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: APRIL 25 , 1997 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 27.8 12.7 219 37.6 24.7 152 COTTONWOOD CREEK 7600 31.5 21.2 149 36.4 27.7 131 GRANITE CREEK 6770 26.0 14.7 177 34.5 26.2 132 GRASSY LAKE 7265 46.4 35.4 131 58.2 41.1 142 GROS VENTRE SUMMIT 8775 23.3 14.7 159 22.5 17.7 127 LEWIS LAKE DIVIDE 7860 51.5 35.3 146 60.8 41.8 145 PHILLIPS BENCH 8200 41.1 30.0 137 49.2 33.0 149 SALT RIVER SUMMIT 7600 20.8 11.9 175 25.5 18.8 136 SNAKE RIVER STATION 6920 23.8 17.2 138 38.8 28.9 134 SPRING CREEK DIVIDE 9000 40.7 29.5 138 35.6 30.3 117 THUMB DIVIDE 7980 31.3 16.0 196 35.2 23.1 152 TOGWOTEE PASS 9580 36.5 27.8 131 36.7 31.3 117 TWO OCEAN PLATEAU 9360 48.3 27.2 178 -M 34.0 * WILLOW CREEK 8450 42.5 31.8 134 47.1 35.5 133 ----- ----- Basin wide percent of average 151 136 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 -M 25.8 * 32.2 20.6 156 BLACK BEAR 7950 -M 40.0 * -M 45.5 * CANYON 7940 22.3 11.9 187 -M 15.9 * FISHER CREEK 9100 58.8 38.4 153 -M 41.2 * MADISON PLATEAU 7750 44.2 24.5 180 44.3 29.3 151 NORTHEAST ENTRANCE 7350 9.8 7.1 138 21.2 13.5 157 PARKER PEAK 9400 34.7 23.5 148 -M 17.7 * SYLVAN LAKE 8420 31.5 23.8 132 34.9 21.7 161 THUMB DIVIDE 7980 31.3 16.0 196 35.2 23.1 152 TWO OCEAN PLATEAU 9360 48.3 27.2 178 -M 34.0 * WHISKEY CREEK 6800 24.1 16.3 148 33.5 24.4 137 WHITE MILL 8700 40.9 26.1 157 -M 31.8 * WOLVERINE 7650 12.5 9.5 132 16.9 14.7 115 ----- ----- Basin wide percent of average 160 148 WIND RIVER BURROUGHS CREEK 8750 24.6 13.8 178 27.8 18.9 147 CHRISTINA LAKE 9980 22.3 17.5 127 -M 19.4 * COLD SPRINGS 9630 -M 7.5 * -M 12.6 * HOBBS PARK 10100 -M 17.4 * 17.8 16.7 107 LITTLE WARM 9620 -M 11.6 * 23.2 15.7 148 SOUTH PASS 9040 -M 17.9 * -M 19.9 * ST. LAWRENCE ALT 8620 -M 6.0 * -M 12.0 * TOGWOTEE PASS 9580 36.5 27.8 131 36.7 31.3 117 TOWNSEND CREEK 8700 -M 9.8 * -M 14.9 * ----- ----- Basin wide percent of average 141* 128* BIGHORN BASIN BALD MTN. 9375 24.5 23.4 105 20.7 20.1 103 BEAR TRAP MEADOW 7900 5.9 5.2 113 11.3 10.1 112 BLACKWATER 9780 41.4 25.3 164 32.2 20.1 160 BONE SPRINGS DIV 9350 20.8 18.3 114 19.5 17.5 111 EVENING STAR 9200 43.7 30.2 145 43.4 25.3 172 GRAVE SPRINGS 8550 12.9 -M * 13.2 11.8 112 KIRWIN 9550 16.9 11.5 147 18.3 12.8 143 LOST CREEK 8080 19.1 15.6 122 18.1 14.4 126 MARQUETTE 8760 13.2 8.6 153 14.2 12.7 112 MIDDLE POWDER 7760 18.7 14.4 130 16.8 14.2 118 OWL CREEK 8975 7.4 3.9 190 8.0 7.7 104 POWDER RIVER PASS 9480 -M 10.9 * 15.6 14.1 111 SHELL CREEK 9580 19.8 16.7 119 16.9 15.3 110 SYLVAN LAKE 8420 31.5 23.8 132 34.9 21.7 161 SYLVAN ROAD 8120 17.8 9.0 198 28.6 18.1 158 TIMBER CREEK 7950 7.0 6.2 113 9.7 9.4 103 YOUNTS PEAK 8350 24.6 18.3 134 -M 18.8 * ----- ----- Basin wide percent of average 136 131 SHOSHONE RIVER BLACKWATER 9780 41.4 25.3 164 32.2 20.1 160 EVENING STAR 9200 43.7 30.2 145 43.4 25.3 172 KIRWIN 9550 16.9 11.5 147 18.3 12.8 143 MARQUETTE 8760 13.2 8.6 153 14.2 12.7 112 SYLVAN LAKE 8420 31.5 23.8 132 34.9 21.7 161 SYLVAN ROAD 8120 17.8 9.0 198 28.6 18.1 158 YOUNTS PEAK 8350 24.6 18.3 134 -M 18.8 * ----- ----- Basin wide percent of average 149 155 POWDER-TONGUE BEAR TRAP MEADOW 7900 5.9 5.2 113 11.3 10.1 112 BONE SPRINGS DIV 9350 20.8 18.3 114 19.5 17.5 111 BURGESS JUNCTION 7880 16.0 13.3 120 16.0 13.8 116 CLOUD PEAK RESERVOIR 9860 20.4 17.4 117 18.1 16.3 111 DOME LAKE 8880 15.4 14.9 103 16.9 15.8 107 GRAVE SPRINGS 8550 