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: DECEMBER 20 , 2007 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 5.6 6.5 86 11.9 8.7 137 COTTONWOOD CREEK 7670 4.9 7.6 64 8.3 11.1 75 GRAND TARGHEE 9260 17.7 -M * 14.5 -M * GRANITE CREEK 6770 3.4 5.8 59 9.2 7.8 118 GRASSY LAKE 7265 9.3 11.7 79 16.8 14.0 120 GROS VENTRE SUMMIT 8750 5.6 5.7 98 7.0 5.5 127 GUNSIGHT PASS 9820 3.5 -M * 6.6 -M * LEWIS LAKE DIVIDE 7850 10.7 11.7 91 16.9 14.4 117 PHILLIPS BENCH 8200 7.7 10.1 76 12.1 10.9 111 SALT RIVER SUMMIT 7760 1.5 4.2 36 4.0 7.3 55 SNAKE RIVER STATION 6920 4.4 6.3 70 12.1 9.2 132 SPRING CREEK DIVIDE 9000 5.2 10.3 50 6.6 10.6 62 THUMB DIVIDE 7980 4.9 6.1 80 8.8 7.5 117 TOGWOTEE PASS 9580 11.1 9.7 114 12.7 10.1 126 TWO OCEAN PLATEAU 9240 15.6 11.3 138 14.8 11.4 130 WILLOW CREEK 8380 6.3 11.6 54 12.0 13.0 92 ----- ----- Basin wide percent of average 81 108 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 11.5 9.6 120 10.9 8.4 130 BLACK BEAR 8170 15.8 14.1 112 17.9 14.6 123 CANYON 7870 5.7 4.9 116 8.9 6.5 137 FISHER CREEK 9100 18.0 13.4 134 16.8 14.1 119 MADISON PLATEAU 7750 9.4 9.1 103 13.5 10.4 130 NORTHEAST ENTRANCE 7350 2.2 3.9 56 6.2 5.5 113 PARKER PEAK 9400 10.9 8.9 122 11.1 7.2 154 SYLVAN LAKE 8420 7.8 8.8 89 12.1 9.6 126 THUMB DIVIDE 7980 4.9 6.1 80 8.8 7.5 117 TWO OCEAN PLATEAU 9240 15.6 11.3 138 14.8 11.4 130 WHISKEY CREEK 6800 5.5 6.0 92 10.8 8.3 130 WHITE MILL 8700 11.4 9.4 121 11.7 10.8 108 WOLVERINE 7650 3.2 4.5 71 6.9 6.1 113 ----- ----- Basin wide percent of average 111 125 WIND RIVER BURROUGHS CREEK 8750 7.1 5.5 129 9.9 6.7 148 COLD SPRINGS 9630 1.3 4.0 32 4.1 5.1 80 DEER PARK 9700 2.6 5.8 45 6.1 9.3 66 HOBBS PARK 10100 3.2 6.8 47 5.2 5.7 91 LITTLE WARM 9370 3.5 4.5 78 6.1 5.8 105 SOUTH PASS 9040 2.3 7.0 33 5.2 8.0 65 ST. LAWRENCE ALT 8620 1.5 3.4 44 3.1 4.2 74 TOGWOTEE PASS 9580 11.1 9.7 114 12.7 10.1 126 TOWNSEND CREEK 8700 1.5 3.8 39 4.5 5.4 83 ----- ----- Basin wide percent of average 68 94 BIGHORN BASIN BALD MTN. 9380 5.1 8.1 63 6.4 7.1 90 BEAR TRAP MEADOW 8200 2.4 2.2 109 3.8 4.1 93 BLACKWATER 9780 11.2 10.4 108 10.7 9.5 113 BONE SPRINGS DIV 9350 4.8 6.7 72 5.7 6.3 90 EVENING STAR 9200 12.4 