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 FRIDAY: MAY 7 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 15.1 8.2 185 29.9 25.9 116 COTTONWOOD CREEK 7600 23.4 17.5 134 34.2 28.9 119 GRANITE CREEK 6770 15.5 10.6 146 26.9 27.4 98 GRASSY LAKE 7265 40.5 31.2 131 48.0 42.8 113 GROS VENTRE SUMMIT 8775 16.4 12.4 134 18.7 18.5 102 LEWIS LAKE DIVIDE 7860 39.8 32.4 123 44.8 43.5 103 PHILLIPS BENCH 8200 35.3 27.9 127 36.4 34.3 107 SALT RIVER SUMMIT 7600 13.4 6.3 215 21.7 19.7 110 SNAKE RIVER STATION 6920 13.9 14.5 96 29.2 30.0 98 SPRING CREEK DIVIDE 9000 37.3 28.2 133 34.7 31.4 111 THUMB DIVIDE 7980 19.2 13.5 142 25.7 24.2 107 TOGWOTEE PASS 9580 -M 27.4 * 33.3 32.7 103 TWO OCEAN PLATEAU 9360 41.2 27.2 152 35.7 35.5 101 WILLOW CREEK 8450 32.2 30.2 107 45.8 37.0 124 ----- ----- Basin wide percent of average 132 108 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 29.2 25.7 114 27.5 22.0 125 BLACK BEAR 7950 55.7 38.8 144 52.8 47.3 112 CANYON 7940 14.2 9.1 157 21.2 16.9 126 FISHER CREEK 9100 41.3 38.3 109 42.2 43.3 98 MADISON PLATEAU 7750 -M 21.9 * 36.7 30.7 120 NORTHEAST ENTRANCE 7350 4.5 4.5 98 16.7 14.5 115 PARKER PEAK 9400 -M 23.4 * -M 18.9 * SYLVAN LAKE 8420 24.4 22.5 109 31.9 23.2 139 THUMB DIVIDE 7980 19.2 13.5 142 25.7 24.2 107 TWO OCEAN PLATEAU 9360 41.2 27.2 152 35.7 35.5 101 WHISKEY CREEK 6800 19.7 12.9 154 28.4 25.5 111 WHITE MILL 8700 30.9 25.9 120 28.9 33.4 87 WOLVERINE 7650 5.5 6.0 92 15.2 15.9 97 ----- ----- Basin wide percent of average 128 110 WIND RIVER BURROUGHS CREEK 8750 18.2 10.5 175 21.5 20.0 108 COLD SPRINGS 9630 18.9 5.1 369 23.4 13.7 171 DEER PARK 9700 26.2 -M * 32.3 -M * HOBBS PARK 10100 29.9 17.7 170 27.2 18.0 152 LITTLE WARM 9620 19.9 8.4 239 23.2 16.9 138 SOUTH PASS 9040 25.2 17.5 145 29.9 21.4 141 ST. LAWRENCE ALT 8620 14.5 4.3 343 20.9 13.0 161 TOGWOTEE PASS 9580 -M 27.4 * 33.3 32.7 103 TOWNSEND CREEK 8700 20.2 8.1 249 25.7 16.2 159 ----- ----- Basin wide percent of average 206 136 BIGHORN BASIN BALD MTN. 9375 22.9 24.4 94 22.5 21.7 104 BEAR TRAP MEADOW 7900 .9 3.2 26 14.9 11.4 131 BLACKWATER 9780 35.4 25.4 140 29.2 21.4 137 BONE SPRINGS DIV 9350 20.4 17.7 116 21.9 18.9 116 EVENING STAR 9200 37.0 30.7 121 39.8 26.7 150 GRAVE SPRINGS 8550 11.5 11.5 100 17.4 13.2 132 KIRWIN 9550 16.4 11.1 148 19.4 14.0 139 MARQUETTE 8760 17.2 8.2 210 19.2 14.4 135 MIDDLE POWDER 7760 17.2 14.5 118 23.2 15.5 150 OWL CREEK 8975 10.5 2.4 438 13.0 8.7 150 POWDER RIVER PASS 9480 12.5 8.7 143 20.2 15.5 131 SHELL CREEK 9580 18.2 17.0 107 19.0 16.7 114 SYLVAN LAKE 8420 24.4 22.5 109 31.9 23.2 139 SYLVAN ROAD 8120 9.7 6.3 154 21.7 19.4 113 TIMBER CREEK 7950 10.5 4.5 232 16.0 10.9 148 YOUNTS PEAK 8350 21.5 17.4 125 21.4 19.9 108 ----- ----- Basin wide percent of average 127 130 SHOSHONE RIVER BLACKWATER 9780 35.4 25.4 140 29.2 21.4 137 EVENING STAR 9200 37.0 30.7 121 39.8 26.7 150 KIRWIN 9550 16.4 11.1 148 19.4 14.0 139 MARQUETTE 8760 17.2 8.2 210 19.2 14.4 135 SYLVAN LAKE 8420 24.4 22.5 109 31.9 23.2 139 SYLVAN ROAD 8120 9.7 6.3 154 21.7 19.4 113 YOUNTS PEAK 8350 21.5 17.4 125 21.4 19.9 108 ----- ----- Basin wide percent of average 134 132 POWDER-TONGUE BEAR TRAP MEADOW 7900 .9 3.2 26 14.9 11.4 131 BIG GOOSE 7990 10.0 -M * 17.7 -M * BONE SPRINGS DIV 9350 20.4 17.7 116 21.9 18.9 116 BURGESS JUNCTION 7880 11.0 12.5 88 16.2 15.1 107 CLOUD PEAK RESERVOIR 9860 24.4 17.2 143 23.9 18.0 133 DOME