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 29 , 2012 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 18.0 15.9 113 21.2 18.5 115 COTTONWOOD CREEK 7670 17.0 18.3 93 22.0 22.9 96 EAST RIM DIVIDE 7930 10.0 11.0 91 10.4 10.2 102 GRAND TARGHEE 9260 29.7 -M * 24.3 -M * GRANITE CREEK 6770 14.5 16.0 91 14.9 17.3 86 GRASSY LAKE 7265 27.2 29.3 93 30.8 30.8 100 GROS VENTRE SUMMIT 8750 8.3 11.4 73 8.7 10.7 81 GUNSIGHT PASS 9820 10.5 -M * 11.2 -M * LEWIS LAKE DIVIDE 7850 25.5 29.4 87 29.1 31.3 93 PHILLIPS BENCH 8200 20.0 23.7 84 21.6 24.5 88 SALT RIVER SUMMIT 7760 9.7 12.1 80 10.4 15.7 66 SNAKE RIVER STATION 6920 16.4 16.4 100 21.4 19.4 110 SPRING CREEK DIVIDE 9000 20.2 22.0 92 20.2 22.3 91 THUMB DIVIDE 7980 12.7 15.2 84 13.8 15.9 87 TOGWOTEE PASS 9580 18.5 20.6 90 20.2 20.5 99 TWO OCEAN PLATEAU 9240 27.9 23.2 120 -M 23.2 * WILLOW CREEK 8380 22.3 25.2 88 27.4 26.8 102 ----- ----- Basin wide percent of average 93 95 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 20.6 19.7 105 20.0 17.0 118 BLACK BEAR 8170 28.3 32.9 86 28.9 33.1 87 CANYON 7870 10.4 11.3 92 11.9 12.9 92 FISHER CREEK 9100 28.0 29.6 95 27.3 30.4 90 MADISON PLATEAU 7750 17.3 20.8 83 21.1 21.9 96 NORTHEAST ENTRANCE 7350 9.2 9.7 95 10.7 10.7 100 PARKER PEAK 9400 19.0 18.1 105 18.7 13.6 138 SYLVAN LAKE 8420 15.4 18.7 82 20.4 17.8 115 THUMB DIVIDE 7980 12.7 15.2 84 13.8 15.9 87 TWO OCEAN PLATEAU 9240 27.9 23.2 120 -M 23.2 * WHISKEY CREEK 6800 12.2 14.4 85 15.3 17.3 88 WHITE MILL 8700 18.4 20.3 91 19.2 22.6 85 WOLVERINE 7650 11.9 10.6 112 11.2 11.1 101 ----- ----- Basin wide percent of average 95 97 WIND RIVER BURROUGHS CREEK 8750 12.8 12.6 102 13.0 13.6 96 CASTLE CREEK 8400 7.0 -M * 7.8 -M * COLD SPRINGS 9630 7.4 7.2 103 8.3 8.4 99 DEER PARK 9700 10.2 14.4 71 15.3 17.7 86 HOBBS PARK 10100 12.8 11.9 108 11.8 9.8 120 LITTLE WARM 9370 7.2 9.5 76 9.3 10.8 86 SOUTH PASS 9040 12.5 14.0 89 12.1 14.9 81 ST. LAWRENCE ALT 8620 4.7 5.9 80 6.9 7.0 99 TOGWOTEE PASS 9580 18.5 20.6 90 20.2 20.5 99 TOWNSEND CREEK 8700 8.0 6.9 116 10.2 8.8 116 ----- ----- Basin wide percent of average 91 96 BIGHORN BASIN BALD MTN. 9380 18.4 16.0 115 13.3 14.0 95 BEAR TRAP MEADOW 8200 7.7 4.3 179 7.7 6.4 120 BLACKWATER 9780 21.1 20.4 103 20.7 17.1 121 BONE SPRINGS DIV 9350 17.9 13.2 136 13.7 11.5 119 EVENING STAR 9200 24.2 25.0 97 26.2 21.7 121 GRAVE SPRINGS 8550 8.1 7.3 111 9.4 7.7 122 KIRWIN 