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 20 , 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 5.8 122 8.4 8.5 99 BLACK BEAR 8170 13.9 14.2 98 14.2 15.1 94 BLIND BULL SUM 8650 8.9 7.8 114 7.7 7.9 97 COTTONWOOD CREEK 7670 7.1 7.0 101 8.5 9.5 89 EAST RIM DIVIDE 7930 4.8 3.5 137 4.8 4.6 104 GRAND TARGHEE 9260 17.2 14.3 120 12.8 12.7 101 GRANITE CREEK 6770 5.5 4.7 117 6.9 7.8 88 GRASSY LAKE 7265 9.5 10.0 95 11.3 13.9 81 GROS VENTRE SUMMIT 8750 5.9 4.8 123 5.4 5.3 102 GUNSIGHT PASS 9820 6.6 4.4 150 6.5 5.4 120 LEWIS LAKE DIVIDE 7850 8.6 10.2 84 10.9 14.0 78 PHILLIPS BENCH 8200 8.0 8.7 92 9.1 10.6 86 SALT RIVER SUMMIT 7760 3.8 3.7 103 5.8 6.2 94 SNAKE RIVER STATION 6920 5.5 5.2 106 7.7 9.4 82 SPRING CREEK DIVIDE 9000 7.7 8.1 95 8.2 9.2 89 THUMB DIVIDE 7980 4.5 5.0 90 5.4 7.4 73 TOGWOTEE PASS 9580 9.6 9.4 102 9.2 9.9 93 TWO OCEAN PLATEAU 9240 12.1 10.8 112 10.1 10.9 93 WILLOW CREEK 8380 9.2 8.8 105 12.8 13.2 97 YOUNTS PEAK 8350 -M 5.7 * -M 6.6 * ----- ----- Basin Index (%) 106 91 MADISON-GALLATIN BLACK BEAR 8170 13.9 14.2 98 14.2 15.1 94 CANYON 7870 4.1 4.3 95 5.6 6.6 85 MADISON PLATEAU 7750 7.4 8.5 87 8.9 10.3 86 WEST YELLOWSTONE 6700 4.1 3.6 114 5.0 5.9 85 WHISKEY CREEK 6800 5.1 5.2 98 7.0 8.3 84 ----- ----- Basin Index (%) 97 88 YELLOWSTONE BEARTOOTH LAKE 9360 8.8 8.4 105 7.5 7.7 97 BURNT MTN 5880 3.6 1.7 212 9.7 6.2 156 CANYON 7870 4.1 4.3 95 5.6 6.6 85 COLE CREEK 7850 7.4 5.6 132 6.2 5.9 105 EVENING STAR 9200 12.2 9.4 130 12.6 11.3 112 FISHER CREEK 9100 13.1 12.6 104 11.9 12.7 94 NORTHEAST ENTRANCE 7350 3.3 2.8 118 4.2 5.3 79 PARKER PEAK 9400 10.3 8.3 124 9.6 7.5 128 SYLVAN LAKE 8420 7.9 7.7 103 9.8 9.6 102 THUMB DIVIDE 7980 4.5 5.0 90 5.4 7.4 73 TWO OCEAN PLATEAU 9240 12.1 10.8 112 10.1 10.9 93 WHITE MILL 8700 9.7 8.5 114 8.3 9.6 86 WOLVERINE 7650 4.3 3.6 119 4.5 5.4 83 ----- ----- Basin Index (%) 114 99 WIND RIVER BURROUGHS CREEK 8750 -M 5.2 * -M 6.6 * CASTLE CREEK 8400 2.9 -M * 4.7 -M * COLD SPRINGS 9630 4.4 2.8 157 6.0 4.5 133 DEER PARK 9700 4.8 5.2 92 6.6 7.4 89 HOBBS PARK 10100 6.0 5.9 102 5.9 5.5 107 KIRWIN 9550 6.6 4.1 161 5.7 5.0 114 LITTLE WARM 9370 5.2 3.8 137 6.8 5.4 126 OWL CREEK 8975 3.3 2.3 143 3.4 2.6 131 SOUTH PASS 9040 5.2 5.5 95 5.7 7.2 79 ST. LAWRENCE ALT 8620 2.6 2.5 104 5.2 3.9 133 TOGWOTEE PASS 9580 9.6 9.4 102 9.2 9.9 93 TOWNSEND CREEK 8700 2.9 3.3 88 4.6 5.2 88 ----- ----- Basin Index (%) 113 104 BIGHORN BASIN BALD MTN. 9380 9.2 7.1 130 7.9 6.8 116 BEAR TRAP MEADOW 8200 3.9 2.2 177 5.4 3.8 142 BONE SPRINGS DIV 9350 7.0 6.4 109 5.8 6.2 94 GRAVE SPRINGS 8550 4.4 2.7 163 5.5 4.4 125 KIRWIN 