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 SUNDAY: FEBRUARY 28 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 22.9 15.6 147 24.2 20.0 121 COTTONWOOD CREEK 7600 21.6 18.4 117 24.0 22.1 109 GRANITE CREEK 6770 19.4 15.3 127 20.9 21.0 100 GRASSY LAKE 7265 37.8 29.6 128 36.7 32.3 114 GROS VENTRE SUMMIT 8775 13.9 12.8 109 13.5 14.1 96 LEWIS LAKE DIVIDE 7860 36.9 29.3 126 29.5 32.8 90 PHILLIPS BENCH 8200 29.4 24.0 123 25.0 25.9 97 SALT RIVER SUMMIT 7600 14.2 12.0 118 16.3 15.0 109 SNAKE RIVER STATION 6920 20.1 16.1 125 23.3 22.7 103 SPRING CREEK DIVIDE 9000 25.5 23.1 110 24.8 23.9 104 THUMB DIVIDE 7980 21.1 14.2 149 19.7 18.7 105 TOGWOTEE PASS 9580 -M 20.7 * 25.7 24.5 105 TWO OCEAN PLATEAU 9360 32.7 22.1 148 23.4 27.5 85 WILLOW CREEK 8450 29.2 25.7 114 33.2 28.4 117 ----- ----- Basin wide percent of average 126 103 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 23.2 19.8 117 20.9 15.0 139 BLACK BEAR 7950 45.8 31.5 145 -M 33.4 * CANYON 7940 16.4 10.6 155 17.0 12.0 142 FISHER CREEK 9100 36.0 30.1 120 -M 30.5 * MADISON PLATEAU 7750 -M 20.5 * 24.6 21.6 114 NORTHEAST ENTRANCE 7350 11.0 8.0 138 12.8 10.1 127 PARKER PEAK 9400 20.7 17.9 116 -M 13.0 * SYLVAN LAKE 8420 23.2 18.4 126 25.0 16.2 154 THUMB DIVIDE 7980 21.1 14.2 149 19.7 18.7 105 TWO OCEAN PLATEAU 9360 32.7 22.1 148 23.4 27.5 85 WHISKEY CREEK 6800 18.9 14.4 131 19.5 17.9 109 WHITE MILL 8700 24.3 21.1 115 21.6 23.6 92 WOLVERINE 7650 12.9 10.0 129 11.6 10.9 106 ----- ----- Basin wide percent of average 131 113 WIND RIVER BURROUGHS CREEK 8750 15.5 13.0 119 16.9 13.9 122 COLD SPRINGS 9630 8.6 7.0 123 10.6 8.3 128 DEER PARK 9700 14.7 -M * 19.7 -M * HOBBS PARK 10100 15.4 12.0 128 14.0 11.1 126 LITTLE WARM 9620 12.3 9.1 135 13.6 10.7 127 SOUTH PASS 9040 15.9 13.9 114 17.0 13.7 124 ST. LAWRENCE ALT 8620 6.3 6.2 102 9.3 7.9 118 TOGWOTEE PASS 9580 -M 20.7 * 25.7 24.5 105 TOWNSEND CREEK 8700 8.6 7.9 109 11.4 9.7 118 ----- ----- Basin wide percent of average 120 119 BIGHORN BASIN BALD MTN. 9375 17.6 16.9 104 16.3 14.0 116 BEAR TRAP MEADOW 7900 5.9 5.9 100 8.0 6.3 127 BLACKWATER 9780 27.2 17.9 152 22.6 15.1 150 BONE SPRINGS DIV 9350 13.7 13.3 103 13.9 11.6 120 EVENING STAR 9200 30.2 22.4 135 28.4 18.9 150 GRAVE SPRINGS 8550 6.6 7.5 88 9.4 7.4 127 KIRWIN 9550 11.1 8.0 139 13.0 8.5 153 MARQUETTE 8760 7.0 6.5 108 7.8 7.1 110 MIDDLE POWDER 7760 7.4 9.6 77 13.2 9.2 143 OWL CREEK 8975 5.5 3.7 149 6.1 4.9 124 POWDER RIVER PASS 9480 11.0 8.7 126 13.1 9.3 141 SHELL CREEK 9580 14.6 12.5 117 13.5 10.5 129 SYLVAN LAKE 8420 23.2 18.4 126 25.0 16.2 154 SYLVAN ROAD 8120 15.7 11.1 141 17.7 13.5 131 TIMBER CREEK 7950 4.6 4.9 94 6.3 5.1 124 YOUNTS PEAK 8350 19.3 14.7 131 17.1 13.8 124 ----- ----- Basin wide percent of average 121 135 SHOSHONE RIVER BLACKWATER 9780 27.2 17.9 152 22.6 15.1 150 EVENING STAR 9200 30.2 22.4 135 28.4 18.9 150 KIRWIN 9550 11.1 8.0 139 13.0 8.5 153 MARQUETTE 8760 7.0 6.5 108 7.8 7.1 110 SYLVAN LAKE 8420 23.2 18.4 126 25.0 16.2 154 SYLVAN ROAD 8120 15.7 11.1 141 17.7 13.5 131 YOUNTS PEAK 8350 19.3 14.7 131 17.1 13.8 124 ----- ----- Basin wide percent of average 135 141 POWDER-TONGUE BEAR TRAP MEADOW 7900 5.9 5.9 100 8.0 6.3 127 BIG GOOSE 7990 4.9 -M * 7.9 -M * BONE SPRINGS DIV 9350 13.7 13.3 103 13.9 11.6 120 BURGESS JUNCTION 7880 7.0 9.6 73 8.8 8.5 104 CLOUD PEAK RESERVOIR 9860 12.4 11.0 113 10.8 10.2 106 DOME