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 11 , 1997 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 18.9 6.5 291 39.1 26.1 150 COTTONWOOD CREEK 7600 27.6 15.7 176 39.6 29.1 136 GRANITE CREEK 6770 20.8 8.9 234 35.7 27.8 128 GRASSY LAKE 7265 41.9 29.1 144 61.3 43.3 142 GROS VENTRE SUMMIT 8775 19.9 11.2 178 23.1 18.7 124 LEWIS LAKE DIVIDE 7860 51.9 31.0 167 63.8 44.1 145 PHILLIPS BENCH 8200 40.4 26.5 152 51.0 34.7 147 SALT RIVER SUMMIT 7600 13.4 3.1 432 26.7 19.9 134 SNAKE RIVER STATION 6920 -M 12.9 * -M 30.4 * SPRING CREEK DIVIDE 9000 34.0 27.0 126 37.4 31.8 118 THUMB DIVIDE 7980 -M 12.3 * -M 24.4 * TOGWOTEE PASS 9580 37.3 26.7 140 39.9 33.0 121 TWO OCEAN PLATEAU 9360 45.0 26.7 169 -M 35.9 * WILLOW CREEK 8450 41.2 29.0 142 53.5 37.4 143 ----- ----- Basin wide percent of average 163 136 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 -M 25.2 * 35.3 22.4 158 BLACK BEAR 7950 -M 37.8 * -M 47.8 * CANYON 7940 17.3 7.8 222 29.6 17.1 173 FISHER CREEK 9100 58.8 37.8 156 -M 43.7 * MADISON PLATEAU 7750 36.5 20.3 180 46.2 31.0 149 NORTHEAST ENTRANCE 7350 3.6 3.5 103 23.4 14.7 159 PARKER PEAK 9400 38.5 23.0 167 -M 19.3 * SYLVAN LAKE 8420 -M 21.5 * 37.2 23.6 158 THUMB DIVIDE 7980 -M 12.3 * -M 24.4 * TWO OCEAN PLATEAU 9360 45.0 26.7 169 -M 35.9 * WHISKEY CREEK 6800 18.9 11.1 170 35.3 25.8 137 WHITE MILL 8700 41.8 25.3 165 -M 33.9 * WOLVERINE 7650 6.7 4.5 149 19.0 16.1 118 ----- ----- Basin wide percent of average 167 150 WIND RIVER BURROUGHS CREEK 8750 20.6 8.6 240 28.9 20.4 142 CHRISTINA LAKE 9980 21.1 17.4 121 27.8 21.2 131 COLD SPRINGS 9630 5.8 3.9 149 16.6 14.1 118 HOBBS PARK 10100 21.3 17.2 124 19.6 18.5 106 LITTLE WARM 9620 15.0 6.8 221 24.4 17.3 141 SOUTH PASS 9040 24.2 17.0 142 30.2 21.7 139 ST. LAWRENCE ALT 8620 7.7 3.3 233 16.4 13.2 124 TOGWOTEE PASS 9580 37.3 26.7 140 39.9 33.0 121 TOWNSEND CREEK 8700 9.8 7.1 138 18.4 16.5 112 ----- ----- Basin wide percent of average 151 126 BIGHORN BASIN BALD MTN. 9375 25.8 24.3 106 23.0 22.3 103 BEAR TRAP MEADOW 7900 -M 2.2 * 13.1 11.7 112 BLACKWATER 9780 42.4 25.1 169 34.3 21.7 158 BONE SPRINGS DIV 9350 21.5 17.1 126 21.4 19.4 110 EVENING STAR 9200 44.0 30.4 145 46.6 27.2 171 GRAVE SPRINGS 8550 10.5 -M * 14.8 13.6 109 KIRWIN 9550 15.2 10.6 143 20.4 14.2 144 LOST CREEK 8080 20.7 14.2 146 20.5 16.2 127 MARQUETTE 8760 12.6 7.9 159 16.3 14.7 111 MIDDLE POWDER 7760 15.9 14.2 112 18.9 15.9 119 OWL CREEK 8975 -M 1.7 * 9.5 8.9 107 POWDER RIVER PASS 9480 14.8 7.4 200 17.9 15.8 113 SHELL CREEK 9580 19.7 17.0 116 19.3 17.2 112 SYLVAN LAKE 8420 -M 21.5 * 37.2 23.6 158 SYLVAN ROAD 8120 -M 5.1 * 30.4 19.6 155 TIMBER CREEK 7950 2.6 3.5 74 11.5 11.2 103 YOUNTS PEAK 8350 23.4 16.5 142 -M 20.3 * ----- ----- Basin wide percent of average 137 130 SHOSHONE RIVER BLACKWATER 9780 42.4 25.1 169 34.3 21.7 158 EVENING STAR 9200 44.0 30.4 145 46.6 27.2 171 KIRWIN 9550 15.2 10.6 143 20.4 14.2 144 MARQUETTE 8760 12.6 7.9 159 16.3 14.7 111 SYLVAN LAKE 8420 -M 21.5 * 37.2 23.6 158 SYLVAN ROAD 8120 -M 5.1 * 30.4 19.6 155 YOUNTS PEAK 8350 23.4 16.5 142 -M 20.3 * ----- ----- Basin wide percent of average 152 153 POWDER-TONGUE BEAR TRAP MEADOW 7900 -M 2.2 * 13.1 11.7 112 BONE SPRINGS DIV 9350 21.5 17.1 126 21.4 19.4 110 BURGESS JUNCTION 7880 14.9 11.8 126 17.9 15.5 115 CLOUD PEAK RESERVOIR 9860 22.1 16.6 133 20.9 18.5 113 DOME LAKE 8880 14.7 11.6 127 19.8 17.6 112 GRAVE SPRINGS 8550 10.5 -M * 14.8 13.6 109 HANSEN SAWMILL 8760 2.5 4.8 52 12.1 11.2 108 LOST CREEK 8080 20.7 14.2 146 20.5 16.2 127 MIDDLE POWDER 7760 15.9 14.2 112 18.9 15.9 119 POWDER RIVER PASS 9480 14.8 7.4 200 17.9 15.8 113 SUCKER CREEK 8880 18.7 11.4 164 21.8 17.8 122 TIE CREEK 6870 4.1 -M * 17.9 14.8 121 ----- ----- Basin wide percent of average 134 115 BELLE FOURCHE BLIND PARK 6890 2.5 6.0 42 19.6 15.2 129 NORTH RAPID CREEK 6130 5.6 -M * 18.5 -M * WARREN PEAK 6520 15.7 6.0 262 -M 11.3 * ----- ----- Basin wide percent of average 152 129* UPPER N. PLATTE RIVER COLUMBINE 9400 21.7 16.4 132 38.5 29.0 133 DIVIDE PEAK 8800 21.6 14.4 150 29.7 28.4 105 ELK RIVER 8700 18.7 10.7 175 30.9 22.9 135 JOE WRIGHT 10120 33.9 24.0 141 37.5 31.8 118 NORTH FRENCH CREEK 10100 38.2 27.5 139 36.3 29.4 123 OLD BATTLE 10000 47.3 37.3 127 46.6 37.0 126 SOUTH BRUSH CREEK 8400 4.4 7.2 61 21.8 21.5 101 TOWER 10500 30.2 50.9 59 59.7 45.2 132 WEBBER SPRINGS 9200 30.8 22.1 139 42.6 31.6 135 WILLOW CREEK PASS 9540 21.5 11.5 187 20.3 16.3 125 ----- ----- Basin wide percent of average 121 124 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 36.8 26.0 142 34.9 24.9 140 CASPER MTN. 7900 22.0 13.1 168 27.5 20.1 137 CHRISTINA LAKE 9980 21.1 17.4 121 27.8 21.2 131 DEADMAN HILL 10220 22.0 18.7 118 24.6 22.2 111 LAPRELE CREEK 8320 6.4 4.2 152 18.3 15.8 116 RENO HILL 8400 20.5 10.0 205 26.9 23.0 117 ROACH 9700 25.3 16.6 152 27.8 27.2 102 SAND LAKE 10080 45.2 35.9 126 35.7 26.0 137 SOUTH PASS 9040 24.2 17.0 142 30.2 21.7 139 WINDY PEAK 7840 .3 4.8 6 14.2 13.3 107 ----- ----- Basin wide percent of average 137 124 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .2 1.4 14 32.9 19.3 170 DIVIDE PEAK 8800 21.6 14.4 150 29.7 28.4 105 OLD BATTLE 10000 47.3 37.3 127 46.6 37.0 126 SANDSTONE RS 8150 4.7 4.4 107 26.2 24.0 109 WHISKEY PARK 8950 42.6 26.5 161 41.1 35.4 116 ----- ----- Basin wide percent of average 139 122 UPPER GREEN RIVER BIG SANDY OPENING 9100 12.7 11.0 115 19.8 19.2 103 BLIND BULL SUM 8650 44.0 22.5 196 37.0 27.7 134 EAST RIM DIVIDE 7930 13.3 13.3 100 18.8 17.9 105 ELKHART PARK G.S. 9400 15.1 11.0 137 21.0 18.8 112 GROS VENTRE SUMMIT 8775 19.9 11.2 178 23.1 18.7 124 KENDALL R.S. 7740 12.8 3.0 427 24.9 18.3 136 LOOMIS PARK 8240 -M 12.4 * 29.8 22.2 134 NEW FORK LAKE 8340 6.7 7.0 96 15.6 17.0 92 SNIDER BASIN 8250 15.2 9.8 155 21.8 17.8 122 SPRING CREEK DIVIDE 9000 34.0 27.0 126 37.4 31.8 118 TRIPLE PEAK 8500 29.3 22.3 131 43.9 36.2 121 ----- ----- Basin wide percent of average 147 119 LOWER GREEN RIVER HAMS FORK 7840 5.5 1.6 344 19.0 15.7 121 HEWINTA 9500 .9 1.5 60 17.2 17.2 100 HICKERSON PARK 9150 2.3 1.3 177 12.4 13.2 94 HOLE-IN-ROCK 9150 .1 1.0 10 12.8 13.2 97 INDIAN CREEK 9425 39.6 26.0 152 37.0 30.2 123 KELLEY R.S. 8180 17.0 11.4 149 35.2 22.1 159 STEEL CREEK PARK 10100 19.7 17.3 114 19.9 17.3 115 ----- ----- Basin wide percent of average 142 119 UPPER BEAR RIVER BUG LAKE 7950 27.6 11.8 234 34.3 23.3 147 HAYDEN FORK 9400 9.1 2.4 379 29.9 24.0 125 KELLEY R.S. 8180 17.0 11.4 149 35.2 22.1 159 LILY LAKE 9050 7.8 6.6 118 23.7 19.0 125 MONTE CRISTO 8960 37.1 23.1 161 39.3 31.4 125 SALT RIVER SUMMIT 7600 13.4 3.1 432 26.7 19.9 134 TRIAL LAKE 9960 33.4 21.9 153 38.9 29.4 132 ----- ----- Basin wide percent of average 181 135 ----------------------------------------------------------------------------- -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.