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: MARCH 12 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 24.6 16.5 149 25.2 21.1 119 COTTONWOOD CREEK 7600 23.9 20.9 114 25.8 23.5 110 GRANITE CREEK 6770 21.2 16.7 127 22.6 22.1 102 GRASSY LAKE 7265 41.1 32.3 127 38.4 34.5 111 GROS VENTRE SUMMIT 8775 15.1 14.1 107 14.7 14.9 99 LEWIS LAKE DIVIDE 7860 40.5 32.1 126 -M 35.0 * PHILLIPS BENCH 8200 31.6 26.4 120 25.3 27.7 91 SALT RIVER SUMMIT 7600 15.5 13.0 119 17.6 15.9 111 SNAKE RIVER STATION 6920 22.0 17.4 126 25.0 24.2 103 SPRING CREEK DIVIDE 9000 27.7 25.3 109 26.2 25.5 103 THUMB DIVIDE 7980 22.5 15.5 145 21.3 19.7 108 TOGWOTEE PASS 9580 -M 22.4 * 27.2 26.2 104 TWO OCEAN PLATEAU 9360 34.8 24.2 144 -M 29.0 * WILLOW CREEK 8450 31.9 27.8 115 34.8 30.1 116 ----- ----- Basin wide percent of average 125 107 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 25.1 21.4 117 22.4 16.2 138 BLACK BEAR 7950 48.6 34.5 141 -M 36.4 * CANYON 7940 17.5 11.6 151 18.3 12.9 142 FISHER CREEK 9100 39.0 32.5 120 -M 33.0 * MADISON PLATEAU 7750 -M 22.2 * -M 23.5 * NORTHEAST ENTRANCE 7350 12.1 8.7 139 13.8 10.8 128 PARKER PEAK 9400 22.2 19.6 113 -M 14.0 * SYLVAN LAKE 8420 24.4 20.0 122 26.2 17.4 151 THUMB DIVIDE 7980 22.5 15.5 145 21.3 19.7 108 TWO OCEAN PLATEAU 9360 34.8 24.2 144 -M 29.0 * WHISKEY CREEK 6800 20.1 15.7 128 -M 19.5 * WHITE MILL 8700 27.1 23.0 118 24.1 25.5 95 WOLVERINE 7650 13.7 10.8 127 12.2 11.6 105 ----- ----- Basin wide percent of average 129 121 WIND RIVER BURROUGHS CREEK 8750 16.3 14.0 116 17.6 15.0 117 COLD SPRINGS 9630 9.0 7.6 118 11.0 9.2 120 DEER PARK 9700 15.9 -M * 20.4 -M * HOBBS PARK 10100 16.2 13.2 123 14.6 12.3 119 LITTLE WARM 9620 13.0 10.1 129 14.4 11.7 123 SOUTH PASS 9040 16.7 14.9 112 17.7 15.0 118 ST. LAWRENCE ALT 8620 6.6 6.8 97 9.5 8.8 108 TOGWOTEE PASS 9580 -M 22.4 * 27.2 26.2 104 TOWNSEND CREEK 8700 9.0 8.8 102 11.8 10.8 109 ----- ----- Basin wide percent of average 115 114 BIGHORN BASIN BALD MTN. 9375 18.9 18.4 103 17.5 15.3 114 BEAR TRAP MEADOW 7900 7.1 6.4 111 9.0 7.0 129 BLACKWATER 9780 28.8 19.7 146 23.8 16.2 147 BONE SPRINGS DIV 9350 15.0 14.6 103 15.0 12.9 116 EVENING STAR 9200 32.1 24.3 132 -M 20.3 * GRAVE SPRINGS 8550 7.9 8.3 95 10.5 8.2 128 KIRWIN 9550 11.9 8.8 135 13.7 9.4 146 MARQUETTE 8760 7.7 7.1 108 8.4 8.0 105 MIDDLE POWDER 7760 10.3 10.6 97 14.7 10.1 146 OWL CREEK 8975 5.8 4.0 145 6.4 5.4 119 POWDER RIVER PASS 9480 12.5 9.7 129 14.5 10.1 144 SHELL CREEK 9580 15.9 13.5 118 14.6 11.5 127 SYLVAN LAKE 8420 24.4 20.0 122 26.2 17.4 151 SYLVAN ROAD 8120 -M 12.1 * -M 14.5 * TIMBER CREEK 7950 4.8 5.5 87 6.4 5.8 110 YOUNTS PEAK 8350 20.4 15.7 130 17.9 14.9 120 ----- ----- Basin wide percent of average 120 130 SHOSHONE RIVER BLACKWATER 9780 28.8 19.7 146 23.8 16.2 147 EVENING STAR 9200 32.1 24.3 132 -M 20.3 * KIRWIN 9550 11.9 8.8 135 13.7 9.4 146 MARQUETTE 8760 7.7 7.1 108 8.4 8.0 105 SYLVAN LAKE 8420 24.4 20.0 122 26.2 17.4 151 SYLVAN ROAD 8120 -M 12.1 * -M 14.5 * YOUNTS PEAK 8350 20.4 15.7 130 17.9 14.9 120 ----- ----- Basin wide percent of average 131 137 POWDER-TONGUE BEAR TRAP MEADOW 7900 7.1 6.4 111 9.0 7.0 129 BIG GOOSE 7990 6.1 -M * 9.2 -M * BONE SPRINGS DIV 9350 15.0 14.6 103 15.0 12.9 116 BURGESS JUNCTION 7880 8.1 10.5 77 9.9 9.6 103 CLOUD PEAK RESERVOIR 9860 14.2 