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 SATURDAY: APRIL 10 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 23.9 16.7 144 27.9 23.7 119 COTTONWOOD CREEK 7600 26.4 23.9 111 29.4 26.5 111 GRANITE CREEK 6770 -M 18.2 * -M 24.9 * GRASSY LAKE 7265 43.9 37.3 118 42.3 39.3 108 GROS VENTRE SUMMIT 8775 16.7 16.0 105 16.7 16.9 99 LEWIS LAKE DIVIDE 7860 41.8 36.5 115 41.2 39.9 104 PHILLIPS BENCH 8200 34.3 30.4 113 33.3 31.7 106 SALT RIVER SUMMIT 7600 16.9 14.1 120 19.2 17.9 108 SNAKE RIVER STATION 6920 22.2 18.7 119 26.4 27.7 96 SPRING CREEK DIVIDE 9000 32.2 29.2 111 29.4 29.0 102 THUMB DIVIDE 7980 -M 17.4 * -M 22.0 * TOGWOTEE PASS 9580 -M 26.4 * 29.7 29.9 99 TWO OCEAN PLATEAU 9360 37.8 26.7 142 31.9 32.4 99 WILLOW CREEK 8450 34.9 31.4 112 39.0 33.9 116 ----- ----- Basin wide percent of average 118 105 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 27.0 24.9 109 24.4 19.2 127 BLACK BEAR 7950 51.5 39.7 131 -M 42.9 * CANYON 7940 18.7 13.5 139 20.2 15.0 135 FISHER CREEK 9100 41.2 37.3 111 37.8 38.8 98 MADISON PLATEAU 7750 -M 25.4 * -M 27.7 * NORTHEAST ENTRANCE 7350 12.7 9.1 140 14.7 12.6 117 PARKER PEAK 9400 25.2 22.9 111 -M 16.5 * SYLVAN LAKE 8420 27.5 23.4 118 29.2 20.4 144 THUMB DIVIDE 7980 -M 17.4 * -M 22.0 * TWO OCEAN PLATEAU 9360 37.8 26.7 142 31.9 32.4 99 WHISKEY CREEK 6800 22.0 18.0 123 25.4 23.2 110 WHITE MILL 8700 28.9 25.7 113 25.7 29.9 86 WOLVERINE 7650 12.9 11.9 109 13.2 13.6 98 ----- ----- Basin wide percent of average 121 109 WIND RIVER BURROUGHS CREEK 8750 17.9 15.2 118 19.2 17.7 109 COLD SPRINGS 9630 10.0 8.6 116 13.2 11.5 116 DEER PARK 9700 18.4 -M * 23.7 -M * HOBBS PARK 10100 19.2 16.0 120 17.9 15.2 118 LITTLE WARM 9620 15.6 13.0 121 17.4 14.4 122 SOUTH PASS 9040 19.5 17.2 114 20.7 18.2 114 ST. LAWRENCE ALT 8620 7.6 7.3 105 11.5 11.0 106 TOGWOTEE PASS 9580 -M 26.4 * 29.7 29.9 99 TOWNSEND CREEK 8700 11.2 10.4 109 14.7 13.5 109 ----- ----- Basin wide percent of average 116 110 BIGHORN BASIN BALD MTN. 9375 20.9 21.7 96 19.0 18.5 103 BEAR TRAP MEADOW 7900 4.3 7.1 60 10.2 9.0 114 BLACKWATER 9780 31.9 23.9 134 26.4 18.9 140 BONE SPRINGS DIV 9350 18.5 17.7 106 17.4 16.2 109 EVENING STAR 9200 34.3 28.5 121 35.8 23.7 151 GRAVE SPRINGS 8550 9.5 10.4 92 12.5 10.5 120 KIRWIN 9550 13.6 10.9 126 15.2 11.6 132 MARQUETTE 8760 10.0 8.5 117 10.6 10.9 99 MIDDLE POWDER 7760 13.1 13.1 100 17.4 12.9 136 OWL CREEK 8975 7.0 4.8 147 7.3 6.8 108 POWDER RIVER PASS 9480 12.6 11.5 111 15.7 12.5 126 SHELL CREEK 9580 17.4 15.9 110 15.9 14.0 113 SYLVAN LAKE 8420 27.5 23.4 118 29.2 20.4 144 SYLVAN ROAD 8120 17.4 11.5 152 20.2 17.0 119 TIMBER CREEK 7950 6.0 6.5 91 8.0 8.0 99 YOUNTS PEAK 8350 22.2 18.0 124 19.7 17.5 113 ----- ----- Basin wide percent of average 115 123 SHOSHONE RIVER BLACKWATER 9780 31.9 23.9 134 26.4 18.9 140 EVENING STAR 9200 34.3 28.5 121 35.8 23.7 151 KIRWIN 9550 13.6 10.9 126 15.2 11.6 132 MARQUETTE 8760 10.0 8.5 117 10.6 10.9 99 SYLVAN LAKE 8420 27.5 23.4 118 29.2 20.4 144 SYLVAN ROAD 8120 17.4 11.5 152 20.2 17.0 119 YOUNTS PEAK 8350 22.2 18.0 124 19.7 17.5 113 ----- ----- Basin wide percent of average 126 131 POWDER-TONGUE BEAR TRAP MEADOW 7900 4.3 7.1 60 10.2 9.0 114 BIG GOOSE 7990 8.1 -M * 11.6 -M * BONE SPRINGS DIV 9350 18.5 17.7 106 17.4 16.2 109 BURGESS JUNCTION 7880 10.2 12.6 81 12.0 12.5 96 CLOUD PEAK RESERVOIR 9860 16.9 16.2 105 15.0 14.5 103 DOME LAKE 