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 SUNDAY: MARCH 1 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 12.7 15.9 80 15.6 18.5 84 COTTONWOOD CREEK 7670 21.9 18.3 120 25.2 22.9 110 GRAND TARGHEE 9260 32.5 -M * 26.9 -M * GRANITE CREEK 6770 14.0 16.0 88 18.3 17.3 106 GRASSY LAKE 7265 24.7 29.3 84 27.5 30.8 89 GROS VENTRE SUMMIT 8750 9.7 11.4 85 11.6 10.7 108 GUNSIGHT PASS 9820 11.7 -M * 12.5 -M * LEWIS LAKE DIVIDE 7850 21.1 29.4 72 24.5 31.3 78 PHILLIPS BENCH 8200 20.8 23.7 88 22.8 24.5 93 SALT RIVER SUMMIT 7760 11.6 12.1 96 12.9 15.7 82 SNAKE RIVER STATION 6920 13.4 16.4 82 17.3 19.4 89 SPRING CREEK DIVIDE 9000 22.0 22.0 100 22.0 22.3 99 THUMB DIVIDE 7980 12.9 15.2 85 14.4 15.9 91 TOGWOTEE PASS 9580 22.4 20.6 109 24.4 20.5 119 TWO OCEAN PLATEAU 9240 27.3 23.2 118 21.3 23.2 92 WILLOW CREEK 8380 27.7 25.2 110 31.9 26.8 119 ----- ----- Basin wide percent of average 94 97 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 17.8 19.7 90 16.4 17.0 96 BLACK BEAR 8170 26.7 32.9 81 27.1 33.1 82 CANYON 7870 10.4 11.3 92 11.3 12.9 88 FISHER CREEK 9100 28.9 29.6 98 27.5 30.4 90 MADISON PLATEAU 7750 15.4 20.8 74 17.3 21.9 79 NORTHEAST ENTRANCE 7350 8.5 9.7 88 10.8 10.7 101 PARKER PEAK 9400 19.9 18.1 110 -M 13.6 * SYLVAN LAKE 8420 14.8 18.7 79 17.1 17.8 96 THUMB DIVIDE 7980 12.9 15.2 85 14.4 15.9 91 TWO OCEAN PLATEAU 9240 27.3 23.2 118 21.3 23.2 92 WHISKEY CREEK 6800 11.1 14.4 77 14.4 17.3 83 WHITE MILL 8700 19.2 20.3 95 18.8 22.6 83 WOLVERINE 7650 9.7 10.6 92 9.3 11.1 84 ----- ----- Basin wide percent of average 91 88 WIND RIVER BURROUGHS CREEK 8750 13.0 12.6 103 13.7 13.6 101 COLD SPRINGS 9630 5.6 7.2 78 7.4 8.4 88 DEER PARK 9700 7.7 14.4 53 12.0 17.7 68 HOBBS PARK 10100 7.9 11.9 66 8.1 9.8 83 LITTLE WARM 9370 8.7 9.5 92 11.0 10.8 102 SOUTH PASS 9040 8.3 14.0 59 10.3 14.9 69 ST. LAWRENCE ALT 8620 2.2 5.9 37 5.2 7.0 74 TOGWOTEE PASS 9580 22.4 20.6 109 24.4 20.5 119 TOWNSEND CREEK 8700 4.6 6.9 67 6.9 8.8 78 ----- ----- Basin wide percent of average 78 89 BIGHORN BASIN BALD MTN. 9380 15.9 16.0 99 12.8 14.0 91 BEAR TRAP MEADOW 8200 7.4 4.3 172 7.7 6.4 120 BLACKWATER 9780 18.1 20.4 89 16.7 17.1 98 BONE SPRINGS DIV 9350 15.8 13.2 120 12.3 11.5 107 EVENING STAR 9200 23.5 25.0 94 24.5 21.7 113 GRAVE SPRINGS 8550 