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 THURSDAY: MARCH 12 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 13.6 17.0 80 16.5 19.7 84 COTTONWOOD CREEK 7670 22.6 20.6 110 26.1 24.5 107 GRAND TARGHEE 9260 35.2 -M * 28.0 -M * GRANITE CREEK 6770 14.7 17.4 84 18.9 18.4 103 GRASSY LAKE 7265 28.0 31.9 88 30.3 32.8 92 GROS VENTRE SUMMIT 8750 10.1 12.5 81 12.2 11.5 106 GUNSIGHT PASS 9820 12.4 -M * 13.1 -M * LEWIS LAKE DIVIDE 7850 24.8 31.9 78 26.9 33.5 80 PHILLIPS BENCH 8200 22.5 25.8 87 24.3 26.2 93 SALT RIVER SUMMIT 7760 12.3 13.0 95 13.5 16.8 80 SNAKE RIVER STATION 6920 15.3 17.8 86 19.1 20.5 93 SPRING CREEK DIVIDE 9000 23.4 23.8 98 23.1 23.8 97 THUMB DIVIDE 7980 15.8 16.9 93 16.8 17.1 98 TOGWOTEE PASS 9580 23.6 22.2 106 25.6 22.0 116 TWO OCEAN PLATEAU 9240 30.9 24.9 124 23.8 25.0 95 WILLOW CREEK 8380 29.7 27.3 109 33.7 28.8 117 ----- ----- Basin wide percent of average 95 97 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 19.9 21.4 93 18.3 18.2 101 BLACK BEAR 8170 31.0 35.6 87 30.3 35.9 84 CANYON 7870 12.1 12.4 98 12.9 13.9 93 FISHER CREEK 9100 32.5 31.7 103 30.7 32.7 94 MADISON PLATEAU 7750 18.6 22.7 82 20.3 23.7 86 NORTHEAST ENTRANCE 7350 10.1 10.5 96 12.2 11.4 107 PARKER PEAK 9400 22.5 19.6 115 17.1 14.6 117 SYLVAN LAKE 8420 17.2 20.1 86 19.4 19.0 102 THUMB DIVIDE 7980 15.8 16.9 93 16.8 17.1 98 TWO OCEAN PLATEAU 9240 30.9 24.9 124 23.8 25.0 95 WHISKEY CREEK 6800 13.8 15.7 88 17.2 18.7 92 WHITE MILL 8700 21.8 21.9 100 21.3 24.2 88 WOLVERINE 7650 10.8 11.3 96 10.3 11.8 87 ----- ----- Basin wide percent of average 97 94 WIND RIVER BURROUGHS CREEK 8750 13.7 13.4 102 14.4 14.6 99 COLD SPRINGS 9630 6.1 7.9 77 8.0 9.0 89 DEER PARK 9700 8.7 15.3 57 13.3 19.2 69 HOBBS PARK 10100 9.0 12.9 70 9.1 10.6 86 LITTLE WARM 9370 9.4 10.3 91 11.8 11.6 102 SOUTH PASS 9040 9.3 15.2 61 11.4 16.0 71 ST. LAWRENCE ALT 8620 -M 6.4 * -M 7.5 * TOGWOTEE PASS 9580 23.6 22.2 106 25.6 22.0 116 TOWNSEND CREEK 8700 5.4 7.5 72 7.7 9.6 80 ----- ----- Basin wide percent of average 81 90 BIGHORN BASIN BALD MTN. 9380 16.4 17.2 95 13.3 15.1 88 BEAR TRAP MEADOW 8200 7.7 4.8 160 8.0 6.9 116 BLACKWATER 9780 20.6 22.0 94 18.8 18.3 103 BONE SPRINGS DIV 9350 16.5 14.1 117 13.1 12.5 105 EVENING STAR 9200 25.7 26.8 96 26.8 23.0 117 GRAVE SPRINGS 