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 WEDNESDAY: MAY 19 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 11.5 3.8 311 30.9 26.9 116 COTTONWOOD CREEK 7600 23.2 10.9 215 36.7 29.9 123 GRANITE CREEK 6770 12.5 6.0 207 27.9 28.7 98 GRASSY LAKE 7265 39.9 23.7 169 49.8 44.5 112 GROS VENTRE SUMMIT 8775 -M 7.8 * -M 19.4 * LEWIS LAKE DIVIDE 7860 39.3 27.4 144 46.0 45.3 102 PHILLIPS BENCH 8200 33.4 23.5 143 37.3 35.8 105 SALT RIVER SUMMIT 7600 10.0 .0 * 22.9 20.5 112 SNAKE RIVER STATION 6920 -M 8.9 * -M 31.4 * SPRING CREEK DIVIDE 9000 38.5 24.4 158 36.3 32.7 112 THUMB DIVIDE 7980 -M 8.6 * -M 25.2 * TOGWOTEE PASS 9580 -M 25.5 * 35.8 33.9 106 TWO OCEAN PLATEAU 9360 42.2 25.5 166 37.2 36.9 101 WILLOW CREEK 8450 33.7 25.9 131 48.9 38.5 128 ----- ----- Basin wide percent of average 161 110 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 29.2 23.7 123 28.2 23.5 120 BLACK BEAR 7950 57.8 34.8 166 55.4 48.9 114 CANYON 7940 13.0 5.5 239 22.9 17.9 128 FISHER CREEK 9100 42.9 36.2 119 43.9 45.0 98 MADISON PLATEAU 7750 -M 16.4 * 39.2 31.9 123 NORTHEAST ENTRANCE 7350 1.4 2.2 67 17.9 15.5 115 PARKER PEAK 9400 27.9 21.9 128 -M 20.2 * SYLVAN LAKE 8420 25.0 19.2 131 33.9 24.7 138 THUMB DIVIDE 7980 -M 8.6 * -M 25.2 * TWO OCEAN PLATEAU 9360 42.2 25.5 166 37.2 36.9 101 WHISKEY CREEK 6800 -M 7.6 * 30.0 26.5 114 WHITE MILL 8700 31.4 23.7 133 30.2 35.0 87 WOLVERINE 7650 .0 2.3 0 15.5 16.9 92 ----- ----- Basin wide percent of average 139 110 WIND RIVER BURROUGHS CREEK 8750 -M 5.8 * -M 21.4 * COLD SPRINGS 9630 17.9 2.3 774 24.9 15.0 167 DEER PARK 9700 26.9 -M * 34.2 -M * HOBBS PARK 10100 31.4 15.2 206 29.2 19.4 151 LITTLE WARM 9620 19.7 4.3 459 25.2 18.2 139 SOUTH PASS 9040 23.9 15.0 159 31.2 22.7 138 ST. LAWRENCE ALT 8620 -M 1.9 * -M 14.0 * TOGWOTEE PASS 9580 -M 25.5 * 35.8 33.9 106 TOWNSEND CREEK 8700 17.5 5.1 344 26.7 17.4 153 ----- ----- Basin wide percent of average 263 137 BIGHORN BASIN BALD MTN. 9375 26.4 23.2 115 26.2 23.5 112 BEAR TRAP MEADOW 7900 1.2 1.2 100 18.2 12.6 144 BLACKWATER 9780 37.4 23.4 160 31.2 22.7 139 BONE SPRINGS DIV 9350 23.4 14.7 160 25.7 20.5 125 EVENING STAR 9200 37.5 29.2 129 41.2 28.4 146 GRAVE SPRINGS 8550 10.6 9.0 120 18.9 14.7 129 KIRWIN 9550 18.0 9.0 200 21.5 15.0 144 MARQUETTE 8760 19.2 6.8 283 22.0 15.9 140 MIDDLE POWDER 7760 17.2 11.4 152 23.0 16.9 137 OWL CREEK 8975 10.6 .9 1325 15.5 9.7 160 POWDER RIVER PASS 9480 13.0 5.1 255 22.9 16.9 137 SHELL CREEK 9580 19.9 15.7 127 21.4 18.2 118 SYLVAN LAKE 8420 25.0 19.2 131 33.9 24.7 138 SYLVAN ROAD 8120 -M 3.3 * -M 20.5 * TIMBER CREEK 7950 10.6 2.0 530 18.4 12.4 150 YOUNTS PEAK 8350 21.0 14.4 147 22.7 21.2 108 ----- ----- Basin wide percent of average 158 133 SHOSHONE RIVER BLACKWATER 9780 37.4 23.4 160 31.2 22.7 139 EVENING STAR 9200 37.5 29.2 129 41.2 28.4 146 KIRWIN 9550 18.0 9.0 200 21.5 15.0 144 MARQUETTE 8760 19.2 6.8 283 22.0 15.9 140 SYLVAN LAKE 8420 25.0 19.2 131 33.9 24.7 138 SYLVAN ROAD 8120 -M 3.3 * -M 20.5 * YOUNTS PEAK 8350 21.0 14.4 147 22.7 21.2 108 ----- ----- Basin wide percent of average 156 136 POWDER-TONGUE BEAR TRAP MEADOW 7900 1.2 1.2 100 18.2 12.6 144 BIG GOOSE 7990 9.6 -M * 19.7 -M * BONE SPRINGS DIV 9350 23.4 14.7 160 25.7 20.5 125 BURGESS JUNCTION 7880 12.1 9.1 133 18.7 16.4 115 CLOUD PEAK RESERVOIR 9860 24.9 14.4 175 25.9 19.7 132 DOME LAKE 8880 -M 