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 FRIDAY: APRIL 18 , 1997 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 30.2 15.0 201 36.1 24.2 149 COTTONWOOD CREEK 7600 31.6 22.7 139 34.0 27.1 125 GRANITE CREEK 6770 27.6 16.9 163 33.5 25.6 131 GRASSY LAKE 7265 48.3 37.1 130 56.3 40.3 140 GROS VENTRE SUMMIT 8775 22.6 15.6 145 21.9 17.3 127 LEWIS LAKE DIVIDE 7860 53.2 36.4 146 -M 40.9 * PHILLIPS BENCH 8200 44.4 30.6 145 47.2 32.3 146 SALT RIVER SUMMIT 7600 21.8 13.2 165 24.7 18.4 134 SNAKE RIVER STATION 6920 27.3 18.2 150 37.6 28.2 133 SPRING CREEK DIVIDE 9000 37.9 29.4 129 33.7 29.6 114 THUMB DIVIDE 7980 33.6 17.0 198 34.0 22.6 150 TOGWOTEE PASS 9580 35.5 27.2 131 35.6 30.6 116 TWO OCEAN PLATEAU 9360 47.2 26.8 176 -M 33.3 * WILLOW CREEK 8450 40.9 31.7 129 45.7 34.8 131 ----- ----- Basin wide percent of average 149 133 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 37.2 25.6 145 32.0 19.9 161 BLACK BEAR 7950 -M 40.1 * -M 44.2 * CANYON 7940 23.3 13.0 179 -M 15.5 * FISHER CREEK 9100 56.8 38.1 149 -M 40.0 * MADISON PLATEAU 7750 44.4 25.3 175 43.2 28.5 152 NORTHEAST ENTRANCE 7350 11.9 8.4 142 19.9 13.0 153 PARKER PEAK 9400 32.9 23.3 141 -M 17.1 * SYLVAN LAKE 8420 32.6 23.9 136 33.9 21.0 161 THUMB DIVIDE 7980 33.6 17.0 198 34.0 22.6 150 TWO OCEAN PLATEAU 9360 47.2 26.8 176 -M 33.3 * WHISKEY CREEK 6800 25.7 17.6 146 32.2 23.7 136 WHITE MILL 8700 39.5 25.9 153 -M 30.9 * WOLVERINE 7650 -M 11.1 * 16.2 14.2 114 ----- ----- Basin wide percent of average 157 148 WIND RIVER BURROUGHS CREEK 8750 24.0 14.9 161 27.0 18.2 148 CHRISTINA LAKE 9980 20.9 16.9 124 24.2 18.7 129 COLD SPRINGS 9630 9.5 8.3 114 13.6 12.0 113 HOBBS PARK 10100 19.0 16.8 113 15.5 16.0 97 LITTLE WARM 9620 18.7 12.9 145 21.3 15.0 142 SOUTH PASS 9040 24.9 17.7 141 26.3 19.1 138 ST. LAWRENCE ALT 8620 9.6 6.8 141 12.8 11.5 111 TOGWOTEE PASS 9580 35.5 27.2 131 35.6 30.6 116 TOWNSEND CREEK 8700 10.9 10.2 107 14.0 14.2 99 ----- ----- Basin wide percent of average 131 123 BIGHORN BASIN BALD MTN. 9375 24.0 22.6 106 20.2 19.3 105 BEAR TRAP MEADOW 7900 7.6 6.4 119 10.8 9.6 113 BLACKWATER 9780 40.4 24.9 162 31.3 19.5 161 BONE SPRINGS DIV 9350 -M 18.2 * 18.7 16.8 111 EVENING STAR 9200 42.6 29.5 144 41.6 24.5 170 GRAVE SPRINGS 8550 13.5 -M * 12.6 11.2 113 KIRWIN 9550 15.7 11.2 140 17.2 12.2 141 LOST CREEK 8080 18.7 15.3 122 17.6 13.6 129 MARQUETTE 8760 12.8 8.7 147 13.6 11.8 115 MIDDLE POWDER 7760 19.0 13.8 138 16.3 13.5 121 OWL CREEK 8975 8.4 4.5 187 7.5 7.3 103 POWDER RIVER PASS 9480 -M 11.4 * 15.1 13.3 114 SHELL CREEK 9580 19.6 16.4 120 16.5 14.7 112 SYLVAN LAKE 8420 32.6 23.9 136 33.9 21.0 161 SYLVAN ROAD 8120 20.6 10.3 200 27.7 17.6 157 TIMBER CREEK 7950 8.1 6.5 125 9.1 8.7 105 YOUNTS PEAK 8350 25.1 18.3 137 -M 18.2 * ----- ----- Basin wide percent of average 139 132 SHOSHONE RIVER BLACKWATER 9780 40.4 24.9 162 31.3 19.5 161 EVENING STAR 9200 42.6 29.5 144 41.6 24.5 170 KIRWIN 9550 15.7 11.2 140 17.2 12.2 141 MARQUETTE 8760 12.8 8.7 147 13.6 11.8 115 SYLVAN LAKE 8420 32.6 23.9 136 33.9 21.0 161 SYLVAN ROAD 8120 20.6 10.3 200 27.7 17.6 157 YOUNTS PEAK 8350 25.1 18.3 137 -M 18.2 * ----- ----- Basin wide percent of average 150 155 POWDER-TONGUE BEAR TRAP MEADOW 7900 7.6 6.4 119 10.8 9.6 113 BONE SPRINGS DIV 9350 -M 18.2 * 18.7 16.8 111 BURGESS JUNCTION 7880 16.3 13.0 125 15.9 13.1 121 CLOUD PEAK RESERVOIR 9860 19.3 17.0 114 17.1 15.5 110 DOME LAKE 8880 15.9 14.8 107 16.6 15.0 111 GRAVE