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: MARCH 18 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 14.5 17.5 83 17.2 20.3 85 COTTONWOOD CREEK 7670 22.7 21.9 104 26.2 25.4 103 GRAND TARGHEE 9260 36.5 -M * 29.2 -M * GRANITE CREEK 6770 15.0 18.1 83 19.2 19.0 101 GRASSY LAKE 7265 29.1 33.3 87 31.5 33.9 93 GROS VENTRE SUMMIT 8750 10.8 13.1 82 13.0 12.0 108 GUNSIGHT PASS 9820 12.8 -M * 13.5 -M * LEWIS LAKE DIVIDE 7850 27.2 33.2 82 29.3 34.7 84 PHILLIPS BENCH 8200 23.5 26.9 87 25.3 27.2 93 SALT RIVER SUMMIT 7760 12.3 13.5 91 13.7 17.4 79 SNAKE RIVER STATION 6920 16.0 18.5 86 20.1 21.1 95 SPRING CREEK DIVIDE 9000 23.5 24.7 95 23.4 24.7 95 THUMB DIVIDE 7980 17.7 17.7 100 18.5 17.7 105 TOGWOTEE PASS 9580 24.4 23.0 106 26.4 22.8 116 TWO OCEAN PLATEAU 9240 33.9 25.9 131 24.5 25.9 95 WILLOW CREEK 8380 29.5 28.3 104 34.0 29.9 114 ----- ----- Basin wide percent of average 95 97 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 21.4 22.2 96 19.6 18.8 104 BLACK BEAR 8170 32.4 36.8 88 31.3 37.4 84 CANYON 7870 12.7 12.9 98 13.6 14.4 94 FISHER CREEK 9100 34.5 32.7 106 33.4 33.9 99 MADISON PLATEAU 7750 19.6 23.4 84 21.3 24.7 86 NORTHEAST ENTRANCE 7350 10.7 10.7 100 12.7 11.8 108 PARKER PEAK 9400 24.1 20.1 120 18.3 15.1 121 SYLVAN LAKE 8420 18.4 20.9 88 20.5 19.6 105 THUMB DIVIDE 7980 17.7 17.7 100 18.5 17.7 105 TWO OCEAN PLATEAU 9240 33.9 25.9 131 24.5 25.9 95 WHISKEY CREEK 6800 14.5 16.1 90 17.8 19.5 91 WHITE MILL 8700 22.7 22.7 100 22.4 25.2 89 WOLVERINE 7650 10.8 11.4 95 10.9 12.1 90 ----- ----- Basin wide percent of average 100 96 WIND RIVER BURROUGHS CREEK 8750 14.3 13.8 104 14.9 15.1 99 COLD SPRINGS 9630 6.2 8.2 76 8.2 9.4 87 DEER PARK 9700 8.7 15.3 57 13.4 20.1 67 HOBBS PARK 10100 9.2 13.3 69 9.4 11.2 84 LITTLE WARM 9370 9.8 10.8 91 12.3 12.1 102 SOUTH PASS 9040 9.4 15.5 61 11.3 16.7 68 ST. LAWRENCE ALT 8620 3.0 6.7 45 6.1 7.8 78 TOGWOTEE PASS 9580 24.4 23.0 106 26.4 22.8 116 TOWNSEND CREEK 8700 5.8 7.8 74 8.0 10.1 79 ----- ----- Basin wide percent of average 79 88 BIGHORN BASIN BALD MTN. 9380 16.4 17.8 92 13.6 15.8 86 BEAR TRAP MEADOW 8200 7.8 5.0 156 8.1 7.2 112 BLACKWATER 9780 22.3 22.7 98 20.2 19.0 106 BONE SPRINGS DIV 9350 16.7 14.6 114 13.1 13.1 100 EVENING STAR 9200 27.5 27.7 99 28.1 23.7 119 GRAVE SPRINGS 8550 