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 6 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 8.9 10.8 82 23.3 24.7 94 COTTONWOOD CREEK 7670 26.5 18.3 145 38.2 32.5 118 GRAND TARGHEE 9260 55.7 -M * 42.1 -M * GRANITE CREEK 6770 11.1 11.5 97 25.0 22.7 110 GRASSY LAKE 7265 32.0 31.7 101 42.0 41.5 101 GROS VENTRE SUMMIT 8750 13.9 12.5 111 18.9 15.6 121 GUNSIGHT PASS 9820 17.9 -M * 20.3 -M * LEWIS LAKE DIVIDE 7850 37.1 33.3 111 40.8 42.2 97 PHILLIPS BENCH 8200 31.2 28.3 110 35.4 33.6 105 SALT RIVER SUMMIT 7760 13.0 9.2 141 20.4 21.9 93 SNAKE RIVER STATION 6920 12.1 10.5 115 28.1 25.9 108 SPRING CREEK DIVIDE 9000 33.2 27.9 119 32.4 30.6 106 THUMB DIVIDE 7980 20.6 13.6 151 26.4 22.4 118 TOGWOTEE PASS 9580 32.6 28.1 116 35.6 29.5 121 TWO OCEAN PLATEAU 9240 46.4 31.7 146 36.1 32.7 110 WILLOW CREEK 8380 36.2 29.5 123 47.9 38.4 125 ----- ----- Basin wide percent of average 120 109 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 27.0 26.0 104 25.2 24.0 105 BLACK BEAR 8170 43.4 39.2 111 44.3 46.5 95 CANYON 7870 15.1 10.1 150 19.4 18.1 107 FISHER CREEK 9100 41.7 37.6 111 41.7 42.6 98 MADISON PLATEAU 7750 25.6 23.1 111 31.1 30.9 101 NORTHEAST ENTRANCE 7350 3.8 5.9 64 16.6 15.1 110 PARKER PEAK 9400 33.1 24.5 135 23.3 20.0 116 SYLVAN LAKE 8420 23.4 23.0 102 29.2 25.2 116 THUMB DIVIDE 7980 20.6 13.6 151 26.4 22.4 118 TWO OCEAN PLATEAU 9240 46.4 31.7 146 36.1 32.7 110 WHISKEY CREEK 6800 18.7 13.8 136 25.9 24.6 105 WHITE MILL 8700 28.8 26.2 110 29.0 31.8 91 WOLVERINE 7650 8.4 6.2 135 15.6 15.6 100 ----- ----- Basin wide percent of average 120 104 WIND RIVER BURROUGHS CREEK 8750 19.0 12.6 151 21.4 19.8 108 COLD SPRINGS 9630 8.9 4.6 193 15.3 14.4 106 DEER PARK 9700 15.3 17.2 89 22.6 27.5 82 HOBBS PARK 10100 18.1 17.7 102 20.5 17.5 117 LITTLE WARM 9370 13.2 10.0 132 19.2 17.3 111 SOUTH PASS 9040 15.1 17.2 88 19.9 23.3 85 ST. LAWRENCE ALT 8620 6.8 5.4 126 14.5 12.6 115 TOGWOTEE PASS 9580 32.6 28.1 116 35.6 29.5 121 TOWNSEND CREEK 8700 10.9 8.0 136 17.3 16.0 108 ----- ----- Basin wide percent of average 116 105 BIGHORN BASIN BALD MTN. 9380 21.0 23.5 89 18.9 21.9 86 BEAR TRAP MEADOW 8200 5.0 1.9 263 12.2 11.4 107 BLACKWATER 9780 31.1 28.7 108 28.6 25.3 113 BONE SPRINGS DIV 9350 18.5 17.8 104 17.7 18.9 94 EVENING STAR 9200 33.5 33.2 101 37.3 30.5 122 GRAVE SPRINGS 