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 18 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 22.4 15.1 149 28.4 24.2 118 COTTONWOOD CREEK 7600 25.4 22.7 112 29.4 27.2 109 GRANITE CREEK 6770 -M 16.9 * -M 25.7 * GRASSY LAKE 7265 43.7 37.2 118 42.5 40.3 106 GROS VENTRE SUMMIT 8775 -M 15.7 * -M 17.4 * LEWIS LAKE DIVIDE 7860 41.3 36.4 114 41.3 41.0 101 PHILLIPS BENCH 8200 34.7 30.7 113 33.7 32.4 104 SALT RIVER SUMMIT 7600 16.2 13.4 122 19.4 18.4 106 SNAKE RIVER STATION 6920 21.0 18.2 116 26.5 28.4 94 SPRING CREEK DIVIDE 9000 32.3 29.5 110 30.2 29.7 102 THUMB DIVIDE 7980 -M 17.0 * -M 22.7 * TOGWOTEE PASS 9580 -M 27.4 * 30.7 30.7 100 TWO OCEAN PLATEAU 9360 38.3 26.9 143 32.0 33.3 97 WILLOW CREEK 8450 34.9 31.9 110 39.9 34.8 115 ----- ----- Basin wide percent of average 119 104 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 27.2 25.7 107 24.4 20.0 122 BLACK BEAR 7950 48.7 40.3 121 -M 44.3 * CANYON 7940 18.4 13.1 141 20.2 15.5 131 FISHER CREEK 9100 41.3 38.2 109 38.3 40.0 96 MADISON PLATEAU 7750 -M 25.4 * 33.7 28.7 118 NORTHEAST ENTRANCE 7350 11.7 8.5 138 14.6 13.1 112 PARKER PEAK 9400 24.9 23.4 107 -M 17.2 * SYLVAN LAKE 8420 -M 23.9 * -M 21.2 * THUMB DIVIDE 7980 -M 17.0 * -M 22.7 * TWO OCEAN PLATEAU 9360 38.3 26.9 143 32.0 33.3 97 WHISKEY CREEK 6800 -M 17.7 * -M 23.9 * WHITE MILL 8700 -M 25.9 * -M 31.0 * WOLVERINE 7650 13.0 11.2 117 13.5 14.2 95 ----- ----- Basin wide percent of average 120 108 WIND RIVER BURROUGHS CREEK 8750 -M 15.0 * -M 18.4 * COLD SPRINGS 9630 9.4 8.5 111 13.5 12.1 112 DEER PARK 9700 18.5 -M * 24.5 -M * HOBBS PARK 10100 19.7 16.9 117 18.2 16.0 114 LITTLE WARM 9620 -M 13.0 * -M 15.1 * SOUTH PASS 9040 19.9 17.7 112 21.5 19.2 113 ST. LAWRENCE ALT 8620 7.8 6.8 114 12.0 11.6 103 TOGWOTEE PASS 9580 -M 27.4 * 30.7 30.7 100 TOWNSEND CREEK 8700 11.6 10.4 113 15.6 14.4 110 ----- ----- Basin wide percent of average 114 108 BIGHORN BASIN BALD MTN. 9375 21.9 22.7 97 20.2 19.4 104 BEAR TRAP MEADOW 7900 3.2 6.5 49 11.0 9.6 114 BLACKWATER 9780 32.3 24.9 130 26.4 19.7 135 BONE SPRINGS DIV 9350 20.9 18.2 115 19.2 16.9 114 EVENING STAR 9200 34.4 29.5 117 35.8 24.7 146 GRAVE SPRINGS 8550 10.5 10.9 98 13.6 11.2 122 KIRWIN 9550 14.0 11.4 124 15.5 12.4 126 MARQUETTE 8760 11.0 8.7 126 11.9 11.9 100 MIDDLE POWDER 7760 16.9 14.0 121 19.7 13.6 145 OWL CREEK 8975 7.3 4.5 161 8.0 7.3 109 POWDER RIVER PASS 9480 12.7 11.5 112 16.7 13.5 124 SHELL CREEK 9580 18.0 16.4 110 16.7 14.7 114 SYLVAN LAKE 8420 -M 23.9 * -M 21.2 * SYLVAN ROAD 8120 -M 10.4 * -M 17.7 * TIMBER CREEK 7950 6.3 6.5 96 8.7 8.9 99 YOUNTS PEAK 8350 22.4 18.4 122 20.2 18.2 111 ----- ----- Basin wide percent of average 114 121 SHOSHONE RIVER BLACKWATER 9780 32.3 24.9 130 26.4 19.7 135 EVENING STAR 9200 34.4 29.5 117 35.8 24.7 146 KIRWIN 9550 14.0 11.4 124 15.5 12.4 126 MARQUETTE 8760 11.0 8.7 126 11.9 11.9 100 SYLVAN LAKE 8420 -M 23.9 * -M 21.2 * SYLVAN ROAD 8120 -M 10.4 * -M 17.7 * YOUNTS PEAK 8350 22.4 18.4 122 20.2 18.2 111 ----- ----- Basin wide percent of average 123 127 POWDER-TONGUE BEAR TRAP MEADOW 7900 3.2 6.5 49 11.0 9.6 114 BIG GOOSE 7990 9.6 -M * 13.6 -M * BONE SPRINGS DIV 9350 20.9 18.2 115 19.2 16.9 114 BURGESS JUNCTION 7880 12.0 13.1 91 13.5 13.2 102 CLOUD PEAK RESERVOIR 9860 19.9 17.0 117 18.2 15.5 117 DOME LAKE 8880 -M 15.0 * 13.6 15.1 91 GRAVE