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 WEDNESDAY: APRIL 30 , 1997 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 25.8 11.0 235 38.4 25.1 153 COTTONWOOD CREEK 7600 31.5 20.2 156 38.2 28.1 136 GRANITE CREEK 6770 25.0 13.2 189 35.2 26.7 132 GRASSY LAKE 7265 47.0 34.1 138 59.8 41.8 143 GROS VENTRE SUMMIT 8775 23.2 14.0 166 22.7 18.0 126 LEWIS LAKE DIVIDE 7860 53.8 34.6 155 62.6 42.5 147 PHILLIPS BENCH 8200 42.2 29.6 143 50.0 33.5 149 SALT RIVER SUMMIT 7600 19.9 11.0 181 26.2 19.1 137 SNAKE RIVER STATION 6920 21.9 16.5 133 40.0 29.3 137 SPRING CREEK DIVIDE 9000 39.9 29.6 135 36.5 30.7 119 THUMB DIVIDE 7980 29.3 15.2 193 36.4 23.5 155 TOGWOTEE PASS 9580 37.1 28.2 132 37.9 31.8 119 TWO OCEAN PLATEAU 9360 49.6 27.5 180 -M 34.6 * WILLOW CREEK 8450 42.9 31.9 134 51.1 36.1 142 ----- ----- Basin wide percent of average 154 139 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 -M 26.0 * 33.7 21.1 160 BLACK BEAR 7950 -M 39.8 * -M 46.3 * CANYON 7940 21.4 11.1 193 -M 16.2 * FISHER CREEK 9100 59.9 38.7 155 -M 42.0 * MADISON PLATEAU 7750 41.9 23.9 175 45.0 29.8 151 NORTHEAST ENTRANCE 7350 8.4 6.1 138 22.1 13.8 160 PARKER PEAK 9400 36.0 23.7 152 -M 18.1 * SYLVAN LAKE 8420 31.8 23.8 134 36.2 22.2 163 THUMB DIVIDE 7980 29.3 15.2 193 36.4 23.5 155 TWO OCEAN PLATEAU 9360 49.6 27.5 180 -M 34.6 * WHISKEY CREEK 6800 22.1 15.4 144 33.9 24.8 137 WHITE MILL 8700 42.0 26.3 160 -M 32.5 * WOLVERINE 7650 12.1 8.3 146 17.7 15.1 117 ----- ----- Basin wide percent of average 161 150 WIND RIVER BURROUGHS CREEK 8750 23.9 13.1 182 28.3 19.3 147 CHRISTINA LAKE 9980 21.9 17.9 122 26.8 20.0 134 COLD SPRINGS 9630 8.8 6.9 128 16.2 13.0 125 HOBBS PARK 10100 21.7 17.9 121 18.2 17.2 106 LITTLE WARM 9620 19.3 10.6 182 23.6 16.2 146 SOUTH PASS 9040 27.6 18.1 152 29.1 20.5 142 ST. LAWRENCE ALT 8620 11.0 5.5 200 15.3 12.4 123 TOGWOTEE PASS 9580 37.1 28.2 132 37.9 31.8 119 TOWNSEND CREEK 8700 12.7 9.6 132 17.2 15.4 112 ----- ----- Basin wide percent of average 144 128 BIGHORN BASIN BALD MTN. 9375 25.4 24.0 106 21.6 20.7 104 BEAR TRAP MEADOW 7900 5.0 4.4 114 11.9 10.5 113 BLACKWATER 9780 42.4 25.6 166 33.1 20.5 161 BONE SPRINGS DIV 9350 20.8 18.4 113 20.0 18.0 111 EVENING STAR 9200 44.5 30.7 145 44.7 25.8 173 GRAVE SPRINGS 8550 13.1 -M * 14.2 12.3 115 KIRWIN 9550 17.1 11.7 146 18.9 13.2 143 LOST CREEK 8080 19.9 15.8 126 19.0 14.9 128 MARQUETTE 8760 14.1 8.6 164 14.8 13.4 110 MIDDLE POWDER 7760 18.3 14.7 124 17.7 14.7 120 OWL CREEK 8975 6.8 3.5 194 8.6 8.0 108 POWDER RIVER PASS 9480 -M 10.6 * 16.6 14.6 114 SHELL CREEK 9580 20.7 17.0 122 18.0 15.8 114 SYLVAN LAKE 8420 31.8 23.8 134 36.2 22.2 163 SYLVAN ROAD 8120 16.5 8.1 204 29.8 18.5 161 TIMBER CREEK 7950 7.3 6.0 122 11.0 9.9 111 YOUNTS PEAK 8350 24.5 18.3 134 -M 19.2 * ----- ----- Basin wide percent of average 137 133 SHOSHONE RIVER BLACKWATER 9780 42.4 25.6 166 33.1 20.5 161 EVENING STAR 9200 44.5 30.7 145 44.7 25.8 173 KIRWIN 9550 17.1 11.7 146 18.9 13.2 143 MARQUETTE 8760 14.1 8.6 164 14.8 13.4 110 SYLVAN LAKE 8420 31.8 23.8 134 36.2 22.2 163 SYLVAN ROAD 8120 16.5 8.1 204 29.8 18.5 161 YOUNTS PEAK 8350 24.5 18.3 134 -M 19.2 * ----- ----- Basin wide percent of average 151 156 POWDER-TONGUE BEAR TRAP MEADOW 7900 5.0 4.4 114 11.9 10.5 113 BONE SPRINGS DIV 9350 20.8 18.4 113 20.0 18.0 111 BURGESS JUNCTION 7880 16.2 13.5 120 16.4 14.3 115 CLOUD PEAK RESERVOIR 9860 21.1 17.6 120 18.8 17.0 111 DOME LAKE 8880 15.7 15.0 105 17.9 16.3 