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 WEDNESDAY: FEBRUARY 18 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 11.5 14.7 78 14.2 17.0 84 COTTONWOOD CREEK 7670 19.3 16.5 117 22.9 21.1 109 GRAND TARGHEE 9260 29.5 -M * 25.5 -M * GRANITE CREEK 6770 12.1 14.6 83 16.6 15.9 104 GRASSY LAKE 7265 23.1 26.9 86 26.2 28.5 92 GROS VENTRE SUMMIT 8750 8.8 10.6 83 10.6 9.8 108 GUNSIGHT PASS 9820 10.5 -M * 11.5 -M * LEWIS LAKE DIVIDE 7850 18.9 27.0 70 23.0 28.7 80 PHILLIPS BENCH 8200 19.0 21.7 88 21.2 22.5 94 SALT RIVER SUMMIT 7760 9.9 11.1 89 11.4 14.5 79 SNAKE RIVER STATION 6920 12.2 15.0 81 16.3 17.9 91 SPRING CREEK DIVIDE 9000 19.1 20.2 95 19.6 20.7 95 THUMB DIVIDE 7980 11.5 13.8 83 13.3 14.6 91 TOGWOTEE PASS 9580 20.3 19.2 106 22.3 19.0 117 TWO OCEAN PLATEAU 9240 25.2 21.6 117 19.8 21.3 93 WILLOW CREEK 8380 24.3 23.3 104 28.8 24.8 116 ----- ----- Basin wide percent of average 92 96 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 16.2 18.6 87 14.8 15.8 94 BLACK BEAR 8170 24.1 30.1 80 25.1 30.2 83 CANYON 7870 9.1 10.4 87 9.9 12.1 82 FISHER CREEK 9100 26.0 27.3 95 24.4 28.0 87 MADISON PLATEAU 7750 13.6 19.1 71 15.6 20.1 78 NORTHEAST ENTRANCE 7350 7.7 9.0 86 10.0 10.0 100 PARKER PEAK 9400 18.4 16.8 110 13.5 12.6 107 SYLVAN LAKE 8420 13.7 17.3 79 16.0 16.6 96 THUMB DIVIDE 7980 11.5 13.8 83 13.3 14.6 91 TWO OCEAN PLATEAU 9240 25.2 21.6 117 19.8 21.3 93 WHISKEY CREEK 6800 10.0 13.1 76 13.0 15.8 82 WHITE MILL 8700 17.2 18.6 92 17.1 20.8 82 WOLVERINE 7650 8.9 9.9 90 8.8 10.4 85 ----- ----- Basin wide percent of average 89 88 WIND RIVER BURROUGHS CREEK 8750 12.3 11.6 106 13.0 12.7 102 COLD SPRINGS 9630 5.0 6.6 76 6.8 7.8 87 DEER PARK 9700 6.8 13.9 49 10.5 16.5 64 HOBBS PARK 10100 7.2 11.0 65 7.5 9.1 82 LITTLE WARM 9370 7.9 8.8 90 10.0 10.1 99 SOUTH PASS 9040 7.2 13.0 55 9.4 13.9 68 ST. LAWRENCE ALT 8620 1.9 5.4 35 4.9 6.5 75 TOGWOTEE PASS 9580 20.3 19.2 106 22.3 19.0 117 TOWNSEND CREEK 8700 4.3 6.5 66 6.6 8.2 80 ----- ----- Basin wide percent of average 76 88 BIGHORN BASIN BALD MTN. 9380 14.7 14.8 99 12.1 13.1 92 BEAR TRAP MEADOW 8200 6.6 4.0 165 7.0 6.0 117 BLACKWATER 9780 16.7 18.8 89 15.4 15.9 97 BONE SPRINGS DIV 9350 14.9 12.0 124 11.6 10.8 107 EVENING STAR 9200 21.5 23.0 93 22.7 20.1 113 GRAVE SPRINGS 