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 SUNDAY: MAY 10 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 7.4 9.1 81 24.1 25.1 96 COTTONWOOD CREEK 7670 24.9 16.6 150 38.5 33.1 116 GRAND TARGHEE 9260 55.5 -M * 42.3 -M * GRANITE CREEK 6770 9.3 10.1 92 25.4 23.1 110 GRASSY LAKE 7265 30.1 29.8 101 42.7 42.0 102 GROS VENTRE SUMMIT 8750 13.1 11.6 113 19.3 15.9 121 GUNSIGHT PASS 9820 18.4 -M * 20.6 -M * LEWIS LAKE DIVIDE 7850 37.0 31.8 116 41.3 42.7 97 PHILLIPS BENCH 8200 30.4 26.8 113 35.8 34.1 105 SALT RIVER SUMMIT 7760 11.1 7.6 146 20.4 22.3 91 SNAKE RIVER STATION 6920 10.8 8.7 124 28.5 26.3 108 SPRING CREEK DIVIDE 9000 32.8 26.9 122 32.6 31.0 105 THUMB DIVIDE 7980 20.2 12.1 167 26.8 22.8 118 TOGWOTEE PASS 9580 33.0 28.0 118 36.1 30.0 120 TWO OCEAN PLATEAU 9240 47.7 31.5 151 36.9 33.3 111 WILLOW CREEK 8380 34.9 28.1 124 48.3 39.1 124 ----- ----- Basin wide percent of average 123 109 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 28.4 25.9 110 26.3 24.5 107 BLACK BEAR 8170 43.8 38.3 114 44.8 47.1 95 CANYON 7870 15.2 8.9 171 19.9 18.4 108 FISHER CREEK 9100 44.1 37.5 118 43.6 43.2 101 MADISON PLATEAU 7750 25.5 21.9 116 31.6 31.4 101 NORTHEAST ENTRANCE 7350 2.8 5.2 54 17.3 15.5 112 PARKER PEAK 9400 33.7 24.4 138 23.9 20.5 117 SYLVAN LAKE 8420 23.7 22.1 107 29.8 25.8 116 THUMB DIVIDE 7980 20.2 12.1 167 26.8 22.8 118 TWO OCEAN PLATEAU 9240 47.7 31.5 151 36.9 33.3 111 WHISKEY CREEK 6800 18.1 12.4 146 26.4 25.0 106 WHITE MILL 8700 30.6 25.9 118 30.7 32.3 95 WOLVERINE 7650 7.4 5.1 145 16.4 16.0 102 ----- ----- Basin wide percent of average 126 105 WIND RIVER BURROUGHS CREEK 8750 18.8 11.6 162 21.7 20.2 107 COLD SPRINGS 9630 7.8 4.4 177 15.7 14.9 105 DEER PARK 9700 15.1 16.4 92 23.0 28.0 82 HOBBS PARK 10100 18.2 17.4 105 20.7 18.1 114 LITTLE WARM 9370 12.9 9.1 142 19.6 17.8 110 SOUTH PASS 9040 14.3 16.0 89 20.1 23.8 84 ST. LAWRENCE ALT 8620 -M 4.9 * -M 13.1 * TOGWOTEE PASS 9580 33.0 28.0 118 36.1 30.0 120 TOWNSEND CREEK 8700 9.5 7.2 132 17.3 16.5 105 ----- ----- Basin wide percent of average 118 103 BIGHORN BASIN BALD MTN. 9380 22.0 23.5 94 19.5 22.5 87 BEAR TRAP MEADOW 8200 3.4 1.6 212 12.3 11.8 104 BLACKWATER 9780 32.3 28.7 113 29.5 25.8 114 BONE SPRINGS DIV 9350 19.2 17.3 111 18.5 19.4 95 EVENING STAR 9200 34.9 33.2 105 38.9 31.1 125 GRAVE SPRINGS 8550 8.3 9.8 85 12.4 14.1 88 KIRWIN 9550 15.7 12.3 128 19.5 15.1 129 MARQUETTE 8760 8.3 10.1 82 12.8 14.9 86 MIDDLE POWDER 7760 11.2 12.7 88 13.2 16.8 79 OWL CREEK 8975 2.0 3.2 62 10.2 8.9 115 POWDER RIVER PASS 9480 13.3 9.3 143 19.2 16.9 114 SHELL CREEK 9580 19.8 16.8 118 20.0 17.9 112 SYLVAN LAKE 8420 23.7 22.1 107 29.8 25.8 116 SYLVAN ROAD 7120 3.4 5.3 64 24.4 21.3 115 TIMBER CREEK 7950 3.5 3.5 100 12.1 11.6 104 YOUNTS PEAK 8350 21.0 17.0 124 20.4 19.6 104 ----- ----- Basin wide percent of average 107 107 SHOSHONE RIVER BLACKWATER 9780 32.3 28.7 113 29.5 25.8 114 EVENING STAR 9200 34.9 33.2 105 38.9 31.1 125 KIRWIN 9550 15.7 12.3 128 19.5 15.1 129 MARQUETTE 8760 8.3 10.1 82 12.8 14.9 86 SYLVAN LAKE 8420 23.7 22.1 107 29.8 25.8 116 SYLVAN ROAD 7120 3.4 5.3 64 24.4 21.3 115 YOUNTS PEAK 8350 21.0 17.0 124 20.4 19.6 104 ----- ----- Basin wide percent of average 108 114 POWDER-TONGUE BEAR TRAP MEADOW 8200 3.4 1.6 212 12.3 11.8 104 BIG GOOSE 7990 10.3 10.3 100 16.2 14.1 115 BONE SPRINGS DIV 9350 19.2 17.3 111 18.5 19.4 95 BURGESS JUNCTION 7880 12.8 11.9 108 15.8 16.4 96 CLOUD