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: DECEMBER 31 , 2008 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 6.1 8.1 75 8.8 10.3 85 COTTONWOOD CREEK 7670 10.6 9.5 112 13.8 13.3 104 GRAND TARGHEE 9260 17.8 -M * 16.6 -M * GRANITE CREEK 6770 -M 7.5 * -M 9.4 * GRASSY LAKE 7265 12.7 14.5 88 16.4 17.1 96 GROS VENTRE SUMMIT 8750 6.9 6.8 101 7.8 6.3 124 GUNSIGHT PASS 9820 6.2 -M * 7.4 -M * LEWIS LAKE DIVIDE 7850 11.7 14.5 81 15.6 17.3 90 PHILLIPS BENCH 8200 11.9 12.4 96 14.4 13.3 108 SALT RIVER SUMMIT 7760 4.9 5.3 92 6.7 8.8 76 SNAKE RIVER STATION 6920 5.8 7.7 75 9.8 10.9 90 SPRING CREEK DIVIDE 9000 9.8 12.3 80 11.2 12.8 87 THUMB DIVIDE 7980 7.5 7.5 100 9.7 9.0 108 TOGWOTEE PASS 9580 12.4 11.5 108 13.8 11.9 116 TWO OCEAN PLATEAU 9240 14.7 13.3 111 11.7 13.3 88 WILLOW CREEK 8380 12.7 14.1 90 17.3 15.3 113 ----- ----- Basin wide percent of average 93 98 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 9.0 11.3 80 8.2 9.9 83 BLACK BEAR 8170 15.4 17.0 91 17.5 17.4 101 CANYON 7870 5.4 6.0 90 6.2 7.7 81 FISHER CREEK 9100 15.2 16.0 95 14.7 16.9 87 MADISON PLATEAU 7750 9.3 11.0 85 11.3 12.2 93 NORTHEAST ENTRANCE 7350 3.3 4.9 67 6.2 6.3 98 PARKER PEAK 9400 11.0 10.4 106 8.0 8.1 99 SYLVAN LAKE 8420 7.8 10.3 76 10.1 10.9 93 THUMB DIVIDE 7980 7.5 7.5 100 9.7 9.0 108 TWO OCEAN PLATEAU 9240 14.7 13.3 111 11.7 13.3 88 WHISKEY CREEK 6800 6.5 7.4 88 9.5 9.8 97 WHITE MILL 8700 9.6 11.0 87 10.0 12.6 79 WOLVERINE 7650 4.2 5.7 74 5.3 6.9 77 ----- ----- Basin wide percent of average 90 91 WIND RIVER BURROUGHS CREEK 8750 7.2 6.7 107 7.9 7.9 100 COLD SPRINGS 9630 3.7 4.6 80 5.4 5.7 95 DEER PARK 9700 6.5 6.7 97 8.9 10.8 82 HOBBS PARK 10100 6.1 7.6 80 6.2 6.3 98 LITTLE WARM 9370 5.0 5.3 94 6.7 6.6 102 SOUTH PASS 9040 6.2 8.1 77 8.2 9.1 90 ST. LAWRENCE ALT 8620 1.7 3.7 46 4.3 4.6 93 TOGWOTEE PASS 9580 12.4 11.5 108 13.8 11.9 116 TOWNSEND CREEK 8700 3.6 4.4 82 5.7 6.0 95 ----- ----- Basin wide percent of average 89 97 BIGHORN BASIN BALD MTN. 9380 10.2 9.6 106 9.1 8.4 108 BEAR TRAP MEADOW 8200 3.7 2.6 142 5.0 4.5 111 BLACKWATER 9780 10.2 11.9 86 9.5 10.7 89 BONE SPRINGS DIV 9350 9.6 7.7 125 8.0 7.2 111 EVENING STAR 9200 11.3 13.5 84 12.6 12.8 