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 19 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 24.4 17.0 144 26.5 21.7 122 COTTONWOOD CREEK 7600 24.1 22.3 108 26.5 24.3 109 GRANITE CREEK 6770 21.0 17.5 120 22.6 22.8 99 GRASSY LAKE 7265 41.1 33.8 122 39.7 35.8 111 GROS VENTRE SUMMIT 8775 15.1 14.7 103 14.8 15.4 96 LEWIS LAKE DIVIDE 7860 40.2 33.5 120 38.9 36.3 107 PHILLIPS BENCH 8200 31.6 27.6 114 30.8 28.7 107 SALT RIVER SUMMIT 7600 15.4 13.6 113 17.7 16.4 108 SNAKE RIVER STATION 6920 21.9 18.0 122 25.1 25.1 100 SPRING CREEK DIVIDE 9000 28.0 26.4 106 26.8 26.4 102 THUMB DIVIDE 7980 -M 16.1 * -M 20.3 * TOGWOTEE PASS 9580 -M 23.4 * 27.5 27.2 101 TWO OCEAN PLATEAU 9360 34.8 25.2 138 -M 29.8 * WILLOW CREEK 8450 32.4 28.9 112 36.1 31.1 116 ----- ----- Basin wide percent of average 118 107 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 25.4 22.3 114 22.9 16.9 136 BLACK BEAR 7950 48.6 36.0 135 -M 38.1 * CANYON 7940 17.7 12.2 145 18.4 13.4 137 FISHER CREEK 9100 39.2 33.8 116 -M 34.4 * MADISON PLATEAU 7750 -M 23.2 * -M 24.6 * NORTHEAST ENTRANCE 7350 12.6 8.9 142 13.9 11.2 124 PARKER PEAK 9400 22.4 20.4 110 -M 14.6 * SYLVAN LAKE 8420 24.6 20.8 118 26.3 18.0 146 THUMB DIVIDE 7980 -M 16.1 * -M 20.3 * TWO OCEAN PLATEAU 9360 34.8 25.2 138 -M 29.8 * WHISKEY CREEK 6800 -M 16.4 * -M 20.4 * WHITE MILL 8700 27.2 23.9 114 24.3 26.6 91 WOLVERINE 7650 13.3 11.2 119 12.4 12.0 103 ----- ----- Basin wide percent of average 124 120* WIND RIVER BURROUGHS CREEK 8750 16.3 14.4 113 17.7 15.6 113 COLD SPRINGS 9630 8.9 7.9 113 11.0 9.7 113 DEER PARK 9700 15.8 -M * 20.7 -M * HOBBS PARK 10100 16.5 13.9 119 14.7 12.9 114 LITTLE WARM 9620 13.0 10.7 121 14.5 12.3 118 SOUTH PASS 9040 16.8 15.5 108 17.9 15.7 114 ST. LAWRENCE ALT 8620 6.6 7.1 93 9.5 9.3 102 TOGWOTEE PASS 9580 -M 23.4 * 27.5 27.2 101 TOWNSEND CREEK 8700 8.9 9.2 97 11.9 11.4 104 ----- ----- Basin wide percent of average 111 109 BIGHORN BASIN BALD MTN. 9375 19.1 19.2 99 17.8 16.0 111 BEAR TRAP MEADOW 7900 6.8 6.7 101 9.0 7.4 122 BLACKWATER 9780 29.1 20.7 141 24.0 16.9 142 BONE SPRINGS DIV 9350 15.3 15.3 100 15.2 13.7 111 EVENING STAR 9200 32.3 25.4 127 33.3 21.1 158 GRAVE SPRINGS 8550 7.9 8.8 90 10.5 8.7 121 KIRWIN 9550 12.0 9.2 130 13.8 9.9 139 MARQUETTE 8760 7.9 7.5 105 8.8 8.5 104 MIDDLE POWDER 7760 10.3 11.2 92 15.0 10.7 140 OWL CREEK 8975 5.9 4.2 140 6.5 5.7 114 POWDER RIVER PASS 9480 12.6 10.1 125 14.6 10.6 138 SHELL CREEK 9580 15.9 14.1 113 14.7 12.1 121 SYLVAN LAKE 8420 24.6 20.8 118 26.3 18.0 146 SYLVAN ROAD 8120 16.3 12.3 133 18.7 15.1 124 TIMBER CREEK 7950 4.8 5.8 83 6.4 6.2 103 YOUNTS PEAK 8350 20.4 16.3 125 18.2 15.5 117 ----- ----- Basin wide percent of average 116 129 SHOSHONE RIVER BLACKWATER 9780 29.1 20.7 141 24.0 16.9 142 EVENING STAR 9200 32.3 25.4 127 33.3 21.1 158 KIRWIN 9550 12.0 9.2 130 13.8 9.9 139 MARQUETTE 8760 7.9 7.5 105 8.8 8.5 104 SYLVAN LAKE 8420 24.6 20.8 118 26.3 18.0 146 SYLVAN ROAD 8120 16.3 12.3 133 18.7 15.1 124 YOUNTS PEAK 8350 20.4 16.3 125 18.2 15.5 117 ----- ----- Basin wide percent of average 127 136 POWDER-TONGUE BEAR TRAP MEADOW 7900 6.8 6.7 101 9.0 7.4 122 BIG GOOSE 7990 6.2 -M * 9.3 -M * BONE SPRINGS DIV 9350 15.3 15.3 100 15.2 13.7 111 BURGESS JUNCTION 7880 8.3 11.0 75 10.0 10.3 97 CLOUD PEAK RESERVOIR 9860 14.2 13.4 106 12.6 12.0 105 DOME LAKE 8880 -M 12.8 * 10.5 