8550 9.2 10.4 88 12.4 13.6 91 KIRWIN 9550 15.7 12.7 124 19.1 14.7 130 MARQUETTE 8760 8.7 10.7 81 12.5 14.3 87 MIDDLE POWDER 7760 11.7 13.6 86 12.8 16.3 79 OWL CREEK 8975 4.1 3.6 114 9.9 8.6 115 POWDER RIVER PASS 9480 12.8 9.8 131 18.6 16.3 114 SHELL CREEK 9580 18.9 16.6 114 19.1 17.4 110 SYLVAN LAKE 8420 23.4 23.0 102 29.2 25.2 116 SYLVAN ROAD 7120 5.5 7.0 79 23.6 20.9 113 TIMBER CREEK 7950 4.6 4.5 102 11.8 11.0 107 YOUNTS PEAK 8350 21.0 17.8 118 19.9 19.2 104 ----- ----- Basin wide percent of average 104 106 SHOSHONE RIVER BLACKWATER 9780 31.1 28.7 108 28.6 25.3 113 EVENING STAR 9200 33.5 33.2 101 37.3 30.5 122 KIRWIN 9550 15.7 12.7 124 19.1 14.7 130 MARQUETTE 8760 8.7 10.7 81 12.5 14.3 87 SYLVAN LAKE 8420 23.4 23.0 102 29.2 25.2 116 SYLVAN ROAD 7120 5.5 7.0 79 23.6 20.9 113 YOUNTS PEAK 8350 21.0 17.8 118 19.9 19.2 104 ----- ----- Basin wide percent of average 104 113 POWDER-TONGUE BEAR TRAP MEADOW 8200 5.0 1.9 263 12.2 11.4 107 BIG GOOSE 7990 10.4 11.0 95 16.0 13.5 119 BONE SPRINGS DIV 9350 18.5 17.8 104 17.7 18.9 94 BURGESS JUNCTION 7880 13.0 12.6 103 15.6 15.9 98 CLOUD PEAK RESERVOIR 9860 19.5 16.0 122 21.0 17.8 118 DOME LAKE 8880 12.2 12.6 97 19.0 17.4 109 GRAVE SPRINGS 8550 9.2 10.4 88 12.4 13.6 91 HANSEN SAWMILL 8360 3.2 4.2 76 13.0 11.4 114 MIDDLE POWDER 7760 11.7 13.6 86 12.8 16.3 79 POWDER RIVER PASS 9480 12.8 9.8 131 18.6 16.3 114 SUCKER CREEK 8880 15.7 12.2 129 20.7 18.0 115 TIE CREEK 6870 2.6 3.4 76 17.4 14.0 124 ----- ----- Basin wide percent of average 107 106 BELLE FOURCHE BLIND PARK 6890 -M 3.4 * 17.3 14.7 118 COLE CANYON 5910 3.4 3.2 106 15.1 10.1 150 NORTH RAPID CREEK 6130 .0 2.4 0 16.9 11.8 143 ----- ----- Basin wide percent of average 61 135 UPPER N. PLATTE RIVER COLUMBINE 9160 16.8 19.1 88 32.9 29.6 111 DIVIDE PEAK 8880 25.9 17.9 145 33.5 24.8 135 ELK RIVER 8700 11.1 13.0 85 25.7 23.5 109 JOE WRIGHT 10120 27.6 25.1 110 34.8 30.8 113 NORTH FRENCH CREEK 10130 40.8 34.5 118 39.6 30.4 130 OLD BATTLE 10000 41.5 37.3 111 47.2 40.6 116 SAGE CREEK BASIN 7850 8.0 10.4 77 19.5 14.4 135 SOUTH BRUSH CREEK 8440 8.5 9.9 86 22.7 20.7 110 TOWER 10500 52.1 52.4 99 50.5 46.0 110 WEBBER SPRINGS 9250 24.0 23.7 101 35.8 31.7 113 WILLOW CREEK PASS 9540 13.6 13.8 99 15.8 16.1 98 ----- ----- Basin wide percent of average 105 116 