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 TUESDAY: MAY 18 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 12.4 4.0 308 30.9 26.7 116 COTTONWOOD CREEK 7600 23.9 11.6 206 36.7 29.9 123 GRANITE CREEK 6770 13.0 6.5 204 27.7 28.5 98 GRASSY LAKE 7265 40.0 24.7 163 49.7 44.4 112 GROS VENTRE SUMMIT 8775 16.5 8.5 197 20.4 19.2 106 LEWIS LAKE DIVIDE 7860 39.3 27.9 141 46.0 45.2 102 PHILLIPS BENCH 8200 33.3 24.0 139 37.3 35.7 105 SALT RIVER SUMMIT 7600 11.4 .0 * 22.9 20.5 112 SNAKE RIVER STATION 6920 10.9 9.5 114 30.4 31.2 98 SPRING CREEK DIVIDE 9000 38.3 24.9 155 36.3 32.5 112 THUMB DIVIDE 7980 18.4 9.4 198 27.9 25.0 112 TOGWOTEE PASS 9580 -M 25.7 * 35.8 33.8 106 TWO OCEAN PLATEAU 9360 43.0 25.7 168 37.2 36.8 101 WILLOW CREEK 8450 33.7 26.4 128 48.9 38.3 128 ----- ----- Basin wide percent of average 160 109 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 29.2 24.0 122 28.2 23.4 121 BLACK BEAR 7950 58.3 35.4 165 55.4 48.8 114 CANYON 7940 13.1 5.8 230 22.7 17.9 128 FISHER CREEK 9100 43.0 36.4 119 43.8 44.9 98 MADISON PLATEAU 7750 -M 16.9 * 39.0 31.9 123 NORTHEAST ENTRANCE 7350 2.0 2.3 91 17.7 15.5 115 PARKER PEAK 9400 27.9 22.0 127 -M 20.2 * SYLVAN LAKE 8420 25.4 19.5 130 33.9 24.5 139 THUMB DIVIDE 7980 18.4 9.4 198 27.9 25.0 112 TWO OCEAN PLATEAU 9360 43.0 25.7 168 37.2 36.8 101 WHISKEY CREEK 6800 18.7 8.1 231 30.0 26.4 114 WHITE MILL 8700 31.4 24.0 131 30.2 34.8 87 WOLVERINE 7650 .3 2.5 9 15.7 16.9 94 ----- ----- Basin wide percent of average 145 111 WIND RIVER BURROUGHS CREEK 8750 18.9 6.1 310 23.5 21.2 111 COLD SPRINGS 9630 18.7 2.4 776 24.9 14.9 168 DEER PARK 9700 27.2 -M * 34.2 -M * HOBBS PARK 10100 31.2 15.6 200 29.2 19.4 152 LITTLE WARM 9620 20.2 4.6 437 25.2 18.0 140 SOUTH PASS 9040 24.5 15.5 160 31.2 22.5 139 ST. LAWRENCE ALT 8620 12.0 2.0 600 21.7 13.9 157 TOGWOTEE PASS 9580 -M 25.7 * 35.8 33.8 106 TOWNSEND CREEK 8700 18.2 5.5 338 26.7 17.4 154 ----- ----- Basin wide percent of average 279 136 BIGHORN BASIN BALD MTN. 9375 26.5 23.4 114 26.0 23.4 112 BEAR TRAP MEADOW 7900 1.9 1.2 151 18.2 12.5 145 BLACKWATER 9780 37.4 23.9 158 31.2 22.5 139 BONE SPRINGS DIV 9350 23.7 15.2 156 25.5 20.4 126 EVENING STAR 9200 37.5 29.5 128 41.0 28.2 146 GRAVE SPRINGS 8550 11.4 9.5 119 18.9 14.5 130 KIRWIN 9550 18.2 9.4 195 21.4 15.0 144 MARQUETTE 8760 19.2 7.0 275 21.9 15.6 141 MIDDLE POWDER 7760 17.7 12.0 147 23.0 16.7 138 OWL CREEK 8975 11.0 .0 1223 15.5 9.6 161 POWDER RIVER PASS 9480 13.4 5.5 247 22.9 16.7 138 SHELL CREEK 9580 20.4 16.0 128 21.4 18.2 119 SYLVAN LAKE 8420 25.4 19.5 130 33.9 24.5 139 SYLVAN ROAD 8120 -M 3.5 * -M 20.4 * TIMBER CREEK 7950 11.1 2.2 529 18.4 12.1 153 YOUNTS PEAK 8350 21.4 14.7 145 22.7 21.0 108 ----- ----- Basin wide percent of average 156 134 SHOSHONE RIVER BLACKWATER 9780 37.4 23.9 158 31.2 22.5 139 EVENING STAR 9200 37.5 29.5 128 41.0 28.2 146 KIRWIN 9550 18.2 9.4 195 21.4 15.0 144 MARQUETTE 8760 19.2 7.0 275 21.9 15.6 141 SYLVAN LAKE 8420 25.4 19.5 130 33.9 24.5 139 SYLVAN ROAD 8120 -M 3.5 * -M 20.4 * YOUNTS PEAK 8350 21.4 14.7 145 22.7 21.0 108 ----- ----- Basin wide percent of average 153 136 POWDER-TONGUE BEAR TRAP MEADOW 7900 1.9 1.2 151 18.2 12.5 145 BIG GOOSE 7990 10.1 -M * 19.7 -M * BONE SPRINGS DIV 9350 23.7 15.2 156 25.5 20.4 126 BURGESS JUNCTION 7880 12.5 9.6 130 18.7 16.4 115 CLOUD PEAK RESERVOIR 9860 25.2 14.9 171 25.9 19.5 133 DOME