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 11 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 24.0 16.7 145 28.0 23.7 119 COTTONWOOD CREEK 7600 26.5 23.7 112 29.4 26.7 111 GRANITE CREEK 6770 22.4 18.2 124 23.7 25.0 95 GRASSY LAKE 7265 44.3 37.4 119 42.3 39.4 108 GROS VENTRE SUMMIT 8775 16.9 16.0 106 16.7 17.0 98 LEWIS LAKE DIVIDE 7860 41.8 36.5 115 41.2 40.2 103 PHILLIPS BENCH 8200 -M 30.5 * -M 31.7 * SALT RIVER SUMMIT 7600 16.9 14.1 120 19.2 18.0 107 SNAKE RIVER STATION 6920 23.0 18.7 123 26.5 27.7 96 SPRING CREEK DIVIDE 9000 32.3 29.2 111 29.4 29.2 102 THUMB DIVIDE 7980 24.4 17.4 141 23.4 22.2 106 TOGWOTEE PASS 9580 -M 26.5 * 30.4 30.0 102 TWO OCEAN PLATEAU 9360 37.8 26.7 142 31.9 32.7 98 WILLOW CREEK 8450 34.9 31.4 112 39.0 34.2 115 ----- ----- Basin wide percent of average 121 105 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 26.9 25.2 108 24.0 19.4 125 BLACK BEAR 7950 51.8 39.8 131 -M 43.2 * CANYON 7940 18.7 13.5 140 20.2 15.1 134 FISHER CREEK 9100 41.3 37.4 111 37.8 38.9 98 MADISON PLATEAU 7750 -M 25.4 * 33.7 27.9 121 NORTHEAST ENTRANCE 7350 13.1 9.1 144 14.5 12.6 116 PARKER PEAK 9400 25.0 22.9 110 -M 16.7 * SYLVAN LAKE 8420 27.5 23.5 118 29.2 20.4 143 THUMB DIVIDE 7980 24.4 17.4 141 23.4 22.2 106 TWO OCEAN PLATEAU 9360 37.8 26.7 142 31.9 32.7 98 WHISKEY CREEK 6800 -M 18.0 * -M 23.2 * WHITE MILL 8700 28.9 25.7 113 25.5 30.2 85 WOLVERINE 7650 13.0 11.9 111 13.0 13.7 95 ----- ----- Basin wide percent of average 122 109 WIND RIVER BURROUGHS CREEK 8750 17.7 15.4 116 19.2 17.7 108 COLD SPRINGS 9630 10.2 8.7 118 13.1 11.5 114 DEER PARK 9700 18.4 -M * 23.9 -M * HOBBS PARK 10100 19.2 16.2 119 17.9 15.4 117 LITTLE WARM 9620 15.7 13.0 121 17.4 14.5 121 SOUTH PASS 9040 -M 17.4 * -M 18.4 * ST. LAWRENCE ALT 8620 7.6 7.3 105 11.5 11.0 105 TOGWOTEE PASS 9580 -M 26.5 * 30.4 30.0 102 TOWNSEND CREEK 8700 11.1 10.4 108 14.5 13.6 107 ----- ----- Basin wide percent of average 116 109 BIGHORN BASIN BALD MTN. 9375 21.2 21.9 97 19.4 18.7 104 BEAR TRAP MEADOW 7900 4.5 7.0 65 10.4 9.0 115 BLACKWATER 9780 31.7 24.2 132 26.4 19.0 139 BONE SPRINGS DIV 9350 19.2 17.7 109 18.0 16.2 112 EVENING STAR 9200 34.4 28.7 120 35.8 23.9 151 GRAVE SPRINGS 8550 10.2 10.5 99 13.2 10.6 125 KIRWIN 9550 13.6 10.9 126 15.2 11.7 130 MARQUETTE 8760 10.0 8.6 116 10.5 11.0 97 MIDDLE POWDER 7760 -M 13.4 * 18.9 13.0 146 OWL CREEK 8975 7.0 4.8 147 7.3 7.0 105 POWDER RIVER PASS 9480 13.1 11.5 114 15.7 12.6 125 SHELL CREEK 9580 17.5 16.0 111 16.2 14.1 115 SYLVAN LAKE 8420 27.5 23.5 118 29.2 20.4 143 SYLVAN ROAD 8120 -M 11.4 * -M 17.0 * TIMBER CREEK 7950 6.0 6.6 91 8.0 8.1 98 YOUNTS PEAK 8350 22.2 18.2 123 19.7 17.7 112 ----- ----- Basin wide percent of average 114 124 SHOSHONE RIVER BLACKWATER 9780 31.7 24.2 132 26.4 19.0 139 EVENING STAR 9200 34.4 28.7 120 35.8 23.9 151 KIRWIN 9550 13.6 10.9 126 15.2 11.7 130 MARQUETTE 8760 10.0 8.6 116 10.5 11.0 97 SYLVAN LAKE 8420 27.5 23.5 118 29.2 20.4 143 SYLVAN ROAD 8120 -M 11.4 * -M 17.0 * YOUNTS PEAK 8350 22.2 18.2 123 19.7 17.7 112 ----- ----- Basin wide percent of average 123 133 POWDER-TONGUE BEAR TRAP MEADOW 7900 4.5 7.0 65 10.4 9.0 115 BIG GOOSE 7990 8.5 -M * 12.1 -M * BONE SPRINGS DIV 9350 19.2 17.7 109 18.0 16.2 112 BURGESS JUNCTION 7880 11.0 12.6 87 12.5 12.5 100 CLOUD PEAK RESERVOIR 9860 17.9 16.4 110 16.0 14.6 110 DOME LAKE 8880 -M 14.6 * 