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 THURSDAY: APRIL 30 , 1998 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 11.5 11.0 105 23.0 25.1 92 COTTONWOOD CREEK 7600 17.2 20.2 85 25.6 28.1 91 GRANITE CREEK 6770 13.0 13.2 98 22.3 26.7 84 GRASSY LAKE 7265 29.9 34.1 88 38.4 41.8 92 GROS VENTRE SUMMIT 8775 12.0 14.0 86 14.9 18.0 83 LEWIS LAKE DIVIDE 7860 30.4 34.6 88 35.3 42.5 83 PHILLIPS BENCH 8200 27.5 29.6 93 29.0 33.5 87 SALT RIVER SUMMIT 7600 12.1 11.0 110 20.2 19.1 106 SNAKE RIVER STATION 6920 13.5 16.5 82 24.8 29.3 85 SPRING CREEK DIVIDE 9000 22.6 29.6 76 24.2 30.7 79 THUMB DIVIDE 7980 15.0 15.2 99 20.0 23.5 85 TOGWOTEE PASS 9580 25.2 28.2 89 26.7 31.8 84 TWO OCEAN PLATEAU 9360 30.9 27.5 112 30.3 34.6 88 WILLOW CREEK 8450 24.5 31.9 77 35.0 36.1 97 ----- ----- Basin wide percent of average 90 88 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 20.1 26.0 77 18.3 21.1 87 BLACK BEAR 7950 -M 39.8 * 39.9 46.3 86 CANYON 7940 11.1 11.1 100 16.4 16.2 101 FISHER CREEK 9100 30.0 38.7 78 30.8 42.0 73 MADISON PLATEAU 7750 20.6 23.9 86 25.7 29.8 86 NORTHEAST ENTRANCE 7350 .9 6.1 15 12.7 13.8 92 PARKER PEAK 9400 -M 23.7 * 17.9 18.1 99 SYLVAN LAKE 8420 16.9 23.8 71 22.6 22.2 102 THUMB DIVIDE 7980 15.0 15.2 99 20.0 23.5 85 TWO OCEAN PLATEAU 9360 30.9 27.5 112 30.3 34.6 88 WHISKEY CREEK 6800 15.2 15.4 99 21.3 24.8 86 WHITE MILL 8700 23.4 26.3 89 23.1 32.5 71 WOLVERINE 7650 3.8 8.3 46 10.9 15.1 72 ----- ----- Basin wide percent of average 85 85 WIND RIVER BURROUGHS CREEK 8750 16.4 13.1 125 19.3 19.3 100 COLD SPRINGS 9630 10.4 6.9 151 14.8 13.0 114 DEER PARK 9700 -M -M * 24.6 -M * HOBBS PARK 10100 19.5 17.9 109 18.2 17.2 106 LITTLE WARM 9620 11.2 10.6 106 15.9 16.2 98 SOUTH PASS 9040 16.4 18.1 91 21.1 20.5 103 ST. LAWRENCE ALT 8620 10.2 5.5 185 12.9 12.4 104 TOGWOTEE PASS 9580 25.2 28.2 89 26.7 31.8 84 TOWNSEND CREEK 8700 11.6 9.6 121 17.0 15.4 110 ----- ----- Basin wide percent of average 110 100 BIGHORN BASIN BALD MTN. 9375 22.5 24.0 94 20.4 20.7 99 BEAR TRAP MEADOW 7900 3.8 4.4 86 11.6 10.5 110 BLACKWATER 9780 22.3 25.6 87 20.5 20.5 100 BONE SPRINGS DIV 9350 -M 18.4 * 19.9 18.0 111 EVENING STAR 9200 23.0 30.7 75 27.1 25.8 105 GRAVE SPRINGS 8550 12.0 -M * 13.9 12.3 113 KIRWIN 9550 13.0 11.7 111 15.9 13.2 120 MARQUETTE 8760 14.4 8.6 167 16.5 13.4 123 MIDDLE POWDER 7760 12.4 14.7 84 13.4 14.7 91 OWL CREEK 8975 7.1 3.5 203 9.8 8.0 123 POWDER RIVER PASS 9480 12.4 10.6 117 16.1 14.6 110 SHELL CREEK 9580 -M 17.0 * 13.8 15.8 87 SYLVAN LAKE 8420 16.9 23.8 71 22.6 22.2 102 SYLVAN ROAD 8120 6.1 8.1 75 15.3 18.5 83 TIMBER CREEK 7950 8.5 6.0 142 12.7 9.9 128 YOUNTS PEAK 8350 15.8 18.3 86 16.8 19.2 88 ----- ----- Basin wide percent of average 94 103 SHOSHONE RIVER BLACKWATER 9780 22.3 25.6 87 20.5 20.5 100 EVENING STAR 9200 23.0 30.7 75 27.1 25.8 105 KIRWIN 9550 13.0 11.7 111 15.9 13.2 120 MARQUETTE 8760 14.4 8.6 167 16.5 13.4 123 SYLVAN LAKE 8420 16.9 23.8 71 22.6 22.2 102 SYLVAN ROAD 8120 6.1 8.1 75 15.3 18.5 83 YOUNTS PEAK 8350 15.8 18.3 86 16.8 19.2 88 ----- ----- Basin wide percent of average 88 101 POWDER-TONGUE BEAR TRAP MEADOW 7900 3.8 4.4 86 11.6 10.5 110 BONE SPRINGS DIV 9350 -M 18.4 * 19.9 18.0 111 BURGESS JUNCTION 7880 12.6 13.5 93 15.1 14.3 106 CLOUD PEAK RESERVOIR 9860 18.2 17.6 103 19.8 17.0 116 DOME LAKE 8880 -M 15.0 * 