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: APRIL 16 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 23.7 15.7 151 28.4 24.2 118 COTTONWOOD CREEK 7600 25.5 23.2 111 29.5 27.0 110 GRANITE CREEK 6770 22.4 17.5 129 24.0 25.5 95 GRASSY LAKE 7265 43.5 37.7 116 42.4 40.2 106 GROS VENTRE SUMMIT 8775 -M 16.0 * -M 17.4 * LEWIS LAKE DIVIDE 7860 41.8 36.8 114 41.3 40.8 102 PHILLIPS BENCH 8200 34.3 30.9 112 33.7 32.3 105 SALT RIVER SUMMIT 7600 16.9 13.7 123 19.2 18.4 105 SNAKE RIVER STATION 6920 22.0 18.5 119 26.5 28.2 95 SPRING CREEK DIVIDE 9000 32.3 29.5 110 30.2 29.5 103 THUMB DIVIDE 7980 -M 17.4 * -M 22.5 * TOGWOTEE PASS 9580 -M 27.2 * 30.7 30.5 101 TWO OCEAN PLATEAU 9360 38.0 26.7 143 31.9 33.2 97 WILLOW CREEK 8450 35.0 31.9 111 39.9 34.7 116 ----- ----- Basin wide percent of average 119 104 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 27.2 25.7 106 24.2 19.9 123 BLACK BEAR 7950 51.3 40.3 128 -M 44.0 * CANYON 7940 19.2 13.5 143 20.2 15.5 132 FISHER CREEK 9100 41.3 38.0 109 38.0 39.8 96 MADISON PLATEAU 7750 -M 25.5 * 33.7 28.4 119 NORTHEAST ENTRANCE 7350 13.0 9.0 147 14.6 13.0 113 PARKER PEAK 9400 25.0 23.4 108 -M 17.0 * SYLVAN LAKE 8420 27.4 23.9 115 29.2 20.9 140 THUMB DIVIDE 7980 -M 17.4 * -M 22.5 * TWO OCEAN PLATEAU 9360 38.0 26.7 143 31.9 33.2 97 WHISKEY CREEK 6800 -M 18.2 * -M 23.7 * WHITE MILL 8700 28.9 25.9 112 25.7 30.7 84 WOLVERINE 7650 13.5 11.6 116 13.4 14.1 95 ----- ----- Basin wide percent of average 120 108 WIND RIVER BURROUGHS CREEK 8750 17.9 15.2 118 19.2 18.2 107 COLD SPRINGS 9630 -M 8.6 * 13.2 12.0 111 DEER PARK 9700 18.9 -M * 24.5 -M * HOBBS PARK 10100 19.5 16.7 118 18.2 15.9 116 LITTLE WARM 9620 16.0 13.5 120 17.4 15.0 117 SOUTH PASS 9040 20.0 17.7 113 21.4 18.9 114 ST. LAWRENCE ALT 8620 8.5 7.0 121 12.0 11.5 106 TOGWOTEE PASS 9580 -M 27.2 * 30.7 30.5 101 TOWNSEND CREEK 8700 11.6 10.5 112 15.2 14.1 108 ----- ----- Basin wide percent of average 117 109 BIGHORN BASIN BALD MTN. 9375 21.9 22.5 97 19.9 19.2 104 BEAR TRAP MEADOW 7900 3.7 6.8 53 11.0 9.5 116 BLACKWATER 9780 31.9 24.9 129 26.4 19.4 137 BONE SPRINGS DIV 9350 20.7 18.2 114 18.9 16.7 114 EVENING STAR 9200 34.8 29.4 119 35.8 24.4 147 GRAVE SPRINGS 8550 10.6 10.7 100 13.6 11.1 123 KIRWIN 9550 13.7 11.2 123 15.4 12.1 127 MARQUETTE 8760 10.7 8.7 123 11.4 11.6 98 MIDDLE POWDER 7760 16.7 13.7 122 19.7 13.5 148 OWL CREEK 8975 7.5 4.8 158 7.3 7.3 102 POWDER RIVER PASS 9480 12.6 11.6 109 16.7 13.2 126 SHELL CREEK 9580 17.9 16.4 110 16.4 14.6 113 SYLVAN LAKE 8420 27.4 23.9 115 29.2 20.9 140 SYLVAN ROAD 8120 -M 10.7 * -M 17.5 * TIMBER CREEK 7950 6.5 6.6 97 8.9 8.6 103 YOUNTS PEAK 8350 22.4 18.4 122 20.2 18.2 112 ----- ----- Basin wide percent of average 114 123 SHOSHONE RIVER BLACKWATER 9780 31.9 24.9 129 26.4 19.4 137 EVENING STAR 9200 34.8 29.4 119 35.8 24.4 147 KIRWIN 9550 13.7 11.2 123 15.4 12.1 127 MARQUETTE 8760 10.7 8.7 123 11.4 11.6 98 SYLVAN LAKE 8420 27.4 23.9 115 29.2 20.9 140 SYLVAN ROAD 8120 -M 10.7 * -M 17.5 * YOUNTS PEAK 8350 22.4 18.4 122 20.2 18.2 112 ----- ----- Basin wide percent of average 121 130 POWDER-TONGUE BEAR TRAP MEADOW 7900 3.7 6.8 53 11.0 9.5 116 BIG GOOSE 7990 9.7 -M * 13.4 -M * BONE SPRINGS DIV 9350 20.7 18.2 114 18.9 16.7 114 BURGESS JUNCTION 7880 11.9 13.0 91 13.4 13.0 103 CLOUD PEAK RESERVOIR 9860 19.5 16.9 116 17.4 15.4 114 DOME LAKE 8880 -M 15.0 * 