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 5 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 15.2 9.1 168 29.7 25.7 117 COTTONWOOD CREEK 7600 23.4 18.4 128 34.0 28.7 119 GRANITE CREEK 6770 16.2 11.5 142 26.9 27.2 99 GRASSY LAKE 7265 39.8 32.0 125 47.9 42.5 113 GROS VENTRE SUMMIT 8775 16.4 13.0 128 18.7 18.4 102 LEWIS LAKE DIVIDE 7860 39.7 33.2 120 44.3 43.3 103 PHILLIPS BENCH 8200 35.3 28.4 125 36.3 34.2 107 SALT RIVER SUMMIT 7600 13.5 7.8 174 21.5 19.5 111 SNAKE RIVER STATION 6920 13.7 15.0 92 29.2 29.9 98 SPRING CREEK DIVIDE 9000 37.3 28.7 131 34.5 31.2 111 THUMB DIVIDE 7980 -M 14.0 * -M 24.0 * TOGWOTEE PASS 9580 -M 27.7 * 33.2 32.4 103 TWO OCEAN PLATEAU 9360 40.7 27.4 149 35.4 35.3 101 WILLOW CREEK 8450 31.7 30.9 103 45.8 36.8 125 ----- ----- Basin wide percent of average 127 109 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 28.4 25.7 111 27.4 21.7 127 BLACK BEAR 7950 55.4 39.0 143 51.8 47.2 110 CANYON 7940 14.5 9.7 150 21.2 16.7 127 FISHER CREEK 9100 40.8 38.4 106 41.9 42.9 98 MADISON PLATEAU 7750 -M 22.5 * 36.7 30.4 121 NORTHEAST ENTRANCE 7350 5.0 5.0 99 16.5 14.4 116 PARKER PEAK 9400 27.2 23.5 116 -M 18.7 * SYLVAN LAKE 8420 24.5 22.9 107 31.9 22.9 140 THUMB DIVIDE 7980 -M 14.0 * -M 24.0 * TWO OCEAN PLATEAU 9360 40.7 27.4 149 35.4 35.3 101 WHISKEY CREEK 6800 19.9 13.6 146 28.2 25.4 112 WHITE MILL 8700 30.7 26.0 119 28.7 33.3 87 WOLVERINE 7650 6.0 6.8 90 15.1 15.6 97 ----- ----- Basin wide percent of average 124 110 WIND RIVER BURROUGHS CREEK 8750 18.7 11.2 167 21.5 19.9 109 COLD SPRINGS 9630 19.4 5.8 339 23.4 13.5 173 DEER PARK 9700 26.2 -M * 32.3 -M * HOBBS PARK 10100 29.5 17.7 167 27.2 17.9 153 LITTLE WARM 9620 19.9 9.0 221 23.2 16.7 139 SOUTH PASS 9040 24.9 17.7 141 29.7 21.2 141 ST. LAWRENCE ALT 8620 14.2 4.6 309 20.7 12.9 161 TOGWOTEE PASS 9580 -M 27.7 * 33.2 32.4 103 TOWNSEND CREEK 8700 19.9 8.6 231 25.5 16.0 160 ----- ----- Basin wide percent of average 197 136 BIGHORN BASIN BALD MTN. 9375 22.4 24.2 93 22.2 21.4 104 BEAR TRAP MEADOW 7900 1.4 3.5 38 14.9 11.1 134 BLACKWATER 9780 35.0 25.5 138 29.0 21.2 138 BONE SPRINGS DIV 9350 20.2 17.9 113 21.7 18.7 117 EVENING STAR 9200 36.8 30.7 120 39.8 26.5 150 GRAVE SPRINGS 8550 11.5 11.5 100 17.4 13.0 135 KIRWIN 9550 16.4 11.4 145 19.4 13.7 141 MARQUETTE 8760 17.2 8.5 204 18.9 14.0 135 MIDDLE POWDER 7760 17.0 14.6 117 23.0 15.4 151 OWL CREEK 8975 10.5 2.8 376 12.7 8.5 150 POWDER RIVER PASS 9480 12.2 9.4 132 20.0 15.2 132 SHELL CREEK 9580 18.0 17.0 106 18.9 16.5 114 SYLVAN LAKE 8420 24.5 22.9 107 31.9 22.9 140 SYLVAN ROAD 8120 10.0 6.8 148 21.9 19.2 115 TIMBER CREEK 7950 10.5 5.0 209 16.0 10.5 152 YOUNTS PEAK 8350 21.4 17.7 122 21.2 19.7 108 ----- ----- Basin wide percent of average 125 131 SHOSHONE RIVER BLACKWATER 9780 35.0 25.5 138 29.0 21.2 138 EVENING STAR 9200 36.8 30.7 120 39.8 26.5 150 KIRWIN 9550 16.4 11.4 145 19.4 13.7 141 MARQUETTE 8760 17.2 8.5 204 18.9 14.0 135 SYLVAN LAKE 8420 24.5 22.9 107 31.9 22.9 140 SYLVAN ROAD 8120 10.0 6.8 148 21.9 19.2 115 YOUNTS PEAK 8350 21.4 17.7 122 21.2 19.7 108 ----- ----- Basin wide percent of average 131 133 POWDER-TONGUE BEAR TRAP MEADOW 7900 1.4 3.5 38 14.9 11.1 134 BIG GOOSE 7990 10.0 -M * 17.4 -M * BONE SPRINGS DIV 9350 20.2 17.9 113 21.7 18.7 117 BURGESS JUNCTION 7880 10.7 13.0 83 16.0 15.0 108 CLOUD PEAK RESERVOIR 9860 24.2 17.4 140 23.9 17.7 135 DOME LAKE 8880 -M 13.7 * 16.9 16.9 100 GRAVE SPRINGS 8550 11.5 11.5 100 17.4 13.0 135 HANSEN SAWMILL 8760 5.6 6.1 92 15.6 10.7 146 MIDDLE POWDER 7760 17.0 14.6 117 23.0 15.4 151 POWDER RIVER PASS 9480 12.2 9.4 132 20.0 15.2 132 SUCKER CREEK 8880 14.0 13.0 109 19.7 17.2 115 TIE CREEK 6870 -M -M * -M 14.4 * ----- ----- Basin wide percent of average 110 126 BELLE FOURCHE BLIND PARK 6890 .0 8.2 0 18.4 14.5 128 NORTH RAPID CREEK 6130 .3 -M * 16.7 -M * WARREN PEAK 6520 3.8 8.2 47 -M 10.7 * ----- ----- Basin wide percent of average 24 128* UPPER N. PLATTE RIVER COLUMBINE 9400 17.0 19.9 86 28.4 28.5 100 DIVIDE PEAK 8800 21.5 17.4 124 30.7 27.9 111 ELK RIVER 8700 14.2 14.0 102 26.7 22.5 119 JOE WRIGHT 10120 23.4 24.5 96 31.5 30.9 102 NORTH FRENCH CREEK 10100 39.9 28.7 140 38.8 28.7 136 OLD BATTLE 10000 39.3 37.9 104 45.3 36.3 125 SOUTH BRUSH CREEK 8400 9.7 9.4 105 23.7 21.0 113 TOWER 10500 57.3 51.2 112 47.8 44.2 109 WEBBER SPRINGS 9200 22.2 24.5 91 32.8 31.2 106 WILLOW CREEK PASS 9540 15.7 12.9 123 15.0 15.9 95 ----- ----- Basin wide percent of average 109 112 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 28.4 27.9 103 30.9 24.4 128 CASPER MTN. 7900 13.9 16.0 87 22.7 19.4 117 DEADMAN HILL 10220 21.7 19.0 115 23.2 21.7 107 DEER PARK 9700 26.2 -M * 32.3 -M * LAPRELE CREEK 8320 .0 5.5 0 20.2 15.2 133 RENO HILL 8400 16.2 12.1 134 25.7 22.7 114 ROACH 9700 -M 17.7 * 25.4 26.4 97 SAND LAKE 10080 46.3 36.8 126 36.4 25.4 144 SOUTH PASS 9040 24.9 17.7 141 29.7 21.2 141 WINDY PEAK 7840 5.1 6.8 77 17.9 12.7 141 ----- ----- Basin wide percent of average 111 123 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 1.4 3.5 41 22.2 18.9 117 DIVIDE PEAK 8800 21.5 17.4 124 30.7 27.9 111 OLD BATTLE 10000 39.3 37.9 104 45.3 36.3 125 SANDSTONE RS 8150 6.3 7.8 82 25.0 23.4 107 WHISKEY PARK 8950 31.9 28.4 113 36.7 34.7 106 ----- ----- Basin wide percent of average 106 114 UPPER GREEN RIVER BIG SANDY OPENING 9100 15.9 12.9 124 18.4 18.9 98 BLIND BULL SUM 8650 32.4 22.7 143 26.9 27.4 99 EAST RIM DIVIDE 7930 14.9 14.4 104 17.4 17.7 99 ELKHART PARK G.S. 9400 16.2 13.0 125 18.4 18.5 99 GROS VENTRE SUMMIT 8775 16.4 13.0 128 18.7 18.4 102 KENDALL R.S. 7740 11.5 7.6 152 19.2 17.9 108 LOOMIS PARK 8240 -M 14.1 * 24.0 21.9 111 NEW FORK LAKE 8340 12.1 8.4 146 15.0 16.7 90 SNIDER BASIN 8250 19.7 11.9 167 22.2 17.5 127 SPRING CREEK DIVIDE 9000 37.3 28.7 131 34.5 31.2 111 TRIPLE PEAK 8500 31.9 24.0 133 37.3 35.5 105 ----- ----- Basin wide percent of average 134 105 LOWER GREEN RIVER HAMS FORK 7840 10.0 4.1 244 17.5 15.5 113 HEWINTA 9500 13.5 3.8 353 18.9 16.7 113 HICKERSON PARK 9150 6.6 2.3 287 14.5 12.7 114 HOLE-IN-ROCK 9150 9.0 1.9 500 14.6 12.7 115 INDIAN CREEK 9425 37.8 27.9 136 32.8 29.7 111 KELLEY R.S. 8180 16.9 13.6 124 23.4 21.7 108 STEEL CREEK PARK 10100 21.2 18.4 116 22.5 16.7 136 ----- ----- Basin wide percent of average 161 115 UPPER BEAR RIVER BUG LAKE 7950 25.9 14.5 180 28.2 22.9 123 HAYDEN FORK 9400 15.0 5.0 299 27.4 23.5 117 KELLEY R.S. 8180 16.9 13.6 124 23.4 21.7 108 LILY LAKE 9050 14.1 8.0 179 23.7 18.5 128 MONTE CRISTO 8960 38.8 25.0 156 36.3 30.9 118 SALT RIVER SUMMIT 7600 13.5 7.8 174 21.5 19.5 111 TRIAL LAKE 9960 27.9 23.2 120 30.2 28.9 105 ----- ----- Basin wide percent of average 157 115 ----------------------------------------------------------------------------- -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.