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: APRIL 24 , 2007 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 6.3 14.3 44 20.8 23.8 87 COTTONWOOD CREEK 7600 17.1 21.6 79 24.9 30.9 81 GRANITE CREEK 6770 6.8 14.6 47 16.4 21.9 75 GRASSY LAKE 7265 24.4 35.0 70 36.0 39.9 90 GROS VENTRE SUMMIT 8750 10.9 13.9 78 13.2 14.8 89 LEWIS LAKE DIVIDE 7850 22.7 35.5 64 32.1 40.6 79 PHILLIPS BENCH 8200 18.3 29.9 61 24.6 32.2 76 SALT RIVER SUMMIT 7600 8.7 12.3 71 15.7 21.0 75 SNAKE RIVER STATION 6920 5.4 14.5 37 23.3 24.8 94 SPRING CREEK DIVIDE 9000 22.4 28.6 78 22.4 29.4 76 THUMB DIVIDE 7980 9.7 16.6 58 17.0 21.3 80 TOGWOTEE PASS 9580 19.8 27.4 72 22.6 28.0 81 TWO OCEAN PLATEAU 9240 28.5 31.3 91 25.0 31.1 80 WILLOW CREEK 8450 22.5 31.2 72 33.1 36.5 91 ----- ----- Basin wide percent of average 68 83 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 22.0 25.7 86 21.3 22.8 93 BLACK BEAR 8170 32.2 40.3 80 36.9 44.7 83 CANYON 8090 12.0 12.4 97 17.3 17.2 101 FISHER CREEK 9100 33.2 37.4 89 33.3 40.7 82 MADISON PLATEAU 7750 18.2 25.0 73 24.2 29.6 82 NORTHEAST ENTRANCE 7350 .0 8.7 0 14.6 14.3 102 PARKER PEAK 9400 22.6 24.0 94 20.7 18.8 110 SYLVAN LAKE 8420 16.2 24.0 68 24.4 23.9 102 THUMB DIVIDE 7980 9.7 16.6 58 17.0 21.3 80 TWO OCEAN PLATEAU 9240 28.5 31.3 91 25.0 31.1 80 WHISKEY CREEK 6800 10.7 16.3 66 19.0 23.5 81 WHITE MILL 8700 21.7 26.2 83 22.5 30.3 74 WOLVERINE 7650 .0 8.9 0 12.7 14.7 86 ----- ----- Basin wide percent of average 76 87 WIND RIVER BURROUGHS CREEK 8750 12.9 14.3 90 15.0 18.6 81 COLD SPRINGS 9630 1.0 5.8 17 10.1 13.2 77 DEER PARK 9700 12.9 17.9 72 17.3 25.9 67 HOBBS PARK 10100 13.9 17.5 79 14.5 16.0 91 LITTLE WARM 9370 8.9 11.7 76 11.6 16.0 72 SOUTH PASS 9040 11.8 17.9 66 14.9 21.7 69 ST. LAWRENCE ALT 8620 2.9 6.6 44 10.2 11.4 89 TOGWOTEE PASS 9580 19.8 27.4 72 22.6 28.0 81 TOWNSEND CREEK 8700 6.5 9.4 69 11.9 14.6 82 ----- ----- Basin wide percent of average 71 77 BIGHORN BASIN BALD MTN. 9380 22.6 22.9 99 17.6 20.4 86 BEAR TRAP MEADOW 8200 4.1 3.5 117 11.1 10.3 108 BLACKWATER 9780 23.0 28.0 82 22.0 23.8 92 BONE SPRINGS DIV 9350 19.6 18.0 109 18.7 17.5 107 EVENING STAR 9200 23.4 32.7 72 29.4 28.9 102 GRAVE SPRINGS 8550 7.9 10.9 72 9.2 12.3 75 KIRWIN 9550 11.8 12.7 93 14.0 13.5 104 MARQUETTE 8760 5.0 11.0 45 12.1 12.8 95 MIDDLE POWDER 7760 13.0 14.2 92 10.9 15.0 73 OWL CREEK 8975 2.0 4.5 44 8.3 7.7 108 POWDER RIVER PASS 9480 10.2 11.2 91 14.2 15.0 95 SHELL CREEK 9580 17.6 16.5 107 14.6 16.0 91 SYLVAN LAKE 8420 16.2 24.0 68 24.4 23.9 102 SYLVAN ROAD 7120 4.6 9.8 47 17.7 19.9 89 TIMBER CREEK 7950 4.0 5.2 77 10.2 9.8 104 YOUNTS PEAK 8350 11.6 18.1 64 14.9 18.2 82 ----- ----- Basin wide percent of average 81 94 SHOSHONE RIVER BLACKWATER 9780 23.0 28.0 82 22.0 23.8 92 EVENING STAR 9200 23.4 32.7 72 29.4 28.9 102 KIRWIN 9550 11.8 12.7 93 14.0 13.5 104 MARQUETTE 8760 5.0 11.0 45 12.1 12.8 95 SYLVAN LAKE 8420 16.2 24.0 68 24.4 23.9 102 SYLVAN ROAD 7120 4.6 9.8 47 17.7 19.9 89 YOUNTS PEAK 8350 11.6 18.1 64 14.9 18.2 82 ----- ----- Basin wide percent of average 70 95 POWDER-TONGUE BEAR TRAP MEADOW 8200 4.1 3.5 117 11.1 10.3 108 BIG GOOSE 7990 10.1 11.9 85 13.2 11.9 111 BONE SPRINGS DIV 9350 19.6 18.0 109 18.7 17.5 107 BURGESS JUNCTION 7880 13.8 13.3 104 15.3 14.7 104 CLOUD PEAK RESERVOIR 9860 16.3 15.8 