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 SUNDAY: MAY 2 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 16.0 10.4 155 29.7 25.4 117 COTTONWOOD CREEK 7600 22.2 19.7 113 32.4 28.4 115 GRANITE CREEK 6770 -M 12.6 * -M 26.9 * GRASSY LAKE 7265 39.3 33.5 118 46.3 42.2 110 GROS VENTRE SUMMIT 8775 16.5 13.7 121 18.2 18.2 100 LEWIS LAKE DIVIDE 7860 38.8 34.2 114 43.5 42.8 102 PHILLIPS BENCH 8200 35.8 29.4 123 35.8 33.8 106 SALT RIVER SUMMIT 7600 13.9 10.1 137 21.2 19.4 110 SNAKE RIVER STATION 6920 14.4 16.2 89 28.5 29.5 97 SPRING CREEK DIVIDE 9000 36.0 29.4 123 33.4 30.9 109 THUMB DIVIDE 7980 -M 15.0 * -M 23.7 * TOGWOTEE PASS 9580 -M 28.2 * 32.8 32.2 103 TWO OCEAN PLATEAU 9360 39.0 27.7 142 34.9 34.9 100 WILLOW CREEK 8450 30.7 31.7 97 43.7 36.4 120 ----- ----- Basin wide percent of average 119 108 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 27.0 26.0 104 27.2 21.4 128 BLACK BEAR 7950 -M 39.8 * 50.0 46.8 108 CANYON 7940 15.4 10.6 145 21.0 16.4 129 FISHER CREEK 9100 -M 38.8 * 41.4 42.4 98 MADISON PLATEAU 7750 -M 23.5 * 35.0 30.2 117 NORTHEAST ENTRANCE 7350 5.5 5.8 97 16.4 14.0 117 PARKER PEAK 9400 27.0 23.7 114 -M 18.4 * SYLVAN LAKE 8420 24.7 23.7 105 31.4 22.5 140 THUMB DIVIDE 7980 -M 15.0 * -M 23.7 * TWO OCEAN PLATEAU 9360 39.0 27.7 142 34.9 34.9 100 WHISKEY CREEK 6800 19.9 14.9 134 26.9 25.0 108 WHITE MILL 8700 30.0 26.4 115 28.2 32.8 86 WOLVERINE 7650 7.8 7.8 99 15.0 15.4 99 ----- ----- Basin wide percent of average 118 109 WIND RIVER BURROUGHS CREEK 8750 18.7 12.5 150 21.4 19.5 110 COLD SPRINGS 9630 -M 6.6 * -M 13.2 * DEER PARK 9700 25.9 -M * 31.7 -M * HOBBS PARK 10100 29.0 18.0 162 -M 17.5 * LITTLE WARM 9620 -M 10.1 * 23.0 16.4 141 SOUTH PASS 9040 24.9 18.0 138 29.4 20.9 141 ST. LAWRENCE ALT 8620 14.4 5.3 276 20.5 12.6 163 TOGWOTEE PASS 9580 -M 28.2 * 32.8 32.2 103 TOWNSEND CREEK 8700 19.5 9.4 210 25.0 15.7 160 ----- ----- Basin wide percent of average 169 130 BIGHORN BASIN BALD MTN. 9375 21.7 24.2 90 21.9 21.0 104 BEAR TRAP MEADOW 7900 .0 4.1 22 14.1 10.9 131 BLACKWATER 9780 35.0 25.7 137 28.7 20.9 138 BONE SPRINGS DIV 9350 20.2 18.4 110 21.4 18.4 117 EVENING STAR 9200 36.2 30.9 118 39.4 26.2 151 GRAVE SPRINGS 8550 11.0 11.6 95 16.7 12.6 133 KIRWIN 9550 16.7 11.6 144 19.2 13.5 144 MARQUETTE 8760 17.2 8.6 199 18.7 13.7 137 MIDDLE POWDER 7760 16.0 14.9 108 21.9 15.0 146 OWL CREEK 8975 10.6 3.3 322 12.2 8.2 149 POWDER RIVER PASS 9480 12.5 10.2 122 19.2 15.0 129 SHELL CREEK 9580 17.7 17.0 105 18.2 16.2 113 SYLVAN LAKE 8420 24.7 23.7 105 31.4 22.5 140 SYLVAN ROAD 8120 11.0 7.8 142 21.4 18.9 114 TIMBER CREEK 7950 10.0 5.8 173 15.1 10.2 149 YOUNTS PEAK 8350 21.7 18.2 119 21.2 19.4 110 ----- ----- Basin wide percent of average 120 130 SHOSHONE RIVER BLACKWATER 9780 35.0 25.7 137 28.7 20.9 138 EVENING STAR 9200 36.2 30.9 118 39.4 26.2 151 KIRWIN 9550 16.7 11.6 144 19.2 13.5 144 MARQUETTE 8760 17.2 8.6 199 18.7 13.7 137 SYLVAN LAKE 8420 24.7 23.7 105 31.4 22.5 140 SYLVAN ROAD 8120 11.0 7.8 142 21.4 18.9 114 YOUNTS PEAK 8350 21.7 18.2 119 21.2 19.4 110 ----- ----- Basin wide percent of average 129 134 POWDER-TONGUE BEAR TRAP MEADOW 7900 .0 4.1 22 14.1 10.9 131 BIG GOOSE 7990 9.9 -M * 16.7 -M * BONE SPRINGS DIV 9350 20.2 18.4 110 21.4 18.4 117 BURGESS JUNCTION 7880 10.7 13.5 80 15.5 14.6 107 CLOUD PEAK RESERVOIR 9860 23.4 17.7 133 22.9 17.4 132 DOME LAKE 8880 -M 14.7 * 