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 1 , 2003 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 20.6 18.1 114 22.8 21.7 105 COTTONWOOD CREEK 7600 23.2 24.2 96 24.4 27.8 88 GRANITE CREEK 6770 14.9 18.6 80 17.4 20.1 87 GRASSY LAKE 7265 32.9 36.1 91 32.6 36.4 90 GROS VENTRE SUMMIT 8775 13.1 14.4 91 12.0 13.0 92 LEWIS LAKE DIVIDE 7860 34.3 35.8 96 30.3 37.2 81 PHILLIPS BENCH 8200 -M 29.2 * -M 29.4 * SALT RIVER SUMMIT 7600 11.9 14.6 82 14.2 19.0 75 SNAKE RIVER STATION 6920 14.7 19.2 77 21.2 22.5 94 SPRING CREEK DIVIDE 9000 25.9 26.9 96 23.7 26.8 88 THUMB DIVIDE 7980 15.6 19.2 81 16.1 19.1 84 TOGWOTEE PASS 9580 24.4 25.2 97 24.5 24.9 98 TWO OCEAN PLATEAU 9360 30.9 28.4 109 26.6 28.0 95 WILLOW CREEK 8450 30.4 30.6 99 33.4 32.6 102 ----- ----- Basin wide percent of average 94 91 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 26.5 23.6 112 23.1 20.3 114 BLACK BEAR 8170 -M 39.8 * -M 40.9 * CANYON 8090 13.4 13.9 96 14.5 15.6 93 FISHER CREEK 9100 36.4 35.4 103 33.4 36.8 91 MADISON PLATEAU 7750 18.8 25.5 74 18.7 27.1 69 NORTHEAST ENTRANCE 7350 11.2 11.3 99 13.3 12.8 104 PARKER PEAK 9400 25.0 21.9 114 20.5 16.4 125 SYLVAN LAKE 8420 21.0 22.8 92 23.2 21.1 110 THUMB DIVIDE 7980 15.6 19.2 81 16.1 19.1 84 TWO OCEAN PLATEAU 9360 30.9 28.4 109 26.6 28.0 95 WHISKEY CREEK 6800 11.2 17.4 64 14.3 21.2 67 WHITE MILL 8700 26.8 24.6 109 23.2 27.3 85 WOLVERINE 7650 12.7 11.6 109 12.5 12.9 97 ----- ----- Basin wide percent of average 98 93 WIND RIVER BURROUGHS CREEK 8750 18.2 14.8 123 19.5 16.4 119 COLD SPRINGS 9630 8.8 9.0 98 10.8 10.7 101 DEER PARK 9700 15.1 17.1 88 17.6 22.1 80 HOBBS PARK 10100 14.7 15.1 97 13.3 12.9 103 LITTLE WARM 9370 10.2 12.0 85 11.4 13.5 84 SOUTH PASS 9040 14.5 16.7 87 14.8 18.6 80 ST. LAWRENCE ALT 8620 8.0 7.4 108 9.0 8.9 101 TOGWOTEE PASS 9580 24.4 25.2 97 24.5 24.9 98 TOWNSEND CREEK 8700 10.6 8.8 120 12.2 11.7 104 ----- ----- Basin wide percent of average 99 95 BIGHORN BASIN BALD MTN. 9380 19.4 19.9 97 17.6 17.5 101 BEAR TRAP MEADOW 8200 7.4 5.2 142 7.7 8.3 93 BLACKWATER 9780 26.1 24.8 105 22.6 20.7 109 BONE SPRINGS DIV 9350 17.3 16.4 105 16.2 14.7 110 EVENING STAR 9200 30.4 30.1 101 31.9 25.5 125 GRAVE SPRINGS 8550 7.0 9.4 74 7.9 9.7 81 KIRWIN 9550 12.3 11.5 107 13.4 11.3 119 MARQUETTE 8760 13.2 9.0 147 13.9 9.8 142 MIDDLE POWDER 7760 8.8 11.8 75 7.4 12.4 60 OWL CREEK 8975 7.1 5.6 127 6.6 5.9 112 POWDER RIVER PASS 9480 10.9 10.9 100 11.9 12.4 96 SHELL CREEK 9580 15.9 14.9 107 14.2 13.4 106 SYLVAN LAKE 8420 21.0 22.8 92 23.2 21.1 110 SYLVAN ROAD 7120 14.0 12.9 109 17.5 17.8 98 TIMBER CREEK 7950 6.5 5.8 112 7.6 7.4 103 YOUNTS PEAK 8350 17.3 17.3 100 16.9 16.3 104 ----- ----- Basin wide percent of average 103 105 SHOSHONE RIVER BLACKWATER 9780 26.1 24.8 105 22.6 20.7 109 EVENING STAR 9200 30.4 30.1 101 31.9 25.5 125 KIRWIN 9550 12.3 11.5 107 13.4 11.3 119 MARQUETTE 8760 13.2 9.0 147 13.9 9.8 142 SYLVAN LAKE 8420 21.0 22.8 92 23.2 21.1 110 SYLVAN ROAD 7120 14.0 12.9 109 17.5 17.8 98 YOUNTS PEAK 8350 17.3 17.3 100 16.9 16.3 104 ----- ----- Basin wide percent of average 105 114 POWDER-TONGUE BEAR TRAP MEADOW 8200 7.4 5.2 142 7.7 8.3 93 BIG GOOSE 7990 12.5 10.7 117 13.6 8.5 160 BONE SPRINGS DIV 9350 17.3 16.4 105 16.2 14.7 110 BURGESS JUNCTION 7880 12.5 11.7 107 13.0 12.2 107 CLOUD PEAK RESERVOIR 9860 16.5 13.5 122 14.1 12.9 109 DOME LAKE 8880 14.6 12.6 116 14.7 13.2 111 GRAVE SPRINGS 8550 7.0 9.4 74 7.9 9.7 81 HANSEN SAWMILL 