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: MAY 4 , 1998 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 8.7 9.4 93 22.9 25.5 90 COTTONWOOD CREEK 7600 13.6 18.7 73 25.6 28.5 90 GRANITE CREEK 6770 10.7 11.7 91 22.3 27.1 82 GRASSY LAKE 7265 26.2 32.5 81 38.4 42.3 91 GROS VENTRE SUMMIT 8775 10.9 13.1 83 14.9 18.3 81 LEWIS LAKE DIVIDE 7860 27.3 33.4 82 35.3 43.0 82 PHILLIPS BENCH 8200 25.5 28.6 89 29.0 33.9 86 SALT RIVER SUMMIT 7600 8.8 8.5 104 20.5 19.4 106 SNAKE RIVER STATION 6920 -M 15.3 * -M 29.7 * SPRING CREEK DIVIDE 9000 20.4 28.8 71 24.2 31.1 78 THUMB DIVIDE 7980 -M 14.3 * -M 23.8 * TOGWOTEE PASS 9580 24.6 27.8 88 26.7 32.2 83 TWO OCEAN PLATEAU 9360 30.0 27.3 110 30.3 35.1 86 WILLOW CREEK 8450 20.7 31.0 67 35.0 36.6 96 ----- ----- Basin wide percent of average 84 87 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 18.8 25.8 73 18.3 21.6 85 BLACK BEAR 7950 38.0 39.2 97 39.9 46.9 85 CANYON 7940 8.3 10.0 83 16.3 16.6 98 FISHER CREEK 9100 28.4 38.4 74 30.9 42.7 72 MADISON PLATEAU 7750 18.9 22.8 83 25.7 30.2 85 NORTHEAST ENTRANCE 7350 .5 5.2 10 12.7 14.2 89 PARKER PEAK 9400 17.2 23.5 73 18.0 18.5 97 SYLVAN LAKE 8420 15.6 23.1 68 22.6 22.7 100 THUMB DIVIDE 7980 -M 14.3 * -M 23.8 * TWO OCEAN PLATEAU 9360 30.0 27.3 110 30.3 35.1 86 WHISKEY CREEK 6800 13.5 14.0 96 21.2 25.2 84 WHITE MILL 8700 22.5 26.0 87 23.1 33.0 70 WOLVERINE 7650 .3 7.0 4 -M 15.5 * ----- ----- Basin wide percent of average 81 84 WIND RIVER BURROUGHS CREEK 8750 15.2 11.6 131 19.4 19.7 98 COLD SPRINGS 9630 7.9 5.9 134 14.8 13.4 110 DEER PARK 9700 -M -M * 24.7 -M * HOBBS PARK 10100 18.5 17.8 104 18.2 17.6 103 LITTLE WARM 9620 9.1 9.3 98 15.9 16.6 96 SOUTH PASS 9040 15.1 17.8 85 21.2 20.9 101 ST. LAWRENCE ALT 8620 8.0 4.8 167 13.1 12.7 103 TOGWOTEE PASS 9580 24.6 27.8 88 26.7 32.2 83 TOWNSEND CREEK 8700 10.3 8.8 117 17.1 15.8 108 ----- ----- Basin wide percent of average 105 98 BIGHORN BASIN BALD MTN. 9375 21.5 24.2 89 20.4 21.2 96 BEAR TRAP MEADOW 7900 .3 3.6 8 11.8 10.9 108 BLACKWATER 9780 21.0 25.5 82 20.5 20.9 98 BONE SPRINGS DIV 9350 19.6 18.0 109 19.9 18.5 108 EVENING STAR 9200 20.8 30.7 68 27.1 26.3 103 GRAVE SPRINGS 8550 10.8 -M * 14.0 12.8 109 KIRWIN 9550 11.9 11.4 104 15.9 13.6 117 MARQUETTE 8760 13.1 8.4 156 16.6 13.9 119 MIDDLE POWDER 7760 10.9 14.6 75 13.3 15.1 88 OWL CREEK 8975 4.9 2.9 169 9.8 8.4 117 POWDER RIVER PASS 9480 10.2 9.6 106 16.1 15.0 107 SHELL CREEK 9580 13.8 17.0 81 13.8 16.3 85 SYLVAN LAKE 8420 15.6 23.1 68 22.6 22.7 100 SYLVAN ROAD 8120 2.9 7.1 41 15.2 18.9 80 TIMBER CREEK 7950 6.5 5.2 125 12.7 10.4 122 YOUNTS PEAK 8350 14.9 17.8 84 16.9 19.6 86 ----- ----- Basin wide percent of average 86 101 SHOSHONE RIVER BLACKWATER 9780 21.0 25.5 82 20.5 20.9 98 EVENING STAR 9200 20.8 30.7 68 27.1 26.3 103 KIRWIN 9550 11.9 11.4 104 15.9 13.6 117 MARQUETTE 8760 13.1 8.4 156 16.6 13.9 119 SYLVAN LAKE 8420 15.6 23.1 68 22.6 22.7 100 SYLVAN ROAD 8120 2.9 7.1 41 15.2 18.9 80 YOUNTS PEAK 8350 14.9 17.8 84 16.9 19.6 86 ----- ----- Basin wide percent of average 81 99 POWDER-TONGUE BEAR TRAP MEADOW 7900 .3 3.6 8 11.8 10.9 108 BONE SPRINGS DIV 9350 19.6 18.0 109 19.9 18.5 108 BURGESS JUNCTION 7880 11.2 13.0 86 15.2 14.7 103 CLOUD PEAK RESERVOIR 9860 15.7 17.4 90 19.9 17.5 114 DOME LAKE 8880 -M 14.0 * 16.4 16.8 98 GRAVE SPRINGS 8550 