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 MONDAY: MAY 10 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 14.5 7.0 206 30.0 26.0 116 COTTONWOOD CREEK 7600 22.9 16.2 142 34.9 29.2 120 GRANITE CREEK 6770 14.7 9.5 157 27.2 27.7 99 GRASSY LAKE 7265 39.8 29.7 135 47.9 43.3 111 GROS VENTRE SUMMIT 8775 -M 11.5 * -M 18.7 * LEWIS LAKE DIVIDE 7860 38.3 31.4 122 44.7 44.0 102 PHILLIPS BENCH 8200 34.0 26.9 127 36.7 34.8 106 SALT RIVER SUMMIT 7600 12.0 3.9 306 21.9 19.9 110 SNAKE RIVER STATION 6920 12.7 13.4 96 29.4 30.4 97 SPRING CREEK DIVIDE 9000 37.2 27.4 136 35.2 31.7 111 THUMB DIVIDE 7980 17.2 12.6 136 25.7 24.4 105 TOGWOTEE PASS 9580 -M 26.9 * 34.2 32.9 104 TWO OCEAN PLATEAU 9360 41.0 26.9 153 35.8 35.8 100 WILLOW CREEK 8450 31.4 29.4 108 46.7 37.4 125 ----- ----- Basin wide percent of average 135 108 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 28.9 25.4 114 27.5 22.4 123 BLACK BEAR 7950 54.7 38.0 144 52.8 47.8 111 CANYON 7940 12.9 8.1 159 21.2 17.2 124 FISHER CREEK 9100 40.8 37.9 108 42.3 43.7 97 MADISON PLATEAU 7750 -M 20.7 * 36.7 30.9 119 NORTHEAST ENTRANCE 7350 3.2 3.8 82 16.7 14.7 113 PARKER PEAK 9400 26.4 23.2 115 -M 19.2 * SYLVAN LAKE 8420 24.7 21.9 113 32.0 23.5 137 THUMB DIVIDE 7980 17.2 12.6 136 25.7 24.4 105 TWO OCEAN PLATEAU 9360 41.0 26.9 153 35.8 35.8 100 WHISKEY CREEK 6800 18.7 11.6 162 28.4 25.7 111 WHITE MILL 8700 30.7 25.5 121 28.9 33.8 86 WOLVERINE 7650 2.9 5.0 60 15.2 16.2 95 ----- ----- Basin wide percent of average 126 109 WIND RIVER BURROUGHS CREEK 8750 18.4 9.1 202 22.2 20.4 109 COLD SPRINGS 9630 18.7 4.3 435 23.9 14.0 171 DEER PARK 9700 25.7 -M * 32.5 -M * HOBBS PARK 10100 29.9 17.4 173 27.7 18.4 151 LITTLE WARM 9620 20.4 7.3 282 24.2 17.2 141 SOUTH PASS 9040 24.4 17.2 143 30.0 21.7 139 ST. LAWRENCE ALT 8620 13.2 3.5 378 21.0 13.2 160 TOGWOTEE PASS 9580 -M 26.9 * 34.2 32.9 104 TOWNSEND CREEK 8700 18.9 7.5 255 25.7 16.5 156 ----- ----- Basin wide percent of average 218 136 BIGHORN BASIN BALD MTN. 9375 24.4 24.4 100 24.0 22.2 109 BEAR TRAP MEADOW 7900 1.0 2.5 41 15.6 11.6 135 BLACKWATER 9780 35.3 25.2 140 29.2 21.7 136 BONE SPRINGS DIV 9350 21.2 17.4 123 23.2 19.4 120 EVENING STAR 9200 36.7 30.5 121 39.9 27.2 148 GRAVE SPRINGS 8550 10.9 11.4 96 17.9 13.6 131 KIRWIN 9550 17.4 10.7 163 20.5 14.2 145 MARQUETTE 8760 16.9 8.0 212 19.4 14.7 132 MIDDLE POWDER 7760 16.7 14.4 117 23.4 15.9 148 OWL CREEK 8975 11.2 1.9 590 -M 9.0 * POWDER RIVER PASS 9480 11.7 7.8 150 20.9 15.9 133 SHELL CREEK 9580 18.5 17.0 109 19.5 17.2 115 SYLVAN LAKE 8420 24.7 21.9 113 32.0 23.5 137 SYLVAN ROAD 8120 8.5 5.5 156 21.9 19.7 112 TIMBER CREEK 7950 10.6 3.8 279 16.7 11.2 149 YOUNTS PEAK 8350 21.2 16.7 127 21.5 20.2 107 ----- ----- Basin wide percent of average 131 129 SHOSHONE RIVER BLACKWATER 9780 35.3 25.2 140 29.2 21.7 136 EVENING STAR 9200 36.7 30.5 121 39.9 27.2 148 KIRWIN 9550 17.4 10.7 163 20.5 14.2 145 MARQUETTE 8760 16.9 8.0 212 19.4 14.7 132 SYLVAN LAKE 8420 24.7 21.9 113 32.0 23.5 137 SYLVAN ROAD 8120 8.5 5.5 156 21.9 19.7 112 YOUNTS PEAK 8350 21.2 16.7 127 21.5 20.2 107 ----- ----- Basin wide percent of average 136 131 POWDER-TONGUE BEAR TRAP MEADOW 7900 1.0 2.5 41 15.6 11.6 135 BIG GOOSE 7990 9.5 -M * 17.7 -M * BONE SPRINGS DIV 9350 21.2 17.4 123 23.2 19.4 120 BURGESS JUNCTION 7880 11.5 12.0 96 17.2 15.5 112 CLOUD PEAK RESERVOIR 9860 24.4 16.7 146 24.4 18.4 133 