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 SATURDAY: APRIL 21 , 2007 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 7.0 15.1 46 20.5 23.5 87 COTTONWOOD CREEK 7600 17.1 22.3 77 24.4 30.5 80 GRANITE CREEK 6770 7.8 15.4 51 16.3 21.6 75 GRASSY LAKE 7265 23.7 35.6 67 35.2 39.4 89 GROS VENTRE SUMMIT 8750 10.9 14.1 77 13.0 14.5 90 LEWIS LAKE DIVIDE 7850 22.6 35.9 63 31.6 40.1 79 PHILLIPS BENCH 8200 17.8 30.1 59 24.0 31.9 75 SALT RIVER SUMMIT 7600 8.9 13.0 68 15.4 20.7 74 SNAKE RIVER STATION 6920 5.8 15.5 37 22.7 24.5 93 SPRING CREEK DIVIDE 9000 21.9 28.5 77 21.9 29.1 75 THUMB DIVIDE 7980 9.7 17.3 56 16.2 21.0 77 TOGWOTEE PASS 9580 19.2 27.1 71 22.0 27.6 80 TWO OCEAN PLATEAU 9240 27.9 31.1 90 24.5 30.7 80 WILLOW CREEK 8450 22.0 31.4 70 32.5 36.0 90 ----- ----- Basin wide percent of average 67 82 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 21.6 25.6 84 20.9 22.4 93 BLACK BEAR 8170 31.6 40.5 78 36.1 44.2 82 CANYON 8090 11.9 12.9 92 16.9 17.0 99 FISHER CREEK 9100 32.6 37.3 87 32.7 40.2 81 MADISON PLATEAU 7750 17.6 25.4 69 23.5 29.3 80 NORTHEAST ENTRANCE 7350 1.0 9.3 11 14.3 14.1 101 PARKER PEAK 9400 22.1 23.8 93 20.1 18.5 109 SYLVAN LAKE 8420 15.4 24.1 64 23.6 23.5 100 THUMB DIVIDE 7980 9.7 17.3 56 16.2 21.0 77 TWO OCEAN PLATEAU 9240 27.9 31.1 90 24.5 30.7 80 WHISKEY CREEK 6800 10.6 16.8 63 18.6 23.2 80 WHITE MILL 8700 21.3 26.1 82 22.0 29.9 74 WOLVERINE 7650 1.6 9.6 17 12.4 14.4 86 ----- ----- Basin wide percent of average 75 86 WIND RIVER BURROUGHS CREEK 8750 12.5 14.5 86 14.5 18.3 79 COLD SPRINGS 9630 1.3 6.2 21 9.7 12.8 76 DEER PARK 9700 12.7 17.7 72 16.9 25.4 67 HOBBS PARK 10100 13.2 17.2 77 13.7 15.6 88 LITTLE WARM 9370 8.7 12.0 72 11.3 15.7 72 SOUTH PASS 9040 11.8 17.8 66 14.6 21.3 69 ST. LAWRENCE ALT 8620 2.7 6.8 40 9.4 11.0 85 TOGWOTEE PASS 9580 19.2 27.1 71 22.0 27.6 80 TOWNSEND CREEK 8700 6.7 9.5 71 11.7 14.2 82 ----- ----- Basin wide percent of average 69 76 BIGHORN BASIN BALD MTN. 9380 22.1 22.5 98 17.0 20.0 85 BEAR TRAP MEADOW 8200 4.2 3.9 108 10.7 10.0 107 BLACKWATER 9780 21.9 27.6 79 21.0 23.4 90 BONE SPRINGS DIV 9350 19.0 17.9 106 18.1 17.1 106 EVENING STAR 9200 22.7 32.5 70 28.5 28.4 100 GRAVE SPRINGS 8550 7.9 10.8 73 8.9 12.0 74 KIRWIN 9550 11.2 12.6 89 13.2 13.2 100 MARQUETTE 8760 3.4 10.9 31 10.7 12.4 86 MIDDLE POWDER 7760 13.2 14.1 94 10.8 14.7 73 OWL CREEK 8975 1.3 4.8 27 7.7 7.4 104 POWDER RIVER PASS 9480 10.2 11.4 89 13.7 14.7 93 SHELL CREEK 9580 17.1 16.4 104 14.1 15.7 90 SYLVAN LAKE 8420 15.4 24.1 64 23.6 23.5 100 SYLVAN ROAD 7120 4.4 10.6 42 17.1 19.6 87 TIMBER CREEK 7950 3.6 5.4 67 9.7 9.5 102 YOUNTS PEAK 8350 11.1 18.1 61 14.6 18.0 81 ----- ----- Basin wide percent of average 77 92 SHOSHONE RIVER BLACKWATER 9780 21.9 27.6 79 21.0 23.4 90 EVENING STAR 9200 22.7 32.5 70 28.5 28.4 100 KIRWIN 9550 11.2 12.6 89 13.2 13.2 100 MARQUETTE 8760 3.4 10.9 31 10.7 12.4 86 SYLVAN LAKE 8420 15.4 24.1 64 23.6 23.5 100 SYLVAN ROAD 7120 4.4 10.6 42 17.1 19.6 87 YOUNTS PEAK 8350 11.1 18.1 61 14.6 18.0 81 ----- ----- Basin wide percent of average 66 93 POWDER-TONGUE BEAR TRAP MEADOW 8200 4.2 3.9 108 10.7 10.0 107 BIG GOOSE 7990 10.1 12.1 83 13.0 11.4 114 BONE SPRINGS DIV 9350 19.0 17.9 106 18.1 17.1 106 BURGESS JUNCTION 7880 13.5 13.2 102 14.9 14.3 104 CLOUD PEAK RESERVOIR 9860 15.7 15.6 101 14.7 15.7 94 DOME LAKE 8880 12.8 