8360 9.7 6.5 149 10.8 8.2 132 MIDDLE POWDER 7760 8.8 11.8 75 7.4 12.4 60 POWDER RIVER PASS 9480 10.9 10.9 100 11.9 12.4 96 SUCKER CREEK 8880 15.2 11.8 129 15.5 13.6 114 TIE CREEK 6870 8.7 6.1 143 13.2 9.9 133 ----- ----- Basin wide percent of average 111 107 BELLE FOURCHE BLIND PARK 6890 8.2 8.7 94 9.9 11.1 89 COLE CANYON 5910 4.5 -M * 6.5 -M * NORTH RAPID CREEK 6130 5.9 8.3 71 8.3 8.6 97 ----- ----- Basin wide percent of average 83 92 UPPER N. PLATTE RIVER COLUMBINE 9400 23.1 25.0 92 23.7 25.3 94 DIVIDE PEAK 8800 21.7 20.0 108 20.8 20.8 100 ELK RIVER 8700 17.9 19.6 91 18.9 19.7 96 JOE WRIGHT 10120 24.4 21.5 113 28.3 24.9 114 NORTH FRENCH CREEK 10100 31.1 29.5 105 27.2 24.8 110 OLD BATTLE 10000 29.3 32.4 90 32.7 34.8 94 SAGE CREEK BASIN 7850 11.3 11.6 97 12.3 12.1 102 SOUTH BRUSH CREEK 8400 13.9 13.2 105 17.0 16.4 104 TOWER 10500 43.0 45.8 94 33.7 38.6 87 WEBBER SPRINGS 9200 22.1 26.4 84 24.9 26.8 93 WILLOW CREEK PASS 9540 15.7 12.1 130 14.4 12.9 112 ----- ----- Basin wide percent of average 99 99 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 18.0 23.9 75 21.0 22.1 95 CASPER MTN. 7900 14.7 14.6 101 11.4 14.4 79 DEADMAN HILL 10220 14.0 16.4 85 17.4 17.0 102 DEER PARK 9700 15.1 17.1 88 17.6 22.1 80 LAPRELE CREEK 8320 8.8 11.0 80 10.8 12.6 86 RENO HILL 8400 12.8 14.3 90 13.3 15.0 89 ROACH 9700 17.9 17.2 104 19.5 18.7 104 SAND LAKE 10080 25.3 32.7 77 -M 24.2 * SOUTH PASS 9040 14.5 16.7 87 14.8 18.6 80 WINDY PEAK 7840 10.1 8.1 125 11.2 10.6 106 ----- ----- Basin wide percent of average 88 91 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 11.8 11.0 107 15.6 15.9 98 DIVIDE PEAK 8800 21.7 20.0 108 20.8 20.8 100 OLD BATTLE 10000 29.3 32.4 90 32.7 34.8 94 SANDSTONE RS 8150 13.6 14.8 92 18.0 18.8 96 WHISKEY PARK 8950 27.3 30.4 90 26.6 28.8 92 ----- ----- Basin wide percent of average 95 95 UPPER GREEN RIVER BIG SANDY OPENING 9100 11.9 14.7 81 11.1 13.5 82 BLIND BULL SUM 8650 23.9 28.3 84 17.4 22.5 77 EAST RIM DIVIDE 7930 10.9 13.3 82 10.6 12.2 87 ELKHART PARK G.S. 9400 -M 13.6 * -M 13.4 * GROS VENTRE SUMMIT 8775 13.1 14.4 91 12.0 13.0 92 KENDALL R.S. 7740 12.8 14.6 88 13.5 14.7 92 LOOMIS PARK 8240 18.3 17.5 105 16.4 17.6 93 NEW FORK LAKE 8340 10.6 11.3 94 -M 11.4 * SNIDER BASIN 8250 13.7 14.7 93 13.5 16.3 83 SPRING CREEK DIVIDE 9000 25.9 26.9 96 23.7 26.8 88 TRIPLE PEAK 8500 24.9 25.2 99 26.6 25.1 106 ----- ----- Basin wide percent of average 92 90 LOWER GREEN RIVER HAMS FORK 7840 12.1 12.0 101 11.0 12.3 89 HEWINTA 9500 10.3 12.1 85 11.6 14.7 79 HICKERSON PARK 9150 6.9 7.7 90 8.7 8.0 109 HOLE-IN-ROCK 9150 7.7 7.2 107 9.1 7.5 121 INDIAN CREEK 9425 24.1 28.2 85 20.0 25.7 78 KELLEY R.S. 8180 13.8 17.1 81 14.7 20.6 71 STEEL CREEK PARK 10100 12.8 15.9 81 13.0 16.3 80 ----- ----- Basin wide percent of average 88 84 UPPER BEAR RIVER BUG LAKE 7950 16.0 21.2 75 15.9 19.5 82 HAYDEN FORK 9400 14.2 16.6 86 17.8 21.2 84 KELLEY R.S. 8180 13.8 17.1 81 14.7 20.6 71 LILY LAKE 9050 12.3 13.5 91 14.0 17.6 80 MONTE CRISTO 8960 15.5 30.1 51 20.6 25.7 80 SALT RIVER SUMMIT 7600 11.9 14.6 82 14.2 19.0 75 TRIAL LAKE 9960 13.9 25.3 55 15.8 25.2 63 ----- ----- Basin wide percent of average 71 76 ----------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. Units = inches for the Current and Average Snow Water Equivalent and Total Precipitation values 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 1971-2000. 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.