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 13 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 5.5 7.9 70 24.2 25.3 96 COTTONWOOD CREEK 7670 22.7 15.3 148 38.5 33.5 115 GRAND TARGHEE 9260 54.1 -M * 43.0 -M * GRANITE CREEK 6770 7.7 9.0 86 25.4 23.3 109 GRASSY LAKE 7265 27.5 28.3 97 42.6 42.4 100 GROS VENTRE SUMMIT 8750 11.9 10.8 110 19.3 16.1 120 GUNSIGHT PASS 9820 18.3 -M * 20.6 -M * LEWIS LAKE DIVIDE 7850 35.9 30.5 118 41.5 43.1 96 PHILLIPS BENCH 8200 28.5 25.5 112 35.8 34.4 104 SALT RIVER SUMMIT 7760 8.8 6.2 142 20.3 22.6 90 SNAKE RIVER STATION 6920 7.8 7.2 108 28.7 26.6 108 SPRING CREEK DIVIDE 9000 31.5 25.9 122 32.6 31.3 104 THUMB DIVIDE 7980 18.0 10.9 165 27.0 23.1 117 TOGWOTEE PASS 9580 33.1 27.8 119 36.3 30.4 119 TWO OCEAN PLATEAU 9240 48.2 31.1 155 37.4 33.7 111 WILLOW CREEK 8380 32.5 26.8 121 48.3 39.7 122 ----- ----- Basin wide percent of average 121 108 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 28.5 25.7 111 26.8 24.9 108 BLACK BEAR 8170 43.4 37.5 116 44.9 47.6 94 CANYON 7870 14.4 8.0 180 20.1 18.7 107 FISHER CREEK 9100 44.9 37.3 120 44.4 43.7 102 MADISON PLATEAU 7750 24.6 20.9 118 31.6 31.7 100 NORTHEAST ENTRANCE 7350 1.6 4.4 36 17.7 15.8 112 PARKER PEAK 9400 33.3 24.2 138 24.2 20.9 116 SYLVAN LAKE 8420 22.8 21.3 107 30.1 26.2 115 THUMB DIVIDE 7980 18.0 10.9 165 27.0 23.1 117 TWO OCEAN PLATEAU 9240 48.2 31.1 155 37.4 33.7 111 WHISKEY CREEK 6800 17.1 11.3 151 26.5 25.3 105 WHITE MILL 8700 31.2 25.5 122 31.2 32.7 95 WOLVERINE 7650 5.2 4.2 124 16.6 16.4 101 ----- ----- Basin wide percent of average 127 105 WIND RIVER BURROUGHS CREEK 8750 18.1 11.1 163 21.8 20.5 106 COLD SPRINGS 9630 6.4 4.0 160 15.5 15.2 102 DEER PARK 9700 14.6 17.0 86 22.9 28.4 81 HOBBS PARK 10100 17.7 17.3 102 20.9 18.5 113 LITTLE WARM 9370 11.9 8.5 140 19.6 18.1 108 SOUTH PASS 9040 13.2 15.1 87 20.1 24.2 83 ST. LAWRENCE ALT 8620 -M 4.5 * -M 13.4 * TOGWOTEE PASS 9580 33.1 27.8 119 36.3 30.4 119 TOWNSEND CREEK 8700 8.1 6.5 125 17.4 16.9 103 ----- ----- Basin wide percent of average 115 101 BIGHORN BASIN BALD MTN. 9380 22.0 23.5 94 19.6 23.0 85 BEAR TRAP MEADOW 8200 1.0 1.1 91 12.3 12.1 102 BLACKWATER 9780 32.6 28.8 113 30.0 26.2 115 BONE SPRINGS DIV 9350 18.9 16.9 112 18.6 19.9 93 EVENING STAR 9200 34.5 32.9 105 39.3 31.5 125 GRAVE SPRINGS 8550 7.5 9.2 82 12.6 14.4 88 KIRWIN 9550 15.1 11.9 127 19.6 15.5 126 MARQUETTE 8760 7.7 9.6 80 12.8 15.3 84 MIDDLE POWDER 7760 10.3 11.9 87 13.1 17.1 77 OWL CREEK 8975 .2 2.8 7 10.2 9.2 111 POWDER RIVER PASS 9480 12.7 8.8 144 19.1 17.3 110 SHELL CREEK 9580 19.4 16.7 116 19.9 18.3 109 SYLVAN LAKE 8420 22.8 21.3 107 30.1 26.2 115 SYLVAN ROAD 7120 .4 3.7 11 24.8 21.6 115 TIMBER CREEK 7950 1.3 2.8 46 12.2 12.0 102 YOUNTS PEAK 8350 20.4 16.5 124 20.6 20.0 103 ----- ----- Basin wide percent of average 104 105 SHOSHONE RIVER BLACKWATER 9780 32.6 28.8 113 30.0 26.2 115 EVENING STAR 9200 34.5 32.9 105 39.3 31.5 125 KIRWIN 9550 15.1 11.9 127 19.6 15.5 126 MARQUETTE 8760 7.7 9.6 80 12.8 15.3 84 SYLVAN LAKE 8420 22.8 21.3 107 30.1 26.2 115 SYLVAN ROAD 7120 .4 3.7 11 24.8 21.6 115 YOUNTS PEAK 8350 20.4 16.5 124 20.6 20.0 103 ----- ----- Basin wide percent of average 107 113 POWDER-TONGUE BEAR TRAP MEADOW 8200 1.0 1.1 91 12.3 12.1 102 BIG GOOSE 7990 9.7 9.7 100 16.3 14.5 112 BONE SPRINGS DIV 9350 18.9 16.9 112 18.6 19.9 93 BURGESS JUNCTION 7880 12.2 11.1 110 15.9 16.7 95 CLOUD PEAK RESERVOIR 9860 19.5 15.4 127 21.5 