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: APRIL 4 , 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 17.5 137 27.4 23.2 119 COTTONWOOD CREEK 7600 25.4 24.4 105 28.4 26.0 109 GRANITE CREEK 6770 22.2 18.7 119 23.2 24.4 96 GRASSY LAKE 7265 43.2 36.8 118 40.8 38.5 106 GROS VENTRE SUMMIT 8775 16.2 16.0 102 15.9 16.5 96 LEWIS LAKE DIVIDE 7860 40.8 36.0 114 40.2 39.2 103 PHILLIPS BENCH 8200 32.8 29.9 110 31.9 31.0 103 SALT RIVER SUMMIT 7600 16.4 14.5 114 18.7 17.5 107 SNAKE RIVER STATION 6920 22.4 18.9 120 25.9 27.0 96 SPRING CREEK DIVIDE 9000 30.7 28.7 108 28.5 28.4 101 THUMB DIVIDE 7980 -M 17.4 * -M 21.7 * TOGWOTEE PASS 9580 -M 25.7 * 28.7 29.4 98 TWO OCEAN PLATEAU 9360 36.7 26.9 137 31.5 31.9 100 WILLOW CREEK 8450 33.8 30.9 110 38.3 33.3 115 ----- ----- Basin wide percent of average 116 104 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 26.4 24.2 109 23.4 18.5 126 BLACK BEAR 7950 50.8 38.9 131 -M 41.9 * CANYON 7940 18.0 13.2 137 19.4 14.6 133 FISHER CREEK 9100 40.2 36.5 110 36.7 37.8 98 MADISON PLATEAU 7750 -M 25.0 * 31.7 27.2 117 NORTHEAST ENTRANCE 7350 11.4 9.2 123 14.0 12.2 115 PARKER PEAK 9400 23.9 22.2 108 -M 16.0 * SYLVAN LAKE 8420 26.4 22.7 117 27.9 19.7 142 THUMB DIVIDE 7980 -M 17.4 * -M 21.7 * TWO OCEAN PLATEAU 9360 36.7 26.9 137 31.5 31.9 100 WHISKEY CREEK 6800 20.9 17.7 119 23.9 22.5 107 WHITE MILL 8700 27.9 25.4 111 24.7 29.2 85 WOLVERINE 7650 12.2 11.9 104 13.0 13.1 99 ----- ----- Basin wide percent of average 119 109 WIND RIVER BURROUGHS CREEK 8750 17.0 15.1 113 18.4 17.0 109 COLD SPRINGS 9630 9.5 8.5 111 12.9 11.0 118 DEER PARK 9700 17.5 -M * 22.9 -M * HOBBS PARK 10100 18.4 15.5 119 17.4 14.6 119 LITTLE WARM 9620 15.0 12.1 124 16.4 13.7 119 SOUTH PASS 9040 18.9 16.7 113 19.9 17.5 114 ST. LAWRENCE ALT 8620 8.0 7.5 106 11.5 10.5 109 TOGWOTEE PASS 9580 -M 25.7 * 28.7 29.4 98 TOWNSEND CREEK 8700 11.0 10.1 108 14.1 13.0 110 ----- ----- Basin wide percent of average 114 110 BIGHORN BASIN BALD MTN. 9375 20.4 20.9 98 18.4 17.9 104 BEAR TRAP MEADOW 7900 5.3 7.3 73 10.0 8.5 118 BLACKWATER 9780 31.0 22.9 136 25.7 18.4 140 BONE SPRINGS DIV 9350 17.2 16.9 102 16.7 15.5 108 EVENING STAR 9200 33.8 27.7 122 34.9 23.2 152 GRAVE SPRINGS 8550 8.7 10.0 88 11.7 10.0 119 KIRWIN 9550 12.9 10.4 125 14.9 11.1 134 MARQUETTE 8760 9.0 8.4 109 9.6 10.0 96 MIDDLE POWDER 7760 11.6 12.5 93 16.2 12.2 132 OWL CREEK 8975 7.0 4.8 147 7.0 6.5 110 POWDER RIVER PASS 9480 12.4 11.1 111 15.5 12.0 131 SHELL CREEK 9580 17.0 15.4 112 15.7 13.5 118 SYLVAN LAKE 8420 26.4 22.7 117 27.9 19.7 142 SYLVAN ROAD 8120 17.4 12.2 142 19.7 16.5 120 TIMBER CREEK 7950 5.6 6.5 88 7.6 7.5 103 YOUNTS PEAK 8350 21.7 17.7 123 19.2 17.0 113 ----- ----- Basin wide percent of average 114 124 SHOSHONE RIVER BLACKWATER 9780 31.0 22.9 136 25.7 18.4 140 EVENING STAR 9200 33.8 27.7 122 34.9 23.2 152 KIRWIN 9550 12.9 10.4 125 14.9 11.1 134 MARQUETTE 8760 9.0 8.4 109 9.6 10.0 96 SYLVAN LAKE 8420 26.4 22.7 117 27.9 19.7 142 SYLVAN ROAD 8120 17.4 12.2 142 19.7 16.5 120 YOUNTS PEAK 8350 21.7 17.7 123 19.2 17.0 113 ----- ----- Basin wide percent of average 125 131 POWDER-TONGUE BEAR TRAP MEADOW 7900 5.3 7.3 73 10.0 8.5 118 BIG GOOSE 7990 7.3 -M * 10.9 -M * BONE SPRINGS DIV 9350 17.2 16.9 102 16.7 15.5 108 BURGESS JUNCTION 7880 9.5 12.1 78 11.2 11.9 95 CLOUD PEAK RESERVOIR 9860 16.0 15.5 104 14.2 13.7 104 DOME LAKE 