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 TUESDAY: DECEMBER 17 , 2013 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER BASE CAMP 7030 7.1 5.6 127 8.4 8.2 102 BLACK BEAR 8170 13.7 13.5 101 14.0 14.4 97 BLIND BULL SUM 8650 8.9 7.4 120 7.6 7.7 99 COTTONWOOD CREEK 7670 6.8 6.6 103 8.3 9.1 91 EAST RIM DIVIDE 7930 4.7 3.2 147 4.8 4.5 107 GRAND TARGHEE 9260 17.1 13.7 125 12.8 12.3 104 GRANITE CREEK 6770 5.4 4.4 123 6.9 7.5 92 GRASSY LAKE 7265 9.6 9.5 101 11.5 13.5 85 GROS VENTRE SUMMIT 8750 5.7 4.7 121 5.4 5.1 106 GUNSIGHT PASS 9820 6.5 4.2 155 6.4 5.2 123 LEWIS LAKE DIVIDE 7850 8.7 9.7 90 11.0 13.6 81 PHILLIPS BENCH 8200 8.1 8.3 98 9.2 10.2 90 SALT RIVER SUMMIT 7760 3.6 3.4 106 5.7 6.0 95 SNAKE RIVER STATION 6920 5.3 4.9 108 7.6 9.0 84 SPRING CREEK DIVIDE 9000 7.4 7.8 95 8.0 8.8 91 THUMB DIVIDE 7980 4.7 4.5 104 5.6 7.2 78 TOGWOTEE PASS 9580 9.6 9.1 105 9.1 9.5 96 TWO OCEAN PLATEAU 9240 12.0 10.6 113 10.2 10.6 96 WILLOW CREEK 8380 8.9 8.3 107 12.4 12.8 97 YOUNTS PEAK 8350 -M 5.5 * -M 6.4 * ----- ----- Basin Index (%) 110 94 MADISON-GALLATIN BLACK BEAR 8170 13.7 13.5 101 14.0 14.4 97 CANYON 7870 4.0 4.1 98 5.6 6.4 88 MADISON PLATEAU 7750 7.3 7.9 92 8.9 10.0 89 WEST YELLOWSTONE 6700 3.9 3.3 118 5.0 5.7 88 WHISKEY CREEK 6800 5.0 4.7 106 7.0 8.0 88 ----- ----- Basin Index (%) 101 91 YELLOWSTONE BEARTOOTH LAKE 9360 8.6 7.9 109 7.3 7.5 97 BURNT MTN 5880 3.6 1.6 225 9.6 6.1 157 CANYON 7870 4.0 4.1 98 5.6 6.4 88 COLE CREEK 7850 7.4 5.6 132 6.1 5.7 107 EVENING STAR 9200 11.9 9.0 132 12.4 10.9 114 FISHER CREEK 9100 12.9 11.8 109 11.6 12.2 95 NORTHEAST ENTRANCE 7350 3.2 2.7 119 4.2 5.2 81 PARKER PEAK 9400 10.0 7.9 127 9.5 7.2 132 SYLVAN LAKE 8420 7.7 7.3 105 9.5 9.3 102 THUMB DIVIDE 7980 4.7 4.5 104 5.6 7.2 78 TWO OCEAN PLATEAU 9240 12.0 10.6 113 10.2 10.6 96 WHITE MILL 8700 9.6 8.0 120 8.3 9.3 89 WOLVERINE 7650 4.1 3.4 121 4.3 5.2 83 ----- ----- Basin Index (%) 118 101 WIND RIVER BURROUGHS CREEK 8750 -M 5.0 * -M 6.4 * CASTLE CREEK 8400 2.7 -M * 4.5 -M * COLD SPRINGS 9630 4.2 2.7 156 5.8 4.4 132 DEER PARK 9700 4.6 5.0 92 6.3 7.3 86 HOBBS PARK 10100 5.8 5.8 100 5.8 5.4 107 KIRWIN 9550 6.5 4.0 162 5.6 4.8 117 LITTLE WARM 9370 5.1 3.7 138 6.6 5.2 127 OWL CREEK 8975 3.2 2.2 145 3.2 2.6 123 SOUTH PASS 9040 5.0 5.3 94 5.6 7.1 79 ST. LAWRENCE ALT 8620 2.2 2.6 85 5.0 3.8 132 TOGWOTEE PASS 9580 9.6 9.1 105 9.1 9.5 96 TOWNSEND CREEK 8700 2.6 3.3 79 4.1 5.2 79 ----- ----- Basin Index (%) 112 103 BIGHORN BASIN BALD MTN. 9380 9.2 6.9 133 7.8 6.6 118 BEAR TRAP MEADOW 8200 3.8 2.1 181 5.2 3.7 141 BONE SPRINGS DIV 9350 7.0 6.2 113 5.8 6.0 97 GRAVE SPRINGS 8550 4.1 2.5 164 5.4 4.3 126 KIRWIN 9550 6.5 4.0 