16.2 16.7 98 GRAVE SPRINGS 8550 11.0 11.6 95 16.7 12.6 133 HANSEN SAWMILL 8760 5.6 6.8 84 15.0 10.5 145 MIDDLE POWDER 7760 16.0 14.9 108 21.9 15.0 146 POWDER RIVER PASS 9480 12.5 10.2 122 19.2 15.0 129 SUCKER CREEK 8880 14.1 13.6 104 19.0 16.7 114 TIE CREEK 6870 -M -M * -M 14.0 * ----- ----- Basin wide percent of average 104 124 BELLE FOURCHE BLIND PARK 6890 .0 9.4 0 17.9 14.0 128 NORTH RAPID CREEK 6130 .9 -M * 16.5 -M * WARREN PEAK 6520 5.5 9.4 59 13.1 10.5 126 ----- ----- Basin wide percent of average 30 127 UPPER N. PLATTE RIVER COLUMBINE 9400 16.5 21.7 77 27.7 28.2 98 DIVIDE PEAK 8800 20.9 18.9 111 29.7 27.5 109 ELK RIVER 8700 14.0 15.7 89 27.2 22.2 123 JOE WRIGHT 10120 22.7 24.7 92 30.9 30.5 102 NORTH FRENCH CREEK 10100 38.4 29.4 132 37.2 28.2 132 OLD BATTLE 10000 36.9 38.3 97 43.4 35.9 121 SOUTH BRUSH CREEK 8400 9.5 10.4 93 23.0 20.7 112 TOWER 10500 55.2 51.2 108 46.3 43.5 107 WEBBER SPRINGS 9200 21.2 25.7 83 31.7 30.9 103 WILLOW CREEK PASS 9540 15.0 13.5 112 14.5 15.5 94 ----- ----- Basin wide percent of average 101 110 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 -M 28.7 * 30.0 24.0 125 CASPER MTN. 7900 13.1 17.4 76 21.2 19.0 112 DEADMAN HILL 10220 21.2 19.2 111 22.5 21.4 106 DEER PARK 9700 25.9 -M * 31.7 -M * LAPRELE CREEK 8320 .0 6.1 0 19.7 15.0 133 RENO HILL 8400 15.0 13.1 115 24.5 22.5 109 ROACH 9700 19.0 18.0 106 24.9 26.0 96 SAND LAKE 10080 46.2 37.2 125 37.2 25.0 149 SOUTH PASS 9040 24.9 18.0 138 29.4 20.9 141 WINDY PEAK 7840 6.0 7.6 79 17.7 12.5 142 ----- ----- Basin wide percent of average 107 122 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 3.0 4.5 67 21.9 18.7 118 DIVIDE PEAK 8800 20.9 18.9 111 29.7 27.5 109 OLD BATTLE 10000 36.9 38.3 97 43.4 35.9 121 SANDSTONE RS 8150 6.8 9.4 73 24.7 23.2 107 WHISKEY PARK 8950 30.7 29.4 105 35.5 34.3 104 ----- ----- Basin wide percent of average 98 112 UPPER GREEN RIVER BIG SANDY OPENING 9100 16.0 13.7 117 18.2 18.7 98 BLIND BULL SUM 8650 32.2 22.7 142 26.4 27.0 98 EAST RIM DIVIDE 7930 14.7 14.7 100 17.2 17.4 99 ELKHART PARK G.S. 9400 16.2 13.9 117 17.9 18.4 98 GROS VENTRE SUMMIT 8775 16.5 13.7 121 18.2 18.2 100 KENDALL R.S. 7740 12.0 10.0 121 19.2 17.7 108 LOOMIS PARK 8240 -M 15.0 * 23.7 21.5 111 NEW FORK LAKE 8340 12.1 9.0 136 15.1 16.5 92 SNIDER BASIN 8250 19.9 12.7 157 21.9 17.4 127 SPRING CREEK DIVIDE 9000 36.0 29.4 123 33.4 30.9 109 TRIPLE PEAK 8500 31.9 24.9 129 36.4 35.3 104 ----- ----- Basin wide percent of average 127 104 LOWER GREEN RIVER HAMS FORK 7840 10.0 5.3 189 16.9 15.4 111 HEWINTA 9500 12.7 5.0 255 18.0 16.4 110 HICKERSON PARK 9150 5.8 2.8 208 13.7 12.5 111 HOLE-IN-ROCK 9150 8.6 2.3 391 14.1 12.5 114 INDIAN CREEK 9425 37.2 28.7 130 31.9 29.4 109 KELLEY R.S. 8180 16.5 14.7 113 22.7 21.4 107 STEEL CREEK PARK 10100 20.0 18.9 107 21.5 16.4 132 ----- ----- Basin wide percent of average 143 113 UPPER BEAR RIVER BUG LAKE 7950 24.9 15.6 160 27.0 22.7 119 HAYDEN FORK 9400 13.7 6.3 221 25.4 23.2 110 KELLEY R.S. 8180 16.5 14.7 113 22.7 21.4 107 LILY LAKE 9050 13.0 8.5 152 22.4 18.2 124 MONTE CRISTO 8960 36.7 25.9 142 34.2 30.5 112 SALT RIVER SUMMIT 7600 13.9 10.1 137 21.2 19.4 110 TRIAL LAKE 9960 25.4 23.9 107 28.0 28.5 99 ----- ----- Basin wide percent of average 138 111 ----------------------------------------------------------------------------- -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.