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 WEDNESDAY: MAY 18 , 2005 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 .1 5.4 2 18.3 25.9 71 COTTONWOOD CREEK 7600 8.5 12.3 69 29.7 34.0 87 GRANITE CREEK 6770 .1 6.6 2 20.0 23.8 84 GRASSY LAKE 7265 10.5 24.3 43 30.5 43.2 71 GROS VENTRE SUMMIT 8750 7.1 8.8 81 14.4 16.6 87 LEWIS LAKE DIVIDE 7850 11.3 27.0 42 27.4 43.7 63 PHILLIPS BENCH 8200 19.9 22.3 89 29.4 35.0 84 SALT RIVER SUMMIT 7600 3.2 4.0 80 21.6 23.0 94 SNAKE RIVER STATION 6920 .3 4.7 6 16.8 27.1 62 SPRING CREEK DIVIDE 9000 23.6 23.0 103 27.8 31.8 87 THUMB DIVIDE 7980 .6 8.3 7 16.1 23.5 69 TOGWOTEE PASS 9580 19.2 26.4 73 22.6 31.0 73 TWO OCEAN PLATEAU 9240 25.6 29.7 86 23.3 34.4 68 WILLOW CREEK 8450 18.8 23.4 80 39.6 40.4 98 ----- ----- Basin wide percent of average 66 78 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 17.9 24.5 73 18.4 25.4 72 BLACK BEAR 8170 30.1 34.7 87 37.7 48.3 78 CANYON 8090 .0 6.1 0 13.2 19.2 69 FISHER CREEK 9100 25.3 35.5 71 30.3 44.5 68 MADISON PLATEAU 7750 14.4 17.6 82 25.7 32.5 79 NORTHEAST ENTRANCE 7350 .1 2.8 4 10.6 16.3 65 PARKER PEAK 9400 17.7 23.0 77 17.5 21.5 81 SYLVAN LAKE 8420 8.0 18.7 43 21.6 27.1 80 THUMB DIVIDE 7980 .6 8.3 7 16.1 23.5 69 TWO OCEAN PLATEAU 9240 25.6 29.7 86 23.3 34.4 68 WHISKEY CREEK 6800 5.0 8.3 60 20.0 25.9 77 WHITE MILL 8700 17.5 23.5 74 20.2 33.4 60 WOLVERINE 7650 .2 2.6 8 10.7 16.9 63 ----- ----- Basin wide percent of average 69 72 WIND RIVER BURROUGHS CREEK 8750 10.5 9.2 114 15.4 21.1 73 COLD SPRINGS 9630 3.1 2.9 107 14.7 15.7 94 DEER PARK 9700 26.2 15.6 168 32.1 29.1 110 HOBBS PARK 10100 19.3 15.5 125 20.9 19.1 109 LITTLE WARM 9370 7.5 6.8 110 15.7 18.6 84 SOUTH PASS 9040 17.4 12.7 137 26.8 24.5 109 ST. LAWRENCE ALT 8620 3.2 3.2 100 14.9 13.8 108 TOGWOTEE PASS 9580 19.2 26.4 73 22.6 31.0 73 TOWNSEND CREEK 8700 5.7 5.0 114 19.7 17.3 114 ----- ----- Basin wide percent of average 115 96 BIGHORN BASIN BALD MTN. 9380 21.0 21.9 96 23.1 23.5 98 BEAR TRAP MEADOW 8200 .2 .6 33 13.2 12.7 104 BLACKWATER 9780 18.1 28.1 64 19.9 27.0 74 BONE SPRINGS DIV 9350 18.2 14.8 123 23.2 20.5 113 EVENING STAR 9200 17.8 31.5 57 26.0 32.4 80 GRAVE SPRINGS 8550 4.4 6.8 65 13.3 14.7 90 KIRWIN 9550 10.7 10.0 107 15.4 16.0 96 MARQUETTE 8760 8.4 8.1 104 15.5 16.1 96 MIDDLE POWDER 7760 6.5 9.6 68 11.8 17.6 67 OWL CREEK 8975 3.1 2.0 155 12.7 9.8 130 POWDER RIVER PASS 9480 7.5 7.1 106 18.2 17.9 102 SHELL CREEK 9580 19.1 15.3 125 20.5 18.8 109 SYLVAN LAKE 8420 8.0 18.7 43 21.6 27.1 80 SYLVAN ROAD 7120 .1 2.2 5 13.7 22.0 62 TIMBER CREEK 7950 2.5 1.9 132 12.5 12.6 99 YOUNTS PEAK 8350 8.6 13.9 62 15.5 20.6 75 ----- ----- Basin wide percent of average 80 89 SHOSHONE RIVER BLACKWATER 9780 18.1 28.1 64 19.9 27.0 74 EVENING STAR 9200 17.8 31.5 57 26.0 32.4 80 KIRWIN 9550 10.7 10.0 107 15.4 16.0 96 MARQUETTE 8760 8.4 8.1 104 15.5 16.1 96 SYLVAN LAKE 8420 8.0 18.7 43 21.6 27.1 80 SYLVAN ROAD 7120 .1 2.2 5 13.7 22.0 62 YOUNTS PEAK 8350 8.6 13.9 62 15.5 20.6 75 ----- ----- Basin wide percent of average 64 79 POWDER-TONGUE BEAR TRAP MEADOW 8200 .2 .6 33 13.2 12.7 104 BIG GOOSE 7990 8.8 8.0 110 18.6 14.8 126 BONE SPRINGS DIV 9350 18.2 14.8 123 23.2 20.5 113 BURGESS JUNCTION 7880 9.1 8.9 102 17.9 17.1 105 CLOUD PEAK RESERVOIR 9860 19.8 13.5 147 22.3 19.6 114 DOME LAKE 8880 9.8 9.1 108 21.1 18.9 