12.0 88 GRAVE SPRINGS 8550 7.9 8.8 90 10.5 8.7 121 HANSEN SAWMILL 8760 5.6 6.6 85 7.8 7.1 110 MIDDLE POWDER 7760 10.3 11.2 92 15.0 10.7 140 POWDER RIVER PASS 9480 12.6 10.1 125 14.6 10.6 138 SUCKER CREEK 8880 9.9 11.2 88 12.4 12.0 103 TIE CREEK 6870 -M -M * -M 9.8 * ----- ----- Basin wide percent of average 96 113 BELLE FOURCHE BLIND PARK 6890 8.1 10.3 79 14.8 9.0 164 NORTH RAPID CREEK 6130 5.8 -M * 12.5 -M * WARREN PEAK 6520 10.6 10.3 103 13.9 7.2 193 ----- ----- Basin wide percent of average 91 177 UPPER N. PLATTE RIVER COLUMBINE 9400 20.5 23.8 86 20.9 22.8 92 DIVIDE PEAK 8800 17.3 19.3 90 22.6 21.1 107 ELK RIVER 8700 17.6 18.8 94 20.9 17.6 119 JOE WRIGHT 10120 19.6 20.2 97 25.1 23.0 109 NORTH FRENCH CREEK 10100 27.6 23.5 117 27.2 21.6 126 OLD BATTLE 10000 26.2 29.5 89 33.2 27.8 119 SOUTH BRUSH CREEK 8400 11.0 11.7 94 18.1 14.9 121 TOWER 10500 41.0 42.2 97 36.7 33.6 109 WEBBER SPRINGS 9200 17.9 25.7 70 24.2 23.3 104 WILLOW CREEK PASS 9540 11.1 10.9 102 11.4 11.5 99 ----- ----- Basin wide percent of average 93 111 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 16.5 23.5 70 20.8 17.8 117 CASPER MTN. 7900 10.6 14.5 73 15.5 12.7 122 DEADMAN HILL 10220 15.4 15.4 100 16.5 15.1 109 DEER PARK 9700 15.8 -M * 20.7 -M * LAPRELE CREEK 8320 -M 9.7 * 13.7 10.7 128 RENO HILL 8400 12.7 12.8 99 17.4 17.3 101 ROACH 9700 14.7 16.0 92 18.3 19.5 94 SAND LAKE 10080 31.7 30.6 104 26.4 18.7 141 SOUTH PASS 9040 16.8 15.5 108 17.9 15.7 114 WINDY PEAK 7840 6.2 7.9 78 12.2 8.5 144 ----- ----- Basin wide percent of average 91 117 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 12.6 10.9 116 16.2 14.2 114 DIVIDE PEAK 8800 17.3 19.3 90 22.6 21.1 107 OLD BATTLE 10000 26.2 29.5 89 33.2 27.8 119 SANDSTONE RS 8150 11.9 13.9 86 18.9 17.3 109 WHISKEY PARK 8950 24.5 26.9 91 27.6 25.8 107 ----- ----- Basin wide percent of average 92 112 UPPER GREEN RIVER BIG SANDY OPENING 9100 15.5 13.7 113 14.5 15.7 92 BLIND BULL SUM 8650 27.6 27.7 100 21.4 23.1 93 EAST RIM DIVIDE 7930 13.2 13.4 99 13.5 14.7 92 ELKHART PARK G.S. 9400 13.3 13.1 102 13.7 15.5 88 GROS VENTRE SUMMIT 8775 15.1 14.7 103 14.8 15.4 96 KENDALL R.S. 7740 15.3 14.5 106 15.4 15.1 102 LOOMIS PARK 8240 -M 16.8 * 19.3 18.3 105 NEW FORK LAKE 8340 12.2 10.8 113 11.5 14.0 82 SNIDER BASIN 8250 16.5 14.2 116 16.0 14.7 109 SPRING CREEK DIVIDE 9000 28.0 26.4 106 26.8 26.4 102 TRIPLE PEAK 8500 26.8 24.3 110 27.9 30.1 93 ----- ----- Basin wide percent of average 106 96 LOWER GREEN RIVER HAMS FORK 7840 13.8 12.0 115 10.7 12.9 83 HEWINTA 9500 11.3 10.4 109 13.5 11.9 113 HICKERSON PARK 9150 6.6 6.1 108 9.1 8.5 107 HOLE-IN-ROCK 9150 6.7 5.7 118 -M 8.5 * INDIAN CREEK 9425 27.8 26.8 104 22.9 24.9 92 KELLEY R.S. 8180 16.2 16.2 100 17.8 18.2 98 STEEL CREEK PARK 10100 13.7 14.8 93 15.6 11.8 132 ----- ----- Basin wide percent of average 104 102 UPPER BEAR RIVER BUG LAKE 7950 21.1 19.5 108 18.6 18.0 103 HAYDEN FORK 9400 15.5 15.7 99 19.6 17.5 112 KELLEY R.S. 8180 16.2 16.2 100 17.8 18.2 98 LILY LAKE 9050 13.1 12.2 107 17.2 13.5 127 MONTE CRISTO 8960 24.8 27.2 91 24.8 23.6 105 SALT RIVER SUMMIT 7600 15.4 13.6 113 17.7 16.4 108 TRIAL LAKE 9960 20.1 24.0 84 20.7 22.2 93 ----- ----- Basin wide percent of average 98 105 ----------------------------------------------------------------------------- -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.