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 FRIDAY: MAY 8 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 8.2 10.0 82 24.0 24.9 96 COTTONWOOD CREEK 7670 26.3 17.5 150 38.5 32.8 117 GRAND TARGHEE 9260 55.7 -M * 42.3 -M * GRANITE CREEK 6770 10.3 10.8 95 25.4 22.9 111 GRASSY LAKE 7265 30.9 30.8 100 42.5 41.8 102 GROS VENTRE SUMMIT 8750 13.7 12.1 113 19.2 15.7 122 GUNSIGHT PASS 9820 18.4 -M * 20.6 -M * LEWIS LAKE DIVIDE 7850 37.3 32.6 114 41.3 42.4 97 PHILLIPS BENCH 8200 31.0 27.6 112 35.8 33.8 106 SALT RIVER SUMMIT 7760 12.0 8.4 143 20.4 22.1 92 SNAKE RIVER STATION 6920 11.2 9.6 117 28.6 26.1 110 SPRING CREEK DIVIDE 9000 33.3 27.4 122 32.6 30.8 106 THUMB DIVIDE 7980 20.6 12.9 160 26.8 22.6 119 TOGWOTEE PASS 9580 33.0 28.1 117 36.1 29.8 121 TWO OCEAN PLATEAU 9240 47.4 31.6 150 37.0 33.0 112 WILLOW CREEK 8380 35.6 28.8 124 48.3 38.8 124 ----- ----- Basin wide percent of average 122 109 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 28.2 25.9 109 26.2 24.2 108 BLACK BEAR 8170 44.1 38.8 114 44.8 46.8 96 CANYON 7870 15.1 9.5 159 19.7 18.2 108 FISHER CREEK 9100 43.8 37.7 116 42.9 42.9 100 MADISON PLATEAU 7750 25.5 22.4 114 31.6 31.1 102 NORTHEAST ENTRANCE 7350 3.5 5.6 62 17.3 15.3 113 PARKER PEAK 9400 33.9 24.5 138 23.8 20.2 118 SYLVAN LAKE 8420 23.9 22.6 106 29.9 25.5 117 THUMB DIVIDE 7980 20.6 12.9 160 26.8 22.6 119 TWO OCEAN PLATEAU 9240 47.4 31.6 150 37.0 33.0 112 WHISKEY CREEK 6800 18.5 13.1 141 26.4 24.8 106 WHITE MILL 8700 30.6 26.0 118 30.6 32.0 96 WOLVERINE 7650 8.1 5.7 142 16.3 15.8 103 ----- ----- Basin wide percent of average 124 106 WIND RIVER BURROUGHS CREEK 8750 18.9 12.0 158 21.6 20.0 108 COLD SPRINGS 9630 8.3 4.6 180 15.4 14.6 105 DEER PARK 9700 15.1 16.8 90 23.0 27.7 83 HOBBS PARK 10100 18.2 17.5 104 20.7 17.8 116 LITTLE WARM 9370 13.1 9.6 136 19.6 17.5 112 SOUTH PASS 9040 14.4 16.6 87 20.1 23.5 86 ST. LAWRENCE ALT 8620 5.5 5.2 106 14.6 12.8 114 TOGWOTEE PASS 9580 33.0 28.1 117 36.1 29.8 121 TOWNSEND CREEK 8700 9.8 7.6 129 17.3 16.3 106 ----- ----- Basin wide percent of average 116 105 BIGHORN BASIN BALD MTN. 9380 21.5 23.5 91 19.0 22.2 86 BEAR TRAP MEADOW 8200 4.2 1.7 247 12.2 11.6 105 BLACKWATER 9780 32.3 28.7 113 29.5 25.5 116 BONE SPRINGS DIV 9350 18.9 17.5 108 18.0 19.2 94 EVENING STAR 9200 34.9 33.3 105 38.7 30.8 