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: MAY 6 , 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 8.6 180 29.9 25.7 116 COTTONWOOD CREEK 7600 23.4 17.9 131 34.3 28.7 120 GRANITE CREEK 6770 16.0 11.0 145 26.9 27.4 99 GRASSY LAKE 7265 40.2 31.7 127 47.9 42.8 113 GROS VENTRE SUMMIT 8775 16.5 12.6 131 18.9 18.5 102 LEWIS LAKE DIVIDE 7860 39.7 32.8 122 44.5 43.4 103 PHILLIPS BENCH 8200 35.3 28.2 126 36.4 34.3 107 SALT RIVER SUMMIT 7600 13.6 7.0 195 21.7 19.7 111 SNAKE RIVER STATION 6920 13.9 14.7 94 29.2 30.0 98 SPRING CREEK DIVIDE 9000 37.2 28.4 131 34.7 31.4 111 THUMB DIVIDE 7980 -M 13.9 * -M 24.2 * TOGWOTEE PASS 9580 -M 27.5 * 33.3 32.5 103 TWO OCEAN PLATEAU 9360 40.9 27.2 151 35.4 35.3 101 WILLOW CREEK 8450 31.7 30.5 104 45.9 36.9 125 ----- ----- Basin wide percent of average 130 108 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 28.7 25.7 112 27.4 21.9 125 BLACK BEAR 7950 55.8 38.9 144 51.8 47.3 110 CANYON 7940 14.6 9.5 156 21.2 16.9 126 FISHER CREEK 9100 40.9 38.3 107 41.9 43.0 98 MADISON PLATEAU 7750 -M 22.2 * 36.7 30.5 121 NORTHEAST ENTRANCE 7350 5.0 4.8 103 16.5 14.5 115 PARKER PEAK 9400 27.2 23.4 117 -M 18.9 * SYLVAN LAKE 8420 24.2 22.7 107 32.0 23.0 140 THUMB DIVIDE 7980 -M 13.9 * -M 24.2 * TWO OCEAN PLATEAU 9360 40.9 27.2 151 35.4 35.3 101 WHISKEY CREEK 6800 19.9 13.2 151 28.4 25.4 112 WHITE MILL 8700 30.7 25.9 119 28.7 33.3 86 WOLVERINE 7650 6.0 6.3 96 15.4 15.7 98 ----- ----- Basin wide percent of average 125 110 WIND RIVER BURROUGHS CREEK 8750 18.7 10.9 173 21.5 20.0 108 COLD SPRINGS 9630 19.2 5.5 356 23.4 13.6 172 DEER PARK 9700 26.2 -M * 32.3 -M * HOBBS PARK 10100 29.5 17.7 167 27.2 17.9 152 LITTLE WARM 9620 19.9 8.7 229 23.2 16.9 138 SOUTH PASS 9040 25.2 17.7 143 29.9 21.2 141 ST. LAWRENCE ALT 8620 14.4 4.5 325 20.7 13.0 161 TOGWOTEE PASS 9580 -M 27.5 * 33.3 32.5 103 TOWNSEND CREEK 8700 19.9 8.4 239 25.5 16.2 159 ----- ----- Basin wide percent of average 201 136 BIGHORN BASIN BALD MTN. 9375 22.7 24.4 94 22.4 21.7 104 BEAR TRAP MEADOW 7900 1.4 3.3 40 14.9 11.2 133 BLACKWATER 9780 35.0 25.4 138 28.9 21.2 137 BONE SPRINGS DIV 9350 20.2 17.9 114 21.7 18.9 116 EVENING STAR 9200 37.0 30.7 121 39.8 26.7 150 GRAVE SPRINGS 8550 11.5 11.5 100 17.4 13.1 133 KIRWIN 9550 16.4 11.2 146 19.4 13.9 140 MARQUETTE 8760 17.0 8.4 205 18.9 14.2 133 MIDDLE POWDER 7760 17.2 14.6 118 23.2 15.5 151 OWL CREEK 8975 10.5 2.7 404 12.7 8.6 148 POWDER RIVER PASS 9480 12.4 9.0 137 20.2 15.4 132 SHELL CREEK 9580 18.0 17.0 106 19.0 16.7 115 SYLVAN LAKE 8420 24.2 22.7 107 32.0 23.0 140 SYLVAN ROAD 8120 10.2 6.6 155 21.9 19.2 114 TIMBER CREEK 7950 10.5 4.8 219 16.0 10.7 149 YOUNTS PEAK 8350 21.5 17.5 123 21.2 19.9 108 ----- ----- Basin wide percent of average 126 130 SHOSHONE RIVER BLACKWATER 9780 35.0 25.4 138 28.9 21.2 137 EVENING STAR 9200 37.0 30.7 121 39.8 26.7 150 KIRWIN 9550 16.4 11.2 146 19.4 13.9 140 MARQUETTE 8760 17.0 8.4 205 18.9 14.2 133 SYLVAN LAKE 8420 24.2 22.7 107 32.0 23.0 140 SYLVAN ROAD 8120 10.2 6.6 155 21.9 19.2 114 YOUNTS PEAK 8350 21.5 17.5 123 21.2 19.9 108 ----- ----- Basin wide percent of average 132 132 POWDER-TONGUE BEAR TRAP MEADOW 7900 1.4 3.3 40 14.9 11.2 133 BIG GOOSE 7990 10.1 -M * 17.5 -M * BONE SPRINGS DIV 9350 20.2 17.9 114 21.7 18.9 116 BURGESS JUNCTION 7880 10.9 12.7 86 16.0 15.0 107 CLOUD PEAK RESERVOIR 9860 24.4 17.2 142 23.9 17.9 134 DOME LAKE 8880 -M 13.5 * 16.9 17.2 99 GRAVE SPRINGS 8550 11.5 11.5 100 17.4 13.1 133 HANSEN SAWMILL 8760 5.6 6.0 95 15.7 10.9 146 MIDDLE POWDER 7760 17.2 14.6 118 23.2 15.5 151 POWDER RIVER PASS 9480 12.4 9.0 137 20.2 15.4 132 SUCKER CREEK 8880 14.0 12.7 111 19.9 17.2 116 TIE CREEK 6870 -M -M * -M 14.5 * ----- ----- Basin wide percent of average 112 125 BELLE FOURCHE BLIND PARK 6890 .0 8.0 0 18.4 14.6 127 NORTH RAPID CREEK 6130 .3 -M * 16.7 -M * WARREN PEAK 6520 3.3 8.0 42 -M 10.9 * ----- ----- Basin wide percent of average 21 127* UPPER N. PLATTE RIVER COLUMBINE 9400 17.4 19.4 91 28.5 28.7 100 DIVIDE PEAK 8800 22.0 16.9 131 30.9 27.9 111 ELK RIVER 8700 14.7 13.5 109 27.4 22.5 122 JOE WRIGHT 10120 24.2 24.4 99 32.4 31.2 105 NORTH FRENCH CREEK 10100 41.2 28.5 145 39.9 28.7 140 OLD BATTLE 10000 40.0 37.8 106 45.8 36.4 126 SOUTH BRUSH CREEK 8400 10.1 9.0 113 25.4 21.2 121 TOWER 10500 58.0 51.0 114 48.3 44.3 109 WEBBER SPRINGS 9200 22.5 24.2 94 33.3 31.2 107 WILLOW CREEK PASS 9540 16.0 12.5 128 15.2 16.0 96 ----- ----- Basin wide percent of average 113 114 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 29.0 27.5 106 31.9 24.4 131 CASPER MTN. 7900 13.7 15.5 89 22.7 19.5 116 DEADMAN HILL 10220 22.2 19.0 117 23.7 21.7 109 DEER PARK 9700 26.2 -M * 32.3 -M * LAPRELE CREEK 8320 .2 5.3 2 20.4 15.4 133 RENO HILL 8400 16.2 11.7 138 25.9 22.9 114 ROACH 9700 -M 17.4 * 25.7 26.7 97 SAND LAKE 10080 46.3 36.7 127 37.3 25.4 147 SOUTH PASS 9040 25.2 17.7 143 29.9 21.2 141 WINDY PEAK 7840 5.0 6.5 79 17.9 12.9 140 ----- ----- Basin wide percent of average 113 124 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 1.5 3.2 49 22.4 18.9 119 DIVIDE PEAK 8800 22.0 16.9 131 30.9 27.9 111 OLD BATTLE 10000 40.0 37.8 106 45.8 36.4 126 SANDSTONE RS 8150 6.8 7.3 95 25.4 23.5 108 WHISKEY PARK 8950 32.4 28.2 116 37.3 34.8 108 ----- ----- Basin wide percent of average 111 115 UPPER GREEN RIVER BIG SANDY OPENING 9100 15.7 12.5 126 18.4 18.9 98 BLIND BULL SUM 8650 32.4 22.7 144 27.0 27.4 99 EAST RIM DIVIDE 7930 15.0 14.1 106 17.4 17.7 99 ELKHART PARK G.S. 9400 16.2 12.6 128 18.4 18.7 99 GROS VENTRE SUMMIT 8775 16.5 12.6 131 18.9 18.5 102 KENDALL R.S. 7740 11.6 7.0 169 19.2 18.0 107 LOOMIS PARK 8240 -M 13.9 * 24.0 21.9 111 NEW FORK LAKE 8340 12.1 8.1 150 15.0 16.9 90 SNIDER BASIN 8250 19.5 11.5 172 22.2 17.7 126 SPRING CREEK DIVIDE 9000 37.2 28.4 131 34.7 31.4 111 TRIPLE PEAK 8500 31.9 23.7 135 37.3 35.8 105 ----- ----- Basin wide percent of average 136 105 LOWER GREEN RIVER HAMS FORK 7840 10.1 3.8 273 17.5 15.5 113 HEWINTA 9500 13.5 3.5 386 18.9 16.9 113 HICKERSON PARK 9150 6.5 2.2 310 14.4 12.9 112 HOLE-IN-ROCK 9150 9.1 1.7 536 14.7 12.9 115 INDIAN CREEK 9425 37.9 27.5 138 32.9 29.7 111 KELLEY R.S. 8180 16.9 13.4 128 23.4 21.9 108 STEEL CREEK PARK 10100 21.2 18.2 118 22.7 16.7 136 ----- ----- Basin wide percent of average 165 115 UPPER BEAR RIVER BUG LAKE 7950 25.9 14.0 187 28.2 23.0 123 HAYDEN FORK 9400 15.0 4.5 334 27.4 23.7 116 KELLEY R.S. 8180 16.9 13.4 128 23.4 21.9 108 LILY LAKE 9050 14.2 7.8 185 23.7 18.7 127 MONTE CRISTO 8960 38.8 24.7 157 36.3 30.9 118 SALT RIVER SUMMIT 7600 13.6 7.0 195 21.7 19.7 111 TRIAL LAKE 9960 27.9 23.0 122 30.2 28.9 105 ----- ----- Basin wide percent of average 162 115 ----------------------------------------------------------------------------- -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.