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 MONDAY: APRIL 21 , 2003 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 13.6 15.1 90 23.5 23.5 100 COTTONWOOD CREEK 7600 18.3 22.3 82 25.7 30.5 84 GRANITE CREEK 6770 9.8 15.4 64 17.7 21.6 82 GRASSY LAKE 7265 31.8 35.6 89 35.0 39.4 89 GROS VENTRE SUMMIT 8775 12.6 14.1 89 12.4 14.5 86 LEWIS LAKE DIVIDE 7860 33.2 35.9 92 32.0 40.1 80 PHILLIPS BENCH 8200 24.3 30.1 81 25.4 31.9 80 SALT RIVER SUMMIT 7600 8.3 13.0 64 14.8 20.7 71 SNAKE RIVER STATION 6920 10.7 15.5 69 22.6 24.5 92 SPRING CREEK DIVIDE 9000 26.2 28.5 92 24.6 29.1 85 THUMB DIVIDE 7980 13.3 17.3 77 17.8 21.0 85 TOGWOTEE PASS 9580 24.8 27.1 92 25.5 27.6 92 TWO OCEAN PLATEAU 9360 33.5 31.1 108 28.3 30.7 92 WILLOW CREEK 8450 26.1 31.4 83 35.7 36.0 99 ----- ----- Basin wide percent of average 86 87 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 27.5 25.6 107 24.2 22.4 108 BLACK BEAR 8170 35.9 40.5 89 33.2 44.2 75 CANYON 8090 12.4 12.9 96 15.6 17.0 92 FISHER CREEK 9100 37.6 37.3 101 35.8 40.2 89 MADISON PLATEAU 7750 20.2 25.4 80 21.7 29.3 74 NORTHEAST ENTRANCE 7350 7.3 9.3 78 14.1 14.1 100 PARKER PEAK 9400 26.7 23.8 112 21.6 18.5 117 SYLVAN LAKE 8420 -M 24.1 * -M 23.5 * THUMB DIVIDE 7980 13.3 17.3 77 17.8 21.0 85 TWO OCEAN PLATEAU 9360 33.5 31.1 108 28.3 30.7 92 WHISKEY CREEK 6800 11.8 16.8 70 16.6 23.2 72 WHITE MILL 8700 28.0 26.1 107 24.8 29.9 83 WOLVERINE 7650 8.5 9.6 89 13.1 14.4 91 ----- ----- Basin wide percent of average 95 88 WIND RIVER BURROUGHS CREEK 8750 17.8 14.5 123 19.8 18.3 108 COLD SPRINGS 9630 4.1 6.2 66 10.9 12.8 85 DEER PARK 9700 14.5 17.7 82 19.3 25.4 76 HOBBS PARK 10100 13.6 17.2 79 14.5 15.6 93 LITTLE WARM 9370 8.0 12.0 67 12.0 15.7 76 SOUTH PASS 9040 12.8 17.8 72 15.6 21.3 73 ST. LAWRENCE ALT 8620 4.8 6.8 71 9.4 11.0 85 TOGWOTEE PASS 9580 24.8 27.1 92 25.5 27.6 92 TOWNSEND CREEK 8700 8.6 9.5 91 13.2 14.2 93 ----- ----- Basin wide percent of average 85 87 BIGHORN BASIN BALD MTN. 9380 19.2 22.5 85 18.2 20.0 91 BEAR TRAP MEADOW 8200 3.4 3.9 87 9.1 10.0 91 BLACKWATER 9780 26.8 27.6 97 23.5 23.4 100 BONE SPRINGS DIV 9350 19.1 17.9 107 17.7 17.1 104 EVENING STAR 9200 30.7 32.5 94 33.6 28.4 118 GRAVE SPRINGS 8550 6.1 10.8 56 8.7 12.0 72 KIRWIN 9550 12.4 12.6 98 13.6 13.2 103 MARQUETTE 8760 12.7 10.9 117 15.0 12.4 121 MIDDLE POWDER 7760 8.7 14.1 62 8.2 14.7 56 OWL CREEK 8975 2.6 4.8 54 6.7 7.4 91 POWDER RIVER PASS 9480 9.4 11.4 82 13.3 14.7 90 SHELL CREEK 9580 15.4 16.4 94 15.3 15.7 97 SYLVAN LAKE 8420 -M 24.1 * -M 23.5 * SYLVAN ROAD 7120 11.5 10.6 108 18.6 19.6 95 TIMBER CREEK 7950 5.6 5.4 104 8.9 9.5 94 YOUNTS PEAK 8350 17.2 18.1 95 17.2 18.0 96 ----- ----- Basin wide percent of average 91 96 SHOSHONE RIVER BLACKWATER 9780 26.8 27.6 97 23.5 23.4 100 EVENING STAR 9200 30.7 32.5 94 33.6 28.4 118 KIRWIN 9550 12.4 12.6 98 13.6 13.2 103 MARQUETTE 8760 12.7 10.9 117 15.0 12.4 121 SYLVAN LAKE 8420 -M 24.1 * -M 23.5 * SYLVAN ROAD 7120 11.5 10.6 108 18.6 19.6 95 YOUNTS PEAK 8350 17.2 18.1 95 17.2 18.0 96 ----- ----- Basin wide percent of average 99 106 POWDER-TONGUE BEAR TRAP MEADOW 8200 3.4 3.9 87 9.1 10.0 91 BIG GOOSE 7990 11.3 12.1 93 14.9 11.4 131 BONE SPRINGS DIV 9350 19.1 17.9 107 17.7 17.1 104 BURGESS JUNCTION 7880 12.9 13.2 98 14.7 14.3 103 CLOUD PEAK RESERVOIR 9860 15.5 15.6 