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: NOVEMBER 20 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 1.0 2.5 40 3.4 4.3 79 COTTONWOOD CREEK 7670 .7 2.9 24 4.6 5.9 78 GRAND TARGHEE 9260 7.7 -M * 6.7 -M * GRANITE CREEK 6770 .2 2.0 10 2.8 3.7 76 GRASSY LAKE 7265 2.3 4.8 48 5.0 6.8 74 GROS VENTRE SUMMIT 8750 2.2 2.8 79 2.3 3.3 70 GUNSIGHT PASS 9820 2.0 -M * 3.3 -M * LEWIS LAKE DIVIDE 7850 3.0 4.7 64 5.5 6.8 81 PHILLIPS BENCH 8200 1.8 4.1 44 3.8 5.1 75 SALT RIVER SUMMIT 7760 .4 1.5 27 2.6 3.6 72 SNAKE RIVER STATION 6920 1.0 2.4 42 4.9 4.5 109 SPRING CREEK DIVIDE 9000 3.7 4.4 84 4.5 5.3 85 THUMB DIVIDE 7980 2.2 2.6 85 5.5 3.9 141 TOGWOTEE PASS 9580 5.0 5.2 96 5.3 5.4 98 TWO OCEAN PLATEAU 9240 6.9 6.1 113 5.4 6.0 90 WILLOW CREEK 8380 2.2 5.1 43 6.4 6.9 93 ----- ----- Basin wide percent of average 64 87 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 5.2 5.1 102 4.3 4.2 102 BLACK BEAR 8170 6.4 6.3 102 7.7 7.5 103 CANYON 7870 2.4 2.0 120 4.0 3.6 111 FISHER CREEK 9100 7.5 6.0 125 7.7 6.9 112 MADISON PLATEAU 7750 4.0 3.8 105 7.0 5.1 137 NORTHEAST ENTRANCE 7350 .6 1.3 46 3.4 3.0 113 PARKER PEAK 9400 5.8 4.9 118 4.4 4.1 107 SYLVAN LAKE 8420 2.8 4.4 64 4.8 5.1 94 THUMB DIVIDE 7980 2.2 2.6 85 5.5 3.9 141 TWO OCEAN PLATEAU 9240 6.9 6.1 113 5.4 6.0 90 WHISKEY CREEK 6800 1.5 2.3 65 4.5 4.3 105 WHITE MILL 8700 5.5 4.4 125 5.3 5.5 96 WOLVERINE 7650 1.0 1.7 59 2.7 3.3 82 ----- ----- Basin wide percent of average 102 107 WIND RIVER BURROUGHS CREEK 8750 3.2 2.6 123 2.9 3.5 83 COLD SPRINGS 9630 2.5 2.3 109 3.2 3.4 94 DEER PARK 9700 5.2 3.8 137 6.3 5.3 119 HOBBS PARK 10100 5.5 4.0 138 5.3 3.7 143 LITTLE WARM 9370 2.0 2.4 83 2.7 3.5 77 SOUTH PASS 9040 4.3 3.5 123 5.3 4.4 120 ST. LAWRENCE ALT 8620 1.9 1.9 100 3.9 2.9 134 TOGWOTEE PASS 9580 5.0 5.2 96 5.3 5.4 98 TOWNSEND CREEK 8700 3.1 2.1 148 5.1 3.6 142 ----- ----- Basin wide percent of average 118 112 BIGHORN BASIN BALD MTN. 9380 4.1 4.7 87 3.5 4.2 83 BEAR TRAP MEADOW 8200 1.3 1.2 108 2.2 2.8 79 BLACKWATER 9780 6.6 5.7 116 5.7 5.2 110 BONE SPRINGS DIV 9350 3.7 4.4 84 3.4 4.0 85 EVENING STAR 9200 6.1 5.7 107 7.3 5.9 124 GRAVE SPRINGS 8550 2.6 2.3 113 3.9 3.0 130 KIRWIN 9550 3.3 3.2 103 2.9 3.3 88 MARQUETTE 8760 3.0 2.9 103 3.4 3.5 97 MIDDLE POWDER 7760 2.7 2.7 100 3.5 4.1 85 OWL CREEK 8975 2.4 1.6 150 2.1 1.9 111 POWDER RIVER PASS 9480 2.1 2.5 84 2.5 3.2 78 SHELL CREEK 9580 4.0 4.2 95 3.6 3.5 103 SYLVAN LAKE 8420 2.8 4.4 64 4.8 5.1 94 SYLVAN ROAD 7120 1.4 2.0 70 4.1 4.7 87 TIMBER CREEK 7950 .9 2.0 45 2.5 2.6 96 YOUNTS PEAK 8350 3.3 3.2 103 2.8 3.8 74 ----- ----- Basin wide percent of average 95 96 SHOSHONE RIVER BLACKWATER 9780 6.6 5.7 116 5.7 5.2 110 EVENING STAR 9200 6.1 5.7 107 7.3 5.9 124 KIRWIN 9550 3.3 3.2 103 2.9 3.3 88 MARQUETTE 8760 3.0 2.9 103 3.4 3.5 97 SYLVAN LAKE 8420 2.8 4.4 64 4.8 5.1 94 SYLVAN ROAD 7120 1.4 2.0 70 4.1 4.7 87 YOUNTS PEAK 8350 3.3 3.2 103 2.8 3.8 74 ----- ----- Basin wide percent of average 98 98 POWDER-TONGUE BEAR TRAP MEADOW 8200 1.3 1.2 108 2.2 2.8 79 BIG GOOSE 7990 2.0 1.7 118 3.6 2.7 133 BONE SPRINGS DIV 9350 3.7 4.4 84 3.4 4.0 85 BURGESS JUNCTION 7880 3.3 2.8 118 4.2 3.5 120 CLOUD PEAK RESERVOIR 9860 3.9 2.9 134 3.7 4.1 90 DOME LAKE 8880 2.7 3.4 