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 SUNDAY: APRIL 8 , 2007 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 9.7 17.5 55 19.7 22.3 88 COTTONWOOD CREEK 7600 18.1 24.0 75 22.9 28.8 80 GRANITE CREEK 6770 9.6 17.8 54 15.8 20.6 77 GRASSY LAKE 7265 25.5 36.5 70 33.6 37.4 90 GROS VENTRE SUMMIT 8750 10.4 14.5 72 11.8 13.5 87 LEWIS LAKE DIVIDE 7850 23.0 36.2 64 30.6 38.2 80 PHILLIPS BENCH 8200 18.3 29.9 61 23.0 30.3 76 SALT RIVER SUMMIT 7600 10.1 14.5 70 14.4 19.6 73 SNAKE RIVER STATION 6920 9.4 18.4 51 22.4 23.2 97 SPRING CREEK DIVIDE 9000 20.5 27.7 74 20.4 27.6 74 THUMB DIVIDE 7980 11.8 18.9 62 15.5 19.8 78 TOGWOTEE PASS 9580 17.3 25.9 67 20.1 25.9 78 TWO OCEAN PLATEAU 9240 25.3 29.5 86 23.0 29.0 79 WILLOW CREEK 8450 21.4 31.2 69 29.7 33.8 88 ----- ----- Basin wide percent of average 67 82 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 19.6 24.6 80 19.0 21.0 90 BLACK BEAR 8170 30.7 40.3 76 34.3 42.0 82 CANYON 8090 11.8 13.9 85 15.6 16.1 97 FISHER CREEK 9100 29.8 36.2 82 30.6 38.0 81 MADISON PLATEAU 7750 17.0 25.8 66 22.1 27.9 79 NORTHEAST ENTRANCE 7350 4.2 11.0 38 12.9 13.3 97 PARKER PEAK 9400 20.4 22.6 90 18.2 17.1 106 SYLVAN LAKE 8420 15.3 23.5 65 21.7 21.9 99 THUMB DIVIDE 7980 11.8 18.9 62 15.5 19.8 78 TWO OCEAN PLATEAU 9240 25.3 29.5 86 23.0 29.0 79 WHISKEY CREEK 6800 10.7 17.6 61 17.4 21.9 79 WHITE MILL 8700 19.6 25.3 77 20.3 28.2 72 WOLVERINE 7650 4.7 11.3 42 11.3 13.4 84 ----- ----- Basin wide percent of average 74 85 WIND RIVER BURROUGHS CREEK 8750 11.8 14.9 79 13.8 17.1 81 COLD SPRINGS 9630 2.9 8.1 36 9.5 11.4 83 DEER PARK 9700 12.6 17.1 74 16.4 23.2 71 HOBBS PARK 10100 13.2 15.9 83 13.3 13.8 96 LITTLE WARM 9370 8.3 12.2 68 10.2 14.3 71 SOUTH PASS 9040 12.9 17.2 75 14.3 19.6 73 ST. LAWRENCE ALT 8620 4.2 7.3 58 9.3 9.6 97 TOGWOTEE PASS 9580 17.3 25.9 67 20.1 25.9 78 TOWNSEND CREEK 8700 7.6 9.3 82 11.3 12.6 90 ----- ----- Basin wide percent of average 71 80 BIGHORN BASIN BALD MTN. 9380 20.2 20.9 97 15.1 18.4 82 BEAR TRAP MEADOW 8200 4.9 5.0 98 9.5 8.9 107 BLACKWATER 9780 20.6 25.9 80 19.5 21.6 90 BONE SPRINGS DIV 9350 18.2 17.0 107 16.6 15.5 107 EVENING STAR 9200 21.9 31.1 70 26.7 26.5 101 GRAVE SPRINGS 8550 7.9 10.1 78 8.3 10.5 79 KIRWIN 9550 10.2 11.9 86 12.0 12.0 100 MARQUETTE 8760 3.0 9.8 31 9.4 10.7 88 MIDDLE POWDER 7760 12.6 12.9 98 10.0 13.2 76 OWL CREEK 8975 4.3 5.4 80 6.6 6.4 103 POWDER RIVER PASS 9480 10.3 11.4 90 12.6 13.2 95 SHELL CREEK 9580 15.9 15.5 103 12.8 14.2 90 SYLVAN LAKE 8420 15.3 23.5 65 21.7 21.9 99 SYLVAN ROAD 7120 6.8 12.5 54 16.2 18.4 88 TIMBER CREEK 7950 3.2 5.8 55 9.0 8.1 111 YOUNTS PEAK 8350 10.9 17.7 62 14.0 16.9 83 ----- ----- Basin wide percent of average 79 93 SHOSHONE RIVER BLACKWATER 9780 20.6 25.9 80 19.5 21.6 90 EVENING STAR 9200 21.9 31.1 70 26.7 26.5 101 KIRWIN 9550 10.2 11.9 86 12.0 12.0 100 MARQUETTE 8760 3.0 9.8 31 9.4 10.7 88 SYLVAN LAKE 8420 15.3 23.5 65 21.7 21.9 99 SYLVAN ROAD 7120 6.8 12.5 54 16.2 18.4 88 YOUNTS PEAK 8350 10.9 17.7 62 14.0 16.9 83 ----- ----- Basin wide percent of average 67 93 POWDER-TONGUE BEAR TRAP MEADOW 8200 4.9 5.0 98 9.5 8.9 107 BIG GOOSE 7990 9.6 11.6 83 11.8 9.5 124 BONE SPRINGS DIV 9350 18.2 17.0 107 16.6 15.5 107 BURGESS JUNCTION 7880 13.1 12.4 106 13.8 12.9 107 CLOUD PEAK RESERVOIR 9860 14.6 14.4 101 12.9 