LAKE 8880 -M 9.2 * 18.7 18.5 101 GRAVE SPRINGS 8550 11.4 9.5 119 18.9 14.5 130 HANSEN SAWMILL 8760 4.1 3.5 118 18.0 11.9 153 MIDDLE POWDER 7760 17.7 12.0 147 23.0 16.7 138 POWDER RIVER PASS 9480 13.4 5.5 247 22.9 16.7 138 SUCKER CREEK 8880 16.2 9.5 172 23.2 18.7 125 TIE CREEK 6870 4.3 -M * 19.2 15.6 124 ----- ----- Basin wide percent of average 156 128 BELLE FOURCHE BLIND PARK 6890 .5 3.8 11 20.4 16.4 125 NORTH RAPID CREEK 6130 .0 -M * 17.7 -M * WARREN PEAK 6520 .7 3.9 18 -M 12.0 * ----- ----- Basin wide percent of average 15 125* UPPER N. PLATTE RIVER COLUMBINE 9400 11.6 12.1 96 29.9 29.7 101 DIVIDE PEAK 8800 20.7 11.0 189 33.0 29.4 113 ELK RIVER 8700 10.7 7.1 151 29.7 23.5 127 JOE WRIGHT 10120 24.2 22.7 107 34.4 32.9 105 NORTH FRENCH CREEK 10100 42.2 25.7 165 40.4 30.4 133 OLD BATTLE 10000 41.3 34.8 120 48.5 37.9 128 SOUTH BRUSH CREEK 8400 10.0 5.1 195 27.4 22.2 124 TOWER 10500 -M 49.8 * -M 46.8 * WEBBER SPRINGS 9200 20.2 18.9 108 35.3 32.4 109 WILLOW CREEK PASS 9540 14.4 9.4 154 16.7 17.0 98 ----- ----- Basin wide percent of average 134 116 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 28.2 22.9 124 33.0 25.7 129 CASPER MTN. 7900 11.0 10.0 111 23.9 21.2 114 DEADMAN HILL 10220 21.7 17.2 126 24.9 23.2 108 DEER PARK 9700 27.2 -M * 34.2 -M * LAPRELE CREEK 8320 .0 3.0 0 21.4 16.7 129 RENO HILL 8400 12.0 7.6 158 27.2 23.5 116 ROACH 9700 -M 14.5 * 26.9 28.4 95 SAND LAKE 10080 46.3 33.5 138 39.4 26.9 148 SOUTH PASS 9040 24.5 15.5 160 31.2 22.5 139 WINDY PEAK 7840 .0 2.9 0 19.0 14.2 134 ----- ----- Basin wide percent of average 128 123 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 .0 100* 24.2 19.9 122 DIVIDE PEAK 8800 20.7 11.0 189 33.0 29.4 113 OLD BATTLE 10000 41.3 34.8 120 48.5 37.9 128 SANDSTONE RS 8150 1.7 1.9 90 27.2 24.7 110 WHISKEY PARK 8950 31.7 23.0 138 39.5 36.4 109 ----- ----- Basin wide percent of average 136 117 UPPER GREEN RIVER BIG SANDY OPENING 9100 14.5 8.1 180 19.7 19.7 100 BLIND BULL SUM 8650 33.7 21.4 158 28.5 28.4 101 EAST RIM DIVIDE 7930 14.5 11.7 124 18.4 18.4 100 ELKHART PARK G.S. 9400 16.0 9.0 180 19.9 19.4 103 GROS VENTRE SUMMIT 8775 16.5 8.5 197 20.4 19.2 106 KENDALL R.S. 7740 8.6 .0 * 20.5 18.9 110 LOOMIS PARK 8240 -M 9.5 * 25.4 22.9 111 NEW FORK LAKE 8340 10.0 5.3 191 16.5 17.5 95 SNIDER BASIN 8250 16.0 7.0 229 23.2 18.4 127 SPRING CREEK DIVIDE 9000 38.3 24.9 155 36.3 32.5 112 TRIPLE PEAK 8500 30.9 20.2 154 39.3 37.2 106 ----- ----- Basin wide percent of average 165 107 LOWER GREEN RIVER HAMS FORK 7840 3.5 .0 * 18.4 16.2 113 HEWINTA 9500 13.0 .0 * 20.5 17.9 116 HICKERSON PARK 9150 3.9 .5 780* 15.4 14.0 111 HOLE-IN-ROCK 9150 7.3 .5 1441* 16.0 14.0 116 INDIAN CREEK 9425 39.0 23.7 166 34.8 30.9 113 KELLEY R.S. 8180 14.6 8.4 176 24.7 22.7 109 STEEL CREEK PARK 10100 23.4 15.9 149 24.7 18.2 136 ----- ----- Basin wide percent of average 181* 116 UPPER BEAR RIVER BUG LAKE 7950 22.9 8.9 260 29.7 23.9 125 HAYDEN FORK 9400 14.0 .6 2334* 29.4 24.9 119 KELLEY R.S. 8180 14.6 8.4 176 24.7 22.7 109 LILY LAKE 9050 12.5 5.0 256 25.5 19.9 129 MONTE CRISTO 8960 41.3 19.9 209 38.4 32.3 120 SALT RIVER SUMMIT 7600 11.4 .0 * 22.9 20.5 112 TRIAL LAKE 9960 28.7 19.5 147 31.7 30.2 105 ----- ----- Basin wide percent of average 216 117 ----------------------------------------------------------------------------- -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.