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: APRIL 20 , 1997 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 29.5 14.3 206 36.6 24.3 151 COTTONWOOD CREEK 7600 30.5 22.3 137 34.3 27.3 126 GRANITE CREEK 6770 27.2 16.3 167 33.9 25.8 131 GRASSY LAKE 7265 48.8 36.6 133 57.1 40.5 141 GROS VENTRE SUMMIT 8775 23.0 15.3 150 22.1 17.4 127 LEWIS LAKE DIVIDE 7860 53.2 36.1 147 59.7 41.2 145 PHILLIPS BENCH 8200 40.8 30.5 134 48.0 32.5 148 SALT RIVER SUMMIT 7600 21.1 12.9 164 24.8 18.5 134 SNAKE RIVER STATION 6920 26.6 17.9 149 38.1 28.4 134 SPRING CREEK DIVIDE 9000 38.1 29.5 129 33.9 29.8 114 THUMB DIVIDE 7980 32.3 16.7 193 34.5 22.8 151 TOGWOTEE PASS 9580 35.7 27.4 130 36.1 30.8 117 TWO OCEAN PLATEAU 9360 47.6 26.9 177 -M 33.5 * WILLOW CREEK 8450 40.0 31.8 126 46.0 35.0 131 ----- ----- Basin wide percent of average 148 135 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 37.3 25.7 145 32.1 20.1 160 BLACK BEAR 7950 -M 40.1 * -M 44.6 * CANYON 7940 22.9 12.7 180 -M 15.6 * FISHER CREEK 9100 57.5 38.2 151 -M 40.3 * MADISON PLATEAU 7750 45.3 25.0 181 43.7 28.7 152 NORTHEAST ENTRANCE 7350 10.8 8.0 135 20.3 13.2 154 PARKER PEAK 9400 33.3 23.4 142 -M 17.3 * SYLVAN LAKE 8420 32.5 23.9 136 34.3 21.2 162 THUMB DIVIDE 7980 32.3 16.7 193 34.5 22.8 151 TWO OCEAN PLATEAU 9360 47.6 26.9 177 -M 33.5 * WHISKEY CREEK 6800 25.8 17.3 149 32.8 23.9 137 WHITE MILL 8700 40.0 26.0 154 -M 31.2 * WOLVERINE 7650 13.7 10.6 129 16.3 14.3 114 ----- ----- Basin wide percent of average 157 148 WIND RIVER BURROUGHS CREEK 8750 24.3 14.6 166 27.3 18.4 148 CHRISTINA LAKE 9980 20.7 17.1 121 24.6 18.9 130 COLD SPRINGS 9630 9.4 8.1 116 13.6 12.2 111 HOBBS PARK 10100 18.8 17.0 111 15.5 16.2 96 LITTLE WARM 9620 18.3 12.5 146 21.5 15.2 141 SOUTH PASS 9040 25.2 17.8 142 26.2 19.3 136 ST. LAWRENCE ALT 8620 9.4 6.6 142 12.7 11.7 109 TOGWOTEE PASS 9580 35.7 27.4 130 36.1 30.8 117 TOWNSEND CREEK 8700 10.8 10.1 107 14.0 14.4 97 ----- ----- Basin wide percent of average 132 122 BIGHORN BASIN BALD MTN. 9375 24.0 22.9 105 20.3 19.6 104 BEAR TRAP MEADOW 7900 6.9 6.1 113 10.9 9.7 112 BLACKWATER 9780 40.5 25.0 162 31.4 19.7 159 BONE SPRINGS DIV 9350 19.5 18.2 107 19.4 17.0 114 EVENING STAR 9200 42.4 29.7 143 41.9 24.7 170 GRAVE SPRINGS 8550 13.1 -M * 12.9 11.4 113 KIRWIN 9550 15.8 11.3 140 17.3 12.4 140 LOST CREEK 8080 18.6 15.4 121 17.7 13.8 128 MARQUETTE 8760 12.7 8.7 146 13.6 12.0 113 MIDDLE POWDER 7760 18.6 14.0 133 16.4 13.7 120 OWL CREEK 8975 7.5 4.3 174 7.4 7.4 100 POWDER RIVER PASS 9480 -M 11.3 * 15.3 13.5 113 SHELL CREEK 9580 19.4 16.5 118 16.6 14.9 111 SYLVAN LAKE 8420 32.5 23.9 136 34.3 21.2 162 SYLVAN ROAD 8120 19.3 9.9 195 28.1 17.7 159 TIMBER CREEK 7950 7.4 6.4 116 9.1 8.9 102 YOUNTS PEAK 8350 24.8 18.3 136 -M 18.3 * ----- ----- Basin wide percent of average 134 132 SHOSHONE RIVER BLACKWATER 9780 40.5 25.0 162 31.4 19.7 159 EVENING STAR 9200 42.4 29.7 143 41.9 24.7 170 KIRWIN 9550 15.8 11.3 140 17.3 12.4 140 MARQUETTE 8760 12.7 8.7 146 13.6 12.0 113 SYLVAN LAKE 8420 32.5 23.9 136 34.3 21.2 162 SYLVAN ROAD 8120 19.3 9.9 195 28.1 17.7 159 YOUNTS PEAK 8350 24.8 18.3 136 -M 18.3 * ----- ----- Basin wide percent of average 148 155 POWDER-TONGUE BEAR TRAP MEADOW 7900 6.9 6.1 113 10.9 9.7 112 BONE SPRINGS DIV 9350 19.5 18.2 107 19.4 17.0 114 BURGESS JUNCTION 7880 16.0 13.1 122 15.9 13.3 120 CLOUD PEAK RESERVOIR 9860 19.3 17.1 113 17.3 15.7 110 DOME LAKE 8880 15.3 14.9 103 16.6 15.2 109 GRAVE