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 11 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 13.7 6.5 211 30.0 26.2 115 COTTONWOOD CREEK 7600 23.2 15.9 147 35.4 29.2 122 GRANITE CREEK 6770 14.5 9.0 161 27.2 27.9 98 GRASSY LAKE 7265 38.8 29.2 133 48.2 43.4 111 GROS VENTRE SUMMIT 8775 -M 11.2 * -M 18.9 * LEWIS LAKE DIVIDE 7860 37.9 31.0 123 44.8 44.2 102 PHILLIPS BENCH 8200 -M 26.7 * -M 34.8 * SALT RIVER SUMMIT 7600 -M 3.2 * -M 20.0 * SNAKE RIVER STATION 6920 11.5 13.0 89 29.4 30.5 97 SPRING CREEK DIVIDE 9000 37.3 27.2 138 35.3 31.9 111 THUMB DIVIDE 7980 -M 12.5 * -M 24.5 * TOGWOTEE PASS 9580 -M 26.7 * 34.2 33.0 104 TWO OCEAN PLATEAU 9360 41.3 26.7 155 35.8 35.9 100 WILLOW CREEK 8450 31.5 29.0 109 47.0 37.5 126 ----- ----- Basin wide percent of average 134 109 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 29.0 25.4 115 27.5 22.5 123 BLACK BEAR 7950 -M 37.9 * -M 47.9 * CANYON 7940 12.9 7.8 165 21.2 17.2 124 FISHER CREEK 9100 -M 37.8 * -M 43.8 * MADISON PLATEAU 7750 -M 20.4 * 36.9 31.0 120 NORTHEAST ENTRANCE 7350 2.9 3.7 81 16.7 14.9 113 PARKER PEAK 9400 -M 23.0 * -M 19.4 * SYLVAN LAKE 8420 25.4 21.7 118 32.3 23.7 137 THUMB DIVIDE 7980 -M 12.5 * -M 24.5 * TWO OCEAN PLATEAU 9360 41.3 26.7 155 35.8 35.9 100 WHISKEY CREEK 6800 18.7 11.2 167 28.5 25.9 111 WHITE MILL 8700 30.9 25.4 122 28.9 33.9 85 WOLVERINE 7650 2.9 4.5 65 15.4 16.2 95 ----- ----- Basin wide percent of average 130 110 WIND RIVER BURROUGHS CREEK 8750 18.4 8.7 211 22.2 20.5 108 COLD SPRINGS 9630 18.9 4.0 471 23.9 14.1 170 DEER PARK 9700 25.9 -M * 32.8 -M * HOBBS PARK 10100 29.9 17.4 173 27.9 18.5 151 LITTLE WARM 9620 20.4 7.0 295 24.2 17.4 140 SOUTH PASS 9040 24.5 17.0 145 30.2 21.7 139 ST. LAWRENCE ALT 8620 13.2 3.3 400 21.0 13.4 158 TOGWOTEE PASS 9580 -M 26.7 * 34.2 33.0 104 TOWNSEND CREEK 8700 18.9 7.1 267 25.7 16.7 155 ----- ----- Basin wide percent of average 224 135 BIGHORN BASIN BALD MTN. 9375 24.9 24.4 103 24.4 22.4 110 BEAR TRAP MEADOW 7900 1.7 2.3 70 -M 11.7 * BLACKWATER 9780 35.3 25.2 141 29.4 21.7 136 BONE SPRINGS DIV 9350 21.9 17.2 127 23.7 19.5 122 EVENING STAR 9200 36.8 30.5 121 39.8 27.2 147 GRAVE SPRINGS 8550 11.2 11.2 100 18.2 13.7 133 KIRWIN 9550 17.4 10.6 164 20.5 14.4 144 MARQUETTE 8760 17.0 8.0 216 19.5 14.9 132 MIDDLE POWDER 7760 17.7 14.4 124 23.4 16.0 147 OWL CREEK 8975 11.2 1.7 659 14.4 9.0 159 POWDER RIVER PASS 9480 12.1 7.5 162 21.4 16.0 135 SHELL CREEK 9580 19.4 17.0 114 20.4 17.2 119 SYLVAN LAKE 8420 25.4 21.7 118 32.3 23.7 137 SYLVAN ROAD 8120 -M 5.3 * -M 19.7 * TIMBER CREEK 7950 10.9 3.5 309 16.9 11.4 149 YOUNTS PEAK 8350 21.2 16.7 128 21.7 20.4 107 ----- ----- Basin wide percent of average 134 132 SHOSHONE RIVER BLACKWATER 9780 35.3 25.2 141 29.4 21.7 136 EVENING STAR 9200 36.8 30.5 121 39.8 27.2 147 KIRWIN 9550 17.4 10.6 164 20.5 14.4 144 MARQUETTE 8760 17.0 8.0 216 19.5 14.9 132 SYLVAN LAKE 8420 25.4 21.7 118 32.3 23.7 137 SYLVAN ROAD 8120 -M 5.3 * -M 19.7 * YOUNTS PEAK 8350 21.2 16.7 128 21.7 20.4 107 ----- ----- Basin wide percent of average 136 134 POWDER-TONGUE BEAR TRAP MEADOW 7900 1.7 2.3 70 -M 11.7 * BIG GOOSE 7990 9.9 -M * 18.2 -M * BONE SPRINGS DIV 9350 21.9 17.2 127 23.7 19.5 122 BURGESS JUNCTION 7880 11.9 11.9 100 17.5 15.5 113 CLOUD PEAK RESERVOIR 9860 24.7 16.7 149 24.9 18.5 135 DOME LAKE 8880 -M 