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: MAY 1 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 17.0 10.7 159 29.4 25.2 117 COTTONWOOD CREEK 7600 23.0 20.0 116 32.4 28.2 115 GRANITE CREEK 6770 17.9 13.0 138 26.7 26.9 100 GRASSY LAKE 7265 41.3 33.9 122 46.0 41.9 110 GROS VENTRE SUMMIT 8775 16.9 14.0 121 18.2 18.2 100 LEWIS LAKE DIVIDE 7860 39.4 34.4 115 43.2 42.8 101 PHILLIPS BENCH 8200 36.8 29.5 125 35.8 33.8 106 SALT RIVER SUMMIT 7600 14.5 11.0 133 21.2 19.2 110 SNAKE RIVER STATION 6920 15.5 16.4 94 28.4 29.4 97 SPRING CREEK DIVIDE 9000 36.0 29.7 122 33.4 30.9 109 THUMB DIVIDE 7980 20.4 15.1 136 25.0 23.7 106 TOGWOTEE PASS 9580 -M 28.4 * 32.8 31.9 103 TWO OCEAN PLATEAU 9360 39.3 27.7 142 34.8 34.8 100 WILLOW CREEK 8450 31.7 31.9 100 43.7 36.3 121 ----- ----- Basin wide percent of average 122 107 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 27.7 26.0 107 27.2 21.2 129 BLACK BEAR 7950 -M 39.8 * 49.7 46.5 107 CANYON 7940 16.2 11.0 148 21.0 16.4 129 FISHER CREEK 9100 -M 38.8 * 41.3 42.3 98 MADISON PLATEAU 7750 -M 23.9 * 34.8 29.9 117 NORTHEAST ENTRANCE 7350 6.3 6.0 106 16.2 14.0 116 PARKER PEAK 9400 27.4 23.7 116 -M 18.2 * SYLVAN LAKE 8420 25.4 23.9 107 31.2 22.4 140 THUMB DIVIDE 7980 20.4 15.1 136 25.0 23.7 106 TWO OCEAN PLATEAU 9360 39.3 27.7 142 34.8 34.8 100 WHISKEY CREEK 6800 20.5 15.2 135 26.7 24.9 108 WHITE MILL 8700 30.2 26.4 115 28.2 32.8 86 WOLVERINE 7650 8.9 8.1 109 15.1 15.2 100 ----- ----- Basin wide percent of average 122 109 WIND RIVER BURROUGHS CREEK 8750 19.2 13.0 147 21.4 19.4 110 COLD SPRINGS 9630 -M 6.8 * -M 13.1 * DEER PARK 9700 25.9 -M * 31.7 -M * HOBBS PARK 10100 29.2 18.0 162 25.9 17.4 149 LITTLE WARM 9620 -M 10.5 * 23.0 16.4 141 SOUTH PASS 9040 25.0 18.2 138 29.2 20.7 142 ST. LAWRENCE ALT 8620 14.6 5.5 266 20.4 12.5 164 TOGWOTEE PASS 9580 -M 28.4 * 32.8 31.9 103 TOWNSEND CREEK 8700 19.7 9.5 208 25.0 15.5 162 ----- ----- Basin wide percent of average 168 133 BIGHORN BASIN BALD MTN. 9375 21.7 24.2 90 21.7 20.9 104 BEAR TRAP MEADOW 7900 1.9 4.3 42 14.1 10.6 134 BLACKWATER 9780 35.3 25.7 137 28.7 20.7 139 BONE SPRINGS DIV 9350 20.4 18.4 111 21.4 18.2 118 EVENING STAR 9200 37.3 30.9 121 39.3 25.9 152 GRAVE SPRINGS 8550 11.4 11.6 98 16.7 12.5 133 KIRWIN 9550 16.9 11.7 144 19.2 13.5 144 MARQUETTE 8760 17.4 8.6 203 18.7 13.5 138 MIDDLE POWDER 7760 16.5 15.0 111 21.7 15.0 146 OWL CREEK 8975 11.0 3.4 324 12.2 8.1 151 POWDER RIVER PASS 9480 13.1 10.5 125 19.0 14.7 130 SHELL CREEK 9580 18.0 17.0 106 18.0 16.0 113 SYLVAN LAKE 8420 25.4 23.9 107 31.2 22.4 140 SYLVAN ROAD 8120 12.0 8.0 149 21.4 18.7 115 TIMBER CREEK 7950 10.5 6.0 174 15.1 10.0 152 YOUNTS PEAK 8350 21.7 18.4 118 21.2 19.4 110 ----- ----- Basin wide percent of average 123 131 SHOSHONE RIVER BLACKWATER 9780 35.3 25.7 137 28.7 20.7 139 EVENING STAR 9200 37.3 30.9 121 39.3 25.9 152 KIRWIN 9550 16.9 11.7 144 19.2 13.5 144 MARQUETTE 8760 17.4 8.6 203 18.7 13.5 138 SYLVAN LAKE 8420 25.4 23.9 107 31.2 22.4 140 SYLVAN ROAD 8120 12.0 8.0 149 21.4 18.7 115 YOUNTS PEAK 8350 21.7 18.4 118 21.2 19.4 110 ----- ----- Basin wide percent of average 131 134 POWDER-TONGUE BEAR TRAP MEADOW 7900 1.9 4.3 42 14.1 10.6 134 BIG GOOSE 7990 10.4 -M * 16.7 -M * BONE SPRINGS DIV 9350 20.4 18.4 111 21.4 18.2 118 BURGESS JUNCTION 7880 11.4 13.5 84 15.6 14.5 108 CLOUD PEAK RESERVOIR 9860 23.7 17.7 134 22.7 17.2 132 DOME LAKE 