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 SATURDAY: FEBRUARY 20 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 -M 14.7 * -M 18.9 * COTTONWOOD CREEK 7600 -M 17.2 * -M 20.7 * GRANITE CREEK 6770 18.1 14.4 126 19.9 19.8 101 GRASSY LAKE 7265 34.3 29.7 115 34.0 30.5 111 GROS VENTRE SUMMIT 8775 13.2 12.1 109 13.0 13.4 97 LEWIS LAKE DIVIDE 7860 33.3 27.5 121 28.6 31.0 92 PHILLIPS BENCH 8200 26.9 22.8 118 23.7 24.6 96 SALT RIVER SUMMIT 7600 13.5 11.1 122 15.6 14.2 110 SNAKE RIVER STATION 6920 18.3 15.1 121 21.7 21.5 101 SPRING CREEK DIVIDE 9000 23.9 21.6 111 23.7 22.6 105 THUMB DIVIDE 7980 -M 13.4 * -M 17.7 * TOGWOTEE PASS 9580 -M 19.6 * 24.2 23.2 104 TWO OCEAN PLATEAU 9360 30.8 21.0 147 23.3 26.0 90 WILLOW CREEK 8450 27.4 24.5 112 30.7 26.7 115 ----- ----- Basin wide percent of average 120 102 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 21.8 18.7 117 19.7 14.1 140 BLACK BEAR 7950 41.8 29.5 142 -M 31.4 * CANYON 7940 15.7 9.9 159 16.2 11.4 142 FISHER CREEK 9100 33.6 28.4 118 -M 28.7 * MADISON PLATEAU 7750 -M 19.3 * 24.2 20.4 119 NORTHEAST ENTRANCE 7350 10.5 7.6 138 12.2 9.6 127 PARKER PEAK 9400 19.8 16.8 118 -M 12.3 * SYLVAN LAKE 8420 22.2 17.4 128 24.2 15.3 158 THUMB DIVIDE 7980 -M 13.4 * -M 17.7 * TWO OCEAN PLATEAU 9360 30.8 21.0 147 23.3 26.0 90 WHISKEY CREEK 6800 17.7 13.4 132 19.4 16.8 115 WHITE MILL 8700 22.5 20.0 112 20.3 22.4 91 WOLVERINE 7650 12.5 9.5 132 11.4 10.3 111 ----- ----- Basin wide percent of average 130 117 WIND RIVER BURROUGHS CREEK 8750 14.8 12.3 120 16.1 13.1 123 COLD SPRINGS 9630 8.2 6.6 124 10.0 7.9 127 DEER PARK 9700 14.7 -M * 19.3 -M * HOBBS PARK 10100 14.6 11.4 128 13.8 10.6 130 LITTLE WARM 9620 11.6 8.6 135 12.9 10.2 126 SOUTH PASS 9040 15.7 13.2 119 16.8 12.8 131 ST. LAWRENCE ALT 8620 6.3 5.8 109 9.2 7.5 123 TOGWOTEE PASS 9580 -M 19.6 * 24.2 23.2 104 TOWNSEND CREEK 8700 8.3 7.4 112 11.0 9.2 120 ----- ----- Basin wide percent of average 122 121 BIGHORN BASIN BALD MTN. 9375 16.2 16.0 101 15.0 13.3 113 BEAR TRAP MEADOW 7900 5.6 5.6 100 -M 6.0 * BLACKWATER 9780 25.4 16.7 152 21.6 14.2 152 BONE SPRINGS DIV 9350 12.9 12.5 103 13.0 11.0 118 EVENING STAR 9200 28.4 21.2 134 27.7 17.8 156 GRAVE SPRINGS 8550 6.0 7.1 85 8.8 7.1 124 KIRWIN 9550 10.8 7.6 142 12.5 8.0 156 MARQUETTE 8760 6.7 6.1 110 7.4 6.7 110 MIDDLE POWDER 7760 6.6 9.1 73 12.1 8.8 138 OWL CREEK 8975 5.3 3.4 156 5.8 4.5 129 POWDER RIVER PASS 9480 10.5 8.2 128 12.3 8.9 138 SHELL CREEK 9580 14.1 11.9 118 13.1 10.1 130 SYLVAN LAKE 8420 22.2 17.4 128 24.2 15.3 158 SYLVAN ROAD 8120 -M 10.4 * -M 12.8 * TIMBER CREEK 7950 4.6 4.5 102 6.3 4.8 131 YOUNTS PEAK 8350 18.5 14.0 132 16.3 13.1 124 ----- ----- Basin wide percent of average 120 137 SHOSHONE RIVER BLACKWATER 9780 25.4 16.7 152 21.6 14.2 152 EVENING STAR 9200 28.4 21.2 134 27.7 17.8 156 KIRWIN 9550 10.8 7.6 142 12.5 8.0 156 MARQUETTE 8760 6.7 6.1 110 7.4 6.7 110 SYLVAN LAKE 8420 22.2 17.4 128 24.2 15.3 158 SYLVAN ROAD 8120 -M 10.4 * -M 12.8 * YOUNTS PEAK 8350 18.5 14.0 132 16.3 13.1 124 ----- ----- Basin wide percent of average 135 146 POWDER-TONGUE BEAR TRAP MEADOW 7900 5.6 5.6 100 -M 6.0 * BIG GOOSE 7990 4.9 -M * 7.7 -M * BONE SPRINGS DIV 9350 12.9 12.5 103 13.0 11.0 118 BURGESS JUNCTION 7880 6.6 9.0 73 8.5 8.1 105 CLOUD PEAK RESERVOIR 9860 11.8 10.1 117 10.1 9.6 105 DOME LAKE 8880 6.8 10.5 65 