11.6 107 14.6 11.0 133 GRAVE SPRINGS 8550 2.6 3.3 79 4.3 4.3 100 KIRWIN 9550 6.1 5.2 117 7.4 5.2 142 MARQUETTE 8760 .6 4.4 14 5.0 4.8 104 MIDDLE POWDER 7760 2.7 4.8 56 3.9 6.0 65 OWL CREEK 8975 2.2 2.4 92 3.9 2.6 150 POWDER RIVER PASS 9480 3.4 4.4 77 5.4 5.2 104 SHELL CREEK 9580 6.6 6.4 103 7.2 5.8 124 SYLVAN LAKE 8420 7.8 8.8 89 12.1 9.6 126 SYLVAN ROAD 7120 3.8 5.1 75 11.3 8.9 127 TIMBER CREEK 7950 .8 2.8 29 4.7 3.4 138 YOUNTS PEAK 8350 7.0 6.5 108 9.6 6.9 139 ----- ----- Basin wide percent of average 85 115 SHOSHONE RIVER BLACKWATER 9780 11.2 10.4 108 10.7 9.5 113 EVENING STAR 9200 12.4 11.6 107 14.6 11.0 133 KIRWIN 9550 6.1 5.2 117 7.4 5.2 142 MARQUETTE 8760 .6 4.4 14 5.0 4.8 104 SYLVAN LAKE 8420 7.8 8.8 89 12.1 9.6 126 SYLVAN ROAD 7120 3.8 5.1 75 11.3 8.9 127 YOUNTS PEAK 8350 7.0 6.5 108 9.6 6.9 139 ----- ----- Basin wide percent of average 94 126 POWDER-TONGUE BEAR TRAP MEADOW 8200 2.4 2.2 109 3.8 4.1 93 BIG GOOSE 7990 2.9 3.6 81 5.9 4.0 148 BONE SPRINGS DIV 9350 4.8 6.7 72 5.7 6.3 90 BURGESS JUNCTION 7880 3.1 4.7 66 5.6 5.3 106 CLOUD PEAK RESERVOIR 9860 5.0 4.9 102 7.2 5.8 124 DOME LAKE 8880 3.6 5.2 69 7.0 6.1 115 GRAVE SPRINGS 8550 2.6 3.3 79 4.3 4.3 100 HANSEN SAWMILL 8360 2.8 2.7 104 5.0 3.8 132 MIDDLE POWDER 7760 2.7 4.8 56 3.9 6.0 65 POWDER RIVER PASS 9480 3.4 4.4 77 5.4 5.2 104 SUCKER CREEK 8880 3.6 4.3 84 5.7 5.8 98 TIE CREEK 6870 .5 1.8 28 4.3 4.5 96 ----- ----- Basin wide percent of average 77 104 BELLE FOURCHE BLIND PARK 6890 1.2 2.6 46 3.3 5.5 60 COLE CANYON 5910 .7 2.8 25 2.4 3.5 69 NORTH RAPID CREEK 6130 1.9 2.6 73 2.7 4.7 57 ----- ----- Basin wide percent of average 48 61 UPPER N. PLATTE RIVER COLUMBINE 9160 4.7 7.7 61 8.4 9.3 90 DIVIDE PEAK 8880 7.1 7.4 96 8.1 8.4 96 ELK RIVER 8700 4.9 5.3 92 8.0 7.3 110 JOE WRIGHT 10120 8.1 8.2 99 10.2 10.1 101 NORTH FRENCH CREEK 10130 9.5 11.0 86 10.6 10.1 105 OLD BATTLE 10000 9.8 12.5 78 12.6 13.2 95 SAGE CREEK BASIN 7850 4.5 4.3 105 6.4 4.9 131 SOUTH BRUSH CREEK 8440 4.2 4.2 100 7.6 6.7 113 TOWER 10500 9.6 17.3 55 13.0 14.9 87 WEBBER SPRINGS 9250 7.1 9.5 75 9.9 10.9 91 WILLOW CREEK PASS 9540 6.1 4.8 127 7.2 5.6 129 ----- ----- Basin wide percent of average 82 