SPRINGS 8550 13.1 -M * 12.9 11.4 113 HANSEN SAWMILL 8760 6.3 7.4 85 9.7 9.4 103 LOST CREEK 8080 18.6 15.4 121 17.7 13.8 128 MIDDLE POWDER 7760 18.6 14.0 133 16.4 13.7 120 POWDER RIVER PASS 9480 -M 11.3 * 15.3 13.5 113 SUCKER CREEK 8880 17.5 13.5 130 18.3 15.3 120 TIE CREEK 6870 7.4 -M * 14.8 12.8 116 ----- ----- Basin wide percent of average 115 115 BELLE FOURCHE BLIND PARK 6890 9.2 11.0 84 17.1 12.4 138 NORTH RAPID CREEK 6130 11.5 -M * 15.4 -M * WARREN PEAK 6520 20.8 11.0 189 -M 9.5 * ----- ----- Basin wide percent of average 136 138* UPPER N. PLATTE RIVER COLUMBINE 9400 29.3 23.7 124 34.2 26.8 128 DIVIDE PEAK 8800 28.4 21.0 135 27.4 25.7 107 ELK RIVER 8700 28.1 19.1 147 27.7 21.0 132 JOE WRIGHT 10120 29.1 24.4 119 32.2 28.4 113 NORTH FRENCH CREEK 10100 37.7 28.6 132 31.6 26.4 120 OLD BATTLE 10000 43.6 36.6 119 41.4 33.7 123 SOUTH BRUSH CREEK 8400 13.2 12.2 108 19.2 19.0 101 TOWER 10500 57.5 49.7 116 52.7 40.6 130 WEBBER SPRINGS 9200 30.8 27.8 111 38.7 28.6 135 WILLOW CREEK PASS 9540 22.1 13.5 164 18.1 14.4 126 ----- ----- Basin wide percent of average 125 122 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 38.8 29.0 134 30.6 22.2 138 CASPER MTN. 7900 24.8 18.6 133 23.1 17.0 136 CHRISTINA LAKE 9980 20.7 17.1 121 24.6 18.9 130 DEADMAN HILL 10220 18.1 18.2 99 20.8 19.5 107 LAPRELE CREEK 8320 15.3 8.8 174 16.3 13.6 120 RENO HILL 8400 24.5 14.8 166 23.2 21.2 109 ROACH 9700 26.3 18.1 145 24.4 24.1 101 SAND LAKE 10080 41.2 36.2 114 32.5 23.2 140 SOUTH PASS 9040 25.2 17.8 142 26.2 19.3 136 WINDY PEAK 7840 9.9 8.9 111 13.3 11.2 119 ----- ----- Basin wide percent of average 131 124 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 11.7 9.0 130 30.1 17.3 174 DIVIDE PEAK 8800 28.4 21.0 135 27.4 25.7 107 OLD BATTLE 10000 43.6 36.6 119 41.4 33.7 123 SANDSTONE RS 8150 16.3 13.6 120 23.4 21.4 109 WHISKEY PARK 8950 41.5 30.4 137 36.2 31.9 113 ----- ----- Basin wide percent of average 128 122 UPPER GREEN RIVER BIG SANDY OPENING 9100 19.2 14.9 129 18.0 17.8 101 BLIND BULL SUM 8650 43.6 28.4 154 34.3 26.1 131 EAST RIM DIVIDE 7930 17.2 14.9 115 17.9 16.6 108 ELKHART PARK G.S. 9400 18.9 14.7 129 19.4 17.5 111 GROS VENTRE SUMMIT 8775 23.0 15.3 150 22.1 17.4 127 KENDALL R.S. 7740 21.9 12.3 178 24.3 17.0 143 LOOMIS PARK 8240 -M 16.3 * 28.1 20.6 136 NEW FORK LAKE 8340 14.1 10.2 138 13.9 15.8 88 SNIDER BASIN 8250 22.6 14.7 154 20.0 16.6 120 SPRING CREEK DIVIDE 9000 38.1 29.5 129 33.9 29.8 114 TRIPLE PEAK 8500 33.5 26.3 127 39.3 33.8 116 ----- ----- Basin wide percent of average 139 118 LOWER GREEN RIVER HAMS FORK 7840 13.4 5.7 235 15.6 14.7 106 HEWINTA 9500 9.6 7.8 123 15.1 15.1 100 HICKERSON PARK 9150 11.4 5.4 211 11.4 11.3 101 HOLE-IN-ROCK 9150 10.0 5.0 200 11.7 11.3 104 INDIAN CREEK 9425 40.7 29.9 136 32.9 28.2 117 KELLEY R.S. 8180 23.2 16.8 138 28.4 20.5 139 STEEL CREEK PARK 10100 17.1 18.2 94 17.3 14.9 116 ----- ----- Basin wide percent of average 141 114 UPPER BEAR RIVER BUG LAKE 7950 32.4 18.8 172 30.6 21.5 142 HAYDEN FORK 9400 14.9 9.5 157 26.3 21.6 122 KELLEY R.S. 8180 23.2 16.8 138 28.4 20.5 139 LILY LAKE 9050 15.7 11.6 135 20.5 16.8 122 MONTE CRISTO 8960 37.0 28.3 131 34.5 28.6 121 SALT RIVER SUMMIT 7600 21.1 12.9 164 24.8 18.5 134 TRIAL LAKE 9960 34.3 25.4 135 35.3 26.7 132 ----- ----- Basin wide percent of average 145 130 ----------------------------------------------------------------------------- -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.