6.8 7.3 93 7.7 7.7 100 KIRWIN 9550 9.5 9.1 104 10.8 9.1 119 MARQUETTE 8760 3.2 6.9 46 6.0 7.4 81 MIDDLE POWDER 7760 8.7 9.0 97 7.9 9.6 82 OWL CREEK 8975 4.2 4.1 102 4.1 4.4 93 POWDER RIVER PASS 9480 10.9 8.7 125 12.3 9.9 124 SHELL CREEK 9580 14.3 11.8 121 13.8 10.8 128 SYLVAN LAKE 8420 14.8 18.7 79 17.1 17.8 96 SYLVAN ROAD 7120 11.7 11.4 103 14.7 15.5 95 TIMBER CREEK 7950 3.0 4.2 71 6.1 5.4 113 YOUNTS PEAK 8350 15.3 14.6 105 13.6 13.5 101 ----- ----- Basin wide percent of average 99 103 SHOSHONE RIVER BLACKWATER 9780 18.1 20.4 89 16.7 17.1 98 EVENING STAR 9200 23.5 25.0 94 24.5 21.7 113 KIRWIN 9550 9.5 9.1 104 10.8 9.1 119 MARQUETTE 8760 3.2 6.9 46 6.0 7.4 81 SYLVAN LAKE 8420 14.8 18.7 79 17.1 17.8 96 SYLVAN ROAD 7120 11.7 11.4 103 14.7 15.5 95 YOUNTS PEAK 8350 15.3 14.6 105 13.6 13.5 101 ----- ----- Basin wide percent of average 91 101 POWDER-TONGUE BEAR TRAP MEADOW 8200 7.4 4.3 172 7.7 6.4 120 BIG GOOSE 7990 6.7 7.6 88 8.9 6.8 131 BONE SPRINGS DIV 9350 15.8 13.2 120 12.3 11.5 107 BURGESS JUNCTION 7880 9.5 9.0 106 10.0 9.4 106 CLOUD PEAK RESERVOIR 9860 14.0 10.0 140 12.9 9.7 133 DOME LAKE 8880 9.8 9.5 103 11.9 10.1 118 GRAVE SPRINGS 8550 6.8 7.3 93 7.7 7.7 100 HANSEN SAWMILL 8360 5.3 5.2 102 8.0 6.3 127 MIDDLE POWDER 7760 8.7 9.0 97 7.9 9.6 82 POWDER RIVER PASS 9480 10.9 8.7 125 12.3 9.9 124 SUCKER CREEK 8880 11.3 9.1 124 13.3 10.4 128 TIE CREEK 6870 3.9 4.9 80 10.4 7.8 133 ----- ----- Basin wide percent of average 113 117 BELLE FOURCHE BLIND PARK 6890 8.1 7.1 114 12.7 9.2 138 COLE CANYON 5910 5.5 5.6 98 10.1 5.5 184 NORTH RAPID CREEK 6130 8.0 6.7 119 10.8 7.4 146 ----- ----- Basin wide percent of average 111 152 UPPER N. PLATTE RIVER COLUMBINE 9160 23.8 21.7 110 22.3 20.7 108 DIVIDE PEAK 8880 18.7 15.5 121 20.3 16.9 120 ELK RIVER 8700 20.3 16.0 127 18.5 16.0 116 JOE WRIGHT 10120 18.6 17.1 109 22.8 20.0 114 NORTH FRENCH CREEK 10130 28.3 22.5 126 26.6 20.1 132 OLD BATTLE 10000 27.0 26.1 103 32.0 28.2 113 SAGE CREEK BASIN 7850 10.3 9.0 114 11.8 9.8 120 SOUTH BRUSH CREEK 8440 11.3 9.9 114 12.6 13.2 95 TOWER 10500 37.1 37.3 99 34.5 31.7 109 WEBBER SPRINGS 9250 20.6 21.1 98 23.7 21.9 108 WILLOW CREEK PASS 9540 10.2 9.5 107 9.8 10.3 95 ----- ----- Basin wide percent of average 110 113 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 