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 WEDNESDAY: APRIL 29 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 10.4 13.3 78 22.0 24.1 91 COTTONWOOD CREEK 7670 27.5 20.7 133 36.1 31.5 115 GRAND TARGHEE 9260 51.9 -M * 39.8 -M * GRANITE CREEK 6770 12.7 13.8 92 23.6 22.1 107 GRASSY LAKE 7265 31.4 34.4 91 39.2 40.5 97 GROS VENTRE SUMMIT 8750 13.9 13.7 101 18.0 15.0 120 GUNSIGHT PASS 9820 16.8 -M * 19.2 -M * LEWIS LAKE DIVIDE 7850 34.4 35.3 97 37.7 41.2 92 PHILLIPS BENCH 8200 30.3 30.0 101 33.8 32.7 103 SALT RIVER SUMMIT 7760 13.8 11.6 119 19.2 21.4 90 SNAKE RIVER STATION 6920 12.5 13.4 93 25.7 25.2 102 SPRING CREEK DIVIDE 9000 32.1 28.8 111 31.2 29.9 104 THUMB DIVIDE 7980 20.2 15.9 127 25.0 21.7 115 TOGWOTEE PASS 9580 31.0 27.8 112 34.0 28.6 119 TWO OCEAN PLATEAU 9240 43.4 31.7 137 33.9 31.7 107 WILLOW CREEK 8380 34.8 31.2 112 45.5 37.1 123 ----- ----- Basin wide percent of average 108 106 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 25.8 25.9 100 23.9 23.2 103 BLACK BEAR 8170 39.3 40.5 97 40.8 45.4 90 CANYON 7870 14.5 11.9 122 18.3 17.5 105 FISHER CREEK 9100 39.4 37.8 104 39.6 41.4 96 MADISON PLATEAU 7750 25.3 24.9 102 28.9 30.1 96 NORTHEAST ENTRANCE 7350 5.5 7.8 71 15.6 14.6 107 PARKER PEAK 9400 31.1 24.4 127 21.9 19.2 114 SYLVAN LAKE 8420 21.6 24.0 90 27.3 24.3 112 THUMB DIVIDE 7980 20.2 15.9 127 25.0 21.7 115 TWO OCEAN PLATEAU 9240 43.4 31.7 137 33.9 31.7 107 WHISKEY CREEK 6800 18.6 15.9 117 24.0 23.9 100 WHITE MILL 8700 26.8 26.4 102 27.2 30.8 88 WOLVERINE 7650 9.1 7.8 117 14.6 14.9 98 ----- ----- Basin wide percent of average 109 101 WIND RIVER BURROUGHS CREEK 8750 18.1 14.1 128 19.9 19.0 105 COLD SPRINGS 9630 9.7 4.8 202 14.8 13.6 109 DEER PARK 9700 15.3 19.1 80 21.8 26.5 82 HOBBS PARK 10100 18.5 18.0 103 20.0 16.5 121 LITTLE WARM 9370 13.4 11.5 117 18.5 16.4 113 SOUTH PASS 9040 15.7 18.2 86 19.4 22.2 87 ST. LAWRENCE ALT 8620 8.2 6.4 128 14.3 11.7 122 TOGWOTEE PASS 9580 31.0 27.8 112 34.0 28.6 119 TOWNSEND CREEK 8700 11.8 9.6 123 17.1 15.1 113 ----- ----- Basin wide percent of average 109 106 BIGHORN BASIN BALD MTN. 9380 19.5 23.4 83 17.2 20.9 82 BEAR TRAP MEADOW 8200 5.4 2.8 193 11.1 10.6 105 BLACKWATER 9780 29.3 28.4 103 27.0 24.3 111 BONE SPRINGS DIV 9350 17.2 18.2 95 16.5 17.9 92 EVENING STAR 9200 31.8 