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 MONDAY: DECEMBER 31 , 2007 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 7.4 7.9 94 13.8 10.1 137 COTTONWOOD CREEK 7670 7.7 9.4 82 10.9 13.1 83 GRAND TARGHEE 9260 21.4 -M * 16.4 -M * GRANITE CREEK 6770 5.4 7.3 74 11.1 9.3 119 GRASSY LAKE 7265 12.1 14.2 85 20.0 16.8 119 GROS VENTRE SUMMIT 8750 6.6 6.7 99 7.8 6.2 126 GUNSIGHT PASS 9820 4.1 -M * 7.5 -M * LEWIS LAKE DIVIDE 7850 13.7 14.3 96 19.6 17.0 115 PHILLIPS BENCH 8200 10.3 12.2 84 14.7 13.1 112 SALT RIVER SUMMIT 7760 3.4 5.2 65 5.7 8.7 66 SNAKE RIVER STATION 6920 6.0 7.6 79 14.0 10.7 131 SPRING CREEK DIVIDE 9000 7.7 12.2 63 8.7 12.6 69 THUMB DIVIDE 7980 6.1 7.4 82 9.8 8.8 111 TOGWOTEE PASS 9580 13.2 11.3 117 14.9 11.7 127 TWO OCEAN PLATEAU 9240 18.3 13.1 140 16.7 13.1 127 WILLOW CREEK 8380 10.2 13.9 73 15.9 15.1 105 ----- ----- Basin wide percent of average 90 110 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 12.9 11.2 115 12.4 9.8 127 BLACK BEAR 8170 19.6 16.8 117 21.1 17.1 123 CANYON 7870 7.2 5.9 122 10.4 7.6 137 FISHER CREEK 9100 21.1 15.9 133 18.7 16.6 113 MADISON PLATEAU 7750 11.6 10.9 106 15.5 12.1 128 NORTHEAST ENTRANCE 7350 2.8 4.8 58 7.0 6.2 113 PARKER PEAK 9400 12.7 10.3 123 -M 8.0 * SYLVAN LAKE 8420 9.4 10.2 92 14.0 10.8 130 THUMB DIVIDE 7980 6.1 7.4 82 9.8 8.8 111 TWO OCEAN PLATEAU 9240 18.3 13.1 140 16.7 13.1 127 WHISKEY CREEK 6800 6.9 7.3 95 12.6 9.6 131 WHITE MILL 8700 13.0 10.9 119 -M 12.5 * WOLVERINE 7650 4.1 5.6 73 7.6 6.9 110 ----- ----- Basin wide percent of average 112 123 WIND RIVER BURROUGHS CREEK 8750 8.3 6.6 126 11.0 7.8 141 COLD SPRINGS 9630 2.2 4.6 48 5.0 5.6 89 DEER PARK 9700 5.4 6.7 81 8.8 10.7 82 HOBBS PARK 10100 5.0 7.6 66 6.5 6.3 103 LITTLE WARM 9370 4.2 5.2 81 6.9 6.6 105 SOUTH PASS 9040 4.7 8.1 58 7.7 9.0 86 ST. LAWRENCE ALT 8620 2.4 3.7 65 4.1 4.5 91 TOGWOTEE PASS 9580 13.2 11.3 117 14.9 11.7 127 TOWNSEND CREEK 8700 2.8 4.3 65 5.8 5.9 98 ----- ----- Basin wide percent of average 83 104 BIGHORN BASIN BALD MTN. 9380 6.6 9.5 69 7.2 8.3 87 BEAR TRAP MEADOW 8200 4.0 2.5 160 5.3 4.4 120 BLACKWATER 9780 12.4 11.8 105 11.9 10.6 112 BONE SPRINGS DIV 9350 6.7 7.7 87 -M 7.1 * EVENING STAR 9200 14.0 13.4 