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 18 , 2003 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 14.9 16.0 93 23.4 23.2 101 COTTONWOOD CREEK 7600 19.0 23.1 82 25.5 30.1 85 GRANITE CREEK 6770 11.1 16.2 69 17.7 21.4 83 GRASSY LAKE 7265 31.6 36.3 87 34.7 38.9 89 GROS VENTRE SUMMIT 8775 12.7 14.4 88 12.4 14.3 87 LEWIS LAKE DIVIDE 7860 33.3 36.3 92 31.8 39.7 80 PHILLIPS BENCH 8200 -M 30.4 * -M 31.5 * SALT RIVER SUMMIT 7600 9.2 13.7 67 14.7 20.5 72 SNAKE RIVER STATION 6920 11.2 16.5 68 22.4 24.2 93 SPRING CREEK DIVIDE 9000 26.3 28.5 92 24.5 28.7 85 THUMB DIVIDE 7980 13.8 18.0 77 17.7 20.7 86 TOGWOTEE PASS 9580 24.6 26.9 91 25.5 27.2 94 TWO OCEAN PLATEAU 9360 32.7 30.8 106 28.0 30.3 92 WILLOW CREEK 8450 26.2 31.7 83 35.3 35.5 99 ----- ----- Basin wide percent of average 86 88 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 27.6 25.6 108 24.1 22.1 109 BLACK BEAR 8170 35.6 40.7 87 32.8 43.7 75 CANYON 8090 12.6 13.4 94 15.6 16.8 93 FISHER CREEK 9100 37.0 37.1 100 35.6 39.7 90 MADISON PLATEAU 7750 20.1 25.7 78 21.5 29.0 74 NORTHEAST ENTRANCE 7350 8.0 10.0 80 14.1 13.9 101 PARKER PEAK 9400 26.1 23.6 111 21.4 18.2 118 SYLVAN LAKE 8420 -M 24.1 * -M 23.1 * THUMB DIVIDE 7980 13.8 18.0 77 17.7 20.7 86 TWO OCEAN PLATEAU 9360 32.7 30.8 106 28.0 30.3 92 WHISKEY CREEK 6800 11.9 17.3 69 16.2 22.9 71 WHITE MILL 8700 27.9 26.1 107 24.8 29.5 84 WOLVERINE 7650 9.5 10.3 92 13.0 14.2 92 ----- ----- Basin wide percent of average 94 88 WIND RIVER BURROUGHS CREEK 8750 17.8 14.8 120 19.9 18.0 111 COLD SPRINGS 9630 4.8 6.7 72 10.8 12.5 86 DEER PARK 9700 13.8 17.4 79 18.6 24.9 75 HOBBS PARK 10100 12.8 17.0 75 14.1 15.2 93 LITTLE WARM 9370 8.4 12.2 69 12.0 15.4 78 SOUTH PASS 9040 12.3 17.8 69 15.1 20.9 72 ST. LAWRENCE ALT 8620 4.9 7.1 69 9.2 10.7 86 TOGWOTEE PASS 9580 24.6 26.9 91 25.5 27.2 94 TOWNSEND CREEK 8700 8.3 9.7 86 12.9 13.9 93 ----- ----- Basin wide percent of average 83 87 BIGHORN BASIN BALD MTN. 9380 18.7 22.2 84 18.0 19.7 91 BEAR TRAP MEADOW 8200 4.0 4.3 93 8.9 9.8 91 BLACKWATER 9780 26.7 27.3 98 23.4 23.0 102 BONE SPRINGS DIV 9350 18.4 17.8 103 17.2 16.7 103 EVENING STAR 9200 30.8 32.2 96 33.4 28.0 119 GRAVE SPRINGS 8550 5.6 10.8 52 8.2 11.6 71 KIRWIN 9550 12.1 12.4 98 13.6 12.9 105 MARQUETTE 8760 11.9 10.7 111 14.1 12.0 118 MIDDLE POWDER 7760 8.6 14.1 61 8.1 14.3 57 OWL CREEK 8975 3.7 5.0 74 6.7 7.2 93 POWDER RIVER PASS 9480 9.4 11.7 80 13.2 14.3 92 SHELL CREEK 9580 14.8 16.2 91 15.1 15.3 99 SYLVAN LAKE 8420 -M 24.1 * -M 23.1 * SYLVAN ROAD 7120 11.9 11.3 105 18.5 19.3 96 TIMBER CREEK 7950 5.1 5.5 93 8.2 9.2 89 YOUNTS PEAK 8350 17.2 18.1 95 17.3 17.7 98 ----- ----- Basin wide percent of average 91 97 SHOSHONE RIVER BLACKWATER 9780 26.7 27.3 98 23.4 23.0 102 EVENING STAR 9200 30.8 32.2 96 33.4 28.0 119 KIRWIN 9550 12.1 12.4 98 13.6 12.9 105 MARQUETTE 8760 11.9 10.7 111 14.1 12.0 118 SYLVAN LAKE 8420 -M 24.1 * -M 23.1 * SYLVAN ROAD 7120 11.9 11.3 105 18.5 19.3 96 YOUNTS PEAK 8350 17.2 18.1 95 17.3 17.7 98 ----- ----- Basin wide percent of average 99 107 POWDER-TONGUE BEAR TRAP MEADOW 8200 4.0 4.3 93 8.9 9.8 91 BIG GOOSE 7990 10.8 12.2 89 14.2 11.0 129 BONE SPRINGS DIV 9350 18.4 17.8 103 17.2 16.7 103 BURGESS JUNCTION 7880 11.8 13.2 89 13.6 14.0 97 CLOUD PEAK RESERVOIR 9860 14.8 15.5 95 15.1 15.3 99 DOME LAKE 8880 12.1 13.9 87 15.9 15.2 