----- Basin wide percent of average 66 77 LOWER GREEN RIVER HAMS FORK 7840 7.4 12.0 62 10.1 12.2 83 HEWINTA 9500 6.0 11.9 50 12.3 14.5 85 HICKERSON PARK 9100 6.0 7.6 79 10.1 7.9 128 HOLE-IN-ROCK 9150 6.7 7.1 94 9.5 7.4 128 INDIAN CREEK 9425 18.6 27.8 67 17.7 25.4 70 KELLEY R.S. 8180 12.9 16.9 76 15.6 20.4 76 STEEL CREEK PARK 10100 12.3 15.7 78 13.0 16.1 81 ----- ----- Basin wide percent of average 71 85 UPPER BEAR RIVER BUG LAKE 7950 13.2 21.0 63 15.0 19.3 78 HAYDEN FORK 9100 6.1 16.4 37 19.2 20.9 92 KELLEY R.S. 8180 12.9 16.9 76 15.6 20.4 76 LILY LAKE 9050 10.0 13.3 75 14.1 17.4 81 MONTE CRISTO 8960 18.5 29.8 62 20.7 25.4 81 SALT RIVER SUMMIT 7600 10.0 14.5 69 13.4 18.8 71 TRIAL LAKE 9960 15.9 25.0 64 19.8 24.9 80 ----- ----- Basin wide percent of average 63 80 ----------------------------------------------------------------------------- -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.