101 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 6.8 8.7 78 8.1 8.5 95 CASPER MTN. 7900 2.1 6.0 35 5.7 6.5 88 DEADMAN HILL 10220 6.6 6.5 102 6.6 6.8 97 DEER PARK 9700 2.6 5.8 45 6.1 9.3 66 LAPRELE CREEK 8375 1.0 4.5 22 3.8 5.3 72 RENO HILL 8400 3.5 5.7 61 5.5 6.3 87 ROACH 9700 6.4 6.0 107 8.4 7.1 118 SAND LAKE 10050 9.6 12.6 76 10.2 9.8 104 SOUTH PASS 9040 2.3 7.0 33 5.2 8.0 65 WINDY PEAK 7900 1.9 3.1 61 3.7 4.8 77 ----- ----- Basin wide percent of average 65 87 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 3.0 2.9 103 5.9 5.9 100 DIVIDE PEAK 8880 7.1 7.4 96 8.1 8.4 96 OLD BATTLE 10000 9.8 12.5 78 12.6 13.2 95 SANDSTONE RS 8150 4.3 3.9 110 7.1 7.4 96 WHISKEY PARK 8950 7.0 8.8 80 10.9 11.0 99 ----- ----- Basin wide percent of average 88 97 UPPER GREEN RIVER BIG SANDY OPENING 9080 3.1 5.8 53 4.0 5.6 71 BLIND BULL SUM 8650 6.6 10.7 62 6.7 9.2 73 EAST RIM DIVIDE 7930 1.4 4.8 29 4.1 4.8 85 ELKHART PARK G.S. 9400 3.2 5.2 62 4.8 5.7 84 GROS VENTRE SUMMIT 8750 5.6 5.7 98 7.0 5.5 127 GUNSIGHT PASS 9820 3.5 -M * 6.6 -M * KENDALL R.S. 7740 2.8 5.2 54 5.3 5.6 95 LOOMIS PARK 8240 3.9 6.6 59 5.6 6.9 81 NEW FORK LAKE 8340 2.4 4.3 56 4.2 5.0 84 SNIDER BASIN 8060 2.0 5.6 36 3.9 6.5 60 SPRING CREEK DIVIDE 9000 5.2 10.3 50 6.6 10.6 62 TRIPLE PEAK 8500 5.9 9.6 61 8.8 9.2 96 ----- ----- Basin wide percent of average 57 82 LOWER GREEN RIVER HAMS FORK 7840 1.2 4.2 29 3.0 4.8 62 HEWINTA 9519 1.2 3.2 37 6.0 6.2 97 HICKERSON PARK 9145 1.1 2.3 48 3.7 3.8 97 HOLE-IN-ROCK 9150 .9 2.1 43 4.2 3.5 120 INDIAN CREEK 9425 4.6 10.1 46 5.4 10.0 54 KELLEY R.S. 8180 2.6 6.3 41 5.1 8.2 62 STEEL CREEK PARK 10200 2.1 5.6 38 6.6 6.6 100 ----- ----- Basin wide percent of average 41 79 UPPER BEAR RIVER BUG LAKE 7950 -M 6.4 * 3.8 7.8 49 HAYDEN FORK 9212 3.0 4.9 61 6.2 8.4 74 KELLEY R.S. 8180 2.6 6.3 41 5.1 8.2 62 LILY LAKE 9156 1.7 4.4 39 5.8 7.5 77 MONTE CRISTO 8960 4.5 8.4 54 6.7 10.2 66 SALT RIVER SUMMIT 7760 1.5 4.2 36 4.0 7.3 55 TRIAL LAKE 9992 4.5 8.4 54 6.2 9.3 67 ----- ----- Basin wide percent of average 49 64 ----------------------------------------------------------------------------- -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.