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: APRIL 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 15.6 15.0 104 22.2 24.2 92 COTTONWOOD CREEK 7600 22.0 22.7 97 25.3 27.1 93 GRANITE CREEK 6770 16.2 16.9 96 22.0 25.6 86 GRASSY LAKE 7265 33.1 37.1 89 37.5 40.3 93 GROS VENTRE SUMMIT 8775 13.0 15.6 83 14.6 17.3 84 LEWIS LAKE DIVIDE 7860 33.3 36.4 91 34.7 40.9 85 PHILLIPS BENCH 8200 27.6 30.6 90 27.7 32.3 86 SALT RIVER SUMMIT 7600 15.9 13.2 120 19.7 18.4 107 SNAKE RIVER STATION 6920 18.1 18.2 99 24.5 28.2 87 SPRING CREEK DIVIDE 9000 23.4 29.4 80 23.8 29.6 80 THUMB DIVIDE 7980 18.0 17.0 106 19.6 22.6 87 TOGWOTEE PASS 9580 25.6 27.2 94 26.3 30.6 86 TWO OCEAN PLATEAU 9360 30.8 26.8 115 29.7 33.3 89 WILLOW CREEK 8450 29.8 31.7 94 34.5 34.8 99 ----- ----- Basin wide percent of average 95 89 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 20.5 25.6 80 17.8 19.9 89 BLACK BEAR 7950 42.3 40.1 105 38.9 44.2 88 CANYON 7940 13.9 13.0 107 16.3 15.5 105 FISHER CREEK 9100 32.3 38.1 85 30.4 40.0 76 MADISON PLATEAU 7750 23.4 25.3 92 25.4 28.5 89 NORTHEAST ENTRANCE 7350 6.4 8.4 76 12.7 13.0 98 PARKER PEAK 9400 20.4 23.3 88 17.5 17.1 102 SYLVAN LAKE 8420 19.6 23.9 82 22.3 21.0 106 THUMB DIVIDE 7980 18.0 17.0 106 19.6 22.6 87 TWO OCEAN PLATEAU 9360 30.8 26.8 115 29.7 33.3 89 WHISKEY CREEK 6800 16.4 17.6 93 21.1 23.7 89 WHITE MILL 8700 25.0 25.9 97 22.8 30.9 74 WOLVERINE 7650 9.0 11.1 81 10.9 14.2 77 ----- ----- Basin wide percent of average 94 88 WIND RIVER BURROUGHS CREEK 8750 17.6 14.9 118 19.2 18.2 105 COLD SPRINGS 9630 12.9 8.3 155 14.4 12.0 120 DEER PARK 9700 -M -M * 23.9 -M * HOBBS PARK 10100 19.2 16.8 114 17.2 16.0 108 LITTLE WARM 9620 12.7 12.9 98 15.5 15.0 103 SOUTH PASS 9040 18.4 17.7 104 20.6 19.1 108 ST. LAWRENCE ALT 8620 12.1 6.8 178 12.4 11.5 108 TOGWOTEE PASS 9580 25.6 27.2 94 26.3 30.6 86 TOWNSEND CREEK 8700 13.5 10.2 132 16.5 14.2 116 ----- ----- Basin wide percent of average 115 104 BIGHORN BASIN BALD MTN. 9375 22.6 22.6 100 19.9 19.3 103 BEAR TRAP MEADOW 7900 8.4 6.4 131 11.0 9.6 115 BLACKWATER 9780 22.0 24.9 88 19.7 19.5 101 BONE SPRINGS DIV 9350 20.2 18.2 111 19.0 16.8 113 EVENING STAR 9200 24.7 29.5 84 26.8 24.5 109 GRAVE SPRINGS 8550 13.2 -M * 13.7 11.2 122 KIRWIN 9550 14.1 11.2 126 15.3 12.2 125 MARQUETTE 8760 16.0 8.7 184 16.0 11.8 136 MIDDLE POWDER 7760 13.7 13.8 99 13.1 13.5 97 OWL CREEK 8975 9.9 4.5 220 9.4 7.3 129 POWDER RIVER PASS 9480 14.7 11.4 129 15.6 13.3 117 SHELL CREEK 9580 16.9 16.4 103 13.4 14.7 91 SYLVAN LAKE 8420 19.6 23.9 82 22.3 21.0 106 SYLVAN ROAD 8120 10.3 10.3 100 15.3 17.6 87 TIMBER CREEK 7950 10.7 6.5 165 12.7 8.7 146 YOUNTS PEAK 8350 16.1 18.3 88 16.4 18.2 90 ----- ----- Basin wide percent of average 106 109 SHOSHONE RIVER BLACKWATER 9780 22.0 24.9 88 19.7 19.5 101 EVENING STAR 9200 24.7 29.5 84 26.8 24.5 109 KIRWIN 9550 14.1 11.2 126 15.3 12.2 125 MARQUETTE 8760 16.0 8.7 184 16.0 11.8 136 SYLVAN LAKE 8420 19.6 23.9 82 22.3 21.0 106 SYLVAN ROAD 8120 10.3 10.3 100 15.3 17.6 87 YOUNTS PEAK 8350 16.1 18.3 88 16.4 18.2 90 ----- ----- Basin wide percent of average 97 106 POWDER-TONGUE BEAR TRAP MEADOW 7900 8.4 6.4 131 11.0 9.6 115 BONE SPRINGS DIV 9350 20.2 18.2 111 19.0 16.8 113 BURGESS JUNCTION 7880 13.5 13.0 104 14.7 13.1 112 CLOUD PEAK RESERVOIR 9860 18.9 17.0 111 19.0 15.5 123 DOME LAKE 8880 -M 14.8 * 15.9 