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 THURSDAY: MAY 7 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 8.7 10.4 84 23.8 24.8 96 COTTONWOOD CREEK 7670 26.8 17.9 150 38.4 32.6 118 GRAND TARGHEE 9260 55.9 -M * 42.2 -M * GRANITE CREEK 6770 11.0 11.2 98 25.2 22.8 111 GRASSY LAKE 7265 31.7 31.3 101 42.4 41.6 102 GROS VENTRE SUMMIT 8750 14.0 12.3 114 19.0 15.7 121 GUNSIGHT PASS 9820 18.2 -M * 20.6 -M * LEWIS LAKE DIVIDE 7850 37.4 33.0 113 41.3 42.3 98 PHILLIPS BENCH 8200 31.4 28.0 112 35.6 33.7 106 SALT RIVER SUMMIT 7760 12.6 8.8 143 20.4 22.0 93 SNAKE RIVER STATION 6920 11.8 10.1 117 28.3 26.0 109 SPRING CREEK DIVIDE 9000 33.5 27.7 121 32.6 30.7 106 THUMB DIVIDE 7980 20.6 13.2 156 26.6 22.5 118 TOGWOTEE PASS 9580 32.8 28.1 117 35.9 29.6 121 TWO OCEAN PLATEAU 9240 46.6 31.7 147 36.4 32.8 111 WILLOW CREEK 8380 36.0 29.2 123 48.1 38.6 125 ----- ----- Basin wide percent of average 121 109 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 27.7 25.8 107 25.8 24.1 107 BLACK BEAR 8170 43.9 39.0 113 44.7 46.6 96 CANYON 7870 15.1 9.8 154 19.6 18.2 108 FISHER CREEK 9100 42.8 37.7 114 42.4 42.7 99 MADISON PLATEAU 7750 25.7 22.7 113 31.6 31.0 102 NORTHEAST ENTRANCE 7350 3.7 5.7 65 16.9 15.2 111 PARKER PEAK 9400 33.4 24.4 137 23.5 20.1 117 SYLVAN LAKE 8420 23.7 22.7 104 29.5 25.4 116 THUMB DIVIDE 7980 20.6 13.2 156 26.6 22.5 118 TWO OCEAN PLATEAU 9240 46.6 31.7 147 36.4 32.8 111 WHISKEY CREEK 6800 18.8 13.4 140 26.3 24.7 106 WHITE MILL 8700 29.6 26.0 114 29.8 31.9 93 WOLVERINE 7650 8.4 5.9 142 16.1 15.7 103 ----- ----- Basin wide percent of average 122 105 WIND RIVER BURROUGHS CREEK 8750 19.2 12.3 156 21.5 19.9 108 COLD SPRINGS 9630 8.7 4.6 189 15.4 14.5 106 DEER PARK 9700 15.2 16.7 91 22.7 27.6 82 HOBBS PARK 10100 18.2 17.6 103 20.7 17.7 117 LITTLE WARM 9370 13.3 9.8 136 19.4 17.4 111 SOUTH PASS 9040 14.8 16.9 88 20.0 23.4 85 ST. LAWRENCE ALT 8620 6.3 5.3 119 14.6 12.7 115 TOGWOTEE PASS 9580 32.8 28.1 117 35.9 29.6 121 TOWNSEND CREEK 8700 10.4 7.8 133 17.3 16.1 107 ----- ----- Basin wide percent of average 117 105 BIGHORN BASIN BALD MTN. 9380 21.2 23.4 91 18.9 22.1 86 BEAR TRAP MEADOW 8200 4.5 1.8 250 12.1 11.5 105 BLACKWATER 9780 31.6 28.7 110 28.9 25.4 114 BONE SPRINGS DIV 9350 18.6 17.6 106 17.8 19.0 94 EVENING STAR 9200 34.4 33.2 104 37.9 30.6 124 GRAVE SPRINGS 8550 8.8 10.1 87 12.4 13.8 90 KIRWIN 9550 15.8 12.6 125 19.2 14.8 130 MARQUETTE 8760 8.5 10.6 80 12.5 14.4 87 MIDDLE POWDER 7760 11.2 13.3 84 12.8 16.4 78 OWL CREEK 8975 3.8 3.5 109 9.9 8.7 114 POWDER RIVER PASS 9480 12.7 9.6 132 18.6 16.5 113 SHELL CREEK 9580 19.1 16.7 114 19.3 17.5 110 SYLVAN LAKE 8420 23.7 22.7 104 29.5 25.4 116 SYLVAN ROAD 7120 5.2 6.5 80 23.9 21.0 114 TIMBER CREEK 7950 4.3 4.2 102 11.9 11.2 106 YOUNTS PEAK 8350 21.3 17.6 121 20.2 19.3 105 ----- ----- Basin wide percent of average 105 106 SHOSHONE RIVER BLACKWATER 9780 31.6 28.7 110 28.9 25.4 114 EVENING STAR 9200 34.4 33.2 104 37.9 30.6 124 KIRWIN 9550 15.8 12.6 125 19.2 14.8 130 MARQUETTE 8760 8.5 10.6 80 12.5 14.4 87 SYLVAN LAKE 8420 23.7 22.7 104 29.5 25.4 116 SYLVAN ROAD 7120 5.2 6.5 80 23.9 21.0 114 YOUNTS PEAK 8350 21.3 17.6 121 20.2 19.3 105 ----- ----- Basin wide percent of average 107 114 POWDER-TONGUE BEAR TRAP MEADOW 8200 4.5 1.8 250 12.1 11.5 105 BIG GOOSE 7990 10.2 10.8 94 16.0 13.6 118 BONE SPRINGS DIV 9350 18.6 17.6 106 17.8 19.0 94 BURGESS JUNCTION 7880 12.8 12.3 104 15.6 16.0 98 CLOUD PEAK