12.6 14.4 89 GRAVE SPRINGS 8550 10.2 10.5 99 13.2 10.6 125 HANSEN SAWMILL 8760 4.8 7.5 65 9.4 8.9 106 MIDDLE POWDER 7760 -M 13.4 * 18.9 13.0 146 POWDER RIVER PASS 9480 13.1 11.5 114 15.7 12.6 125 SUCKER CREEK 8880 12.2 13.0 94 14.9 14.4 104 TIE CREEK 6870 -M -M * -M 12.0 * ----- ----- Basin wide percent of average 97 113 BELLE FOURCHE BLIND PARK 6890 6.8 11.5 60 16.9 11.4 150 NORTH RAPID CREEK 6130 6.8 -M * 14.5 -M * WARREN PEAK 6520 12.5 11.5 108 11.7 8.9 133 ----- ----- Basin wide percent of average 84 143 UPPER N. PLATTE RIVER COLUMBINE 9400 19.4 24.7 79 22.7 25.9 88 DIVIDE PEAK 8800 21.5 21.7 100 26.4 24.4 108 ELK RIVER 8700 17.4 20.4 86 23.2 20.2 115 JOE WRIGHT 10120 21.4 23.7 90 27.4 26.9 103 NORTH FRENCH CREEK 10100 33.7 27.5 123 31.9 25.2 128 OLD BATTLE 10000 31.9 34.8 92 38.4 32.2 120 SOUTH BRUSH CREEK 8400 11.6 13.2 88 20.7 17.9 116 TOWER 10500 47.3 48.0 99 40.0 38.7 104 WEBBER SPRINGS 9200 20.2 28.7 71 27.9 27.2 103 WILLOW CREEK PASS 9540 12.6 13.1 97 12.2 13.6 90 ----- ----- Basin wide percent of average 93 108 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 16.0 28.4 57 23.4 20.9 112 CASPER MTN. 7900 13.2 18.4 72 18.2 15.7 116 DEADMAN HILL 10220 16.7 17.5 95 17.9 18.2 99 DEER PARK 9700 18.4 -M * 23.9 -M * LAPRELE CREEK 8320 -M 10.2 * 16.0 12.9 125 RENO HILL 8400 16.0 15.2 105 20.4 20.4 100 ROACH 9700 15.6 18.0 87 20.7 22.7 91 SAND LAKE 10080 37.8 35.0 108 30.4 21.9 139 SOUTH PASS 9040 -M 17.4 * -M 18.4 * WINDY PEAK 7840 7.5 9.2 82 14.0 10.5 133 ----- ----- Basin wide percent of average 87 113 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 12.7 11.1 115 18.9 16.4 116 DIVIDE PEAK 8800 21.5 21.7 100 26.4 24.4 108 OLD BATTLE 10000 31.9 34.8 92 38.4 32.2 120 SANDSTONE RS 8150 14.0 15.4 92 22.2 20.2 111 WHISKEY PARK 8950 29.2 30.4 97 31.9 30.2 106 ----- ----- Basin wide percent of average 97 112 UPPER GREEN RIVER BIG SANDY OPENING 9100 16.9 15.4 110 16.0 17.4 93 BLIND BULL SUM 8650 28.7 30.7 94 23.2 25.4 92 EAST RIM DIVIDE 7930 14.6 14.9 99 14.9 16.2 92 ELKHART PARK G.S. 9400 15.0 14.7 102 15.7 17.0 93 GROS VENTRE SUMMIT 8775 16.9 16.0 106 16.7 17.0 98 KENDALL R.S. 7740 16.2 13.6 119 17.0 16.5 104 LOOMIS PARK 8240 -M 17.2 * 21.2 20.2 105 NEW FORK LAKE 8340 13.5 11.0 123 12.5 15.5 82 SNIDER BASIN 8250 18.5 15.5 121 18.7 16.2 116 SPRING CREEK DIVIDE 9000 32.3 29.2 111 29.4 29.2 102 TRIPLE PEAK 8500 31.4 26.7 118 31.9 32.9 97 ----- ----- Basin wide percent of average 109 98 LOWER GREEN RIVER HAMS FORK 7840 15.0 7.6 198 12.5 14.4 87 HEWINTA 9500 13.6 9.9 139 15.5 14.2 109 HICKERSON PARK 9150 5.8 6.8 86 10.5 10.5 100 HOLE-IN-ROCK 9150 7.3 6.3 115 10.9 10.5 103 INDIAN CREEK 9425 32.0 30.0 107 26.7 27.5 98 KELLEY R.S. 8180 18.0 17.7 103 19.9 20.0 100 STEEL CREEK PARK 10100 16.0 17.7 91 17.9 14.0 128 ----- ----- Basin wide percent of average 113 103 UPPER BEAR RIVER BUG LAKE 7950 24.2 20.4 119 21.7 20.7 105 HAYDEN FORK 9400 16.2 12.5 129 21.5 20.5 105 KELLEY R.S. 8180 18.0 17.7 103 19.9 20.0 100 LILY LAKE 9050 13.1 13.1 100 19.2 16.0 121 MONTE CRISTO 8960 28.5 29.5 97 28.0 27.4 103 SALT RIVER SUMMIT 7600 16.9 14.1 120 19.2 18.0 107 TRIAL LAKE 9960 22.4 25.9 87 23.4 25.5 92 ----- ----- Basin wide percent of average 105 104 ----------------------------------------------------------------------------- -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.