8880 -M 14.5 * 12.4 14.2 87 GRAVE SPRINGS 8550 9.5 10.4 92 12.5 10.5 120 HANSEN SAWMILL 8760 4.8 7.5 65 9.1 8.7 105 MIDDLE POWDER 7760 13.1 13.1 100 17.4 12.9 136 POWDER RIVER PASS 9480 12.6 11.5 111 15.7 12.5 126 SUCKER CREEK 8880 11.5 13.0 88 14.1 14.2 100 TIE CREEK 6870 -M -M * -M 12.0 * ----- ----- Basin wide percent of average 93 109 BELLE FOURCHE BLIND PARK 6890 6.5 11.5 56 16.5 11.2 148 NORTH RAPID CREEK 6130 6.3 -M * 14.0 -M * WARREN PEAK 6520 10.9 11.5 94 -M 8.7 * ----- ----- Basin wide percent of average 75 148* UPPER N. PLATTE RIVER COLUMBINE 9400 19.0 24.7 78 22.7 25.7 89 DIVIDE PEAK 8800 20.9 21.7 97 25.7 24.2 107 ELK RIVER 8700 17.2 20.4 85 23.4 20.2 117 JOE WRIGHT 10120 21.2 23.5 91 27.2 26.7 102 NORTH FRENCH CREEK 10100 32.3 27.4 118 30.5 24.9 123 OLD BATTLE 10000 31.5 34.7 92 37.5 31.9 118 SOUTH BRUSH CREEK 8400 11.7 13.2 89 20.2 17.7 115 TOWER 10500 46.8 47.8 98 39.9 38.4 104 WEBBER SPRINGS 9200 20.0 28.5 71 27.7 26.9 103 WILLOW CREEK PASS 9540 12.7 13.0 98 12.5 13.5 92 ----- ----- Basin wide percent of average 92 107 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 16.2 28.2 58 23.2 20.9 112 CASPER MTN. 7900 12.0 18.2 66 17.5 15.5 113 DEADMAN HILL 10220 16.5 17.4 95 17.4 18.2 97 DEER PARK 9700 18.4 -M * 23.7 -M * LAPRELE CREEK 8320 -M 10.4 * 15.1 12.7 119 RENO HILL 8400 14.7 15.2 97 19.2 20.2 96 ROACH 9700 15.5 17.9 87 20.2 22.7 89 SAND LAKE 10080 37.0 34.8 107 29.7 21.7 137 SOUTH PASS 9040 19.5 17.2 114 20.7 18.2 114 WINDY PEAK 7840 7.0 9.2 77 13.5 10.5 130 ----- ----- Basin wide percent of average 88 111 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 12.1 11.1 110 18.4 16.4 113 DIVIDE PEAK 8800 20.9 21.7 97 25.7 24.2 107 OLD BATTLE 10000 31.5 34.7 92 37.5 31.9 118 SANDSTONE RS 8150 13.6 15.2 90 21.9 20.0 110 WHISKEY PARK 8950 28.5 30.2 95 31.2 30.0 105 ----- ----- Basin wide percent of average 95 110 UPPER GREEN RIVER BIG SANDY OPENING 9100 16.7 15.2 110 16.2 17.2 94 BLIND BULL SUM 8650 29.2 30.7 96 23.2 25.4 92 EAST RIM DIVIDE 7930 14.5 14.7 99 14.9 16.2 92 ELKHART PARK G.S. 9400 14.9 14.7 101 15.7 16.9 93 GROS VENTRE SUMMIT 8775 16.7 16.0 105 16.7 16.9 99 KENDALL R.S. 7740 16.0 13.7 117 17.2 16.5 104 LOOMIS PARK 8240 -M 17.2 * 21.2 20.0 106 NEW FORK LAKE 8340 13.4 11.0 121 12.5 15.4 82 SNIDER BASIN 8250 18.5 15.4 121 18.7 16.2 117 SPRING CREEK DIVIDE 9000 32.2 29.2 111 29.4 29.0 102 TRIPLE PEAK 8500 31.4 26.7 119 31.7 32.8 97 ----- ----- Basin wide percent of average 109 98 LOWER GREEN RIVER HAMS FORK 7840 14.7 8.1 182 12.5 14.2 88 HEWINTA 9500 13.5 10.0 136 15.2 14.1 108 HICKERSON PARK 9150 6.3 6.8 93 10.5 10.5 100 HOLE-IN-ROCK 9150 7.0 6.5 108 10.9 10.5 104 INDIAN CREEK 9425 31.9 30.0 107 26.7 27.4 98 KELLEY R.S. 8180 18.0 17.5 103 19.9 19.9 100 STEEL CREEK PARK 10100 16.0 17.5 91 17.9 13.9 129 ----- ----- Basin wide percent of average 112 103 UPPER BEAR RIVER BUG LAKE 7950 24.4 20.5 119 21.7 20.7 105 HAYDEN FORK 9400 16.0 13.0 124 21.4 20.4 105 KELLEY R.S. 8180 18.0 17.5 103 19.9 19.9 100 LILY LAKE 9050 12.6 13.1 97 19.2 15.9 121 MONTE CRISTO 8960 28.5 29.7 97 27.9 27.2 103 SALT RIVER SUMMIT 7600 16.9 14.1 120 19.2 17.9 108 TRIAL LAKE 9960 22.4 25.7 87 23.4 25.4 93 ----- ----- Basin wide percent of average 104 104 ----------------------------------------------------------------------------- -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.