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: MAY 3 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 15.5 10.0 157 29.7 25.4 117 COTTONWOOD CREEK 7600 22.2 19.2 116 32.8 28.4 116 GRANITE CREEK 6770 16.9 12.2 138 26.9 27.0 100 GRASSY LAKE 7265 39.3 33.0 119 46.8 42.3 111 GROS VENTRE SUMMIT 8775 16.2 13.5 121 18.2 18.4 100 LEWIS LAKE DIVIDE 7860 39.2 33.8 116 43.8 42.9 102 PHILLIPS BENCH 8200 35.7 29.0 123 35.9 33.9 106 SALT RIVER SUMMIT 7600 13.7 9.4 148 21.4 19.4 110 SNAKE RIVER STATION 6920 14.0 15.7 89 28.7 29.7 97 SPRING CREEK DIVIDE 9000 36.4 29.2 126 33.9 31.0 110 THUMB DIVIDE 7980 19.2 14.6 132 25.2 23.9 106 TOGWOTEE PASS 9580 -M 28.0 * 32.9 32.3 103 TWO OCEAN PLATEAU 9360 39.8 27.5 145 35.0 35.0 100 WILLOW CREEK 8450 30.7 31.4 98 44.4 36.5 122 ----- ----- Basin wide percent of average 122 107 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 27.9 25.9 108 27.2 21.5 127 BLACK BEAR 7950 -M 39.4 * 50.5 46.8 108 CANYON 7940 15.0 10.4 145 21.0 16.5 128 FISHER CREEK 9100 -M 38.7 * 41.5 42.7 98 MADISON PLATEAU 7750 -M 23.2 * 35.7 30.2 118 NORTHEAST ENTRANCE 7350 5.0 5.5 91 16.4 14.1 116 PARKER PEAK 9400 26.7 23.7 114 -M 18.5 * SYLVAN LAKE 8420 24.7 23.4 106 31.4 22.7 139 THUMB DIVIDE 7980 19.2 14.6 132 25.2 23.9 106 TWO OCEAN PLATEAU 9360 39.8 27.5 145 35.0 35.0 100 WHISKEY CREEK 6800 19.7 14.5 137 27.4 25.2 109 WHITE MILL 8700 30.4 26.2 116 28.4 32.9 87 WOLVERINE 7650 7.0 7.5 95 15.0 15.5 98 ----- ----- Basin wide percent of average 121 109 WIND RIVER BURROUGHS CREEK 8750 18.7 12.1 155 21.5 19.7 110 COLD SPRINGS 9630 19.4 6.3 307 -M 13.4 * DEER PARK 9700 26.0 -M * 31.9 -M * HOBBS PARK 10100 29.2 17.9 163 -M 17.7 * LITTLE WARM 9620 -M 9.7 * 23.0 16.5 140 SOUTH PASS 9040 24.9 17.9 139 29.4 20.9 141 ST. LAWRENCE ALT 8620 14.1 5.0 283 20.5 12.7 162 TOGWOTEE PASS 9580 -M 28.0 * 32.9 32.3 103 TOWNSEND CREEK 8700 19.4 9.1 214 25.2 15.9 159 ----- ----- Basin wide percent of average 184 130 BIGHORN BASIN BALD MTN. 9375 21.9 24.2 91 21.9 21.2 104 BEAR TRAP MEADOW 7900 .9 3.9 21 14.1 11.0 130 BLACKWATER 9780 35.2 25.7 138 28.9 20.9 138 BONE SPRINGS DIV 9350 19.9 18.2 110 21.4 18.4 117 EVENING STAR 9200 37.0 30.9 121 39.4 26.2 151 GRAVE SPRINGS 8550 10.9 11.6 94 16.7 12.7 132 KIRWIN 9550 16.5 11.5 144 19.2 13.5 143 MARQUETTE 8760 16.9 8.5 199 18.7 13.9 136 MIDDLE POWDER 7760 15.5 14.7 106 21.9 15.1 146 OWL CREEK 8975 10.2 3.2 330 12.4 8.4 149 POWDER RIVER PASS 9480 11.5 10.0 117 19.2 15.0 129 SHELL CREEK 9580 17.5 17.0 103 18.2 16.2 112 SYLVAN LAKE 8420 24.7 23.4 106 31.4 22.7 139 SYLVAN ROAD 8120 10.7 7.5 145 21.5 18.9 114 TIMBER CREEK 7950 10.0 5.5 181 15.1 10.4 147 YOUNTS PEAK 8350 21.5 18.0 120 21.2 19.5 109 ----- ----- Basin wide percent of average 121 130 SHOSHONE RIVER BLACKWATER 9780 35.2 25.7 138 28.9 20.9 138 EVENING STAR 9200 37.0 30.9 121 39.4 26.2 151 KIRWIN 9550 16.5 11.5 144 19.2 13.5 143 MARQUETTE 8760 16.9 8.5 199 18.7 13.9 136 SYLVAN LAKE 8420 24.7 23.4 106 31.4 22.7 139 SYLVAN ROAD 8120 10.7 7.5 145 21.5 18.9 114 YOUNTS PEAK 8350 21.5 18.0 120 21.2 19.5 109 ----- ----- Basin wide percent of average 130 134 POWDER-TONGUE BEAR TRAP MEADOW 7900 .9 3.9 21 14.1 11.0 130 BIG GOOSE 7990 9.5 -M * 16.7 -M * BONE SPRINGS DIV 9350 19.9 18.2 110 21.4 18.4 117 BURGESS JUNCTION 7880 10.4 13.2 79 15.5 14.7 106 CLOUD PEAK RESERVOIR 9860 23.2 17.5 133 22.9 17.4 132 DOME LAKE 8880 -M 14.5 * 16.2 16.7 98 GRAVE SPRINGS 8550 10.9 11.6 94 16.7 12.7 132 HANSEN SAWMILL 8760 5.5 6.5 84 15.0 10.5 143 MIDDLE POWDER 7760 15.5 14.7 106 21.9 15.1 146 POWDER RIVER PASS 9480 11.5 10.0 117 19.2 15.0 129 SUCKER CREEK 8880 13.7 13.5 103 19.2 16.9 114 TIE CREEK 6870 -M -M * -M 14.1 * ----- ----- Basin wide percent of average 102 123 BELLE FOURCHE BLIND PARK 6890 .0 9.0 0 17.9 14.1 127 NORTH RAPID CREEK 6130 .6 -M * 16.4 -M * WARREN PEAK 6520 4.5 9.0 51 13.0 10.5 124 ----- ----- Basin wide percent of average 26 126 UPPER N. PLATTE RIVER COLUMBINE 9400 16.5 21.0 79 27.7 28.4 98 DIVIDE PEAK 8800 20.9 18.4 114 30.2 27.7 110 ELK RIVER 8700 13.9 15.1 92 26.9 22.4 121 JOE WRIGHT 10120 22.9 24.7 94 31.2 30.7 102 NORTH FRENCH CREEK 10100 38.9 29.2 134 37.7 28.4 133 OLD BATTLE 10000 37.9 38.2 100 43.9 36.0 122 SOUTH BRUSH CREEK 8400 9.6 10.0 96 23.0 20.9 111 TOWER 10500 55.8 51.2 110 46.8 43.8 107 WEBBER SPRINGS 9200 21.7 25.4 86 32.0 30.9 104 WILLOW CREEK PASS 9540 15.5 13.2 118 15.0 15.6 97 ----- ----- Basin wide percent of average 104 111 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 28.2 28.4 99 30.5 24.2 127 CASPER MTN. 7900 12.6 16.9 75 21.2 19.2 111 DEADMAN HILL 10220 21.9 19.2 115 23.0 21.4 108 DEER PARK 9700 26.0 -M * 31.9 -M * LAPRELE CREEK 8320 .0 6.0 0 19.9 15.0 133 RENO HILL 8400 15.0 12.9 118 24.7 22.7 109 ROACH 9700 19.4 17.9 109 25.4 26.2 97 SAND LAKE 10080 46.3 37.0 125 37.0 25.2 148 SOUTH PASS 9040 24.9 17.9 139 29.4 20.9 141 WINDY PEAK 7840 5.8 7.3 80 17.9 12.5 143 ----- ----- Basin wide percent of average 107 123 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 2.2 4.3 50 21.9 18.7 118 DIVIDE PEAK 8800 20.9 18.4 114 30.2 27.7 110 OLD BATTLE 10000 37.9 38.2 100 43.9 36.0 122 SANDSTONE RS 8150 6.3 8.9 71 24.7 23.2 107 WHISKEY PARK 8950 31.2 29.0 108 36.0 34.3 105 ----- ----- Basin wide percent of average 100 113 UPPER GREEN RIVER BIG SANDY OPENING 9100 16.0 13.5 120 -M 18.7 * BLIND BULL SUM 8650 32.3 22.7 142 26.7 27.2 99 EAST RIM DIVIDE 7930 14.6 14.6 100 17.2 17.5 98 ELKHART PARK G.S. 9400 16.0 13.5 119 18.2 18.4 99 GROS VENTRE SUMMIT 8775 16.2 13.5 121 18.2 18.4 100 KENDALL R.S. 7740 11.6 9.1 128 19.2 17.9 108 LOOMIS PARK 8240 -M 14.6 * 23.7 21.7 110 NEW FORK LAKE 8340 12.0 8.7 138 15.1 16.7 91 SNIDER BASIN 8250 19.9 12.5 160 22.0 17.4 127 SPRING CREEK DIVIDE 9000 36.4 29.2 126 33.9 31.0 110 TRIPLE PEAK 8500 31.7 24.5 130 36.7 35.3 104 ----- ----- Basin wide percent of average 128 105 LOWER GREEN RIVER HAMS FORK 7840 10.0 5.0 203 17.2 15.5 112 HEWINTA 9500 12.6 4.6 274 18.0 16.5 110 HICKERSON PARK 9150 5.8 2.7 224 13.9 12.5 111 HOLE-IN-ROCK 9150 8.6 2.2 410 14.2 12.5 114 INDIAN CREEK 9425 37.3 28.4 132 32.3 29.5 110 KELLEY R.S. 8180 16.7 14.4 117 23.2 21.5 108 STEEL CREEK PARK 10100 20.4 18.7 110 21.7 16.4 133 ----- ----- Basin wide percent of average 148 113 UPPER BEAR RIVER BUG LAKE 7950 25.4 15.2 167 27.7 22.9 122 HAYDEN FORK 9400 13.7 5.8 237 25.7 23.4 111 KELLEY R.S. 8180 16.7 14.4 117 23.2 21.5 108 LILY LAKE 9050 13.1 8.4 158 22.7 18.4 125 MONTE CRISTO 8960 37.0 25.7 145 34.8 30.7 114 SALT RIVER SUMMIT 7600 13.7 9.4 148 21.4 19.4 110 TRIAL LAKE 9960 26.2 23.7 111 28.7 28.7 100 ----- ----- Basin wide percent of average 143 112 ----------------------------------------------------------------------------- -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.