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 16 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 3.4 6.5 52 24.3 25.6 95 COTTONWOOD CREEK 7670 20.6 13.9 148 38.5 33.9 114 GRAND TARGHEE 9260 52.8 -M * 42.4 -M * GRANITE CREEK 6770 5.9 7.8 76 25.5 23.6 108 GRASSY LAKE 7265 25.1 26.5 95 43.0 42.9 100 GROS VENTRE SUMMIT 8750 10.5 9.9 106 19.4 16.4 118 GUNSIGHT PASS 9820 18.1 -M * 20.9 -M * LEWIS LAKE DIVIDE 7850 35.3 29.0 122 42.1 43.4 97 PHILLIPS BENCH 8200 27.1 24.1 112 36.1 34.8 104 SALT RIVER SUMMIT 7760 7.0 4.9 143 20.4 22.8 89 SNAKE RIVER STATION 6920 5.5 5.7 96 28.9 26.9 107 SPRING CREEK DIVIDE 9000 30.5 24.7 123 32.8 31.6 104 THUMB DIVIDE 7980 16.2 9.7 167 27.5 23.4 118 TOGWOTEE PASS 9580 33.2 27.4 121 36.5 30.8 119 TWO OCEAN PLATEAU 9240 48.7 30.7 159 37.8 34.1 111 WILLOW CREEK 8380 30.9 25.3 122 48.5 40.1 121 ----- ----- Basin wide percent of average 122 107 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 28.6 25.5 112 27.3 25.2 108 BLACK BEAR 8170 42.4 36.5 116 45.3 48.0 94 CANYON 7870 13.1 7.1 185 20.3 19.0 107 FISHER CREEK 9100 45.4 36.6 124 45.0 44.1 102 MADISON PLATEAU 7750 23.8 19.5 122 32.1 32.1 100 NORTHEAST ENTRANCE 7350 .0 3.3 0 17.8 16.0 111 PARKER PEAK 9400 32.6 24.0 136 24.5 21.2 116 SYLVAN LAKE 8420 22.5 20.3 111 30.7 26.6 115 THUMB DIVIDE 7980 16.2 9.7 167 27.5 23.4 118 TWO OCEAN PLATEAU 9240 48.7 30.7 159 37.8 34.1 111 WHISKEY CREEK 6800 15.7 9.8 160 26.7 25.6 104 WHITE MILL 8700 31.1 24.7 126 31.6 33.1 95 WOLVERINE 7650 2.5 3.2 78 16.9 16.7 101 ----- ----- Basin wide percent of average 129 105 WIND RIVER BURROUGHS CREEK 8750 17.4 10.4 167 21.9 20.9 105 COLD SPRINGS 9630 4.1 3.3 124 15.6 15.5 101 DEER PARK 9700 13.3 17.2 77 23.1 28.8 80 HOBBS PARK 10100 17.2 16.7 103 20.9 18.9 111 LITTLE WARM 9370 10.2 7.8 131 19.7 18.5 106 SOUTH PASS 9040 11.3 14.1 80 20.1 24.5 82 ST. LAWRENCE ALT 8620 -M 3.7 * 14.6 13.7 107 TOGWOTEE PASS 9580 33.2 27.4 121 36.5 30.8 119 TOWNSEND CREEK 8700 6.0 5.7 105 17.3 17.2 101 ----- ----- Basin wide percent of average 110 100 BIGHORN BASIN BALD MTN. 9380 22.3 23.0 97 19.8 23.4 85 BEAR TRAP MEADOW 8200 .2 .7 29 12.5 12.5 100 BLACKWATER 9780 33.4 28.8 116 30.8 26.6 116 BONE SPRINGS DIV 9350 18.9 16.2 117 18.8 20.3 93 EVENING STAR 9200 34.8 32.5 107 39.9 32.0 125 GRAVE SPRINGS 8550 6.7 7.9 85 12.6 14.6 86 KIRWIN 9550 14.0 11.0 127 19.8 15.8 125 MARQUETTE 8760 7.5 8.9 84 13.5 15.8 85 MIDDLE POWDER 7760 9.9 11.1 89 13.5 17.5 77 OWL CREEK 8975 .0 2.3 0 10.3 9.5 108 POWDER RIVER PASS 9480 12.5 8.1 154 19.5 17.6 111 SHELL CREEK 9580 19.6 16.3 120 20.3 18.6 109 SYLVAN LAKE 8420 22.5 20.3 111 30.7 26.6 115 SYLVAN ROAD 7120 .3 2.7 11 25.5 21.9 116 TIMBER CREEK 7950 .2 2.2 9 12.2 12.4 98 YOUNTS PEAK 8350 20.0 15.4 130 20.7 20.3 102 ----- ----- Basin wide percent of average 107 105 SHOSHONE RIVER BLACKWATER 9780 33.4 28.8 116 30.8 26.6 116 EVENING STAR 9200 34.8 32.5 107 39.9 32.0 125 KIRWIN 9550 14.0 11.0 127 19.8 15.8 125 MARQUETTE 8760 7.5 8.9 84 13.5 15.8 85 SYLVAN LAKE 8420 22.5 20.3 111 30.7 26.6 115 SYLVAN ROAD 7120 .3 2.7 11 25.5 21.9 116 YOUNTS PEAK 8350 20.0 15.4 130 20.7 20.3 102 ----- ----- Basin wide percent of average 111 114 POWDER-TONGUE BEAR TRAP MEADOW 8200 .2 .7 29 12.5 12.5 100 BIG GOOSE 7990 9.2 9.1 101 16.5 14.8 111 BONE SPRINGS DIV 9350 18.9 16.2 117 18.8 20.3 93 BURGESS JUNCTION 7880 11.8 10.2 116 16.0 17.0 94 CLOUD PEAK RESERVOIR 9860 19.5 14.8 