103 15.4 16.1 96 DOME LAKE 8880 13.4 13.7 98 16.4 16.0 102 GRAVE SPRINGS 8550 7.9 10.9 72 9.2 12.3 75 HANSEN SAWMILL 8360 4.8 5.5 87 10.8 10.3 105 MIDDLE POWDER 7760 13.0 14.2 92 10.9 15.0 73 POWDER RIVER PASS 9480 10.2 11.2 91 14.2 15.0 95 SUCKER CREEK 8880 14.7 13.3 111 17.8 16.5 108 TIE CREEK 6870 2.1 4.5 47 13.4 12.7 106 ----- ----- Basin wide percent of average 96 99 BELLE FOURCHE BLIND PARK 6890 .3 5.6 5 11.2 13.5 83 COLE CANYON 5910 .0 5.5 0 10.3 -M * NORTH RAPID CREEK 6130 1.6 6.0 27 9.8 10.7 92 ----- ----- Basin wide percent of average 11 87 UPPER N. PLATTE RIVER COLUMBINE 9160 10.2 22.6 45 23.4 28.3 83 DIVIDE PEAK 8860 15.6 20.0 78 21.1 23.5 90 ELK RIVER 8700 7.2 17.0 42 19.4 22.2 87 JOE WRIGHT 10120 22.7 24.4 93 25.1 28.9 87 NORTH FRENCH CREEK 10130 27.6 33.7 82 27.1 28.6 95 OLD BATTLE 9920 26.1 35.9 73 30.5 38.7 79 SAGE CREEK BASIN 7850 .1 11.6 1 13.5 13.6 99 SOUTH BRUSH CREEK 8440 4.7 12.1 39 15.6 19.2 81 TOWER 10500 32.8 51.0 64 35.6 43.6 82 WEBBER SPRINGS 9250 15.6 25.5 61 24.8 30.1 82 WILLOW CREEK PASS 9540 16.5 13.9 119 14.9 15.0 99 ----- ----- Basin wide percent of average 67 86 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10220 22.1 27.5 80 22.5 25.9 87 CASPER MTN. 7850 11.0 17.0 65 14.2 18.3 78 DEADMAN HILL 10220 13.7 19.1 72 20.1 20.1 100 DEER PARK 9700 12.9 17.9 72 17.3 25.9 67 LAPRELE CREEK 8375 4.5 8.5 53 12.0 15.6 77 RENO HILL 8500 13.4 15.2 88 17.6 19.0 93 ROACH 9700 18.4 18.5 99 21.5 21.5 100 SAND LAKE 10050 28.3 36.1 78 27.9 28.1 99 SOUTH PASS 9040 11.8 17.9 66 14.9 21.7 69 WINDY PEAK 7900 4.2 6.3 67 11.6 12.8 91 ----- ----- Basin wide percent of average 76 86 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .1 6.4 2 14.4 18.0 80 DIVIDE PEAK 8860 15.6 20.0 78 21.1 23.5 90 OLD BATTLE 9920 26.1 35.9 73 30.5 38.7 79 SANDSTONE RS 8150 2.7 11.2 24 16.6 21.2 78 WHISKEY PARK 8950 19.0 30.6 62 25.9 32.6 79 ----- ----- Basin wide percent of average 61 81 UPPER GREEN RIVER BIG SANDY OPENING 9080 10.5 14.3 73 11.8 15.3 77 BLIND BULL SUM 8900 24.2 28.3 86 19.0 24.6 77 EAST RIM DIVIDE 7930 1.3 13.5 10 10.4 13.5 77 ELKHART PARK G.S. 9400 11.7 13.3 88 13.7 15.4 89 GROS VENTRE SUMMIT 8750 10.9 13.9 78 13.2 14.8 89 KENDALL R.S. 7740 4.5 11.6 39 13.3 16.2 82 LOOMIS PARK 8240 6.8 15.5 44 15.7 19.4 81 NEW FORK LAKE 8340 7.1 9.7 73 10.0 12.9 78 SNIDER BASIN 8060 9.7 13.6 71 13.1 18.0 73 SPRING CREEK DIVIDE 9000 22.4 28.6 78 22.4 29.4 76 TRIPLE PEAK 8500 19.7 24.7 80 25.5 27.8 92 ----- ----- Basin wide percent of average 69 81 LOWER GREEN RIVER HAMS FORK 7840 1.2 7.8 15 11.2 14.1 79 HEWINTA 9500 1.3 10.6 12 14.3 17.1 84 HICKERSON PARK 9100 4.2 6.8 62 11.9 9.7 123 HOLE-IN-ROCK 9150 4.0 5.8 69 10.7 9.2 116 INDIAN CREEK 9425 19.6 28.9 68 19.6 28.6 69 KELLEY R.S. 8180 11.6 15.5 75 17.2 22.9 75 STEEL CREEK PARK 10100 14.6 18.0 81 14.8 19.3 77 ----- ----- Basin wide percent of average 60 82 UPPER BEAR RIVER BUG LAKE 7950 12.1 19.6 62 16.5 21.7 76 HAYDEN FORK 9100 .2 14.5 1 21.2 24.2 88 KELLEY R.S. 8180 11.6 15.5 75 17.2 22.9 75 LILY LAKE 9050 6.3 12.6 50 15.8 20.3 78 MONTE CRISTO 8960 18.3 29.3 62 23.5 29.2 80 SALT RIVER SUMMIT 7600 8.7 12.3 71 15.7 21.0 75 TRIAL LAKE 9960 16.7 26.5 63 22.0 28.4 77 ----- ----- Basin wide percent of average 57 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.