33.0 96 35.3 29.5 120 GRAVE SPRINGS 8550 9.6 11.0 87 11.9 12.8 93 KIRWIN 9550 15.2 13.0 117 17.8 13.9 128 MARQUETTE 8760 8.6 11.1 77 12.1 13.3 91 MIDDLE POWDER 7760 11.7 14.6 80 12.1 15.4 79 OWL CREEK 8975 5.0 4.0 125 9.4 7.9 119 POWDER RIVER PASS 9480 11.7 11.1 105 17.2 15.4 112 SHELL CREEK 9580 17.7 16.8 105 17.5 16.4 107 SYLVAN LAKE 8420 21.6 24.0 90 27.3 24.3 112 SYLVAN ROAD 7120 7.0 8.9 79 21.8 20.2 108 TIMBER CREEK 7950 4.8 4.9 98 11.2 10.1 111 YOUNTS PEAK 8350 20.1 18.2 110 18.8 18.5 102 ----- ----- Basin wide percent of average 97 105 SHOSHONE RIVER BLACKWATER 9780 29.3 28.4 103 27.0 24.3 111 EVENING STAR 9200 31.8 33.0 96 35.3 29.5 120 KIRWIN 9550 15.2 13.0 117 17.8 13.9 128 MARQUETTE 8760 8.6 11.1 77 12.1 13.3 91 SYLVAN LAKE 8420 21.6 24.0 90 27.3 24.3 112 SYLVAN ROAD 7120 7.0 8.9 79 21.8 20.2 108 YOUNTS PEAK 8350 20.1 18.2 110 18.8 18.5 102 ----- ----- Basin wide percent of average 98 111 POWDER-TONGUE BEAR TRAP MEADOW 8200 5.4 2.8 193 11.1 10.6 105 BIG GOOSE 7990 10.9 12.0 91 15.5 12.5 124 BONE SPRINGS DIV 9350 17.2 18.2 95 16.5 17.9 92 BURGESS JUNCTION 7880 13.2 13.4 99 15.0 15.1 99 CLOUD PEAK RESERVOIR 9860 19.0 16.3 117 20.2 16.6 122 DOME LAKE 8880 12.6 13.8 91 18.1 16.4 110 GRAVE SPRINGS 8550 9.6 11.0 87 11.9 12.8 93 HANSEN SAWMILL 8360 3.7 5.1 73 12.1 10.7 113 MIDDLE POWDER 7760 11.7 14.6 80 12.1 15.4 79 POWDER RIVER PASS 9480 11.7 11.1 105 17.2 15.4 112 SUCKER CREEK 8880 15.8 13.4 118 20.1 17.0 118 TIE CREEK 6870 4.1 4.5 91 16.9 13.1 129 ----- ----- Basin wide percent of average 99 108 BELLE FOURCHE BLIND PARK 6890 -M 4.8 * 17.1 13.8 124 COLE CANYON 5910 5.5 5.6 98 14.8 9.1 163 NORTH RAPID CREEK 6130 4.0 5.1 78 16.9 11.0 154 ----- ----- Basin wide percent of average 89 144 UPPER N. PLATTE RIVER COLUMBINE 9160 21.7 22.0 99 31.2 28.8 108 DIVIDE PEAK 8880 26.9 20.0 134 32.1 23.9 134 ELK RIVER 8700 15.9 16.2 98 25.1 22.7 111 JOE WRIGHT 10120 26.8 25.0 107 33.1 29.5 112 NORTH FRENCH CREEK 10130 38.8 34.3 113 37.3 29.1 128 OLD BATTLE 10000 39.9 36.5 109 45.8 39.4 116 SAGE CREEK BASIN 7850 12.7 11.6 109 18.4 13.9 132 SOUTH BRUSH CREEK 8440 10.7 11.7 91 21.3 19.7 108 TOWER 10500 49.6 51.9 96 48.4 44.5 109 WEBBER SPRINGS 9250 26.7 25.6 104 34.8 30.7 113 WILLOW CREEK PASS 9540 13.9 14.3 97 15.1 15.4 98 ----- ----- Basin wide