18.9 114 DOME LAKE 8880 10.9 11.2 97 19.5 18.4 106 GRAVE SPRINGS 8550 7.5 9.2 82 12.6 14.4 88 HANSEN SAWMILL 8360 .1 3.0 3 13.1 12.1 108 MIDDLE POWDER 7760 10.3 11.9 87 13.1 17.1 77 POWDER RIVER PASS 9480 12.7 8.8 144 19.1 17.3 110 SUCKER CREEK 8880 15.1 11.0 137 21.2 19.1 111 TIE CREEK 6870 .0 2.1 0 17.6 15.0 117 ----- ----- Basin wide percent of average 106 103 BELLE FOURCHE BLIND PARK 6890 -M .8 * 17.8 15.6 114 COLE CANYON 5910 .0 1.2 0 15.3 10.9 140 NORTH RAPID CREEK 6130 .0 .9 0 17.3 12.5 138 ----- ----- Basin wide percent of average 0 129 UPPER N. PLATTE RIVER COLUMBINE 9160 8.5 15.1 56 33.3 30.4 110 DIVIDE PEAK 8880 20.2 14.5 139 33.5 25.6 131 ELK RIVER 8700 1.0 9.2 11 25.9 24.2 107 JOE WRIGHT 10120 24.5 24.4 100 35.0 32.0 109 NORTH FRENCH CREEK 10130 38.7 33.8 114 39.7 31.6 126 OLD BATTLE 10000 39.7 36.4 109 47.4 41.7 114 SAGE CREEK BASIN 7850 .2 8.4 2 19.4 14.8 131 SOUTH BRUSH CREEK 8440 1.5 7.6 20 22.9 21.5 107 TOWER 10500 49.0 52.1 94 50.9 47.3 108 WEBBER SPRINGS 9250 18.8 20.0 94 35.9 32.6 110 WILLOW CREEK PASS 9540 10.1 12.3 82 16.1 16.8 96 ----- ----- Basin wide percent of average 91 113 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 22.6 24.8 91 28.3 28.7 99 CASPER MTN. 7900 10.3 13.2 78 17.5 21.3 82 DEADMAN HILL 10220 20.0 18.7 107 23.8 22.5 106 DEER PARK 9700 14.6 17.0 86 22.9 28.4 81 LAPRELE CREEK 8375 4.6 4.3 107 17.0 17.9 95 RENO HILL 8400 11.9 10.9 109 21.4 22.1 97 ROACH 9700 13.2 14.8 89 24.3 24.0 101 SAND LAKE 10050 35.7 36.2 99 36.9 31.3 118 SOUTH PASS 9040 13.2 15.1 87 20.1 24.2 83 WINDY PEAK 7900 3.6 2.3 157 15.6 14.8 105 ----- ----- Basin wide percent of average 95 97 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 1.5 0 22.9 19.6 117 DIVIDE PEAK 8880 20.2 14.5 139 33.5 25.6 131 OLD BATTLE 10000 39.7 36.4 109 47.4 41.7 114 SANDSTONE RS 8150 .9 4.9 18 25.4 23.1 110 WHISKEY PARK 8950 27.1 27.9 97 40.8 35.6 115 ----- ----- Basin wide percent of average 103 117 UPPER GREEN RIVER BIG SANDY OPENING 9080 10.0 10.2 98 16.7 16.9 99 BLIND BULL SUM 8650 32.1 25.8 124 25.2 26.3 96 EAST RIM DIVIDE 7930 .0 10.3 0 14.6 14.7 99 ELKHART PARK G.S. 9400 13.5 10.3 131 18.8 17.1 110 GROS VENTRE SUMMIT 8750 11.9 10.8 110 19.3 16.1 120 GUNSIGHT PASS 9820 18.3 -M * 20.6 -M * KENDALL R.S. 7740 .3 5.2 6 17.2 17.3 99 LOOMIS PARK 8240 10.0 10.8 93 22.3 20.9 107 NEW FORK LAKE 8340 4.5 4.9 92 14.1 14.3 99 SNIDER BASIN 8060 8.1 8.9 91 18.1 19.3 94 SPRING CREEK DIVIDE 9000 31.5 25.9 122 32.6 31.3 104 TRIPLE PEAK 8500 20.8 18.9 110 33.3 30.0 111 ----- ----- Basin wide percent of average 100 104 LOWER GREEN RIVER HAMS FORK 7840 .1 2.2 5 15.9 15.7 101 HEWINTA 9519 .0 5.5 0 17.2 18.8 91 HICKERSON PARK 9145 .0 2.8 0 13.4 11.1 121 HOLE-IN-ROCK 9150 .0 2.3 0 12.7 10.7 119 INDIAN CREEK 9425 -M 25.0 * 27.3 30.7 89 KELLEY R.S. 8180 11.0 10.3 107 22.1 24.6 90 STEEL CREEK PARK 10200 15.1 18.6 81 21.0 21.4 98 ----- ----- Basin wide percent of average 63 97 UPPER BEAR RIVER BUG LAKE 7950 11.6 12.5 93 21.9 23.5 93 HAYDEN FORK 9212 .2 8.6 2 27.3 26.4 103 KELLEY R.S. 8180 11.0 10.3 107 22.1 24.6 90 LILY LAKE 9156 1.2 7.4 16 21.5 22.3 96 MONTE CRISTO 8960 23.0 24.1 95 31.9 31.9 100 SALT RIVER SUMMIT 7760 8.8 6.2 142 20.3 22.6 90 TRIAL LAKE 9992 20.3 24.3 84 29.8 30.9 96 ----- ----- Basin wide percent of average 81 96 ----------------------------------------------------------------------------- -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.