12.9 -M * 13.2 11.8 112 HANSEN SAWMILL 8760 5.6 7.2 78 10.0 9.8 102 LOST CREEK 8080 19.1 15.6 122 18.1 14.4 126 MIDDLE POWDER 7760 18.7 14.4 130 16.8 14.2 118 POWDER RIVER PASS 9480 -M 10.9 * 15.6 14.1 111 SUCKER CREEK 8880 17.3 13.6 127 18.4 15.8 116 TIE CREEK 6870 6.8 -M * 14.9 13.2 113 ----- ----- Basin wide percent of average 116 113 BELLE FOURCHE BLIND PARK 6890 8.3 10.3 81 17.8 13.0 137 NORTH RAPID CREEK 6130 10.7 -M * 16.3 -M * WARREN PEAK 6520 20.3 10.3 197 -M 9.8 * ----- ----- Basin wide percent of average 139 137* UPPER N. PLATTE RIVER COLUMBINE 9400 28.8 23.0 125 35.3 27.4 129 DIVIDE PEAK 8800 27.6 20.2 137 27.1 26.4 103 ELK RIVER 8700 27.4 17.8 154 28.3 21.5 132 JOE WRIGHT 10120 32.4 24.5 132 34.2 29.2 117 NORTH FRENCH CREEK 10100 38.0 28.9 131 32.7 27.1 121 OLD BATTLE 10000 44.5 37.3 119 41.8 34.6 121 SOUTH BRUSH CREEK 8400 11.7 11.5 102 19.4 19.7 98 TOWER 10500 59.2 50.3 118 54.5 41.8 130 WEBBER SPRINGS 9200 32.0 27.0 119 39.0 29.5 132 WILLOW CREEK PASS 9540 22.7 13.5 168 18.3 14.8 124 ----- ----- Basin wide percent of average 128 122 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 40.5 28.9 140 32.2 22.9 141 CASPER MTN. 7900 23.5 18.3 128 23.1 17.8 130 CHRISTINA LAKE 9980 22.3 17.5 127 -M 19.4 * DEADMAN HILL 10220 21.8 18.6 117 22.4 20.2 111 LAPRELE CREEK 8320 13.8 7.7 179 16.3 14.1 116 RENO HILL 8400 24.3 14.2 171 23.2 21.8 106 ROACH 9700 25.7 18.1 142 25.2 24.9 101 SAND LAKE 10080 42.9 36.6 117 33.6 23.9 141 SOUTH PASS 9040 -M 17.9 * -M 19.9 * WINDY PEAK 7840 8.5 8.4 101 13.3 11.7 114 ----- ----- Basin wide percent of average 133 120 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 9.2 7.1 130 30.3 17.9 169 DIVIDE PEAK 8800 27.6 20.2 137 27.1 26.4 103 OLD BATTLE 10000 44.5 37.3 119 41.8 34.6 121 SANDSTONE RS 8150 15.2 11.9 128 23.5 22.1 106 WHISKEY PARK 8950 41.0 30.0 137 36.7 32.8 112 ----- ----- Basin wide percent of average 129 119 UPPER GREEN RIVER BIG SANDY OPENING 9100 18.9 14.5 130 18.2 18.1 101 BLIND BULL SUM 8650 43.1 25.8 167 35.3 26.4 134 EAST RIM DIVIDE 7930 17.1 14.9 115 18.2 16.9 108 ELKHART PARK G.S. 9400 18.7 14.4 130 19.5 17.8 110 GROS VENTRE SUMMIT 8775 23.3 14.7 159 22.5 17.7 127 KENDALL R.S. 7740 20.4 11.5 177 24.6 17.3 142 LOOMIS PARK 8240 -M 15.8 * 28.5 21.0 136 NEW FORK LAKE 8340 13.4 9.7 138 14.0 16.1 87 SNIDER BASIN 8250 22.0 13.9 158 21.1 16.9 125 SPRING CREEK DIVIDE 9000 40.7 29.5 138 35.6 30.3 117 TRIPLE PEAK 8500 34.8 25.7 135 41.7 34.3 122 ----- ----- Basin wide percent of average 145 120 LOWER GREEN RIVER HAMS FORK 7840 13.8 5.7 242 17.8 14.9 119 HEWINTA 9500 10.0 6.7 149 16.0 15.7 102 HICKERSON PARK 9150 11.7 4.3 272 12.0 11.7 103 HOLE-IN-ROCK 9150 9.6 3.8 253 12.3 11.7 105 INDIAN CREEK 9425 42.3 29.5 143 34.8 28.7 121 KELLEY R.S. 8180 23.4 16.0 146 32.7 20.9 156 STEEL CREEK PARK 10100 18.8 18.5 102 18.3 15.4 119 ----- ----- Basin wide percent of average 153 121 UPPER BEAR RIVER BUG LAKE 7950 34.2 17.5 195 32.8 22.0 149 HAYDEN FORK 9400 15.7 8.2 191 27.6 22.2 124 KELLEY R.S. 8180 23.4 16.0 146 32.7 20.9 156 LILY LAKE 9050 17.4 10.3 169 21.7 17.4 125 MONTE CRISTO 8960 41.2 27.4 150 36.0 29.4 122 SALT RIVER SUMMIT 7600 20.8 11.9 175 25.5 18.8 136 TRIAL LAKE 9960 36.9 24.8 149 36.6 27.4 134 ----- ----- Basin wide percent of average 163 135 ----------------------------------------------------------------------------- -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.