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 MONDAY: APRIL 28 , 2003 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 10.6 13.1 81 23.6 24.1 98 COTTONWOOD CREEK 7600 16.3 20.6 79 26.3 31.5 83 GRANITE CREEK 6770 6.8 13.6 50 17.9 22.2 81 GRASSY LAKE 7265 29.0 34.1 85 36.3 40.4 90 GROS VENTRE SUMMIT 8775 11.2 13.5 83 12.6 15.1 83 LEWIS LAKE DIVIDE 7860 31.4 35.0 90 32.4 41.2 79 PHILLIPS BENCH 8200 -M 29.6 * -M 32.7 * SALT RIVER SUMMIT 7600 5.8 11.3 51 15.1 21.3 71 SNAKE RIVER STATION 6920 -M 13.2 * -M 25.2 * SPRING CREEK DIVIDE 9000 24.8 28.6 87 24.8 29.9 83 THUMB DIVIDE 7980 10.9 15.6 70 18.7 21.7 86 TOGWOTEE PASS 9580 24.7 27.7 89 25.7 28.6 90 TWO OCEAN PLATEAU 9360 35.1 31.6 111 28.7 31.7 91 WILLOW CREEK 8450 24.0 30.8 78 36.8 37.2 99 ----- ----- Basin wide percent of average 84 87 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 28.3 25.8 110 24.9 23.2 107 BLACK BEAR 8170 37.1 40.1 93 35.1 45.3 77 CANYON 8090 11.9 11.8 101 16.6 17.5 95 FISHER CREEK 9100 38.4 37.6 102 37.1 41.4 90 MADISON PLATEAU 7750 20.3 24.6 83 23.8 30.1 79 NORTHEAST ENTRANCE 7350 4.9 7.8 63 14.9 14.6 102 PARKER PEAK 9400 27.5 24.3 113 22.5 19.2 117 SYLVAN LAKE 8420 -M 23.9 * -M 24.3 * THUMB DIVIDE 7980 10.9 15.6 70 18.7 21.7 86 TWO OCEAN PLATEAU 9360 35.1 31.6 111 28.7 31.7 91 WHISKEY CREEK 6800 10.6 15.7 68 18.5 23.9 77 WHITE MILL 8700 28.8 26.3 110 25.6 30.8 83 WOLVERINE 7650 5.0 7.9 63 13.4 15.0 89 ----- ----- Basin wide percent of average 96 89 WIND RIVER BURROUGHS CREEK 8750 16.4 13.9 118 20.1 19.0 106 COLD SPRINGS 9630 1.6 5.2 31 11.3 13.6 83 DEER PARK 9700 13.8 18.3 75 19.6 26.5 74 HOBBS PARK 10100 12.9 17.8 72 14.8 16.5 90 LITTLE WARM 9370 6.3 11.4 55 12.2 16.5 74 SOUTH PASS 9040 10.6 17.9 59 15.6 22.3 70 ST. LAWRENCE ALT 8620 1.7 6.3 27 9.6 11.8 81 TOGWOTEE PASS 9580 24.7 27.7 89 25.7 28.6 90 TOWNSEND CREEK 8700 5.8 9.2 63 13.4 15.1 89 ----- ----- Basin wide percent of average 73 84 BIGHORN BASIN BALD MTN. 9380 18.5 23.3 79 18.4 20.9 88 BEAR TRAP MEADOW 8200 .1 2.9 3 9.0 10.6 85 BLACKWATER 9780 27.4 28.4 96 24.0 24.3 99 BONE SPRINGS DIV 9350 16.7 18.2 92 18.1 17.9 101 EVENING STAR 9200 30.9 33.1 93 34.3 29.5 116 GRAVE SPRINGS 8550 4.0 11.0 36 8.7 12.8 68 KIRWIN 9550 12.5 12.9 97 13.9 13.9 100 MARQUETTE 8760 12.3 11.2 110 15.1 13.3 114 MIDDLE POWDER 7760 6.6 14.2 46 8.2 15.5 53 OWL CREEK 8975 .3 4.2 7 6.9 8.0 86 POWDER RIVER PASS 9480 8.1 10.9 74 13.7 15.5 88 SHELL CREEK 9580 15.7 16.7 94 15.9 16.5 96 SYLVAN LAKE 8420 -M 23.9 * -M 24.3 * SYLVAN ROAD 7120 9.3 8.8 106 19.0 20.2 94 TIMBER CREEK 7950 3.3 5.0 66 8.9 10.2 87 YOUNTS PEAK 8350 16.4 18.1 91 17.5 18.6 94 ----- ----- Basin wide percent of average 83 94 SHOSHONE RIVER BLACKWATER 9780 27.4 28.4 96 24.0 24.3 99 EVENING STAR 9200 30.9 33.1 93 34.3 29.5 116 KIRWIN 9550 12.5 12.9 97 13.9 13.9 100 MARQUETTE 8760 12.3 11.2 110 15.1 13.3 114 SYLVAN LAKE 8420 -M 23.9 * -M 24.3 * SYLVAN ROAD 7120 9.3 8.8 106 19.0 20.2 94 YOUNTS PEAK 8350 16.4 18.1 91 17.5 18.6 94 ----- ----- Basin wide percent of average 97 103 POWDER-TONGUE BEAR TRAP MEADOW 8200 .1 2.9 3 9.0 10.6 85 BIG GOOSE 7990 9.8 11.8 83 15.1 12.5 121 BONE SPRINGS DIV 9350 16.7 18.2 92 18.1 17.9 101 BURGESS JUNCTION 7880 12.2 13.3 92 15.5 15.1 103 CLOUD PEAK RESERVOIR 9860 15.1 16.0 94 16.1 16.7 96 DOME LAKE 8880 10.8 13.6 79 17.1 16.4 