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 TUESDAY: MAY 5 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 8.9 11.1 80 22.8 24.6 93 COTTONWOOD CREEK 7670 26.9 18.7 144 37.6 32.4 116 GRAND TARGHEE 9260 55.1 -M * 41.7 -M * GRANITE CREEK 6770 11.0 11.9 92 24.4 22.6 108 GRASSY LAKE 7265 32.0 32.2 99 41.5 41.3 100 GROS VENTRE SUMMIT 8750 14.0 12.7 110 18.8 15.5 121 GUNSIGHT PASS 9820 17.7 -M * 20.1 -M * LEWIS LAKE DIVIDE 7850 36.8 33.7 109 40.1 42.0 95 PHILLIPS BENCH 8200 30.4 28.6 106 34.7 33.5 104 SALT RIVER SUMMIT 7760 13.3 9.6 139 20.1 21.9 92 SNAKE RIVER STATION 6920 12.5 10.9 115 27.6 25.8 107 SPRING CREEK DIVIDE 9000 32.8 28.1 117 32.0 30.5 105 THUMB DIVIDE 7980 20.5 13.9 147 26.0 22.3 117 TOGWOTEE PASS 9580 32.2 28.1 115 35.2 29.4 120 TWO OCEAN PLATEAU 9240 46.0 31.8 145 35.5 32.5 109 WILLOW CREEK 8380 35.8 29.8 120 47.1 38.2 123 ----- ----- Basin wide percent of average 117 107 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 26.8 26.0 103 25.0 23.9 105 BLACK BEAR 8170 41.8 39.4 106 42.8 46.3 92 CANYON 7870 14.8 10.4 142 19.0 18.0 106 FISHER CREEK 9100 41.2 37.7 109 41.3 42.4 97 MADISON PLATEAU 7750 25.4 23.4 109 30.4 30.8 99 NORTHEAST ENTRANCE 7350 4.6 6.1 75 16.4 15.1 109 PARKER PEAK 9400 32.3 24.5 132 22.9 19.9 115 SYLVAN LAKE 8420 22.8 23.2 98 28.6 25.1 114 THUMB DIVIDE 7980 20.5 13.9 147 26.0 22.3 117 TWO OCEAN PLATEAU 9240 46.0 31.8 145 35.5 32.5 109 WHISKEY CREEK 6800 19.0 14.1 135 25.3 24.5 103 WHITE MILL 8700 28.3 26.2 108 28.6 31.6 91 WOLVERINE 7650 8.6 6.3 137 15.4 15.5 99 ----- ----- Basin wide percent of average 117 103 WIND RIVER BURROUGHS CREEK 8750 18.8 12.9 146 21.1 19.6 108 COLD SPRINGS 9630 9.4 4.6 204 15.2 14.3 106 DEER PARK 9700 15.5 17.6 88 22.5 27.4 82 HOBBS PARK 10100 18.4 17.9 103 20.4 17.4 117 LITTLE WARM 9370 13.2 10.3 128 19.0 17.2 110 SOUTH PASS 9040 15.5 17.4 89 19.8 23.1 86 ST. LAWRENCE ALT 8620 7.4 5.6 132 14.5 12.4 117 TOGWOTEE PASS 9580 32.2 28.1 115 35.2 29.4 120 TOWNSEND CREEK 8700 11.4 8.3 137 17.3 15.9 109 ----- ----- Basin wide percent of average 116 105 BIGHORN BASIN BALD MTN. 9380 21.0 23.4 90 18.7 21.8 86 BEAR TRAP MEADOW 8200 5.4 2.0 270 12.0 11.2 107 BLACKWATER 9780 30.6 29.1 105 28.3 25.1 113 BONE SPRINGS DIV 9350 18.4 18.1 102 17.5 18.7 94 EVENING STAR 9200 32.9 33.2 99 36.7 30.4 121 GRAVE SPRINGS 8550 9.6 10.7 90 12.4 13.5 92 KIRWIN 9550 15.7 12.8 123 18.8 14.6 129 MARQUETTE 8760 9.0 10.9 83 12.6 14.1 89 MIDDLE POWDER 7760 12.0 13.8 87 12.8 16.2 79 OWL CREEK 8975 4.8 3.6 133 9.9 8.5 116 POWDER RIVER PASS 9480 12.9 10.1 128 18.5 16.2 114 SHELL CREEK 9580 19.1 16.6 115 18.9 17.2 110 SYLVAN LAKE 8420 22.8 23.2 98 28.6 25.1 114 SYLVAN ROAD 7120 5.7 7.3 78 23.0 20.8 111 TIMBER CREEK 7950 5.0 4.6 109 11.8 10.9 108 YOUNTS PEAK 8350 21.0 18.0 117 19.6 19.1 103 ----- ----- Basin wide percent of average 104 106 SHOSHONE RIVER BLACKWATER 9780 30.6 29.1 105 28.3 25.1 113 EVENING STAR 9200 32.9 33.2 99 36.7 30.4 121 KIRWIN 9550 15.7 12.8 123 18.8 14.6 129 MARQUETTE 8760 9.0 10.9 83 12.6 14.1 89 SYLVAN LAKE 8420 22.8 23.2 98 28.6 25.1 114 SYLVAN ROAD 7120 5.7 7.3 78 23.0 20.8 111 YOUNTS PEAK 8350 21.0 18.0 117 19.6 19.1 103 ----- ----- Basin wide percent of average 102 112 POWDER-TONGUE BEAR TRAP MEADOW 8200 5.4 2.0 270 12.0 11.2 107 BIG GOOSE 7990 10.7 11.1 96 15.9 13.4 119 BONE SPRINGS DIV 9350 18.4 18.1 102 17.5 18.7 94 BURGESS JUNCTION 7880 13.2 12.8 103 15.6 15.8 99 CLOUD PEAK