9550 10.9 9.1 120 12.7 9.1 140 MARQUETTE 8760 8.3 -M * 10.9 7.4 147 MIDDLE POWDER 7760 9.8 9.0 109 9.6 9.6 100 OWL CREEK 8975 4.5 4.1 110 5.0 4.4 114 POWDER RIVER PASS 9480 11.1 8.7 128 12.9 9.9 130 SHELL CREEK 9580 16.0 11.8 136 14.1 10.8 131 SYLVAN LAKE 8420 15.4 18.7 82 20.4 17.8 115 SYLVAN ROAD 7120 11.9 11.4 104 15.5 15.5 100 TIMBER CREEK 7950 4.5 4.2 107 8.1 5.4 150 YOUNTS PEAK 8350 14.6 14.6 100 14.0 13.5 104 ----- ----- Basin wide percent of average 110 118 SHOSHONE RIVER BLACKWATER 9780 21.1 20.4 103 20.7 17.1 121 EVENING STAR 9200 24.2 25.0 97 26.2 21.7 121 KIRWIN 9550 10.9 9.1 120 12.7 9.1 140 MARQUETTE 8760 8.3 -M * 10.9 7.4 147 SYLVAN LAKE 8420 15.4 18.7 82 20.4 17.8 115 SYLVAN ROAD 7120 11.9 11.4 104 15.5 15.5 100 YOUNTS PEAK 8350 14.6 14.6 100 14.0 13.5 104 ----- ----- Basin wide percent of average 99 118 POWDER-TONGUE BEAR TRAP MEADOW 8200 7.7 4.3 179 7.7 6.4 120 BIG GOOSE 7990 9.0 7.6 118 12.6 6.8 185 BONE SPRINGS DIV 9350 17.9 13.2 136 13.7 11.5 119 BURGESS JUNCTION 7880 11.4 9.0 127 13.3 9.4 141 CLOUD PEAK RESERVOIR 9860 15.0 10.0 150 13.6 9.7 140 DOME LAKE 8880 13.0 9.5 137 13.5 10.2 132 GRAVE SPRINGS 8550 8.1 7.3 111 9.4 7.7 122 HANSEN SAWMILL 8360 5.8 5.2 112 7.7 6.3 122 LITTLE GOOSE 8870 10.2 -M * 14.7 -M * MIDDLE POWDER 7760 9.8 9.0 109 9.6 9.6 100 POWDER RIVER PASS 9480 11.1 8.7 128 12.9 9.9 130 SOLDIER PARK 8720 12.3 -M * 9.1 -M * SUCKER CREEK 8880 13.4 9.1 147 13.8 10.4 133 TIE CREEK 6870 6.8 4.9 139 12.8 7.8 164 ----- ----- Basin wide percent of average 132 133 BELLE FOURCHE BLIND PARK 6890 8.3 7.1 117 9.3 9.2 101 COLE CANYON 5910 6.5 5.6 116 7.8 5.5 142 NORTH RAPID CREEK 6130 7.6 6.7 113 7.4 7.4 100 ----- ----- Basin wide percent of average 115 111 UPPER N. PLATTE RIVER BLACKHALL MTN 9820 20.2 -M * 21.7 -M * CINNABAR PARK 9574 15.2 .0 * 18.7 17.1 109 COLUMBINE 9160 17.7 21.7 82 18.2 20.7 88 DIVIDE PEAK 8880 13.1 15.5 85 17.0 16.9 101 ELK RIVER 8700 13.6 16.0 85 13.8 16.0 86 JOE WRIGHT 10120 12.5 17.1 73 17.3 20.0 86 NORTH FRENCH CREEK 10130 18.2 22.5 81 18.0 20.1 90 OLD BATTLE 10000 20.3 26.1 78 23.6 28.2 84 SAGE CREEK BASIN 7850 13.2 9.0 147 9.6 9.8 98 SOUTH BRUSH CREEK 8440 7.6 9.9 77 10.5 13.2 80 TOWER 10500 26.8 37.3 72 27.2 31.7 86 WEBBER SPRINGS 9250 15.6 21.1 74 19.2 21.9 88 WILLOW CREEK PASS 9540 -M 9.5 * 8.6 10.3 83 ----- ----- Basin wide percent of average 89 89 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 