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 THURSDAY: APRIL 15 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 23.5 16.2 146 28.4 24.0 119 COTTONWOOD CREEK 7600 25.7 23.4 110 29.4 26.9 110 GRANITE CREEK 6770 22.2 17.9 125 24.0 25.4 95 GRASSY LAKE 7265 43.4 37.9 115 42.4 39.9 107 GROS VENTRE SUMMIT 8775 17.0 16.0 107 16.9 17.2 98 LEWIS LAKE DIVIDE 7860 41.7 36.9 113 41.3 40.7 102 PHILLIPS BENCH 8200 34.4 31.0 111 33.7 32.2 105 SALT RIVER SUMMIT 7600 16.7 14.0 120 19.4 18.2 107 SNAKE RIVER STATION 6920 21.9 18.7 117 26.5 28.0 95 SPRING CREEK DIVIDE 9000 32.3 29.5 110 30.0 29.4 103 THUMB DIVIDE 7980 -M 17.4 * -M 22.4 * TOGWOTEE PASS 9580 -M 27.2 * 30.7 30.4 101 TWO OCEAN PLATEAU 9360 38.0 26.7 143 31.9 33.0 97 WILLOW CREEK 8450 35.3 31.9 112 39.9 34.5 116 ----- ----- Basin wide percent of average 118 104 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 27.0 25.7 106 24.2 19.7 123 BLACK BEAR 7950 50.8 40.3 127 -M 43.8 * CANYON 7940 19.2 13.6 141 20.2 15.4 133 FISHER CREEK 9100 41.3 38.0 109 37.9 39.5 96 MADISON PLATEAU 7750 -M 25.7 * 33.7 28.2 120 NORTHEAST ENTRANCE 7350 13.0 9.0 145 14.5 13.0 113 PARKER PEAK 9400 25.0 23.4 108 -M 16.9 * SYLVAN LAKE 8420 27.4 24.0 114 29.2 20.9 141 THUMB DIVIDE 7980 -M 17.4 * -M 22.4 * TWO OCEAN PLATEAU 9360 38.0 26.7 143 31.9 33.0 97 WHISKEY CREEK 6800 22.2 18.4 121 25.5 23.5 109 WHITE MILL 8700 28.9 25.9 112 25.7 30.7 84 WOLVERINE 7650 13.6 12.0 115 13.2 14.0 95 ----- ----- Basin wide percent of average 120 108 WIND RIVER BURROUGHS CREEK 8750 17.9 15.5 116 19.2 18.0 107 COLD SPRINGS 9630 10.0 8.7 114 13.2 11.9 112 DEER PARK 9700 18.7 -M * 24.4 -M * HOBBS PARK 10100 19.5 16.7 118 18.0 15.7 115 LITTLE WARM 9620 15.9 13.6 117 17.4 14.9 118 SOUTH PASS 9040 19.9 17.7 113 21.4 18.9 114 ST. LAWRENCE ALT 8620 8.0 7.3 112 12.0 11.4 106 TOGWOTEE PASS 9580 -M 27.2 * 30.7 30.4 101 TOWNSEND CREEK 8700 11.6 10.5 111 15.5 14.0 111 ----- ----- Basin wide percent of average 115 110 BIGHORN BASIN BALD MTN. 9375 21.4 22.4 96 19.4 19.0 102 BEAR TRAP MEADOW 7900 3.5 7.0 50 11.0 9.5 116 BLACKWATER 9780 31.9 24.9 129 26.2 19.4 136 BONE SPRINGS DIV 9350 20.2 18.2 111 18.4 16.7 111 EVENING STAR 9200 34.7 29.4 119 35.8 24.2 148 GRAVE SPRINGS 8550 10.5 10.7 99 13.5 11.0 123 KIRWIN 9550 13.7 11.2 123 15.2 12.0 127 MARQUETTE 8760 10.5 8.9 120 11.1 11.5 98 MIDDLE POWDER 7760 16.7 13.7 122 19.7 13.4 149 OWL CREEK 8975 7.1 4.8 148 7.3 7.1 103 POWDER RIVER PASS 9480 12.5 11.7 106 16.4 13.0 127 SHELL CREEK 9580 17.7 16.4 109 16.2 14.5 112 SYLVAN LAKE 8420 27.4 24.0 114 29.2 20.9 141 SYLVAN ROAD 8120 17.7 11.0 163 20.4 17.4 117 TIMBER CREEK 7950 6.5 6.8 96 8.9 8.5 104 YOUNTS PEAK 8350 22.4 18.4 122 20.0 18.0 112 ----- ----- Basin wide percent of average 115 123 SHOSHONE RIVER BLACKWATER 9780 31.9 24.9 129 26.2 19.4 136 EVENING STAR 9200 34.7 29.4 119 35.8 24.2 148 KIRWIN 9550 13.7 11.2 123 15.2 12.0 127 MARQUETTE 8760 10.5 8.9 120 11.1 11.5 98 SYLVAN LAKE 8420 27.4 24.0 114 29.2 20.9 141 SYLVAN ROAD 8120 17.7 11.0 163 20.4 17.4 117 YOUNTS PEAK 8350 22.4 18.4 122 20.0 18.0 112 ----- ----- Basin wide percent of average 124 129 POWDER-TONGUE BEAR TRAP MEADOW 7900 3.5 7.0 50 11.0 9.5 116 BIG GOOSE 7990 9.5 -M * 13.0 -M * BONE SPRINGS DIV 9350 20.2 18.2 111 18.4 16.7 111 BURGESS JUNCTION 7880 11.5 13.0 89 13.0 13.0 101 CLOUD PEAK RESERVOIR 9860 19.0 16.9 113 16.9 15.1 112 DOME LAKE 