126 GRAVE SPRINGS 8550 8.5 9.8 87 12.4 13.9 89 KIRWIN 9550 15.8 12.5 126 19.3 14.9 130 MARQUETTE 8760 8.4 10.3 82 12.7 14.6 87 MIDDLE POWDER 7760 10.9 13.1 83 12.9 16.5 78 OWL CREEK 8975 2.6 3.4 76 9.8 8.8 111 POWDER RIVER PASS 9480 13.0 9.5 137 19.0 16.6 114 SHELL CREEK 9580 19.4 16.8 115 19.6 17.6 111 SYLVAN LAKE 8420 23.9 22.6 106 29.9 25.5 117 SYLVAN ROAD 7120 4.9 6.0 82 24.5 21.1 116 TIMBER CREEK 7950 3.8 3.9 97 11.9 11.3 105 YOUNTS PEAK 8350 21.3 17.5 122 20.4 19.4 105 ----- ----- Basin wide percent of average 106 107 SHOSHONE RIVER BLACKWATER 9780 32.3 28.7 113 29.5 25.5 116 EVENING STAR 9200 34.9 33.3 105 38.7 30.8 126 KIRWIN 9550 15.8 12.5 126 19.3 14.9 130 MARQUETTE 8760 8.4 10.3 82 12.7 14.6 87 SYLVAN LAKE 8420 23.9 22.6 106 29.9 25.5 117 SYLVAN ROAD 7120 4.9 6.0 82 24.5 21.1 116 YOUNTS PEAK 8350 21.3 17.5 122 20.4 19.4 105 ----- ----- Basin wide percent of average 108 115 POWDER-TONGUE BEAR TRAP MEADOW 8200 4.2 1.7 247 12.2 11.6 105 BIG GOOSE 7990 10.1 10.6 95 16.1 13.8 117 BONE SPRINGS DIV 9350 18.9 17.5 108 18.0 19.2 94 BURGESS JUNCTION 7880 12.7 12.2 104 15.7 16.1 98 CLOUD PEAK RESERVOIR 9860 19.7 15.7 125 21.2 18.1 117 DOME LAKE 8880 12.1 12.1 100 19.3 17.7 109 GRAVE SPRINGS 8550 8.5 9.8 87 12.4 13.9 89 HANSEN SAWMILL 8360 2.0 3.9 51 13.0 11.6 112 MIDDLE POWDER 7760 10.9 13.1 83 12.9 16.5 78 POWDER RIVER PASS 9480 13.0 9.5 137 19.0 16.6 114 SUCKER CREEK 8880 15.5 11.8 131 20.9 18.4 114 TIE CREEK 6870 1.8 2.8 64 17.5 14.3 122 ----- ----- Basin wide percent of average 107 106 BELLE FOURCHE BLIND PARK 6890 -M 2.7 * 17.5 14.9 117 COLE CANYON 5910 2.1 2.5 84 15.3 10.3 149 NORTH RAPID CREEK 6130 .0 1.9 0 17.1 12.0 142 ----- ----- Basin wide percent of average 48 134 UPPER N. PLATTE RIVER COLUMBINE 9160 13.5 18.1 75 32.9 29.9 110 DIVIDE PEAK 8880 24.1 17.0 142 33.4 25.0 134 ELK RIVER 8700 8.2 12.0 68 25.8 23.7 109 JOE WRIGHT 10120 26.9 25.0 108 34.8 31.1 112 NORTH FRENCH CREEK 10130 40.4 34.4 117 39.7 30.8 129 OLD BATTLE 10000 41.3 37.2 111 47.3 40.9 116 SAGE CREEK BASIN 7850 5.4 9.9 55 19.5 14.5 134 SOUTH BRUSH CREEK 8440 6.6 9.3 71 22.8 20.9 109 TOWER 10500 50.9 52.4 97 50.7 46.4 109 WEBBER SPRINGS 9250 22.5 22.8 99 35.7 32.0 112 WILLOW CREEK PASS 9540 12.5 13.5 93 15.8 16.3 97 ----- ----- Basin wide percent of average 100 115 