104 -M 12.7 * GRAVE SPRINGS 8550 3.6 3.9 92 5.2 4.8 108 KIRWIN 9550 6.8 5.8 117 8.0 5.8 138 MARQUETTE 8760 1.5 4.9 31 5.5 5.2 106 MIDDLE POWDER 7760 4.2 5.4 78 5.0 6.7 75 OWL CREEK 8975 2.6 2.6 100 4.4 2.9 152 POWDER RIVER PASS 9480 4.9 5.1 96 6.9 5.9 117 SHELL CREEK 9580 7.6 7.2 106 8.0 6.6 121 SYLVAN LAKE 8420 9.4 10.2 92 14.0 10.8 130 SYLVAN ROAD 7120 4.5 6.0 75 12.4 9.9 125 TIMBER CREEK 7950 1.6 3.0 53 5.4 3.7 146 YOUNTS PEAK 8350 7.9 7.7 103 10.3 8.0 129 ----- ----- Basin wide percent of average 92 117 SHOSHONE RIVER BLACKWATER 9780 12.4 11.8 105 11.9 10.6 112 EVENING STAR 9200 14.0 13.4 104 -M 12.7 * KIRWIN 9550 6.8 5.8 117 8.0 5.8 138 MARQUETTE 8760 1.5 4.9 31 5.5 5.2 106 SYLVAN LAKE 8420 9.4 10.2 92 14.0 10.8 130 SYLVAN ROAD 7120 4.5 6.0 75 12.4 9.9 125 YOUNTS PEAK 8350 7.9 7.7 103 10.3 8.0 129 ----- ----- Basin wide percent of average 94 123 POWDER-TONGUE BEAR TRAP MEADOW 8200 4.0 2.5 160 5.3 4.4 120 BIG GOOSE 7990 4.0 4.3 93 6.8 4.4 155 BONE SPRINGS DIV 9350 6.7 7.7 87 -M 7.1 * BURGESS JUNCTION 7880 4.5 5.4 83 6.6 6.0 110 CLOUD PEAK RESERVOIR 9860 6.2 5.6 111 7.7 6.3 122 DOME LAKE 8880 4.6 5.9 78 8.0 6.8 118 GRAVE SPRINGS 8550 3.6 3.9 92 5.2 4.8 108 HANSEN SAWMILL 8360 3.1 3.2 97 5.2 4.2 124 MIDDLE POWDER 7760 4.2 5.4 78 5.0 6.7 75 POWDER RIVER PASS 9480 4.9 5.1 96 6.9 5.9 117 SUCKER CREEK 8880 4.9 5.1 96 6.7 6.6 102 TIE CREEK 6870 2.0 2.5 80 5.9 5.0 118 ----- ----- Basin wide percent of average 93 113 BELLE FOURCHE BLIND PARK 6890 2.0 3.5 57 4.0 6.1 66 COLE CANYON 5910 1.6 3.2 50 3.1 3.8 82 NORTH RAPID CREEK 6130 2.8 3.2 87 3.2 5.2 62 ----- ----- Basin wide percent of average 65 68 UPPER N. PLATTE RIVER COLUMBINE 9160 7.8 9.6 81 11.0 11.2 98 DIVIDE PEAK 8880 10.3 8.9 116 10.8 9.8 110 ELK RIVER 8700 7.9 6.9 114 10.1 8.6 117 JOE WRIGHT 10120 9.4 9.4 100 11.9 11.7 102 NORTH FRENCH CREEK 10130 12.6 13.0 97 13.5 11.7 115 OLD BATTLE 10000 13.6 14.3 95 16.2 15.5 105 SAGE CREEK BASIN 7850 7.6 5.2 146 8.9 5.7 156 SOUTH BRUSH CREEK 8440 5.8 5.0 116 9.1 7.6 120 TOWER 10500 14.3 20.1 71 16.5 17.4 95 WEBBER SPRINGS 9250 10.3 11.2 92 13.1 12.7 103 WILLOW CREEK PASS 9540 7.0 5.5 127 8.1 6.3 129 ----- ----- Basin wide percent of average 98 109 