8880 -M 15.0 * 16.2 16.4 99 GRAVE SPRINGS 8550 11.4 11.6 98 16.7 12.5 133 HANSEN SAWMILL 8760 6.5 7.0 92 15.0 10.5 145 MIDDLE POWDER 7760 16.5 15.0 111 21.7 15.0 146 POWDER RIVER PASS 9480 13.1 10.5 125 19.0 14.7 130 SUCKER CREEK 8880 14.6 14.0 106 19.0 16.5 116 TIE CREEK 6870 -M -M * -M 14.0 * ----- ----- Basin wide percent of average 107 125 BELLE FOURCHE BLIND PARK 6890 .0 9.6 0 17.9 14.0 129 NORTH RAPID CREEK 6130 1.2 -M * 16.4 -M * WARREN PEAK 6520 7.0 9.6 72 13.1 10.5 126 ----- ----- Basin wide percent of average 36 128 UPPER N. PLATTE RIVER COLUMBINE 9400 16.4 22.2 74 27.0 28.2 96 DIVIDE PEAK 8800 21.2 19.4 110 29.7 27.4 109 ELK RIVER 8700 14.5 16.2 90 26.4 22.2 119 JOE WRIGHT 10120 22.7 24.7 92 30.9 30.4 102 NORTH FRENCH CREEK 10100 38.4 29.4 131 37.2 28.0 133 OLD BATTLE 10000 36.9 38.3 97 43.3 35.8 121 SOUTH BRUSH CREEK 8400 9.6 10.6 91 23.0 20.7 112 TOWER 10500 54.8 51.3 108 46.2 43.3 107 WEBBER SPRINGS 9200 21.4 26.0 83 31.4 30.7 103 WILLOW CREEK PASS 9540 15.0 13.5 112 14.5 15.5 93 ----- ----- Basin wide percent of average 100 110 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 -M 28.9 * 30.0 23.9 126 CASPER MTN. 7900 13.7 17.9 77 21.2 18.9 113 DEADMAN HILL 10220 20.9 19.2 109 22.4 21.2 106 DEER PARK 9700 25.9 -M * 31.7 -M * LAPRELE CREEK 8320 .0 6.3 0 19.7 14.7 135 RENO HILL 8400 15.9 13.5 118 24.4 22.4 109 ROACH 9700 19.4 18.2 107 24.9 25.9 96 SAND LAKE 10080 46.2 37.3 124 37.0 24.9 149 SOUTH PASS 9040 25.0 18.2 138 29.2 20.7 142 WINDY PEAK 7840 6.8 8.0 85 17.5 12.2 144 ----- ----- Basin wide percent of average 107 123 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 4.3 4.8 90 21.7 18.5 118 DIVIDE PEAK 8800 21.2 19.4 110 29.7 27.4 109 OLD BATTLE 10000 36.9 38.3 97 43.3 35.8 121 SANDSTONE RS 8150 8.2 10.0 83 24.5 23.0 107 WHISKEY PARK 8950 30.7 29.7 104 35.3 34.0 104 ----- ----- Basin wide percent of average 100 112 UPPER GREEN RIVER BIG SANDY OPENING 9100 16.7 14.0 119 18.2 18.5 98 BLIND BULL SUM 8650 32.5 22.7 144 26.4 26.9 98 EAST RIM DIVIDE 7930 15.0 15.0 101 17.2 17.4 99 ELKHART PARK G.S. 9400 16.2 14.0 116 17.9 18.2 99 GROS VENTRE SUMMIT 8775 16.9 14.0 121 18.2 18.2 100 KENDALL R.S. 7740 13.0 10.6 122 19.2 17.7 108 LOOMIS PARK 8240 -M 15.1 * 23.5 21.4 110 NEW FORK LAKE 8340 13.0 9.1 142 15.0 16.4 91 SNIDER BASIN 8250 20.4 13.0 157 21.9 17.2 127 SPRING CREEK DIVIDE 9000 36.0 29.7 122 33.4 30.9 109 TRIPLE PEAK 8500 32.0 25.0 129 36.3 35.0 104 ----- ----- Basin wide percent of average 127 104 LOWER GREEN RIVER HAMS FORK 7840 10.6 5.8 183 16.9 15.2 111 HEWINTA 9500 13.1 5.3 248 18.0 16.4 110 HICKERSON PARK 9150 6.1 2.9 211 13.7 12.5 111 HOLE-IN-ROCK 9150 9.0 2.3 387 14.1 12.5 114 INDIAN CREEK 9425 36.9 28.9 128 31.9 29.2 109 KELLEY R.S. 8180 16.9 15.0 113 22.9 21.4 107 STEEL CREEK PARK 10100 19.7 18.9 105 21.4 16.2 133 ----- ----- Basin wide percent of average 142 113 UPPER BEAR RIVER BUG LAKE 7950 25.2 16.0 158 27.0 22.7 119 HAYDEN FORK 9400 13.9 6.6 210 25.4 23.0 111 KELLEY R.S. 8180 16.9 15.0 113 22.9 21.4 107 LILY LAKE 9050 13.5 8.7 155 22.4 18.0 125 MONTE CRISTO 8960 35.8 26.2 137 34.2 30.4 113 SALT RIVER SUMMIT 7600 14.5 11.0 133 21.2 19.2 110 TRIAL LAKE 9960 25.2 24.0 106 27.9 28.4 99 ----- ----- Basin wide percent of average 135 111 ----------------------------------------------------------------------------- -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.