16.4 18.9 87 17.6 17.4 101 CASPER MTN. 7900 17.5 11.2 156 17.1 11.0 155 DEADMAN HILL 10220 15.5 12.9 120 14.5 13.2 110 DEER PARK 9700 10.2 14.4 71 15.3 17.7 86 LAPRELE CREEK 8375 8.8 8.9 99 11.3 10.0 113 RENO HILL 8400 14.9 10.3 145 16.4 11.4 144 ROACH 9700 12.1 13.8 88 15.1 14.7 103 SAND LAKE 10050 21.7 25.0 87 21.3 19.2 111 SOUTH PASS 9040 12.5 14.0 89 12.1 14.9 81 WINDY PEAK 7900 6.8 6.0 113 8.6 8.4 102 ----- ----- Basin wide percent of average 101 108 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 10.5 9.6 109 10.5 12.2 86 DIVIDE PEAK 8880 13.1 15.5 85 17.0 16.9 101 OLD BATTLE 10000 20.3 26.1 78 23.6 28.2 84 SANDSTONE RS 8150 10.2 12.4 82 11.1 15.5 72 WHISKEY PARK 8950 18.8 23.6 80 21.9 23.3 94 ----- ----- Basin wide percent of average 84 88 UPPER GREEN RIVER BIG SANDY OPENING 9080 11.6 12.0 97 11.7 11.3 104 BLIND BULL SUM 8650 19.6 22.9 86 15.5 18.9 82 EAST RIM DIVIDE 7930 10.0 11.0 91 10.4 10.2 102 ELKHART PARK G.S. 9400 11.5 11.0 105 12.5 10.9 115 GROS VENTRE SUMMIT 8750 8.3 11.4 73 8.7 10.7 81 GUNSIGHT PASS 9820 10.5 -M * 11.2 -M * KENDALL R.S. 7740 13.4 12.3 109 14.1 12.4 114 LOOMIS PARK 8240 12.6 14.4 88 14.6 14.7 99 NEW FORK LAKE 8340 10.2 9.6 106 9.5 9.6 99 POCKET CREEK 9360 9.1 -M * 11.0 -M * SNIDER BASIN 8060 11.6 12.4 94 11.7 13.6 86 SPRING CREEK DIVIDE 9000 20.2 22.0 92 20.2 22.3 91 TRIPLE PEAK 8500 20.2 20.7 98 22.7 20.6 110 ----- ----- Basin wide percent of average 93 98 LOWER GREEN RIVER HAMS FORK 7840 9.1 10.9 83 8.3 10.3 81 HEWINTA 9519 7.5 9.0 83 10.5 11.5 91 HICKERSON PARK 9145 7.9 5.8 136 10.3 6.2 166 HOLE-IN-ROCK 9150 7.0 5.7 123 10.3 5.7 181 INDIAN CREEK 9425 17.2 22.1 78 15.5 21.0 74 KELLEY R.S. 8180 11.5 13.9 83 13.5 17.1 79 STEEL CREEK PARK 10200 5.3 12.5 42 12.0 12.8 94 ----- ----- Basin wide percent of average 82 95 UPPER BEAR RIVER BUG LAKE 7950 12.2 17.0 72 13.3 16.0 83 HAYDEN FORK 9212 9.9 13.0 76 14.6 17.0 86 KELLEY R.S. 8180 11.5 13.9 83 13.5 17.1 79 LILY LAKE 9156 8.2 10.7 77 10.0 14.2 70 MONTE CRISTO 8960 15.6 24.5 64 15.7 21.0 75 SALT RIVER SUMMIT 7760 9.7 12.1 80 10.4 15.7 66 TRIAL LAKE 9992 11.5 20.5 56 11.6 20.4 57 ----- ----- Basin wide percent of average 70 73 ----------------------------------------------------------------------------- -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 1971-2000. 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.