8880 -M 15.0 * 13.2 14.7 90 GRAVE SPRINGS 8550 10.5 10.7 99 13.5 11.0 123 HANSEN SAWMILL 8760 5.0 7.8 64 10.0 9.1 110 MIDDLE POWDER 7760 16.7 13.7 122 19.7 13.4 149 POWDER RIVER PASS 9480 12.5 11.7 106 16.4 13.0 127 SUCKER CREEK 8880 13.0 13.5 98 15.6 14.7 107 TIE CREEK 6870 -M -M * -M 12.5 * ----- ----- Basin wide percent of average 100 114 BELLE FOURCHE BLIND PARK 6890 6.3 11.7 54 16.9 11.9 143 NORTH RAPID CREEK 6130 6.5 -M * 14.6 -M * WARREN PEAK 6520 12.2 11.7 105 11.4 9.1 125 ----- ----- Basin wide percent of average 80 135 UPPER N. PLATTE RIVER COLUMBINE 9400 18.4 24.5 75 23.4 26.2 89 DIVIDE PEAK 8800 22.2 21.9 102 26.9 25.0 108 ELK RIVER 8700 17.0 20.4 84 23.7 20.7 116 JOE WRIGHT 10120 21.2 24.4 88 27.9 27.5 102 NORTH FRENCH CREEK 10100 33.8 28.4 120 32.0 25.7 125 OLD BATTLE 10000 32.7 35.9 91 38.9 32.8 119 SOUTH BRUSH CREEK 8400 11.2 13.1 86 20.7 18.4 113 TOWER 10500 47.4 49.2 97 40.9 39.5 104 WEBBER SPRINGS 9200 20.7 28.7 73 28.7 27.9 104 WILLOW CREEK PASS 9540 13.0 13.6 96 12.6 14.0 91 ----- ----- Basin wide percent of average 92 107 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 15.2 29.2 53 24.2 21.5 113 CASPER MTN. 7900 15.2 19.2 80 19.9 16.4 122 DEADMAN HILL 10220 17.0 17.9 95 18.4 18.9 98 DEER PARK 9700 18.7 -M * 24.4 -M * LAPRELE CREEK 8320 -M 10.1 * 16.7 13.2 127 RENO HILL 8400 17.4 15.6 112 21.9 20.7 106 ROACH 9700 17.5 18.2 97 22.2 23.4 95 SAND LAKE 10080 39.0 35.8 109 31.4 22.5 140 SOUTH PASS 9040 19.9 17.7 113 21.4 18.9 114 WINDY PEAK 7840 7.5 9.5 80 14.5 10.9 134 ----- ----- Basin wide percent of average 92 115 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 12.0 11.0 109 19.0 16.9 114 DIVIDE PEAK 8800 22.2 21.9 102 26.9 25.0 108 OLD BATTLE 10000 32.7 35.9 91 38.9 32.8 119 SANDSTONE RS 8150 13.9 15.5 90 22.2 20.7 108 WHISKEY PARK 8950 29.0 30.9 95 31.9 31.0 103 ----- ----- Basin wide percent of average 96 110 UPPER GREEN RIVER BIG SANDY OPENING 9100 16.7 15.5 108 16.2 17.5 93 BLIND BULL SUM 8650 28.4 31.2 92 23.4 25.7 91 EAST RIM DIVIDE 7930 14.7 15.1 98 14.9 16.4 91 ELKHART PARK G.S. 9400 15.2 15.1 101 15.7 17.2 92 GROS VENTRE SUMMIT 8775 17.0 16.0 107 16.9 17.2 98 KENDALL R.S. 7740 16.0 13.2 121 17.4 16.7 104 LOOMIS PARK 8240 -M 17.0 * 21.2 20.4 105 NEW FORK LAKE 8340 13.6 10.9 126 12.6 15.6 81 SNIDER BASIN 8250 18.7 15.6 120 18.7 16.4 115 SPRING CREEK DIVIDE 9000 32.3 29.5 110 30.0 29.4 103 TRIPLE PEAK 8500 30.4 27.0 113 31.9 33.3 96 ----- ----- Basin wide percent of average 108 97 LOWER GREEN RIVER HAMS FORK 7840 14.0 5.8 242 12.5 14.5 86 HEWINTA 9500 12.6 9.1 139 15.5 14.6 106 HICKERSON PARK 9150 5.8 6.8 87 10.5 11.0 97 HOLE-IN-ROCK 9150 7.1 6.3 113 11.0 11.0 100 INDIAN CREEK 9425 32.0 30.5 105 26.9 27.9 97 KELLEY R.S. 8180 17.7 17.7 100 20.0 20.2 100 STEEL CREEK PARK 10100 16.0 18.0 89 17.9 14.5 125 ----- ----- Basin wide percent of average 112 101 UPPER BEAR RIVER BUG LAKE 7950 24.0 20.2 120 21.7 21.2 103 HAYDEN FORK 9400 15.0 11.0 137 21.9 21.0 104 KELLEY R.S. 8180 17.7 17.7 100 20.0 20.2 100 LILY LAKE 9050 12.7 13.0 98 19.2 16.4 118 MONTE CRISTO 8960 27.2 29.4 93 28.0 27.9 101 SALT RIVER SUMMIT 7600 16.7 14.0 120 19.4 18.2 107 TRIAL LAKE 9960 22.4 26.2 86 23.4 26.2 90 ----- ----- Basin wide percent of average 104 102 ----------------------------------------------------------------------------- -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.