162 5.6 4.8 117 MARQUETTE 8760 4.3 -M * 5.7 -M * MIDDLE POWDER 7760 5.8 3.7 157 6.2 5.3 117 OWL CREEK 8975 3.2 2.2 145 3.2 2.6 123 POWDER RIVER PASS 9480 5.2 3.7 141 5.6 5.0 112 SHELL CREEK 9580 6.6 6.0 110 5.7 5.6 102 TIMBER CREEK 7950 3.3 1.9 174 4.7 3.6 131 ----- ----- Basin Index (%) 140 116 SHOSHONE RIVER BLACKWATER 9780 11.4 8.8 130 9.0 8.5 106 EVENING STAR 9200 11.9 9.0 132 12.4 10.9 114 MARQUETTE 8760 4.3 -M * 5.7 -M * SYLVAN ROAD 7120 4.8 4.1 117 8.1 7.6 107 YOUNTS PEAK 8350 -M 5.5 * -M 6.4 * ----- ----- Basin Index (%) 128 109 POWDER RIVER BEAR TRAP MEADOW 8200 3.8 2.1 181 5.2 3.7 141 CLOUD PEAK RESERVOIR 9860 6.5 4.9 133 7.0 5.5 127 GRAVE SPRINGS 8550 4.1 2.5 164 5.4 4.3 126 HANSEN SAWMILL 8360 3.7 2.2 168 5.2 3.6 144 MIDDLE POWDER 7760 5.8 3.7 157 6.2 5.3 117 POWDER RIVER PASS 9480 5.2 3.7 141 5.6 5.0 112 SOLDIER PARK 8720 3.2 -M * 5.1 -M * ----- ----- Basin Index (%) 152 126 TONGUE RIVER BIG GOOSE 7990 3.9 3.0 130 6.5 4.6 141 BONE SPRINGS DIV 9350 7.0 6.2 113 5.8 6.0 97 BURGESS JUNCTION 7880 4.8 3.8 126 6.7 5.0 134 DOME LAKE 8880 2.9 4.4 66 5.0 5.9 85 LITTLE GOOSE 8870 -M -M * -M -M * SUCKER CREEK 8880 6.5 4.1 159 7.8 5.7 137 TIE CREEK 6870 2.0 1.1 182 6.3 4.8 131 ----- ----- Basin Index (%) 120 119 BELLE FOURCHE COLE CANYON 5910 2.6 1.0 260 9.0 4.1 220 ----- ----- Basin Index (%) 260 220 CHEYENNE RIVER BASIN BLIND PARK 6890 3.5 2.1 167 9.4 5.1 184 NORTH RAPID CREEK 6130 3.7 2.4 154 9.2 4.3 214 ----- ----- Basin Index (%) 160 198 UPPER N. PLATTE ARAPAHO RIDGE 10960 8.5 7.5 113 8.7 9.1 96 BLACKHALL MTN 9820 10.9 -M * 12.2 -M * COLUMBINE 9160 6.5 6.7 97 9.3 9.4 99 DIVIDE PEAK 8880 6.4 6.3 102 9.9 8.5 116 JOE WRIGHT 10120 6.5 7.9 82 10.3 10.2 101 LAPRELE CREEK 8375 2.2 3.0 73 4.5 5.0 90 MED BOW 10500 9.4 -M * 12.0 -M * NORTH FRENCH CREEK 10130 9.6 9.4 102 11.4 9.9 115 NEVER SUMMER 10280 7.9 6.8 116 7.5 -M * OLD BATTLE 10000 10.2 10.3 99 12.2 13.3 92 RAWAH 9020 4.8 3.6 133 7.6 6.1 125 SAGE CREEK BASIN 7850 3.6 4.1 88 5.7 5.8 98 SAND LAKE 10050 9.7 9.3 104 10.0 9.3 108 SOUTH BRUSH CREEK 8440 4.5 3.8 118 7.1 6.0 118 TOWER 10500 13.4 16.0 84 15.8 15.2 104 WEBBER SPRINGS 9250 6.7 7.9 85 9.3 10.3 90 WILLOW CREEK PASS 9540 6.0 4.5 133 6.8 5.5 124 ZIRKEL 9340 7.8 7.5 104 11.1 11.1 100 ----- ----- Basin Index (%) 100 104 SWEETWATER DEER PARK 9700 4.6 5.0 92 6.3 7.3 86 LARSEN CREEK 9000 1.5 -M * 4.5 -M * SOUTH PASS 9040 5.0 5.3 94 5.6 7.1 79 ----- ----- Basin Index (%) 93 83 LOWER N. PLATTE CASPER MTN. 7900 6.8 4.7 145 7.6 6.4 119 LAPRELE CREEK 8375 2.2 3.0 73 4.5 5.0 90 RENO HILL 8400 7.2 4.9 147 9.3 6.1 152 WINDY PEAK 7900 2.1 2.5 84 4.7 4.4 107 ----- ----- Basin Index (%) 121 119 LARAMIE