79 3.9 4.0 98 GRAVE SPRINGS 8550 2.6 2.3 113 3.9 3.0 130 HANSEN SAWMILL 8360 1.4 1.5 93 2.3 2.8 82 MIDDLE POWDER 7760 2.7 2.7 100 3.5 4.1 85 POWDER RIVER PASS 9480 2.1 2.5 84 2.5 3.2 78 SUCKER CREEK 8880 4.0 2.5 160 4.6 3.8 121 TIE CREEK 6870 .0 1.2 0 4.3 3.3 130 ----- ----- Basin wide percent of average 102 102 BELLE FOURCHE BLIND PARK 6890 1.2 1.6 75 4.3 3.8 113 COLE CANYON 5910 .0 1.6 0 4.0 2.6 154 NORTH RAPID CREEK 6130 1.4 1.2 117 4.3 3.4 126 ----- ----- Basin wide percent of average 59 129 UPPER N. PLATTE RIVER COLUMBINE 9160 1.5 3.2 47 4.8 4.6 104 DIVIDE PEAK 8880 3.8 3.6 106 7.0 4.7 149 ELK RIVER 8700 1.2 1.9 63 4.4 3.9 113 JOE WRIGHT 10120 5.4 5.0 108 5.8 6.1 95 NORTH FRENCH CREEK 10130 8.7 5.9 147 9.0 5.9 153 OLD BATTLE 10000 9.1 6.5 140 9.5 6.8 140 SAGE CREEK BASIN 7850 1.9 2.1 90 4.1 2.8 146 SOUTH BRUSH CREEK 8440 2.1 2.0 105 5.6 4.3 130 TOWER 10500 8.3 8.9 93 8.4 7.8 108 WEBBER SPRINGS 9250 4.5 4.6 98 7.7 5.8 133 WILLOW CREEK PASS 9540 2.5 2.7 93 3.6 3.5 103 ----- ----- Basin wide percent of average 106 124 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 5.6 4.3 130 6.7 4.7 143 CASPER MTN. 7900 3.0 3.5 86 4.4 4.3 102 DEADMAN HILL 10220 .4 4.0 10 6.1 4.2 145 DEER PARK 9700 5.2 3.8 137 6.3 5.3 119 LAPRELE CREEK 8375 2.0 2.3 87 4.3 3.4 126 RENO HILL 8400 4.0 3.2 125 5.4 4.2 129 ROACH 9700 4.7 3.0 157 6.5 4.1 159 SAND LAKE 10050 9.1 6.8 134 9.5 5.5 173 SOUTH PASS 9040 4.3 3.5 123 5.3 4.4 120 WINDY PEAK 7900 1.4 1.6 87 4.0 2.9 138 ----- ----- Basin wide percent of average 110 136 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .9 1.3 69 3.3 3.4 97 DIVIDE PEAK 8880 3.8 3.6 106 7.0 4.7 149 OLD BATTLE 10000 9.1 6.5 140 9.5 6.8 140 SANDSTONE RS 8150 .0 1.5 0 3.7 4.3 86 WHISKEY PARK 8950 2.9 4.3 67 7.3 5.6 130 ----- ----- Basin wide percent of average 97 124 UPPER GREEN RIVER BIG SANDY OPENING 9080 3.1 2.8 111 3.3 3.3 100 BLIND BULL SUM 8650 3.0 4.6 65 2.8 4.5 62 EAST RIM DIVIDE 7930 .2 2.0 10 2.1 2.6 81 ELKHART PARK G.S. 9400 2.3 2.3 100 2.9 3.4 85 GROS VENTRE SUMMIT 8750 2.2 2.8 79 2.3 3.3 70 GUNSIGHT PASS 9820 2.0 -M * 3.3 -M * KENDALL R.S. 7740 .2 2.0 10 2.2 3.0 73 LOOMIS PARK 8240 .5 2.8 18 2.6 3.6 72 NEW FORK LAKE 8340 .3 1.8 17 1.8 3.0 60 SNIDER BASIN 8060 1.2 2.3 52 2.8 3.3 85 SPRING CREEK DIVIDE 9000 3.7 4.4 84 4.5 5.3 85 TRIPLE PEAK 8500 4.2 4.0 105 4.9 4.7 104 ----- ----- Basin wide percent of average 66 80 LOWER GREEN RIVER HAMS FORK 7840 .3 1.5 20 3.2 2.7 119 HEWINTA 9519 .3 1.6 19 3.0 3.9 77 HICKERSON PARK 9145 .3 1.1 27 3.5 2.7 130 HOLE-IN-ROCK 9150 1.3 1.1 118 3.8 2.5 152 INDIAN CREEK 9425 4.6 4.4 105 5.1 5.1 100 KELLEY R.S. 8180 2.0 2.8 71 3.9 4.2 93 STEEL CREEK PARK 10200 2.7 3.0 90 4.0 4.1 98 ----- ----- Basin wide percent of average 74 105 UPPER BEAR RIVER BUG LAKE 7950 .1 2.8 4 4.0 4.3 93 HAYDEN FORK 9212 1.1 2.0 55 3.9 4.6 85 KELLEY R.S. 8180 2.0 2.8 71 3.9 4.2 93 LILY LAKE 9156 1.6 2.1 76 3.3 4.4 75 MONTE CRISTO 8960 2.3 3.5 66 4.6 5.3 87 SALT RIVER SUMMIT 7760 .4 1.5 27 2.6 3.6 72 TRIAL LAKE 9992 2.8 4.0 70 3.6 5.1 71 ----- ----- Basin wide percent of average 55 82 ----------------------------------------------------------------------------- -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.