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: FEBRUARY 17 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 19.1 14.3 134 -M 18.5 * COTTONWOOD CREEK 7600 18.2 16.7 109 21.0 20.2 104 GRANITE CREEK 6770 16.8 14.1 119 18.6 19.4 96 GRASSY LAKE 7265 32.5 29.8 109 32.0 29.9 107 GROS VENTRE SUMMIT 8775 12.6 11.9 106 12.4 13.1 95 LEWIS LAKE DIVIDE 7860 31.5 26.8 118 28.5 30.4 94 PHILLIPS BENCH 8200 25.1 22.3 113 23.4 24.0 98 SALT RIVER SUMMIT 7600 12.5 10.8 116 14.7 13.9 106 SNAKE RIVER STATION 6920 -M 14.7 * -M 21.0 * SPRING CREEK DIVIDE 9000 22.2 21.1 105 22.2 22.1 100 THUMB DIVIDE 7980 -M 13.1 * -M 17.3 * TOGWOTEE PASS 9580 -M 19.2 * 23.2 22.7 102 TWO OCEAN PLATEAU 9360 29.5 20.7 143 23.3 25.5 91 WILLOW CREEK 8450 25.5 24.1 106 29.4 26.1 113 ----- ----- Basin wide percent of average 115 101 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 21.3 18.3 116 19.0 13.8 138 BLACK BEAR 7950 40.5 28.8 141 -M 30.6 * CANYON 7940 15.1 9.7 156 15.8 11.2 141 FISHER CREEK 9100 32.4 27.7 117 -M 28.1 * MADISON PLATEAU 7750 -M 18.8 * 24.1 19.9 121 NORTHEAST ENTRANCE 7350 9.9 7.4 134 11.6 9.4 123 PARKER PEAK 9400 19.0 16.5 115 -M 12.0 * SYLVAN LAKE 8420 21.8 17.0 128 23.7 15.0 158 THUMB DIVIDE 7980 -M 13.1 * -M 17.3 * TWO OCEAN PLATEAU 9360 29.5 20.7 143 23.3 25.5 91 WHISKEY CREEK 6800 16.9 13.0 130 19.4 16.5 118 WHITE MILL 8700 21.4 19.6 109 19.2 21.9 88 WOLVERINE 7650 12.1 9.2 132 11.0 10.1 109 ----- ----- Basin wide percent of average 128 117 WIND RIVER BURROUGHS CREEK 8750 14.2 12.1 117 15.4 12.8 120 COLD SPRINGS 9630 8.1 6.5 125 9.9 7.8 127 DEER PARK 9700 14.3 -M * 18.7 -M * HOBBS PARK 10100 14.4 11.2 129 13.4 10.3 130 LITTLE WARM 9620 11.4 8.3 137 12.5 10.0 125 SOUTH PASS 9040 15.2 12.9 118 16.4 12.5 131 ST. LAWRENCE ALT 8620 6.3 5.6 113 9.2 7.3 126 TOGWOTEE PASS 9580 -M 19.2 * 23.2 22.7 102 TOWNSEND CREEK 8700 8.4 7.2 117 11.0 8.9 124 ----- ----- Basin wide percent of average 122 120 BIGHORN BASIN BALD MTN. 9375 15.3 15.7 97 14.2 13.1 108 BEAR TRAP MEADOW 7900 5.5 5.5 100 7.8 5.9 132 BLACKWATER 9780 24.5 16.3 150 20.7 13.9 149 BONE SPRINGS DIV 9350 12.4 12.2 102 12.6 10.7 118 EVENING STAR 9200 27.7 20.7 134 27.7 17.4 159 GRAVE SPRINGS 8550 5.6 6.9 81 8.6 7.0 123 KIRWIN 9550 10.5 7.4 142 12.2 7.8 156 MARQUETTE 8760 6.6 6.0 110 7.4 6.5 114 MIDDLE POWDER 7760 6.3 8.8 72 12.1 8.6 141 OWL CREEK 8975 5.3 3.3 161 5.9 4.4 134 POWDER RIVER PASS 9480 9.9 8.0 124 11.8 8.7 136 SHELL CREEK 9580 13.5 11.7 115 12.6 9.9 127 SYLVAN LAKE 8420 21.8 17.0 128 23.7 15.0 158 SYLVAN ROAD 8120 14.3 10.1 142 16.3 12.5 130 TIMBER CREEK 7950 4.5 4.4 102 6.3 4.7 134 YOUNTS PEAK 8350 17.6 13.7 128 15.5 12.8 121 ----- ----- Basin wide percent of average 120 136 SHOSHONE RIVER BLACKWATER 9780 24.5 16.3 150 20.7 13.9 149 EVENING STAR 9200 27.7 20.7 134 27.7 17.4 159 KIRWIN 9550 10.5 7.4 142 12.2 7.8 156 MARQUETTE 8760 6.6 6.0 110 7.4 6.5 114 SYLVAN LAKE 8420 21.8 17.0 128 23.7 15.0 158 SYLVAN ROAD 8120 14.3 10.1 142 16.3 12.5 130 YOUNTS PEAK 8350 17.6 13.7 128 15.5 12.8 121 ----- ----- Basin wide percent of average 135 144 POWDER-TONGUE BEAR TRAP MEADOW 7900 5.5 5.5 100 7.8 5.9 132 BIG GOOSE 7990 4.7 -M * 7.7 -M * BONE SPRINGS DIV 9350 12.4 12.2 102 12.6 10.7 118 BURGESS JUNCTION 7880 6.3 8.8 72 8.2 8.0 102 CLOUD PEAK RESERVOIR 9860 11.4 9.8 116 9.8 9.4 104 DOME LAKE 8880 6.5 