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 21 , 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 14.0 211 37.5 24.4 154 COTTONWOOD CREEK 7600 30.6 22.1 138 35.1 27.4 128 GRANITE CREEK 6770 26.9 16.0 168 34.3 25.9 132 GRASSY LAKE 7265 48.8 36.3 134 58.1 40.6 143 GROS VENTRE SUMMIT 8775 23.2 15.2 153 22.3 17.5 127 LEWIS LAKE DIVIDE 7860 53.3 35.9 148 60.2 41.3 146 PHILLIPS BENCH 8200 40.7 30.4 134 48.4 32.6 148 SALT RIVER SUMMIT 7600 20.9 12.7 165 25.0 18.6 134 SNAKE RIVER STATION 6920 26.7 17.8 150 38.8 28.5 136 SPRING CREEK DIVIDE 9000 39.2 29.5 133 34.4 29.9 115 THUMB DIVIDE 7980 32.2 16.5 195 35.2 22.8 154 TOGWOTEE PASS 9580 36.2 27.5 132 36.5 30.9 118 TWO OCEAN PLATEAU 9360 48.3 27.0 179 -M 33.6 * WILLOW CREEK 8450 40.0 31.8 126 46.6 35.1 133 ----- ----- Basin wide percent of average 149 136 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 37.3 25.7 145 32.1 20.2 159 BLACK BEAR 7950 -M 40.1 * -M 44.8 * CANYON 7940 23.4 12.5 187 -M 15.7 * FISHER CREEK 9100 58.8 38.2 154 -M 40.5 * MADISON PLATEAU 7750 46.7 24.9 188 44.3 28.8 154 NORTHEAST ENTRANCE 7350 10.5 7.8 135 21.2 13.2 161 PARKER PEAK 9400 34.0 23.4 145 -M 17.4 * SYLVAN LAKE 8420 32.5 23.9 136 34.9 21.3 164 THUMB DIVIDE 7980 32.2 16.5 195 35.2 22.8 154 TWO OCEAN PLATEAU 9360 48.3 27.0 179 -M 33.6 * WHISKEY CREEK 6800 25.3 17.1 148 33.4 24.0 139 WHITE MILL 8700 -M 26.0 * -M 31.3 * WOLVERINE 7650 13.4 10.4 129 17.0 14.4 118 ----- ----- Basin wide percent of average 159 151 WIND RIVER BURROUGHS CREEK 8750 24.3 14.4 169 27.5 18.5 149 CHRISTINA LAKE 9980 21.1 17.2 123 24.8 19.0 131 COLD SPRINGS 9630 8.8 8.0 110 13.6 12.3 111 HOBBS PARK 10100 18.2 17.1 106 15.8 16.3 97 LITTLE WARM 9620 18.3 12.3 149 21.6 15.3 141 SOUTH PASS 9040 25.5 17.8 143 26.3 19.4 136 ST. LAWRENCE ALT 8620 9.0 6.5 138 12.8 11.7 109 TOGWOTEE PASS 9580 36.2 27.5 132 36.5 30.9 118 TOWNSEND CREEK 8700 10.5 10.1 104 13.9 14.5 96 ----- ----- Basin wide percent of average 131 122 BIGHORN BASIN BALD MTN. 9375 24.3 23.0 106 20.6 19.7 105 BEAR TRAP MEADOW 7900 6.8 5.9 115 11.1 9.8 113 BLACKWATER 9780 40.8 25.1 163 31.5 19.8 159 BONE SPRINGS DIV 9350 20.2 18.2 111 19.5 17.1 114 EVENING STAR 9200 42.9 29.8 144 42.6 24.8 172 GRAVE SPRINGS 8550 12.9 -M * 13.0 11.5 113 KIRWIN 9550 16.2 11.3 143 17.6 12.5 141 LOST CREEK 8080 18.7 15.4 121 18.0 13.9 129 MARQUETTE 8760 12.8 8.7 147 13.6 12.2 111 MIDDLE POWDER 7760 18.5 14.1 131 16.6 13.8 120 OWL CREEK 8975 7.0 4.2 167 7.3 7.5 97 POWDER RIVER PASS 9480 -M 11.2 * 15.4 13.6 113 SHELL CREEK 9580 19.5 16.5 118 16.8 15.0 112 SYLVAN LAKE 8420 32.5 23.9 136 34.9 21.3 164 SYLVAN ROAD 8120 19.4 9.7 200 28.6 17.8 161 TIMBER CREEK 7950 7.0 6.4 109 9.1 9.0 101 YOUNTS PEAK 8350 24.3 18.3 133 -M 18.4 * ----- ----- Basin wide percent of average 135 132 SHOSHONE RIVER BLACKWATER 9780 40.8 25.1 163 31.5 19.8 159 EVENING STAR 9200 42.9 29.8 144 42.6 24.8 172 KIRWIN 9550 16.2 11.3 143 17.6 12.5 141 MARQUETTE 8760 12.8 8.7 147 13.6 12.2 111 SYLVAN LAKE 8420 32.5 23.9 136 34.9 21.3 164 SYLVAN ROAD 8120 19.4 9.7 200 28.6 17.8 161 YOUNTS PEAK 8350 24.3 18.3 133 -M 18.4 * ----- ----- Basin wide percent of average 149 156 POWDER-TONGUE BEAR TRAP MEADOW 7900 6.8 5.9 115 11.1 9.8 113 BONE SPRINGS DIV 9350 20.2 18.2 111 19.5 17.1 114 BURGESS JUNCTION 7880 15.9 13.1 121 15.9 13.4 119 CLOUD PEAK RESERVOIR 9860 19.7 17.1 115 17.5 15.8 111 DOME LAKE 8880 15.3 14.9 103 16.8 15.3 110 GRAVE SPRINGS 