9550 6.6 4.1 161 5.7 5.0 114 MARQUETTE 8760 4.4 -M * 5.8 -M * MIDDLE POWDER 7760 5.9 4.0 148 6.3 5.5 115 OWL CREEK 8975 3.3 2.3 143 3.4 2.6 131 POWDER RIVER PASS 9480 5.3 3.9 136 5.7 5.1 112 SHELL CREEK 9580 6.7 6.3 106 5.8 5.8 100 TIMBER CREEK 7950 3.4 1.9 179 4.9 3.6 136 ----- ----- Basin Index (%) 136 116 SHOSHONE RIVER BLACKWATER 9780 11.5 9.2 125 9.2 8.8 105 EVENING STAR 9200 12.2 9.4 130 12.6 11.3 112 MARQUETTE 8760 4.4 -M * 5.8 -M * SYLVAN ROAD 7120 4.9 4.3 114 8.2 7.9 104 YOUNTS PEAK 8350 -M 5.7 * -M 6.6 * ----- ----- Basin Index (%) 125 107 POWDER RIVER BEAR TRAP MEADOW 8200 3.9 2.2 177 5.4 3.8 142 CLOUD PEAK RESERVOIR 9860 6.7 5.1 131 7.2 5.6 129 GRAVE SPRINGS 8550 4.4 2.7 163 5.5 4.4 125 HANSEN SAWMILL 8360 3.8 2.4 158 5.4 3.7 146 MIDDLE POWDER 7760 5.9 4.0 148 6.3 5.5 115 POWDER RIVER PASS 9480 5.3 3.9 136 5.7 5.1 112 SOLDIER PARK 8720 3.3 -M * 5.3 -M * ----- ----- Basin Index (%) 148 126 TONGUE RIVER BIG GOOSE 7990 4.0 3.1 129 6.7 4.8 140 BONE SPRINGS DIV 9350 7.0 6.4 109 5.8 6.2 94 BURGESS JUNCTION 7880 4.9 4.0 122 6.9 5.2 133 DOME LAKE 8880 3.0 4.6 65 5.2 6.1 85 LITTLE GOOSE 8870 -M -M * -M -M * SUCKER CREEK 8880 6.6 4.2 157 7.9 6.0 132 TIE CREEK 6870 2.0 1.2 167 6.3 4.9 129 ----- ----- Basin Index (%) 117 117 BELLE FOURCHE COLE CANYON 5910 2.7 1.0 270 9.1 4.2 217 ----- ----- Basin Index (%) 270 217 CHEYENNE RIVER BASIN BLIND PARK 6890 3.8 2.3 165 9.6 5.2 185 NORTH RAPID CREEK 6130 3.8 2.5 152 9.2 4.4 209 ----- ----- Basin Index (%) 158 196 UPPER N. PLATTE ARAPAHO RIDGE 10960 8.6 8.0 108 8.7 9.4 93 BLACKHALL MTN 9820 11.1 -M * 12.3 -M * COLUMBINE 9160 6.8 7.3 93 9.5 9.9 96 DIVIDE PEAK 8880 6.5 6.8 96 10.0 8.9 112 JOE WRIGHT 10120 6.4 8.3 77 10.4 10.6 98 LAPRELE CREEK 8375 2.3 3.2 72 4.6 5.2 88 MED BOW 10500 9.6 -M * 12.0 -M * NORTH FRENCH CREEK 10130 9.7 10.0 97 11.4 10.4 110 NEVER SUMMER 10280 8.2 7.2 114 7.5 -M * OLD BATTLE 10000 10.6 10.9 97 12.6 14.0 90 RAWAH 9020 4.8 3.7 130 7.7 6.4 120 SAGE CREEK BASIN 7850 3.8 4.4 86 5.8 6.1 95 SAND LAKE 10050 9.7 9.7 100 10.1 9.8 103 SOUTH BRUSH CREEK 8440 4.6 4.1 112 7.2 6.3 114 TOWER 10500 13.7 17.1 80 16.0 16.0 100 WEBBER SPRINGS 9250 7.1 8.2 87 9.5 10.7 89 WILLOW CREEK PASS 9540 6.1 4.8 127 6.9 5.7 121 ZIRKEL 9340 8.0 7.8 103 11.2 11.8 95 ----- ----- Basin Index (%) 96 100 SWEETWATER DEER PARK 9700 4.8 5.2 92 6.6 7.4 89 LARSEN CREEK 9000 2.0 -M * 5.0 -M * SOUTH PASS 9040 5.2 5.5 95 5.7 7.2 79 ----- ----- Basin Index (%) 93 84 LOWER N. PLATTE CASPER MTN. 7900 7.8 5.0 156 8.0 6.6 121 LAPRELE CREEK 8375 2.3 3.2 72 4.6 5.2 88 RENO HILL 8400 7.7 5.1 151 9.5 6.3 151 WINDY PEAK 