8880 -M 14.1 * 12.0 13.6 88 GRAVE SPRINGS 8550 8.7 10.0 88 11.7 10.0 119 HANSEN SAWMILL 8760 5.1 7.3 70 9.0 8.2 110 MIDDLE POWDER 7760 11.6 12.5 93 16.2 12.2 132 POWDER RIVER PASS 9480 12.4 11.1 111 15.5 12.0 131 SUCKER CREEK 8880 11.2 12.5 90 13.5 13.5 100 TIE CREEK 6870 3.2 -M * 9.5 11.4 84 ----- ----- Basin wide percent of average 93 107 BELLE FOURCHE BLIND PARK 6890 7.1 11.4 63 16.2 10.5 156 NORTH RAPID CREEK 6130 6.3 -M * 13.6 -M * WARREN PEAK 6520 11.1 11.4 99 15.5 8.4 186 ----- ----- Basin wide percent of average 81 169 UPPER N. PLATTE RIVER COLUMBINE 9400 18.7 24.9 76 21.7 24.9 88 DIVIDE PEAK 8800 19.5 21.5 91 24.7 23.4 107 ELK RIVER 8700 16.4 20.2 82 22.0 19.5 113 JOE WRIGHT 10120 20.2 22.7 89 26.4 25.7 103 NORTH FRENCH CREEK 10100 30.0 26.2 115 28.9 24.0 121 OLD BATTLE 10000 29.5 33.0 90 35.8 30.9 117 SOUTH BRUSH CREEK 8400 11.4 13.5 85 19.7 16.9 118 TOWER 10500 44.4 46.3 97 38.8 37.0 105 WEBBER SPRINGS 9200 19.4 28.4 68 26.2 25.9 102 WILLOW CREEK PASS 9540 12.4 12.5 100 12.0 13.0 94 ----- ----- Basin wide percent of average 90 107 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 15.5 27.0 58 22.4 19.9 113 CASPER MTN. 7900 11.6 17.2 68 16.7 14.5 116 DEADMAN HILL 10220 15.9 16.9 94 17.0 17.2 99 DEER PARK 9700 17.5 -M * 22.9 -M * LAPRELE CREEK 8320 -M 10.5 * 14.7 12.1 122 RENO HILL 8400 14.5 14.7 99 18.9 19.7 96 ROACH 9700 15.5 17.7 89 19.7 21.7 91 SAND LAKE 10080 34.8 33.8 104 28.5 20.9 138 SOUTH PASS 9040 18.9 16.7 113 19.9 17.5 114 WINDY PEAK 7840 6.8 9.0 76 13.2 9.9 135 ----- ----- Basin wide percent of average 88 112 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 11.5 11.4 101 17.7 15.7 113 DIVIDE PEAK 8800 19.5 21.5 91 24.7 23.4 107 OLD BATTLE 10000 29.5 33.0 90 35.8 30.9 117 SANDSTONE RS 8150 12.5 15.1 83 20.7 19.2 109 WHISKEY PARK 8950 26.7 29.4 91 29.5 28.9 103 ----- ----- Basin wide percent of average 91 110 UPPER GREEN RIVER BIG SANDY OPENING 9100 16.4 15.0 110 15.5 16.9 93 BLIND BULL SUM 8650 -M 30.2 * 22.7 24.9 92 EAST RIM DIVIDE 7930 14.2 14.4 100 14.5 15.7 93 ELKHART PARK G.S. 9400 14.0 14.2 99 14.7 16.5 90 GROS VENTRE SUMMIT 8775 16.2 16.0 102 15.9 16.5 96 KENDALL R.S. 7740 15.1 14.5 105 16.4 16.2 102 LOOMIS PARK 8240 -M 17.5 * 20.7 19.7 106 NEW FORK LAKE 8340 12.6 11.2 113 11.9 15.0 79 SNIDER BASIN 8250 17.7 15.1 118 18.0 15.7 115 SPRING CREEK DIVIDE 9000 30.7 28.7 108 28.5 28.4 101 TRIPLE PEAK 8500 30.4 26.2 117 30.7 32.2 96 ----- ----- Basin wide percent of average 108 97 LOWER GREEN RIVER HAMS FORK 7840 14.4 11.0 132 12.0 14.0 86 HEWINTA 9500 12.5 11.0 114 14.7 13.5 109 HICKERSON PARK 9150 6.3 7.0 92 10.1 9.9 104 HOLE-IN-ROCK 9150 6.8 6.5 104 -M 9.9 * INDIAN CREEK 9425 30.7 29.4 105 25.5 26.9 95 KELLEY R.S. 8180 17.2 17.4 99 18.9 19.5 97 STEEL CREEK PARK 10100 14.7 16.9 87 16.9 13.2 128 ----- ----- Basin wide percent of average 104 102 UPPER BEAR RIVER BUG LAKE 7950 22.7 21.2 108 20.7 20.0 104 HAYDEN FORK 9400 15.5 15.4 101 20.5 19.5 106 KELLEY R.S. 8180 17.2 17.4 99 18.9 19.5 97 LILY LAKE 9050 12.4 13.4 93 18.4 15.2 122 MONTE CRISTO 8960 26.5 29.9 89 26.4 26.2 101 SALT RIVER SUMMIT 7600 16.4 14.5 114 18.7 17.5 107 TRIAL LAKE 9960 21.2 25.4 84 22.4 24.5 92 ----- ----- Basin wide percent of average 97 103 ----------------------------------------------------------------------------- -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.