8550 12.9 -M * 13.0 11.5 113 HANSEN SAWMILL 8760 6.2 7.3 85 9.8 9.5 103 LOST CREEK 8080 18.7 15.4 121 18.0 13.9 129 MIDDLE POWDER 7760 18.5 14.1 131 16.6 13.8 120 POWDER RIVER PASS 9480 -M 11.2 * 15.4 13.6 113 SUCKER CREEK 8880 17.6 13.5 130 18.3 15.4 119 TIE CREEK 6870 7.2 -M * 14.9 12.9 116 ----- ----- Basin wide percent of average 116 115 BELLE FOURCHE BLIND PARK 6890 8.6 10.8 80 17.3 12.5 138 NORTH RAPID CREEK 6130 11.1 -M * 15.7 -M * WARREN PEAK 6520 20.6 10.8 191 -M 9.5 * ----- ----- Basin wide percent of average 135 138* UPPER N. PLATTE RIVER COLUMBINE 9400 29.2 23.5 124 34.8 26.9 129 DIVIDE PEAK 8800 28.8 20.9 138 27.3 25.8 106 ELK RIVER 8700 27.9 18.8 148 27.8 21.1 132 JOE WRIGHT 10120 29.9 24.4 123 32.8 28.5 115 NORTH FRENCH CREEK 10100 37.7 28.7 131 31.7 26.5 120 OLD BATTLE 10000 43.7 36.7 119 41.4 33.9 122 SOUTH BRUSH CREEK 8400 12.6 12.1 104 19.2 19.2 100 TOWER 10500 58.0 49.8 116 53.4 40.9 131 WEBBER SPRINGS 9200 31.4 27.6 114 38.8 28.8 135 WILLOW CREEK PASS 9540 22.4 13.5 166 18.2 14.5 126 ----- ----- Basin wide percent of average 126 122 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 39.1 29.0 135 30.9 22.3 139 CASPER MTN. 7900 24.2 18.6 130 23.1 17.2 134 CHRISTINA LAKE 9980 21.1 17.2 123 24.8 19.0 131 DEADMAN HILL 10220 18.6 18.3 102 21.0 19.6 107 LAPRELE CREEK 8320 14.6 8.6 170 16.3 13.7 119 RENO HILL 8400 24.2 14.7 165 23.3 21.3 109 ROACH 9700 26.1 18.1 144 24.7 24.2 102 SAND LAKE 10080 41.3 36.3 114 32.6 23.3 140 SOUTH PASS 9040 25.5 17.8 143 26.3 19.4 136 WINDY PEAK 7840 9.2 8.8 105 13.3 11.3 118 ----- ----- Basin wide percent of average 130 124 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 10.5 8.6 122 30.2 17.4 174 DIVIDE PEAK 8800 28.8 20.9 138 27.3 25.8 106 OLD BATTLE 10000 43.7 36.7 119 41.4 33.9 122 SANDSTONE RS 8150 15.4 13.2 117 23.4 21.5 109 WHISKEY PARK 8950 41.3 30.3 136 36.3 32.1 113 ----- ----- Basin wide percent of average 127 121 UPPER GREEN RIVER BIG SANDY OPENING 9100 19.4 14.8 131 18.2 17.9 102 BLIND BULL SUM 8650 42.9 27.9 154 34.6 26.1 133 EAST RIM DIVIDE 7930 17.2 14.9 115 18.0 16.7 108 ELKHART PARK G.S. 9400 18.9 14.6 129 19.5 17.6 111 GROS VENTRE SUMMIT 8775 23.2 15.2 153 22.3 17.5 127 KENDALL R.S. 7740 21.7 12.2 178 24.5 17.0 144 LOOMIS PARK 8240 -M 16.2 * 28.4 20.7 137 NEW FORK LAKE 8340 14.0 10.1 139 14.0 15.9 88 SNIDER BASIN 8250 21.9 14.6 150 20.4 16.6 123 SPRING CREEK DIVIDE 9000 39.2 29.5 133 34.4 29.9 115 TRIPLE PEAK 8500 33.8 26.2 129 40.3 33.9 119 ----- ----- Basin wide percent of average 140 119 LOWER GREEN RIVER HAMS FORK 7840 13.5 5.7 237 16.0 14.7 109 HEWINTA 9500 9.1 7.6 120 15.2 15.2 100 HICKERSON PARK 9150 11.0 5.2 212 11.4 11.4 100 HOLE-IN-ROCK 9150 9.0 4.7 191 11.8 11.4 104 INDIAN CREEK 9425 41.1 29.8 138 33.1 28.3 117 KELLEY R.S. 8180 23.1 16.6 139 31.4 20.6 152 STEEL CREEK PARK 10100 17.1 18.3 93 17.4 15.0 116 ----- ----- Basin wide percent of average 141 117 UPPER BEAR RIVER BUG LAKE 7950 31.4 18.5 170 30.6 21.6 142 HAYDEN FORK 9400 14.3 9.2 155 26.5 21.7 122 KELLEY R.S. 8180 23.1 16.6 139 31.4 20.6 152 LILY LAKE 9050 15.3 11.3 135 20.6 16.9 122 MONTE CRISTO 8960 36.4 28.1 130 34.5 28.8 120 SALT RIVER SUMMIT 7600 20.9 12.7 165 25.0 18.6 134 TRIAL LAKE 9960 34.4 25.2 137 35.5 26.9 132 ----- ----- Basin wide percent of average 145 132 ----------------------------------------------------------------------------- -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.