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 THURSDAY: APRIL 12 , 2007 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 9.4 17.1 55 19.9 22.7 88 COTTONWOOD CREEK 7600 18.8 23.9 79 23.7 29.3 81 GRANITE CREEK 6770 9.9 17.3 57 16.1 20.9 77 GRASSY LAKE 7265 25.4 36.8 69 33.9 38.0 89 GROS VENTRE SUMMIT 8750 9.8 14.6 67 12.2 13.8 88 LEWIS LAKE DIVIDE 7850 23.6 36.5 65 30.5 38.8 79 PHILLIPS BENCH 8200 18.8 30.3 62 23.5 30.8 76 SALT RIVER SUMMIT 7600 10.0 14.4 69 14.7 20.0 74 SNAKE RIVER STATION 6920 9.9 17.9 55 22.5 23.6 95 SPRING CREEK DIVIDE 9000 21.2 28.2 75 21.1 28.0 75 THUMB DIVIDE 7980 12.0 18.8 64 15.7 20.2 78 TOGWOTEE PASS 9580 18.2 26.4 69 20.7 26.4 78 TWO OCEAN PLATEAU 9240 25.9 30.1 86 23.4 29.5 79 WILLOW CREEK 8450 22.9 31.6 72 31.1 34.5 90 ----- ----- Basin wide percent of average 69 82 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 20.5 25.1 82 19.7 21.5 92 BLACK BEAR 8170 31.9 40.7 78 34.7 42.7 81 CANYON 8090 12.2 13.9 88 16.0 16.4 98 FISHER CREEK 9100 31.1 36.7 85 31.3 38.7 81 MADISON PLATEAU 7750 17.7 26.0 68 22.4 28.3 79 NORTHEAST ENTRANCE 7350 3.8 10.8 35 13.5 13.5 100 PARKER PEAK 9400 21.0 23.1 91 18.7 17.5 107 SYLVAN LAKE 8420 15.5 23.9 65 22.0 22.4 98 THUMB DIVIDE 7980 12.0 18.8 64 15.7 20.2 78 TWO OCEAN PLATEAU 9240 25.9 30.1 86 23.4 29.5 79 WHISKEY CREEK 6800 10.8 17.7 61 17.5 22.3 78 WHITE MILL 8700 20.4 25.7 79 21.0 28.7 73 WOLVERINE 7650 4.2 11.1 38 11.5 13.7 84 ----- ----- Basin wide percent of average 75 85 WIND RIVER BURROUGHS CREEK 8750 12.0 15.0 80 14.0 17.5 80 COLD SPRINGS 9630 2.8 7.5 37 9.6 11.9 81 DEER PARK 9700 12.8 17.1 75 16.5 23.9 69 HOBBS PARK 10100 13.3 16.4 81 13.3 14.4 92 LITTLE WARM 9370 8.6 12.4 69 10.4 14.7 71 SOUTH PASS 9040 12.7 17.5 73 14.4 20.1 72 ST. LAWRENCE ALT 8620 4.0 7.3 55 9.3 10.1 92 TOGWOTEE PASS 9580 18.2 26.4 69 20.7 26.4 78 TOWNSEND CREEK 8700 7.5 9.6 78 11.5 13.1 88 ----- ----- Basin wide percent of average 71 79 BIGHORN BASIN BALD MTN. 9380 21.2 21.5 99 15.9 18.9 84 BEAR TRAP MEADOW 8200 5.1 4.8 106 9.9 9.3 106 BLACKWATER 9780 20.9 26.4 79 19.8 22.2 89 BONE SPRINGS DIV 9350 18.7 17.4 107 17.1 16.0 107 EVENING STAR 9200 22.4 31.6 71 27.2 27.1 100 GRAVE SPRINGS 8550 8.1 10.4 78 8.6 10.9 79 KIRWIN 9550 10.3 12.1 85 12.2 12.4 98 MARQUETTE 8760 2.7 10.3 26 9.5 11.2 85 MIDDLE POWDER 7760 13.2 13.5 98 10.3 13.6 76 OWL CREEK 8975 3.7 5.3 70 6.7 6.7 100 POWDER RIVER PASS 9480 10.6 11.7 91 13.0 13.6 96 SHELL CREEK 9580 16.4 15.8 104 13.3 14.6 91 SYLVAN LAKE 8420 15.5 23.9 65 22.0 22.4 98 SYLVAN ROAD 7120 6.5 12.3 53 16.4 18.8 87 TIMBER CREEK 7950 3.2 5.7 56 8.9 8.5 105 YOUNTS PEAK 8350 10.9 17.9 61 14.3 17.2 83 ----- ----- Basin wide percent of average 79 92 SHOSHONE RIVER BLACKWATER 9780 20.9 26.4 79 19.8 22.2 89 EVENING STAR 9200 22.4 31.6 71 27.2 27.1 100 KIRWIN 9550 10.3 12.1 85 12.2 12.4 98 MARQUETTE 8760 2.7 10.3 26 9.5 11.2 85 SYLVAN LAKE 8420 15.5 23.9 65 22.0 22.4 98 SYLVAN ROAD 7120 6.5 12.3 53 16.4 18.8 87 YOUNTS PEAK 8350 10.9 17.9 61 14.3 17.2 83 ----- ----- Basin wide percent of average 66 92 POWDER-TONGUE BEAR TRAP MEADOW 8200 5.1 4.8 106 9.9 9.3 106 BIG GOOSE 7990 9.9 12.0 82 12.1 10.1 120 BONE SPRINGS DIV 9350 18.7 17.4 107 17.1 16.0 107 BURGESS JUNCTION 7880 13.3 12.9 103 14.1 13.4 105 CLOUD PEAK RESERVOIR 9860 15.1 14.9 101 