8550 5.9 6.5 91 7.0 7.1 99 KIRWIN 9550 8.9 8.5 105 10.1 8.5 119 MARQUETTE 8760 3.0 6.4 47 6.0 6.9 87 MIDDLE POWDER 7760 7.4 8.2 90 7.9 9.0 88 OWL CREEK 8975 4.0 3.8 105 3.9 4.1 95 POWDER RIVER PASS 9480 10.1 8.0 126 11.5 9.3 124 SHELL CREEK 9580 13.4 10.9 123 13.0 10.2 127 SYLVAN LAKE 8420 13.7 17.3 79 16.0 16.6 96 SYLVAN ROAD 7120 10.6 10.5 101 13.8 14.7 94 TIMBER CREEK 7950 2.8 4.0 70 6.0 5.0 120 YOUNTS PEAK 8350 14.1 13.6 104 12.9 12.6 102 ----- ----- Basin wide percent of average 99 104 SHOSHONE RIVER BLACKWATER 9780 16.7 18.8 89 15.4 15.9 97 EVENING STAR 9200 21.5 23.0 93 22.7 20.1 113 KIRWIN 9550 8.9 8.5 105 10.1 8.5 119 MARQUETTE 8760 3.0 6.4 47 6.0 6.9 87 SYLVAN LAKE 8420 13.7 17.3 79 16.0 16.6 96 SYLVAN ROAD 7120 10.6 10.5 101 13.8 14.7 94 YOUNTS PEAK 8350 14.1 13.6 104 12.9 12.6 102 ----- ----- Basin wide percent of average 90 102 POWDER-TONGUE BEAR TRAP MEADOW 8200 6.6 4.0 165 7.0 6.0 117 BIG GOOSE 7990 6.6 7.0 94 8.7 6.3 138 BONE SPRINGS DIV 9350 14.9 12.0 124 11.6 10.8 107 BURGESS JUNCTION 7880 8.9 8.3 107 9.8 8.8 111 CLOUD PEAK RESERVOIR 9860 13.1 9.1 144 12.6 9.1 138 DOME LAKE 8880 9.3 8.9 104 11.3 9.6 118 GRAVE SPRINGS 8550 5.9 6.5 91 7.0 7.1 99 HANSEN SAWMILL 8360 4.8 4.7 102 7.5 5.8 129 MIDDLE POWDER 7760 7.4 8.2 90 7.9 9.0 88 POWDER RIVER PASS 9480 10.1 8.0 126 11.5 9.3 124 SUCKER CREEK 8880 10.7 8.3 129 12.7 9.8 130 TIE CREEK 6870 3.7 4.6 80 10.2 7.4 138 ----- ----- Basin wide percent of average 114 119 BELLE FOURCHE BLIND PARK 6890 8.1 6.2 131 12.5 8.6 145 COLE CANYON 5910 4.8 5.2 92 9.4 5.2 181 NORTH RAPID CREEK 6130 7.8 6.1 128 10.8 7.0 154 ----- ----- Basin wide percent of average 118 157 UPPER N. PLATTE RIVER COLUMBINE 9160 20.9 19.8 106 19.5 19.1 102 DIVIDE PEAK 8880 17.7 14.4 123 19.3 15.5 125 ELK RIVER 8700 18.8 14.6 129 17.4 14.6 119 JOE WRIGHT 10120 17.2 15.9 108 20.8 18.4 113 NORTH FRENCH CREEK 10130 24.9 20.7 120 23.6 18.5 128 OLD BATTLE 10000 25.2 23.6 107 30.1 25.8 117 SAGE CREEK BASIN 7850 9.9 8.4 118 11.3 9.0 126 SOUTH BRUSH CREEK 8440 10.4 8.8 118 12.0 12.3 98 TOWER 10500 33.1 34.6 96 31.7 29.2 109 WEBBER SPRINGS 9250 19.2 19.0 101 22.3 20.3 110 WILLOW CREEK PASS 9540 10.2 8.7 117 9.2 9.5 97 ----- ----- Basin wide percent of average 110 113 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 