DOME LAKE 8880 -M 12.0 * 17.4 17.7 99 GRAVE SPRINGS 8550 10.9 11.4 96 17.9 13.6 131 HANSEN SAWMILL 8760 4.0 5.1 79 16.5 11.1 149 MIDDLE POWDER 7760 16.7 14.4 117 23.4 15.9 148 POWDER RIVER PASS 9480 11.7 7.8 150 20.9 15.9 133 SUCKER CREEK 8880 14.4 11.7 123 20.9 17.7 118 TIE CREEK 6870 -M -M * -M 14.9 * ----- ----- Basin wide percent of average 117 126 BELLE FOURCHE BLIND PARK 6890 .2 6.5 2 18.7 15.1 124 NORTH RAPID CREEK 6130 .3 -M * 16.9 -M * WARREN PEAK 6520 1.2 6.5 19 -M 11.2 * ----- ----- Basin wide percent of average 11 124* UPPER N. PLATTE RIVER COLUMBINE 9400 15.5 17.0 92 29.2 29.0 101 DIVIDE PEAK 8800 20.2 15.0 135 31.4 28.4 111 ELK RIVER 8700 11.1 11.4 99 28.5 22.9 125 JOE WRIGHT 10120 23.4 24.2 97 32.8 31.7 104 NORTH FRENCH CREEK 10100 41.0 27.7 149 39.8 29.4 136 OLD BATTLE 10000 39.4 37.4 106 46.3 36.9 126 SOUTH BRUSH CREEK 8400 9.9 7.6 129 25.4 21.4 119 TOWER 10500 56.9 51.0 112 48.9 45.2 109 WEBBER SPRINGS 9200 21.9 22.5 97 33.5 31.7 107 WILLOW CREEK PASS 9540 14.9 11.9 126 15.7 16.4 97 ----- ----- Basin wide percent of average 113 114 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 28.9 26.4 110 31.9 24.9 129 CASPER MTN. 7900 12.4 13.6 91 22.9 20.0 115 DEADMAN HILL 10220 21.5 18.9 115 23.9 22.2 108 DEER PARK 9700 25.7 -M * 32.5 -M * LAPRELE CREEK 8320 .0 4.5 0 20.7 15.7 132 RENO HILL 8400 14.1 10.5 136 26.2 23.0 114 ROACH 9700 -M 16.9 * 25.7 27.2 95 SAND LAKE 10080 46.3 36.2 128 37.7 25.9 146 SOUTH PASS 9040 24.4 17.2 143 30.0 21.7 139 WINDY PEAK 7840 1.9 5.1 36 18.4 13.4 138 ----- ----- Basin wide percent of average 114 123 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 1.9 0 22.7 19.2 119 DIVIDE PEAK 8800 20.2 15.0 135 31.4 28.4 111 OLD BATTLE 10000 39.4 37.4 106 46.3 36.9 126 SANDSTONE RS 8150 3.4 5.0 69 25.7 23.9 108 WHISKEY PARK 8950 31.0 26.9 116 37.5 35.3 107 ----- ----- Basin wide percent of average 110 114 UPPER GREEN RIVER BIG SANDY OPENING 9100 14.6 11.4 130 18.9 19.2 98 BLIND BULL SUM 8650 32.2 22.7 143 27.4 27.7 99 EAST RIM DIVIDE 7930 14.5 13.5 108 17.7 17.9 99 ELKHART PARK G.S. 9400 15.7 11.5 138 19.2 18.9 102 GROS VENTRE SUMMIT 8775 -M 11.5 * -M 18.7 * KENDALL R.S. 7740 10.1 3.8 266 19.9 18.4 109 LOOMIS PARK 8240 -M 12.7 * 24.5 22.2 111 NEW FORK LAKE 8340 11.2 7.3 154 16.0 17.0 94 SNIDER BASIN 8250 18.2 10.2 179 22.7 17.9 127 SPRING CREEK DIVIDE 9000 37.2 27.4 136 35.2 31.7 111 TRIPLE PEAK 8500 30.9 22.7 137 37.8 36.3 105 ----- ----- Basin wide percent of average 142 106 LOWER GREEN RIVER HAMS FORK 7840 7.5 2.2 353 18.0 15.7 115 HEWINTA 9500 12.5 1.9 653 19.2 17.2 112 HICKERSON PARK 9150 5.3 1.5 347 14.4 13.2 109 HOLE-IN-ROCK 9150 8.2 1.2 684 14.7 13.2 112 INDIAN CREEK 9425 37.9 26.4 144 33.5 30.2 111 KELLEY R.S. 8180 15.5 11.9 131 23.9 22.2 108 STEEL CREEK PARK 10100 21.4 17.5 122 22.9 17.2 133 ----- ----- Basin wide percent of average 173 114 UPPER BEAR RIVER BUG LAKE 7950 24.9 12.4 203 28.7 23.4 123 HAYDEN FORK 9400 13.9 2.9 476 27.4 24.0 114 KELLEY R.S. 8180 15.5 11.9 131 23.9 22.2 108 LILY LAKE 9050 12.9 6.8 189 23.9 19.0 126 MONTE CRISTO 8960 39.2 23.5 167 36.8 31.4 118 SALT RIVER SUMMIT 7600 12.0 3.9 306 21.9 19.9 110 TRIAL LAKE 9960 28.0 22.2 127 30.5 29.4 105 ----- ----- Basin wide percent of average 176 115 ----------------------------------------------------------------------------- -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.