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 12 , 1997 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 17.9 6.1 293 39.1 26.2 149 COTTONWOOD CREEK 7600 26.5 15.3 173 39.6 29.2 136 GRANITE CREEK 6770 20.0 8.5 235 35.7 27.9 128 GRASSY LAKE 7265 40.2 28.6 141 61.3 43.5 141 GROS VENTRE SUMMIT 8775 19.4 10.9 178 23.2 18.8 123 LEWIS LAKE DIVIDE 7860 50.8 30.6 166 63.8 44.2 144 PHILLIPS BENCH 8200 39.3 26.2 150 51.0 34.8 147 SALT RIVER SUMMIT 7600 12.4 2.3 539 26.7 20.0 134 SNAKE RIVER STATION 6920 12.3 12.6 98 40.9 30.5 134 SPRING CREEK DIVIDE 9000 33.0 26.8 123 37.4 31.9 117 THUMB DIVIDE 7980 21.6 12.0 180 37.1 24.5 151 TOGWOTEE PASS 9580 37.1 26.5 140 39.9 33.1 121 TWO OCEAN PLATEAU 9360 44.5 26.6 167 -M 36.0 * WILLOW CREEK 8450 39.9 28.7 139 53.5 37.5 143 ----- ----- Basin wide percent of average 159 137 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 -M 25.1 * 35.3 22.5 157 BLACK BEAR 7950 -M 37.6 * -M 48.0 * CANYON 7940 16.7 7.4 226 29.6 17.2 172 FISHER CREEK 9100 56.3 37.7 149 -M 43.9 * MADISON PLATEAU 7750 35.3 19.9 177 46.2 31.1 149 NORTHEAST ENTRANCE 7350 2.6 3.3 79 23.4 14.8 158 PARKER PEAK 9400 37.4 22.9 163 -M 19.4 * SYLVAN LAKE 8420 -M 21.3 * 37.2 23.7 157 THUMB DIVIDE 7980 21.6 12.0 180 37.1 24.5 151 TWO OCEAN PLATEAU 9360 44.5 26.6 167 -M 36.0 * WHISKEY CREEK 6800 18.4 10.7 172 35.3 25.9 136 WHITE MILL 8700 41.1 25.2 163 -M 34.0 * WOLVERINE 7650 5.5 4.1 134 19.0 16.2 117 ----- ----- Basin wide percent of average 165 150 WIND RIVER BURROUGHS CREEK 8750 20.4 8.2 249 28.9 20.5 141 CHRISTINA LAKE 9980 21.2 17.3 123 27.9 21.3 131 COLD SPRINGS 9630 5.3 3.7 143 16.6 14.2 117 HOBBS PARK 10100 21.1 17.1 123 19.6 18.6 105 LITTLE WARM 9620 14.4 6.5 222 24.4 17.4 140 SOUTH PASS 9040 23.8 16.8 142 30.2 21.8 139 ST. LAWRENCE ALT 8620 7.2 3.0 240 16.4 13.3 123 TOGWOTEE PASS 9580 37.1 26.5 140 39.9 33.1 121 TOWNSEND CREEK 8700 9.6 6.8 141 18.3 16.6 110 ----- ----- Basin wide percent of average 151 126 BIGHORN BASIN BALD MTN. 9375 25.6 24.3 105 23.0 22.4 103 BEAR TRAP MEADOW 7900 -M 2.0 * 13.0 11.8 110 BLACKWATER 9780 42.0 25.0 168 34.2 21.8 157 BONE SPRINGS DIV 9350 21.2 17.0 125 21.4 19.6 109 EVENING STAR 9200 43.7 30.4 144 46.6 27.3 171 GRAVE SPRINGS 8550 10.1 -M * 14.7 13.7 107 KIRWIN 9550 14.7 10.4 141 20.4 14.3 143 LOST CREEK 8080 20.5 14.1 145 20.5 16.3 126 MARQUETTE 8760 12.1 7.8 155 16.3 14.8 110 MIDDLE POWDER 7760 15.9 14.2 112 18.8 16.0 118 OWL CREEK 8975 -M 1.5 * 9.5 9.0 106 POWDER RIVER PASS 9480 14.9 7.1 210 17.9 15.9 113 SHELL CREEK 9580 -M 17.0 * 19.4 17.3 112 SYLVAN LAKE 8420 -M 21.3 * 37.2 23.7 157 SYLVAN ROAD 8120 8.8 4.8 183 30.4 19.7 154 TIMBER CREEK 7950 1.5 3.2 47 11.5 11.3 102 YOUNTS PEAK 8350 23.3 16.3 143 -M 20.4 * ----- ----- Basin wide percent of average 140 129 SHOSHONE RIVER BLACKWATER 9780 42.0 25.0 168 34.2 21.8 157 EVENING STAR 9200 43.7 30.4 144 46.6 27.3 171 KIRWIN 9550 14.7 10.4 141 20.4 14.3 143 MARQUETTE 8760 12.1 7.8 155 16.3 14.8 110 SYLVAN LAKE 8420 -M 21.3 * 37.2 23.7 157 SYLVAN ROAD 8120 8.8 4.8 183 30.4 19.7 154 YOUNTS PEAK 8350 23.3 16.3 143 -M 20.4 * ----- ----- Basin wide percent of average 153 152 POWDER-TONGUE BEAR TRAP MEADOW 7900 -M 2.0 * 13.0 11.8 110 BONE SPRINGS DIV 9350 21.2 17.0 125 21.4 19.6 109 BURGESS JUNCTION 7880 14.7 11.6 127 17.8 15.6 114 CLOUD PEAK RESERVOIR 9860 22.0 16.4 134 20.9 18.6 112 DOME LAKE 8880 14.2 11.3 126 19.8 17.7 112 GRAVE