LAKE 8880 -M 13.0 * 16.9 17.2 99 GRAVE SPRINGS 8550 11.5 11.5 100 17.4 13.2 132 HANSEN SAWMILL 8760 5.6 5.8 99 15.7 11.0 145 MIDDLE POWDER 7760 17.2 14.5 118 23.2 15.5 150 POWDER RIVER PASS 9480 12.5 8.7 143 20.2 15.5 131 SUCKER CREEK 8880 14.2 12.5 115 20.0 17.4 116 TIE CREEK 6870 -M -M * -M 14.5 * ----- ----- Basin wide percent of average 114 125 BELLE FOURCHE BLIND PARK 6890 .0 7.5 0 18.4 14.7 126 NORTH RAPID CREEK 6130 .3 -M * 16.7 -M * WARREN PEAK 6520 2.7 7.5 35 -M 11.0 * ----- ----- Basin wide percent of average 18 126* UPPER N. PLATTE RIVER COLUMBINE 9400 17.4 18.7 94 28.9 28.7 101 DIVIDE PEAK 8800 22.2 16.4 135 31.2 28.0 112 ELK RIVER 8700 15.2 13.0 117 27.7 22.7 123 JOE WRIGHT 10120 24.2 24.4 100 32.7 31.2 105 NORTH FRENCH CREEK 10100 41.3 28.4 146 39.8 28.9 138 OLD BATTLE 10000 40.2 37.8 107 46.2 36.5 127 SOUTH BRUSH CREEK 8400 10.4 8.6 120 25.5 21.2 121 TOWER 10500 58.0 51.0 114 48.4 44.5 109 WEBBER SPRINGS 9200 22.7 23.7 96 33.4 31.4 107 WILLOW CREEK PASS 9540 16.0 12.5 130 15.4 16.0 96 ----- ----- Basin wide percent of average 115 114 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 28.9 27.2 107 31.7 24.5 130 CASPER MTN. 7900 13.9 15.0 93 22.7 19.7 116 DEADMAN HILL 10220 22.4 18.9 119 23.7 21.9 109 DEER PARK 9700 26.2 -M * 32.3 -M * LAPRELE CREEK 8320 .0 5.1 0 20.4 15.5 133 RENO HILL 8400 16.2 11.5 143 26.2 22.9 115 ROACH 9700 -M 17.4 * 25.7 26.7 97 SAND LAKE 10080 46.3 36.5 127 37.4 25.5 147 SOUTH PASS 9040 25.2 17.5 145 29.9 21.4 141 WINDY PEAK 7840 4.8 6.1 78 18.2 13.0 141 ----- ----- Basin wide percent of average 115 124 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .6 2.8 22 22.7 19.0 119 DIVIDE PEAK 8800 22.2 16.4 135 31.2 28.0 112 OLD BATTLE 10000 40.2 37.8 107 46.2 36.5 127 SANDSTONE RS 8150 7.3 6.6 110 25.5 23.7 109 WHISKEY PARK 8950 32.9 27.9 119 37.4 34.9 108 ----- ----- Basin wide percent of average 113 115 UPPER GREEN RIVER BIG SANDY OPENING 9100 15.4 12.2 126 18.5 19.0 98 BLIND BULL SUM 8650 32.8 22.7 145 27.0 27.5 99 EAST RIM DIVIDE 7930 14.6 14.0 105 17.4 17.7 99 ELKHART PARK G.S. 9400 16.0 12.4 131 18.4 18.7 99 GROS VENTRE SUMMIT 8775 16.4 12.4 134 18.7 18.5 102 KENDALL R.S. 7740 11.0 6.1 179 19.2 18.2 107 LOOMIS PARK 8240 -M 13.5 * 24.0 21.9 110 NEW FORK LAKE 8340 11.5 8.0 145 15.2 16.9 91 SNIDER BASIN 8250 19.4 11.1 175 22.2 17.7 127 SPRING CREEK DIVIDE 9000 37.3 28.2 133 34.7 31.4 111 TRIPLE PEAK 8500 31.7 23.4 136 37.4 35.8 105 ----- ----- Basin wide percent of average 138 104 LOWER GREEN RIVER HAMS FORK 7840 9.6 3.3 291 17.7 15.6 113 HEWINTA 9500 13.7 3.2 442 18.9 16.9 112 HICKERSON PARK 9150 6.3 2.0 311 14.4 13.0 111 HOLE-IN-ROCK 9150 9.5 1.7 588 14.7 13.0 114 INDIAN CREEK 9425 38.3 27.2 141 33.0 29.9 111 KELLEY R.S. 8180 16.9 13.0 131 23.4 21.9 108 STEEL CREEK PARK 10100 21.4 18.0 119 22.7 16.9 135 ----- ----- Basin wide percent of average 170 114 UPPER BEAR RIVER BUG LAKE 7950 25.9 13.5 192 28.2 23.2 123 HAYDEN FORK 9400 15.0 4.1 366 27.4 23.7 116 KELLEY R.S. 8180 16.9 13.0 131 23.4 21.9 108 LILY LAKE 9050 13.5 7.5 181 23.7 18.7 127 MONTE CRISTO 8960 39.7 24.4 163 36.4 31.0 118 SALT RIVER SUMMIT 7600 13.4 6.3 215 21.7 19.7 110 TRIAL LAKE 9960 28.0 22.9 123 30.2 29.0 105 ----- ----- Basin wide percent of average 167 115 ----------------------------------------------------------------------------- -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.