8550 7.3 7.9 92 8.3 8.4 99 KIRWIN 9550 10.0 9.9 101 11.2 9.8 114 MARQUETTE 8760 3.2 7.4 43 6.0 8.0 75 MIDDLE POWDER 7760 9.0 9.8 92 8.5 10.4 82 OWL CREEK 8975 4.4 4.5 98 4.3 4.8 90 POWDER RIVER PASS 9480 11.4 9.4 121 12.8 10.7 120 SHELL CREEK 9580 14.8 12.6 117 14.3 11.5 124 SYLVAN LAKE 8420 17.2 20.1 86 19.4 19.0 102 SYLVAN ROAD 7120 13.1 12.0 109 16.1 16.3 99 TIMBER CREEK 7950 3.1 4.6 67 6.4 5.9 108 YOUNTS PEAK 8350 16.1 15.5 104 14.2 14.4 99 ----- ----- Basin wide percent of average 99 103 SHOSHONE RIVER BLACKWATER 9780 20.6 22.0 94 18.8 18.3 103 EVENING STAR 9200 25.7 26.8 96 26.8 23.0 117 KIRWIN 9550 10.0 9.9 101 11.2 9.8 114 MARQUETTE 8760 3.2 7.4 43 6.0 8.0 75 SYLVAN LAKE 8420 17.2 20.1 86 19.4 19.0 102 SYLVAN ROAD 7120 13.1 12.0 109 16.1 16.3 99 YOUNTS PEAK 8350 16.1 15.5 104 14.2 14.4 99 ----- ----- Basin wide percent of average 93 103 POWDER-TONGUE BEAR TRAP MEADOW 8200 7.7 4.8 160 8.0 6.9 116 BIG GOOSE 7990 7.1 8.4 85 9.3 7.2 129 BONE SPRINGS DIV 9350 16.5 14.1 117 13.1 12.5 105 BURGESS JUNCTION 7880 9.8 9.8 100 10.4 10.2 102 CLOUD PEAK RESERVOIR 9860 14.4 11.1 130 13.8 10.6 130 DOME LAKE 8880 10.1 10.3 98 12.4 11.0 113 GRAVE SPRINGS 8550 7.3 7.9 92 8.3 8.4 99 HANSEN SAWMILL 8360 5.6 5.6 100 8.2 6.8 121 MIDDLE POWDER 7760 9.0 9.8 92 8.5 10.4 82 POWDER RIVER PASS 9480 11.4 9.4 121 12.8 10.7 120 SUCKER CREEK 8880 11.6 9.9 117 13.5 11.4 118 TIE CREEK 6870 4.1 5.7 72 10.6 8.4 126 ----- ----- Basin wide percent of average 107 113 BELLE FOURCHE BLIND PARK 6890 7.4 8.0 92 13.2 9.9 133 COLE CANYON 5910 5.8 6.1 95 10.4 5.9 176 NORTH RAPID CREEK 6130 8.0 7.3 110 11.2 7.8 144 ----- ----- Basin wide percent of average 99 147 UPPER N. PLATTE RIVER COLUMBINE 9160 24.6 23.3 106 23.3 22.4 104 DIVIDE PEAK 8880 19.7 17.0 116 21.4 18.3 117 ELK RIVER 8700 21.1 17.3 122 19.4 17.3 112 JOE WRIGHT 10120 19.8 18.5 107 24.3 21.6 112 NORTH FRENCH CREEK 10130 29.8 24.7 121 27.8 21.7 128 OLD BATTLE 10000 28.5 28.4 100 33.7 30.6 110 SAGE CREEK BASIN 7850 10.8 9.9 109 12.4 10.6 117 SOUTH BRUSH CREEK 8440 11.8 11.2 105 13.5 14.2 95 TOWER 10500 38.3 40.2 95 35.1 34.2 103 WEBBER SPRINGS 9250 21.7 23.5 92 25.1 23.6 106 WILLOW CREEK PASS 9540 11.2 10.3 109 10.5 11.1 95 ----- ----- Basin wide percent of average 106 109 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 