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 14 , 2003 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 16.4 16.9 97 23.0 22.9 100 COTTONWOOD CREEK 7600 20.1 23.8 84 25.1 29.6 85 GRANITE CREEK 6770 11.9 17.1 70 17.4 21.1 82 GRASSY LAKE 7265 32.0 36.9 87 33.8 38.4 88 GROS VENTRE SUMMIT 8775 12.5 14.6 86 12.2 14.0 87 LEWIS LAKE DIVIDE 7860 33.0 36.6 90 31.1 39.1 80 PHILLIPS BENCH 8200 -M 30.5 * -M 31.0 * SALT RIVER SUMMIT 7600 10.3 14.4 72 14.6 20.1 73 SNAKE RIVER STATION 6920 11.9 17.6 68 21.8 23.8 92 SPRING CREEK DIVIDE 9000 26.2 28.4 92 24.3 28.3 86 THUMB DIVIDE 7980 14.1 18.7 75 17.0 20.4 83 TOGWOTEE PASS 9580 23.9 26.6 90 24.8 26.7 93 TWO OCEAN PLATEAU 9360 31.6 30.4 104 27.4 29.8 92 WILLOW CREEK 8450 27.2 31.8 86 34.7 34.8 100 ----- ----- Basin wide percent of average 86 88 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 26.8 25.4 106 23.5 21.7 108 BLACK BEAR 8170 -M 40.8 * -M 43.0 * CANYON 8090 12.4 13.9 89 15.0 16.5 91 FISHER CREEK 9100 34.5 36.9 93 35.0 39.0 90 MADISON PLATEAU 7750 19.8 26.1 76 20.4 28.5 72 NORTHEAST ENTRANCE 7350 8.5 10.7 79 13.6 13.7 99 PARKER PEAK 9400 25.4 23.3 109 21.0 17.7 119 SYLVAN LAKE 8420 20.2 24.1 84 23.9 22.7 105 THUMB DIVIDE 7980 14.1 18.7 75 17.0 20.4 83 TWO OCEAN PLATEAU 9360 31.6 30.4 104 27.4 29.8 92 WHISKEY CREEK 6800 11.9 17.8 67 15.6 22.5 69 WHITE MILL 8700 27.2 25.9 105 24.2 29.0 83 WOLVERINE 7650 10.1 11.0 92 12.8 13.9 92 ----- ----- Basin wide percent of average 92 91 WIND RIVER BURROUGHS CREEK 8750 17.4 15.1 115 19.6 17.7 111 COLD SPRINGS 9630 6.3 7.2 88 10.9 12.1 90 DEER PARK 9700 14.5 17.1 85 18.5 24.2 76 HOBBS PARK 10100 13.6 16.7 81 14.2 14.6 97 LITTLE WARM 9370 8.6 12.5 69 11.6 14.9 78 SOUTH PASS 9040 13.6 17.6 77 15.1 20.4 74 ST. LAWRENCE ALT 8620 6.4 7.3 88 9.4 10.3 91 TOGWOTEE PASS 9580 23.9 26.6 90 24.8 26.7 93 TOWNSEND CREEK 8700 9.7 9.7 100 12.9 13.3 97 ----- ----- Basin wide percent of average 88 89 BIGHORN BASIN BALD MTN. 9380 19.2 21.8 88 18.0 19.1 94 BEAR TRAP MEADOW 8200 6.0 4.7 128 8.9 9.4 95 BLACKWATER 9780 26.3 26.8 98 23.1 22.4 103 BONE SPRINGS DIV 9350 18.1 17.6 103 17.2 16.3 106 EVENING STAR 9200 29.9 31.9 94 32.7 27.4 119 GRAVE SPRINGS 8550 6.6 10.6 62 8.3 11.2 74 KIRWIN 9550 12.2 12.2 100 13.7 12.6 109 MARQUETTE 8760 11.9 10.5 113 14.1 11.5 123 MIDDLE POWDER 7760 8.6 13.8 62 7.8 13.9 56 OWL CREEK 8975 5.1 5.2 98 6.6 6.9 96 POWDER RIVER PASS 9480 10.3 11.8 87 13.0 13.9 94 SHELL CREEK 9580 15.5 16.0 97 15.0 14.9 101 SYLVAN LAKE 8420 20.2 24.1 84 23.9 22.7 105 SYLVAN ROAD 7120 12.1 12.2 99 18.0 19.0 95 TIMBER CREEK 7950 5.4 5.7 95 7.6 8.7 87 YOUNTS PEAK 8350 16.8 18.0 93 17.0 17.4 98 ----- ----- Basin wide percent of average 92 99 SHOSHONE RIVER BLACKWATER 9780 26.3 26.8 98 23.1 22.4 103 EVENING STAR 9200 29.9 31.9 94 32.7 27.4 119 KIRWIN 9550 12.2 12.2 100 13.7 12.6 109 MARQUETTE 8760 11.9 10.5 113 14.1 11.5 123 SYLVAN LAKE 8420 20.2 24.1 84 23.9 22.7 105 SYLVAN ROAD 7120 12.1 12.2 99 18.0 19.0 95 YOUNTS PEAK 8350 16.8 18.0 93 17.0 17.4 98 ----- ----- Basin wide percent of average 95 107 POWDER-TONGUE BEAR TRAP MEADOW 8200 6.0 4.7 128 8.9 9.4 95 BIG GOOSE 7990 11.6 12.3 94 14.2 10.4 137 BONE SPRINGS DIV 9350 18.1 17.6 103 17.2 16.3 106 BURGESS JUNCTION 7880 12.2 13.1 93 13.5 13.6 99 CLOUD PEAK RESERVOIR 9860 16.2 15.2 107 15.0 14.7 102 DOME LAKE 8880 12.9 13.9 93 