LAKE 8880 6.9 11.2 62 9.5 10.3 92 GRAVE SPRINGS 8550 6.6 7.5 88 9.4 7.4 127 HANSEN SAWMILL 8760 4.6 5.7 81 6.9 6.0 115 MIDDLE POWDER 7760 7.4 9.6 77 13.2 9.2 143 POWDER RIVER PASS 9480 11.0 8.7 126 13.1 9.3 141 SUCKER CREEK 8880 8.5 9.6 89 10.8 10.4 104 TIE CREEK 6870 2.9 -M * 6.8 8.2 83 ----- ----- Basin wide percent of average 91 114 BELLE FOURCHE BLIND PARK 6890 7.0 9.0 78 14.0 7.5 187 NORTH RAPID CREEK 6130 5.0 -M * 11.5 -M * WARREN PEAK 6520 9.2 9.0 102 12.8 6.2 206 ----- ----- Basin wide percent of average 90 196 UPPER N. PLATTE RIVER COLUMBINE 9400 18.3 20.8 88 18.9 20.4 93 DIVIDE PEAK 8800 16.4 16.7 98 21.8 18.6 117 ELK RIVER 8700 16.2 16.6 98 19.5 15.4 127 JOE WRIGHT 10120 17.4 17.3 101 23.1 20.1 115 NORTH FRENCH CREEK 10100 25.3 20.2 125 25.7 18.8 137 OLD BATTLE 10000 24.2 26.0 93 30.9 24.3 127 SOUTH BRUSH CREEK 8400 11.3 9.3 122 16.9 12.8 132 TOWER 10500 37.9 37.0 102 34.4 29.8 115 WEBBER SPRINGS 9200 16.5 22.1 75 22.4 20.6 109 WILLOW CREEK PASS 9540 10.0 9.1 110 10.3 9.8 105 ----- ----- Basin wide percent of average 99 117 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 18.3 19.8 92 19.4 15.4 126 CASPER MTN. 7900 9.4 12.2 77 14.3 10.7 134 DEADMAN HILL 10220 14.7 13.4 110 15.0 12.9 116 DEER PARK 9700 14.7 -M * 19.7 -M * LAPRELE CREEK 8320 -M 8.3 * 12.6 9.0 140 RENO HILL 8400 11.3 10.7 106 16.0 14.5 110 ROACH 9700 14.4 13.9 104 16.9 17.2 98 SAND LAKE 10080 28.9 26.6 109 24.8 16.4 151 SOUTH PASS 9040 15.9 13.9 114 17.0 13.7 124 WINDY PEAK 7840 5.3 6.1 87 11.2 7.1 158 ----- ----- Basin wide percent of average 101 126 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 12.1 9.8 123 15.7 12.5 126 DIVIDE PEAK 8800 16.4 16.7 98 21.8 18.6 117 OLD BATTLE 10000 24.2 26.0 93 30.9 24.3 127 SANDSTONE RS 8150 11.6 12.1 96 18.2 15.3 119 WHISKEY PARK 8950 23.2 23.4 99 24.0 22.4 107 ----- ----- Basin wide percent of average 99 119 UPPER GREEN RIVER BIG SANDY OPENING 9100 14.1 12.0 118 13.1 14.4 91 BLIND BULL SUM 8650 26.0 24.1 108 20.3 20.9 97 EAST RIM DIVIDE 7930 12.5 11.9 105 12.8 13.5 95 ELKHART PARK G.S. 9400 12.3 11.3 109 12.7 14.2 89 GROS VENTRE SUMMIT 8775 13.9 12.8 109 13.5 14.1 96 KENDALL R.S. 7740 14.4 12.4 116 14.5 13.8 105 LOOMIS PARK 8240 -M 14.8 * 18.4 16.7 110 NEW FORK LAKE 8340 11.4 9.8 116 11.1 12.8 87 SNIDER BASIN 8250 15.0 12.7 118 14.8 13.5 110 SPRING CREEK DIVIDE 9000 25.5 23.1 110 24.8 23.9 104 TRIPLE PEAK 8500 24.6 21.6 114 25.3 27.7 91 ----- ----- Basin wide percent of average 112 98 LOWER GREEN RIVER HAMS FORK 7840 12.8 10.4 123 9.8 11.8 83 HEWINTA 9500 9.7 8.4 115 12.2 10.1 121 HICKERSON PARK 9150 5.7 5.0 114 8.2 7.2 114 HOLE-IN-ROCK 9150 5.9 4.5 131 8.6 7.2 119 INDIAN CREEK 9425 25.5 22.7 112 21.0 22.4 94 KELLEY R.S. 8180 14.9 14.1 106 16.5 16.7 99 STEEL CREEK PARK 10100 12.4 12.5 99 14.2 10.2 139 ----- ----- Basin wide percent of average 112 106 UPPER BEAR RIVER BUG LAKE 7950 19.1 16.8 114 17.3 15.8 109 HAYDEN FORK 9400 13.4 13.6 99 17.2 15.1 114 KELLEY R.S. 8180 14.9 14.1 106 16.5 16.7 99 LILY LAKE 9050 11.6 10.5 110 15.5 11.6 134 MONTE CRISTO 8960 23.2 23.2 100 23.0 20.6 112 SALT RIVER SUMMIT 7600 14.2 12.0 118 16.3 15.0 109 TRIAL LAKE 9960 17.8 21.0 85 18.6 19.5 95 ----- ----- Basin wide percent of average 103 109 ----------------------------------------------------------------------------- -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.