SPRINGS 8550 13.5 -M * 12.6 11.2 113 HANSEN SAWMILL 8760 7.0 7.5 93 9.7 9.3 104 LOST CREEK 8080 18.7 15.3 122 17.6 13.6 129 MIDDLE POWDER 7760 19.0 13.8 138 16.3 13.5 121 POWDER RIVER PASS 9480 -M 11.4 * 15.1 13.3 114 SUCKER CREEK 8880 17.5 13.4 131 18.3 15.0 122 TIE CREEK 6870 7.9 -M * 14.7 12.6 117 ----- ----- Basin wide percent of average 120 116 BELLE FOURCHE BLIND PARK 6890 10.3 11.2 92 17.1 12.2 140 NORTH RAPID CREEK 6130 12.4 -M * 15.4 -M * WARREN PEAK 6520 21.4 11.2 191 -M 9.3 * ----- ----- Basin wide percent of average 142 140* UPPER N. PLATTE RIVER COLUMBINE 9400 30.6 24.0 128 33.9 26.5 128 DIVIDE PEAK 8800 28.8 21.3 135 27.4 25.4 108 ELK RIVER 8700 29.1 19.6 148 27.9 20.8 134 JOE WRIGHT 10120 29.1 24.3 120 32.2 28.0 115 NORTH FRENCH CREEK 10100 38.8 28.4 137 31.5 26.1 121 OLD BATTLE 10000 44.0 36.2 122 41.2 33.3 124 SOUTH BRUSH CREEK 8400 14.3 12.6 113 19.2 18.7 103 TOWER 10500 57.9 49.4 117 -M 40.2 * WEBBER SPRINGS 9200 31.5 28.1 112 38.7 28.3 137 WILLOW CREEK PASS 9540 22.4 13.5 166 17.9 14.2 126 ----- ----- Basin wide percent of average 127 122 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 39.1 29.0 135 30.3 21.9 138 CASPER MTN. 7900 25.3 18.8 135 23.0 16.7 138 CHRISTINA LAKE 9980 20.9 16.9 124 24.2 18.7 129 DEADMAN HILL 10220 18.0 18.0 100 20.7 19.2 108 LAPRELE CREEK 8320 16.3 9.3 175 16.3 13.4 122 RENO HILL 8400 25.4 15.1 168 23.2 21.0 110 ROACH 9700 24.6 18.1 136 24.3 23.8 102 SAND LAKE 10080 41.3 36.0 115 32.4 22.9 141 SOUTH PASS 9040 24.9 17.7 141 26.3 19.1 138 WINDY PEAK 7840 11.2 9.0 124 13.5 11.0 123 ----- ----- Basin wide percent of average 131 125 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 14.8 9.8 151 30.0 17.1 175 DIVIDE PEAK 8800 28.8 21.3 135 27.4 25.4 108 OLD BATTLE 10000 44.0 36.2 122 41.2 33.3 124 SANDSTONE RS 8150 18.2 14.3 127 23.4 21.1 111 WHISKEY PARK 8950 41.8 30.5 137 35.0 31.5 111 ----- ----- Basin wide percent of average 132 122 UPPER GREEN RIVER BIG SANDY OPENING 9100 19.2 15.1 127 17.9 17.7 101 BLIND BULL SUM 8650 46.1 29.4 157 34.0 25.9 131 EAST RIM DIVIDE 7930 17.7 15.0 118 17.8 16.5 108 ELKHART PARK G.S. 9400 19.3 14.8 130 19.4 17.4 111 GROS VENTRE SUMMIT 8775 22.6 15.6 145 21.9 17.3 127 KENDALL R.S. 7740 22.7 12.6 180 24.2 16.9 143 LOOMIS PARK 8240 -M 16.6 * 28.1 20.5 137 NEW FORK LAKE 8340 14.9 10.4 143 13.9 15.7 89 SNIDER BASIN 8250 24.4 15.0 163 20.0 16.5 121 SPRING CREEK DIVIDE 9000 37.9 29.4 129 33.7 29.6 114 TRIPLE PEAK 8500 35.7 26.5 135 38.9 33.6 116 ----- ----- Basin wide percent of average 142 119 LOWER GREEN RIVER HAMS FORK 7840 14.3 5.7 251 15.5 14.6 106 HEWINTA 9500 11.4 8.3 137 15.2 14.9 102 HICKERSON PARK 9150 11.3 5.9 192 11.3 11.1 102 HOLE-IN-ROCK 9150 11.3 5.5 205 11.7 11.1 105 INDIAN CREEK 9425 42.9 30.1 143 32.8 28.1 117 KELLEY R.S. 8180 24.5 17.1 143 27.2 20.4 133 STEEL CREEK PARK 10100 17.6 18.1 97 17.3 14.7 118 ----- ----- Basin wide percent of average 147 114 UPPER BEAR RIVER BUG LAKE 7950 35.0 19.2 182 30.5 21.3 143 HAYDEN FORK 9400 16.7 10.0 167 26.2 21.3 123 KELLEY R.S. 8180 24.5 17.1 143 27.2 20.4 133 LILY LAKE 9050 17.4 12.1 144 20.5 16.6 123 MONTE CRISTO 8960 39.6 28.7 138 34.4 28.3 122 SALT RIVER SUMMIT 7600 21.8 13.2 165 24.7 18.4 134 TRIAL LAKE 9960 36.2 25.6 141 35.3 26.4 134 ----- ----- Basin wide percent of average 152 130 ----------------------------------------------------------------------------- -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.