18.5 18.9 98 17.3 17.4 99 CASPER MTN. 7900 8.3 11.2 74 10.4 11.0 95 DEADMAN HILL 10220 13.0 12.9 101 13.5 13.2 102 DEER PARK 9700 7.7 14.4 53 12.0 17.7 68 LAPRELE CREEK 8375 7.6 8.9 85 8.3 10.0 83 RENO HILL 8400 9.0 10.3 87 10.1 11.4 89 ROACH 9700 13.2 13.8 96 15.1 14.7 103 SAND LAKE 10050 23.9 25.0 96 22.2 19.2 116 SOUTH PASS 9040 8.3 14.0 59 10.3 14.9 69 WINDY PEAK 7900 6.7 6.0 112 7.3 8.4 87 ----- ----- Basin wide percent of average 86 92 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 14.1 9.6 147 14.6 12.2 120 DIVIDE PEAK 8880 18.7 15.5 121 20.3 16.9 120 OLD BATTLE 10000 27.0 26.1 103 32.0 28.2 113 SANDSTONE RS 8150 14.6 12.4 118 16.8 15.5 108 WHISKEY PARK 8950 26.7 23.6 113 27.9 23.3 120 ----- ----- Basin wide percent of average 116 116 UPPER GREEN RIVER BIG SANDY OPENING 9080 9.8 12.0 82 9.7 11.3 86 BLIND BULL SUM 8650 20.5 22.9 90 16.7 18.9 88 EAST RIM DIVIDE 7930 8.1 11.0 74 10.5 10.2 103 ELKHART PARK G.S. 9400 10.8 11.0 98 11.8 10.9 108 GROS VENTRE SUMMIT 8750 9.7 11.4 85 11.6 10.7 108 GUNSIGHT PASS 9820 11.7 -M * 12.5 -M * KENDALL R.S. 7740 9.5 12.3 77 11.7 12.4 94 LOOMIS PARK 8240 14.0 14.4 97 16.2 14.7 110 NEW FORK LAKE 8340 9.8 9.6 102 9.1 9.6 95 SNIDER BASIN 8060 11.7 12.4 94 12.3 13.6 90 SPRING CREEK DIVIDE 9000 22.0 22.0 100 22.0 22.3 99 TRIPLE PEAK 8500 20.4 20.7 99 22.2 20.6 108 ----- ----- Basin wide percent of average 92 99 LOWER GREEN RIVER HAMS FORK 7840 9.0 10.9 83 9.2 10.3 89 HEWINTA 9519 6.5 9.0 72 9.6 11.5 83 HICKERSON PARK 9145 2.8 5.8 48 5.2 6.2 84 HOLE-IN-ROCK 9150 3.1 5.7 54 5.3 5.7 93 INDIAN CREEK 9425 18.8 22.1 85 17.4 21.0 83 KELLEY R.S. 8180 12.1 13.9 87 13.7 17.1 80 STEEL CREEK PARK 10200 8.6 12.5 69 11.9 12.8 93 ----- ----- Basin wide percent of average 76 85 UPPER BEAR RIVER BUG LAKE 7950 14.3 17.0 84 13.6 16.0 85 HAYDEN FORK 9212 13.1 13.0 101 16.0 17.0 94 KELLEY R.S. 8180 12.1 13.9 87 13.7 17.1 80 LILY LAKE 9156 10.5 10.7 98 12.3 14.2 87 MONTE CRISTO 8960 20.1 24.5 82 20.5 21.0 98 SALT RIVER SUMMIT 7760 11.6 12.1 96 12.9 15.7 82 TRIAL LAKE 9992 18.3 20.5 89 17.7 20.4 87 ----- ----- Basin wide percent of average 90 88 ----------------------------------------------------------------------------- -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.