10.8 -M * 14.0 12.8 109 HANSEN SAWMILL 8760 5.5 6.3 87 13.6 10.6 128 MIDDLE POWDER 7760 10.9 14.6 75 13.3 15.1 88 POWDER RIVER PASS 9480 10.2 9.6 106 16.1 15.0 107 SUCKER CREEK 8880 10.9 13.1 83 17.0 16.9 101 TIE CREEK 6870 3.3 -M * 16.4 14.1 116 ----- ----- Basin wide percent of average 88 107 BELLE FOURCHE BLIND PARK 6890 .0 8.5 0 14.0 14.2 99 NORTH RAPID CREEK 6130 1.2 -M * 12.0 -M * WARREN PEAK 6520 5.5 8.5 65 12.6 10.6 119 ----- ----- Basin wide percent of average 32 107 UPPER N. PLATTE RIVER COLUMBINE 9400 10.6 20.4 52 25.5 28.4 90 DIVIDE PEAK 8800 14.0 17.8 79 22.3 27.6 81 ELK RIVER 8700 9.3 14.6 64 22.3 22.3 100 JOE WRIGHT 10120 21.0 24.5 86 27.5 30.7 90 NORTH FRENCH CREEK 10100 30.8 28.8 107 32.7 28.4 115 OLD BATTLE 10000 34.4 37.9 91 38.9 36.1 108 SOUTH BRUSH CREEK 8400 1.8 9.6 19 14.3 20.9 68 TOWER 10500 52.7 51.0 103 45.2 43.8 103 WEBBER SPRINGS 9200 17.4 24.8 70 28.5 30.9 92 WILLOW CREEK PASS 9540 8.9 12.9 69 9.7 15.7 62 ----- ----- Basin wide percent of average 83 94 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 22.4 28.0 80 24.7 24.1 102 CASPER MTN. 7900 8.4 16.4 51 15.1 19.2 79 DEADMAN HILL 10220 16.2 19.0 85 17.3 21.4 81 DEER PARK 9700 -M -M * 24.7 -M * LAPRELE CREEK 8320 1.0 5.7 18 12.7 15.0 85 RENO HILL 8400 7.5 12.4 60 13.6 22.6 60 ROACH 9700 14.2 17.7 80 19.6 26.2 75 SAND LAKE 10080 30.1 36.8 82 27.3 25.1 109 SOUTH PASS 9040 15.1 17.8 85 21.2 20.9 101 WINDY PEAK 7840 1.5 7.0 21 10.7 12.5 86 ----- ----- Basin wide percent of average 72 87 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .2 3.8 5 17.6 18.7 94 DIVIDE PEAK 8800 14.0 17.8 79 22.3 27.6 81 OLD BATTLE 10000 34.4 37.9 91 38.9 36.1 108 SANDSTONE RS 8150 4.7 8.2 57 21.5 23.3 92 WHISKEY PARK 8950 27.1 28.7 94 31.2 34.4 91 ----- ----- Basin wide percent of average 83 94 UPPER GREEN RIVER BIG SANDY OPENING 9100 10.3 13.0 79 14.0 18.7 75 BLIND BULL SUM 8650 22.3 22.6 99 20.9 27.2 77 EAST RIM DIVIDE 7930 10.9 14.4 76 13.3 17.5 76 ELKHART PARK G.S. 9400 10.0 13.1 76 15.4 18.4 84 GROS VENTRE SUMMIT 8775 10.9 13.1 83 14.9 18.3 81 KENDALL R.S. 7740 6.9 8.3 83 16.7 17.8 94 LOOMIS PARK 8240 -M 14.3 * 19.2 21.6 89 NEW FORK LAKE 8340 5.6 8.5 66 12.9 16.6 78 SNIDER BASIN 8250 10.2 12.0 85 14.1 17.4 81 SPRING CREEK DIVIDE 9000 20.4 28.8 71 24.2 31.1 78 TRIPLE PEAK 8500 15.5 24.2 64 24.3 35.4 69 ----- ----- Basin wide percent of average 78 79 LOWER GREEN RIVER HAMS FORK 7840 1.0 4.5 22 13.1 15.4 85 HEWINTA 9500 6.8 4.2 162 17.2 16.6 104 HICKERSON PARK 9150 9.0 2.4 375 15.5 12.6 123 HOLE-IN-ROCK 9150 5.9 1.9 311 13.4 12.6 106 INDIAN CREEK 9425 21.9 28.0 78 21.9 29.5 74 KELLEY R.S. 8180 10.4 13.9 75 18.4 21.5 86 STEEL CREEK PARK 10100 20.5 18.4 111 21.9 16.5 133 ----- ----- Basin wide percent of average 103 97 UPPER BEAR RIVER BUG LAKE 7950 15.6 14.7 106 23.6 22.8 104 HAYDEN FORK 9400 8.4 5.3 158 23.7 23.3 102 KELLEY R.S. 8180 10.4 13.9 75 18.4 21.5 86 LILY LAKE 9050 9.8 8.1 121 20.7 18.3 113 MONTE CRISTO 8960 25.1 25.3 99 29.5 30.6 96 SALT RIVER SUMMIT 7600 8.8 8.5 104 20.5 19.4 106 TRIAL LAKE 9960 22.4 23.4 96 26.5 28.6 93 ----- ----- Basin wide percent of average 101 99 ----------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. 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 1961-90. 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.