16.4 16.3 101 GRAVE SPRINGS 8550 12.0 -M * 13.9 12.3 113 HANSEN SAWMILL 8760 8.3 6.9 120 13.6 10.2 133 MIDDLE POWDER 7760 12.4 14.7 84 13.4 14.7 91 POWDER RIVER PASS 9480 12.4 10.6 117 16.1 14.6 110 SUCKER CREEK 8880 12.9 13.8 93 16.9 16.4 103 TIE CREEK 6870 6.3 -M * 16.3 13.7 119 ----- ----- Basin wide percent of average 99 109 BELLE FOURCHE BLIND PARK 6890 2.2 9.7 23 13.9 13.7 101 NORTH RAPID CREEK 6130 4.7 -M * 11.8 -M * WARREN PEAK 6520 8.6 9.7 89 12.4 10.2 122 ----- ----- Basin wide percent of average 56 110 UPPER N. PLATTE RIVER COLUMBINE 9400 14.8 22.2 67 25.5 28.0 91 DIVIDE PEAK 8800 17.5 19.5 90 22.5 27.2 83 ELK RIVER 8700 12.2 16.5 74 22.2 22.0 101 JOE WRIGHT 10120 23.2 24.7 94 27.3 30.1 91 NORTH FRENCH CREEK 10100 33.4 29.3 114 32.6 27.9 117 OLD BATTLE 10000 35.2 38.1 92 38.9 35.5 110 SOUTH BRUSH CREEK 8400 3.5 10.8 32 14.4 20.5 70 TOWER 10500 53.6 51.0 105 45.1 43.0 105 WEBBER SPRINGS 9200 19.8 26.2 76 28.7 30.4 94 WILLOW CREEK PASS 9540 9.7 13.5 72 9.5 15.3 62 ----- ----- Basin wide percent of average 89 95 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 24.9 28.9 86 24.7 23.7 104 CASPER MTN. 7900 10.7 17.9 60 15.0 18.6 81 DEADMAN HILL 10220 17.1 19.0 90 17.1 21.0 81 DEER PARK 9700 -M -M * 24.6 -M * LAPRELE CREEK 8320 4.3 6.5 66 12.7 14.6 87 RENO HILL 8400 10.2 13.5 76 13.7 22.3 61 ROACH 9700 15.1 18.1 83 19.5 25.6 76 SAND LAKE 10080 31.0 37.1 84 27.3 24.7 111 SOUTH PASS 9040 16.4 18.1 91 21.1 20.5 103 WINDY PEAK 7840 4.2 8.0 53 10.8 12.1 89 ----- ----- Basin wide percent of average 80 88 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 4.3 5.2 83 17.6 18.4 96 DIVIDE PEAK 8800 17.5 19.5 90 22.5 27.2 83 OLD BATTLE 10000 35.2 38.1 92 38.9 35.5 110 SANDSTONE RS 8150 8.5 10.1 84 21.5 22.9 94 WHISKEY PARK 8950 28.9 29.7 97 31.1 33.8 92 ----- ----- Basin wide percent of average 92 96 UPPER GREEN RIVER BIG SANDY OPENING 9100 12.3 14.0 88 13.9 18.4 76 BLIND BULL SUM 8650 23.9 23.2 103 20.9 26.8 78 EAST RIM DIVIDE 7930 12.7 14.8 86 13.3 17.2 77 ELKHART PARK G.S. 9400 9.4 14.1 67 15.4 18.1 85 GROS VENTRE SUMMIT 8775 12.0 14.0 86 14.9 18.0 83 KENDALL R.S. 7740 9.3 10.8 86 16.7 17.5 95 LOOMIS PARK 8240 -M 15.2 * 19.1 21.3 90 NEW FORK LAKE 8340 8.2 9.2 89 12.6 16.3 77 SNIDER BASIN 8250 12.4 13.2 94 14.1 17.1 82 SPRING CREEK DIVIDE 9000 22.6 29.6 76 24.2 30.7 79 TRIPLE PEAK 8500 18.3 25.1 73 24.2 34.9 69 ----- ----- Basin wide percent of average 84 80 LOWER GREEN RIVER HAMS FORK 7840 5.4 5.7 95 13.1 15.2 86 HEWINTA 9500 9.7 5.5 176 17.3 16.2 107 HICKERSON PARK 9150 12.2 3.1 394 15.4 12.2 126 HOLE-IN-ROCK 9150 8.8 2.5 352 13.4 12.2 110 INDIAN CREEK 9425 24.6 29.0 85 21.9 29.1 75 KELLEY R.S. 8180 13.6 15.2 89 18.4 21.2 87 STEEL CREEK PARK 10100 20.8 18.8 111 21.7 16.0 136 ----- ----- Basin wide percent of average 119 99 UPPER BEAR RIVER BUG LAKE 7950 18.3 16.2 113 23.5 22.5 104 HAYDEN FORK 9400 11.8 6.9 171 23.6 22.9 103 KELLEY R.S. 8180 13.6 15.2 89 18.4 21.2 87 LILY LAKE 9050 12.8 9.0 142 20.7 17.9 116 MONTE CRISTO 8960 29.2 26.4 111 29.6 30.1 98 SALT RIVER SUMMIT 7600 12.1 11.0 110 20.2 19.1 106 TRIAL LAKE 9960 24.6 24.1 102 26.4 28.2 94 ----- ----- Basin wide percent of average 113 100 ----------------------------------------------------------------------------- -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.