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: APRIL 21 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 20.7 14.1 147 28.7 24.5 117 COTTONWOOD CREEK 7600 24.2 22.2 110 29.9 27.4 110 GRANITE CREEK 6770 20.7 16.0 130 24.2 25.9 94 GRASSY LAKE 7265 42.5 36.4 117 44.2 40.8 109 GROS VENTRE SUMMIT 8775 16.5 15.4 108 16.9 17.7 96 LEWIS LAKE DIVIDE 7860 41.0 35.9 115 42.2 41.4 102 PHILLIPS BENCH 8200 35.4 30.4 117 33.8 32.8 104 SALT RIVER SUMMIT 7600 15.2 12.7 120 19.5 18.7 105 SNAKE RIVER STATION 6920 19.7 17.9 111 27.4 28.5 97 SPRING CREEK DIVIDE 9000 31.9 29.5 109 30.4 30.0 102 THUMB DIVIDE 7980 -M 16.7 * -M 22.9 * TOGWOTEE PASS 9580 -M 27.5 * 30.9 31.0 100 TWO OCEAN PLATEAU 9360 40.5 27.0 150 33.8 33.8 100 WILLOW CREEK 8450 33.0 31.9 104 40.4 35.3 115 ----- ----- Basin wide percent of average 119 104 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 27.7 25.7 108 24.9 20.4 123 BLACK BEAR 7950 47.2 40.2 118 -M 44.8 * CANYON 7940 17.5 12.6 139 20.4 15.7 130 FISHER CREEK 9100 37.5 38.3 98 38.9 40.7 96 MADISON PLATEAU 7750 -M 25.0 * 34.0 28.9 118 NORTHEAST ENTRANCE 7350 10.5 8.0 133 15.0 13.4 113 PARKER PEAK 9400 25.9 23.4 111 -M 17.4 * SYLVAN LAKE 8420 27.7 23.9 116 30.2 21.4 142 THUMB DIVIDE 7980 -M 16.7 * -M 22.9 * TWO OCEAN PLATEAU 9360 40.5 27.0 150 33.8 33.8 100 WHISKEY CREEK 6800 21.7 17.2 127 25.7 24.0 108 WHITE MILL 8700 29.2 26.0 112 26.2 31.4 84 WOLVERINE 7650 12.1 10.5 116 13.7 14.5 95 ----- ----- Basin wide percent of average 118 108 WIND RIVER BURROUGHS CREEK 8750 17.7 14.5 122 19.4 18.5 105 COLD SPRINGS 9630 9.4 8.0 117 13.5 12.4 109 DEER PARK 9700 18.2 -M * 24.7 -M * HOBBS PARK 10100 19.9 17.2 116 18.2 16.4 112 LITTLE WARM 9620 15.6 12.5 126 17.7 15.5 115 SOUTH PASS 9040 17.7 17.9 100 21.7 19.5 111 ST. LAWRENCE ALT 8620 8.1 6.5 125 12.0 11.9 101 TOGWOTEE PASS 9580 -M 27.5 * 30.9 31.0 100 TOWNSEND CREEK 8700 11.1 10.1 110 15.6 14.6 107 ----- ----- Basin wide percent of average 115 107 BIGHORN BASIN BALD MTN. 9375 22.4 23.0 98 20.7 19.7 106 BEAR TRAP MEADOW 7900 1.2 6.0 21 11.2 10.0 114 BLACKWATER 9780 32.8 25.2 131 27.0 19.9 137 BONE SPRINGS DIV 9350 19.9 18.4 109 19.9 17.2 116 EVENING STAR 9200 35.2 29.9 118 36.7 24.9 147 GRAVE SPRINGS 8550 10.7 11.0 98 14.0 11.5 121 KIRWIN 9550 13.7 11.5 121 15.6 12.5 125 MARQUETTE 8760 11.1 8.7 128 12.1 12.2 100 MIDDLE POWDER 7760 16.9 14.1 120 20.0 14.0 144 OWL CREEK 8975 6.5 4.3 149 7.8 7.5 105 POWDER RIVER PASS 9480 12.9 11.2 115 17.2 13.7 126 SHELL CREEK 9580 18.0 16.5 110 16.9 15.0 113 SYLVAN LAKE 8420 27.7 23.9 116 30.2 21.4 142 SYLVAN ROAD 8120 15.7 9.9 161 20.9 17.9 117 TIMBER CREEK 7950 6.0 6.5 93 9.0 9.1 98 YOUNTS PEAK 8350 22.4 18.4 122 20.5 18.5 111 ----- ----- Basin wide percent of average 115 123 SHOSHONE RIVER BLACKWATER 9780 32.8 25.2 131 27.0 19.9 137 EVENING STAR 9200 35.2 29.9 118 36.7 24.9 147 KIRWIN 9550 13.7 11.5 121 15.6 12.5 125 MARQUETTE 8760 11.1 8.7 128 12.1 12.2 100 SYLVAN LAKE 8420 27.7 23.9 116 30.2 21.4 142 SYLVAN ROAD 8120 15.7 9.9 161 20.9 17.9 117 YOUNTS PEAK 8350 22.4 18.4 122 20.5 18.5 111 ----- ----- Basin wide percent of average 125 129 POWDER-TONGUE BEAR TRAP MEADOW 7900 1.2 6.0 21 11.2 10.0 114 BIG GOOSE 7990 9.7 -M * 14.0 -M * BONE SPRINGS DIV 9350 19.9 18.4 109 19.9 17.2 116 BURGESS JUNCTION 7880 12.0 13.2 91 14.1 13.5 105 CLOUD PEAK RESERVOIR 9860 20.0 17.2 117 18.4 16.0 116 DOME LAKE 