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: MAY 2 , 1998 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 10.2 10.3 99 22.9 25.3 91 COTTONWOOD CREEK 7600 15.5 19.6 79 25.6 28.3 90 GRANITE CREEK 6770 11.9 12.5 95 22.2 26.9 83 GRASSY LAKE 7265 28.1 33.4 84 38.4 42.0 91 GROS VENTRE SUMMIT 8775 11.6 13.6 85 14.9 18.2 82 LEWIS LAKE DIVIDE 7860 28.8 34.1 84 35.3 42.7 83 PHILLIPS BENCH 8200 26.6 29.2 91 29.0 33.7 86 SALT RIVER SUMMIT 7600 10.5 10.0 105 20.4 19.3 106 SNAKE RIVER STATION 6920 12.0 16.1 75 24.8 29.5 84 SPRING CREEK DIVIDE 9000 21.5 29.3 73 24.2 30.9 78 THUMB DIVIDE 7980 13.6 14.8 92 20.0 23.7 84 TOGWOTEE PASS 9580 25.0 28.1 89 26.7 32.0 83 TWO OCEAN PLATEAU 9360 30.5 27.5 111 30.3 34.8 87 WILLOW CREEK 8450 22.5 31.6 71 35.0 36.3 96 ----- ----- Basin wide percent of average 87 87 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 19.6 25.9 76 18.2 21.3 85 BLACK BEAR 7950 39.3 39.6 99 39.9 46.6 86 CANYON 7940 9.7 10.6 92 16.4 16.4 100 FISHER CREEK 9100 29.6 38.6 77 30.9 42.4 73 MADISON PLATEAU 7750 19.9 23.5 85 25.7 30.0 86 NORTHEAST ENTRANCE 7350 .5 5.7 9 12.7 14.0 91 PARKER PEAK 9400 18.7 23.6 79 17.9 18.3 98 SYLVAN LAKE 8420 15.8 23.6 67 22.7 22.4 101 THUMB DIVIDE 7980 13.6 14.8 92 20.0 23.7 84 TWO OCEAN PLATEAU 9360 30.5 27.5 111 30.3 34.8 87 WHISKEY CREEK 6800 14.5 14.8 98 21.2 25.0 85 WHITE MILL 8700 23.1 26.2 88 23.1 32.7 71 WOLVERINE 7650 1.3 7.7 17 -M 15.3 * ----- ----- Basin wide percent of average 84 85 WIND RIVER BURROUGHS CREEK 8750 15.7 12.5 126 19.3 19.5 99 COLD SPRINGS 9630 9.2 6.5 142 14.8 13.2 112 DEER PARK 9700 -M -M * 24.6 -M * HOBBS PARK 10100 19.0 17.9 106 18.2 17.4 105 LITTLE WARM 9620 10.3 10.0 103 15.9 16.4 97 SOUTH PASS 9040 15.8 18.0 88 21.1 20.7 102 ST. LAWRENCE ALT 8620 9.5 5.2 183 13.0 12.6 103 TOGWOTEE PASS 9580 25.0 28.1 89 26.7 32.0 83 TOWNSEND CREEK 8700 11.1 9.3 119 17.0 15.6 109 ----- ----- Basin wide percent of average 108 99 BIGHORN BASIN BALD MTN. 9375 22.2 24.1 92 20.4 20.9 98 BEAR TRAP MEADOW 7900 2.0 4.0 50 11.4 10.7 107 BLACKWATER 9780 21.7 25.6 85 20.5 20.7 99 BONE SPRINGS DIV 9350 20.1 18.3 110 19.8 18.2 109 EVENING STAR 9200 22.1 30.8 72 27.1 26.0 104 GRAVE SPRINGS 8550 11.5 -M * 13.9 12.5 111 KIRWIN 9550 12.5 11.6 108 15.9 13.4 119 MARQUETTE 8760 13.9 8.5 164 16.5 13.6 121 MIDDLE POWDER 7760 11.8 14.7 80 13.4 14.9 90 OWL CREEK 8975 6.0 3.2 188 9.7 8.2 118 POWDER RIVER PASS 9480 11.5 10.2 113 16.1 14.8 109 SHELL CREEK 9580 16.0 17.0 94 13.8 16.0 86 SYLVAN LAKE 8420 15.8 23.6 67 22.7 22.4 101 SYLVAN ROAD 8120 4.8 7.6 63 15.3 18.7 82 TIMBER CREEK 7950 7.6 5.8 131 12.7 10.1 126 YOUNTS PEAK 8350 15.4 18.1 85 16.8 19.4 87 ----- ----- Basin wide percent of average 91 102 SHOSHONE RIVER BLACKWATER 9780 21.7 25.6 85 20.5 20.7 99 EVENING STAR 9200 22.1 30.8 72 27.1 26.0 104 KIRWIN 9550 12.5 11.6 108 15.9 13.4 119 MARQUETTE 8760 13.9 8.5 164 16.5 13.6 121 SYLVAN LAKE 8420 15.8 23.6 67 22.7 22.4 101 SYLVAN ROAD 8120 4.8 7.6 63 15.3 18.7 82 YOUNTS PEAK 8350 15.4 18.1 85 16.8 19.4 87 ----- ----- Basin wide percent of average 84 100 POWDER-TONGUE BEAR TRAP MEADOW 7900 2.0 4.0 50 11.4 10.7 107 BONE SPRINGS DIV 9350 20.1 18.3 110 19.8 18.2 109 BURGESS JUNCTION 7880 11.9 13.3 89 15.1 14.5 104 CLOUD PEAK RESERVOIR 9860 16.9 17.6 96 19.8 17.2 115 DOME LAKE 8880 -M 14.7 * 