105 GRAVE SPRINGS 8550 5.6 10.8 52 8.2 11.6 71 HANSEN SAWMILL 8360 6.2 6.0 103 10.7 9.8 109 MIDDLE POWDER 7760 8.6 14.1 61 8.1 14.3 57 POWDER RIVER PASS 9480 9.4 11.7 80 13.2 14.3 92 SUCKER CREEK 8880 13.1 13.4 98 16.3 15.8 103 TIE CREEK 6870 4.4 5.0 88 13.6 11.9 114 ----- ----- Basin wide percent of average 86 97 BELLE FOURCHE BLIND PARK 6890 2.0 6.9 29 10.1 12.9 78 COLE CANYON 5910 .0 -M * 7.3 -M * NORTH RAPID CREEK 6130 .5 7.9 6 8.6 10.2 84 ----- ----- Basin wide percent of average 17 81 UPPER N. PLATTE RIVER COLUMBINE 9400 20.0 24.0 83 26.2 27.5 95 DIVIDE PEAK 8800 19.7 20.6 96 22.0 22.8 96 ELK RIVER 8700 15.3 18.7 82 20.4 21.6 94 JOE WRIGHT 10120 26.5 23.9 111 31.5 27.8 113 NORTH FRENCH CREEK 10100 32.7 33.0 99 31.9 27.6 116 OLD BATTLE 10000 31.4 35.1 89 35.3 37.7 94 SAGE CREEK BASIN 7850 4.5 11.9 38 13.0 13.2 98 SOUTH BRUSH CREEK 8400 11.2 12.9 87 18.9 18.5 102 TOWER 10500 45.7 50.0 91 45.1 42.3 107 WEBBER SPRINGS 9200 19.8 25.9 76 26.5 29.2 91 WILLOW CREEK PASS 9540 17.0 13.7 124 15.5 14.5 107 ----- ----- Basin wide percent of average 90 101 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 18.4 26.8 69 22.5 24.9 90 CASPER MTN. 7900 13.2 16.9 78 12.8 17.3 74 DEADMAN HILL 10220 16.2 18.6 87 19.9 19.3 103 DEER PARK 9700 13.8 17.4 79 18.6 24.9 75 LAPRELE CREEK 8320 5.9 9.6 61 11.5 14.8 78 RENO HILL 8400 12.2 15.7 78 14.9 17.9 83 ROACH 9700 16.9 18.4 92 20.8 20.8 100 SAND LAKE 10080 27.3 35.4 77 22.8 27.1 84 SOUTH PASS 9040 12.3 17.8 69 15.1 20.9 72 WINDY PEAK 7840 7.8 7.4 105 11.8 12.2 97 ----- ----- Basin wide percent of average 78 85 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 3.4 7.9 43 16.2 17.4 93 DIVIDE PEAK 8800 19.7 20.6 96 22.0 22.8 96 OLD BATTLE 10000 31.4 35.1 89 35.3 37.7 94 SANDSTONE RS 8150 8.7 12.7 69 19.1 20.6 93 WHISKEY PARK 8950 27.6 30.7 90 28.9 31.6 91 ----- ----- Basin wide percent of average 85 93 UPPER GREEN RIVER BIG SANDY OPENING 9100 10.6 15.0 71 11.5 14.9 77 BLIND BULL SUM 8650 23.4 28.7 82 17.9 24.0 75 EAST RIM DIVIDE 7930 10.3 13.8 75 10.9 13.2 83 ELKHART PARK G.S. 9400 12.4 13.8 90 13.0 14.9 87 GROS VENTRE SUMMIT 8775 12.7 14.4 88 12.4 14.3 87 KENDALL R.S. 7740 9.0 12.9 70 13.6 15.8 86 LOOMIS PARK 8240 14.1 16.6 85 16.8 18.9 89 NEW FORK LAKE 8340 8.7 10.8 81 -M 12.5 * SNIDER BASIN 8250 11.4 14.5 79 13.8 17.5 79 SPRING CREEK DIVIDE 9000 26.3 28.5 92 24.5 28.7 85 TRIPLE PEAK 8500 21.8 25.5 85 27.7 27.1 102 ----- ----- Basin wide percent of average 83 86 LOWER GREEN RIVER HAMS FORK 7840 6.4 9.2 70 11.4 13.7 83 HEWINTA 9500 6.3 11.7 54 12.7 16.5 77 HICKERSON PARK 9150 2.2 7.8 28 8.7 9.2 95 HOLE-IN-ROCK 9150 5.2 6.8 76 9.7 8.7 111 INDIAN CREEK 9425 23.1 29.4 79 20.6 27.9 74 KELLEY R.S. 8180 11.6 16.6 70 15.2 22.3 68 STEEL CREEK PARK 10100 14.0 17.5 80 14.2 18.5 77 ----- ----- Basin wide percent of average 69 79 UPPER BEAR RIVER BUG LAKE 7950 14.3 21.0 68 16.8 21.1 80 HAYDEN FORK 9400 7.5 15.8 47 19.1 23.4 82 KELLEY R.S. 8180 11.6 16.6 70 15.2 22.3 68 LILY LAKE 9050 7.0 13.9 50 15.5 19.6 79 MONTE CRISTO 8960 12.6 30.2 42 22.1 28.3 78 SALT RIVER SUMMIT 7600 9.2 13.7 67 14.7 20.5 72 TRIAL LAKE 9960 13.1 26.4 50 17.5 27.6 63 ----- ----- Basin wide percent of average 55 74 ----------------------------------------------------------------------------- -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.