SPRINGS 8550 10.1 -M * 14.7 13.7 107 HANSEN SAWMILL 8760 2.2 4.6 48 12.1 11.3 107 LOST CREEK 8080 20.5 14.1 145 20.5 16.3 126 MIDDLE POWDER 7760 15.9 14.2 112 18.8 16.0 118 POWDER RIVER PASS 9480 14.9 7.1 210 17.9 15.9 113 SUCKER CREEK 8880 18.7 11.2 167 21.7 17.9 121 TIE CREEK 6870 3.5 -M * 17.8 14.9 119 ----- ----- Basin wide percent of average 134 114 BELLE FOURCHE BLIND PARK 6890 1.7 5.7 30 19.5 15.4 127 NORTH RAPID CREEK 6130 5.0 -M * 18.4 -M * WARREN PEAK 6520 15.2 5.7 267 -M 11.4 * ----- ----- Basin wide percent of average 148 127* UPPER N. PLATTE RIVER COLUMBINE 9400 20.2 15.8 128 38.5 29.1 132 DIVIDE PEAK 8800 20.4 14.0 146 29.5 28.5 104 ELK RIVER 8700 17.3 10.2 170 30.7 23.0 133 JOE WRIGHT 10120 32.9 23.9 138 37.6 31.9 118 NORTH FRENCH CREEK 10100 37.6 27.3 138 36.3 29.5 123 OLD BATTLE 10000 46.7 37.2 126 46.5 37.1 125 SOUTH BRUSH CREEK 8400 3.4 6.9 49 21.7 21.6 100 TOWER 10500 29.9 50.9 59 59.7 45.4 131 WEBBER SPRINGS 9200 29.1 21.7 134 42.5 31.7 134 WILLOW CREEK PASS 9540 21.0 11.3 186 20.4 16.4 124 ----- ----- Basin wide percent of average 118 124 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 35.8 25.8 139 34.8 25.0 139 CASPER MTN. 7900 21.4 12.6 170 27.4 20.3 135 CHRISTINA LAKE 9980 21.2 17.3 123 27.9 21.3 131 DEADMAN HILL 10220 21.7 18.7 116 24.6 22.3 110 LAPRELE CREEK 8320 6.3 4.0 158 18.2 15.9 114 RENO HILL 8400 20.2 9.6 210 26.7 23.1 116 ROACH 9700 24.5 16.5 148 27.8 27.4 101 SAND LAKE 10080 45.2 35.8 126 35.9 26.1 138 SOUTH PASS 9040 23.8 16.8 142 30.2 21.8 139 WINDY PEAK 7840 .2 4.4 5 14.0 13.4 104 ----- ----- Basin wide percent of average 136 123 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .2 1.0 20* -M 19.4 * DIVIDE PEAK 8800 20.4 14.0 146 29.5 28.5 104 OLD BATTLE 10000 46.7 37.2 126 46.5 37.1 125 SANDSTONE RS 8150 3.3 3.9 85 26.2 24.1 109 WHISKEY PARK 8950 41.5 26.2 158 41.1 35.5 116 ----- ----- Basin wide percent of average 136 114 UPPER GREEN RIVER BIG SANDY OPENING 9100 11.9 10.7 111 19.7 19.2 103 BLIND BULL SUM 8650 44.0 22.5 196 37.0 27.8 133 EAST RIM DIVIDE 7930 12.7 13.2 96 18.7 18.0 104 ELKHART PARK G.S. 9400 14.2 10.7 133 21.0 18.9 111 GROS VENTRE SUMMIT 8775 19.4 10.9 178 23.2 18.8 123 KENDALL R.S. 7740 11.9 2.3 517 25.0 18.3 137 LOOMIS PARK 8240 -M 12.1 * 29.8 22.3 134 NEW FORK LAKE 8340 5.8 6.8 85 15.6 17.1 91 SNIDER BASIN 8250 14.4 9.5 152 21.8 17.9 122 SPRING CREEK DIVIDE 9000 33.0 26.8 123 37.4 31.9 117 TRIPLE PEAK 8500 28.3 22.0 129 43.8 36.3 121 ----- ----- Basin wide percent of average 144 119 LOWER GREEN RIVER HAMS FORK 7840 4.5 1.2 375* 19.0 15.8 120 HEWINTA 9500 .3 1.1 27* 17.2 17.3 99 HICKERSON PARK 9150 .9 1.1 82 12.4 13.3 93 HOLE-IN-ROCK 9150 .1 .9 11 12.8 13.3 96 INDIAN CREEK 9425 38.7 25.8 150 37.0 30.3 122 KELLEY R.S. 8180 16.1 11.1 145 35.2 22.2 159 STEEL CREEK PARK 10100 19.2 17.1 112 19.9 17.4 114 ----- ----- Basin wide percent of average 137 118 UPPER BEAR RIVER BUG LAKE 7950 26.4 11.4 232 34.3 23.4 147 HAYDEN FORK 9400 8.0 2.0 400 29.9 24.1 124 KELLEY R.S. 8180 16.1 11.1 145 35.2 22.2 159 LILY LAKE 9050 6.6 6.3 105 23.7 19.1 124 MONTE CRISTO 8960 36.1 22.8 158 39.3 31.5 125 SALT RIVER SUMMIT 7600 12.4 2.3 539 26.7 20.0 134 TRIAL LAKE 9960 32.2 21.6 149 38.9 29.5 132 ----- ----- Basin wide percent of average 178 134 ----------------------------------------------------------------------------- -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.