12.6 113 12.4 11.4 109 DOME LAKE 8880 7.0 12.2 57 10.5 11.4 92 GRAVE SPRINGS 8550 7.9 8.3 95 10.5 8.2 128 HANSEN SAWMILL 8760 5.6 6.3 89 7.8 6.7 116 MIDDLE POWDER 7760 10.3 10.6 97 14.7 10.1 146 POWDER RIVER PASS 9480 12.5 9.7 129 14.5 10.1 144 SUCKER CREEK 8880 9.9 10.6 93 12.2 11.4 107 TIE CREEK 6870 3.7 -M * 7.9 9.2 86 ----- ----- Basin wide percent of average 96 115 BELLE FOURCHE BLIND PARK 6890 7.9 9.9 80 14.8 8.5 174 NORTH RAPID CREEK 6130 5.8 -M * 12.4 -M * WARREN PEAK 6520 10.7 9.9 108 13.8 6.8 203 ----- ----- Basin wide percent of average 94 187 UPPER N. PLATTE RIVER COLUMBINE 9400 20.2 22.9 88 20.9 21.9 95 DIVIDE PEAK 8800 17.3 18.3 95 22.6 20.2 112 ELK RIVER 8700 17.5 18.0 97 20.6 16.8 123 JOE WRIGHT 10120 19.1 19.1 100 24.7 21.9 113 NORTH FRENCH CREEK 10100 27.0 22.4 121 27.2 20.5 133 OLD BATTLE 10000 26.1 28.2 93 33.1 26.5 125 SOUTH BRUSH CREEK 8400 10.3 10.8 95 18.0 14.1 128 TOWER 10500 40.8 40.4 101 36.1 32.2 112 WEBBER SPRINGS 9200 17.8 24.3 73 23.8 22.3 107 WILLOW CREEK PASS 9540 10.9 10.2 107 11.2 10.9 103 ----- ----- Basin wide percent of average 96 115 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 18.9 22.0 86 20.8 16.9 123 CASPER MTN. 7900 10.7 13.6 79 15.5 11.9 130 DEADMAN HILL 10220 15.2 14.7 103 16.3 14.3 114 DEER PARK 9700 15.9 -M * 20.4 -M * LAPRELE CREEK 8320 -M 9.2 * 13.6 10.1 135 RENO HILL 8400 12.7 12.0 106 17.3 16.2 107 ROACH 9700 14.3 15.3 93 18.1 18.6 97 SAND LAKE 10080 31.4 29.2 108 26.4 17.8 148 SOUTH PASS 9040 16.7 14.9 112 17.7 15.0 118 WINDY PEAK 7840 6.2 7.3 85 12.1 8.0 151 ----- ----- Basin wide percent of average 98 123 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 12.8 10.6 121 16.2 13.6 119 DIVIDE PEAK 8800 17.3 18.3 95 22.6 20.2 112 OLD BATTLE 10000 26.1 28.2 93 33.1 26.5 125 SANDSTONE RS 8150 12.5 13.3 94 19.0 16.5 115 WHISKEY PARK 8950 25.2 25.7 98 27.6 24.5 113 ----- ----- Basin wide percent of average 98 117 UPPER GREEN RIVER BIG SANDY OPENING 9100 15.5 13.1 118 14.4 15.2 95 BLIND BULL SUM 8650 27.4 26.5 103 21.3 22.3 96 EAST RIM DIVIDE 7930 13.2 12.9 102 13.5 14.3 94 ELKHART PARK G.S. 9400 13.2 12.5 106 13.6 15.0 91 GROS VENTRE SUMMIT 8775 15.1 14.1 107 14.7 14.9 99 KENDALL R.S. 7740 15.1 14.0 108 15.3 14.6 105 LOOMIS PARK 8240 -M 16.2 * 19.3 17.7 109 NEW FORK LAKE 8340 12.1 10.5 115 11.5 13.6 85 SNIDER BASIN 8250 16.3 13.7 119 16.0 14.3 112 SPRING CREEK DIVIDE 9000 27.7 25.3 109 26.2 25.5 103 TRIPLE PEAK 8500 26.8 23.4 115 27.0 29.2 92 ----- ----- Basin wide percent of average 110 98 LOWER GREEN RIVER HAMS FORK 7840 13.9 11.6 120 10.7 12.5 86 HEWINTA 9500 11.0 9.7 113 13.2 11.2 118 HICKERSON PARK 9150 6.6 5.6 118 9.0 8.0 112 HOLE-IN-ROCK 9150 6.5 5.3 123 9.2 8.0 115 INDIAN CREEK 9425 27.7 25.4 109 22.7 24.0 95 KELLEY R.S. 8180 16.1 15.5 104 17.8 17.7 101 STEEL CREEK PARK 10100 13.6 13.9 98 15.5 11.2 138 ----- ----- Basin wide percent of average 110 106 UPPER BEAR RIVER BUG LAKE 7950 20.9 18.5 113 18.5 17.2 108 HAYDEN FORK 9400 15.7 15.0 105 18.9 16.6 114 KELLEY R.S. 8180 16.1 15.5 104 17.8 17.7 101 LILY LAKE 9050 13.0 11.5 113 17.0 12.8 133 MONTE CRISTO 8960 25.0 25.8 97 24.7 22.5 110 SALT RIVER SUMMIT 7600 15.5 13.0 119 17.6 15.9 111 TRIAL LAKE 9960 20.0 23.2 86 20.6 21.2 97 ----- ----- 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.