7900 2.2 2.7 81 4.9 4.6 107 ----- ----- Basin Index (%) 125 119 LARAMIE RIVER BROOKLYN LAKE 10240 7.0 6.9 101 7.7 7.9 97 CINNABAR PARK 9574 6.9 7.5 92 8.7 9.8 89 CROW CREEK 8330 2.0 3.8 53 4.6 4.6 100 DEADMAN HILL 10220 7.8 6.1 128 8.2 6.7 122 RAWAH 9020 4.8 3.7 130 7.7 6.4 120 ROACH 9700 6.0 5.6 107 8.3 7.7 108 ----- ----- Basin Index (%) 103 105 S. PLATTE BLACK MOUNTAIN 8920 4.2 -M * 5.6 -M * CROW CREEK 8330 2.0 3.8 53 4.6 4.6 100 DEADMAN HILL 10220 7.8 6.1 128 8.2 6.7 122 ----- ----- Basin Index (%) 99 113 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 4.2 3.1 135 8.0 6.1 131 DIVIDE PEAK 8880 6.5 6.8 96 10.0 8.9 112 ELK RIVER 8700 5.8 5.3 109 8.6 7.7 112 LITTLE SNAKE RIVER 8915 7.5 6.6 114 12.7 12.6 101 OLD BATTLE 10000 10.6 10.9 97 12.6 14.0 90 SAGE CREEK BASIN 7850 3.8 4.4 86 5.8 6.1 95 SANDSTONE RS 8150 3.9 3.8 103 7.8 7.4 105 WHISKEY PARK 8950 10.1 8.0 126 13.1 10.3 127 ----- ----- Basin Index (%) 107 108 UPPER GREEN RIVER BIG SANDY OPENING 9080 4.6 4.7 98 4.5 5.3 85 BLIND BULL SUM 8650 8.9 7.8 114 7.7 7.9 97 EAST RIM DIVIDE 7930 4.8 3.5 137 4.8 4.6 104 ELKHART PARK G.S. 9400 5.5 4.5 122 5.9 5.4 109 GROS VENTRE SUMMIT 8750 5.9 4.8 123 5.4 5.3 102 GUNSIGHT PASS 9820 6.6 4.4 150 6.5 5.4 120 KENDALL R.S. 7740 5.2 3.9 133 6.2 5.4 115 LOOMIS PARK 8240 5.5 5.1 108 6.8 6.7 101 NEW FORK LAKE 8340 4.1 3.5 117 4.3 4.4 98 POCKET CREEK 9360 4.6 -M * 4.2 -M * SNIDER BASIN 8060 4.3 4.2 102 5.2 5.5 95 SPRING CREEK DIVIDE 9000 7.7 8.1 95 8.2 9.2 89 TRIPLE PEAK 8500 6.9 7.1 97 8.6 9.3 92 ----- ----- Basin Index (%) 114 100 LOWER GREEN RIVER BLACKS FORK JCT 8870 2.1 -M * 4.9 -M * BUCK PASTURE 9700 3.4 -M * 6.0 -M * EF BLACKS FORK GS 9360 1.6 -M * 4.2 -M * HAMS FORK 7840 2.3 3.5 66 4.4 4.4 100 HEWINTA 9519 1.9 3.1 61 5.1 5.8 88 HICKERSON PARK 9145 3.1 2.1 148 4.7 4.5 104 HOLE-IN-ROCK 9150 2.6 2.4 108 4.4 4.2 105 INDIAN CREEK 9425 6.5 8.5 76 6.8 8.3 82 KELLEY R.S. 8180 4.3 4.8 90 6.0 7.0 86 SPIRIT LK 10235 4.0 -M * 6.5 -M * STEEL CREEK PARK 10200 5.0 5.5 91 6.2 6.6 94 ----- ----- Basin Index (%) 86 92 UPPER BEAR RIVER BEAR RIVER RS 8777 2.6 -M * 5.1 -M * BUG LAKE 7950 3.9 5.4 72 6.0 7.7 78 BURTS MILLER RANCH 8000 2.5 -M * 3.1 -M * CHALK CREEK #1 8993 7.6 8.8 86 8.9 10.1 88 HAYDEN FORK 9212 3.6 4.5 80 7.0 8.2 85 KELLEY R.S. 8180 4.3 4.8 90 6.0 7.0 86 LILY LAKE 9156 3.6 4.5 80 6.5 7.1 92 MONTE CRISTO 8960 6.8 8.5 80 7.6 10.0 76 SALT RIVER SUMMIT 7760 3.8 3.7 103 5.8 6.2 94 ----- ----- Basin Index (%) 84 85 ----------------------------------------------------------------------------- -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.