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 8 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 -M 17.0 * -M 23.4 * COTTONWOOD CREEK 7600 25.5 24.0 107 28.4 26.4 108 GRANITE CREEK 6770 21.4 18.4 117 23.5 24.7 96 GRASSY LAKE 7265 43.2 37.2 117 41.7 39.0 107 GROS VENTRE SUMMIT 8775 -M 16.0 * -M 16.9 * LEWIS LAKE DIVIDE 7860 41.5 36.3 115 41.0 39.8 104 PHILLIPS BENCH 8200 -M 30.2 * -M 31.4 * SALT RIVER SUMMIT 7600 16.0 14.2 113 18.9 17.9 107 SNAKE RIVER STATION 6920 22.4 18.9 119 26.4 27.4 96 SPRING CREEK DIVIDE 9000 31.4 28.9 109 29.0 28.9 101 THUMB DIVIDE 7980 -M 17.4 * -M 21.9 * TOGWOTEE PASS 9580 -M 26.2 * 29.2 29.7 99 TWO OCEAN PLATEAU 9360 37.3 26.9 140 31.9 32.3 99 WILLOW CREEK 8450 34.3 31.2 110 38.5 33.8 115 ----- ----- Basin wide percent of average 116 103 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 26.9 24.7 109 23.9 19.0 126 BLACK BEAR 7950 51.7 39.4 131 -M 42.7 * CANYON 7940 18.5 13.5 139 20.0 15.0 135 FISHER CREEK 9100 41.0 37.2 111 37.8 38.3 99 MADISON PLATEAU 7750 -M 25.4 * 33.0 27.5 121 NORTHEAST ENTRANCE 7350 11.7 9.1 129 14.5 12.5 117 PARKER PEAK 9400 24.2 22.7 108 -M 16.4 * SYLVAN LAKE 8420 26.9 23.2 116 28.2 20.2 141 THUMB DIVIDE 7980 -M 17.4 * -M 21.9 * TWO OCEAN PLATEAU 9360 37.3 26.9 140 31.9 32.3 99 WHISKEY CREEK 6800 -M 17.9 * -M 22.9 * WHITE MILL 8700 28.7 25.5 113 25.4 29.7 86 WOLVERINE 7650 11.6 11.9 99 13.1 13.5 98 ----- ----- Basin wide percent of average 120 110 WIND RIVER BURROUGHS CREEK 8750 17.4 15.2 115 18.7 17.4 107 COLD SPRINGS 9630 9.5 8.6 110 13.2 11.2 118 DEER PARK 9700 18.2 -M * 23.4 -M * HOBBS PARK 10100 19.4 16.0 122 17.9 15.0 120 LITTLE WARM 9620 15.5 12.6 124 16.9 14.1 120 SOUTH PASS 9040 19.2 17.2 113 20.4 18.0 113 ST. LAWRENCE ALT 8620 8.0 7.5 109 11.5 10.9 106 TOGWOTEE PASS 9580 -M 26.2 * 29.2 29.7 99 TOWNSEND CREEK 8700 11.5 10.2 113 14.7 13.4 111 ----- ----- Basin wide percent of average 116 110 BIGHORN BASIN BALD MTN. 9375 20.7 21.5 96 19.0 18.2 105 BEAR TRAP MEADOW 7900 4.6 7.1 65 10.1 8.9 115 BLACKWATER 9780 31.9 23.7 135 26.2 18.7 140 BONE SPRINGS DIV 9350 18.0 17.4 104 17.2 16.0 109 EVENING STAR 9200 34.3 28.4 122 35.3 23.5 150 GRAVE SPRINGS 8550 8.5 10.2 84 11.9 10.4 115 KIRWIN 9550 13.4 10.6 126 15.0 11.5 132 MARQUETTE 8760 9.5 8.5 111 10.1 10.5 97 MIDDLE POWDER 7760 11.9 13.0 91 16.5 12.6 131 OWL CREEK 8975 7.3 4.8 154 7.5 6.8 112 POWDER RIVER PASS 9480 12.4 11.4 109 15.7 12.4 128 SHELL CREEK 9580 17.4 15.7 111 16.0 13.9 116 SYLVAN LAKE 8420 26.9 23.2 116 28.2 20.2 141 SYLVAN ROAD 8120 -M 11.7 * -M 16.9 * TIMBER CREEK 7950 5.8 6.5 90 7.6 7.8 98 YOUNTS PEAK 8350 21.9 17.9 123 19.7 17.4 113 ----- ----- Basin wide percent of average 112 123 SHOSHONE RIVER BLACKWATER 9780 31.9 23.7 135 26.2 18.7 140 EVENING STAR 9200 34.3 28.4 122 35.3 23.5 150 KIRWIN 9550 13.4 10.6 126 15.0 11.5 132 MARQUETTE 8760 9.5 8.5 111 10.1 10.5 97 SYLVAN LAKE 8420 26.9 23.2 116 28.2 20.2 141 SYLVAN ROAD 8120 -M 11.7 * -M 16.9 * YOUNTS PEAK 8350 21.9 17.9 123 19.7 17.4 113 ----- ----- Basin wide percent of average 123 133 POWDER-TONGUE BEAR TRAP MEADOW 7900 4.6 7.1 65 10.1 8.9 115 BIG GOOSE 7990 7.0 -M * 11.1 -M * BONE SPRINGS DIV 9350 18.0 17.4 104 17.2 16.0 109 BURGESS JUNCTION 7880 9.6 12.5 78 11.5 12.2 94 CLOUD PEAK RESERVOIR 9860 16.4 16.0 103 15.0 14.2 105 DOME LAKE 8880 -M 14.5 * 12.1 14.0 87 GRAVE SPRINGS 8550 8.5 10.2 84 11.9 10.4 115 HANSEN SAWMILL 8760 5.1 7.5 69 9.1 8.5 108 MIDDLE POWDER 7760 11.9 13.0 91 16.5 12.6 131 POWDER RIVER PASS 9480 12.4 11.4 109 15.7 12.4 128 SUCKER CREEK 8880 11.6 12.9 91 14.0 14.0 100 TIE CREEK 6870 -M -M * -M 11.7 * ----- ----- Basin wide percent of average 91 109 BELLE FOURCHE BLIND PARK 6890 6.8 11.5 60 16.4 11.0 151 NORTH RAPID CREEK 6130 6.1 -M * 13.7 -M * WARREN PEAK 6520 11.0 11.5 97 15.0 8.6 175 ----- ----- Basin wide percent of average 79 162 UPPER N. PLATTE RIVER COLUMBINE 9400 18.7 24.7 76 22.5 25.4 89 DIVIDE PEAK 8800 19.9 21.7 93 25.4 23.9 106 ELK RIVER 8700 16.4 20.2 82 22.7 19.9 114 JOE WRIGHT 10120 20.0 23.2 87 26.7 26.4 102 NORTH FRENCH CREEK 10100 -M 27.0 * -M 24.7 * OLD BATTLE 10000 30.2 34.2 89 36.5 31.5 116 SOUTH BRUSH CREEK 8400 11.5 13.4 87 19.9 17.4 115 TOWER 10500 -M 47.3 * -M 37.9 * WEBBER SPRINGS 9200 19.2 28.5 68 26.9 26.5 102 WILLOW CREEK PASS 9540 12.2 12.9 96 12.6 13.4 95 ----- ----- Basin wide percent of average 83 105 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 15.9 27.9 57 22.7 20.5 111 CASPER MTN. 7900 -M 17.9 * -M 15.2 * DEADMAN HILL 10220 15.9 17.4 92 17.4 17.9 98 DEER PARK 9700 18.2 -M * 23.4 -M * LAPRELE CREEK 8320 -M 10.5 * 15.0 12.5 120 RENO HILL 8400 14.2 15.0 95 19.2 20.0 96 ROACH 9700 15.5 17.9 87 19.7 22.2 89 SAND LAKE 10080 35.5 34.5 103 29.0 21.4 136 SOUTH PASS 9040 19.2 17.2 113 20.4 18.0 113 WINDY PEAK 7840 7.0 9.1 76 13.5 10.2 133 ----- ----- Basin wide percent of average 89 110 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 11.5 11.2 102 17.7 16.2 110 DIVIDE PEAK 8800 19.9 21.7 93 25.4 23.9 106 OLD BATTLE 10000 30.2 34.2 89 36.5 31.5 116 SANDSTONE RS 8150 12.5 15.2 82 20.9 19.7 107 WHISKEY PARK 8950 27.0 29.9 91 29.9 29.7 102 ----- ----- Basin wide percent of average 91 108 UPPER GREEN RIVER BIG SANDY OPENING 9100 17.2 15.1 114 16.0 17.2 93 BLIND BULL SUM 8650 -M 30.5 * -M 25.2 * EAST RIM DIVIDE 7930 14.4 14.6 98 14.9 16.0 93 ELKHART PARK G.S. 9400 14.5 14.5 100 15.1 16.9 90 GROS VENTRE SUMMIT 8775 -M 16.0 * -M 16.9 * KENDALL R.S. 7740 15.0 14.0 108 16.7 16.4 102 LOOMIS PARK 8240 -M 17.4 * -M 19.9 * NEW FORK LAKE 8340 12.7 11.1 115 12.1 15.2 80 SNIDER BASIN 8250 18.2 15.4 119 18.4 16.0 116 SPRING CREEK DIVIDE 9000 31.4 28.9 109 29.0 28.9 101 TRIPLE PEAK 8500 31.0 26.5 117 31.2 32.5 96 ----- ----- Basin wide percent of average 111 97 LOWER GREEN RIVER HAMS FORK 7840 14.5 9.1 160 12.2 14.1 87 HEWINTA 9500 12.5 10.4 121 14.9 14.0 107 HICKERSON PARK 9150 6.5 6.8 96 10.2 10.2 100 HOLE-IN-ROCK 9150 6.5 6.5 100 10.7 10.2 105 INDIAN CREEK 9425 31.4 29.9 106 26.2 27.4 96 KELLEY R.S. 8180 17.5 17.5 100 19.2 19.7 98 STEEL CREEK PARK 10100 15.5 17.4 90 17.4 13.6 128 ----- ----- Basin wide percent of average 108 102 UPPER BEAR RIVER BUG LAKE 7950 23.7 20.7 115 21.4 20.4 105 HAYDEN FORK 9400 15.5 13.7 114 21.2 20.2 106 KELLEY R.S. 8180 17.5 17.5 100 19.2 19.7 98 LILY LAKE 9050 12.5 13.2 95 18.7 15.6 120 MONTE CRISTO 8960 27.9 29.7 94 27.5 26.9 103 SALT RIVER SUMMIT 7600 16.0 14.2 113 18.9 17.9 107 TRIAL LAKE 9960 21.5 25.7 84 22.7 25.2 91 ----- ----- Basin wide percent of average 100 103 ----------------------------------------------------------------------------- -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.