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 THURSDAY: APRIL 29 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 17.9 11.5 158 29.0 25.2 116 COTTONWOOD CREEK 7600 24.5 20.5 120 31.7 28.2 113 GRANITE CREEK 6770 18.4 13.6 136 25.4 26.7 96 GRASSY LAKE 7265 41.8 34.4 122 44.8 41.8 108 GROS VENTRE SUMMIT 8775 16.9 14.2 120 17.5 18.0 98 LEWIS LAKE DIVIDE 7860 40.2 34.8 116 42.8 42.4 101 PHILLIPS BENCH 8200 36.3 29.7 123 34.5 33.5 103 SALT RIVER SUMMIT 7600 15.5 11.2 139 20.9 19.2 109 SNAKE RIVER STATION 6920 16.9 16.7 102 28.0 29.4 96 SPRING CREEK DIVIDE 9000 34.9 29.7 118 32.5 30.7 106 THUMB DIVIDE 7980 -M 15.5 * -M 23.5 * TOGWOTEE PASS 9580 -M 28.2 * 32.0 31.9 101 TWO OCEAN PLATEAU 9360 40.3 27.5 147 34.7 34.5 101 WILLOW CREEK 8450 34.0 31.9 107 42.4 36.0 118 ----- ----- Basin wide percent of average 123 105 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 27.2 26.0 105 26.7 21.0 127 BLACK BEAR 7950 -M 39.9 * 49.3 46.3 107 CANYON 7940 16.5 11.4 147 20.9 16.2 129 FISHER CREEK 9100 39.7 38.8 103 40.8 41.9 98 MADISON PLATEAU 7750 -M 24.2 * 34.7 29.7 117 NORTHEAST ENTRANCE 7350 7.5 6.3 120 16.0 13.9 116 PARKER PEAK 9400 27.4 23.7 116 -M 18.2 * SYLVAN LAKE 8420 26.9 23.9 113 31.0 22.2 140 THUMB DIVIDE 7980 -M 15.5 * -M 23.5 * TWO OCEAN PLATEAU 9360 40.3 27.5 147 34.7 34.5 101 WHISKEY CREEK 6800 21.2 15.6 136 26.4 24.9 107 WHITE MILL 8700 30.4 26.4 116 27.9 32.4 87 WOLVERINE 7650 9.6 8.6 112 14.6 15.1 97 ----- ----- Basin wide percent of average 119 109 WIND RIVER BURROUGHS CREEK 8750 18.4 13.4 138 20.0 19.4 104 COLD SPRINGS 9630 15.5 7.1 217 19.0 13.0 147 DEER PARK 9700 25.2 -M * 30.7 -M * HOBBS PARK 10100 27.4 17.9 154 24.9 17.2 146 LITTLE WARM 9620 17.7 10.9 163 20.4 16.2 126 SOUTH PASS 9040 24.7 18.2 137 28.4 20.4 140 ST. LAWRENCE ALT 8620 13.6 5.8 239 -M 12.5 * TOGWOTEE PASS 9580 -M 28.2 * 32.0 31.9 101 TOWNSEND CREEK 8700 -M 9.7 * -M 15.5 * ----- ----- Basin wide percent of average 161 123 BIGHORN BASIN BALD MTN. 9375 22.4 23.9 94 21.5 20.7 105 BEAR TRAP MEADOW 7900 2.3 4.6 48 13.2 10.5 126 BLACKWATER 9780 34.8 25.7 136 28.2 20.5 138 BONE SPRINGS DIV 9350 20.9 18.4 114 21.2 18.0 118 EVENING STAR 9200 36.8 30.7 120 38.8 25.7 151 GRAVE SPRINGS 8550 11.2 11.5 98 15.6 12.4 127 KIRWIN 9550 15.9 11.7 136 18.2 13.2 138 MARQUETTE 8760 16.4 8.7 188 17.4 13.4 131 MIDDLE POWDER 7760 17.7 14.7 121 21.2 14.7 144 OWL CREEK 8975 9.0 3.7 248 10.1 8.0 127 POWDER RIVER PASS 9480 13.2 10.7 124 18.4 14.5 127 SHELL CREEK 9580 17.9 17.0 106 18.0 15.9 114 SYLVAN LAKE 8420 26.9 23.9 113 31.0 22.2 140 SYLVAN ROAD 8120 13.7 8.4 166 21.4 18.5 116 TIMBER CREEK 7950 9.7 6.1 160 13.6 10.0 138 YOUNTS PEAK 8350 21.5 18.4 117 20.9 19.2 109 ----- ----- Basin wide percent of average 122 128 SHOSHONE RIVER BLACKWATER 9780 34.8 25.7 136 28.2 20.5 138 EVENING STAR 9200 36.8 30.7 120 38.8 25.7 151 KIRWIN 9550 15.9 11.7 136 18.2 13.2 138 MARQUETTE 8760 16.4 8.7 188 17.4 13.4 131 SYLVAN LAKE 8420 26.9 23.9 113 31.0 22.2 140 SYLVAN ROAD 8120 13.7 8.4 166 21.4 18.5 116 YOUNTS PEAK 8350 21.5 18.4 117 20.9 19.2 109 ----- ----- Basin wide percent of average 131 133 POWDER-TONGUE BEAR TRAP MEADOW 7900 2.3 4.6 48 13.2 10.5 126 BIG GOOSE 7990 10.6 -M * 16.0 -M * BONE SPRINGS DIV 9350 20.9 18.4 114 21.2 18.0 118 BURGESS JUNCTION 7880 12.0 13.5 89 15.5 14.4 108 CLOUD PEAK RESERVOIR 9860 22.0 17.7 125 21.2 16.9 125 DOME LAKE 8880 -M 