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: APRIL 28 , 1997 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 26.0 11.7 222 37.7 25.0 151 COTTONWOOD CREEK 7600 31.5 20.6 153 36.9 28.0 132 GRANITE CREEK 6770 24.9 13.8 180 34.7 26.5 131 GRASSY LAKE 7265 47.0 34.6 136 59.0 41.5 142 GROS VENTRE SUMMIT 8775 23.2 14.3 162 22.6 17.9 126 LEWIS LAKE DIVIDE 7860 53.2 34.9 152 62.0 42.2 147 PHILLIPS BENCH 8200 42.3 29.8 142 49.4 33.3 148 SALT RIVER SUMMIT 7600 20.3 11.4 178 25.7 19.0 135 SNAKE RIVER STATION 6920 22.1 16.8 132 39.4 29.1 135 SPRING CREEK DIVIDE 9000 39.1 29.6 132 35.9 30.5 118 THUMB DIVIDE 7980 30.2 15.5 195 36.1 23.4 154 TOGWOTEE PASS 9580 36.4 28.1 130 37.2 31.6 118 TWO OCEAN PLATEAU 9360 48.8 27.4 178 -M 34.4 * WILLOW CREEK 8450 42.3 31.9 133 49.2 35.9 137 ----- ----- Basin wide percent of average 152 137 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 -M 25.9 * 33.4 20.9 160 BLACK BEAR 7950 -M 39.9 * -M 46.0 * CANYON 7940 21.5 11.4 189 -M 16.1 * FISHER CREEK 9100 59.4 38.6 154 -M 41.7 * MADISON PLATEAU 7750 43.3 24.1 180 44.8 29.6 151 NORTHEAST ENTRANCE 7350 8.8 6.5 135 21.7 13.7 158 PARKER PEAK 9400 35.1 23.6 149 -M 18.0 * SYLVAN LAKE 8420 32.2 23.8 135 35.7 22.0 162 THUMB DIVIDE 7980 30.2 15.5 195 36.1 23.4 154 TWO OCEAN PLATEAU 9360 48.8 27.4 178 -M 34.4 * WHISKEY CREEK 6800 23.0 15.8 146 33.7 24.6 137 WHITE MILL 8700 41.4 26.2 158 -M 32.2 * WOLVERINE 7650 12.3 8.8 140 17.5 15.0 117 ----- ----- Basin wide percent of average 161 149 WIND RIVER BURROUGHS CREEK 8750 23.8 13.4 178 27.9 19.1 146 CHRISTINA LAKE 9980 -M 17.8 * 26.6 19.8 134 COLD SPRINGS 9630 8.3 7.2 115 16.0 12.9 124 HOBBS PARK 10100 -M 17.7 * 17.9 17.0 105 LITTLE WARM 9620 19.3 11.0 175 23.3 16.0 146 SOUTH PASS 9040 27.4 18.0 152 28.7 20.3 141 ST. LAWRENCE ALT 8620 10.6 5.7 186 14.9 12.3 121 TOGWOTEE PASS 9580 36.4 28.1 130 37.2 31.6 118 TOWNSEND CREEK 8700 12.7 9.7 131 17.2 15.2 113 ----- ----- Basin wide percent of average 149 128 BIGHORN BASIN BALD MTN. 9375 24.8 23.8 104 21.1 20.5 103 BEAR TRAP MEADOW 7900 5.1 4.7 109 11.6 10.4 112 BLACKWATER 9780 41.9 25.5 164 32.6 20.4 160 BONE SPRINGS DIV 9350 19.8 18.3 108 19.6 17.8 110 EVENING STAR 9200 44.2 30.5 145 44.1 25.6 172 GRAVE SPRINGS 8550 12.7 -M * 13.5 12.1 112 KIRWIN 9550 16.9 11.6 146 18.5 13.1 141 LOST CREEK 8080 19.8 15.7 126 18.5 14.7 126 MARQUETTE 8760 13.6 8.6 158 14.5 13.1 111 MIDDLE POWDER 7760 18.4 14.6 126 17.2 14.5 119 OWL CREEK 8975 6.9 3.6 192 8.3 7.9 105 POWDER RIVER PASS 9480 -M 10.7 * 15.9 14.4 110 SHELL CREEK 9580 20.1 16.9 119 17.3 15.6 111 SYLVAN LAKE 8420 32.2 23.8 135 35.7 22.0 162 SYLVAN ROAD 8120 16.3 8.4 194 29.3 18.4 159 TIMBER CREEK 7950 7.0 6.1 115 10.3 9.7 106 YOUNTS PEAK 8350 24.5 18.3 134 -M 19.0 * ----- ----- Basin wide percent of average 135 131 SHOSHONE RIVER BLACKWATER 9780 41.9 25.5 164 32.6 20.4 160 EVENING STAR 9200 44.2 30.5 145 44.1 25.6 172 KIRWIN 9550 16.9 11.6 146 18.5 13.1 141 MARQUETTE 8760 13.6 8.6 158 14.5 13.1 111 SYLVAN LAKE 8420 32.2 23.8 135 35.7 22.0 162 SYLVAN ROAD 8120 16.3 8.4 194 29.3 18.4 159 YOUNTS PEAK 8350 24.5 18.3 134 -M 19.0 * ----- ----- Basin wide percent of average 150 155 POWDER-TONGUE BEAR TRAP MEADOW 7900 5.1 4.7 109 11.6 10.4 112 BONE SPRINGS DIV 9350 19.8 18.3 108 19.6 17.8 110 BURGESS JUNCTION 7880 16.1 13.4 120 16.3 14.1 116 CLOUD PEAK RESERVOIR 9860 20.4 17.5 117 18.3 