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 SUNDAY: MAY 3 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 9.6 11.9 81 22.4 24.5 91 COTTONWOOD CREEK 7670 27.5 19.4 142 37.0 32.1 115 GRAND TARGHEE 9260 53.9 -M * 40.9 -M * GRANITE CREEK 6770 11.5 12.5 92 23.9 22.5 106 GRASSY LAKE 7265 32.7 33.0 99 40.4 41.0 99 GROS VENTRE SUMMIT 8750 14.0 13.1 107 18.5 15.3 121 GUNSIGHT PASS 9820 17.5 -M * 19.9 -M * LEWIS LAKE DIVIDE 7850 35.5 34.3 103 38.7 41.8 93 PHILLIPS BENCH 8200 30.6 29.2 105 34.3 33.2 103 SALT RIVER SUMMIT 7760 13.8 10.3 134 19.8 21.7 91 SNAKE RIVER STATION 6920 12.7 11.8 108 26.8 25.6 105 SPRING CREEK DIVIDE 9000 32.5 28.4 114 31.6 30.3 104 THUMB DIVIDE 7980 20.4 14.6 140 25.4 22.1 115 TOGWOTEE PASS 9580 31.7 28.0 113 34.7 29.1 119 TWO OCEAN PLATEAU 9240 44.8 31.8 141 34.7 32.2 108 WILLOW CREEK 8380 35.7 30.4 117 46.5 37.9 123 ----- ----- Basin wide percent of average 114 106 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 26.6 25.9 103 24.8 23.6 105 BLACK BEAR 8170 40.7 39.8 102 41.8 46.0 91 CANYON 7870 14.6 11.0 133 18.6 17.8 104 FISHER CREEK 9100 40.0 37.7 106 40.3 42.1 96 MADISON PLATEAU 7750 25.6 24.0 107 29.6 30.5 97 NORTHEAST ENTRANCE 7350 5.4 6.7 81 15.9 14.9 107 PARKER PEAK 9400 32.1 24.5 131 22.6 19.6 115 SYLVAN LAKE 8420 22.3 23.5 95 27.9 24.8 112 THUMB DIVIDE 7980 20.4 14.6 140 25.4 22.1 115 TWO OCEAN PLATEAU 9240 44.8 31.8 141 34.7 32.2 108 WHISKEY CREEK 6800 18.8 14.9 126 24.4 24.3 100 WHITE MILL 8700 27.4 26.3 104 27.8 31.3 89 WOLVERINE 7650 9.3 6.9 135 15.3 15.3 100 ----- ----- Basin wide percent of average 114 101 WIND RIVER BURROUGHS CREEK 8750 18.7 13.4 140 20.5 19.4 106 COLD SPRINGS 9630 9.7 4.8 202 15.1 14.0 108 DEER PARK 9700 15.5 18.5 84 22.1 27.1 82 HOBBS PARK 10100 18.4 18.0 102 20.2 17.1 118 LITTLE WARM 9370 13.6 10.8 126 18.9 16.9 112 SOUTH PASS 9040 15.7 17.8 88 19.6 22.8 86 ST. LAWRENCE ALT 8620 8.0 6.0 133 14.5 12.2 119 TOGWOTEE PASS 9580 31.7 28.0 113 34.7 29.1 119 TOWNSEND CREEK 8700 11.7 8.8 133 17.2 15.6 110 ----- ----- Basin wide percent of average 113 105 BIGHORN BASIN BALD MTN. 9380 19.9 23.5 85 18.0 21.5 84 BEAR TRAP MEADOW 8200 5.8 2.3 252 11.7 11.0 106 BLACKWATER 9780 30.1 28.9 104 27.8 24.8 112 BONE SPRINGS DIV 9350 17.8 18.3 97 17.1 18.4 93 EVENING STAR 9200 32.2 33.3 97 35.9 30.0 120 GRAVE SPRINGS 8550 9.7 11.0 88 12.2 13.2 92 KIRWIN 9550 15.9 12.9 123 18.7 14.3 131 MARQUETTE 8760 9.2 11.2 82 12.6 13.8 91 MIDDLE POWDER 7760 12.0 14.2 85 12.5 15.9 79 OWL CREEK 8975 5.2 3.9 133 9.8 8.3 118 POWDER RIVER PASS 9480 12.6 10.5 120 18.2 15.9 114 SHELL CREEK 9580 18.1 16.8 108 18.2 16.9 108 SYLVAN LAKE 8420 22.3 23.5 95 27.9 24.8 112 SYLVAN ROAD 7120 6.7 7.8 86 22.5 20.6 109 TIMBER CREEK 7950 5.4 4.8 113 11.9 10.6 112 YOUNTS PEAK 8350 20.5 18.1 113 19.3 18.9 102 ----- ----- Basin wide percent of average 101 106 SHOSHONE RIVER BLACKWATER 9780 30.1 28.9 104 27.8 24.8 112 EVENING STAR 9200 32.2 33.3 97 35.9 30.0 120 KIRWIN 9550 15.9 12.9 123 18.7 14.3 131 MARQUETTE 8760 9.2 11.2 82 12.6 13.8 91 SYLVAN LAKE 8420 22.3 23.5 95 27.9 24.8 112 SYLVAN ROAD 7120 6.7 7.8 86 22.5 20.6 109 YOUNTS PEAK 8350 20.5 18.1 113 19.3 18.9 102 ----- ----- Basin wide percent of average 101 112 POWDER-TONGUE BEAR TRAP MEADOW 8200 5.8 2.3 252 11.7 11.0 106 BIG GOOSE 7990 10.8 11.5 94 15.7 13.0 121 BONE SPRINGS DIV 9350 17.8 18.3 97 17.1 18.4 93 BURGESS JUNCTION 7880 13.4 13.1 102 15.4 15.5 99 CLOUD PEAK RESERVOIR 