15.0 * 15.9 16.2 98 GRAVE SPRINGS 8550 11.2 11.5 98 15.6 12.4 127 HANSEN SAWMILL 8760 6.1 7.0 88 13.2 10.2 130 MIDDLE POWDER 7760 17.7 14.7 121 21.2 14.7 144 POWDER RIVER PASS 9480 13.2 10.7 124 18.4 14.5 127 SUCKER CREEK 8880 14.5 13.9 106 18.9 16.4 116 TIE CREEK 6870 -M -M * -M 13.7 * ----- ----- Basin wide percent of average 108 121 BELLE FOURCHE BLIND PARK 6890 -M 10.0 * 17.9 13.6 131 NORTH RAPID CREEK 6130 2.3 -M * 16.5 -M * WARREN PEAK 6520 8.5 10.0 85 13.2 10.2 130 ----- ----- Basin wide percent of average 85* 131 UPPER N. PLATTE RIVER COLUMBINE 9400 17.9 22.4 80 27.2 27.9 98 DIVIDE PEAK 8800 22.4 19.7 114 29.7 27.2 110 ELK RIVER 8700 16.0 16.9 95 26.7 22.0 121 JOE WRIGHT 10120 23.9 24.7 97 30.7 30.0 103 NORTH FRENCH CREEK 10100 38.3 29.4 131 36.5 27.9 132 OLD BATTLE 10000 36.8 38.0 97 43.0 35.4 122 SOUTH BRUSH CREEK 8400 10.2 11.0 93 22.9 20.4 113 TOWER 10500 54.5 50.9 108 45.9 42.8 108 WEBBER SPRINGS 9200 21.7 26.4 83 31.4 30.4 104 WILLOW CREEK PASS 9540 15.1 13.5 112 14.5 15.4 95 ----- ----- Basin wide percent of average 102 111 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 23.7 29.0 82 29.4 23.7 125 CASPER MTN. 7900 15.1 18.0 84 21.2 18.5 115 DEADMAN HILL 10220 20.4 19.0 107 21.9 20.9 105 DEER PARK 9700 25.2 -M * 30.7 -M * LAPRELE CREEK 8320 .0 6.8 0 19.4 14.6 133 RENO HILL 8400 17.4 13.7 128 24.4 22.2 110 ROACH 9700 19.0 18.2 105 24.9 25.5 98 SAND LAKE 10080 45.7 37.2 123 36.5 24.7 149 SOUTH PASS 9040 24.7 18.2 137 28.4 20.4 140 WINDY PEAK 7840 7.8 8.1 97 17.2 12.1 142 ----- ----- Basin wide percent of average 104 123 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 6.1 5.6 109 21.7 18.4 119 DIVIDE PEAK 8800 22.4 19.7 114 29.7 27.2 110 OLD BATTLE 10000 36.8 38.0 97 43.0 35.4 122 SANDSTONE RS 8150 10.0 10.5 95 24.4 22.9 108 WHISKEY PARK 8950 31.4 29.9 106 34.9 33.8 104 ----- ----- Basin wide percent of average 103 112 UPPER GREEN RIVER BIG SANDY OPENING 9100 17.0 14.1 121 17.9 18.4 97 BLIND BULL SUM 8650 31.2 23.9 132 24.7 26.9 93 EAST RIM DIVIDE 7930 14.5 15.0 97 16.0 17.2 93 ELKHART PARK G.S. 9400 15.5 14.2 110 17.2 18.2 96 GROS VENTRE SUMMIT 8775 16.9 14.2 120 17.5 18.0 98 KENDALL R.S. 7740 13.4 11.0 121 18.4 17.5 106 LOOMIS PARK 8240 -M 15.5 * 22.4 21.4 106 NEW FORK LAKE 8340 12.5 9.5 133 14.0 16.4 86 SNIDER BASIN 8250 20.4 13.5 152 20.4 17.2 120 SPRING CREEK DIVIDE 9000 34.9 29.7 118 32.5 30.7 106 TRIPLE PEAK 8500 30.7 25.4 121 34.0 34.8 98 ----- ----- Basin wide percent of average 122 100 LOWER GREEN RIVER HAMS FORK 7840 12.0 5.8 206 15.7 15.1 104 HEWINTA 9500 12.7 5.8 219 17.4 16.2 109 HICKERSON PARK 9150 6.0 3.4 177 13.5 12.2 110 HOLE-IN-ROCK 9150 9.5 2.8 336 14.0 12.2 114 INDIAN CREEK 9425 35.9 29.2 124 30.7 29.2 106 KELLEY R.S. 8180 17.7 15.5 115 22.4 21.2 106 STEEL CREEK PARK 10100 19.2 18.9 102 20.9 16.0 131 ----- ----- Basin wide percent of average 139 111 UPPER BEAR RIVER BUG LAKE 7950 24.9 16.5 151 25.7 22.5 114 HAYDEN FORK 9400 13.4 7.3 185 24.2 22.9 106 KELLEY R.S. 8180 17.7 15.5 115 22.4 21.2 106 LILY LAKE 9050 13.1 9.4 141 21.9 17.9 124 MONTE CRISTO 8960 35.2 26.7 132 33.3 30.0 111 SALT RIVER SUMMIT 7600 15.5 11.2 139 20.9 19.2 109 TRIAL LAKE 9960 23.9 24.4 99 26.7 28.2 96 ----- ----- Basin wide percent of average 130 109 ----------------------------------------------------------------------------- -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.