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 18 , 1998 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 1.7 4.0 42 24.5 26.7 92 COTTONWOOD CREEK 7600 9.9 11.5 86 28.5 29.8 96 GRANITE CREEK 6770 4.6 6.3 73 23.8 28.4 84 GRASSY LAKE 7265 20.4 24.5 83 40.9 44.3 92 GROS VENTRE SUMMIT 8775 7.6 8.3 92 16.4 19.2 85 LEWIS LAKE DIVIDE 7860 21.9 27.9 78 37.1 45.1 82 PHILLIPS BENCH 8200 23.3 23.9 97 31.0 35.5 87 SALT RIVER SUMMIT 7600 2.8 .0 * 22.9 20.4 112 SNAKE RIVER STATION 6920 .3 9.5 3 26.7 31.1 86 SPRING CREEK DIVIDE 9000 20.4 24.8 82 26.3 32.4 81 THUMB DIVIDE 7980 5.3 9.2 58 21.6 25.0 86 TOGWOTEE PASS 9580 23.5 25.6 92 28.2 33.8 83 TWO OCEAN PLATEAU 9360 28.2 25.6 110 32.3 36.7 88 WILLOW CREEK 8450 17.9 26.3 68 38.1 38.3 99 ----- ----- Basin wide percent of average 81 89 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 16.9 23.9 71 19.0 23.3 82 BLACK BEAR 7950 36.1 35.3 102 43.3 48.7 89 CANYON 7940 1.8 5.6 32 17.1 17.7 97 FISHER CREEK 9100 27.7 36.4 76 32.5 44.8 73 MADISON PLATEAU 7750 15.6 16.9 92 28.5 31.8 90 NORTHEAST ENTRANCE 7350 .0 2.2 0 13.4 15.3 88 PARKER PEAK 9400 14.7 22.0 67 18.9 20.0 94 SYLVAN LAKE 8420 10.8 19.5 55 24.6 24.5 100 THUMB DIVIDE 7980 5.3 9.2 58 21.6 25.0 86 TWO OCEAN PLATEAU 9360 28.2 25.6 110 32.3 36.7 88 WHISKEY CREEK 6800 8.2 8.0 102 23.7 26.4 90 WHITE MILL 8700 20.5 23.9 86 24.7 34.8 71 WOLVERINE 7650 .0 2.5 0 11.0 16.8 65 ----- ----- Basin wide percent of average 80 85 WIND RIVER BURROUGHS CREEK 8750 11.3 6.0 188 20.3 21.1 96 COLD SPRINGS 9630 5.0 2.4 208 16.4 14.7 112 DEER PARK 9700 -M -M * 26.2 -M * HOBBS PARK 10100 19.0 15.6 122 20.5 19.3 106 LITTLE WARM 9620 5.5 4.6 120 17.2 17.9 96 SOUTH PASS 9040 12.2 15.4 79 22.7 22.5 101 ST. LAWRENCE ALT 8620 2.2 2.0 110 15.1 13.8 109 TOGWOTEE PASS 9580 23.5 25.6 92 28.2 33.8 83 TOWNSEND CREEK 8700 5.7 5.3 108 18.6 17.2 108 ----- ----- Basin wide percent of average 110 99 BIGHORN BASIN BALD MTN. 9375 19.3 23.4 82 20.6 23.3 88 BEAR TRAP MEADOW 7900 .0 1.2 0 13.3 12.4 107 BLACKWATER 9780 21.0 23.7 89 21.7 22.5 96 BONE SPRINGS DIV 9350 14.9 15.1 99 20.1 20.3 99 EVENING STAR 9200 19.3 29.5 65 28.5 28.1 101 GRAVE SPRINGS 8550 7.2 -M * 15.7 14.5 108 KIRWIN 9550 10.1 9.2 110 17.4 14.9 117 MARQUETTE 8760 10.2 7.0 146 17.3 15.6 111 MIDDLE POWDER 7760 5.5 12.0 46 14.6 16.7 87 OWL CREEK 8975 .1 .8 12 10.8 9.5 114 POWDER RIVER PASS 9480 7.8 5.3 147 17.5 16.6 105 SHELL CREEK 9580 12.7 16.0 79 14.5 18.0 81 SYLVAN LAKE 8420 10.8 19.5 55 24.6 24.5 100 SYLVAN ROAD 8120 .1 3.5 3 16.6 20.4 81 TIMBER CREEK 7950 .0 2.1 0 13.0 12.1 107 YOUNTS PEAK 8350 12.6 14.6 86 18.0 20.9 86 ----- ----- Basin wide percent of average 79 98 SHOSHONE RIVER BLACKWATER 9780 21.0 23.7 89 21.7 22.5 96 EVENING STAR 9200 19.3 29.5 65 28.5 28.1 101 KIRWIN 9550 10.1 9.2 110 17.4 14.9 117 MARQUETTE 8760 10.2 7.0 146 17.3 15.6 111 SYLVAN LAKE 8420 10.8 19.5 55 24.6 24.5 100 SYLVAN ROAD 8120 .1 3.5 3 16.6 20.4 81 YOUNTS PEAK 8350 12.6 14.6 86 18.0 20.9 86 ----- ----- Basin wide percent of average 79 98 POWDER-TONGUE BEAR TRAP MEADOW 7900 .0 1.2 0 13.3 12.4 107 BONE SPRINGS DIV 9350 14.9 15.1 99 20.1 20.3 99 BURGESS JUNCTION 7880 6.8 9.5 72 15.3 16.2 94 CLOUD PEAK RESERVOIR 9860 14.3 14.7 97 21.0 19.4 108 DOME LAKE 8880 -M 9.2 * 17.3 18.5 94 GRAVE SPRINGS 8550 7.2 -M * 15.7 14.5 108 HANSEN SAWMILL 8760 .3 3.4 9 14.5 11.8 123 MIDDLE POWDER 7760 5.5 12.0 46 14.6 16.7 87 POWDER RIVER PASS 9480 7.8 5.3 147 17.5 16.6 105 SUCKER CREEK 8880 5.7 9.4 61 17.2 18.7 92 TIE CREEK 6870 .0 -M * 16.6 15.6 106 ----- ----- Basin wide percent of average 78 101 BELLE FOURCHE BLIND PARK 6890 .5 3.8 13 15.7 16.2 97 NORTH RAPID CREEK 6130 .0 -M * 13.4 -M * WARREN PEAK 6520 .3 3.8 8 13.5 11.9 113 ----- ----- Basin wide percent of average 11 104 UPPER N. PLATTE RIVER COLUMBINE 9400 .0 12.1 0 27.6 29.6 93 DIVIDE PEAK 8800 7.6 10.8 70 24.4 29.2 84 ELK RIVER 8700 .3 7.0 4 24.3 23.4 104 JOE WRIGHT 10120 20.0 22.5 89 30.1 32.8 92 NORTH FRENCH CREEK 10100 31.6 25.6 123 35.8 30.4 118 OLD BATTLE 10000 34.1 34.6 99 41.6 37.8 110 SOUTH BRUSH CREEK 8400 .8 5.0 16 16.5 22.1 75 TOWER 10500 52.8 49.7 106 47.8 46.6 103 WEBBER SPRINGS 9200 11.9 18.7 64 30.6 32.3 95 WILLOW CREEK PASS 9540 5.7 9.2 62 10.9 17.0 64 ----- ----- Basin wide percent of average 84 96 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 18.0 22.8 79 27.4 25.6 107 CASPER MTN. 7900 .2 9.8 2 15.8 21.0 75 DEADMAN HILL 10220 15.4 17.1 90 19.3 23.0 84 DEER PARK 9700 -M -M * 26.2 -M * LAPRELE CREEK 8320 .0 3.0 0 13.0 16.6 78 RENO HILL 8400 .0 7.6 0 14.5 23.4 62 ROACH 9700 11.1 14.5 77 21.7 28.2 77 SAND LAKE 10080 28.9 33.5 86 29.9 26.8 112 SOUTH PASS 9040 12.2 15.4 79 22.7 22.5 101 WINDY PEAK 7840 .0 2.9 0 11.6 14.1 82 ----- ----- Basin wide percent of average 68 87 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .1 .0 * 18.2 19.8 92 DIVIDE PEAK 8800 7.6 10.8 70 24.4 29.2 84 OLD BATTLE 10000 34.1 34.6 99 41.6 37.8 110 SANDSTONE RS 8150 .0 1.9 0 22.8 24.6 93 WHISKEY PARK 8950 27.4 23.0 119 34.8 36.4 96 ----- ----- Basin wide percent of average 98 96 UPPER GREEN RIVER BIG SANDY OPENING 9100 7.7 8.1 95 16.1 19.7 82 BLIND BULL SUM 8650 21.6 21.3 101 22.7 28.3 80 EAST RIM DIVIDE 7930 7.4 11.7 63 14.3 18.3 78 ELKHART PARK G.S. 9400 8.0 8.8 91 17.1 19.3 89 GROS VENTRE SUMMIT 8775 7.6 8.3 92 16.4 19.2 85 KENDALL R.S. 7740 .0 .0 100* 17.8 18.8 95 LOOMIS PARK 8240 -M 9.3 * 20.6 22.7 91 NEW FORK LAKE 8340 .4 5.1 8 13.8 17.4 79 SNIDER BASIN 8250 5.4 7.0 77 15.7 18.3 86 SPRING CREEK DIVIDE 9000 20.4 24.8 82 26.3 32.4 81 TRIPLE PEAK 8500 11.8 20.1 59 26.2 37.1 71 ----- ----- Basin wide percent of average 78 82 LOWER GREEN RIVER HAMS FORK 7840 .0 .0 100* 14.2 16.1 88 HEWINTA 9500 1.6 .0 * 18.6 17.8 104 HICKERSON PARK 9150 4.4 .5 880* 17.7 13.9 127 HOLE-IN-ROCK 9150 .3 .4 75* 15.3 13.9 110 INDIAN CREEK 9425 21.8 23.6 92 24.0 30.9 78 KELLEY R.S. 8180 7.0 8.2 85 20.3 22.7 89 STEEL CREEK PARK 10100 21.6 15.8 137 23.2 18.1 128 ----- ----- Basin wide percent of average 114* 100 UPPER BEAR RIVER BUG LAKE 7950 12.8 8.7 147 25.4 23.9 106 HAYDEN FORK 9400 4.6 .6 767* 25.9 24.8 104 KELLEY R.S. 8180 7.0 8.2 85 20.3 22.7 89 LILY LAKE 9050 5.3 4.9 108 22.6 19.7 115 MONTE CRISTO 8960 -M 19.8 * -M 32.2 * SALT RIVER SUMMIT 7600 2.8 .0 * 22.9 20.4 112 TRIAL LAKE 9960 19.7 19.4 102 29.0 30.2 96 ----- ----- Basin wide percent of average 118 103 ----------------------------------------------------------------------------- -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.