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 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 15.7 17.9 88 19.9 22.2 90 COTTONWOOD CREEK 7670 27.0 24.4 111 31.6 28.6 110 GRAND TARGHEE 9260 45.0 -M * 34.7 -M * GRANITE CREEK 6770 16.7 18.2 92 21.3 20.5 104 GRASSY LAKE 7265 33.2 36.9 90 35.4 37.3 95 GROS VENTRE SUMMIT 8750 -M 14.6 * 15.9 13.5 118 GUNSIGHT PASS 9820 15.3 -M * 16.4 -M * LEWIS LAKE DIVIDE 7850 32.0 36.5 88 34.0 38.1 89 PHILLIPS BENCH 8200 28.5 30.0 95 29.9 30.2 99 SALT RIVER SUMMIT 7760 15.5 14.9 104 16.9 19.6 86 SNAKE RIVER STATION 6920 17.6 18.9 93 22.7 23.1 98 SPRING CREEK DIVIDE 9000 28.4 27.7 103 27.3 27.5 99 THUMB DIVIDE 7980 20.9 19.3 108 21.6 19.7 110 TOGWOTEE PASS 9580 28.1 25.9 108 30.4 25.7 118 TWO OCEAN PLATEAU 9240 39.2 29.4 133 30.2 28.8 105 WILLOW CREEK 8380 35.9 31.3 115 40.0 33.5 119 ----- ----- Basin wide percent of average 102 102 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 23.9 24.4 98 21.8 20.9 104 BLACK BEAR 8170 36.4 40.5 90 36.8 42.0 88 CANYON 7870 14.0 14.0 100 15.3 16.0 96 FISHER CREEK 9100 37.4 36.3 103 36.6 37.8 97 MADISON PLATEAU 7750 23.7 26.0 91 25.2 27.9 90 NORTHEAST ENTRANCE 7350 11.2 11.2 100 13.9 13.2 105 PARKER PEAK 9400 27.1 22.5 120 20.3 17.0 119 SYLVAN LAKE 8420 21.6 23.3 93 23.9 21.8 110 THUMB DIVIDE 7980 20.9 19.3 108 21.6 19.7 110 TWO OCEAN PLATEAU 9240 39.2 29.4 133 30.2 28.8 105 WHISKEY CREEK 6800 17.5 17.7 99 20.9 21.9 95 WHITE MILL 8700 -M 25.2 * -M 28.1 * WOLVERINE 7650 12.4 11.7 106 12.6 13.3 95 ----- ----- Basin wide percent of average 103 100 WIND RIVER BURROUGHS CREEK 8750 16.2 15.0 108 16.9 17.0 99 COLD SPRINGS 9630 8.3 8.5 98 11.0 11.2 98 DEER PARK 9700 13.5 17.3 78 18.4 23.0 80 HOBBS PARK 10100 15.3 15.8 97 15.3 13.6 112 LITTLE WARM 9370 12.3 12.3 100 15.2 14.0 109 SOUTH PASS 9040 14.5 17.3 84 16.2 19.3 84 ST. LAWRENCE ALT 8620 7.3 7.5 97 10.6 9.4 113 TOGWOTEE PASS 9580 28.1 25.9 108 30.4 25.7 118 TOWNSEND CREEK 8700 10.8 9.5 114 13.6 12.4 110 ----- ----- Basin wide percent of average 98 101 BIGHORN BASIN BALD MTN. 9380 20.0 20.7 97 16.3 18.2 90 BEAR TRAP MEADOW 8200 9.7 5.2 187 10.3 8.8 117 BLACKWATER 9780 26.2 25.6 102 23.7 21.5 110 BONE SPRINGS DIV 9350 18.6 16.9 110 15.3 15.4 99 EVENING STAR 9200 31.3 30.9 101 32.3 26.4 122 GRAVE SPRINGS 8550 10.5 10.0 105 11.1 