RESERVOIR 9860 20.1 16.1 125 21.0 17.6 119 DOME LAKE 8880 12.5 12.9 97 18.9 17.2 110 GRAVE SPRINGS 8550 9.6 10.7 90 12.4 13.5 92 HANSEN SAWMILL 8360 3.8 4.4 86 12.9 11.3 114 MIDDLE POWDER 7760 12.0 13.8 87 12.8 16.2 79 POWDER RIVER PASS 9480 12.9 10.1 128 18.5 16.2 114 SUCKER CREEK 8880 15.9 12.5 127 20.7 17.9 116 TIE CREEK 6870 3.3 3.6 92 17.4 13.9 125 ----- ----- Basin wide percent of average 108 107 BELLE FOURCHE BLIND PARK 6890 .0 3.7 0 17.3 14.6 118 COLE CANYON 5910 3.9 3.6 108 15.0 9.9 152 NORTH RAPID CREEK 6130 .0 2.7 0 16.9 11.7 144 ----- ----- Basin wide percent of average 39 136 UPPER N. PLATTE RIVER COLUMBINE 9160 17.5 19.6 89 32.7 29.5 111 DIVIDE PEAK 8880 26.1 18.3 143 33.2 24.6 135 ELK RIVER 8700 11.7 13.5 87 25.7 23.4 110 JOE WRIGHT 10120 -M 25.1 * -M 30.6 * NORTH FRENCH CREEK 10130 40.0 34.5 116 38.9 30.2 129 OLD BATTLE 10000 41.3 37.2 111 46.9 40.4 116 SAGE CREEK BASIN 7850 8.8 10.6 83 19.4 14.3 136 SOUTH BRUSH CREEK 8440 8.7 10.2 85 22.6 20.5 110 TOWER 10500 51.8 52.4 99 50.2 45.8 110 WEBBER SPRINGS 9250 23.9 24.1 99 35.6 31.6 113 WILLOW CREEK PASS 9540 13.7 13.9 99 15.7 16.0 98 ----- ----- Basin wide percent of average 104 116 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 26.1 27.8 94 27.6 27.5 100 CASPER MTN. 7900 14.0 16.4 85 17.6 20.1 88 DEADMAN HILL 10220 23.0 19.7 117 23.7 21.4 111 DEER PARK 9700 15.5 17.6 88 22.5 27.4 82 LAPRELE CREEK 8375 8.4 6.4 131 16.7 16.9 99 RENO HILL 8400 15.4 13.9 111 21.3 20.8 102 ROACH 9700 18.0 17.9 101 24.2 22.9 106 SAND LAKE 10050 37.1 37.0 100 36.4 29.9 122 SOUTH PASS 9040 15.5 17.4 89 19.8 23.1 86 WINDY PEAK 7900 8.8 4.2 210 14.9 13.9 107 ----- ----- Basin wide percent of average 102 100 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .1 3.7 3 22.7 18.9 120 DIVIDE PEAK 8880 26.1 18.3 143 33.2 24.6 135 OLD BATTLE 10000 41.3 37.2 111 46.9 40.4 116 SANDSTONE RS 8150 11.1 8.3 134 25.1 22.2 113 WHISKEY PARK 8950 32.3 30.1 107 40.5 34.4 118 ----- ----- Basin wide percent of average 114 120 UPPER GREEN RIVER BIG SANDY OPENING 9080 12.9 12.7 102 16.2 16.2 100 BLIND BULL SUM 8650 31.4 27.4 115 24.4 25.5 96 EAST RIM DIVIDE 7930 4.1 12.6 33 14.4 14.1 102 ELKHART PARK G.S. 9400 15.3 12.3 124 18.6 16.3 114 GROS VENTRE SUMMIT 8750 14.0 12.7 110 18.8 15.5 121 GUNSIGHT PASS 9820 17.7 -M * 20.1 -M * KENDALL R.S. 7740 5.1 8.8 58 16.7 16.8 99 LOOMIS PARK 8240 12.4 13.5 92 21.8 20.2 108 NEW FORK LAKE 8340 8.6 7.6 113 13.9 13.6 102 SNIDER BASIN 8060 12.3 11.8 104 17.8 18.7 95 SPRING CREEK DIVIDE 9000 32.8 28.1 117 32.0 30.5 105 TRIPLE PEAK 8500 23.3 22.7 103 31.7 29.0 109 ----- ----- Basin wide percent of average 101 105 LOWER GREEN RIVER HAMS FORK 7840 5.3 5.0 106 15.3 15.0 102 HEWINTA 9519 3.5 8.3 42 17.3 18.1 96 HICKERSON PARK 9145 2.9 4.9 59 13.4 10.5 128 HOLE-IN-ROCK 9150 2.8 4.1 68 12.8 10.0 128 INDIAN CREEK 9425 -M 27.6 * 26.8 29.8 90 KELLEY R.S. 8180 14.4 13.2 109 21.8 23.9 91 STEEL CREEK PARK 10200 17.4 18.9 92 21.0 20.6 102 ----- ----- Basin wide percent of average 85 100 UPPER BEAR RIVER BUG LAKE 7950 16.9 16.7 101 21.8 22.7 96 HAYDEN FORK 9212 9.2 11.9 77 27.4 25.5 107 KELLEY R.S. 8180 14.4 13.2 109 21.8 23.9 91 LILY LAKE 9156 10.3 10.2 101 21.6 21.4 101 MONTE CRISTO 8960 26.8 27.4 98 32.0 30.7 104 SALT RIVER SUMMIT 7760 13.3 9.6 139 20.1 21.9 92 TRIAL LAKE 9992 26.4 26.2 101 29.7 29.8 100 ----- ----- Basin wide percent of average 102 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.