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 FRIDAY: DECEMBER 21 , 2007 ----------------------------------------------------------------------------- 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 6.6 92 12.4 8.8 141 COTTONWOOD CREEK 7670 5.6 7.8 72 8.9 11.3 79 GRAND TARGHEE 9260 18.4 -M * 14.8 -M * GRANITE CREEK 6770 4.0 5.9 68 9.8 8.0 123 GRASSY LAKE 7265 10.2 11.9 86 17.6 14.3 123 GROS VENTRE SUMMIT 8750 5.9 5.8 102 7.1 5.6 127 GUNSIGHT PASS 9820 3.7 -M * 6.9 -M * LEWIS LAKE DIVIDE 7850 11.8 12.0 98 17.7 14.6 121 PHILLIPS BENCH 8200 8.3 10.3 81 12.7 11.1 114 SALT RIVER SUMMIT 7760 2.2 4.3 51 4.7 7.4 64 SNAKE RIVER STATION 6920 5.0 6.4 78 12.7 9.3 137 SPRING CREEK DIVIDE 9000 6.0 10.5 57 7.2 10.8 67 THUMB DIVIDE 7980 5.4 6.2 87 9.3 7.6 122 TOGWOTEE PASS 9580 11.7 9.8 119 13.3 10.2 130 TWO OCEAN PLATEAU 9240 16.4 11.5 143 15.5 11.6 134 WILLOW CREEK 8380 7.3 11.8 62 13.1 13.2 99 ----- ----- Basin wide percent of average 88 113 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 11.9 9.7 123 11.4 8.5 134 BLACK BEAR 8170 17.3 14.3 121 19.2 14.8 130 CANYON 7870 6.2 4.9 127 9.4 6.6 142 FISHER CREEK 9100 18.8 13.6 138 17.5 14.3 122 MADISON PLATEAU 7750 10.3 9.2 112 14.4 10.6 136 NORTHEAST ENTRANCE 7350 2.3 4.0 57 6.4 5.5 116 PARKER PEAK 9400 11.4 9.0 127 11.4 7.2 158 SYLVAN LAKE 8420 8.1 9.0 90 12.5 9.7 129 THUMB DIVIDE 7980 5.4 6.2 87 9.3 7.6 122 TWO OCEAN PLATEAU 9240 16.4 11.5 143 15.5 11.6 134 WHISKEY CREEK 6800 6.1 6.0 102 11.5 8.4 137 WHITE MILL 8700 11.8 9.5 124 11.9 11.0 108 WOLVERINE 7650 3.4 4.6 74 6.9 6.1 113 ----- ----- Basin wide percent of average 116 129 WIND RIVER BURROUGHS CREEK 8750 7.5 5.6 134 10.2 6.8 150 COLD SPRINGS 9630 1.6 4.1 39 4.4 5.2 85 DEER PARK 9700 4.1 5.9 69 7.6 9.4 81 HOBBS PARK 10100 3.8 6.8 56 5.6 5.7 98 LITTLE WARM 9370 3.7 4.5 82 6.3 5.9 107 SOUTH PASS 9040 3.5 7.0 50 6.4 8.1 79 ST. LAWRENCE ALT 8620 1.9 3.4 56 3.4 4.2 81 TOGWOTEE PASS 9580 11.7 9.8 119 13.3 10.2 130 TOWNSEND CREEK 8700 2.0 3.8 53 4.8 5.5 87 ----- ----- Basin wide percent of average 78 102 BIGHORN BASIN BALD MTN. 9380 5.2 8.3 63 6.5 7.2 90 BEAR TRAP MEADOW 8200 2.5 2.2 114 3.9 4.1 95 BLACKWATER 9780 11.4 10.5 109 10.9 9.6 114 BONE SPRINGS