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 25.5 26.9 95 28.2 28.0 101 CASPER MTN. 7900 12.3 15.3 80 17.5 20.6 85 DEADMAN HILL 10220 21.9 19.5 112 23.7 21.8 109 DEER PARK 9700 15.1 16.8 90 23.0 27.7 83 LAPRELE CREEK 8375 7.1 5.6 127 16.7 17.3 97 RENO HILL 8400 13.5 12.9 105 21.3 21.3 100 ROACH 9700 16.3 16.9 96 24.2 23.3 104 SAND LAKE 10050 37.0 36.9 100 36.8 30.5 121 SOUTH PASS 9040 14.4 16.6 87 20.1 23.5 86 WINDY PEAK 7900 6.2 3.5 177 15.0 14.2 106 ----- ----- Basin wide percent of average 99 99 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 2.9 0 23.0 19.1 120 DIVIDE PEAK 8880 24.1 17.0 142 33.4 25.0 134 OLD BATTLE 10000 41.3 37.2 111 47.3 40.9 116 SANDSTONE RS 8150 8.4 7.0 120 25.4 22.6 112 WHISKEY PARK 8950 29.9 29.5 101 40.8 34.9 117 ----- ----- Basin wide percent of average 111 119 UPPER GREEN RIVER BIG SANDY OPENING 9080 12.6 11.9 106 16.7 16.5 101 BLIND BULL SUM 8650 32.5 26.9 121 25.3 25.8 98 EAST RIM DIVIDE 7930 2.5 11.8 21 14.6 14.3 102 ELKHART PARK G.S. 9400 15.1 11.6 130 18.9 16.6 114 GROS VENTRE SUMMIT 8750 13.7 12.1 113 19.2 15.7 122 GUNSIGHT PASS 9820 18.4 -M * 20.6 -M * KENDALL R.S. 7740 3.8 7.6 50 17.3 17.0 102 LOOMIS PARK 8240 11.7 12.5 94 22.3 20.5 109 NEW FORK LAKE 8340 7.8 6.6 118 14.0 13.9 101 SNIDER BASIN 8060 10.8 10.8 100 18.1 18.9 96 SPRING CREEK DIVIDE 9000 33.3 27.4 122 32.6 30.8 106 TRIPLE PEAK 8500 24.0 21.4 112 33.5 29.4 114 ----- ----- Basin wide percent of average 104 106 LOWER GREEN RIVER HAMS FORK 7840 3.1 4.0 78 15.9 15.3 104 HEWINTA 9519 .0 7.3 0 17.3 18.4 94 HICKERSON PARK 9145 .0 4.1 0 13.4 10.7 125 HOLE-IN-ROCK 9150 .7 3.4 21 12.8 10.2 125 INDIAN CREEK 9425 -M 26.7 * 27.3 30.1 91 KELLEY R.S. 8180 14.0 12.2 115 22.2 24.1 92 STEEL CREEK PARK 10200 16.4 18.9 87 21.0 20.9 100 ----- ----- Basin wide percent of average 69 100 UPPER BEAR RIVER BUG LAKE 7950 14.9 15.2 98 22.0 23.0 96 HAYDEN FORK 9212 5.6 10.7 52 27.3 25.9 105 KELLEY R.S. 8180 14.0 12.2 115 22.2 24.1 92 LILY LAKE 9156 6.9 9.2 75 21.5 21.8 99 MONTE CRISTO 8960 24.9 26.3 95 31.9 31.2 102 SALT RIVER SUMMIT 7760 12.0 8.4 143 20.4 22.1 92 TRIAL LAKE 9992 24.9 25.7 97 29.8 30.3 98 ----- ----- Basin wide percent of average 96 98 ----------------------------------------------------------------------------- -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.