10.3 63 8.9 9.7 92 GRAVE SPRINGS 8550 5.6 6.9 81 8.6 7.0 123 HANSEN SAWMILL 8760 4.3 5.3 81 6.8 5.6 121 MIDDLE POWDER 7760 6.3 8.8 72 12.1 8.6 141 POWDER RIVER PASS 9480 9.9 8.0 124 11.8 8.7 136 SUCKER CREEK 8880 7.8 8.8 89 10.1 9.7 104 TIE CREEK 6870 2.6 -M * 6.3 7.6 83 ----- ----- Basin wide percent of average 90 113 BELLE FOURCHE BLIND PARK 6890 5.6 8.3 67 12.6 7.0 180 NORTH RAPID CREEK 6130 4.3 -M * 11.0 -M * WARREN PEAK 6520 6.6 8.3 80 11.1 5.8 191 ----- ----- Basin wide percent of average 73 185 UPPER N. PLATTE RIVER COLUMBINE 9400 15.5 18.8 82 16.7 18.7 89 DIVIDE PEAK 8800 15.3 15.3 100 20.8 17.6 118 ELK RIVER 8700 -M 15.1 * 18.0 14.2 127 JOE WRIGHT 10120 15.8 16.0 99 21.3 18.6 115 NORTH FRENCH CREEK 10100 22.4 18.5 121 23.3 17.3 135 OLD BATTLE 10000 21.5 23.8 90 27.7 22.3 124 SOUTH BRUSH CREEK 8400 5.2 8.4 62 16.1 12.0 134 TOWER 10500 32.9 34.3 96 30.9 27.5 112 WEBBER SPRINGS 9200 14.5 20.3 71 20.3 18.9 107 WILLOW CREEK PASS 9540 9.5 8.4 113 10.1 9.0 112 ----- ----- Basin wide percent of average 93 117 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 15.7 18.2 86 17.2 14.0 123 CASPER MTN. 7900 8.3 11.0 75 13.3 9.9 134 DEADMAN HILL 10220 12.8 12.6 102 14.2 11.8 120 DEER PARK 9700 14.3 -M * 18.7 -M * LAPRELE CREEK 8320 -M 7.6 * 10.7 8.5 126 RENO HILL 8400 9.7 9.7 100 14.2 13.2 108 ROACH 9700 13.6 12.7 107 16.0 16.0 100 SAND LAKE 10080 25.3 24.5 103 22.3 15.0 149 SOUTH PASS 9040 15.2 12.9 118 16.4 12.5 131 WINDY PEAK 7840 4.0 5.4 74 10.0 6.6 152 ----- ----- Basin wide percent of average 98 125 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 10.9 8.7 125 14.8 11.9 124 DIVIDE PEAK 8800 15.3 15.3 100 20.8 17.6 118 OLD BATTLE 10000 21.5 23.8 90 27.7 22.3 124 SANDSTONE RS 8150 10.2 11.0 93 16.8 14.5 116 WHISKEY PARK 8950 19.6 21.4 92 22.9 21.4 107 ----- ----- Basin wide percent of average 97 117 UPPER GREEN RIVER BIG SANDY OPENING 9100 13.2 10.9 121 12.3 13.4 92 BLIND BULL SUM 8650 23.2 22.2 105 18.4 19.2 96 EAST RIM DIVIDE 7930 11.2 10.8 104 11.6 12.5 93 ELKHART PARK G.S. 9400 11.3 10.5 108 11.8 13.2 89 GROS VENTRE SUMMIT 8775 12.6 11.9 106 12.4 13.1 95 KENDALL R.S. 7740 12.9 11.4 113 12.8 12.8 100 LOOMIS PARK 8240 -M 13.6 * 16.5 15.5 106 NEW FORK LAKE 8340 10.3 9.0 114 10.3 11.9 87 SNIDER BASIN 8250 12.9 11.5 112 12.9 12.5 103 SPRING CREEK DIVIDE 9000 22.2 21.1 105 22.2 22.1 100 TRIPLE PEAK 8500 20.7 20.0 104 22.1 25.7 86 ----- ----- Basin wide percent of average 108 95 LOWER GREEN RIVER HAMS FORK 7840 10.1 9.6 105 8.8 11.0 80 HEWINTA 9500 7.9 7.5 105 10.5 9.4 112 HICKERSON PARK 9150 5.1 4.4 116 7.6 6.7 113 HOLE-IN-ROCK 9150 5.1 4.0 128 8.0 6.7 119 INDIAN CREEK 9425 22.7 20.9 109 18.8 20.7 91 KELLEY R.S. 8180 13.1 12.8 102 14.8 15.5 95 STEEL CREEK PARK 10100 10.5 11.1 95 12.4 9.6 129 ----- ----- Basin wide percent of average 106 102 UPPER BEAR RIVER BUG LAKE 7950 15.8 15.1 105 14.9 14.6 102 HAYDEN FORK 9400 10.7 12.2 88 15.0 13.8 109 KELLEY R.S. 8180 13.1 12.8 102 14.8 15.5 95 LILY LAKE 9050 9.9 9.7 102 13.7 10.8 127 MONTE CRISTO 8960 19.6 20.4 96 20.2 19.0 106 SALT RIVER SUMMIT 7600 12.5 10.8 116 14.7 13.9 106 TRIAL LAKE 9960 15.2 18.6 82 16.2 17.8 91 ----- ----- Basin wide percent of average 97 104 ----------------------------------------------------------------------------- -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.