DIV 9350 4.9 6.8 72 5.6 6.3 89 EVENING STAR 9200 12.7 11.8 108 14.2 11.2 127 GRAVE SPRINGS 8550 2.8 3.4 82 4.4 4.3 102 KIRWIN 9550 6.3 5.3 119 7.4 5.2 142 MARQUETTE 8760 .5 4.4 11 4.7 4.9 96 MIDDLE POWDER 7760 2.8 4.9 57 3.9 6.1 64 OWL CREEK 8975 2.2 2.4 92 3.9 2.6 150 POWDER RIVER PASS 9480 3.5 4.5 78 5.6 5.3 106 SHELL CREEK 9580 6.7 6.4 105 7.3 5.8 126 SYLVAN LAKE 8420 8.1 9.0 90 12.5 9.7 129 SYLVAN ROAD 7120 4.0 5.2 77 11.6 9.0 129 TIMBER CREEK 7950 .9 2.8 32 4.5 3.5 129 YOUNTS PEAK 8350 7.3 6.6 111 9.8 7.0 140 ----- ----- Basin wide percent of average 87 115 SHOSHONE RIVER BLACKWATER 9780 11.4 10.5 109 10.9 9.6 114 EVENING STAR 9200 12.7 11.8 108 14.2 11.2 127 KIRWIN 9550 6.3 5.3 119 7.4 5.2 142 MARQUETTE 8760 .5 4.4 11 4.7 4.9 96 SYLVAN LAKE 8420 8.1 9.0 90 12.5 9.7 129 SYLVAN ROAD 7120 4.0 5.2 77 11.6 9.0 129 YOUNTS PEAK 8350 7.3 6.6 111 9.8 7.0 140 ----- ----- Basin wide percent of average 95 126 POWDER-TONGUE BEAR TRAP MEADOW 8200 2.5 2.2 114 3.9 4.1 95 BIG GOOSE 7990 2.9 3.6 81 5.9 4.1 144 BONE SPRINGS DIV 9350 4.9 6.8 72 5.6 6.3 89 BURGESS JUNCTION 7880 3.1 4.8 65 5.3 5.4 98 CLOUD PEAK RESERVOIR 9860 5.1 5.0 102 7.2 5.8 124 DOME LAKE 8880 3.6 5.3 68 7.0 6.2 113 GRAVE SPRINGS 8550 2.8 3.4 82 4.4 4.3 102 HANSEN SAWMILL 8360 2.8 2.7 104 5.0 3.9 128 MIDDLE POWDER 7760 2.8 4.9 57 3.9 6.1 64 POWDER RIVER PASS 9480 3.5 4.5 78 5.6 5.3 106 SUCKER CREEK 8880 3.6 4.4 82 5.8 5.8 100 TIE CREEK 6870 .6 1.8 33 4.3 4.6 93 ----- ----- Basin wide percent of average 77 103 BELLE FOURCHE BLIND PARK 6890 1.4 2.7 52 3.4 5.5 62 COLE CANYON 5910 .7 2.8 25 2.4 3.6 67 NORTH RAPID CREEK 6130 2.2 2.7 81 2.7 4.7 57 ----- ----- Basin wide percent of average 52 62 UPPER N. PLATTE RIVER COLUMBINE 9160 5.0 7.9 63 8.7 9.5 92 DIVIDE PEAK 8880 7.6 7.6 100 8.6 8.6 100 ELK RIVER 8700 5.4 5.5 98 8.3 7.4 112 JOE WRIGHT 10120 8.3 8.3 100 10.4 10.3 101 NORTH FRENCH CREEK 10130 10.0 11.2 89 10.8 10.2 106 OLD BATTLE 10000 10.7 12.6 85 13.7 13.4 102 SAGE CREEK BASIN 7850 5.1 4.4 116 7.0 5.0 140 SOUTH BRUSH CREEK 8440 4.4 4.3 102 7.7 6.7 115 TOWER 10500 10.3 17.5 59 13.7 15.1 91 WEBBER SPRINGS 9250 7.9 9.7 81 10.6 11.0 96 WILLOW CREEK PASS 9540 6.2 4.8 129 7.3 5.7 128 ----- ----- Basin wide