13.4 14.4 93 DOME LAKE 8880 13.1 13.7 96 14.8 14.5 102 GRAVE SPRINGS 8550 8.1 10.4 78 8.6 10.9 79 HANSEN SAWMILL 8360 4.2 6.3 67 8.5 9.2 92 MIDDLE POWDER 7760 13.2 13.5 98 10.3 13.6 76 POWDER RIVER PASS 9480 10.6 11.7 91 13.0 13.6 96 SUCKER CREEK 8880 14.5 13.1 111 16.4 15.0 109 TIE CREEK 6870 3.3 5.5 60 12.6 11.2 112 ----- ----- Basin wide percent of average 95 100 BELLE FOURCHE BLIND PARK 6890 1.3 7.8 17 10.6 12.2 87 COLE CANYON 5910 3.0 5.9 51 9.6 -M * NORTH RAPID CREEK 6130 4.7 8.7 54 8.7 9.6 91 ----- ----- Basin wide percent of average 40 89 UPPER N. PLATTE RIVER COLUMBINE 9160 14.8 24.8 60 22.4 26.7 84 DIVIDE PEAK 8860 17.9 20.7 86 20.3 22.1 92 ELK RIVER 8700 12.4 19.6 63 18.5 20.9 89 JOE WRIGHT 10120 22.1 23.2 95 24.5 26.8 91 NORTH FRENCH CREEK 10130 26.3 31.9 82 25.4 26.6 95 OLD BATTLE 9920 25.6 34.2 75 29.3 36.7 80 SAGE CREEK BASIN 7850 4.7 12.0 39 13.1 12.8 102 SOUTH BRUSH CREEK 8440 8.9 13.3 67 14.9 17.8 84 TOWER 10500 32.1 48.7 66 34.4 41.0 84 WEBBER SPRINGS 9250 17.9 26.2 68 24.3 28.4 86 WILLOW CREEK PASS 9540 15.4 13.3 116 14.4 13.9 104 ----- ----- Basin wide percent of average 74 88 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10220 20.7 25.9 80 20.7 23.9 87 CASPER MTN. 7850 12.5 16.3 77 13.4 16.3 82 DEADMAN HILL 10220 15.7 17.9 88 18.9 18.5 102 DEER PARK 9700 12.8 17.1 75 16.5 23.9 69 LAPRELE CREEK 8375 6.8 10.4 65 11.0 14.0 79 RENO HILL 8500 14.0 15.6 90 16.4 16.9 97 ROACH 9700 17.9 18.1 99 19.9 20.1 99 SAND LAKE 10050 27.0 34.5 78 26.2 26.1 100 SOUTH PASS 9040 12.7 17.5 73 14.4 20.1 72 WINDY PEAK 7900 6.2 8.0 78 10.4 11.7 89 ----- ----- Basin wide percent of average 81 88 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 9.2 * 13.5 16.9 80 DIVIDE PEAK 8860 17.9 20.7 86 20.3 22.1 92 OLD BATTLE 9920 25.6 34.2 75 29.3 36.7 80 SANDSTONE RS 8150 7.0 13.7 51 15.6 19.9 78 WHISKEY PARK 8950 21.3 30.6 70 25.0 30.6 82 ----- ----- Basin wide percent of average 72 82 UPPER GREEN RIVER BIG SANDY OPENING 9080 10.6 15.2 70 11.0 14.4 76 BLIND BULL SUM 8900 22.7 28.8 79 17.8 23.5 76 EAST RIM DIVIDE 7930 3.7 13.8 27 9.6 12.8 75 ELKHART PARK G.S. 9400 10.2 13.9 73 12.0 14.4 83 GROS VENTRE SUMMIT 8750 9.8 14.6 67 12.2 13.8 88 KENDALL R.S. 7740 6.7 13.8 49 12.6 15.4 82 LOOMIS PARK 8240 9.2 17.2 53 14.7 18.4 80 NEW FORK LAKE 8340 8.0 11.3 71 9.0 12.1 74 SNIDER BASIN 8060 10.3 14.9 69 12.5 17.1 73 SPRING CREEK DIVIDE 9000 21.2 28.2 75 21.1 28.0 75 TRIPLE PEAK 8500 19.7 25.8 76 24.1 26.4 91 ----- ----- Basin wide percent of average 67 80 LOWER GREEN RIVER HAMS FORK 7840 6.6 10.4 63 10.7 13.2 81 HEWINTA 9500 4.3 12.3 35 13.1 15.8 83 HICKERSON PARK 9100 3.7 8.2 45 10.7 8.8 122 HOLE-IN-ROCK 9150 5.5 7.3 75 10.0 8.3 120 INDIAN CREEK 9425 19.7 29.3 67 18.7 27.1 69 KELLEY R.S. 8180 12.9 17.2 75 16.4 21.7 76 STEEL CREEK PARK 10100 12.5 17.0 74 14.0 17.7 79 ----- ----- Basin wide percent of average 64 83 UPPER BEAR RIVER BUG LAKE 7950 13.4 21.6 62 15.9 20.6 77 HAYDEN FORK 9100 1.8 16.5 11 20.2 22.6 89 KELLEY R.S. 8180 12.9 17.2 75 16.4 21.7 76 LILY LAKE 9050 7.8 14.3 55 15.0 18.9 79 MONTE CRISTO 8960 19.3 30.5 63 22.0 27.4 80 SALT RIVER SUMMIT 7600 10.0 14.4 69 14.7 20.0 74 TRIAL LAKE 9960 16.4 26.2 63 20.7 26.7 78 ----- ----- Basin wide percent of average 58 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.