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 24 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 20.9 13.1 159 28.9 24.7 117 COTTONWOOD CREEK 7600 24.4 21.5 114 30.4 27.7 110 GRANITE CREEK 6770 20.0 15.1 133 24.2 26.2 93 GRASSY LAKE 7265 43.0 35.8 121 44.7 41.2 109 GROS VENTRE SUMMIT 8775 16.5 15.0 111 17.0 17.7 97 LEWIS LAKE DIVIDE 7860 41.4 35.5 117 42.7 41.8 103 PHILLIPS BENCH 8200 35.0 30.2 116 34.0 33.0 104 SALT RIVER SUMMIT 7600 15.5 12.2 127 19.7 18.9 105 SNAKE RIVER STATION 6920 19.9 17.4 115 27.9 28.9 97 SPRING CREEK DIVIDE 9000 33.4 29.7 113 31.2 30.2 103 THUMB DIVIDE 7980 -M 16.2 * -M 23.2 * TOGWOTEE PASS 9580 -M 27.9 * 31.5 31.4 101 TWO OCEAN PLATEAU 9360 40.7 27.2 150 34.2 34.0 101 WILLOW CREEK 8450 32.8 31.9 103 40.9 35.5 116 ----- ----- Basin wide percent of average 121 105 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 28.9 25.9 113 25.9 20.5 127 BLACK BEAR 7950 -M 40.0 * 48.7 45.3 108 CANYON 7940 17.9 12.1 148 20.7 16.0 130 FISHER CREEK 9100 39.7 38.4 104 39.2 41.2 96 MADISON PLATEAU 7750 -M 24.7 * 34.3 29.2 118 NORTHEAST ENTRANCE 7350 10.4 7.3 142 15.0 13.5 112 PARKER PEAK 9400 27.7 23.5 118 -M 17.7 * SYLVAN LAKE 8420 28.0 23.9 118 30.7 21.7 142 THUMB DIVIDE 7980 -M 16.2 * -M 23.2 * TWO OCEAN PLATEAU 9360 40.7 27.2 150 34.2 34.0 101 WHISKEY CREEK 6800 22.0 16.7 133 26.2 24.4 108 WHITE MILL 8700 29.4 26.2 113 26.5 31.7 84 WOLVERINE 7650 12.5 9.9 128 14.1 14.7 96 ----- ----- Basin wide percent of average 122 108 WIND RIVER BURROUGHS CREEK 8750 18.0 14.0 129 19.7 18.9 105 COLD SPRINGS 9630 -M 7.8 * -M 12.6 * DEER PARK 9700 23.2 -M * -M -M * HOBBS PARK 10100 -M 17.4 * 22.4 16.7 135 LITTLE WARM 9620 17.4 11.9 148 19.7 15.7 125 SOUTH PASS 9040 -M 17.9 * -M 19.9 * ST. LAWRENCE ALT 8620 -M 6.3 * -M 12.0 * TOGWOTEE PASS 9580 -M 27.9 * 31.5 31.4 101 TOWNSEND CREEK 8700 -M 10.0 * -M 15.0 * ----- ----- Basin wide percent of average 138* 114* BIGHORN BASIN BALD MTN. 9375 22.9 23.4 98 21.0 20.2 105 BEAR TRAP MEADOW 7900 2.8 5.5 50 12.7 10.1 126 BLACKWATER 9780 34.3 25.4 136 27.9 20.2 139 BONE SPRINGS DIV 9350 21.2 18.4 116 20.5 17.5 118 EVENING STAR 9200 36.4 30.2 121 37.9 25.2 151 GRAVE SPRINGS 8550 11.4 11.2 101 15.1 11.9 128 KIRWIN 9550 15.2 11.5 133 17.4 12.9 136 MARQUETTE 8760 15.2 8.7 175 16.2 12.6 128 MIDDLE POWDER 7760 18.2 14.4 128 20.7 14.2 146 OWL CREEK 8975 8.6 4.0 215 9.5 7.8 123 POWDER RIVER PASS 9480 13.5 11.0 123 17.9 14.0 128 SHELL CREEK 9580 19.0 16.7 114 17.7 15.4 116 SYLVAN LAKE 8420 28.0 23.9 118 30.7 21.7 142 SYLVAN ROAD 8120 16.4 9.2 179 21.4 18.2 118 TIMBER CREEK 7950 9.5 6.3 150 12.5 9.5 132 YOUNTS PEAK 8350 22.2 18.4 121 20.7 18.7 111 ----- ----- Basin wide percent of average 124 128 SHOSHONE RIVER BLACKWATER 9780 34.3 25.4 136 27.9 20.2 139 EVENING STAR 9200 36.4 30.2 121 37.9 25.2 151 KIRWIN 9550 15.2 11.5 133 17.4 12.9 136 MARQUETTE 8760 15.2 8.7 175 16.2 12.6 128 SYLVAN LAKE 8420 28.0 23.9 118 30.7 21.7 142 SYLVAN ROAD 8120 16.4 9.2 179 21.4 18.2 118 YOUNTS PEAK 8350 22.2 18.4 121 20.7 18.7 111 ----- ----- Basin wide percent of average 132 133 POWDER-TONGUE BEAR TRAP MEADOW 7900 2.8 5.5 50 12.7 10.1 126 BIG GOOSE 7990 11.0 -M * 15.5 -M * BONE SPRINGS DIV 9350 21.2 18.4 116 20.5 17.5 118 BURGESS JUNCTION 7880 12.9 13.4 97 15.0 13.9 108 CLOUD PEAK RESERVOIR 9860 21.4 17.4 123 20.2 16.4 124 DOME LAKE 8880 -M 15.0 * 15.2 