7.4 8.3 89 8.3 8.8 94 KIRWIN 9550 10.6 10.3 103 11.9 10.2 117 MARQUETTE 8760 3.2 7.7 42 6.6 8.4 79 MIDDLE POWDER 7760 9.0 10.3 87 9.1 10.9 83 OWL CREEK 8975 4.5 4.8 94 4.5 5.0 90 POWDER RIVER PASS 9480 11.4 9.9 115 12.9 11.1 116 SHELL CREEK 9580 15.0 13.3 113 14.3 12.0 119 SYLVAN LAKE 8420 18.4 20.9 88 20.5 19.6 105 SYLVAN ROAD 7120 13.7 12.2 112 17.3 16.7 104 TIMBER CREEK 7950 3.0 4.9 61 7.0 6.3 111 YOUNTS PEAK 8350 16.9 16.0 106 15.0 15.0 100 ----- ----- Basin wide percent of average 99 104 SHOSHONE RIVER BLACKWATER 9780 22.3 22.7 98 20.2 19.0 106 EVENING STAR 9200 27.5 27.7 99 28.1 23.7 119 KIRWIN 9550 10.6 10.3 103 11.9 10.2 117 MARQUETTE 8760 3.2 7.7 42 6.6 8.4 79 SYLVAN LAKE 8420 18.4 20.9 88 20.5 19.6 105 SYLVAN ROAD 7120 13.7 12.2 112 17.3 16.7 104 YOUNTS PEAK 8350 16.9 16.0 106 15.0 15.0 100 ----- ----- Basin wide percent of average 96 106 POWDER-TONGUE BEAR TRAP MEADOW 8200 7.8 5.0 156 8.1 7.2 112 BIG GOOSE 7990 6.8 8.9 76 9.3 7.5 124 BONE SPRINGS DIV 9350 16.7 14.6 114 13.1 13.1 100 BURGESS JUNCTION 7880 10.0 10.2 98 10.6 10.7 99 CLOUD PEAK RESERVOIR 9860 14.7 11.6 127 14.0 11.2 125 DOME LAKE 8880 10.4 10.8 96 12.6 11.5 110 GRAVE SPRINGS 8550 7.4 8.3 89 8.3 8.8 94 HANSEN SAWMILL 8360 5.7 5.9 97 8.6 7.2 119 MIDDLE POWDER 7760 9.0 10.3 87 9.1 10.9 83 POWDER RIVER PASS 9480 11.4 9.9 115 12.9 11.1 116 SUCKER CREEK 8880 11.8 10.3 115 14.1 11.9 118 TIE CREEK 6870 4.2 5.9 71 11.0 8.8 125 ----- ----- Basin wide percent of average 104 110 BELLE FOURCHE BLIND PARK 6890 7.8 8.4 93 13.4 10.2 131 COLE CANYON 5910 5.6 6.3 89 10.5 6.1 172 NORTH RAPID CREEK 6130 8.2 7.6 108 11.9 8.0 149 ----- ----- Basin wide percent of average 97 147 UPPER N. PLATTE RIVER COLUMBINE 9160 25.0 24.0 104 23.6 23.2 102 DIVIDE PEAK 8880 19.5 18.0 108 21.4 19.0 113 ELK RIVER 8700 22.5 18.0 125 19.5 18.0 108 JOE WRIGHT 10120 19.8 19.3 103 24.2 22.5 108 NORTH FRENCH CREEK 10130 29.9 26.0 115 27.8 22.6 123 OLD BATTLE 10000 28.5 29.6 96 34.0 31.9 107 SAGE CREEK BASIN 7850 10.6 10.4 102 12.4 11.0 113 SOUTH BRUSH CREEK 8440 11.2 11.9 94 13.7 14.8 93 TOWER 10500 38.2 41.7 92 37.7 35.4 106 WEBBER SPRINGS 9250 21.4 24.6 87 25.1 24.5 102 WILLOW CREEK PASS 9540 11.0 10.8 102 10.5 11.6 91 ----- ----- Basin wide percent of average 101 107 