13.9 93 DOME LAKE 8880 12.9 13.3 97 14.4 14.0 103 GRAVE SPRINGS 8550 7.9 10.1 78 8.3 10.5 79 HANSEN SAWMILL 8360 4.3 6.3 68 8.2 8.9 92 MIDDLE POWDER 7760 12.6 12.9 98 10.0 13.2 76 POWDER RIVER PASS 9480 10.3 11.4 90 12.6 13.2 95 SUCKER CREEK 8880 14.4 12.7 113 15.7 14.5 108 TIE CREEK 6870 3.3 5.7 58 12.3 10.7 115 ----- ----- Basin wide percent of average 95 100 BELLE FOURCHE BLIND PARK 6890 1.0 8.1 12 10.1 11.8 86 COLE CANYON 5910 2.8 6.0 47 9.4 -M * NORTH RAPID CREEK 6130 4.3 8.6 50 8.3 9.3 89 ----- ----- Basin wide percent of average 36 87 UPPER N. PLATTE RIVER COLUMBINE 9160 14.2 24.9 57 21.5 26.2 82 DIVIDE PEAK 8860 17.3 20.4 85 20.1 21.6 93 ELK RIVER 8700 11.4 19.6 58 17.8 20.5 87 JOE WRIGHT 10120 21.1 22.6 93 23.0 26.1 88 NORTH FRENCH CREEK 10130 24.9 31.1 80 24.3 25.9 94 OLD BATTLE 9920 24.2 33.5 72 28.5 36.0 79 SAGE CREEK BASIN 7850 5.5 11.8 47 12.8 12.6 102 SOUTH BRUSH CREEK 8440 9.2 13.2 70 14.7 17.3 85 TOWER 10500 30.9 47.6 65 33.4 40.1 83 WEBBER SPRINGS 9250 16.9 26.2 65 23.3 27.8 84 WILLOW CREEK PASS 9540 14.6 12.8 114 13.7 13.6 101 ----- ----- Basin wide percent of average 72 87 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10220 20.2 25.2 80 20.0 23.2 86 CASPER MTN. 7850 12.4 15.7 79 13.2 15.6 85 DEADMAN HILL 10220 14.4 17.4 83 18.1 17.9 101 DEER PARK 9700 12.6 17.1 74 16.4 23.2 71 LAPRELE CREEK 8375 6.8 10.6 64 10.9 13.5 81 RENO HILL 8500 14.0 15.1 93 16.2 16.2 100 ROACH 9700 17.3 17.8 97 19.4 19.6 99 SAND LAKE 10050 25.8 33.9 76 25.0 25.4 98 SOUTH PASS 9040 12.9 17.2 75 14.3 19.6 73 WINDY PEAK 7900 6.2 8.1 77 10.2 11.3 90 ----- ----- Basin wide percent of average 80 88 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 9.8 * 13.4 16.5 81 DIVIDE PEAK 8860 17.3 20.4 85 20.1 21.6 93 OLD BATTLE 9920 24.2 33.5 72 28.5 36.0 79 SANDSTONE RS 8150 6.9 14.1 49 15.2 19.5 78 WHISKEY PARK 8950 20.1 30.5 66 23.6 30.0 79 ----- ----- Basin wide percent of average 70 82 UPPER GREEN RIVER BIG SANDY OPENING 9080 10.9 15.0 73 11.1 14.1 79 BLIND BULL SUM 8900 21.9 28.6 77 17.4 23.1 75 EAST RIM DIVIDE 7930 4.6 13.7 34 9.6 12.6 76 ELKHART PARK G.S. 9400 9.9 13.8 72 11.9 14.0 85 GROS VENTRE SUMMIT 8750 10.4 14.5 72 11.8 13.5 87 KENDALL R.S. 7740 7.0 14.1 50 12.4 15.1 82 LOOMIS PARK 8240 8.8 17.3 51 14.3 18.1 79 NEW FORK LAKE 8340 7.7 11.3 68 9.1 11.9 76 SNIDER BASIN 8060 10.1 14.8 68 12.1 16.8 72 SPRING CREEK DIVIDE 9000 20.5 27.7 74 20.4 27.6 74 TRIPLE PEAK 8500 18.5 25.5 73 23.0 25.9 89 ----- ----- Basin wide percent of average 66 79 LOWER GREEN RIVER HAMS FORK 7840 5.9 11.0 54 10.4 12.9 81 HEWINTA 9500 3.4 12.2 28 12.6 15.4 82 HICKERSON PARK 9100 4.5 8.0 56 10.4 8.5 122 HOLE-IN-ROCK 9150 5.4 7.2 75 9.6 8.0 120 INDIAN CREEK 9425 19.0 28.9 66 18.4 26.6 69 KELLEY R.S. 8180 12.6 17.1 74 16.1 21.3 76 STEEL CREEK PARK 10100 11.8 16.6 71 13.3 17.2 77 ----- ----- Basin wide percent of average 62 83 UPPER BEAR RIVER BUG LAKE 7950 12.8 21.4 60 15.6 20.2 77 HAYDEN FORK 9100 2.2 16.6 13 19.5 22.1 88 KELLEY R.S. 8180 12.6 17.1 74 16.1 21.3 76 LILY LAKE 9050 7.8 14.0 56 14.4 18.4 78 MONTE CRISTO 8960 17.5 30.4 58 21.2 26.8 79 SALT RIVER SUMMIT 7600 10.1 14.5 70 14.4 19.6 73 TRIAL LAKE 9960 15.3 25.9 59 20.3 26.2 77 ----- ----- Basin wide percent of average 56 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.