112 GRAVE SPRINGS 8550 4.4 6.8 65 13.3 14.7 90 HANSEN SAWMILL 8360 .5 1.8 28 15.5 12.7 122 MIDDLE POWDER 7760 6.5 9.6 68 11.8 17.6 67 POWDER RIVER PASS 9480 7.5 7.1 106 18.2 17.9 102 SUCKER CREEK 8880 14.1 9.0 157 23.2 19.6 118 TIE CREEK 6870 .2 1.1 18 19.2 15.5 124 ----- ----- Basin wide percent of average 110 108 BELLE FOURCHE BLIND PARK 6890 .0 .1 0* 13.7 16.2 85 COLE CANYON 5910 .0 2.6 0 13.5 -M * NORTH RAPID CREEK 6130 .0 .5 0* 11.3 12.8 88 ----- ----- Basin wide percent of average 0* 86 UPPER N. PLATTE RIVER COLUMBINE 9160 4.1 11.1 37 -M 30.8 * DIVIDE PEAK 8860 13.4 11.2 120 28.8 26.1 110 ELK RIVER 8700 6.4 6.5 98 26.0 24.6 106 JOE WRIGHT 10120 23.2 22.6 103 27.7 32.7 85 NORTH FRENCH CREEK 10130 30.0 31.6 95 32.4 32.2 101 OLD BATTLE 9920 41.3 33.8 122 -M 42.3 * SAGE CREEK BASIN 7850 .1 6.5 2 19.4 15.1 128 SOUTH BRUSH CREEK 8440 2.7 5.7 47 19.5 22.0 89 TOWER 10500 40.8 49.9 82 46.9 47.8 98 WEBBER SPRINGS 9250 17.5 16.1 109 32.8 33.1 99 WILLOW CREEK PASS 9540 15.0 9.8 153 16.5 17.4 95 ----- ----- Basin wide percent of average 95 100 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10220 18.5 21.1 88 24.6 29.2 84 CASPER MTN. 7850 2.4 10.4 23 17.1 22.0 78 DEADMAN HILL 10220 17.3 16.8 103 19.5 23.0 85 DEER PARK 9700 26.2 15.6 168 32.1 29.1 110 LAPRELE CREEK 8375 .0 3.1 0 14.3 18.5 77 RENO HILL 8500 5.0 8.6 58 17.0 22.7 75 ROACH 9700 13.4 12.1 111 23.0 24.6 93 SAND LAKE 10050 27.3 33.8 81 29.9 32.0 93 SOUTH PASS 9040 17.4 12.7 137 26.8 24.5 109 WINDY PEAK 7900 .8 1.4 57 11.9 15.5 77 ----- ----- Basin wide percent of average 95 90 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 .5 0* 19.6 19.9 98 DIVIDE PEAK 8860 13.4 11.2 120 28.8 26.1 110 OLD BATTLE 9920 41.3 33.8 122 -M 42.3 * SANDSTONE RS 8150 .1 3.1 3 24.2 23.5 103 WHISKEY PARK 8950 24.0 24.2 99 31.9 36.0 89 ----- ----- Basin wide percent of average 108 99 UPPER GREEN RIVER BIG SANDY OPENING 9080 12.4 7.7 161 19.8 17.4 114 BLIND BULL SUM 8900 18.6 23.6 79 20.9 26.8 78 EAST RIM DIVIDE 7930 .0 7.8 0 14.0 15.1 93 ELKHART PARK G.S. 9400 12.2 8.3 147 19.9 17.6 113 GROS VENTRE SUMMIT 8750 7.1 8.8 81 14.4 16.6 87 KENDALL R.S. 7740 .1 3.0 3 16.2 17.7 92 LOOMIS PARK 8240 5.6 8.4 67 20.5 21.3 96 NEW FORK LAKE 8340 3.7 3.1 119 15.3 14.8 103 SNIDER BASIN 8060 3.6 6.3 57 16.9 19.5 87 SPRING CREEK DIVIDE 9000 23.6 23.0 103 27.8 31.8 87 TRIPLE PEAK 8500 9.5 14.9 64 26.2 30.4 86 ----- ----- Basin wide percent of average 84 93 LOWER GREEN RIVER HAMS FORK 7840 .2 .9 22* 18.5 16.0 116 HEWINTA 9500 .0 3.8 0 16.6 19.2 86 HICKERSON PARK 9100 .0 1.7 0 14.1 11.5 123 HOLE-IN-ROCK 9150 .0 1.4 0 13.7 11.1 123 INDIAN CREEK 9425 31.2 22.1 141 31.2 31.1 100 KELLEY R.S. 8180 10.5 7.7 136 25.0 25.0 100 STEEL CREEK PARK 10100 19.3 17.0 114 21.0 21.8 96 ----- ----- Basin wide percent of average 112 103 UPPER BEAR RIVER BUG LAKE 7950 15.4 9.4 164 28.9 23.9 121 HAYDEN FORK 9100 5.1 6.3 81 30.7 27.0 114 KELLEY R.S. 8180 10.5 7.7 136 25.0 25.0 100 LILY LAKE 9050 6.1 5.4 113 23.2 22.7 102 MONTE CRISTO 8960 29.2 20.9 140 37.7 32.3 117 SALT RIVER SUMMIT 7600 3.2 4.0 80 21.6 23.0 94 TRIAL LAKE 9960 33.6 21.7 155 37.7 31.5 120 ----- ----- Basin wide percent of average 137 110 ----------------------------------------------------------------------------- -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.