13.8 93 15.7 15.6 101 GRAVE SPRINGS 8550 7.9 10.8 73 8.9 12.0 74 HANSEN SAWMILL 8360 4.5 5.7 79 10.3 10.1 102 MIDDLE POWDER 7760 13.2 14.1 94 10.8 14.7 73 POWDER RIVER PASS 9480 10.2 11.4 89 13.7 14.7 93 SUCKER CREEK 8880 14.4 13.3 108 17.2 16.1 107 TIE CREEK 6870 2.2 4.8 46 13.0 12.3 106 ----- ----- Basin wide percent of average 93 98 BELLE FOURCHE BLIND PARK 6890 .0 6.2 0 10.8 13.2 82 COLE CANYON 5910 .5 5.6 9 10.1 -M * NORTH RAPID CREEK 6130 2.4 6.9 35 9.4 10.5 90 ----- ----- Basin wide percent of average 16 85 UPPER N. PLATTE RIVER COLUMBINE 9160 11.4 23.3 49 23.0 27.9 82 DIVIDE PEAK 8860 16.4 20.3 81 20.9 23.1 90 ELK RIVER 8700 7.6 17.9 42 19.0 21.9 87 JOE WRIGHT 10120 22.2 24.2 92 24.8 28.4 87 NORTH FRENCH CREEK 10130 26.5 33.3 80 25.8 28.1 92 OLD BATTLE 9920 25.7 35.5 72 30.1 38.2 79 SAGE CREEK BASIN 7850 .3 11.8 3 13.3 13.4 99 SOUTH BRUSH CREEK 8440 4.6 12.5 37 15.1 18.9 80 TOWER 10500 32.2 50.5 64 35.1 42.9 82 WEBBER SPRINGS 9250 16.1 25.7 63 24.6 29.7 83 WILLOW CREEK PASS 9540 16.0 13.8 116 14.5 14.8 98 ----- ----- Basin wide percent of average 67 86 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10220 21.1 27.1 78 21.2 25.4 83 CASPER MTN. 7850 11.5 16.9 68 13.8 17.8 78 DEADMAN HILL 10220 14.0 18.8 74 19.7 19.7 100 DEER PARK 9700 12.7 17.7 72 16.9 25.4 67 LAPRELE CREEK 8375 4.5 9.0 50 11.3 15.2 74 RENO HILL 8500 13.1 15.4 85 16.8 18.5 91 ROACH 9700 17.8 18.4 97 20.5 21.2 97 SAND LAKE 10050 27.4 35.8 77 26.6 27.6 96 SOUTH PASS 9040 11.8 17.8 66 14.6 21.3 69 WINDY PEAK 7900 4.5 6.8 66 10.8 12.5 86 ----- ----- Basin wide percent of average 75 84 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .1 7.2 1 14.1 17.7 80 DIVIDE PEAK 8860 16.4 20.3 81 20.9 23.1 90 OLD BATTLE 9920 25.7 35.5 72 30.1 38.2 79 SANDSTONE RS 8150 3.6 11.9 30 16.1 20.9 77 WHISKEY PARK 8950 18.8 30.6 61 25.3 32.1 79 ----- ----- Basin wide percent of average 61 81 UPPER GREEN RIVER BIG SANDY OPENING 9080 10.5 14.6 72 11.7 15.1 77 BLIND BULL SUM 8900 23.6 28.5 83 18.4 24.3 76 EAST RIM DIVIDE 7930 1.6 13.7 12 10.1 13.3 76 ELKHART PARK G.S. 9400 11.1 13.6 82 13.1 15.1 87 GROS VENTRE SUMMIT 8750 10.9 14.1 77 13.0 14.5 90 KENDALL R.S. 7740 4.8 12.2 39 13.2 16.0 82 LOOMIS PARK 8240 7.2 16.1 45 15.4 19.1 81 NEW FORK LAKE 8340 7.1 10.2 70 9.7 12.7 76 SNIDER BASIN 8060 9.8 14.0 70 12.8 17.8 72 SPRING CREEK DIVIDE 9000 21.9 28.5 77 21.9 29.1 75 TRIPLE PEAK 8500 19.2 25.1 76 24.9 27.4 91 ----- ----- Basin wide percent of average 67 80 LOWER GREEN RIVER HAMS FORK 7840 2.5 8.5 29 10.9 13.9 78 HEWINTA 9500 1.7 11.2 15 13.8 16.8 82 HICKERSON PARK 9100 3.5 7.3 48 11.3 9.5 119 HOLE-IN-ROCK 9150 4.0 6.3 63 10.4 9.0 116 INDIAN CREEK 9425 19.2 29.1 66 19.2 28.2 68 KELLEY R.S. 8180 11.7 16.0 73 16.8 22.6 74 STEEL CREEK PARK 10100 14.2 17.8 80 14.6 18.9 77 ----- ----- Basin wide percent of average 59 82 UPPER BEAR RIVER BUG LAKE 7950 12.3 20.3 61 16.2 21.4 76 HAYDEN FORK 9100 .4 15.2 3 20.8 23.8 87 KELLEY R.S. 8180 11.7 16.0 73 16.8 22.6 74 LILY LAKE 9050 6.3 13.2 48 15.5 19.9 78 MONTE CRISTO 8960 18.0 29.7 61 23.1 28.8 80 SALT RIVER SUMMIT 7600 8.9 13.0 68 15.4 20.7 74 TRIAL LAKE 9960 16.3 26.4 62 21.7 28.0 78 ----- ----- Basin wide percent of average 55 78 ----------------------------------------------------------------------------- -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.