11.7 * 17.7 17.7 100 GRAVE SPRINGS 8550 11.2 11.2 100 18.2 13.7 133 HANSEN SAWMILL 8760 4.5 5.0 92 17.2 11.2 154 MIDDLE POWDER 7760 17.7 14.4 124 23.4 16.0 147 POWDER RIVER PASS 9480 12.1 7.5 162 21.4 16.0 135 SUCKER CREEK 8880 14.9 11.5 129 21.4 17.9 121 TIE CREEK 6870 -M -M * -M 15.0 * ----- ----- Basin wide percent of average 124 128 BELLE FOURCHE BLIND PARK 6890 .5 6.1 7 19.2 15.4 125 NORTH RAPID CREEK 6130 .3 -M * 17.2 -M * WARREN PEAK 6520 1.7 6.1 28 -M 11.4 * ----- ----- Basin wide percent of average 18 125* UPPER N. PLATTE RIVER COLUMBINE 9400 15.5 16.4 95 29.0 29.2 100 DIVIDE PEAK 8800 19.9 14.5 137 31.7 28.5 111 ELK RIVER 8700 11.2 10.9 104 27.9 22.9 122 JOE WRIGHT 10120 23.5 24.0 98 33.3 31.9 105 NORTH FRENCH CREEK 10100 40.7 27.5 148 40.0 29.4 137 OLD BATTLE 10000 39.8 37.3 107 46.8 37.0 127 SOUTH BRUSH CREEK 8400 9.7 7.3 133 25.7 21.5 120 TOWER 10500 57.3 50.9 113 49.4 45.3 110 WEBBER SPRINGS 9200 20.9 22.2 95 33.8 31.7 107 WILLOW CREEK PASS 9540 15.5 11.5 135 16.0 16.4 97 ----- ----- Basin wide percent of average 115 114 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 28.4 26.2 109 31.9 24.9 129 CASPER MTN. 7900 12.9 13.1 98 23.2 20.2 115 DEADMAN HILL 10220 21.7 18.9 115 24.0 22.4 108 DEER PARK 9700 25.9 -M * 32.8 -M * LAPRELE CREEK 8320 .2 4.3 3 20.7 15.9 132 RENO HILL 8400 14.5 10.0 145 26.4 23.2 115 ROACH 9700 -M 16.7 * 26.0 27.4 96 SAND LAKE 10080 46.3 36.0 129 37.7 26.0 145 SOUTH PASS 9040 24.5 17.0 145 30.2 21.7 139 WINDY PEAK 7840 1.7 4.8 34 18.0 13.5 135 ----- ----- Basin wide percent of average 115 123 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .3 1.4 15 23.2 19.4 120 DIVIDE PEAK 8800 19.9 14.5 137 31.7 28.5 111 OLD BATTLE 10000 39.8 37.3 107 46.8 37.0 127 SANDSTONE RS 8150 3.8 4.5 83 26.2 24.0 109 WHISKEY PARK 8950 30.7 26.7 116 37.8 35.4 107 ----- ----- Basin wide percent of average 112 115 UPPER GREEN RIVER BIG SANDY OPENING 9100 14.5 11.0 131 18.7 19.2 98 BLIND BULL SUM 8650 32.3 22.5 144 27.4 27.9 99 EAST RIM DIVIDE 7930 14.6 13.5 109 17.7 18.0 99 ELKHART PARK G.S. 9400 -M 11.1 * -M 18.9 * GROS VENTRE SUMMIT 8775 -M 11.2 * -M 18.9 * KENDALL R.S. 7740 10.2 3.2 330 19.7 18.4 108 LOOMIS PARK 8240 -M 12.5 * 24.5 22.2 111 NEW FORK LAKE 8340 11.2 7.1 158 16.0 17.2 93 SNIDER BASIN 8250 -M 9.9 * -M 17.9 * SPRING CREEK DIVIDE 9000 37.3 27.2 138 35.3 31.9 111 TRIPLE PEAK 8500 -M 22.4 * -M 36.3 * ----- ----- Basin wide percent of average 143 104 LOWER GREEN RIVER HAMS FORK 7840 7.5 1.7 436 18.2 15.9 115 HEWINTA 9500 12.7 1.7 794 19.2 17.2 112 HICKERSON PARK 9150 5.6 1.4 431 14.5 13.4 109 HOLE-IN-ROCK 9150 8.6 1.2 782 14.7 13.4 111 INDIAN CREEK 9425 -M 26.2 * -M 30.2 * KELLEY R.S. 8180 15.5 11.5 134 24.0 22.2 109 STEEL CREEK PARK 10100 21.5 17.4 125 22.9 17.4 133 ----- ----- Basin wide percent of average 207 115 UPPER BEAR RIVER BUG LAKE 7950 -M 11.9 * -M 23.4 * HAYDEN FORK 9400 14.5 2.4 601 27.2 24.2 113 KELLEY R.S. 8180 15.5 11.5 134 24.0 22.2 109 LILY LAKE 9050 13.1 6.6 199 24.2 19.2 127 MONTE CRISTO 8960 38.8 23.2 168 36.8 31.4 117 SALT RIVER SUMMIT 7600 -M 3.2 * -M 20.0 * TRIAL LAKE 9960 28.2 21.9 129 30.5 29.4 104 ----- ----- Basin wide percent of average 168 113 ----------------------------------------------------------------------------- -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.