110 GRAVE SPRINGS 8550 13.1 -M * 14.2 12.3 115 HANSEN SAWMILL 8760 5.9 6.9 86 10.8 10.2 106 LOST CREEK 8080 19.9 15.8 126 19.0 14.9 128 MIDDLE POWDER 7760 18.3 14.7 124 17.7 14.7 120 POWDER RIVER PASS 9480 -M 10.6 * 16.6 14.6 114 SUCKER CREEK 8880 18.2 13.8 132 19.1 16.4 116 TIE CREEK 6870 6.7 -M * 15.9 13.7 116 ----- ----- Basin wide percent of average 117 115 BELLE FOURCHE BLIND PARK 6890 6.7 9.7 69 18.1 13.7 132 NORTH RAPID CREEK 6130 9.5 -M * 16.9 -M * WARREN PEAK 6520 19.8 9.7 204 -M 10.2 * ----- ----- Basin wide percent of average 137 132* UPPER N. PLATTE RIVER COLUMBINE 9400 28.4 22.2 128 36.8 28.0 131 DIVIDE PEAK 8800 26.5 19.5 136 28.5 27.2 105 ELK RIVER 8700 25.1 16.5 152 29.5 22.0 134 JOE WRIGHT 10120 34.5 24.7 140 35.9 30.1 119 NORTH FRENCH CREEK 10100 39.1 29.3 133 34.4 27.9 123 OLD BATTLE 10000 47.3 38.1 124 44.1 35.5 124 SOUTH BRUSH CREEK 8400 10.3 10.8 95 20.4 20.5 100 TOWER 10500 29.3 51.0 57 56.6 43.0 132 WEBBER SPRINGS 9200 33.4 26.2 127 40.8 30.4 134 WILLOW CREEK PASS 9540 23.9 13.5 177 19.4 15.3 127 ----- ----- Basin wide percent of average 118 124 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 41.5 28.9 144 33.4 23.7 141 CASPER MTN. 7900 23.9 17.9 134 24.6 18.6 132 CHRISTINA LAKE 9980 21.9 17.9 122 26.8 20.0 134 DEADMAN HILL 10220 23.1 19.0 122 23.6 21.0 112 LAPRELE CREEK 8320 11.7 6.5 180 16.5 14.6 113 RENO HILL 8400 23.5 13.5 174 24.3 22.3 109 ROACH 9700 26.8 18.1 148 26.8 25.6 105 SAND LAKE 10080 44.8 37.1 121 35.0 24.7 142 SOUTH PASS 9040 27.6 18.1 152 29.1 20.5 142 WINDY PEAK 7840 6.2 8.0 78 13.3 12.1 110 ----- ----- Basin wide percent of average 136 125 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 5.4 5.2 104 30.7 18.4 167 DIVIDE PEAK 8800 26.5 19.5 136 28.5 27.2 105 OLD BATTLE 10000 47.3 38.1 124 44.1 35.5 124 SANDSTONE RS 8150 12.5 10.1 124 24.9 22.9 109 WHISKEY PARK 8950 43.9 29.7 148 39.0 33.8 115 ----- ----- Basin wide percent of average 132 121 UPPER GREEN RIVER BIG SANDY OPENING 9100 17.7 14.0 126 18.8 18.4 102 BLIND BULL SUM 8650 42.9 23.2 185 35.7 26.8 133 EAST RIM DIVIDE 7930 16.2 14.8 109 18.5 17.2 108 ELKHART PARK G.S. 9400 18.1 14.1 128 20.2 18.1 112 GROS VENTRE SUMMIT 8775 23.2 14.0 166 22.7 18.0 126 KENDALL R.S. 7740 18.8 10.8 174 24.7 17.5 141 LOOMIS PARK 8240 -M 15.2 * 29.3 21.3 138 NEW FORK LAKE 8340 11.8 9.2 128 14.2 16.3 87 SNIDER BASIN 8250 21.1 13.2 160 21.6 17.1 126 SPRING CREEK DIVIDE 9000 39.9 29.6 135 36.5 30.7 119 TRIPLE PEAK 8500 34.0 25.1 135 42.8 34.9 123 ----- ----- Basin wide percent of average 145 121 LOWER GREEN RIVER HAMS FORK 7840 12.8 5.7 225 18.7 15.2 123 HEWINTA 9500 8.6 5.5 156 16.8 16.2 104 HICKERSON PARK 9150 9.7 3.1 313 12.2 12.2 100 HOLE-IN-ROCK 9150 8.1 2.5 324 12.7 12.2 104 INDIAN CREEK 9425 43.0 29.0 148 36.2 29.1 124 KELLEY R.S. 8180 22.6 15.2 149 34.5 21.2 163 STEEL CREEK PARK 10100 20.0 18.8 106 19.2 16.0 120 ----- ----- Basin wide percent of average 156 123 UPPER BEAR RIVER BUG LAKE 7950 33.5 16.2 207 33.6 22.5 149 HAYDEN FORK 9400 14.6 6.9 212 29.0 22.9 127 KELLEY R.S. 8180 22.6 15.2 149 34.5 21.2 163 LILY LAKE 9050 15.5 9.0 172 22.9 17.9 128 MONTE CRISTO 8960 41.0 26.4 155 38.3 30.1 127 SALT RIVER SUMMIT 7600 19.9 11.0 181 26.2 19.1 137 TRIAL LAKE 9960 36.9 24.1 153 36.7 28.2 130 ----- ----- Basin wide percent of average 169 137 ----------------------------------------------------------------------------- -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.