16.7 110 DOME LAKE 8880 15.3 15.0 102 17.1 16.1 106 GRAVE SPRINGS 8550 12.7 -M * 13.5 12.1 112 HANSEN SAWMILL 8760 5.5 7.0 79 10.2 10.1 101 LOST CREEK 8080 19.8 15.7 126 18.5 14.7 126 MIDDLE POWDER 7760 18.4 14.6 126 17.2 14.5 119 POWDER RIVER PASS 9480 -M 10.7 * 15.9 14.4 110 SUCKER CREEK 8880 17.4 13.7 127 18.9 16.2 117 TIE CREEK 6870 6.4 -M * 15.3 13.5 113 ----- ----- Basin wide percent of average 115 113 BELLE FOURCHE BLIND PARK 6890 7.2 10.0 72 18.0 13.4 134 NORTH RAPID CREEK 6130 -M -M * -M -M * WARREN PEAK 6520 20.5 10.0 205 -M 10.1 * ----- ----- Basin wide percent of average 139 134* UPPER N. PLATTE RIVER COLUMBINE 9400 27.7 22.5 123 35.6 27.7 129 DIVIDE PEAK 8800 27.6 19.8 139 27.6 26.9 103 ELK RIVER 8700 24.9 17.0 146 28.4 21.8 130 JOE WRIGHT 10120 32.8 24.6 133 34.5 29.8 116 NORTH FRENCH CREEK 10100 38.8 29.2 133 33.1 27.6 120 OLD BATTLE 10000 44.9 37.8 119 42.4 35.2 120 SOUTH BRUSH CREEK 8400 10.4 11.1 94 19.7 20.2 98 TOWER 10500 59.4 50.7 117 54.7 42.5 129 WEBBER SPRINGS 9200 32.1 26.5 121 39.4 30.1 131 WILLOW CREEK PASS 9540 23.0 13.5 170 18.7 15.1 124 ----- ----- Basin wide percent of average 127 121 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 41.0 28.9 142 32.5 23.4 139 CASPER MTN. 7900 24.2 18.0 134 24.2 18.3 132 CHRISTINA LAKE 9980 -M 17.8 * 26.6 19.8 134 DEADMAN HILL 10220 22.0 18.9 116 22.6 20.7 109 LAPRELE CREEK 8320 12.2 7.0 174 16.4 14.4 114 RENO HILL 8400 23.7 13.8 172 23.9 22.1 108 ROACH 9700 26.0 18.1 144 25.6 25.3 101 SAND LAKE 10080 43.4 36.9 118 34.1 24.4 140 SOUTH PASS 9040 27.4 18.0 152 28.7 20.3 141 WINDY PEAK 7840 7.2 8.2 88 13.7 11.9 115 ----- ----- Basin wide percent of average 135 124 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 6.2 5.9 105 30.6 18.2 168 DIVIDE PEAK 8800 27.6 19.8 139 27.6 26.9 103 OLD BATTLE 10000 44.9 37.8 119 42.4 35.2 120 SANDSTONE RS 8150 12.8 10.8 119 23.7 22.6 105 WHISKEY PARK 8950 43.4 29.8 146 37.0 33.4 111 ----- ----- Basin wide percent of average 130 118 UPPER GREEN RIVER BIG SANDY OPENING 9100 18.1 14.2 127 18.4 18.3 101 BLIND BULL SUM 8650 43.7 24.3 180 35.5 26.7 133 EAST RIM DIVIDE 7930 16.4 14.8 111 18.3 17.1 107 ELKHART PARK G.S. 9400 18.3 14.2 129 19.6 18.0 109 GROS VENTRE SUMMIT 8775 23.2 14.3 162 22.6 17.9 126 KENDALL R.S. 7740 18.9 11.1 170 24.6 17.4 141 LOOMIS PARK 8240 -M 15.4 * 28.8 21.2 136 NEW FORK LAKE 8340 12.2 9.4 130 14.1 16.2 87 SNIDER BASIN 8250 21.8 13.5 161 21.3 17.0 125 SPRING CREEK DIVIDE 9000 39.1 29.6 132 35.9 30.5 118 TRIPLE PEAK 8500 35.3 25.4 139 42.3 34.7 122 ----- ----- Basin wide percent of average 145 120 LOWER GREEN RIVER HAMS FORK 7840 13.0 5.7 228 18.0 15.1 119 HEWINTA 9500 8.5 6.0 142 16.1 16.0 101 HICKERSON PARK 9150 10.0 3.6 278 12.0 12.0 100 HOLE-IN-ROCK 9150 8.3 3.0 277 12.3 12.0 103 INDIAN CREEK 9425 43.0 29.2 147 35.2 28.9 122 KELLEY R.S. 8180 22.4 15.5 145 33.4 21.1 158 STEEL CREEK PARK 10100 19.0 18.7 102 18.6 15.8 118 ----- ----- Basin wide percent of average 152 120 UPPER BEAR RIVER BUG LAKE 7950 33.3 16.8 198 33.1 22.3 148 HAYDEN FORK 9400 14.3 7.4 193 28.1 22.6 124 KELLEY R.S. 8180 22.4 15.5 145 33.4 21.1 158 LILY LAKE 9050 15.0 9.5 158 22.0 17.7 124 MONTE CRISTO 8960 40.2 26.8 150 37.2 29.8 125 SALT RIVER SUMMIT 7600 20.3 11.4 178 25.7 19.0 135 TRIAL LAKE 9960 36.9 24.4 151 36.8 27.9 132 ----- ----- 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.