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 TUESDAY: APRIL 13 , 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 16.4 147 28.4 23.9 120 COTTONWOOD CREEK 7600 26.2 23.5 112 29.4 26.9 110 GRANITE CREEK 6770 22.4 18.0 124 23.7 25.2 95 GRASSY LAKE 7265 44.2 37.7 118 42.5 39.8 108 GROS VENTRE SUMMIT 8775 16.7 16.0 105 16.7 17.2 98 LEWIS LAKE DIVIDE 7860 41.8 36.8 114 41.3 40.3 103 PHILLIPS BENCH 8200 34.3 30.7 112 33.4 31.9 105 SALT RIVER SUMMIT 7600 16.9 14.0 121 19.4 18.2 108 SNAKE RIVER STATION 6920 22.4 18.7 120 26.5 27.9 96 SPRING CREEK DIVIDE 9000 32.3 29.4 111 29.7 29.2 102 THUMB DIVIDE 7980 -M 17.4 * -M 22.4 * TOGWOTEE PASS 9580 -M 26.9 * 30.7 30.2 102 TWO OCEAN PLATEAU 9360 38.0 26.7 143 31.9 32.8 98 WILLOW CREEK 8450 36.3 31.7 115 39.8 34.3 117 ----- ----- Basin wide percent of average 119 105 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 27.2 25.4 108 24.4 19.5 125 BLACK BEAR 7950 51.3 40.0 129 -M 43.4 * CANYON 7940 18.9 13.5 140 20.2 15.2 133 FISHER CREEK 9100 41.3 37.8 110 38.0 39.3 97 MADISON PLATEAU 7750 -M 25.5 * 33.7 28.0 121 NORTHEAST ENTRANCE 7350 12.7 9.1 140 14.6 12.9 115 PARKER PEAK 9400 25.2 23.0 110 -M 16.9 * SYLVAN LAKE 8420 27.5 23.7 117 29.2 20.7 142 THUMB DIVIDE 7980 -M 17.4 * -M 22.4 * TWO OCEAN PLATEAU 9360 38.0 26.7 143 31.9 32.8 98 WHISKEY CREEK 6800 22.2 18.2 122 25.5 23.4 110 WHITE MILL 8700 28.9 25.9 112 25.7 30.4 85 WOLVERINE 7650 13.0 11.9 111 13.5 13.9 98 ----- ----- Basin wide percent of average 120 109 WIND RIVER BURROUGHS CREEK 8750 -M 15.4 * -M 17.9 * COLD SPRINGS 9630 9.6 8.7 111 13.4 11.7 114 DEER PARK 9700 18.4 -M * 23.9 -M * HOBBS PARK 10100 19.4 16.4 118 17.9 15.5 116 LITTLE WARM 9620 15.9 13.4 119 17.4 14.6 120 SOUTH PASS 9040 19.5 17.5 112 20.9 18.7 113 ST. LAWRENCE ALT 8620 7.5 7.3 105 11.5 11.2 103 TOGWOTEE PASS 9580 -M 26.9 * 30.7 30.2 102 TOWNSEND CREEK 8700 11.2 10.5 108 14.9 13.9 108 ----- ----- Basin wide percent of average 113 110 BIGHORN BASIN BALD MTN. 9375 21.2 22.2 96 19.4 18.9 104 BEAR TRAP MEADOW 7900 3.7 7.0 52 10.5 9.2 114 BLACKWATER 9780 32.2 24.4 132 26.4 19.2 138 BONE SPRINGS DIV 9350 19.7 17.9 110 18.2 16.4 111 EVENING STAR 9200 34.7 29.0 120 35.8 24.0 150 GRAVE SPRINGS 8550 10.2 10.5 98 13.2 10.9 123 KIRWIN 9550 14.0 11.0 127 15.2 12.0 128 MARQUETTE 8760 10.0 8.7 114 10.9 11.2 97 MIDDLE POWDER 7760 15.6 13.5 116 18.9 13.1 145 OWL CREEK 8975 7.3 4.8 156 7.5 7.0 106 POWDER RIVER PASS 9480 12.2 11.5 107 15.7 12.9 123 SHELL CREEK 9580 17.9 16.2 111 16.2 14.4 114 SYLVAN LAKE 8420 27.5 23.7 117 29.2 20.7 142 SYLVAN ROAD 8120 -M 11.1 * -M 17.2 * TIMBER CREEK 7950 6.0 6.6 90 8.0 8.4 96 YOUNTS PEAK 8350 22.4 18.2 123 20.0 17.9 113 ----- ----- Basin wide percent of average 113 123 SHOSHONE RIVER BLACKWATER 9780 32.2 24.4 132 26.4 19.2 138 EVENING STAR 9200 34.7 29.0 120 35.8 24.0 150 KIRWIN 9550 14.0 11.0 127 15.2 12.0 128 MARQUETTE 8760 10.0 8.7 114 10.9 11.2 97 SYLVAN LAKE 8420 27.5 23.7 117 29.2 20.7 142 SYLVAN ROAD 8120 -M 11.1 * -M 17.2 * YOUNTS PEAK 8350 22.4 18.2 123 20.0 17.9 113 ----- ----- Basin wide percent of average 123 132 POWDER-TONGUE BEAR TRAP MEADOW 7900 3.7 7.0 52 10.5 9.2 114 BIG GOOSE 7990 8.5 -M * 12.4 -M * BONE SPRINGS DIV 9350 19.7 17.9 110 18.2 16.4 111 BURGESS JUNCTION 7880 11.0 12.9 86 12.5 12.7 99 CLOUD PEAK RESERVOIR 9860 18.2 16.7 110 16.5 15.0 111 DOME LAKE 8880 -M 14.7 * 12.6 14.5 87 GRAVE SPRINGS 8550 10.2 10.5 98 13.2 10.9 123 HANSEN SAWMILL 8760 5.0 7.6 65 9.4 9.0 105 MIDDLE POWDER 7760 15.6 13.5 116 18.9 13.1 145 POWDER RIVER PASS 9480 12.2 11.5 107 15.7 12.9 123 SUCKER CREEK 8880 12.2 13.2 93 15.0 14.5 104 TIE CREEK 6870 -M -M * -M 12.2 * ----- ----- Basin wide percent of average 98 112 BELLE FOURCHE BLIND PARK 6890 7.0 11.6 61 16.9 11.6 146 NORTH RAPID CREEK 6130 6.8 -M * 14.5 -M * WARREN PEAK 6520 12.4 11.6 107 11.6 9.0 129 ----- ----- Basin wide percent of average 84 139 UPPER N. PLATTE RIVER COLUMBINE 9400 19.0 24.5 78 23.2 26.0 90 DIVIDE PEAK 8800 21.5 21.9 99 26.7 24.7 108 ELK RIVER 8700 17.7 20.4 87 23.9 20.4 118 JOE WRIGHT 10120 20.9 24.0 87 27.5 27.2 102 NORTH FRENCH CREEK 10100 33.8 27.9 121 31.9 25.4 126 OLD BATTLE 10000 32.0 35.3 91 38.8 32.5 120 SOUTH BRUSH CREEK 8400 11.5 13.1 88 20.7 18.2 114 TOWER 10500 47.4 48.5 98 40.8 39.2 105 WEBBER SPRINGS 9200 20.0 28.7 70 28.2 27.4 103 WILLOW CREEK PASS 9540 12.7 13.4 96 12.9 13.9 93 ----- ----- Basin wide percent of average 92 108 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 16.0 28.7 56 23.5 21.2 111 CASPER MTN. 7900 13.2 18.7 71 18.4 16.0 115 DEADMAN HILL 10220 16.7 17.7 94 17.9 18.5 97 DEER PARK 9700 18.4 -M * 23.9 -M * LAPRELE CREEK 8320 -M 10.1 * 16.2 13.0 125 RENO HILL 8400 15.7 15.5 102 20.7 20.5 101 ROACH 9700 15.9 18.2 88 20.7 23.0 90 SAND LAKE 10080 37.9 35.4 108 30.5 22.2 138 SOUTH PASS 9040 19.5 17.5 112 20.9 18.7 113 WINDY PEAK 7840 7.6 9.4 82 14.2 10.6 134 ----- ----- Basin wide percent of average 89 112 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 12.5 11.0 113 18.9 16.7 114 DIVIDE PEAK 8800 21.5 21.9 99 26.7 24.7 108 OLD BATTLE 10000 32.0 35.3 91 38.8 32.5 120 SANDSTONE RS 8150 14.0 15.4 91 22.4 20.4 110 WHISKEY PARK 8950 29.4 30.5 97 31.9 30.7 105 ----- ----- Basin wide percent of average 96 111 UPPER GREEN RIVER BIG SANDY OPENING 9100 16.7 15.5 109 16.2 17.4 93 BLIND BULL SUM 8650 29.7 30.9 96 23.4 25.7 92 EAST RIM DIVIDE 7930 14.5 15.0 98 15.0 16.4 92 ELKHART PARK G.S. 9400 14.9 15.0 100 15.7 17.2 92 GROS VENTRE SUMMIT 8775 16.7 16.0 105 16.7 17.2 98 KENDALL R.S. 7740 16.0 13.5 119 17.2 16.7 104 LOOMIS PARK 8240 -M 17.0 * 21.2 20.2 105 NEW FORK LAKE 8340 13.6 10.9 126 12.7 15.5 82 SNIDER BASIN 8250 18.7 15.5 121 18.7 16.2 116 SPRING CREEK DIVIDE 9000 32.3 29.4 111 29.7 29.2 102 TRIPLE PEAK 8500 31.7 26.9 118 31.9 33.2 97 ----- ----- Basin wide percent of average 109 98 LOWER GREEN RIVER HAMS FORK 7840 14.5 6.8 217 12.5 14.5 87 HEWINTA 9500 13.1 9.5 140 15.4 14.5 107 HICKERSON PARK 9150 6.8 6.8 102 10.5 10.7 98 HOLE-IN-ROCK 9150 6.8 6.3 108 11.0 10.7 103 INDIAN CREEK 9425 32.3 30.2 107 26.9 27.7 98 KELLEY R.S. 8180 17.9 17.7 102 20.0 20.2 100 STEEL CREEK PARK 10100 16.0 17.9 90 18.0 14.2 127 ----- ----- Basin wide percent of average 114 102 UPPER BEAR RIVER BUG LAKE 7950 24.0 20.2 119 21.9 20.9 105 HAYDEN FORK 9400 15.9 11.7 136 22.0 20.7 107 KELLEY R.S. 8180 17.9 17.7 102 20.0 20.2 100 LILY LAKE 9050 12.9 13.0 99 19.0 16.2 119 MONTE CRISTO 8960 27.9 29.4 95 28.2 27.7 102 SALT RIVER SUMMIT 7600 16.9 14.0 121 19.4 18.2 108 TRIAL LAKE 9960 22.2 25.9 86 23.2 25.9 90 ----- ----- Basin wide percent of average 105 103 ----------------------------------------------------------------------------- -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.