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 SATURDAY: MAY 9 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 8.2 9.6 85 24.2 25.0 97 COTTONWOOD CREEK 7670 25.6 17.1 150 38.5 32.9 117 GRAND TARGHEE 9260 55.6 -M * 42.3 -M * GRANITE CREEK 6770 9.7 10.5 92 25.4 23.0 110 GRASSY LAKE 7265 30.5 30.3 101 42.5 41.9 101 GROS VENTRE SUMMIT 8750 12.8 11.8 108 19.2 15.8 122 GUNSIGHT PASS 9820 18.5 -M * 20.6 -M * LEWIS LAKE DIVIDE 7850 37.2 32.2 116 41.3 42.6 97 PHILLIPS BENCH 8200 30.7 27.2 113 35.8 34.0 105 SALT RIVER SUMMIT 7760 11.6 8.0 145 20.3 22.2 91 SNAKE RIVER STATION 6920 11.4 9.1 125 28.5 26.2 109 SPRING CREEK DIVIDE 9000 33.1 27.2 122 32.6 30.9 106 THUMB DIVIDE 7980 20.5 12.5 164 26.8 22.7 118 TOGWOTEE PASS 9580 33.1 28.1 118 36.0 29.9 120 TWO OCEAN PLATEAU 9240 47.6 31.5 151 36.9 33.1 111 WILLOW CREEK 8380 35.4 28.5 124 48.2 39.0 124 ----- ----- Basin wide percent of average 122 109 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 28.3 25.9 109 26.4 24.4 108 BLACK BEAR 8170 44.2 38.5 115 44.8 47.0 95 CANYON 7870 15.1 9.1 166 19.9 18.3 109 FISHER CREEK 9100 43.9 37.7 116 43.6 43.0 101 MADISON PLATEAU 7750 25.5 22.2 115 31.6 31.2 101 NORTHEAST ENTRANCE 7350 3.5 5.4 65 17.3 15.4 112 PARKER PEAK 9400 33.9 24.5 138 23.9 20.4 117 SYLVAN LAKE 8420 23.9 22.3 107 29.9 25.6 117 THUMB DIVIDE 7980 20.5 12.5 164 26.8 22.7 118 TWO OCEAN PLATEAU 9240 47.6 31.5 151 36.9 33.1 111 WHISKEY CREEK 6800 18.3 12.7 144 26.4 24.9 106 WHITE MILL 8700 30.6 25.9 118 30.7 32.2 95 WOLVERINE 7650 7.9 5.4 146 16.4 15.9 103 ----- ----- Basin wide percent of average 125 106 WIND RIVER BURROUGHS CREEK 8750 18.9 11.8 160 21.8 20.1 108 COLD SPRINGS 9630 8.0 4.4 182 15.5 14.8 105 DEER PARK 9700 15.2 16.5 92 23.0 27.8 83 HOBBS PARK 10100 18.1 17.4 104 20.8 18.0 116 LITTLE WARM 9370 13.2 9.3 142 19.6 17.7 111 SOUTH PASS 9040 14.2 16.3 87 20.1 23.7 85 ST. LAWRENCE ALT 8620 -M 5.1 * -M 12.9 * TOGWOTEE PASS 9580 33.1 28.1 118 36.0 29.9 120 TOWNSEND CREEK 8700 9.6 7.4 130 17.3 16.4 105 ----- ----- Basin wide percent of average 117 103 BIGHORN BASIN BALD MTN. 9380 21.8 23.5 93 19.3 22.4 86 BEAR TRAP MEADOW 8200 3.9 1.6 244 12.4 11.7 106 BLACKWATER 9780 32.3 28.7 113 29.5 25.7 115 BONE SPRINGS DIV 9350 19.0 17.4 109 18.3 19.3 95 EVENING STAR 9200 35.0 33.3 105 38.9 31.0 125 GRAVE SPRINGS 8550 8.4 