16.8 17.5 96 15.5 16.0 97 CASPER MTN. 7900 7.9 10.3 77 10.2 10.1 101 DEADMAN HILL 10220 12.0 12.0 100 12.3 12.0 103 DEER PARK 9700 6.8 13.9 49 10.5 16.5 64 LAPRELE CREEK 8375 7.3 8.2 89 7.8 9.1 86 RENO HILL 8400 8.5 9.5 89 9.7 10.5 92 ROACH 9700 12.3 12.8 96 14.1 13.3 106 SAND LAKE 10050 21.6 22.8 95 19.7 17.7 111 SOUTH PASS 9040 7.2 13.0 55 9.4 13.9 68 WINDY PEAK 7900 6.3 5.4 117 6.7 7.8 86 ----- ----- Basin wide percent of average 85 91 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 13.3 8.8 151 13.9 11.2 124 DIVIDE PEAK 8880 17.7 14.4 123 19.3 15.5 125 OLD BATTLE 10000 25.2 23.6 107 30.1 25.8 117 SANDSTONE RS 8150 13.8 11.3 122 16.2 14.3 113 WHISKEY PARK 8950 25.0 21.6 116 25.9 21.6 120 ----- ----- Basin wide percent of average 119 119 UPPER GREEN RIVER BIG SANDY OPENING 9080 8.6 11.0 78 8.6 10.3 83 BLIND BULL SUM 8650 18.2 21.0 87 15.3 17.5 87 EAST RIM DIVIDE 7930 7.0 10.0 70 9.6 9.3 103 ELKHART PARK G.S. 9400 9.8 10.1 97 10.9 10.0 109 GROS VENTRE SUMMIT 8750 8.8 10.6 83 10.6 9.8 108 GUNSIGHT PASS 9820 10.5 -M * 11.5 -M * KENDALL R.S. 7740 8.4 11.3 74 10.6 11.3 94 LOOMIS PARK 8240 12.3 13.1 94 14.7 13.5 109 NEW FORK LAKE 8340 9.1 8.8 103 8.7 8.9 98 SNIDER BASIN 8060 10.2 11.4 89 10.9 12.6 87 SPRING CREEK DIVIDE 9000 19.1 20.2 95 19.6 20.7 95 TRIPLE PEAK 8500 17.7 19.1 93 19.5 18.7 104 ----- ----- Basin wide percent of average 88 97 LOWER GREEN RIVER HAMS FORK 7840 7.8 9.9 79 8.1 9.5 85 HEWINTA 9519 6.3 8.1 78 9.0 10.6 85 HICKERSON PARK 9145 2.5 5.3 47 5.1 5.7 89 HOLE-IN-ROCK 9150 2.9 5.1 57 5.1 5.3 96 INDIAN CREEK 9425 16.2 20.2 80 15.3 19.3 79 KELLEY R.S. 8180 10.6 12.6 84 12.3 15.8 78 STEEL CREEK PARK 10200 8.0 11.3 71 11.2 11.7 96 ----- ----- Basin wide percent of average 75 85 UPPER BEAR RIVER BUG LAKE 7950 13.1 15.5 85 12.7 14.7 86 HAYDEN FORK 9212 12.7 11.7 109 15.5 15.6 99 KELLEY R.S. 8180 10.6 12.6 84 12.3 15.8 78 LILY LAKE 9156 10.1 9.8 103 11.8 13.0 91 MONTE CRISTO 8960 19.0 22.1 86 19.3 19.2 101 SALT RIVER SUMMIT 7760 9.9 11.1 89 11.4 14.5 79 TRIAL LAKE 9992 17.7 18.6 95 17.2 18.5 93 ----- ----- Basin wide percent of average 92 90 ----------------------------------------------------------------------------- -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.