19.5 20.4 96 18.2 18.9 96 CASPER MTN. 7900 8.3 12.2 68 10.5 12.0 88 DEADMAN HILL 10220 14.0 13.9 101 14.4 14.4 100 DEER PARK 9700 8.7 15.3 57 13.3 19.2 69 LAPRELE CREEK 8375 7.9 9.7 81 8.8 10.8 81 RENO HILL 8400 9.2 11.5 80 10.5 12.4 85 ROACH 9700 13.7 14.9 92 15.6 16.1 97 SAND LAKE 10050 25.2 27.7 91 23.5 20.7 114 SOUTH PASS 9040 9.3 15.2 61 11.4 16.0 71 WINDY PEAK 7900 7.0 6.8 103 7.8 9.1 86 ----- ----- Basin wide percent of average 83 90 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 15.0 10.8 139 15.5 13.4 116 DIVIDE PEAK 8880 19.7 17.0 116 21.4 18.3 117 OLD BATTLE 10000 28.5 28.4 100 33.7 30.6 110 SANDSTONE RS 8150 16.0 13.7 117 17.5 16.8 104 WHISKEY PARK 8950 29.6 26.3 113 29.2 25.1 116 ----- ----- Basin wide percent of average 113 113 UPPER GREEN RIVER BIG SANDY OPENING 9080 10.7 13.0 82 10.5 12.1 87 BLIND BULL SUM 8650 22.0 25.0 88 17.5 20.1 87 EAST RIM DIVIDE 7930 8.6 11.8 73 10.9 10.9 100 ELKHART PARK G.S. 9400 11.1 12.0 92 12.1 11.7 103 GROS VENTRE SUMMIT 8750 10.1 12.5 81 12.2 11.5 106 GUNSIGHT PASS 9820 12.4 -M * 13.1 -M * KENDALL R.S. 7740 10.1 13.5 75 12.1 13.3 91 LOOMIS PARK 8240 14.6 15.7 93 16.7 15.8 106 NEW FORK LAKE 8340 10.1 10.2 99 9.3 10.2 91 SNIDER BASIN 8060 12.5 13.3 94 13.0 14.5 90 SPRING CREEK DIVIDE 9000 23.4 23.8 98 23.1 23.8 97 TRIPLE PEAK 8500 21.4 22.4 96 23.1 22.2 104 ----- ----- Basin wide percent of average 89 97 LOWER GREEN RIVER HAMS FORK 7840 9.7 11.9 82 9.8 11.0 89 HEWINTA 9519 7.0 10.0 70 10.0 12.5 80 HICKERSON PARK 9145 3.0 6.3 48 5.5 6.7 82 HOLE-IN-ROCK 9150 3.5 6.2 56 5.9 6.3 94 INDIAN CREEK 9425 20.2 24.3 83 18.3 22.5 81 KELLEY R.S. 8180 12.9 15.2 85 14.4 18.2 79 STEEL CREEK PARK 10200 9.3 13.7 68 12.4 13.9 89 ----- ----- Basin wide percent of average 75 84 UPPER BEAR RIVER BUG LAKE 7950 16.2 18.5 88 15.1 17.2 88 HAYDEN FORK 9212 14.2 14.4 99 17.1 18.3 93 KELLEY R.S. 8180 12.9 15.2 85 14.4 18.2 79 LILY LAKE 9156 11.2 11.6 97 13.2 15.2 87 MONTE CRISTO 8960 21.9 26.8 82 22.0 22.6 97 SALT RIVER SUMMIT 7760 12.3 13.0 95 13.5 16.8 80 TRIAL LAKE 9992 19.4 22.3 87 18.7 22.1 85 ----- ----- Basin wide percent of average 89 87 ----------------------------------------------------------------------------- -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.