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 8.9 10.4 86 10.1 9.9 102 CASPER MTN. 7900 4.9 6.8 72 7.5 7.1 106 DEADMAN HILL 10220 7.8 7.4 105 7.9 7.7 103 DEER PARK 9700 5.4 6.7 81 8.8 10.7 82 LAPRELE CREEK 8375 2.2 5.2 42 5.0 6.0 83 RENO HILL 8400 5.6 6.4 87 7.2 7.0 103 ROACH 9700 8.7 7.1 123 10.6 8.3 128 SAND LAKE 10050 12.0 14.6 82 12.3 11.3 109 SOUTH PASS 9040 4.7 8.1 58 7.7 9.0 86 WINDY PEAK 7900 3.1 3.4 91 4.7 5.4 87 ----- ----- Basin wide percent of average 83 99 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 5.6 3.9 144 8.2 6.9 119 DIVIDE PEAK 8880 10.3 8.9 116 10.8 9.8 110 OLD BATTLE 10000 13.6 14.3 95 16.2 15.5 105 SANDSTONE RS 8150 6.4 5.0 128 9.9 8.7 114 WHISKEY PARK 8950 10.6 10.7 99 14.7 12.8 115 ----- ----- Basin wide percent of average 109 111 UPPER GREEN RIVER BIG SANDY OPENING 9080 4.8 6.7 72 5.5 6.4 86 BLIND BULL SUM 8650 9.0 12.8 70 8.3 10.8 77 EAST RIM DIVIDE 7930 2.4 5.7 42 5.0 5.6 89 ELKHART PARK G.S. 9400 4.4 6.1 72 5.5 6.5 85 GROS VENTRE SUMMIT 8750 6.6 6.7 99 7.8 6.2 126 GUNSIGHT PASS 9820 4.1 -M * 7.5 -M * KENDALL R.S. 7740 4.0 6.4 62 6.3 6.6 95 LOOMIS PARK 8240 5.7 7.8 73 7.4 8.1 91 NEW FORK LAKE 8340 3.4 5.2 65 4.3 5.8 74 SNIDER BASIN 8060 3.4 6.7 51 5.0 7.7 65 SPRING CREEK DIVIDE 9000 7.7 12.2 63 8.7 12.6 69 TRIPLE PEAK 8500 8.3 11.5 72 11.3 10.9 104 ----- ----- Basin wide percent of average 68 86 LOWER GREEN RIVER HAMS FORK 7840 2.9 5.3 55 3.9 5.6 70 HEWINTA 9519 2.7 4.0 68 7.6 6.9 110 HICKERSON PARK 9145 1.7 2.8 61 4.4 4.1 107 HOLE-IN-ROCK 9150 1.5 2.6 58 4.8 3.8 126 INDIAN CREEK 9425 7.8 12.1 64 7.9 11.8 67 KELLEY R.S. 8180 4.8 7.4 65 7.3 9.8 74 STEEL CREEK PARK 10200 4.0 6.5 62 8.4 7.4 114 ----- ----- Basin wide percent of average 62 90 UPPER BEAR RIVER BUG LAKE 7950 4.5 8.0 56 6.0 8.9 67 HAYDEN FORK 9212 4.9 6.1 80 8.3 9.7 86 KELLEY R.S. 8180 4.8 7.4 65 7.3 9.8 74 LILY LAKE 9156 3.4 5.3 64 7.1 8.5 84 MONTE CRISTO 8960 8.2 10.6 77 9.6 11.8 81 SALT RIVER SUMMIT 7760 3.4 5.2 65 5.7 8.7 66 TRIAL LAKE 9992 6.4 10.2 63 8.4 10.9 77 ----- ----- Basin wide percent of average 67 77 ----------------------------------------------------------------------------- -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.