99 15.6 15.7 99 DOME LAKE 8880 12.7 13.8 92 16.8 15.6 108 GRAVE SPRINGS 8550 6.1 10.8 56 8.7 12.0 72 HANSEN SAWMILL 8360 6.2 5.7 109 10.8 10.1 107 MIDDLE POWDER 7760 8.7 14.1 62 8.2 14.7 56 POWDER RIVER PASS 9480 9.4 11.4 82 13.3 14.7 90 SUCKER CREEK 8880 14.0 13.3 105 17.5 16.1 109 TIE CREEK 6870 4.9 4.8 102 14.6 12.3 119 ----- ----- Basin wide percent of average 91 99 BELLE FOURCHE BLIND PARK 6890 2.0 6.2 32 10.5 13.2 80 COLE CANYON 5910 .0 -M * 7.2 -M * NORTH RAPID CREEK 6130 .0 6.9 0 8.8 10.5 84 ----- ----- Basin wide percent of average 15 81 UPPER N. PLATTE RIVER COLUMBINE 9400 20.3 23.3 87 26.5 27.9 95 DIVIDE PEAK 8800 19.9 20.3 98 22.4 23.1 97 ELK RIVER 8700 15.8 17.9 88 20.7 21.9 95 JOE WRIGHT 10120 27.2 24.2 112 32.1 28.4 113 NORTH FRENCH CREEK 10100 33.0 33.3 99 32.2 28.1 115 OLD BATTLE 10000 32.1 35.5 90 35.8 38.2 94 SAGE CREEK BASIN 7850 3.1 11.8 26 13.2 13.4 99 SOUTH BRUSH CREEK 8400 10.7 12.5 86 18.9 18.9 100 TOWER 10500 46.7 50.5 92 45.9 42.9 107 WEBBER SPRINGS 9200 20.3 25.7 79 26.9 29.7 91 WILLOW CREEK PASS 9540 17.4 13.8 126 15.8 14.8 107 ----- ----- Basin wide percent of average 92 101 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 18.4 27.1 68 22.6 25.4 89 CASPER MTN. 7900 13.7 16.9 81 13.3 17.8 75 DEADMAN HILL 10220 16.7 18.8 89 20.3 19.7 103 DEER PARK 9700 14.5 17.7 82 19.3 25.4 76 LAPRELE CREEK 8320 5.8 9.0 64 11.9 15.2 78 RENO HILL 8400 13.1 15.4 85 15.9 18.5 86 ROACH 9700 17.4 18.4 95 21.1 21.2 100 SAND LAKE 10080 28.0 35.8 78 24.7 27.6 89 SOUTH PASS 9040 12.8 17.8 72 15.6 21.3 73 WINDY PEAK 7840 7.7 6.8 113 12.2 12.5 98 ----- ----- Basin wide percent of average 81 86 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 2.0 7.2 28 16.2 17.7 92 DIVIDE PEAK 8800 19.9 20.3 98 22.4 23.1 97 OLD BATTLE 10000 32.1 35.5 90 35.8 38.2 94 SANDSTONE RS 8150 8.3 11.9 70 19.2 20.9 92 WHISKEY PARK 8950 28.0 30.6 92 29.3 32.1 91 ----- ----- Basin wide percent of average 86 93 UPPER GREEN RIVER BIG SANDY OPENING 9100 10.8 14.6 74 12.1 15.1 80 BLIND BULL SUM 8650 23.6 28.5 83 18.0 24.3 74 EAST RIM DIVIDE 7930 9.9 13.7 72 10.9 13.3 82 ELKHART PARK G.S. 9400 -M 13.6 * -M 15.1 * GROS VENTRE SUMMIT 8775 12.6 14.1 89 12.4 14.5 86 KENDALL R.S. 7740 7.9 12.2 65 13.6 16.0 85 LOOMIS PARK 8240 12.8 16.1 80 16.8 19.1 88 NEW FORK LAKE 8340 7.7 10.2 75 -M 12.7 * SNIDER BASIN 8250 10.6 14.0 76 13.8 17.8 78 SPRING CREEK DIVIDE 9000 26.2 28.5 92 24.6 29.1 85 TRIPLE PEAK 8500 20.4 25.1 81 27.7 27.4 101 ----- ----- Basin wide percent of average 81 85 LOWER GREEN RIVER HAMS FORK 7840 5.0 8.5 59 11.5 13.9 83 HEWINTA 9500 7.1 11.2 63 13.1 16.8 78 HICKERSON PARK 9150 3.1 7.3 42 9.4 9.5 99 HOLE-IN-ROCK 9150 5.9 6.3 94 10.0 9.0 111 INDIAN CREEK 9425 23.3 29.1 80 20.7 28.2 73 KELLEY R.S. 8180 11.0 16.0 69 14.4 22.6 64 STEEL CREEK PARK 10100 14.9 17.8 84 14.9 18.9 79 ----- ----- Basin wide percent of average 73 79 UPPER BEAR RIVER BUG LAKE 7950 14.2 20.3 70 17.1 21.4 80 HAYDEN FORK 9400 8.2 15.2 54 19.7 23.8 83 KELLEY R.S. 8180 11.0 16.0 69 14.4 22.6 64 LILY LAKE 9050 7.4 13.2 56 16.0 19.9 80 MONTE CRISTO 8960 13.0 29.7 44 22.7 28.8 79 SALT RIVER SUMMIT 7600 8.3 13.0 64 14.8 20.7 71 TRIAL LAKE 9960 13.7 26.4 52 18.2 28.0 65 ----- ----- Basin wide percent of average 57 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.