percent of average 86 104 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 7.3 8.9 82 8.5 8.6 99 CASPER MTN. 7900 2.4 6.1 39 5.9 6.5 91 DEADMAN HILL 10220 6.8 6.6 103 6.8 6.9 99 DEER PARK 9700 4.1 5.9 69 7.6 9.4 81 LAPRELE CREEK 8375 1.1 4.5 24 3.9 5.4 72 RENO HILL 8400 3.6 5.7 63 5.6 6.4 87 ROACH 9700 6.7 6.1 110 8.7 7.2 121 SAND LAKE 10050 9.9 12.8 77 10.6 9.9 107 SOUTH PASS 9040 3.5 7.0 50 6.4 8.1 79 WINDY PEAK 7900 2.0 3.1 65 3.8 4.9 78 ----- ----- Basin wide percent of average 71 92 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 3.6 3.0 120 6.5 6.0 108 DIVIDE PEAK 8880 7.6 7.6 100 8.6 8.6 100 OLD BATTLE 10000 10.7 12.6 85 13.7 13.4 102 SANDSTONE RS 8150 5.1 4.0 127 7.9 7.5 105 WHISKEY PARK 8950 7.7 9.0 86 11.7 11.1 105 ----- ----- Basin wide percent of average 96 104 UPPER GREEN RIVER BIG SANDY OPENING 9080 4.0 5.9 68 4.9 5.7 86 BLIND BULL SUM 8650 7.2 10.9 66 7.3 9.4 78 EAST RIM DIVIDE 7930 1.7 4.9 35 4.4 4.8 92 ELKHART PARK G.S. 9400 3.6 5.3 68 5.0 5.8 86 GROS VENTRE SUMMIT 8750 5.9 5.8 102 7.1 5.6 127 GUNSIGHT PASS 9820 3.7 -M * 6.9 -M * KENDALL R.S. 7740 3.2 5.3 60 5.5 5.7 96 LOOMIS PARK 8240 4.4 6.7 66 6.2 7.0 89 NEW FORK LAKE 8340 2.6 4.4 59 4.1 5.1 80 SNIDER BASIN 8060 2.5 5.7 44 4.2 6.6 64 SPRING CREEK DIVIDE 9000 6.0 10.5 57 7.2 10.8 67 TRIPLE PEAK 8500 6.7 9.8 68 9.7 9.3 104 ----- ----- Basin wide percent of average 64 87 LOWER GREEN RIVER HAMS FORK 7840 1.7 4.3 40 3.3 4.9 67 HEWINTA 9519 1.5 3.3 45 6.3 6.3 100 HICKERSON PARK 9145 1.4 2.3 61 4.0 3.9 103 HOLE-IN-ROCK 9150 1.0 2.2 45 4.3 3.5 123 INDIAN CREEK 9425 5.8 10.3 56 6.4 10.1 63 KELLEY R.S. 8180 3.5 6.4 55 6.0 8.3 72 STEEL CREEK PARK 10200 2.5 5.6 45 6.9 6.6 105 ----- ----- Basin wide percent of average 51 85 UPPER BEAR RIVER BUG LAKE 7950 2.7 6.5 42 4.5 7.9 57 HAYDEN FORK 9212 3.6 5.0 72 6.6 8.5 78 KELLEY R.S. 8180 3.5 6.4 55 6.0 8.3 72 LILY LAKE 9156 2.0 4.5 44 6.0 7.6 79 MONTE CRISTO 8960 5.6 8.6 65 7.3 10.3 71 SALT RIVER SUMMIT 7760 2.2 4.3 51 4.7 7.4 64 TRIAL LAKE 9992 5.3 8.5 62 6.8 9.4 72 ----- ----- Basin wide percent of average 57 71 ----------------------------------------------------------------------------- -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.