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 15 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 12.6 5.0 258 30.2 26.5 114 COTTONWOOD CREEK 7600 23.7 14.1 169 36.3 29.7 123 GRANITE CREEK 6770 13.5 7.5 182 27.5 28.2 98 GRASSY LAKE 7265 39.3 27.4 144 48.7 43.9 111 GROS VENTRE SUMMIT 8775 -M 10.2 * -M 19.2 * LEWIS LAKE DIVIDE 7860 38.5 29.7 130 45.3 44.8 102 PHILLIPS BENCH 8200 33.8 25.4 133 36.9 35.3 105 SALT RIVER SUMMIT 7600 11.9 .2 11801* 22.5 20.2 112 SNAKE RIVER STATION 6920 11.4 11.6 98 29.7 30.9 96 SPRING CREEK DIVIDE 9000 37.8 26.2 145 35.8 32.3 112 THUMB DIVIDE 7980 17.4 11.4 154 26.5 24.9 107 TOGWOTEE PASS 9580 -M 26.2 * 34.5 33.5 103 TWO OCEAN PLATEAU 9360 41.8 26.4 158 36.2 36.4 100 WILLOW CREEK 8450 32.8 27.9 118 48.3 38.0 127 ----- ----- Basin wide percent of average 148 108 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 29.4 25.0 118 27.7 23.0 121 BLACK BEAR 7950 57.4 37.2 155 54.8 48.4 114 CANYON 7940 13.1 6.6 199 22.4 17.5 128 FISHER CREEK 9100 42.8 37.5 115 43.5 44.4 98 MADISON PLATEAU 7750 -M 19.0 * 38.8 31.5 123 NORTHEAST ENTRANCE 7350 2.7 2.8 97 17.5 15.1 116 PARKER PEAK 9400 27.2 22.9 120 -M 19.7 * SYLVAN LAKE 8420 24.4 20.7 118 32.8 24.2 136 THUMB DIVIDE 7980 17.4 11.4 154 26.5 24.9 107 TWO OCEAN PLATEAU 9360 41.8 26.4 158 36.2 36.4 100 WHISKEY CREEK 6800 19.2 9.6 199 29.9 26.2 115 WHITE MILL 8700 31.4 25.0 126 29.7 34.5 87 WOLVERINE 7650 .7 3.2 23 15.5 16.7 94 ----- ----- Basin wide percent of average 135 110 WIND RIVER BURROUGHS CREEK 8750 17.9 7.0 256 22.4 20.9 107 COLD SPRINGS 9630 18.2 2.9 625 24.0 14.5 166 DEER PARK 9700 26.9 -M * 33.5 -M * HOBBS PARK 10100 30.4 17.0 179 28.2 19.0 149 LITTLE WARM 9620 20.2 5.5 368 24.5 17.7 139 SOUTH PASS 9040 24.7 16.7 149 30.7 22.2 139 ST. LAWRENCE ALT 8620 12.0 2.5 481 21.4 13.6 157 TOGWOTEE PASS 9580 -M 26.2 * 34.5 33.5 103 TOWNSEND CREEK 8700 18.0 6.1 296 26.0 17.0 153 ----- ----- Basin wide percent of average 246 134 BIGHORN BASIN BALD MTN. 9375 25.7 24.5 105 25.2 22.9 111 BEAR TRAP MEADOW 7900 1.2 1.5 74 16.9 12.1 139 BLACKWATER 9780 35.8 24.9 144 29.7 22.2 134 BONE SPRINGS DIV 9350 22.7 16.7 136 24.4 20.0 122 EVENING STAR 9200 37.3 30.4 123 40.3 27.9 145 GRAVE SPRINGS 8550 11.1 11.1 100 18.4 14.2 130 KIRWIN 9550 17.4 10.2 170 20.7 14.7 141 MARQUETTE 8760 17.4 7.8 226 20.0 15.4 131 MIDDLE POWDER 7760 17.4 14.1 124 23.2 16.4 142 OWL CREEK 8975 10.5 1.2 946 14.5 9.4 156 POWDER RIVER PASS 9480 12.9 6.3 204 22.2 16.4 136 SHELL CREEK 9580 20.2 17.0 119 21.0 17.7 119 SYLVAN LAKE 8420 24.4 20.7 118 32.8 24.2 136 SYLVAN ROAD 8120 7.0 4.1 171 22.2 20.2 110 TIMBER CREEK 7950 10.2 2.5 409 16.9 11.9 144 YOUNTS PEAK 8350 20.9 16.0 132 21.9 20.7 106 ----- ----- Basin wide percent of average 140 130 SHOSHONE RIVER BLACKWATER 9780 35.8 24.9 144 29.7 22.2 134 EVENING STAR 9200 37.3 30.4 123 40.3 27.9 145 KIRWIN 9550 17.4 10.2 170 20.7 14.7 141 MARQUETTE 8760 17.4 7.8 226 20.0 15.4 131 SYLVAN LAKE 8420 24.4 20.7 118 32.8 24.2 136 SYLVAN ROAD 8120 7.0 4.1 171 22.2 20.2 110 YOUNTS PEAK 8350 20.9 16.0 132 21.9 20.7 106 ----- ----- Basin wide percent of average 141 130 POWDER-TONGUE BEAR TRAP MEADOW 7900 1.2 1.5 74 16.9 12.1 139 BIG GOOSE 7990 10.0 -M * 18.9 -M * BONE SPRINGS DIV 9350 22.7 16.7 136 24.4 20.0 122 BURGESS JUNCTION 7880 11.6 11.2 104 17.9 16.0 112 CLOUD PEAK RESERVOIR 9860 24.7 16.2 153 25.2 19.0 133 DOME