RIVER BROOKLYN LAKE 10240 7.0 6.5 108 7.7 7.6 101 CINNABAR PARK 9574 6.8 7.4 92 8.7 9.2 95 CROW CREEK 8330 2.1 3.6 58 4.7 4.4 107 DEADMAN HILL 10220 7.7 5.6 138 8.3 6.5 128 RAWAH 9020 4.8 3.6 133 7.6 6.1 125 ROACH 9700 6.0 5.2 115 8.3 7.3 114 ----- ----- Basin Index (%) 108 110 S. PLATTE BLACK MOUNTAIN 8920 4.3 -M * 5.6 -M * CROW CREEK 8330 2.1 3.6 58 4.7 4.4 107 DEADMAN HILL 10220 7.7 5.6 138 8.3 6.5 128 ----- ----- Basin Index (%) 107 119 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 4.1 2.8 146 7.7 5.8 133 DIVIDE PEAK 8880 6.4 6.3 102 9.9 8.5 116 ELK RIVER 8700 5.9 4.9 120 8.6 7.4 116 LITTLE SNAKE RIVER 8915 7.1 6.0 118 12.4 11.9 104 OLD BATTLE 10000 10.2 10.3 99 12.2 13.3 92 SAGE CREEK BASIN 7850 3.6 4.1 88 5.7 5.8 98 SANDSTONE RS 8150 3.8 3.6 106 7.7 7.1 108 WHISKEY PARK 8950 10.0 7.5 133 12.9 9.8 132 ----- ----- Basin Index (%) 112 111 UPPER GREEN RIVER BIG SANDY OPENING 9080 4.0 4.6 87 4.0 5.2 77 BLIND BULL SUM 8650 8.9 7.4 120 7.6 7.7 99 EAST RIM DIVIDE 7930 4.7 3.2 147 4.8 4.5 107 ELKHART PARK G.S. 9400 5.4 4.3 126 5.9 5.3 111 GROS VENTRE SUMMIT 8750 5.7 4.7 121 5.4 5.1 106 GUNSIGHT PASS 9820 6.5 4.2 155 6.4 5.2 123 KENDALL R.S. 7740 5.1 3.6 142 6.2 5.3 117 LOOMIS PARK 8240 5.5 4.8 115 6.8 6.5 105 NEW FORK LAKE 8340 3.9 3.4 115 4.3 4.2 102 POCKET CREEK 9360 4.6 -M * 4.0 -M * SNIDER BASIN 8060 4.1 3.8 108 5.2 5.2 100 SPRING CREEK DIVIDE 9000 7.4 7.8 95 8.0 8.8 91 TRIPLE PEAK 8500 6.8 6.6 103 8.5 9.0 94 ----- ----- Basin Index (%) 116 102 LOWER GREEN RIVER BLACKS FORK JCT 8870 1.7 -M * 4.6 -M * BUCK PASTURE 9700 2.9 -M * 5.8 -M * EF BLACKS FORK GS 9360 1.5 -M * 4.0 -M * HAMS FORK 7840 1.7 3.4 50 3.9 4.3 91 HEWINTA 9519 1.8 2.8 64 4.9 5.7 86 HICKERSON PARK 9145 3.0 2.0 150 4.6 4.4 105 HOLE-IN-ROCK 9150 2.1 2.3 91 4.1 4.1 100 INDIAN CREEK 9425 6.0 7.9 76 6.4 7.9 81 KELLEY R.S. 8180 3.8 4.5 84 5.6 6.8 82 SPIRIT LK 10235 3.6 -M * 6.2 -M * STEEL CREEK PARK 10200 5.2 5.4 96 5.9 6.5 91 ----- ----- Basin Index (%) 83 89 UPPER BEAR RIVER BEAR RIVER RS 8777 2.1 -M * 4.7 -M * BUG LAKE 7950 3.8 5.2 73 5.3 7.4 72 BURTS MILLER RANCH 8000 2.2 -M * 2.9 -M * CHALK CREEK #1 8993 6.7 8.3 81 8.0 9.8 82 HAYDEN FORK 9212 3.0 4.2 71 6.3 8.0 79 KELLEY R.S. 8180 3.8 4.5 84 5.6 6.8 82 LILY LAKE 9156 3.1 4.3 72 6.1 6.9 88 MONTE CRISTO 8960 5.9 8.0 74 6.9 9.7 71 SALT RIVER SUMMIT 7760 3.6 3.4 106 5.7 6.0 95 ----- ----- Basin Index (%) 79 80 ----------------------------------------------------------------------------- -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. ---------------------------------------------------------------------------- -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.