9.6 88 12.4 14.0 89 KIRWIN 9550 15.6 12.4 126 19.3 15.0 129 MARQUETTE 8760 8.3 10.2 81 12.8 14.8 86 MIDDLE POWDER 7760 10.9 12.8 85 13.0 16.7 78 OWL CREEK 8975 2.4 3.3 73 10.1 8.9 113 POWDER RIVER PASS 9480 13.2 9.4 140 19.2 16.7 115 SHELL CREEK 9580 19.6 16.9 116 19.9 17.8 112 SYLVAN LAKE 8420 23.9 22.3 107 29.9 25.6 117 SYLVAN ROAD 7120 4.7 5.6 84 24.4 21.2 115 TIMBER CREEK 7950 3.7 3.6 103 12.0 11.5 104 YOUNTS PEAK 8350 21.2 17.2 123 20.4 19.5 105 ----- ----- Basin wide percent of average 107 107 SHOSHONE RIVER BLACKWATER 9780 32.3 28.7 113 29.5 25.7 115 EVENING STAR 9200 35.0 33.3 105 38.9 31.0 125 KIRWIN 9550 15.6 12.4 126 19.3 15.0 129 MARQUETTE 8760 8.3 10.2 81 12.8 14.8 86 SYLVAN LAKE 8420 23.9 22.3 107 29.9 25.6 117 SYLVAN ROAD 7120 4.7 5.6 84 24.4 21.2 115 YOUNTS PEAK 8350 21.2 17.2 123 20.4 19.5 105 ----- ----- Basin wide percent of average 109 115 POWDER-TONGUE BEAR TRAP MEADOW 8200 3.9 1.6 244 12.4 11.7 106 BIG GOOSE 7990 10.1 10.4 97 16.1 13.9 116 BONE SPRINGS DIV 9350 19.0 17.4 109 18.3 19.3 95 BURGESS JUNCTION 7880 12.7 12.0 106 15.8 16.2 98 CLOUD PEAK RESERVOIR 9860 19.9 15.6 128 21.2 18.3 116 DOME LAKE 8880 12.1 12.0 101 19.4 17.8 109 GRAVE SPRINGS 8550 8.4 9.6 88 12.4 14.0 89 HANSEN SAWMILL 8360 1.9 3.7 51 13.1 11.7 112 MIDDLE POWDER 7760 10.9 12.8 85 13.0 16.7 78 POWDER RIVER PASS 9480 13.2 9.4 140 19.2 16.7 115 SUCKER CREEK 8880 15.4 11.7 132 21.0 18.5 114 TIE CREEK 6870 1.7 2.6 65 17.5 14.4 122 ----- ----- Basin wide percent of average 109 105 BELLE FOURCHE BLIND PARK 6890 -M 2.3 * 17.8 15.0 119 COLE CANYON 5910 1.8 2.2 82 15.1 10.4 145 NORTH RAPID CREEK 6130 .0 1.7 0 17.1 12.1 141 ----- ----- Basin wide percent of average 46 133 UPPER N. PLATTE RIVER COLUMBINE 9160 12.7 17.5 73 32.8 30.0 109 DIVIDE PEAK 8880 23.2 16.5 141 33.4 25.1 133 ELK RIVER 8700 7.5 11.4 66 25.7 23.8 108 JOE WRIGHT 10120 26.9 24.9 108 34.9 31.3 112 NORTH FRENCH CREEK 10130 40.3 34.4 117 39.7 30.9 128 OLD BATTLE 10000 41.0 37.1 111 47.3 41.1 115 SAGE CREEK BASIN 7850 4.3 9.6 45 19.4 14.6 133 SOUTH BRUSH CREEK 8440 5.9 9.0 66 22.7 21.1 108 TOWER 10500 50.6 52.4 97 50.7 46.6 109 WEBBER SPRINGS 9250 22.3 22.3 100 35.7 32.1 111 WILLOW CREEK PASS 9540 12.2 13.3 92 15.8 16.4 96 ----- ----- Basin wide percent of average 99 114 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 25.2 