PEAK RESERVOIR 9860 20.1 15.6 129 21.2 18.4 115 DOME LAKE 8880 11.8 11.8 100 19.5 18.0 108 GRAVE SPRINGS 8550 8.3 9.8 85 12.4 14.1 88 HANSEN SAWMILL 8360 1.7 3.7 46 13.1 11.8 111 MIDDLE POWDER 7760 11.2 12.7 88 13.2 16.8 79 POWDER RIVER PASS 9480 13.3 9.3 143 19.2 16.9 114 SUCKER CREEK 8880 15.5 11.6 134 21.0 18.6 113 TIE CREEK 6870 1.4 2.7 52 17.6 14.6 121 ----- ----- Basin wide percent of average 109 105 BELLE FOURCHE BLIND PARK 6890 -M 1.8 * 17.8 15.2 117 COLE CANYON 5910 1.2 1.8 67 15.1 10.5 144 NORTH RAPID CREEK 6130 .0 1.4 0 17.2 12.2 141 ----- ----- Basin wide percent of average 37 132 UPPER N. PLATTE RIVER COLUMBINE 9160 11.8 16.9 70 33.1 30.1 110 DIVIDE PEAK 8880 22.8 16.0 142 33.4 25.2 133 ELK RIVER 8700 6.1 10.9 56 25.8 23.9 108 JOE WRIGHT 10120 26.5 24.8 107 34.9 31.5 111 NORTH FRENCH CREEK 10130 40.1 34.3 117 39.7 31.1 128 OLD BATTLE 10000 40.9 37.0 111 47.3 41.2 115 SAGE CREEK BASIN 7850 2.4 9.3 26 19.5 14.6 134 SOUTH BRUSH CREEK 8440 4.9 8.6 57 22.8 21.2 108 TOWER 10500 50.7 52.4 97 50.8 46.8 109 WEBBER SPRINGS 9250 20.7 21.8 95 35.7 32.2 111 WILLOW CREEK PASS 9540 11.7 13.1 89 15.9 16.5 96 ----- ----- Basin wide percent of average 97 114 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 24.5 26.1 94 28.3 28.3 100 CASPER MTN. 7900 11.8 14.5 81 17.6 20.9 84 DEADMAN HILL 10220 21.4 19.2 111 23.8 22.1 108 DEER PARK 9700 15.1 16.4 92 23.0 28.0 82 LAPRELE CREEK 8375 6.0 5.1 118 16.7 17.5 95 RENO HILL 8400 13.2 12.2 108 21.3 21.6 99 ROACH 9700 15.2 16.1 94 24.2 23.6 103 SAND LAKE 10050 36.6 36.7 100 36.8 30.8 119 SOUTH PASS 9040 14.3 16.0 89 20.1 23.8 84 WINDY PEAK 7900 5.4 3.0 180 15.0 14.5 103 ----- ----- Basin wide percent of average 99 98 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 2.3 0 23.0 19.3 119 DIVIDE PEAK 8880 22.8 16.0 142 33.4 25.2 133 OLD BATTLE 10000 40.9 37.0 111 47.3 41.2 115 SANDSTONE RS 8150 6.0 6.2 97 25.4 22.8 111 WHISKEY PARK 8950 29.4 29.0 101 40.8 35.2 116 ----- ----- Basin wide percent of average 110 118 UPPER GREEN RIVER BIG SANDY OPENING 9080 11.6 11.2 104 16.7 16.7 100 BLIND BULL SUM 8650 32.3 26.5 122 25.4 26.0 98 EAST RIM DIVIDE 7930 1.2 11.2 11 14.6 14.4 101 ELKHART PARK G.S. 9400 14.6 11.1 132 18.9 16.8 112 GROS VENTRE SUMMIT 8750 13.1 11.6 113 19.3 15.9 121 GUNSIGHT PASS 9820 18.4 -M * 20.6 -M * KENDALL R.S. 7740 2.7 6.7 40 17.3 17.1 101 LOOMIS PARK 8240 11.2 11.9 94 22.3 20.6 108 NEW FORK LAKE 8340 6.5 6.0 108 14.1 14.0 101 SNIDER BASIN 8060 9.9 10.1 98 18.1 19.1 95 SPRING CREEK DIVIDE 9000 32.8 26.9 122 32.6 31.0 105 TRIPLE PEAK 8500 23.4 20.4 115 33.5 29.6 113 ----- ----- Basin wide percent of average 104 105 LOWER GREEN RIVER HAMS FORK 7840 1.3 3.3 39 15.9 15.4 103 HEWINTA 9519 .0 6.6 0 17.2 18.6 92 HICKERSON PARK 9145 .0 3.6 0 13.3 10.9 122 HOLE-IN-ROCK 9150 .3 3.0 10 12.8 10.4 123 INDIAN CREEK 9425 -M 26.1 * 27.4 30.4 90 KELLEY R.S. 8180 12.6 11.4 111 22.1 24.3 91 STEEL CREEK PARK 10200 16.2 18.9 86 21.0 21.1 100 ----- ----- Basin wide percent of average 65 99 UPPER BEAR RIVER BUG LAKE 7950 13.8 14.2 97 21.9 23.2 94 HAYDEN FORK 9212 3.6 9.9 36 27.3 26.1 105 KELLEY R.S. 8180 12.6 11.4 111 22.1 24.3 91 LILY LAKE 9156 5.2 8.5 61 21.5 22.0 98 MONTE CRISTO 8960 23.6 25.5 93 32.0 31.4 102 SALT RIVER SUMMIT 7760 11.1 7.6 146 20.4 22.3 91 TRIAL LAKE 9992 23.5 25.2 93 29.8 30.5 98 ----- ----- Basin wide percent of average 91 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.