98 GRAVE SPRINGS 8550 2.9 4.0 72 4.7 4.8 98 KIRWIN 9550 6.1 5.9 103 6.6 5.8 114 MARQUETTE 8760 2.1 4.9 43 4.8 5.3 91 MIDDLE POWDER 7760 4.0 5.5 73 5.0 6.8 74 OWL CREEK 8975 3.1 2.7 115 3.1 2.9 107 POWDER RIVER PASS 9480 6.2 5.2 119 7.1 5.9 120 SHELL CREEK 9580 8.6 7.3 118 8.6 6.6 130 SYLVAN LAKE 8420 7.8 10.3 76 10.1 10.9 93 SYLVAN ROAD 7120 5.1 6.1 84 7.7 10.0 77 TIMBER CREEK 7950 2.2 3.0 73 4.9 3.7 132 YOUNTS PEAK 8350 8.3 7.8 106 7.9 8.1 98 ----- ----- Basin wide percent of average 94 100 SHOSHONE RIVER BLACKWATER 9780 10.2 11.9 86 9.5 10.7 89 EVENING STAR 9200 11.3 13.5 84 12.6 12.8 98 KIRWIN 9550 6.1 5.9 103 6.6 5.8 114 MARQUETTE 8760 2.1 4.9 43 4.8 5.3 91 SYLVAN LAKE 8420 7.8 10.3 76 10.1 10.9 93 SYLVAN ROAD 7120 5.1 6.1 84 7.7 10.0 77 YOUNTS PEAK 8350 8.3 7.8 106 7.9 8.1 98 ----- ----- Basin wide percent of average 84 93 POWDER-TONGUE BEAR TRAP MEADOW 8200 3.7 2.6 142 5.0 4.5 111 BIG GOOSE 7990 3.9 4.3 91 6.1 4.5 136 BONE SPRINGS DIV 9350 9.6 7.7 125 8.0 7.2 111 BURGESS JUNCTION 7880 5.8 5.4 107 6.8 6.0 113 CLOUD PEAK RESERVOIR 9860 7.7 5.7 135 8.3 6.3 132 DOME LAKE 8880 6.1 6.0 102 7.8 6.8 115 GRAVE SPRINGS 8550 2.9 4.0 72 4.7 4.8 98 HANSEN SAWMILL 8360 2.7 3.2 84 5.3 4.3 123 MIDDLE POWDER 7760 4.0 5.5 73 5.0 6.8 74 POWDER RIVER PASS 9480 6.2 5.2 119 7.1 5.9 120 SUCKER CREEK 8880 7.3 5.2 140 8.9 6.6 135 TIE CREEK 6870 1.6 2.5 64 7.6 5.1 149 ----- ----- Basin wide percent of average 107 117 BELLE FOURCHE BLIND PARK 6890 4.5 3.5 129 8.5 6.1 139 COLE CANYON 5910 3.2 3.2 100 7.2 3.9 185 NORTH RAPID CREEK 6130 4.8 3.2 150 7.9 5.3 149 ----- ----- Basin wide percent of average 126 154 UPPER N. PLATTE RIVER COLUMBINE 9160 8.4 9.8 86 8.8 11.3 78 DIVIDE PEAK 8880 7.9 9.1 87 10.1 9.9 102 ELK RIVER 8700 8.4 7.1 118 9.4 8.8 107 JOE WRIGHT 10120 10.9 9.6 114 13.4 11.8 114 NORTH FRENCH CREEK 10130 12.3 13.2 93 12.2 11.9 103 OLD BATTLE 10000 12.7 14.5 88 16.0 15.8 101 SAGE CREEK BASIN 7850 4.0 5.3 75 5.9 5.8 102 SOUTH BRUSH CREEK 8440 6.0 5.1 118 7.7 7.7 100 TOWER 10500 13.6 20.4 67 16.4 17.7 93 WEBBER SPRINGS 9250 9.9 11.3 88 12.5 12.9 97 WILLOW CREEK PASS 9540 5.9 5.5 107 6.6 6.4 103 ----- ----- Basin wide percent of average 90 99 