15.7 97 GRAVE SPRINGS 8550 11.4 11.2 101 15.1 11.9 128 HANSEN SAWMILL 8760 6.5 7.3 88 12.5 9.9 128 MIDDLE POWDER 7760 18.2 14.4 128 20.7 14.2 146 POWDER RIVER PASS 9480 13.5 11.0 123 17.9 14.0 128 SUCKER CREEK 8880 14.9 13.6 109 18.0 15.9 114 TIE CREEK 6870 -M -M * -M 13.2 * ----- ----- Basin wide percent of average 110 121 BELLE FOURCHE BLIND PARK 6890 3.8 10.5 37 17.7 13.0 137 NORTH RAPID CREEK 6130 5.0 -M * 16.0 -M * WARREN PEAK 6520 11.0 10.5 104 12.7 9.9 130 ----- ----- Basin wide percent of average 71 134 UPPER N. PLATTE RIVER COLUMBINE 9400 18.2 23.2 79 26.0 27.4 96 DIVIDE PEAK 8800 22.2 20.4 109 28.4 26.4 108 ELK RIVER 8700 16.0 18.2 89 25.5 21.5 119 JOE WRIGHT 10120 22.9 24.5 94 29.4 29.2 102 NORTH FRENCH CREEK 10100 36.3 28.9 126 34.7 27.0 129 OLD BATTLE 10000 34.8 37.3 94 41.0 34.5 119 SOUTH BRUSH CREEK 8400 10.1 11.7 87 21.7 19.7 111 TOWER 10500 52.3 50.3 105 44.2 41.7 107 WEBBER SPRINGS 9200 21.7 27.2 80 30.2 29.4 103 WILLOW CREEK PASS 9540 14.4 13.5 106 13.9 14.9 94 ----- ----- Basin wide percent of average 98 109 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 20.2 29.0 70 28.0 22.9 123 CASPER MTN. 7900 15.4 18.4 84 20.5 17.7 116 DEADMAN HILL 10220 20.0 18.7 108 20.9 20.2 104 DEER PARK 9700 23.2 -M * -M -M * LAPRELE CREEK 8320 -M 8.0 * 18.4 14.1 130 RENO HILL 8400 17.9 14.5 125 23.4 21.7 108 ROACH 9700 18.7 18.2 103 24.2 24.9 98 SAND LAKE 10080 43.2 36.7 118 34.3 23.9 144 SOUTH PASS 9040 -M 17.9 * -M 19.9 * WINDY PEAK 7840 8.0 8.6 94 15.9 11.6 137 ----- ----- Basin wide percent of average 100 119 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 8.1 7.5 109 20.2 17.9 113 DIVIDE PEAK 8800 22.2 20.4 109 28.4 26.4 108 OLD BATTLE 10000 34.8 37.3 94 41.0 34.5 119 SANDSTONE RS 8150 11.1 12.4 91 23.2 22.0 106 WHISKEY PARK 8950 29.9 30.2 100 33.3 32.8 102 ----- ----- Basin wide percent of average 99 110 UPPER GREEN RIVER BIG SANDY OPENING 9100 16.2 14.6 111 16.7 18.2 93 BLIND BULL SUM 8650 30.2 26.4 115 23.7 26.4 90 EAST RIM DIVIDE 7930 14.5 15.0 97 15.0 16.9 89 ELKHART PARK G.S. 9400 14.7 14.5 102 16.2 17.9 91 GROS VENTRE SUMMIT 8775 16.5 15.0 111 17.0 17.7 97 KENDALL R.S. 7740 14.2 11.7 122 17.7 17.4 103 LOOMIS PARK 8240 -M 16.0 * 21.5 21.0 103 NEW FORK LAKE 8340 12.5 10.0 126 13.0 16.2 81 SNIDER BASIN 8250 19.2 14.1 136 19.4 16.9 115 SPRING CREEK DIVIDE 9000 33.4 29.7 113 31.2 30.2 103 TRIPLE PEAK 8500 29.4 25.9 114 32.5 34.3 95 ----- ----- Basin wide percent of average 114 97 LOWER GREEN RIVER HAMS FORK 7840 12.6 5.8 218 14.7 15.0 99 HEWINTA 9500 11.5 7.0 165 16.4 15.6 105 HICKERSON PARK 9150 6.0 4.6 129 12.2 11.7 105 HOLE-IN-ROCK 9150 8.7 4.1 213 12.6 11.7 108 INDIAN CREEK 9425 34.7 29.7 117 29.2 28.7 102 KELLEY R.S. 8180 17.0 16.2 105 21.0 20.9 101 STEEL CREEK PARK 10100 17.2 18.5 93 19.2 15.5 125 ----- ----- Basin wide percent of average 126 106 UPPER BEAR RIVER BUG LAKE 7950 23.7 17.9 134 23.9 22.0 109 HAYDEN FORK 9400 12.4 8.5 145 22.7 22.2 103 KELLEY R.S. 8180 17.0 16.2 105 21.0 20.9 101 LILY LAKE 9050 12.2 10.6 116 20.2 17.4 117 MONTE CRISTO 8960 31.4 27.7 114 30.5 29.4 105 SALT RIVER SUMMIT 7600 15.5 12.2 127 19.7 18.9 105 TRIAL LAKE 9960 21.2 24.9 86 24.5 27.4 90 ----- ----- Basin wide percent of average 113 103 ----------------------------------------------------------------------------- -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.