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 17 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 12.9 4.3 298 30.9 26.7 116 COTTONWOOD CREEK 7600 23.9 12.5 193 36.7 29.7 124 GRANITE CREEK 6770 13.2 6.8 198 27.7 28.4 98 GRASSY LAKE 7265 39.8 25.5 157 49.7 44.3 113 GROS VENTRE SUMMIT 8775 -M 9.0 * -M 19.2 * LEWIS LAKE DIVIDE 7860 39.3 28.5 138 46.0 45.0 103 PHILLIPS BENCH 8200 33.3 24.4 137 37.3 35.5 105 SALT RIVER SUMMIT 7600 11.9 .0 * 22.9 20.4 112 SNAKE RIVER STATION 6920 11.1 10.2 109 30.4 31.0 98 SPRING CREEK DIVIDE 9000 38.3 25.2 152 36.3 32.4 113 THUMB DIVIDE 7980 -M 10.0 * -M 24.9 * TOGWOTEE PASS 9580 -M 25.9 * 35.8 33.8 106 TWO OCEAN PLATEAU 9360 42.9 25.9 166 37.2 36.8 102 WILLOW CREEK 8450 33.0 26.9 124 49.0 38.3 129 ----- ----- Basin wide percent of average 152 110 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 29.0 24.4 120 28.0 23.2 121 BLACK BEAR 7950 58.3 35.9 163 55.4 48.8 114 CANYON 7940 13.4 6.0 222 22.7 17.7 129 FISHER CREEK 9100 42.9 36.8 117 43.8 44.8 98 MADISON PLATEAU 7750 -M 17.7 * 39.0 31.7 124 NORTHEAST ENTRANCE 7350 2.4 2.4 100 17.7 15.4 116 PARKER PEAK 9400 27.9 22.4 125 -M 20.0 * SYLVAN LAKE 8420 25.4 19.9 128 33.9 24.4 139 THUMB DIVIDE 7980 -M 10.0 * -M 24.9 * TWO OCEAN PLATEAU 9360 42.9 25.9 166 37.2 36.8 102 WHISKEY CREEK 6800 -M 8.6 * -M 26.4 * WHITE MILL 8700 31.4 24.4 130 30.0 34.8 87 WOLVERINE 7650 .7 2.8 26 15.7 16.7 95 ----- ----- Basin wide percent of average 137 111 WIND RIVER BURROUGHS CREEK 8750 19.0 6.5 297 23.5 21.0 112 COLD SPRINGS 9630 18.7 2.7 716 24.7 14.7 169 DEER PARK 9700 27.2 -M * 34.2 -M * HOBBS PARK 10100 -M 16.2 * 29.2 19.2 152 LITTLE WARM 9620 20.4 5.0 417 25.0 17.9 140 SOUTH PASS 9040 24.7 15.9 157 31.0 22.4 139 ST. LAWRENCE ALT 8620 12.2 2.3 555 21.5 13.7 157 TOGWOTEE PASS 9580 -M 25.9 * 35.8 33.8 106 TOWNSEND CREEK 8700 18.4 5.6 327 26.4 17.2 154 ----- ----- Basin wide percent of average 302 136 BIGHORN BASIN BALD MTN. 9375 26.5 23.9 112 25.9 23.2 112 BEAR TRAP MEADOW 7900 -M 1.4 * 18.0 12.5 146 BLACKWATER 9780 37.3 24.2 155 31.0 22.4 139 BONE SPRINGS DIV 9350 23.7 15.7 151 25.4 20.4 126 EVENING STAR 9200 37.3 29.9 126 41.0 28.0 147 GRAVE SPRINGS 8550 11.4 10.0 114 18.9 14.5 131 KIRWIN 9550 18.0 9.6 188 21.4 14.9 145 MARQUETTE 8760 19.2 7.3 266 21.7 15.5 140 MIDDLE POWDER 7760 17.7 12.7 140 23.2 16.7 140 OWL CREEK 8975 11.4 .0 1256 15.4 9.5 162 POWDER RIVER PASS 9480 13.5 5.8 236 22.9 16.7 138 SHELL CREEK 9580 20.5 16.4 126 21.4 18.0 119 SYLVAN LAKE 8420 25.4 19.9 128 33.9 24.4 139 SYLVAN ROAD 8120 -M 3.8 * -M 20.4 * TIMBER CREEK 7950 11.5 2.3 501 18.4 12.0 154 YOUNTS PEAK 8350 21.2 15.1 141 22.7 20.9 109 ----- ----- Basin wide percent of average 153 135 SHOSHONE RIVER BLACKWATER 9780 37.3 24.2 155 31.0 22.4 139 EVENING STAR 9200 37.3 29.9 126 41.0 28.0 147 KIRWIN 9550 18.0 9.6 188 21.4 14.9 145 MARQUETTE 8760 19.2 7.3 266 21.7 15.5 140 SYLVAN LAKE 8420 25.4 19.9 128 33.9 24.4 139 SYLVAN ROAD 8120 -M 3.8 * -M 20.4 * YOUNTS PEAK 8350 21.2 15.1 141 22.7 20.9 109 ----- ----- Basin wide percent of average 150 137 POWDER-TONGUE BEAR TRAP MEADOW 7900 -M 1.4 * 18.0 12.5 146 BIG GOOSE 7990 10.5 -M * 19.4 -M * BONE SPRINGS DIV 9350 23.7 15.7 151 25.4 20.4 126 BURGESS JUNCTION 7880 12.5 10.1 124 18.7 16.2 115 CLOUD PEAK RESERVOIR 9860 25.2 15.2 166 25.7 19.4 133 DOME LAKE 8880 -M 9.6 * 18.7 18.4 102 GRAVE SPRINGS 8550 11.4 10.0 114 18.9 14.5 131 HANSEN SAWMILL 8760 4.3 3.8 117 18.0 11.7 154 MIDDLE POWDER 7760 17.7 12.7 140 23.2 16.7 140 POWDER RIVER PASS 9480 13.5 5.8 236 22.9 16.7 138 SUCKER CREEK 8880 16.2 9.9 166 23.2 18.7 125 TIE CREEK 6870 4.5 -M * 19.2 15.5 124 ----- ----- Basin wide percent of average 150 129 BELLE FOURCHE BLIND PARK 6890 .5 4.1 10 20.4 16.2 127 NORTH RAPID CREEK 6130 .0 -M * 17.7 -M * WARREN PEAK 6520 .7 4.1 18 -M 12.0 * ----- ----- Basin wide percent of average 14 127* UPPER N. PLATTE RIVER COLUMBINE 9400 12.5 12.9 98 29.9 29.7 101 DIVIDE PEAK 8800 20.4 11.5 179 32.8 29.2 113 ELK RIVER 8700 10.9 7.6 143 29.7 23.4 127 JOE WRIGHT 10120 24.2 23.0 106 34.3 32.8 105 NORTH FRENCH CREEK 10100 42.0 26.0 162 40.5 30.4 134 OLD BATTLE 10000 41.4 35.4 117 48.3 37.8 128 SOUTH BRUSH CREEK 8400 10.0 5.5 184 27.2 22.0 124 TOWER 10500 -M 50.2 * -M 46.5 * WEBBER SPRINGS 9200 20.7 19.4 107 34.9 32.3 109 WILLOW CREEK PASS 9540 14.7 9.9 150 16.5 16.9 98 ----- ----- Basin wide percent of average 131 116 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 27.9 23.5 119 32.9 25.7 129 CASPER MTN. 7900 11.6 10.4 113 23.9 21.0 114 DEADMAN HILL 10220 21.4 17.7 121 24.9 23.0 108 DEER PARK 9700 27.2 -M * 34.2 -M * LAPRELE CREEK 8320 .0 3.3 0 21.4 16.5 130 RENO HILL 8400 13.0 8.0 163 27.0 23.4 116 ROACH 9700 -M 15.0 * 26.7 28.2 96 SAND LAKE 10080 46.3 34.3 136 39.2 26.7 147 SOUTH PASS 9040 24.7 15.9 157 31.0 22.4 139 WINDY PEAK 7840 .2 3.2 4 18.7 14.1 132 ----- ----- Basin wide percent of average 126 123 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 .0 100* 23.9 19.9 121 DIVIDE PEAK 8800 20.4 11.5 179 32.8 29.2 113 OLD BATTLE 10000 41.4 35.4 117 48.3 37.8 128 SANDSTONE RS 8150 2.9 2.2 139 27.2 24.7 111 WHISKEY PARK 8950 31.9 23.9 134 39.4 36.3 109 ----- ----- Basin wide percent of average 133 117 UPPER GREEN RIVER BIG SANDY OPENING 9100 -M 8.7 * -M 19.7 * BLIND BULL SUM 8650 33.7 21.7 155 28.5 28.4 101 EAST RIM DIVIDE 7930 14.5 12.1 120 18.4 18.4 100 ELKHART PARK G.S. 9400 16.0 9.2 174 19.7 19.4 103 GROS VENTRE SUMMIT 8775 -M 9.0 * -M 19.2 * KENDALL R.S. 7740 9.1 .0 * 20.4 18.7 110 LOOMIS PARK 8240 -M 10.0 * 25.2 22.7 112 NEW FORK LAKE 8340 10.4 5.5 188 16.4 17.4 95 SNIDER BASIN 8250 16.7 7.5 223 23.2 18.4 127 SPRING CREEK DIVIDE 9000 38.3 25.2 152 36.3 32.4 113 TRIPLE PEAK 8500 30.7 20.5 150 39.2 37.0 106 ----- ----- Basin wide percent of average 158 107 LOWER GREEN RIVER HAMS FORK 7840 5.0 .0 * 18.4 16.2 115 HEWINTA 9500 13.5 .0 * 20.5 17.7 116 HICKERSON PARK 9150 5.1 .6 850* 15.5 13.9 112 HOLE-IN-ROCK 9150 8.4 .5 1661* 16.0 13.9 116 INDIAN CREEK 9425 38.7 24.2 161 34.8 30.9 113 KELLEY R.S. 8180 15.1 9.0 170 24.7 22.7 109 STEEL CREEK PARK 10100 23.4 16.2 146 24.7 18.2 136 ----- ----- Basin wide percent of average 181* 116 UPPER BEAR RIVER BUG LAKE 7950 23.9 9.2 260 29.5 23.9 124 HAYDEN FORK 9400 14.9 .7 2115* 29.0 24.7 118 KELLEY R.S. 8180 15.1 9.0 170 24.7 22.7 109 LILY LAKE 9050 13.5 5.3 260 25.5 19.7 130 MONTE CRISTO 8960 39.8 20.5 195 38.4 32.2 120 SALT RIVER SUMMIT 7600 11.9 .0 * 22.9 20.4 112 TRIAL LAKE 9960 28.9 20.0 145 31.7 30.2 105 ----- ----- Basin wide percent of average 211 117 ----------------------------------------------------------------------------- -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.