SPRINGS 8550 10.5 10.9 98 13.6 11.2 122 HANSEN SAWMILL 8760 5.0 7.5 67 10.1 9.4 109 MIDDLE POWDER 7760 16.9 14.0 121 19.7 13.6 145 POWDER RIVER PASS 9480 12.7 11.5 112 16.7 13.5 124 SUCKER CREEK 8880 13.5 13.5 101 16.5 15.1 110 TIE CREEK 6870 -M -M * -M 12.6 * ----- ----- Basin wide percent of average 103 115 BELLE FOURCHE BLIND PARK 6890 6.6 11.4 59 17.2 12.2 141 NORTH RAPID CREEK 6130 6.6 -M * 14.9 -M * WARREN PEAK 6520 12.5 11.4 111 11.5 9.5 123 ----- ----- Basin wide percent of average 85 133 UPPER N. PLATTE RIVER COLUMBINE 9400 18.7 24.0 78 23.9 26.7 90 DIVIDE PEAK 8800 22.4 21.4 105 27.2 25.4 108 ELK RIVER 8700 17.0 19.7 87 24.2 20.9 116 JOE WRIGHT 10120 22.2 24.4 91 28.5 28.2 102 NORTH FRENCH CREEK 10100 34.3 28.5 121 32.5 26.2 125 OLD BATTLE 10000 33.0 36.3 91 39.3 33.4 118 SOUTH BRUSH CREEK 8400 10.5 12.6 83 21.2 18.9 113 TOWER 10500 48.3 49.4 98 41.0 40.3 102 WEBBER SPRINGS 9200 20.9 28.2 74 29.0 28.4 103 WILLOW CREEK PASS 9540 13.4 13.5 99 13.0 14.2 92 ----- ----- Basin wide percent of average 94 107 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 16.0 29.0 56 24.5 21.9 112 CASPER MTN. 7900 15.2 18.9 81 19.9 16.9 119 DEADMAN HILL 10220 18.2 18.2 101 19.0 19.2 99 DEER PARK 9700 18.5 -M * 24.5 -M * LAPRELE CREEK 8320 -M 9.5 * 17.4 13.5 129 RENO HILL 8400 17.9 15.2 118 22.9 21.2 109 ROACH 9700 17.4 18.2 96 22.7 23.9 95 SAND LAKE 10080 40.2 36.0 112 32.0 22.9 140 SOUTH PASS 9040 19.9 17.7 112 21.5 19.2 113 WINDY PEAK 7840 7.5 9.1 83 15.1 11.1 137 ----- ----- Basin wide percent of average 94 115 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 11.6 9.9 119 19.2 17.2 112 DIVIDE PEAK 8800 22.4 21.4 105 27.2 25.4 108 OLD BATTLE 10000 33.0 36.3 91 39.3 33.4 118 SANDSTONE RS 8150 14.1 14.4 99 22.4 21.2 106 WHISKEY PARK 8950 29.4 30.5 97 32.3 31.5 103 ----- ----- Basin wide percent of average 99 109 UPPER GREEN RIVER BIG SANDY OPENING 9100 -M 15.2 * -M 17.7 * BLIND BULL SUM 8650 31.0 29.5 106 23.4 26.0 90 EAST RIM DIVIDE 7930 14.5 15.0 97 15.0 16.7 90 ELKHART PARK G.S. 9400 15.0 15.0 100 15.9 17.4 91 GROS VENTRE SUMMIT 8775 -M 15.7 * -M 17.4 * KENDALL R.S. 7740 15.5 12.7 122 17.4 16.9 103 LOOMIS PARK 8240 -M 16.7 * 21.2 20.5 104 NEW FORK LAKE 8340 13.1 10.5 125 13.0 15.9 82 SNIDER BASIN 8250 -M 15.1 * -M 16.5 * SPRING CREEK DIVIDE 9000 32.3 29.5 110 30.2 29.7 102 TRIPLE PEAK 8500 28.5 26.7 108 31.9 33.7 95 ----- ----- Basin wide percent of average 108 95 LOWER GREEN RIVER HAMS FORK 7840 12.9 5.8 221 12.5 14.6 85 HEWINTA 9500 12.1 8.5 145 15.5 15.0 103 HICKERSON PARK 9150 4.8 6.0 79 10.5 11.1 95 HOLE-IN-ROCK 9150 7.0 5.5 126 11.0 11.1 100 INDIAN CREEK 9425 32.5 30.2 108 27.0 28.2 97 KELLEY R.S. 8180 16.9 17.2 99 19.9 20.4 98 STEEL CREEK PARK 10100 16.0 18.2 89 18.0 14.7 123 ----- ----- Basin wide percent of average 112 100 UPPER BEAR RIVER BUG LAKE 7950 23.7 19.4 123 21.9 21.4 102 HAYDEN FORK 9400 13.9 10.1 137 22.2 21.4 104 KELLEY R.S. 8180 16.9 17.2 99 19.9 20.4 98 LILY LAKE 9050 12.4 12.2 101 19.0 16.7 114 MONTE CRISTO 8960 27.9 28.9 97 28.2 28.4 99 SALT RIVER SUMMIT 7600 16.2 13.4 122 19.4 18.4 106 TRIAL LAKE 9960 21.5 25.7 84 23.4 26.5 88 ----- ----- Basin wide percent of average 105 101 ----------------------------------------------------------------------------- -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.