16.4 16.5 99 GRAVE SPRINGS 8550 11.5 -M * 13.9 12.5 111 HANSEN SAWMILL 8760 7.1 6.7 106 13.6 10.4 131 MIDDLE POWDER 7760 11.8 14.7 80 13.4 14.9 90 POWDER RIVER PASS 9480 11.5 10.2 113 16.1 14.8 109 SUCKER CREEK 8880 12.2 13.6 90 16.9 16.6 102 TIE CREEK 6870 5.0 -M * 16.3 13.9 117 ----- ----- Basin wide percent of average 95 108 BELLE FOURCHE BLIND PARK 6890 .1 9.2 1 13.9 13.9 100 NORTH RAPID CREEK 6130 2.8 -M * 11.7 -M * WARREN PEAK 6520 6.9 9.2 75 12.3 10.4 118 ----- ----- Basin wide percent of average 38 108 UPPER N. PLATTE RIVER COLUMBINE 9400 12.8 21.5 60 25.5 28.2 90 DIVIDE PEAK 8800 15.9 18.8 85 22.3 27.4 81 ELK RIVER 8700 10.8 15.7 69 22.6 22.2 102 JOE WRIGHT 10120 23.0 24.6 93 27.4 30.4 90 NORTH FRENCH CREEK 10100 32.1 29.2 110 32.6 28.1 116 OLD BATTLE 10000 34.8 38.1 91 38.9 35.8 109 SOUTH BRUSH CREEK 8400 2.7 10.3 26 14.3 20.7 69 TOWER 10500 53.6 51.1 105 45.2 43.4 104 WEBBER SPRINGS 9200 18.5 25.6 72 28.6 30.7 93 WILLOW CREEK PASS 9540 9.3 13.3 70 9.7 15.5 63 ----- ----- Basin wide percent of average 86 95 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 23.9 28.6 84 24.7 23.9 103 CASPER MTN. 7900 9.6 17.3 55 15.0 18.9 79 DEADMAN HILL 10220 17.0 19.1 89 17.3 21.2 82 DEER PARK 9700 -M -M * 24.6 -M * LAPRELE CREEK 8320 2.8 6.1 46 12.7 14.8 86 RENO HILL 8400 9.0 13.1 69 13.6 22.5 60 ROACH 9700 14.8 18.0 82 19.6 25.9 76 SAND LAKE 10080 30.1 37.1 81 27.3 24.9 110 SOUTH PASS 9040 15.8 18.0 88 21.1 20.7 102 WINDY PEAK 7840 3.0 7.6 39 10.8 12.3 88 ----- ----- Basin wide percent of average 76 88 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 2.2 4.5 49 17.5 18.6 94 DIVIDE PEAK 8800 15.9 18.8 85 22.3 27.4 81 OLD BATTLE 10000 34.8 38.1 91 38.9 35.8 109 SANDSTONE RS 8150 6.0 9.3 65 21.5 23.1 93 WHISKEY PARK 8950 28.1 29.3 96 31.2 34.1 91 ----- ----- Basin wide percent of average 87 95 UPPER GREEN RIVER BIG SANDY OPENING 9100 11.3 13.6 83 14.0 18.6 75 BLIND BULL SUM 8650 23.6 22.7 104 20.9 27.0 77 EAST RIM DIVIDE 7930 11.9 14.7 81 13.3 17.4 76 ELKHART PARK G.S. 9400 10.8 13.7 79 15.4 18.3 84 GROS VENTRE SUMMIT 8775 11.6 13.6 85 14.9 18.2 82 KENDALL R.S. 7740 8.1 9.8 83 16.7 17.7 94 LOOMIS PARK 8240 -M 14.8 * 19.2 21.5 89 NEW FORK LAKE 8340 6.8 8.9 76 12.8 16.5 78 SNIDER BASIN 8250 11.4 12.7 90 14.1 17.3 82 SPRING CREEK DIVIDE 9000 21.5 29.3 73 24.2 30.9 78 TRIPLE PEAK 8500 17.0 24.7 69 24.2 35.1 69 ----- ----- Basin wide percent of average 82 80 LOWER GREEN RIVER HAMS FORK 7840 3.3 5.3 62 13.1 15.3 86 HEWINTA 9500 8.7 4.9 178 17.3 16.4 105 HICKERSON PARK 9150 11.0 2.7 407 15.5 12.4 125 HOLE-IN-ROCK 9150 7.8 2.2 355 13.4 12.4 108 INDIAN CREEK 9425 23.2 28.6 81 21.9 29.3 75 KELLEY R.S. 8180 12.0 14.6 82 18.4 21.4 86 STEEL CREEK PARK 10100 20.7 18.7 111 21.8 16.2 135 ----- ----- Basin wide percent of average 113 98 UPPER BEAR RIVER BUG LAKE 7950 17.0 15.6 109 23.5 22.7 104 HAYDEN FORK 9400 10.6 6.2 171 23.7 23.1 103 KELLEY R.S. 8180 12.0 14.6 82 18.4 21.4 86 LILY LAKE 9050 11.6 8.5 136 20.7 18.1 114 MONTE CRISTO 8960 27.1 25.9 105 29.5 30.4 97 SALT RIVER SUMMIT 7600 10.5 10.0 105 20.4 19.3 106 TRIAL LAKE 9960 23.5 23.8 99 26.5 28.4 93 ----- ----- Basin wide percent of average 107 100 ----------------------------------------------------------------------------- -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.