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 26.5 27.5 96 27.9 27.7 101 CASPER MTN. 7900 13.4 16.1 83 17.6 20.3 87 DEADMAN HILL 10220 23.0 19.6 117 23.7 21.5 110 DEER PARK 9700 15.3 17.2 89 22.6 27.5 82 LAPRELE CREEK 8375 8.0 6.1 131 16.8 17.0 99 RENO HILL 8400 14.7 13.6 108 21.4 20.9 102 ROACH 9700 17.8 17.6 101 24.2 23.0 105 SAND LAKE 10050 37.5 37.0 101 36.6 30.1 122 SOUTH PASS 9040 15.1 17.2 88 19.9 23.3 85 WINDY PEAK 7900 8.2 3.9 210 14.9 14.0 106 ----- ----- Basin wide percent of average 102 100 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 3.5 0 23.0 19.0 121 DIVIDE PEAK 8880 25.9 17.9 145 33.5 24.8 135 OLD BATTLE 10000 41.5 37.3 111 47.2 40.6 116 SANDSTONE RS 8150 10.8 7.9 137 25.4 22.3 114 WHISKEY PARK 8950 32.3 30.0 108 40.8 34.6 118 ----- ----- Basin wide percent of average 114 120 UPPER GREEN RIVER BIG SANDY OPENING 9080 12.9 12.4 104 16.4 16.3 101 BLIND BULL SUM 8650 31.8 27.2 117 24.9 25.6 97 EAST RIM DIVIDE 7930 3.7 12.3 30 14.7 14.2 104 ELKHART PARK G.S. 9400 14.8 12.1 122 18.8 16.4 115 GROS VENTRE SUMMIT 8750 13.9 12.5 111 18.9 15.6 121 GUNSIGHT PASS 9820 17.9 -M * 20.3 -M * KENDALL R.S. 7740 4.9 8.4 58 17.0 16.8 101 LOOMIS PARK 8240 12.3 13.2 93 22.0 20.3 108 NEW FORK LAKE 8340 8.5 7.3 116 14.0 13.7 102 SNIDER BASIN 8060 11.6 11.5 101 17.9 18.8 95 SPRING CREEK DIVIDE 9000 33.2 27.9 119 32.4 30.6 106 TRIPLE PEAK 8500 23.7 22.3 106 32.4 29.1 111 ----- ----- Basin wide percent of average 103 106 LOWER GREEN RIVER HAMS FORK 7840 4.5 4.7 96 15.6 15.1 103 HEWINTA 9519 2.4 8.0 30 17.3 18.2 95 HICKERSON PARK 9145 2.2 4.7 47 13.4 10.5 128 HOLE-IN-ROCK 9150 1.8 3.9 46 12.8 10.1 127 INDIAN CREEK 9425 -M 27.3 * 27.0 29.9 90 KELLEY R.S. 8180 14.4 12.8 112 22.0 24.0 92 STEEL CREEK PARK 10200 17.3 18.9 92 21.0 20.7 101 ----- ----- Basin wide percent of average 80 100 UPPER BEAR RIVER BUG LAKE 7950 16.2 16.2 100 22.0 22.8 96 HAYDEN FORK 9212 8.4 11.5 73 27.4 25.6 107 KELLEY R.S. 8180 14.4 12.8 112 22.0 24.0 92 LILY LAKE 9156 9.5 9.8 97 21.6 21.5 100 MONTE CRISTO 8960 26.4 27.0 98 32.0 30.9 104 SALT RIVER SUMMIT 7760 13.0 9.2 141 20.4 21.9 93 TRIAL LAKE 9992 26.0 26.0 100 29.8 30.0 99 ----- ----- Basin wide percent of average 101 99 ----------------------------------------------------------------------------- -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.