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: APRIL 12 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 24.4 16.4 149 28.4 23.7 120 COTTONWOOD CREEK 7600 26.5 23.7 113 29.4 26.7 111 GRANITE CREEK 6770 22.4 18.2 124 23.7 25.2 95 GRASSY LAKE 7265 44.2 37.5 118 42.4 39.5 108 GROS VENTRE SUMMIT 8775 17.0 16.0 107 16.7 17.0 98 LEWIS LAKE DIVIDE 7860 41.9 36.7 115 41.3 40.3 103 PHILLIPS BENCH 8200 34.3 30.7 112 33.3 31.9 105 SALT RIVER SUMMIT 7600 17.0 14.0 122 19.4 18.0 108 SNAKE RIVER STATION 6920 22.5 18.7 121 26.5 27.7 96 SPRING CREEK DIVIDE 9000 32.3 29.2 111 29.5 29.2 102 THUMB DIVIDE 7980 -M 17.4 * -M 22.2 * TOGWOTEE PASS 9580 -M 26.7 * 30.5 30.2 102 TWO OCEAN PLATEAU 9360 37.9 26.7 142 31.9 32.8 98 WILLOW CREEK 8450 35.7 31.5 114 39.3 34.3 115 ----- ----- Basin wide percent of average 120 105 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 26.9 25.2 107 24.2 19.4 125 BLACK BEAR 7950 51.9 39.9 131 -M 43.3 * CANYON 7940 18.9 13.5 140 20.2 15.1 134 FISHER CREEK 9100 41.3 37.7 110 37.8 39.0 97 MADISON PLATEAU 7750 -M 25.5 * 33.7 27.9 121 NORTHEAST ENTRANCE 7350 13.5 9.1 148 14.6 12.7 115 PARKER PEAK 9400 25.2 23.0 110 -M 16.7 * SYLVAN LAKE 8420 27.5 23.7 117 29.2 20.5 142 THUMB DIVIDE 7980 -M 17.4 * -M 22.2 * TWO OCEAN PLATEAU 9360 37.9 26.7 142 31.9 32.8 98 WHISKEY CREEK 6800 -M 18.2 * -M 23.2 * WHITE MILL 8700 28.9 25.7 113 25.7 30.2 85 WOLVERINE 7650 13.0 11.9 111 13.1 13.7 96 ----- ----- Basin wide percent of average 121 109 WIND RIVER BURROUGHS CREEK 8750 17.7 15.4 116 19.2 17.7 108 COLD SPRINGS 9630 9.7 8.7 112 13.2 11.6 114 DEER PARK 9700 18.4 -M * 23.9 -M * HOBBS PARK 10100 19.4 16.4 119 17.9 15.5 117 LITTLE WARM 9620 15.9 13.1 121 17.4 14.5 120 SOUTH PASS 9040 19.7 17.4 113 20.9 18.4 114 ST. LAWRENCE ALT 8620 7.5 7.3 103 11.5 11.1 104 TOGWOTEE PASS 9580 -M 26.7 * 30.5 30.2 102 TOWNSEND CREEK 8700 11.5 10.4 111 14.7 13.7 108 ----- ----- Basin wide percent of average 115 110 BIGHORN BASIN BALD MTN. 9375 21.2 22.0 96 19.4 18.7 104 BEAR TRAP MEADOW 7900 4.3 7.0 61 10.5 9.1 115 BLACKWATER 9780 31.9 24.4 132 26.4 19.2 139 BONE SPRINGS DIV 9350 19.4 17.9 109 18.0 16.4 111 EVENING STAR 9200 34.5 28.9 120 35.8 23.9 150 GRAVE SPRINGS 8550 10.5 10.5 100 13.2 10.7 124 KIRWIN 9550 13.7 11.0 126 15.4 11.9 130 MARQUETTE 8760 10.0 8.6 117 10.7 11.0 98 MIDDLE POWDER 7760 15.6 13.5 117 18.9 13.0 146 OWL CREEK 8975 7.3 4.8 154 7.3 7.0 106 POWDER RIVER PASS 9480 12.7 11.5 111 15.7 12.7 124 SHELL CREEK 9580 17.7 16.0 111 16.2 14.2 115 SYLVAN LAKE 8420 27.5 23.7 117 29.2 20.5 142 SYLVAN ROAD 8120 -M 11.2 * -M 17.2 * TIMBER CREEK 7950 6.0 6.6 90 8.0 8.2 97 YOUNTS PEAK 8350 22.2 18.2 123 19.9 17.7 113 ----- ----- Basin wide percent of average 114 124 SHOSHONE RIVER BLACKWATER 9780 31.9 24.4 132 26.4 19.2 139 EVENING STAR 9200 34.5 28.9 120 35.8 23.9 150 KIRWIN 9550 13.7 11.0 126 15.4 11.9 130 MARQUETTE 8760 10.0 8.6 117 10.7 11.0 98 SYLVAN LAKE 8420 27.5 23.7 117 29.2 20.5 142 SYLVAN ROAD 8120 -M 11.2 * -M 17.2 * YOUNTS PEAK 8350 22.2 18.2 123 19.9 17.7 113 ----- ----- Basin wide percent of average 123 132 POWDER-TONGUE BEAR TRAP MEADOW 7900 4.3 7.0 61 10.5 9.1 115 BIG GOOSE 7990 8.6 -M * 12.4 -M * BONE SPRINGS DIV 9350 19.4 17.9 109 18.0 16.4 111 BURGESS JUNCTION 7880 11.0 12.7 87 12.5 12.6 100 CLOUD PEAK RESERVOIR 9860 18.0 16.4 110 16.4 14.7 111 DOME LAKE 8880 -M 14.6 * 