15.0 106 GRAVE SPRINGS 8550 13.2 -M * 13.7 11.2 122 HANSEN SAWMILL 8760 11.3 7.5 151 -M 9.3 * MIDDLE POWDER 7760 13.7 13.8 99 13.1 13.5 97 POWDER RIVER PASS 9480 14.7 11.4 129 15.6 13.3 117 SUCKER CREEK 8880 14.6 13.4 109 16.2 15.0 108 TIE CREEK 6870 9.3 -M * 15.9 12.6 126 ----- ----- Basin wide percent of average 114 114 BELLE FOURCHE BLIND PARK 6890 8.1 11.2 72 13.8 12.2 113 NORTH RAPID CREEK 6130 9.4 -M * 11.3 -M * WARREN PEAK 6520 13.0 11.2 116 12.1 9.3 130 ----- ----- Basin wide percent of average 94 120 UPPER N. PLATTE RIVER COLUMBINE 9400 19.8 24.0 83 24.5 26.5 92 DIVIDE PEAK 8800 21.4 21.3 100 22.3 25.4 88 ELK RIVER 8700 18.3 19.6 93 21.8 20.8 105 JOE WRIGHT 10120 23.0 24.3 95 25.7 28.0 92 NORTH FRENCH CREEK 10100 34.4 28.4 121 31.7 26.1 121 OLD BATTLE 10000 35.6 36.2 98 37.9 33.3 114 SOUTH BRUSH CREEK 8400 5.7 12.6 45 14.1 18.7 75 TOWER 10500 52.1 49.4 105 41.0 40.2 102 WEBBER SPRINGS 9200 21.8 28.1 78 27.9 28.3 99 WILLOW CREEK PASS 9540 8.9 13.5 66 8.8 14.2 62 ----- ----- Basin wide percent of average 94 98 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 25.2 29.0 87 23.9 21.9 109 CASPER MTN. 7900 13.7 18.8 73 14.7 16.7 88 DEADMAN HILL 10220 16.5 18.0 92 16.2 19.2 84 DEER PARK 9700 -M -M * 23.9 -M * LAPRELE CREEK 8320 9.3 9.3 100 12.6 13.4 94 RENO HILL 8400 14.0 15.1 93 13.6 21.0 65 ROACH 9700 16.4 18.1 91 18.7 23.8 79 SAND LAKE 10080 30.8 36.0 86 26.8 22.9 117 SOUTH PASS 9040 18.4 17.7 104 20.6 19.1 108 WINDY PEAK 7840 8.0 9.0 89 10.8 11.0 98 ----- ----- Basin wide percent of average 89 93 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 11.2 9.8 114 16.9 17.1 99 DIVIDE PEAK 8800 21.4 21.3 100 22.3 25.4 88 OLD BATTLE 10000 35.6 36.2 98 37.9 33.3 114 SANDSTONE RS 8150 14.7 14.3 103 21.2 21.1 100 WHISKEY PARK 8950 31.0 30.5 102 30.4 31.5 97 ----- ----- Basin wide percent of average 102 100 UPPER GREEN RIVER BIG SANDY OPENING 9100 14.2 15.1 94 13.5 17.7 76 BLIND BULL SUM 8650 25.8 29.4 88 20.7 25.9 80 EAST RIM DIVIDE 7930 13.7 15.0 91 13.3 16.5 81 ELKHART PARK G.S. 9400 14.1 14.8 95 14.9 17.4 86 GROS VENTRE SUMMIT 8775 13.0 15.6 83 14.6 17.3 84 KENDALL R.S. 7740 14.3 12.6 113 16.3 16.9 96 LOOMIS PARK 8240 -M 16.6 * 18.9 20.5 92 NEW FORK LAKE 8340 12.2 10.4 117 11.7 15.7 75 SNIDER BASIN 8250 13.5 15.0 90 13.6 16.5 82 SPRING CREEK DIVIDE 9000 23.4 29.4 80 23.8 29.6 80 TRIPLE PEAK 8500 22.0 26.5 83 23.7 33.6 71 ----- ----- Basin wide percent of average 90 81 LOWER GREEN RIVER HAMS FORK 7840 10.8 5.7 189 12.7 14.6 87 HEWINTA 9500 15.5 8.3 187 16.8 14.9 113 HICKERSON PARK 9150 15.2 5.9 258 14.7 11.1 132 HOLE-IN-ROCK 9150 11.9 5.5 216 12.9 11.1 116 INDIAN CREEK 9425 26.4 30.1 88 21.3 28.1 76 KELLEY R.S. 8180 16.3 17.1 95 17.8 20.4 87 STEEL CREEK PARK 10100 19.3 18.1 107 20.5 14.7 139 ----- ----- Basin wide percent of average 127 102 UPPER BEAR RIVER BUG LAKE 7950 22.2 19.2 116 22.9 21.3 108 HAYDEN FORK 9400 15.4 10.0 154 23.2 21.3 109 KELLEY R.S. 8180 16.3 17.1 95 17.8 20.4 87 LILY LAKE 9050 16.4 12.1 136 20.2 16.6 122 MONTE CRISTO 8960 32.6 28.7 114 29.1 28.3 103 SALT RIVER SUMMIT 7600 15.9 13.2 120 19.7 18.4 107 TRIAL LAKE 9960 25.0 25.6 98 26.1 26.4 99 ----- ----- Basin wide percent of average 114 104 ----------------------------------------------------------------------------- -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.