percent of average 105 115 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 26.3 28.3 93 26.3 26.5 99 CASPER MTN. 7900 14.9 17.5 85 17.5 19.0 92 DEADMAN HILL 10220 22.4 19.5 115 22.7 20.5 111 DEER PARK 9700 15.3 19.1 80 21.8 26.5 82 LAPRELE CREEK 8375 9.5 7.8 122 16.5 16.0 103 RENO HILL 8400 16.2 15.3 106 21.2 19.7 108 ROACH 9700 18.8 18.7 101 23.3 22.0 106 SAND LAKE 10050 36.2 36.8 98 35.2 28.8 122 SOUTH PASS 9040 15.7 18.2 86 19.4 22.2 87 WINDY PEAK 7900 9.6 5.7 168 14.5 13.2 110 ----- ----- Basin wide percent of average 99 102 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 7.2 5.4 133 21.8 18.3 119 DIVIDE PEAK 8880 26.9 20.0 134 32.1 23.9 134 OLD BATTLE 10000 39.9 36.5 109 45.8 39.4 116 SANDSTONE RS 8150 16.2 10.5 154 24.2 21.6 112 WHISKEY PARK 8950 32.8 30.7 107 39.1 33.3 117 ----- ----- Basin wide percent of average 119 119 UPPER GREEN RIVER BIG SANDY OPENING 9080 13.0 14.1 92 15.5 15.6 99 BLIND BULL SUM 8650 30.0 28.2 106 23.5 24.9 94 EAST RIM DIVIDE 7930 5.7 13.6 42 14.0 13.7 102 ELKHART PARK G.S. 9400 13.9 13.3 105 17.6 15.7 112 GROS VENTRE SUMMIT 8750 13.9 13.7 101 18.0 15.0 120 GUNSIGHT PASS 9820 16.8 -M * 19.2 -M * KENDALL R.S. 7740 6.6 10.9 61 16.0 16.4 98 LOOMIS PARK 8240 13.4 15.0 89 21.1 19.7 107 NEW FORK LAKE 8340 9.2 9.2 100 12.8 13.2 97 SNIDER BASIN 8060 13.6 13.3 102 17.2 18.3 94 SPRING CREEK DIVIDE 9000 32.1 28.8 111 31.2 29.9 104 TRIPLE PEAK 8500 23.8 24.5 97 30.8 28.3 109 ----- ----- Basin wide percent of average 95 103 LOWER GREEN RIVER HAMS FORK 7840 7.4 6.9 107 14.7 14.5 101 HEWINTA 9519 7.4 10.1 73 16.6 17.5 95 HICKERSON PARK 9145 5.2 6.4 81 13.1 10.0 131 HOLE-IN-ROCK 9150 5.3 5.4 98 12.5 9.5 132 INDIAN CREEK 9425 -M 28.9 * 26.0 29.1 89 KELLEY R.S. 8180 15.0 14.9 101 21.0 23.3 90 STEEL CREEK PARK 10200 16.8 18.4 91 20.3 19.9 102 ----- ----- Basin wide percent of average 92 100 UPPER BEAR RIVER BUG LAKE 7950 18.3 19.1 96 21.0 22.1 95 HAYDEN FORK 9212 13.1 13.9 94 26.3 24.8 106 KELLEY R.S. 8180 15.0 14.9 101 21.0 23.3 90 LILY LAKE 9156 13.0 12.0 108 20.9 20.8 100 MONTE CRISTO 8960 27.7 29.0 96 31.1 29.8 104 SALT RIVER SUMMIT 7760 13.8 11.6 119 19.2 21.4 90 TRIAL LAKE 9992 26.7 26.6 100 28.1 29.0 97 ----- ----- Basin wide percent of average 100 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.