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 23 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 21.2 13.5 158 28.9 24.7 118 COTTONWOOD CREEK 7600 24.4 21.7 112 30.4 27.7 110 GRANITE CREEK 6770 20.4 15.5 132 24.2 26.2 93 GRASSY LAKE 7265 42.8 35.9 120 44.7 40.9 110 GROS VENTRE SUMMIT 8775 -M 15.0 * -M 17.7 * LEWIS LAKE DIVIDE 7860 41.3 35.8 116 42.7 41.7 103 PHILLIPS BENCH 8200 35.2 30.2 117 34.0 32.9 104 SALT RIVER SUMMIT 7600 15.4 12.5 124 19.7 18.7 105 SNAKE RIVER STATION 6920 19.9 17.5 114 27.9 28.7 97 SPRING CREEK DIVIDE 9000 32.9 29.5 112 30.4 30.2 101 THUMB DIVIDE 7980 23.7 16.4 145 24.5 23.0 107 TOGWOTEE PASS 9580 -M 27.7 * 31.4 31.2 101 TWO OCEAN PLATEAU 9360 40.8 27.2 150 34.2 33.9 101 WILLOW CREEK 8450 32.8 31.9 103 40.9 35.4 116 ----- ----- Basin wide percent of average 122 105 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 28.7 25.9 111 25.7 20.5 126 BLACK BEAR 7950 -M 40.0 * 48.5 45.3 108 CANYON 7940 17.7 12.4 144 20.7 15.9 131 FISHER CREEK 9100 39.2 38.4 102 39.2 40.9 96 MADISON PLATEAU 7750 -M 24.9 * 34.3 29.2 118 NORTHEAST ENTRANCE 7350 10.5 7.5 141 15.0 13.5 112 PARKER PEAK 9400 -M 23.5 * -M 17.7 * SYLVAN LAKE 8420 -M 23.9 * -M 21.7 * THUMB DIVIDE 7980 23.7 16.4 145 24.5 23.0 107 TWO OCEAN PLATEAU 9360 40.8 27.2 150 34.2 33.9 101 WHISKEY CREEK 6800 21.9 16.7 132 26.2 24.2 108 WHITE MILL 8700 29.4 26.2 113 26.4 31.7 84 WOLVERINE 7650 12.5 10.0 125 14.0 14.6 96 ----- ----- Basin wide percent of average 125 106 WIND RIVER BURROUGHS CREEK 8750 17.9 14.2 127 19.7 18.7 105 COLD SPRINGS 9630 -M 7.8 * -M 12.5 * DEER PARK 9700 21.0 -M * -M -M * HOBBS PARK 10100 -M 17.4 * -M 16.5 * LITTLE WARM 9620 -M 12.0 * -M 15.6 * SOUTH PASS 9040 -M 17.9 * -M 19.7 * ST. LAWRENCE ALT 8620 -M 6.3 * -M 12.0 * TOGWOTEE PASS 9580 -M 27.7 * 31.4 31.2 101 TOWNSEND CREEK 8700 -M 10.0 * -M 14.9 * ----- ----- Basin wide percent of average 127* 103* BIGHORN BASIN BALD MTN. 9375 22.7 23.4 98 20.9 19.9 106 BEAR TRAP MEADOW 7900 -M 5.6 * 12.5 10.0 125 BLACKWATER 9780 33.8 25.2 134 27.4 20.0 137 BONE SPRINGS DIV 9350 20.9 18.4 114 20.2 17.4 117 EVENING STAR 9200 35.5 30.0 119 37.7 25.2 150 GRAVE SPRINGS 8550 11.4 11.1 102 14.9 11.7 127 KIRWIN 9550 15.0 11.5 130 16.7 12.7 132 MARQUETTE 8760 -M 8.7 * -M 12.5 * MIDDLE POWDER 7760 18.2 14.4 127 20.7 14.1 147 OWL CREEK 8975 8.0 4.1 196 9.0 7.6 118 POWDER RIVER PASS 9480 13.5 11.1 122 17.7 14.0 128 SHELL CREEK 9580 -M 16.7 * -M 15.2 * SYLVAN LAKE 8420 -M 23.9 * -M 21.7 * SYLVAN ROAD 8120 -M 9.5 * -M 18.0 * TIMBER CREEK 7950 -M 6.3 * -M 9.4 * YOUNTS PEAK 8350 22.4 18.4 122 20.7 18.7 111 ----- ----- Basin wide percent of average 121 128 SHOSHONE RIVER BLACKWATER 9780 33.8 25.2 134 27.4 20.0 137 EVENING STAR 9200 35.5 30.0 119 37.7 25.2 150 KIRWIN 9550 15.0 11.5 130 16.7 12.7 132 MARQUETTE 8760 -M 8.7 * -M 12.5 * SYLVAN LAKE 8420 -M 23.9 * -M 21.7 * SYLVAN ROAD 8120 -M 9.5 * -M 18.0 * YOUNTS PEAK 8350 22.4 18.4 122 20.7 18.7 111 ----- ----- Basin wide percent of average 126 134 POWDER-TONGUE BEAR TRAP MEADOW 7900 -M 5.6 * 12.5 10.0 125 BIG GOOSE 7990 11.0 -M * 15.4 -M * BONE SPRINGS DIV 9350 20.9 18.4 114 20.2 17.4 117 BURGESS JUNCTION 7880 12.6 13.4 95 14.9 13.7 109 CLOUD PEAK RESERVOIR 9860 21.2 17.4 123 19.7 16.2 123 DOME LAKE 8880 -M 15.0 * 15.2 15.6 98 GRAVE SPRINGS 8550 11.4 