132 21.7 19.4 112 DOME LAKE 8880 10.1 10.4 97 19.8 18.8 105 GRAVE SPRINGS 8550 6.7 7.9 85 12.6 14.6 86 HANSEN SAWMILL 8360 .0 2.2 0 13.2 12.4 106 MIDDLE POWDER 7760 9.9 11.1 89 13.5 17.5 77 POWDER RIVER PASS 9480 12.5 8.1 154 19.5 17.6 111 SUCKER CREEK 8880 14.9 10.2 146 21.4 19.5 110 TIE CREEK 6870 .0 1.3 0 17.6 15.4 114 ----- ----- Basin wide percent of average 111 102 BELLE FOURCHE BLIND PARK 6890 -M .1 * 18.0 15.9 113 COLE CANYON 5910 .0 .8 0 15.0 11.2 134 NORTH RAPID CREEK 6130 .0 .6 0 17.4 12.7 137 ----- ----- Basin wide percent of average 0 127 UPPER N. PLATTE RIVER COLUMBINE 9160 4.4 13.1 34 33.2 30.7 108 DIVIDE PEAK 8880 16.9 12.8 132 33.4 25.9 129 ELK RIVER 8700 .1 7.6 1 25.7 24.5 105 JOE WRIGHT 10120 22.6 23.8 95 34.9 32.5 107 NORTH FRENCH CREEK 10130 36.6 33.2 110 39.7 32.0 124 OLD BATTLE 10000 38.2 35.5 108 47.4 42.2 112 SAGE CREEK BASIN 7850 .0 7.4 0 19.4 15.0 129 SOUTH BRUSH CREEK 8440 .1 6.5 2 22.8 21.9 104 TOWER 10500 47.9 51.5 93 51.0 47.7 107 WEBBER SPRINGS 9250 16.3 18.1 90 35.8 33.0 108 WILLOW CREEK PASS 9540 8.2 11.2 73 16.1 17.1 94 ----- ----- Basin wide percent of average 87 111 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 20.4 23.1 88 28.4 29.2 97 CASPER MTN. 7900 8.9 11.7 76 17.5 21.8 80 DEADMAN HILL 10220 18.6 18.0 103 23.8 22.9 104 DEER PARK 9700 13.3 17.2 77 23.1 28.8 80 LAPRELE CREEK 8375 2.3 3.6 64 16.9 18.2 93 RENO HILL 8400 10.5 9.7 108 21.4 22.5 95 ROACH 9700 11.2 13.4 84 24.2 24.4 99 SAND LAKE 10050 34.4 35.5 97 36.9 31.8 116 SOUTH PASS 9040 11.3 14.1 80 20.1 24.5 82 WINDY PEAK 7900 1.0 1.7 59 15.3 15.2 101 ----- ----- Basin wide percent of average 89 95 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 .6 0 22.9 19.8 116 DIVIDE PEAK 8880 16.9 12.8 132 33.4 25.9 129 OLD BATTLE 10000 38.2 35.5 108 47.4 42.2 112 SANDSTONE RS 8150 .0 3.8 0 25.4 23.4 109 WHISKEY PARK 8950 27.4 26.5 103 40.8 36.0 113 ----- ----- Basin wide percent of average 104 115 UPPER GREEN RIVER BIG SANDY OPENING 9080 8.0 9.0 89 16.7 17.2 97 BLIND BULL SUM 8650 31.6 24.9 127 25.6 26.6 96 EAST RIM DIVIDE 7930 .0 9.2 0 14.7 14.9 99 ELKHART PARK G.S. 9400 12.1 9.4 129 18.9 17.4 109 GROS VENTRE SUMMIT 8750 10.5 9.9 106 19.4 16.4 118 GUNSIGHT PASS 9820 18.1 -M * 20.9 -M * KENDALL R.S. 7740 .1 3.7 3 17.5 17.5 100 LOOMIS PARK 8240 7.4 9.7 76 22.4 21.2 106 NEW FORK LAKE 8340 2.5 3.8 66 14.5 14.5 100 SNIDER BASIN 8060 5.7 7.7 74 18.1 19.4 93 SPRING CREEK DIVIDE 9000 30.5 24.7 123 32.8 31.6 104 TRIPLE PEAK 8500 19.2 17.1 112 33.7 30.3 111 ----- ----- Basin wide percent of average 99 103 LOWER GREEN RIVER HAMS FORK 7840 .1 1.1 9 16.0 15.9 101 HEWINTA 9519 .0 4.5 0 17.3 19.0 91 HICKERSON PARK 9145 .0 2.1 0 13.3 11.4 117 HOLE-IN-ROCK 9150 .0 1.7 0 12.7 10.9 117 INDIAN CREEK 9425 -M 23.7 * 27.4 31.0 88 KELLEY R.S. 8180 9.3 9.1 102 22.1 24.9 89 STEEL CREEK PARK 10200 10.0 18.1 55 21.0 21.6 97 ----- ----- Basin wide percent of average 53 96 UPPER BEAR RIVER BUG LAKE 7950 9.4 10.9 86 22.0 23.8 92 HAYDEN FORK 9212 .1 7.3 1 27.3 26.8 102 KELLEY R.S. 8180 9.3 9.1 102 22.1 24.9 89 LILY LAKE 9156 .0 6.3 0 21.6 22.6 96 MONTE CRISTO 8960 18.7 22.7 82 32.0 32.2 99 SALT RIVER SUMMIT 7760 7.0 4.9 143 20.4 22.8 89 TRIAL LAKE 9992 16.8 23.2 72 29.7 31.3 95 ----- ----- Basin wide percent of average 73 95 ----------------------------------------------------------------------------- -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.