8.9 * 18.7 18.7 100 GRAVE SPRINGS 8550 10.6 9.0 120 18.9 14.7 129 HANSEN SAWMILL 8760 3.3 3.3 97 18.0 12.0 152 MIDDLE POWDER 7760 17.2 11.4 152 23.0 16.9 137 POWDER RIVER PASS 9480 13.0 5.1 255 22.9 16.9 137 SUCKER CREEK 8880 15.9 9.0 176 23.2 18.9 123 TIE CREEK 6870 3.8 -M * 19.4 15.7 123 ----- ----- Basin wide percent of average 158 128 BELLE FOURCHE BLIND PARK 6890 .5 3.7 12 20.4 16.4 124 NORTH RAPID CREEK 6130 .0 -M * 17.9 -M * WARREN PEAK 6520 .7 3.7 20 -M 12.1 * ----- ----- Basin wide percent of average 16 124* UPPER N. PLATTE RIVER COLUMBINE 9400 10.5 11.5 92 30.2 29.9 102 DIVIDE PEAK 8800 19.4 10.4 188 33.0 29.4 113 ELK RIVER 8700 9.0 6.6 137 30.2 23.5 129 JOE WRIGHT 10120 24.2 22.2 110 34.4 33.0 105 NORTH FRENCH CREEK 10100 42.3 25.2 168 40.3 30.5 133 OLD BATTLE 10000 40.9 33.9 121 48.7 38.0 128 SOUTH BRUSH CREEK 8400 9.9 4.8 205 27.4 22.2 123 TOWER 10500 -M 49.3 * -M 46.9 * WEBBER SPRINGS 9200 19.4 18.2 107 35.3 32.5 109 WILLOW CREEK PASS 9540 13.9 8.9 157 16.9 17.2 99 ----- ----- Basin wide percent of average 134 116 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 27.7 22.2 125 33.0 25.9 128 CASPER MTN. 7900 9.7 9.5 104 23.9 21.2 113 DEADMAN HILL 10220 21.0 16.7 126 24.9 23.2 108 DEER PARK 9700 26.9 -M * 34.2 -M * LAPRELE CREEK 8320 .0 2.9 0 21.5 16.7 129 RENO HILL 8400 11.0 7.3 151 27.2 23.7 115 ROACH 9700 -M 14.0 * 26.9 28.4 95 SAND LAKE 10080 46.3 32.9 141 39.4 26.9 147 SOUTH PASS 9040 23.9 15.0 159 31.2 22.7 138 WINDY PEAK 7840 .0 2.8 0 19.2 14.4 135 ----- ----- Basin wide percent of average 128 122 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .2 .0 * 24.2 19.9 122 DIVIDE PEAK 8800 19.4 10.4 188 33.0 29.4 113 OLD BATTLE 10000 40.9 33.9 121 48.7 38.0 128 SANDSTONE RS 8150 .3 1.9 12 27.0 24.9 109 WHISKEY PARK 8950 31.2 22.2 141 39.7 36.5 109 ----- ----- Basin wide percent of average 135 116 UPPER GREEN RIVER BIG SANDY OPENING 9100 14.0 7.5 186 19.7 19.9 100 BLIND BULL SUM 8650 33.7 21.0 161 28.5 28.5 100 EAST RIM DIVIDE 7930 14.0 11.5 123 18.4 18.5 100 ELKHART PARK G.S. 9400 15.7 8.6 183 19.9 19.4 103 GROS VENTRE SUMMIT 8775 -M 7.8 * -M 19.4 * KENDALL R.S. 7740 8.0 .0 * 20.5 18.9 109 LOOMIS PARK 8240 -M 8.7 * 25.4 22.9 111 NEW FORK LAKE 8340 9.1 4.8 190 16.7 17.7 95 SNIDER BASIN 8250 15.0 6.5 230 23.2 18.4 126 SPRING CREEK DIVIDE 9000 38.5 24.4 158 36.3 32.7 112 TRIPLE PEAK 8500 30.2 19.7 154 39.3 37.3 106 ----- ----- Basin wide percent of average 164 106 LOWER GREEN RIVER HAMS FORK 7840 2.0 .0 * 18.4 16.2 113 HEWINTA 9500 11.5 .0 * 20.5 17.9 115 HICKERSON PARK 9150 2.5 .5 500* 15.4 14.0 110 HOLE-IN-ROCK 9150 6.0 .5 1181* 16.0 14.0 114 INDIAN CREEK 9425 38.7 23.2 167 34.8 31.0 113 KELLEY R.S. 8180 13.9 7.8 180 24.7 22.9 109 STEEL CREEK PARK 10100 23.5 15.6 151 24.7 18.4 135 ----- ----- Basin wide percent of average 178* 115 UPPER BEAR RIVER BUG LAKE 7950 21.4 8.4 257 29.7 24.0 124 HAYDEN FORK 9400 12.6 .6 2101* 29.5 24.9 119 KELLEY R.S. 8180 13.9 7.8 180 24.7 22.9 109 LILY LAKE 9050 11.4 4.6 246 25.5 19.9 129 MONTE CRISTO 8960 41.3 19.2 216 38.5 32.3 120 SALT RIVER SUMMIT 7600 10.0 .0 * 22.9 20.5 112 TRIAL LAKE 9960 28.0 18.9 149 31.5 30.4 104 ----- ----- Basin wide percent of average 217 116 ----------------------------------------------------------------------------- -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.