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 19.5 21.3 92 18.3 19.8 92 CASPER MTN. 7900 8.5 12.7 67 10.6 12.6 84 DEADMAN HILL 10220 14.1 14.6 97 14.5 15.1 96 DEER PARK 9700 8.7 15.3 57 13.4 20.1 67 LAPRELE CREEK 8375 8.0 10.1 79 8.9 11.3 79 RENO HILL 8400 9.0 12.2 74 10.6 13.1 81 ROACH 9700 13.7 15.5 88 15.7 16.9 93 SAND LAKE 10050 25.3 29.2 87 23.7 21.7 109 SOUTH PASS 9040 9.4 15.5 61 11.3 16.7 68 WINDY PEAK 7900 6.9 7.3 95 7.9 9.5 83 ----- ----- Basin wide percent of average 80 86 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 16.3 11.4 143 15.6 14.2 110 DIVIDE PEAK 8880 19.5 18.0 108 21.4 19.0 113 OLD BATTLE 10000 28.5 29.6 96 34.0 31.9 107 SANDSTONE RS 8150 15.2 14.4 106 17.5 17.4 101 WHISKEY PARK 8950 29.8 27.7 108 29.2 26.2 111 ----- ----- Basin wide percent of average 108 108 UPPER GREEN RIVER BIG SANDY OPENING 9080 11.0 13.5 81 10.9 12.5 87 BLIND BULL SUM 8650 22.6 26.1 87 17.9 20.8 86 EAST RIM DIVIDE 7930 8.8 12.3 72 11.0 11.3 97 ELKHART PARK G.S. 9400 11.4 12.5 91 12.4 12.2 102 GROS VENTRE SUMMIT 8750 10.8 13.1 82 13.0 12.0 108 GUNSIGHT PASS 9820 12.8 -M * 13.5 -M * KENDALL R.S. 7740 10.3 14.1 73 12.3 13.8 89 LOOMIS PARK 8240 15.1 16.4 92 16.8 16.3 103 NEW FORK LAKE 8340 10.3 10.6 97 9.8 10.6 92 SNIDER BASIN 8060 12.7 13.8 92 13.2 15.0 88 SPRING CREEK DIVIDE 9000 23.5 24.7 95 23.4 24.7 95 TRIPLE PEAK 8500 21.7 23.4 93 23.6 23.1 102 ----- ----- Basin wide percent of average 88 95 LOWER GREEN RIVER HAMS FORK 7840 9.8 12.3 80 10.0 11.4 88 HEWINTA 9519 6.8 10.6 64 10.2 13.1 78 HICKERSON PARK 9145 2.8 6.6 42 5.8 7.0 83 HOLE-IN-ROCK 9150 3.3 6.4 52 6.0 6.6 91 INDIAN CREEK 9425 20.4 25.5 80 18.5 23.4 79 KELLEY R.S. 8180 13.2 15.8 84 14.9 18.9 79 STEEL CREEK PARK 10200 9.3 14.4 65 12.5 14.5 86 ----- ----- Basin wide percent of average 72 82 UPPER BEAR RIVER BUG LAKE 7950 16.4 19.4 85 15.1 17.9 84 HAYDEN FORK 9212 14.0 15.1 93 17.1 19.1 90 KELLEY R.S. 8180 13.2 15.8 84 14.9 18.9 79 LILY LAKE 9156 11.4 12.1 94 13.2 15.9 83 MONTE CRISTO 8960 22.1 28.0 79 21.9 23.5 93 SALT RIVER SUMMIT 7760 12.3 13.5 91 13.7 17.4 79 TRIAL LAKE 9992 19.4 23.3 83 18.8 23.0 82 ----- ----- Basin wide percent of average 86 85 ----------------------------------------------------------------------------- -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.