RESERVOIR 9860 19.6 15.8 124 21.1 17.9 118 DOME LAKE 8880 12.2 12.4 98 19.1 17.5 109 GRAVE SPRINGS 8550 8.8 10.1 87 12.4 13.8 90 HANSEN SAWMILL 8360 2.6 4.1 63 13.0 11.5 113 MIDDLE POWDER 7760 11.2 13.3 84 12.8 16.4 78 POWDER RIVER PASS 9480 12.7 9.6 132 18.6 16.5 113 SUCKER CREEK 8880 15.5 11.9 130 20.7 18.2 114 TIE CREEK 6870 2.1 3.2 66 17.4 14.2 123 ----- ----- Basin wide percent of average 106 106 BELLE FOURCHE BLIND PARK 6890 -M 3.0 * 17.4 14.8 118 COLE CANYON 5910 2.8 2.8 100 15.3 10.2 150 NORTH RAPID CREEK 6130 .0 2.1 0 17.0 11.9 143 ----- ----- Basin wide percent of average 57 135 UPPER N. PLATTE RIVER COLUMBINE 9160 15.1 18.6 81 32.9 29.8 110 DIVIDE PEAK 8880 25.1 17.4 144 33.5 24.9 135 ELK RIVER 8700 9.6 12.5 77 25.8 23.6 109 JOE WRIGHT 10120 27.5 25.0 110 34.8 31.0 112 NORTH FRENCH CREEK 10130 40.6 34.5 118 39.6 30.6 129 OLD BATTLE 10000 41.5 37.3 111 47.3 40.7 116 SAGE CREEK BASIN 7850 6.8 10.1 67 19.5 14.4 135 SOUTH BRUSH CREEK 8440 7.4 9.6 77 22.8 20.8 110 TOWER 10500 52.0 52.4 99 50.6 46.2 110 WEBBER SPRINGS 9250 23.4 23.3 100 35.8 31.8 113 WILLOW CREEK PASS 9540 13.1 13.7 96 15.8 16.2 98 ----- ----- Basin wide percent of average 103 116 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 26.1 27.2 96 28.1 27.8 101 CASPER MTN. 7900 12.8 15.7 82 17.5 20.4 86 DEADMAN HILL 10220 22.4 19.6 114 23.7 21.7 109 DEER PARK 9700 15.2 16.7 91 22.7 27.6 82 LAPRELE CREEK 8375 7.5 5.9 127 16.8 17.1 98 RENO HILL 8400 14.2 13.3 107 21.4 21.1 101 ROACH 9700 17.0 17.3 98 24.2 23.2 104 SAND LAKE 10050 37.2 37.0 101 36.8 30.3 121 SOUTH PASS 9040 14.8 16.9 88 20.0 23.4 85 WINDY PEAK 7900 7.3 3.7 197 15.0 14.1 106 ----- ----- Basin wide percent of average 101 100 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 3.2 0 23.0 19.1 120 DIVIDE PEAK 8880 25.1 17.4 144 33.5 24.9 135 OLD BATTLE 10000 41.5 37.3 111 47.3 40.7 116 SANDSTONE RS 8150 9.2 7.5 123 25.3 22.4 113 WHISKEY PARK 8950 32.0 29.7 108 40.8 34.7 118 ----- ----- Basin wide percent of average 113 120 UPPER GREEN RIVER BIG SANDY OPENING 9080 13.0 12.2 107 16.7 16.4 102 BLIND BULL SUM 8650 32.4 27.1 120 25.2 25.7 98 EAST RIM DIVIDE 7930 3.3 12.1 27 14.7 14.2 104 ELKHART PARK G.S. 9400 14.2 11.8 120 18.9 16.5 115 GROS VENTRE SUMMIT 8750 14.0 12.3 114 19.0 15.7 121 GUNSIGHT PASS 9820 18.2 -M * 20.6 -M * KENDALL R.S. 7740 4.6 8.0 57 17.2 16.9 102 LOOMIS PARK 8240 12.1 12.9 94 22.1 20.4 108 NEW FORK LAKE 8340 8.3 7.0 119 14.0 13.8 101 SNIDER BASIN 8060 11.2 11.2 100 18.1 18.9 96 SPRING CREEK DIVIDE 9000 33.5 27.7 121 32.6 30.7 106 TRIPLE PEAK 8500 23.8 21.9 109 33.1 29.3 113 ----- ----- Basin wide percent of average 104 106 LOWER GREEN RIVER HAMS FORK 7840 3.8 4.3 88 15.9 15.2 105 HEWINTA 9519 .9 7.6 12 17.3 18.3 95 HICKERSON PARK 9145 1.1 4.4 25 13.4 10.6 126 HOLE-IN-ROCK 9150 .6 3.6 17 12.8 10.2 125 INDIAN CREEK 9425 -M 27.1 * 27.2 30.0 91 KELLEY R.S. 8180 14.1 12.5 113 22.1 24.0 92 STEEL CREEK PARK 10200 16.8 18.9 89 21.0 20.8 101 ----- ----- Basin wide percent of average 73 100 UPPER BEAR RIVER BUG LAKE 7950 15.5 15.7 99 22.0 22.9 96 HAYDEN FORK 9212 7.1 11.1 64 27.4 25.7 107 KELLEY R.S. 8180 14.1 12.5 113 22.1 24.0 92 LILY LAKE 9156 8.2 9.5 86 21.6 21.6 100 MONTE CRISTO 8960 25.5 26.6 96 32.0 31.0 103 SALT RIVER SUMMIT 7760 12.6 8.8 143 20.4 22.0 93 TRIAL LAKE 9992 25.4 25.9 98 29.8 30.1 99 ----- ----- Basin wide percent of average 98 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.