104 GRAVE SPRINGS 8550 4.0 11.0 36 8.7 12.8 68 HANSEN SAWMILL 8360 1.7 5.1 33 11.3 10.7 106 MIDDLE POWDER 7760 6.6 14.2 46 8.2 15.5 53 POWDER RIVER PASS 9480 8.1 10.9 74 13.7 15.5 88 SUCKER CREEK 8880 13.3 13.2 101 18.4 17.0 108 TIE CREEK 6870 2.1 4.2 50 15.1 13.1 115 ----- ----- Basin wide percent of average 75 96 BELLE FOURCHE BLIND PARK 6890 .0 4.7 0 11.4 13.9 82 COLE CANYON 5910 .0 -M * 7.7 -M * NORTH RAPID CREEK 6130 .0 4.7 0 9.3 11.1 84 ----- ----- Basin wide percent of average 0 83 UPPER N. PLATTE RIVER COLUMBINE 9400 19.7 21.6 91 28.5 28.8 99 DIVIDE PEAK 8800 20.3 19.6 104 24.6 23.9 103 ELK RIVER 8700 14.7 15.9 92 23.0 22.7 101 JOE WRIGHT 10120 30.2 24.8 122 35.1 29.6 119 NORTH FRENCH CREEK 10100 35.2 34.1 103 34.6 29.2 118 OLD BATTLE 10000 34.0 36.5 93 38.0 39.4 96 SAGE CREEK BASIN 7850 .2 11.4 2 14.4 13.9 104 SOUTH BRUSH CREEK 8400 11.4 11.5 99 21.7 19.7 110 TOWER 10500 49.8 51.7 96 49.6 44.5 111 WEBBER SPRINGS 9200 18.6 25.3 74 28.5 30.7 93 WILLOW CREEK PASS 9540 21.2 14.1 150 19.3 15.4 125 ----- ----- Basin wide percent of average 96 107 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 19.1 27.9 68 24.5 26.5 92 CASPER MTN. 7900 12.3 17.0 72 14.3 19.0 75 DEADMAN HILL 10220 19.5 19.4 101 23.3 20.6 113 DEER PARK 9700 13.8 18.3 75 19.6 26.5 74 LAPRELE CREEK 8320 6.7 7.7 87 14.7 16.1 91 RENO HILL 8400 13.8 14.9 93 18.0 19.7 91 ROACH 9700 18.4 18.5 99 23.2 22.0 105 SAND LAKE 10080 30.8 36.6 84 27.0 28.8 94 SOUTH PASS 9040 10.6 17.9 59 15.6 22.3 70 WINDY PEAK 7840 9.0 5.5 164 15.2 13.2 115 ----- ----- Basin wide percent of average 84 91 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .1 5.4 2 18.4 18.3 101 DIVIDE PEAK 8800 20.3 19.6 104 24.6 23.9 103 OLD BATTLE 10000 34.0 36.5 93 38.0 39.4 96 SANDSTONE RS 8150 7.3 10.2 72 21.7 21.6 100 WHISKEY PARK 8950 29.5 30.5 97 31.5 33.3 95 ----- ----- Basin wide percent of average 89 98 UPPER GREEN RIVER BIG SANDY OPENING 9100 9.8 13.8 71 12.5 15.7 80 BLIND BULL SUM 8650 22.9 28.1 81 18.3 24.9 73 EAST RIM DIVIDE 7930 8.1 13.3 61 10.9 13.7 80 ELKHART PARK G.S. 9400 -M 13.0 * -M 15.7 * GROS VENTRE SUMMIT 8775 11.2 13.5 83 12.6 15.1 83 KENDALL R.S. 7740 5.0 10.7 47 13.8 16.4 84 LOOMIS PARK 8240 10.3 14.8 70 17.2 19.7 87 NEW FORK LAKE 8340 6.0 8.9 67 -M 13.2 * SNIDER BASIN 8250 7.8 13.0 60 13.8 18.3 75 SPRING CREEK DIVIDE 9000 24.8 28.6 87 24.8 29.9 83 TRIPLE PEAK 8500 17.2 24.1 71 27.9 28.2 99 ----- ----- Basin wide percent of average 73 83 LOWER GREEN RIVER HAMS FORK 7840 1.1 6.8 16 11.6 14.5 80 HEWINTA 9500 4.7 9.9 47 13.7 17.5 78 HICKERSON PARK 9150 .5 6.2 8 9.5 10.0 95 HOLE-IN-ROCK 9150 3.3 5.2 63 10.4 9.5 109 INDIAN CREEK 9425 21.7 28.5 76 21.0 29.1 72 KELLEY R.S. 8180 9.5 14.7 65 15.6 23.3 67 STEEL CREEK PARK 10100 15.5 18.4 84 15.6 19.8 79 ----- ----- Basin wide percent of average 63 79 UPPER BEAR RIVER BUG LAKE 7950 11.4 18.7 61 17.3 22.1 78 HAYDEN FORK 9400 5.0 13.7 36 20.1 24.7 81 KELLEY R.S. 8180 9.5 14.7 65 15.6 23.3 67 LILY LAKE 9050 4.1 11.7 35 16.5 20.8 79 MONTE CRISTO 8960 10.9 28.7 38 23.1 29.8 78 SALT RIVER SUMMIT 7600 5.8 11.3 51 15.1 21.3 71 TRIAL LAKE 9960 12.6 26.5 48 19.0 29.0 66 ----- ----- Basin wide percent of average 47 74 ----------------------------------------------------------------------------- -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.