10.3 108 KIRWIN 9550 13.5 11.9 113 15.0 11.8 127 MARQUETTE 8760 7.6 9.7 78 9.7 10.5 92 MIDDLE POWDER 7760 12.9 12.7 102 11.0 13.0 85 OWL CREEK 8975 6.1 5.7 107 5.8 6.3 92 POWDER RIVER PASS 9480 12.9 11.4 113 15.1 13.0 116 SHELL CREEK 9580 17.5 15.3 114 16.4 14.0 117 SYLVAN LAKE 8420 21.6 23.3 93 23.9 21.8 110 SYLVAN ROAD 7120 14.5 12.7 114 19.9 18.3 109 TIMBER CREEK 7950 4.9 5.9 83 8.4 7.8 108 YOUNTS PEAK 8350 18.4 17.7 104 16.2 16.8 96 ----- ----- Basin wide percent of average 104 107 SHOSHONE RIVER BLACKWATER 9780 26.2 25.6 102 23.7 21.5 110 EVENING STAR 9200 31.3 30.9 101 32.3 26.4 122 KIRWIN 9550 13.5 11.9 113 15.0 11.8 127 MARQUETTE 8760 7.6 9.7 78 9.7 10.5 92 SYLVAN LAKE 8420 21.6 23.3 93 23.9 21.8 110 SYLVAN ROAD 7120 14.5 12.7 114 19.9 18.3 109 YOUNTS PEAK 8350 18.4 17.7 104 16.2 16.8 96 ----- ----- Basin wide percent of average 101 111 POWDER-TONGUE BEAR TRAP MEADOW 8200 9.7 5.2 187 10.3 8.8 117 BIG GOOSE 7990 12.3 11.5 107 14.5 9.3 156 BONE SPRINGS DIV 9350 18.6 16.9 110 15.3 15.4 99 BURGESS JUNCTION 7880 14.0 12.4 113 14.3 12.8 112 CLOUD PEAK RESERVOIR 9860 19.3 14.2 136 18.0 13.6 132 DOME LAKE 8880 14.8 13.1 113 17.0 13.9 122 GRAVE SPRINGS 8550 10.5 10.0 105 11.1 10.3 108 HANSEN SAWMILL 8360 8.0 6.5 123 11.1 8.7 128 MIDDLE POWDER 7760 12.9 12.7 102 11.0 13.0 85 POWDER RIVER PASS 9480 12.9 11.4 113 15.1 13.0 116 SUCKER CREEK 8880 16.7 12.5 134 18.7 14.3 131 TIE CREEK 6870 8.2 6.2 132 15.9 10.5 151 ----- ----- Basin wide percent of average 119 120 BELLE FOURCHE BLIND PARK 6890 7.1 8.2 87 15.2 11.6 131 COLE CANYON 5910 7.8 7.1 110 13.5 7.0 193 NORTH RAPID CREEK 6130 11.0 8.7 126 14.8 8.9 166 ----- ----- Basin wide percent of average 108 158 UPPER N. PLATTE RIVER COLUMBINE 9160 28.6 25.1 114 28.6 26.1 110 DIVIDE PEAK 8880 25.9 20.5 126 27.3 21.5 127 ELK RIVER 8700 23.8 20.1 118 23.1 20.4 113 JOE WRIGHT 10120 24.5 22.4 109 29.6 25.8 115 NORTH FRENCH CREEK 10130 36.2 30.9 117 33.0 25.6 129 OLD BATTLE 10000 36.4 33.4 109 40.7 35.8 114 SAGE CREEK BASIN 7850 14.5 11.9 122 15.0 12.5 120 SOUTH BRUSH CREEK 8440 13.6 13.4 101 17.8 17.2 103 TOWER 10500 47.2 47.5 99 43.8 39.9 110 WEBBER SPRINGS 9250 27.3 26.4 103 31.0 27.8 112 WILLOW CREEK PASS 9540 13.7 12.8 107 13.6 13.4 101 ----- ----- Basin wide percent of average 110 114 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 