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 8.1 10.6 76 8.2 10.0 82 CASPER MTN. 7900 3.3 6.9 48 6.1 7.2 85 DEADMAN HILL 10220 6.8 7.5 91 7.3 7.8 94 DEER PARK 9700 6.5 6.7 97 8.9 10.8 82 LAPRELE CREEK 8375 -M 5.3 * -M 6.1 * RENO HILL 8400 4.0 6.5 62 5.3 7.1 75 ROACH 9700 6.9 7.2 96 8.2 8.4 98 SAND LAKE 10050 11.1 14.7 76 10.2 11.4 89 SOUTH PASS 9040 6.2 8.1 77 8.2 9.1 90 WINDY PEAK 7900 2.3 3.5 66 3.1 5.5 56 ----- ----- Basin wide percent of average 77 85 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 4.3 4.0 108 7.1 7.0 101 DIVIDE PEAK 8880 7.9 9.1 87 10.1 9.9 102 OLD BATTLE 10000 12.7 14.5 88 16.0 15.8 101 SANDSTONE RS 8150 5.8 5.1 114 8.2 8.8 93 WHISKEY PARK 8950 10.3 10.9 94 12.7 13.0 98 ----- ----- Basin wide percent of average 94 99 UPPER GREEN RIVER BIG SANDY OPENING 9080 5.5 6.8 81 5.9 6.5 91 BLIND BULL SUM 8650 9.7 13.0 75 9.5 10.9 87 EAST RIM DIVIDE 7930 3.5 5.8 60 6.5 5.7 114 ELKHART PARK G.S. 9400 6.3 6.2 102 7.8 6.6 118 GROS VENTRE SUMMIT 8750 6.9 6.8 101 7.8 6.3 124 GUNSIGHT PASS 9820 6.2 -M * 7.4 -M * KENDALL R.S. 7740 4.7 6.6 71 7.1 6.8 104 LOOMIS PARK 8240 7.0 7.9 89 9.3 8.2 113 NEW FORK LAKE 8340 5.8 5.3 109 5.7 5.8 98 SNIDER BASIN 8060 5.3 6.8 78 6.5 7.8 83 SPRING CREEK DIVIDE 9000 9.8 12.3 80 11.2 12.8 87 TRIPLE PEAK 8500 10.1 11.7 86 11.6 11.0 105 ----- ----- Basin wide percent of average 84 101 LOWER GREEN RIVER HAMS FORK 7840 3.1 5.4 57 5.0 5.7 88 HEWINTA 9519 2.3 4.0 57 5.3 6.9 77 HICKERSON PARK 9145 .8 2.8 29 3.4 4.2 81 HOLE-IN-ROCK 9150 1.5 2.6 58 3.7 3.8 97 INDIAN CREEK 9425 9.2 12.3 75 9.6 12.0 80 KELLEY R.S. 8180 6.0 7.5 80 7.6 9.9 77 STEEL CREEK PARK 10200 3.8 6.6 58 6.9 7.5 92 ----- ----- Basin wide percent of average 65 83 UPPER BEAR RIVER BUG LAKE 7950 4.2 8.1 52 7.1 9.1 78 HAYDEN FORK 9212 6.7 6.2 108 9.2 9.9 93 KELLEY R.S. 8180 6.0 7.5 80 7.6 9.9 77 LILY LAKE 9156 5.3 5.4 98 7.1 8.6 83 MONTE CRISTO 8960 9.9 10.8 92 11.1 11.9 93 SALT RIVER SUMMIT 7760 4.9 5.3 92 6.7 8.8 76 TRIAL LAKE 9992 9.3 10.3 90 9.7 11.1 87 ----- ----- Basin wide percent of average 86 84 ----------------------------------------------------------------------------- -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.