11.1 102 14.9 11.7 127 HANSEN SAWMILL 8760 -M 7.3 * 12.5 9.7 129 MIDDLE POWDER 7760 18.2 14.4 127 20.7 14.1 147 POWDER RIVER PASS 9480 13.5 11.1 122 17.7 14.0 128 SUCKER CREEK 8880 14.5 13.6 107 17.9 15.6 115 TIE CREEK 6870 -M -M * -M 13.1 * ----- ----- Basin wide percent of average 114 121 BELLE FOURCHE BLIND PARK 6890 3.9 10.6 37 17.7 12.9 139 NORTH RAPID CREEK 6130 5.0 -M * 16.0 -M * WARREN PEAK 6520 11.0 10.6 103 12.7 9.7 131 ----- ----- Basin wide percent of average 70 136 UPPER N. PLATTE RIVER COLUMBINE 9400 18.0 23.4 78 25.7 27.2 95 DIVIDE PEAK 8800 21.9 20.7 107 28.2 26.2 108 ELK RIVER 8700 15.9 18.4 86 25.4 21.4 119 JOE WRIGHT 10120 22.9 24.5 94 29.4 28.9 102 NORTH FRENCH CREEK 10100 35.8 28.9 124 34.3 26.9 128 OLD BATTLE 10000 34.5 37.0 94 40.8 34.3 119 SOUTH BRUSH CREEK 8400 10.2 12.0 86 21.7 19.5 111 TOWER 10500 51.7 50.2 103 43.8 41.4 106 WEBBER SPRINGS 9200 21.5 27.4 79 30.0 29.2 103 WILLOW CREEK PASS 9540 14.2 13.5 106 13.9 14.7 94 ----- ----- Basin wide percent of average 97 109 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 -M 29.0 * 27.4 22.7 121 CASPER MTN. 7900 15.4 18.5 83 20.7 17.7 118 DEADMAN HILL 10220 19.7 18.5 106 20.7 20.0 104 DEER PARK 9700 21.0 -M * -M -M * LAPRELE CREEK 8320 -M 8.2 * 18.2 14.0 130 RENO HILL 8400 17.7 14.5 123 23.2 21.7 107 ROACH 9700 18.9 18.2 104 23.9 24.7 98 SAND LAKE 10080 42.7 36.5 117 33.8 23.7 143 SOUTH PASS 9040 -M 17.9 * -M 19.7 * WINDY PEAK 7840 7.8 8.7 89 15.5 11.5 135 ----- ----- Basin wide percent of average 106 118 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 8.1 8.0 103 20.0 17.7 113 DIVIDE PEAK 8800 21.9 20.7 107 28.2 26.2 108 OLD BATTLE 10000 34.5 37.0 94 40.8 34.3 119 SANDSTONE RS 8150 11.2 12.6 89 23.0 21.9 106 WHISKEY PARK 8950 29.7 30.2 99 33.2 32.5 102 ----- ----- Basin wide percent of average 98 110 UPPER GREEN RIVER BIG SANDY OPENING 9100 16.4 14.7 111 16.7 18.0 93 BLIND BULL SUM 8650 30.2 26.9 112 23.7 26.4 91 EAST RIM DIVIDE 7930 14.5 15.0 97 15.1 16.9 90 ELKHART PARK G.S. 9400 14.7 14.5 102 16.2 17.7 91 GROS VENTRE SUMMIT 8775 -M 15.0 * -M 17.7 * KENDALL R.S. 7740 14.4 12.0 121 17.7 17.2 103 LOOMIS PARK 8240 -M 16.0 * 21.5 20.9 103 NEW FORK LAKE 8340 12.5 10.0 125 13.0 16.0 82 SNIDER BASIN 8250 18.4 14.4 128 19.2 16.9 115 SPRING CREEK DIVIDE 9000 32.9 29.5 112 30.4 30.2 101 TRIPLE PEAK 8500 29.0 26.0 112 32.4 34.3 95 ----- ----- Basin wide percent of average 113 97 LOWER GREEN RIVER HAMS FORK 7840 12.0 5.8 207 13.6 15.0 92 HEWINTA 9500 11.0 7.3 152 16.2 15.5 104 HICKERSON PARK 9150 5.3 4.8 109 11.6 11.6 100 HOLE-IN-ROCK 9150 7.8 4.3 182 12.0 11.6 104 INDIAN CREEK 9425 33.3 29.7 112 28.2 28.7 99 KELLEY R.S. 8180 16.7 16.4 102 20.9 20.9 100 STEEL CREEK PARK 10100 16.9 18.4 92 18.9 15.4 123 ----- ----- Basin wide percent of average 119 103 UPPER BEAR RIVER BUG LAKE 7950 23.0 18.0 128 23.2 21.9 106 HAYDEN FORK 9400 12.0 8.9 137 22.4 22.0 102 KELLEY R.S. 8180 16.7 16.4 102 20.9 20.9 100 LILY LAKE 9050 12.0 11.0 110 19.9 17.2 116 MONTE CRISTO 8960 29.2 27.9 105 29.7 29.2 102 SALT RIVER SUMMIT 7600 15.4 12.5 124 19.7 18.7 105 TRIAL LAKE 9960 20.9 25.0 84 24.2 27.2 89 ----- ----- Basin wide percent of average 108 102 ----------------------------------------------------------------------------- -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.