13.5 15.0 91 GRAVE SPRINGS 8550 10.6 10.7 100 13.6 11.1 123 HANSEN SAWMILL 8760 5.1 7.6 68 10.1 9.2 110 MIDDLE POWDER 7760 16.7 13.7 122 19.7 13.5 148 POWDER RIVER PASS 9480 12.6 11.6 109 16.7 13.2 126 SUCKER CREEK 8880 13.5 13.5 101 16.2 15.0 109 TIE CREEK 6870 -M -M * -M 12.5 * ----- ----- Basin wide percent of average 102 115 BELLE FOURCHE BLIND PARK 6890 6.5 11.5 57 17.0 12.0 142 NORTH RAPID CREEK 6130 6.8 -M * 14.7 -M * WARREN PEAK 6520 12.5 11.5 108 11.2 9.2 122 ----- ----- Basin wide percent of average 83 134 UPPER N. PLATTE RIVER COLUMBINE 9400 18.4 24.4 76 23.4 26.4 89 DIVIDE PEAK 8800 22.2 21.7 103 26.9 25.2 107 ELK RIVER 8700 17.4 20.2 87 23.9 20.7 116 JOE WRIGHT 10120 21.4 24.4 89 27.9 27.7 101 NORTH FRENCH CREEK 10100 33.9 28.4 120 32.0 25.9 125 OLD BATTLE 10000 32.8 36.0 92 38.9 33.0 118 SOUTH BRUSH CREEK 8400 11.0 13.0 86 20.9 18.5 113 TOWER 10500 47.8 49.3 98 40.9 39.8 103 WEBBER SPRINGS 9200 20.9 28.5 73 28.9 28.0 103 WILLOW CREEK PASS 9540 13.1 13.5 98 12.7 14.1 91 ----- ----- Basin wide percent of average 93 107 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 15.5 29.0 54 24.2 21.7 112 CASPER MTN. 7900 15.2 19.0 81 19.9 16.5 121 DEADMAN HILL 10220 17.5 17.9 98 18.4 19.0 97 DEER PARK 9700 18.9 -M * 24.5 -M * LAPRELE CREEK 8320 -M 9.9 * 17.0 13.4 128 RENO HILL 8400 17.7 15.5 115 22.0 20.9 106 ROACH 9700 17.5 18.2 97 22.4 23.5 95 SAND LAKE 10080 39.5 35.8 111 31.9 22.7 141 SOUTH PASS 9040 20.0 17.7 113 21.4 18.9 114 WINDY PEAK 7840 7.6 9.4 82 14.5 11.0 134 ----- ----- Basin wide percent of average 93 115 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 12.4 10.6 117 19.2 17.0 113 DIVIDE PEAK 8800 22.2 21.7 103 26.9 25.2 107 OLD BATTLE 10000 32.8 36.0 92 38.9 33.0 118 SANDSTONE RS 8150 14.6 15.0 98 22.2 20.9 107 WHISKEY PARK 8950 29.0 30.7 95 31.9 31.2 103 ----- ----- Basin wide percent of average 98 110 UPPER GREEN RIVER BIG SANDY OPENING 9100 17.0 15.5 111 16.2 17.7 92 BLIND BULL SUM 8650 30.7 30.5 101 23.4 25.9 91 EAST RIM DIVIDE 7930 14.6 15.0 98 14.9 16.5 90 ELKHART PARK G.S. 9400 15.2 15.0 102 15.7 17.4 91 GROS VENTRE SUMMIT 8775 -M 16.0 * -M 17.4 * KENDALL R.S. 7740 15.9 13.0 122 17.2 16.9 103 LOOMIS PARK 8240 -M 16.9 * 21.2 20.4 104 NEW FORK LAKE 8340 13.7 10.6 130 12.6 15.7 81 SNIDER BASIN 8250 18.9 15.5 123 18.7 16.4 115 SPRING CREEK DIVIDE 9000 32.3 29.5 110 30.2 29.5 103 TRIPLE PEAK 8500 30.4 26.9 114 31.9 33.4 96 ----- ----- Basin wide percent of average 110 97 LOWER GREEN RIVER HAMS FORK 7840 14.0 5.8 240 12.5 14.5 86 HEWINTA 9500 13.0 8.9 147 15.5 14.9 105 HICKERSON PARK 9150 5.6 6.5 88 10.5 11.0 96 HOLE-IN-ROCK 9150 7.3 6.0 121 10.9 11.0 99 INDIAN CREEK 9425 31.9 30.4 105 26.9 28.0 96 KELLEY R.S. 8180 17.9 17.5 102 20.0 20.4 99 STEEL CREEK PARK 10100 16.2 18.0 91 17.9 14.5 124 ----- ----- Basin wide percent of average 114 100 UPPER BEAR RIVER BUG LAKE 7950 24.2 19.9 122 21.7 21.2 102 HAYDEN FORK 9400 15.4 10.6 145 21.7 21.2 103 KELLEY R.S. 8180 17.9 17.5 102 20.0 20.4 99 LILY LAKE 9050 13.0 12.7 102 19.2 16.5 116 MONTE CRISTO 8960 27.2 29.2 94 28.0 28.2 100 SALT RIVER SUMMIT 7600 16.9 13.7 123 19.2 18.4 105 TRIAL LAKE 9960 22.5 25.9 87 23.4 26.2 90 ----- ----- Basin wide percent of average 106 101 ----------------------------------------------------------------------------- -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.