26.5 95 28.2 28.1 100 CASPER MTN. 7900 11.8 15.0 79 17.5 20.7 85 DEADMAN HILL 10220 21.7 19.4 112 23.7 22.0 108 DEER PARK 9700 15.2 16.5 92 23.0 27.8 83 LAPRELE CREEK 8375 6.5 5.3 123 16.7 17.4 96 RENO HILL 8400 13.3 12.5 106 21.2 21.4 99 ROACH 9700 16.1 16.5 98 24.1 23.4 103 SAND LAKE 10050 36.8 36.8 100 36.8 30.6 120 SOUTH PASS 9040 14.2 16.3 87 20.1 23.7 85 WINDY PEAK 7900 5.5 3.2 172 14.9 14.4 103 ----- ----- Basin wide percent of average 99 99 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 2.6 0 22.9 19.2 119 DIVIDE PEAK 8880 23.2 16.5 141 33.4 25.1 133 OLD BATTLE 10000 41.0 37.1 111 47.3 41.1 115 SANDSTONE RS 8150 7.7 6.6 117 25.3 22.7 111 WHISKEY PARK 8950 29.2 29.2 100 40.7 35.0 116 ----- ----- Basin wide percent of average 110 119 UPPER GREEN RIVER BIG SANDY OPENING 9080 11.8 11.5 103 16.6 16.6 100 BLIND BULL SUM 8650 32.4 26.7 121 25.3 25.9 98 EAST RIM DIVIDE 7930 1.8 11.5 16 14.6 14.4 101 ELKHART PARK G.S. 9400 15.0 11.4 132 18.8 16.7 113 GROS VENTRE SUMMIT 8750 12.8 11.8 108 19.2 15.8 122 GUNSIGHT PASS 9820 18.5 -M * 20.6 -M * KENDALL R.S. 7740 3.3 7.1 46 17.2 17.0 101 LOOMIS PARK 8240 11.8 12.2 97 22.3 20.5 109 NEW FORK LAKE 8340 7.1 6.3 113 14.0 14.0 100 SNIDER BASIN 8060 10.4 10.5 99 18.1 19.0 95 SPRING CREEK DIVIDE 9000 33.1 27.2 122 32.6 30.9 106 TRIPLE PEAK 8500 23.7 20.9 113 33.4 29.5 113 ----- ----- Basin wide percent of average 104 105 LOWER GREEN RIVER HAMS FORK 7840 1.9 3.6 53 15.9 15.4 103 HEWINTA 9519 .0 6.9 0 17.2 18.5 93 HICKERSON PARK 9145 -M 3.9 * 13.2 10.8 122 HOLE-IN-ROCK 9150 .3 3.2 9 12.8 10.3 124 INDIAN CREEK 9425 -M 26.4 * 27.3 30.2 90 KELLEY R.S. 8180 13.4 11.8 114 22.1 24.2 91 STEEL CREEK PARK 10200 16.3 18.9 86 21.0 21.0 100 ----- ----- Basin wide percent of average 72 99 UPPER BEAR RIVER BUG LAKE 7950 14.4 14.7 98 21.9 23.1 95 HAYDEN FORK 9212 4.8 10.3 47 27.2 26.0 105 KELLEY R.S. 8180 13.4 11.8 114 22.1 24.2 91 LILY LAKE 9156 6.2 8.8 70 21.5 21.9 98 MONTE CRISTO 8960 24.0 25.9 93 31.9 31.3 102 SALT RIVER SUMMIT 7760 11.6 8.0 145 20.3 22.2 91 TRIAL LAKE 9992 24.6 25.4 97 29.7 30.4 98 ----- ----- Basin wide percent of average 94 97 ----------------------------------------------------------------------------- -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 1961-90. 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.