8880 -M 15.0 * 14.2 15.5 93 GRAVE SPRINGS 8550 10.7 11.0 98 14.0 11.5 121 HANSEN SAWMILL 8760 4.6 7.5 63 11.0 9.6 114 MIDDLE POWDER 7760 16.9 14.1 120 20.0 14.0 144 POWDER RIVER PASS 9480 12.9 11.2 115 17.2 13.7 126 SUCKER CREEK 8880 13.6 13.5 101 17.2 15.5 112 TIE CREEK 6870 -M -M * -M 13.0 * ----- ----- Basin wide percent of average 100 116 BELLE FOURCHE BLIND PARK 6890 4.5 11.0 42 17.5 12.6 139 NORTH RAPID CREEK 6130 5.5 -M * 15.6 -M * WARREN PEAK 6520 11.2 11.0 103 12.5 9.6 130 ----- ----- Basin wide percent of average 73 135 UPPER N. PLATTE RIVER COLUMBINE 9400 17.4 23.7 74 24.2 27.0 90 DIVIDE PEAK 8800 21.4 20.9 103 27.7 25.9 107 ELK RIVER 8700 15.1 18.9 80 24.0 21.2 114 JOE WRIGHT 10120 22.0 24.4 91 28.7 28.7 101 NORTH FRENCH CREEK 10100 34.8 28.7 121 33.2 26.7 125 OLD BATTLE 10000 33.4 36.8 91 39.8 33.9 118 SOUTH BRUSH CREEK 8400 10.5 12.2 87 21.4 19.2 111 TOWER 10500 49.2 49.8 99 41.8 40.9 103 WEBBER SPRINGS 9200 20.9 27.7 76 29.2 28.9 102 WILLOW CREEK PASS 9540 13.2 13.5 98 13.5 14.5 93 ----- ----- Basin wide percent of average 93 107 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 16.2 29.0 56 24.9 22.4 111 CASPER MTN. 7900 15.0 18.7 81 20.4 17.4 118 DEADMAN HILL 10220 17.9 18.4 98 19.2 19.7 98 DEER PARK 9700 18.2 -M * 24.7 -M * LAPRELE CREEK 8320 -M 8.7 * 17.4 13.9 127 RENO HILL 8400 17.2 14.9 117 22.9 21.4 107 ROACH 9700 18.0 18.2 99 22.9 24.4 94 SAND LAKE 10080 40.2 36.3 111 32.3 23.4 139 SOUTH PASS 9040 17.7 17.9 100 21.7 19.5 111 WINDY PEAK 7840 7.0 8.9 79 15.0 11.5 132 ----- ----- Basin wide percent of average 92 114 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 7.5 8.7 87 19.4 17.5 111 DIVIDE PEAK 8800 21.4 20.9 103 27.7 25.9 107 OLD BATTLE 10000 33.4 36.8 91 39.8 33.9 118 SANDSTONE RS 8150 11.9 13.4 89 22.7 21.7 105 WHISKEY PARK 8950 29.4 30.4 98 32.5 32.2 102 ----- ----- Basin wide percent of average 95 109 UPPER GREEN RIVER BIG SANDY OPENING 9100 16.2 15.0 109 16.5 17.9 93 BLIND BULL SUM 8650 30.2 27.9 108 23.5 26.2 90 EAST RIM DIVIDE 7930 14.4 15.0 96 15.0 16.9 90 ELKHART PARK G.S. 9400 14.9 14.7 101 16.0 17.7 91 GROS VENTRE SUMMIT 8775 16.5 15.4 108 16.9 17.7 96 KENDALL R.S. 7740 14.5 12.2 119 17.7 17.2 103 LOOMIS PARK 8240 -M 16.4 * 21.4 20.9 103 NEW FORK LAKE 8340 12.6 10.1 125 13.0 16.0 82 SNIDER BASIN 8250 17.4 14.6 119 18.9 16.7 114 SPRING CREEK DIVIDE 9000 31.9 29.5 109 30.4 30.0 102 TRIPLE PEAK 8500 28.2 26.2 108 32.3 34.0 95 ----- ----- Basin wide percent of average 109 96 LOWER GREEN RIVER HAMS FORK 7840 11.5 5.8 199 12.5 14.9 85 HEWINTA 9500 10.1 7.8 132 15.5 15.4 102 HICKERSON PARK 9150 3.9 5.3 74 10.5 11.5 92 HOLE-IN-ROCK 9150 6.6 4.8 138 11.0 11.5 97 INDIAN CREEK 9425 32.3 29.9 108 27.2 28.4 96 KELLEY R.S. 8180 16.4 16.7 98 20.2 20.7 98 STEEL CREEK PARK 10100 16.0 18.4 88 18.2 15.1 120 ----- ----- Basin wide percent of average 110 98 UPPER BEAR RIVER BUG LAKE 7950 22.0 18.5 119 21.9 21.7 101 HAYDEN FORK 9400 11.6 9.4 125 22.2 21.9 102 KELLEY R.S. 8180 16.4 16.7 98 20.2 20.7 98 LILY LAKE 9050 11.4 11.5 100 19.4 17.0 114 MONTE CRISTO 8960 27.4 28.2 98 28.7 28.9 100 SALT RIVER SUMMIT 7600 15.2 12.7 120 19.5 18.7 105 TRIAL LAKE 9960 20.4 25.4 81 23.7 26.9 89 ----- ----- Basin wide percent of average 102 100 ----------------------------------------------------------------------------- -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.