LAKE 8880 -M 10.5 * 18.2 18.2 100 GRAVE SPRINGS 8550 11.1 11.1 100 18.4 14.2 130 HANSEN SAWMILL 8760 3.8 4.1 91 17.2 11.6 149 MIDDLE POWDER 7760 17.4 14.1 124 23.2 16.4 142 POWDER RIVER PASS 9480 12.9 6.3 204 22.2 16.4 136 SUCKER CREEK 8880 15.1 10.5 144 22.0 18.4 120 TIE CREEK 6870 3.3 -M * 18.0 15.4 118 ----- ----- Basin wide percent of average 131 126 BELLE FOURCHE BLIND PARK 6890 .5 4.8 9 20.0 15.9 127 NORTH RAPID CREEK 6130 .0 -M * 17.5 -M * WARREN PEAK 6520 1.0 4.8 22 -M 11.7 * ----- ----- Basin wide percent of average 15 127* UPPER N. PLATTE RIVER COLUMBINE 9400 14.0 14.2 99 29.7 29.4 102 DIVIDE PEAK 8800 20.2 12.5 162 32.8 28.9 114 ELK RIVER 8700 11.5 8.6 133 29.5 23.2 128 JOE WRIGHT 10120 23.9 23.9 101 33.9 32.4 105 NORTH FRENCH CREEK 10100 41.4 26.9 155 40.3 30.0 135 OLD BATTLE 10000 41.2 37.0 112 48.2 37.5 129 SOUTH BRUSH CREEK 8400 10.2 6.0 170 26.7 21.9 122 TOWER 10500 -M 50.9 * -M 46.2 * WEBBER SPRINGS 9200 20.9 20.7 102 34.8 32.2 109 WILLOW CREEK PASS 9540 15.2 10.9 141 16.5 16.9 99 ----- ----- Basin wide percent of average 124 116 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 28.5 25.0 115 32.7 25.4 129 CASPER MTN. 7900 12.5 11.2 112 23.9 20.7 115 DEADMAN HILL 10220 21.9 18.7 117 24.4 22.7 108 DEER PARK 9700 26.9 -M * 33.5 -M * LAPRELE CREEK 8320 .0 3.5 0 21.0 16.4 129 RENO HILL 8400 14.0 8.7 161 26.9 23.4 116 ROACH 9700 -M 16.2 * 26.4 27.9 95 SAND LAKE 10080 46.3 35.5 131 38.8 26.5 147 SOUTH PASS 9040 24.7 16.7 149 30.7 22.2 139 WINDY PEAK 7840 .2 3.7 3 18.4 13.9 134 ----- ----- Basin wide percent of average 121 123 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 .2 0* 23.9 19.7 122 DIVIDE PEAK 8800 20.2 12.5 162 32.8 28.9 114 OLD BATTLE 10000 41.2 37.0 112 48.2 37.5 129 SANDSTONE RS 8150 3.8 2.4 155 26.9 24.4 111 WHISKEY PARK 8950 31.7 25.4 125 39.2 36.0 109 ----- ----- Basin wide percent of average 125 117 UPPER GREEN RIVER BIG SANDY OPENING 9100 15.0 10.0 152 19.5 19.5 100 BLIND BULL SUM 8650 33.3 22.5 148 28.2 28.2 100 EAST RIM DIVIDE 7930 14.5 12.9 113 18.0 18.2 99 ELKHART PARK G.S. 9400 16.0 10.0 162 19.4 19.2 102 GROS VENTRE SUMMIT 8775 -M 10.2 * -M 19.2 * KENDALL R.S. 7740 8.9 .0 * 20.0 18.7 108 LOOMIS PARK 8240 -M 11.5 * 24.9 22.5 111 NEW FORK LAKE 8340 10.4 6.3 164 16.2 17.4 94 SNIDER BASIN 8250 16.9 8.6 196 22.9 18.2 126 SPRING CREEK DIVIDE 9000 37.8 26.2 145 35.8 32.3 112 TRIPLE PEAK 8500 30.7 21.4 144 38.7 36.8 105 ----- ----- Basin wide percent of average 149 106 LOWER GREEN RIVER HAMS FORK 7840 5.5 .2 5401* 18.4 16.0 115 HEWINTA 9500 13.0 .0 * 20.4 17.7 116 HICKERSON PARK 9150 4.5 .7 629* 15.4 13.7 112 HOLE-IN-ROCK 9150 8.0 .5 1600* 16.0 13.7 117 INDIAN CREEK 9425 38.7 25.0 155 34.4 30.7 113 KELLEY R.S. 8180 15.0 10.1 148 24.4 22.5 109 STEEL CREEK PARK 10100 23.4 16.7 140 24.5 17.9 138 ----- ----- Basin wide percent of average 179* 117 UPPER BEAR RIVER BUG LAKE 7950 23.7 10.2 232 29.4 23.7 124 HAYDEN FORK 9400 14.1 .9 1763* 29.0 24.5 119 KELLEY R.S. 8180 15.0 10.1 148 24.4 22.5 109 LILY LAKE 9050 13.1 5.8 226 25.4 19.5 131 MONTE CRISTO 8960 40.3 22.0 184 37.9 31.9 119 SALT RIVER SUMMIT 7600 11.9 .2 11801* 22.5 20.2 112 TRIAL LAKE 9960 28.9 21.2 137 31.5 29.9 106 ----- ----- Basin wide percent of average 210 117 ----------------------------------------------------------------------------- -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.