25.0 25.0 100 23.2 23.1 100 CASPER MTN. 7900 14.5 15.5 94 14.7 15.3 96 DEADMAN HILL 10220 17.5 17.3 101 17.8 17.7 101 DEER PARK 9700 13.5 17.3 78 18.4 23.0 80 LAPRELE CREEK 8375 9.8 10.9 90 13.7 13.3 103 RENO HILL 8400 16.6 15.1 110 17.6 15.9 111 ROACH 9700 17.2 17.9 96 19.5 19.4 101 SAND LAKE 10050 32.7 33.8 97 29.9 25.2 119 SOUTH PASS 9040 14.5 17.3 84 16.2 19.3 84 WINDY PEAK 7900 10.1 8.4 120 11.4 11.1 103 ----- ----- Basin wide percent of average 96 100 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 18.4 10.2 180 19.1 16.5 116 DIVIDE PEAK 8880 25.9 20.5 126 27.3 21.5 127 OLD BATTLE 10000 36.4 33.4 109 40.7 35.8 114 SANDSTONE RS 8150 20.3 14.4 141 21.2 19.4 109 WHISKEY PARK 8950 35.4 30.7 115 35.6 29.8 119 ----- ----- Basin wide percent of average 125 117 UPPER GREEN RIVER BIG SANDY OPENING 9080 12.6 15.1 83 12.5 13.9 90 BLIND BULL SUM 8650 27.7 28.8 96 20.4 23.1 88 EAST RIM DIVIDE 7930 10.5 13.6 77 12.4 12.5 99 ELKHART PARK G.S. 9400 13.5 13.9 97 14.7 13.9 106 GROS VENTRE SUMMIT 8750 -M 14.6 * 15.9 13.5 118 GUNSIGHT PASS 9820 15.3 -M * 16.4 -M * KENDALL R.S. 7740 11.7 14.3 82 14.1 15.1 93 LOOMIS PARK 8240 16.9 17.5 97 19.1 18.1 106 NEW FORK LAKE 8340 12.2 11.5 106 11.1 11.8 94 SNIDER BASIN 8060 15.2 15.0 101 15.5 16.8 92 SPRING CREEK DIVIDE 9000 28.4 27.7 103 27.3 27.5 99 TRIPLE PEAK 8500 24.9 25.7 97 27.0 25.8 105 ----- ----- Basin wide percent of average 95 99 LOWER GREEN RIVER HAMS FORK 7840 11.6 11.3 103 12.6 12.7 99 HEWINTA 9519 12.2 12.5 98 14.4 15.3 94 HICKERSON PARK 9145 5.9 8.2 72 9.6 8.4 114 HOLE-IN-ROCK 9150 6.4 7.4 86 9.5 7.9 120 INDIAN CREEK 9425 25.8 29.0 89 23.1 26.5 87 KELLEY R.S. 8180 17.2 17.4 99 18.9 21.2 89 STEEL CREEK PARK 10200 14.5 16.5 88 17.5 17.2 102 ----- ----- Basin wide percent of average 91 97 UPPER BEAR RIVER BUG LAKE 7950 20.1 21.7 93 18.8 20.0 94 HAYDEN FORK 9212 17.4 16.9 103 22.8 22.0 104 KELLEY R.S. 8180 17.2 17.4 99 18.9 21.2 89 LILY LAKE 9156 16.1 14.4 112 17.8 18.4 97 MONTE CRISTO 8960 28.3 30.5 93 27.7 26.6 104 SALT RIVER SUMMIT 7760 15.5 14.9 104 16.9 19.6 86 TRIAL LAKE 9992 24.9 25.9 96 23.4 26.0 90 ----- ----- Basin wide percent of average 98 95 ----------------------------------------------------------------------------- -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.