15.8 14.8 107 GRAVE SPRINGS 8550 6.6 10.6 62 8.3 11.2 74 HANSEN SAWMILL 8360 7.9 6.2 127 10.7 9.4 114 MIDDLE POWDER 7760 8.6 13.8 62 7.8 13.9 56 POWDER RIVER PASS 9480 10.3 11.8 87 13.0 13.9 94 SUCKER CREEK 8880 14.0 13.4 104 16.2 15.2 107 TIE CREEK 6870 5.7 5.4 106 13.5 11.5 117 ----- ----- Basin wide percent of average 94 100 BELLE FOURCHE BLIND PARK 6890 4.4 7.7 57 10.3 12.4 83 COLE CANYON 5910 .7 -M * 7.4 -M * NORTH RAPID CREEK 6130 -M 8.8 * 8.5 9.8 87 ----- ----- Basin wide percent of average 57* 85 UPPER N. PLATTE RIVER COLUMBINE 9400 21.3 24.7 86 25.5 27.0 94 DIVIDE PEAK 8800 21.4 20.8 103 21.8 22.3 98 ELK RIVER 8700 16.1 19.6 82 19.9 21.1 94 JOE WRIGHT 10120 24.9 23.5 106 29.6 27.2 109 NORTH FRENCH CREEK 10100 32.1 32.4 99 31.0 26.9 115 OLD BATTLE 10000 30.9 34.5 90 34.8 37.0 94 SAGE CREEK BASIN 7850 7.7 12.1 64 12.9 13.0 99 SOUTH BRUSH CREEK 8400 11.8 13.3 89 18.3 18.0 102 TOWER 10500 44.6 49.2 91 -M 41.4 * WEBBER SPRINGS 9200 20.7 26.1 79 26.3 28.7 92 WILLOW CREEK PASS 9540 16.2 13.5 120 14.7 14.1 104 ----- ----- Basin wide percent of average 92 100 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 18.4 26.3 70 22.0 24.2 91 CASPER MTN. 7900 14.7 16.6 89 12.7 16.6 77 DEADMAN HILL 10220 15.0 18.2 82 18.7 18.7 100 DEER PARK 9700 14.5 17.1 85 18.5 24.2 76 LAPRELE CREEK 8320 7.2 10.3 70 11.4 14.3 80 RENO HILL 8400 12.7 15.8 80 14.7 17.3 85 ROACH 9700 16.9 18.3 92 20.3 20.3 100 SAND LAKE 10080 26.5 34.8 76 21.3 26.4 81 SOUTH PASS 9040 13.6 17.6 77 15.1 20.4 74 WINDY PEAK 7840 8.8 8.0 110 11.6 11.9 97 ----- ----- Basin wide percent of average 81 86 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 5.8 8.9 65 16.0 17.1 94 DIVIDE PEAK 8800 21.4 20.8 103 21.8 22.3 98 OLD BATTLE 10000 30.9 34.5 90 34.8 37.0 94 SANDSTONE RS 8150 11.6 13.5 86 18.6 20.1 93 WHISKEY PARK 8950 27.8 30.7 91 28.2 31.0 91 ----- ----- Basin wide percent of average 90 94 UPPER GREEN RIVER BIG SANDY OPENING 9100 11.2 15.3 73 11.5 14.5 79 BLIND BULL SUM 8650 22.7 28.9 79 17.6 23.7 74 EAST RIM DIVIDE 7930 10.5 13.9 76 10.6 12.9 82 ELKHART PARK G.S. 9400 -M 14.0 * -M 14.5 * GROS VENTRE SUMMIT 8775 12.5 14.6 86 12.2 14.0 87 KENDALL R.S. 7740 10.1 13.7 74 13.6 15.5 88 LOOMIS PARK 8240 15.0 17.1 88 16.5 18.6 89 NEW FORK LAKE 8340 9.3 11.3 82 -M 12.3 * SNIDER BASIN 8250 12.5 14.9 84 13.8 17.3 80 SPRING CREEK DIVIDE 9000 26.2 28.4 92 24.3 28.3 86 TRIPLE PEAK 8500 22.4 25.8 87 27.2 26.6 102 ----- ----- Basin wide percent of average 83 86 LOWER GREEN RIVER HAMS FORK 7840 8.0 10.1 79 11.2 13.3 84 HEWINTA 9500 7.5 12.3 61 12.7 16.0 79 HICKERSON PARK 9150 4.3 8.3 52 8.9 9.0 99 HOLE-IN-ROCK 9150 6.8 7.3 93 9.7 8.5 114 INDIAN CREEK 9425 23.0 29.5 78 20.4 27.3 75 KELLEY R.S. 8180 12.4 17.2 72 15.1 21.9 69 STEEL CREEK PARK 10100 13.9 17.2 81 14.1 18.0 78 ----- ----- Basin wide percent of average 74 81 UPPER BEAR RIVER BUG LAKE 7950 15.3 21.7 71 16.6 20.8 80 HAYDEN FORK 9400 9.3 16.5 56 18.9 22.9 83 KELLEY R.S. 8180 12.4 17.2 72 15.1 21.9 69 LILY LAKE 9050 9.0 14.4 62 15.4 19.1 81 MONTE CRISTO 8960 13.5 30.6 44 21.8 27.7 79 SALT RIVER SUMMIT 7600 10.3 14.4 72 14.6 20.1 73 TRIAL LAKE 9960 13.0 26.3 49 17.2 27.0 64 ----- ----- Basin wide percent of average 59 75 ----------------------------------------------------------------------------- -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.