9.4 9.9 95 GRAVE SPRINGS 8550 6.0 7.1 85 8.8 7.1 124 HANSEN SAWMILL 8760 4.4 5.4 81 6.8 5.7 119 MIDDLE POWDER 7760 6.6 9.1 73 12.1 8.8 138 POWDER RIVER PASS 9480 10.5 8.2 128 12.3 8.9 138 SUCKER CREEK 8880 8.1 9.1 89 10.3 9.9 104 TIE CREEK 6870 2.7 -M * 6.6 7.8 85 ----- ----- Basin wide percent of average 92 113 BELLE FOURCHE BLIND PARK 6890 6.0 8.5 71 13.1 7.1 185 NORTH RAPID CREEK 6130 4.5 -M * 11.1 -M * WARREN PEAK 6520 7.1 8.5 84 11.5 5.9 195 ----- ----- Basin wide percent of average 77 189 UPPER N. PLATTE RIVER COLUMBINE 9400 16.8 19.3 87 17.8 19.2 93 DIVIDE PEAK 8800 15.9 15.7 101 20.8 17.9 116 ELK RIVER 8700 15.1 15.5 97 18.7 14.5 129 JOE WRIGHT 10120 16.4 16.4 100 22.2 19.0 117 NORTH FRENCH CREEK 10100 23.7 19.0 125 24.4 17.7 138 OLD BATTLE 10000 23.2 24.4 95 27.8 22.9 121 SOUTH BRUSH CREEK 8400 -M 8.6 * 16.2 12.2 133 TOWER 10500 35.5 35.0 101 32.8 28.1 117 WEBBER SPRINGS 9200 15.6 20.8 75 21.4 19.4 110 WILLOW CREEK PASS 9540 9.9 8.6 115 10.1 9.2 110 ----- ----- Basin wide percent of average 99 118 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 17.5 18.6 94 18.6 14.4 129 CASPER MTN. 7900 9.1 11.3 81 14.0 10.1 139 DEADMAN HILL 10220 -M 12.8 * 14.9 12.1 123 DEER PARK 9700 14.7 -M * 19.3 -M * LAPRELE CREEK 8320 -M 7.8 * 12.2 8.6 142 RENO HILL 8400 10.9 10.0 109 15.4 13.6 113 ROACH 9700 14.2 13.0 109 16.7 16.3 102 SAND LAKE 10080 27.1 25.1 108 23.6 15.4 153 SOUTH PASS 9040 15.7 13.2 119 16.8 12.8 131 WINDY PEAK 7840 5.1 5.6 91 11.0 6.7 164 ----- ----- Basin wide percent of average 103 130 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 11.8 9.0 131 15.2 12.1 126 DIVIDE PEAK 8800 15.9 15.7 101 20.8 17.9 116 OLD BATTLE 10000 23.2 24.4 95 27.8 22.9 121 SANDSTONE RS 8150 11.3 11.3 100 17.7 14.7 120 WHISKEY PARK 8950 21.6 21.9 99 22.9 21.7 106 ----- ----- Basin wide percent of average 102 117 UPPER GREEN RIVER BIG SANDY OPENING 9100 13.6 11.2 121 12.8 13.7 93 BLIND BULL SUM 8650 24.7 22.7 109 19.6 19.7 99 EAST RIM DIVIDE 7930 12.0 11.1 108 12.3 12.8 96 ELKHART PARK G.S. 9400 11.7 10.8 108 12.3 13.5 91 GROS VENTRE SUMMIT 8775 13.2 12.1 109 13.0 13.4 97 KENDALL R.S. 7740 13.5 11.7 115 13.0 13.1 99 LOOMIS PARK 8240 -M 13.9 * 17.4 15.8 110 NEW FORK LAKE 8340 10.8 9.3 116 10.6 12.2 87 SNIDER BASIN 8250 14.1 11.8 119 14.0 12.8 109 SPRING CREEK DIVIDE 9000 23.9 21.6 111 23.7 22.6 105 TRIPLE PEAK 8500 22.4 20.4 110 23.9 26.2 91 ----- ----- Basin wide percent of average 112 98 LOWER GREEN RIVER HAMS FORK 7840 11.1 9.8 113 9.6 11.2 86 HEWINTA 9500 8.7 7.7 113 11.3 9.6 118 HICKERSON PARK 9150 5.6 4.6 122 8.1 6.8 119 HOLE-IN-ROCK 9150 5.6 4.1 137 8.4 6.8 124 INDIAN CREEK 9425 24.2 21.4 113 20.1 21.2 95 KELLEY R.S. 8180 14.3 13.2 108 15.9 15.8 101 STEEL CREEK PARK 10100 11.2 11.5 97 13.2 9.8 135 ----- ----- Basin wide percent of average 112 107 UPPER BEAR RIVER BUG LAKE 7950 17.6 15.6 113 16.2 14.9 109 HAYDEN FORK 9400 12.1 12.6 96 15.4 14.1 109 KELLEY R.S. 8180 14.3 13.2 108 15.9 15.8 101 LILY LAKE 9050 10.9 9.9 110 14.7 11.0 134 MONTE CRISTO 8960 21.7 21.2 102 21.8 19.4 112 SALT RIVER SUMMIT 7600 13.5 11.1 122 15.6 14.2 110 TRIAL LAKE 9960 16.7 19.3 87 17.5 18.3 96 ----- ----- Basin wide percent of average 104 109 ----------------------------------------------------------------------------- -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.