12.6 14.5 88 GRAVE SPRINGS 8550 10.5 10.5 100 13.2 10.7 124 HANSEN SAWMILL 8760 5.1 7.5 69 9.4 8.9 106 MIDDLE POWDER 7760 15.6 13.5 117 18.9 13.0 146 POWDER RIVER PASS 9480 12.7 11.5 111 15.7 12.7 124 SUCKER CREEK 8880 12.4 13.1 94 15.0 14.5 104 TIE CREEK 6870 -M -M * -M 12.1 * ----- ----- Basin wide percent of average 99 112 BELLE FOURCHE BLIND PARK 6890 7.0 11.5 61 16.9 11.5 149 NORTH RAPID CREEK 6130 6.8 -M * 14.5 -M * WARREN PEAK 6520 12.5 11.5 108 11.6 9.0 131 ----- ----- Basin wide percent of average 84 141 UPPER N. PLATTE RIVER COLUMBINE 9400 19.0 24.7 78 23.4 25.9 90 DIVIDE PEAK 8800 21.5 21.7 100 26.5 24.5 109 ELK RIVER 8700 17.5 20.4 86 23.9 20.4 118 JOE WRIGHT 10120 21.4 23.9 90 27.7 27.0 103 NORTH FRENCH CREEK 10100 33.7 27.7 122 31.9 25.2 127 OLD BATTLE 10000 32.0 35.2 92 38.7 32.3 120 SOUTH BRUSH CREEK 8400 11.6 13.1 89 20.7 17.9 116 TOWER 10500 47.3 48.3 98 40.8 38.8 105 WEBBER SPRINGS 9200 20.0 28.7 70 28.0 27.2 103 WILLOW CREEK PASS 9540 12.6 13.2 96 12.9 13.7 94 ----- ----- Basin wide percent of average 93 109 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 16.0 28.5 56 23.5 21.2 112 CASPER MTN. 7900 13.2 18.5 72 18.2 15.9 116 DEADMAN HILL 10220 16.9 17.7 97 17.9 18.4 97 DEER PARK 9700 18.4 -M * 23.9 -M * LAPRELE CREEK 8320 -M 10.2 * 16.2 13.0 126 RENO HILL 8400 16.0 15.4 104 20.7 20.4 101 ROACH 9700 15.5 18.0 87 20.5 22.9 90 SAND LAKE 10080 37.8 35.3 108 30.5 22.0 139 SOUTH PASS 9040 19.7 17.4 113 20.9 18.4 114 WINDY PEAK 7840 7.6 9.2 83 14.1 10.5 135 ----- ----- Basin wide percent of average 90 113 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 12.7 11.0 116 19.0 16.5 116 DIVIDE PEAK 8800 21.5 21.7 100 26.5 24.5 109 OLD BATTLE 10000 32.0 35.2 92 38.7 32.3 120 SANDSTONE RS 8150 14.1 15.4 93 22.4 20.4 110 WHISKEY PARK 8950 29.5 30.4 98 32.0 30.4 106 ----- ----- Basin wide percent of average 97 112 UPPER GREEN RIVER BIG SANDY OPENING 9100 17.0 15.4 112 16.2 17.4 94 BLIND BULL SUM 8650 28.7 30.9 94 23.4 25.5 92 EAST RIM DIVIDE 7930 14.5 14.9 98 15.0 16.2 92 ELKHART PARK G.S. 9400 15.0 14.9 102 15.7 17.0 93 GROS VENTRE SUMMIT 8775 17.0 16.0 107 16.7 17.0 98 KENDALL R.S. 7740 16.2 13.5 120 17.2 16.7 104 LOOMIS PARK 8240 -M 17.2 * 21.2 20.2 105 NEW FORK LAKE 8340 13.4 11.0 123 12.6 15.5 82 SNIDER BASIN 8250 18.5 15.5 121 18.7 16.2 116 SPRING CREEK DIVIDE 9000 32.3 29.2 111 29.5 29.2 102 TRIPLE PEAK 8500 31.4 26.7 118 31.9 33.0 97 ----- ----- Basin wide percent of average 109 98 LOWER GREEN RIVER HAMS FORK 7840 14.7 7.3 205 12.5 14.4 87 HEWINTA 9500 13.5 9.6 141 15.4 14.4 107 HICKERSON PARK 9150 6.0 6.8 90 10.5 10.6 100 HOLE-IN-ROCK 9150 7.3 6.3 115 11.0 10.6 104 INDIAN CREEK 9425 32.2 30.2 107 26.9 27.7 98 KELLEY R.S. 8180 18.2 17.7 103 20.0 20.0 100 STEEL CREEK PARK 10100 16.0 17.7 90 17.9 14.1 127 ----- ----- Basin wide percent of average 113 103 UPPER BEAR RIVER BUG LAKE 7950 24.0 20.4 119 21.7 20.9 105 HAYDEN FORK 9400 16.2 12.1 134 21.7 20.7 106 KELLEY R.S. 8180 18.2 17.7 103 20.0 20.0 100 LILY LAKE 9050 13.1 13.1 100 19.0 16.0 119 MONTE CRISTO 8960 28.4 29.5 96 28.2 27.4 103 SALT RIVER SUMMIT 7600 17.0 14.0 122 19.4 18.0 108 TRIAL LAKE 9960 22.2 25.9 87 23.4 25.7 92 ----- ----- Basin wide percent of average 105 104 ----------------------------------------------------------------------------- -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.