9860 19.7 16.2 122 20.7 17.3 120 DOME LAKE 8880 12.8 13.3 96 18.6 16.9 110 GRAVE SPRINGS 8550 9.7 11.0 88 12.2 13.2 92 HANSEN SAWMILL 8360 4.0 4.7 85 12.9 11.1 116 MIDDLE POWDER 7760 12.0 14.2 85 12.5 15.9 79 POWDER RIVER PASS 9480 12.6 10.5 120 18.2 15.9 114 SUCKER CREEK 8880 15.8 12.9 122 20.5 17.6 116 TIE CREEK 6870 4.1 3.9 105 17.2 13.6 126 ----- ----- Basin wide percent of average 105 107 BELLE FOURCHE BLIND PARK 6890 -M 4.0 * 17.1 14.3 120 COLE CANYON 5910 4.7 4.5 104 14.8 9.6 154 NORTH RAPID CREEK 6130 1.9 3.4 56 16.8 11.5 146 ----- ----- Basin wide percent of average 84 138 UPPER N. PLATTE RIVER COLUMBINE 9160 18.0 20.5 88 32.1 29.3 110 DIVIDE PEAK 8880 26.9 19.0 142 33.0 24.4 135 ELK RIVER 8700 12.6 14.5 87 25.5 23.2 110 JOE WRIGHT 10120 27.2 25.1 108 34.1 30.3 113 NORTH FRENCH CREEK 10130 -M 34.5 * -M 29.9 * OLD BATTLE 10000 40.5 37.0 109 46.5 40.1 116 SAGE CREEK BASIN 7850 10.3 11.0 94 19.2 14.2 135 SOUTH BRUSH CREEK 8440 9.4 10.8 87 22.2 20.3 109 TOWER 10500 50.7 52.3 97 49.1 45.3 108 WEBBER SPRINGS 9250 24.9 24.8 100 35.4 31.3 113 WILLOW CREEK PASS 9540 13.2 14.1 94 15.3 15.8 97 ----- ----- Basin wide percent of average 102 114 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 26.1 28.1 93 27.1 27.1 100 CASPER MTN. 7900 14.1 16.9 83 17.5 19.7 89 DEADMAN HILL 10220 22.6 19.7 115 23.6 21.1 112 DEER PARK 9700 15.5 18.5 84 22.1 27.1 82 LAPRELE CREEK 8375 8.8 6.9 128 16.6 16.6 100 RENO HILL 8400 15.6 14.5 108 21.1 20.4 103 ROACH 9700 18.2 18.3 99 24.0 22.6 106 SAND LAKE 10050 36.8 37.0 99 36.0 29.5 122 SOUTH PASS 9040 15.7 17.8 88 19.6 22.8 86 WINDY PEAK 7900 9.4 4.7 200 14.8 13.6 109 ----- ----- Basin wide percent of average 100 101 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 2.2 4.3 51 22.7 18.7 121 DIVIDE PEAK 8880 26.9 19.0 142 33.0 24.4 135 OLD BATTLE 10000 40.5 37.0 109 46.5 40.1 116 SANDSTONE RS 8150 12.9 9.1 142 25.0 22.0 114 WHISKEY PARK 8950 32.4 30.4 107 40.2 34.0 118 ----- ----- Basin wide percent of average 115 120 UPPER GREEN RIVER BIG SANDY OPENING 9080 13.3 13.2 101 16.1 16.0 101 BLIND BULL SUM 8650 30.7 27.7 111 23.9 25.3 94 EAST RIM DIVIDE 7930 4.6 13.0 35 14.2 14.0 101 ELKHART PARK G.S. 9400 14.8 12.6 117 18.2 16.1 113 GROS VENTRE SUMMIT 8750 14.0 13.1 107 18.5 15.3 121 GUNSIGHT PASS 9820 17.5 -M * 19.9 -M * KENDALL R.S. 7740 5.6 9.6 58 16.5 16.6 99 LOOMIS PARK 8240 12.8 14.0 91 21.5 20.0 108 NEW FORK LAKE 8340 8.8 8.2 107 13.5 13.5 100 SNIDER BASIN 8060 13.0 12.4 105 17.5 18.6 94 SPRING CREEK DIVIDE 9000 32.5 28.4 114 31.6 30.3 104 TRIPLE PEAK 8500 23.5 23.4 100 31.3 28.8 109 ----- ----- Basin wide percent of average 99 104 LOWER GREEN RIVER HAMS FORK 7840 6.2 5.6 111 15.1 14.8 102 HEWINTA 9519 4.8 9.0 53 17.1 17.9 96 HICKERSON PARK 9145 3.5 5.4 65 13.3 10.3 129 HOLE-IN-ROCK 9150 3.7 4.5 82 12.7 9.8 130 INDIAN CREEK 9425 -M 28.1 * 26.4 29.6 89 KELLEY R.S. 8180 14.9 13.8 108 21.5 23.7 91 STEEL CREEK PARK 10200 17.3 18.7 93 20.8 20.3 102 ----- ----- Basin wide percent of average 88 100 UPPER BEAR RIVER BUG LAKE 7950 17.2 17.6 98 21.4 22.5 95 HAYDEN FORK 9212 10.0 12.6 79 27.0 25.3 107 KELLEY R.S. 8180 14.9 13.8 108 21.5 23.7 91 LILY LAKE 9156 11.7 10.8 108 21.4 21.2 101 MONTE CRISTO 8960 26.9 28.0 96 31.7 30.4 104 SALT RIVER SUMMIT 7760 13.8 10.3 134 19.8 21.7 91 TRIAL LAKE 9992 26.1 26.4 99 29.2 29.6 99 ----- ----- Basin wide percent of average 101 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.