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 THURSDAY: MARCH 19 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 14.6 17.6 83 17.3 20.4 85 COTTONWOOD CREEK 7670 22.7 22.1 103 26.2 25.6 102 GRAND TARGHEE 9260 36.5 -M * 29.2 -M * GRANITE CREEK 6770 15.0 18.2 82 19.2 19.1 101 GRASSY LAKE 7265 29.1 33.5 87 31.4 34.1 92 GROS VENTRE SUMMIT 8750 10.7 13.2 81 12.9 12.1 107 GUNSIGHT PASS 9820 12.8 -M * 13.5 -M * LEWIS LAKE DIVIDE 7850 -M 33.4 * -M 34.9 * PHILLIPS BENCH 8200 23.5 27.0 87 25.3 27.4 92 SALT RIVER SUMMIT 7760 12.3 13.6 90 13.6 17.5 78 SNAKE RIVER STATION 6920 16.0 18.6 86 20.0 21.2 94 SPRING CREEK DIVIDE 9000 23.5 24.9 94 23.3 24.8 94 THUMB DIVIDE 7980 17.7 17.9 99 18.5 17.8 104 TOGWOTEE PASS 9580 24.3 23.2 105 26.4 23.0 115 TWO OCEAN PLATEAU 9240 34.0 26.1 130 26.4 26.1 101 WILLOW CREEK 8380 29.6 28.5 104 33.9 30.1 113 ----- ----- Basin wide percent of average 96 98 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 21.4 22.2 96 19.5 18.9 103 BLACK BEAR 8170 32.4 37.1 87 31.9 37.7 85 CANYON 7870 12.7 13.0 98 13.6 14.5 94 FISHER CREEK 9100 34.5 32.9 105 33.5 34.1 98 MADISON PLATEAU 7750 19.6 23.6 83 21.3 24.8 86 NORTHEAST ENTRANCE 7350 10.6 10.7 99 12.6 11.9 106 PARKER PEAK 9400 24.1 20.3 119 18.3 15.2 120 SYLVAN LAKE 8420 18.3 21.0 87 20.5 19.7 104 THUMB DIVIDE 7980 17.7 17.9 99 18.5 17.8 104 TWO OCEAN PLATEAU 9240 34.0 26.1 130 26.4 26.1 101 WHISKEY CREEK 6800 14.5 16.2 90 17.8 19.6 91 WHITE MILL 8700 22.7 22.8 100 22.4 25.3 89 WOLVERINE 7650 10.9 11.4 96 10.9 12.1 90 ----- ----- Basin wide percent of average 99 96 WIND RIVER BURROUGHS CREEK 8750 14.2 13.8 103 14.9 15.2 98 COLD SPRINGS 9630 6.2 8.3 75 8.2 9.5 86 DEER PARK 9700 8.6 15.5 55 13.4 20.2 66 HOBBS PARK 10100 9.2 13.4 69 9.4 11.3 83 LITTLE WARM 9370 9.7 10.8 90 12.3 12.2 101 SOUTH PASS 9040 9.4 15.7 60 11.3 16.9 67 ST. LAWRENCE ALT 8620 2.9 6.7 43 6.1 7.9 77 TOGWOTEE PASS 9580 24.3 23.2 105 26.4 23.0 115 TOWNSEND CREEK 8700 5.5 7.9 70 8.1 10.2 79 ----- ----- Basin wide percent of average 78 87 BIGHORN BASIN BALD MTN. 9380 16.4 18.0 91 13.6 15.9 86 BEAR TRAP MEADOW 8200 7.8 5.0 156 8.1 7.3 111 BLACKWATER 9780 22.3 22.8 98 20.2 19.1 106 BONE SPRINGS DIV 9350 16.7 14.8 113 13.1 13.2 99 EVENING STAR 9200 27.5 27.8 99 28.1 23.8 118 GRAVE SPRINGS 8550 7.4 8.4 88 8.3 8.9 93 KIRWIN 9550 10.6 10.4 102 11.9 10.2 117 MARQUETTE 8760 3.3 7.9 42 6.7 8.5 79 MIDDLE POWDER 7760 9.1 10.5 87 9.1 11.0 83 OWL CREEK 8975 4.3 4.9 88 4.5 5.1 88 POWDER RIVER PASS 9480 11.4 10.0 114 12.9 11.2 115 SHELL CREEK 9580 15.0 13.4 112 14.3 12.1 118 SYLVAN LAKE 8420 18.3 21.0 87 20.5 19.7 104 SYLVAN ROAD 7120 13.4 12.3 109 17.3 16.8 103 TIMBER CREEK 7950 3.1 5.1 61 7.1 6.4 111 YOUNTS PEAK 8350 16.9 16.1 105 14.9 15.1 99 ----- ----- Basin wide percent of average 98 103 SHOSHONE RIVER BLACKWATER 9780 22.3 22.8 98 20.2 19.1 106 EVENING STAR 9200 27.5 27.8 99 28.1 23.8 118 KIRWIN 9550 10.6 10.4 102 11.9 10.2 117 MARQUETTE 8760 3.3 7.9 42 6.7 8.5 79 SYLVAN LAKE 8420 18.3 21.0 87 20.5 19.7 104 SYLVAN ROAD 7120 13.4 12.3 109 17.3 16.8 103 YOUNTS PEAK 8350 16.9 16.1 105 14.9 15.1 99 ----- ----- Basin wide percent of average 95 106 POWDER-TONGUE BEAR TRAP MEADOW 8200 7.8 5.0 156 8.1 7.3 111 BIG GOOSE 7990 7.0 9.0 78 9.3 7.6 122 BONE SPRINGS DIV 9350 16.7 14.8 113 13.1 13.2 99 BURGESS JUNCTION 7880 10.0 10.3 97 10.6 10.8 98 CLOUD PEAK RESERVOIR 9860 14.7 11.8 125 14.0 11.3 124 DOME LAKE 8880 10.4 11.0 95 12.6 11.6 109 GRAVE SPRINGS 8550 7.4 8.4 88 8.3 8.9 93 HANSEN SAWMILL 8360 5.8 6.0 97 8.6 7.2 119 MIDDLE POWDER 7760 9.1 10.5 87 9.1 11.0 83 POWDER RIVER PASS 9480 11.4 10.0 114 12.9 11.2 115 SUCKER CREEK 8880 11.8 10.4 113 14.1 12.0 118 TIE CREEK 6870 4.3 6.0 72 11.1 8.9 125 ----- ----- Basin wide percent of average 103 109 BELLE FOURCHE BLIND PARK 6890 7.8 8.4 93 13.3 10.3 129 COLE CANYON 5910 5.6 6.3 89 10.4 6.1 170 NORTH RAPID CREEK 6130 8.3 7.6 109 11.9 8.1 147 ----- ----- Basin wide percent of average 97 145 UPPER N. PLATTE RIVER COLUMBINE 9160 25.3 24.1 105 23.5 23.4 100 DIVIDE PEAK 8880 19.6 18.1 108 21.4 19.2 111 ELK RIVER 8700 22.3 18.1 123 19.5 18.1 108 JOE WRIGHT 10120 19.8 19.4 102 24.2 22.7 107 NORTH FRENCH CREEK 10130 30.2 26.2 115 27.9 22.7 123 OLD BATTLE 10000 28.5 29.8 96 33.9 32.1 106 SAGE CREEK BASIN 7850 10.5 10.5 100 12.4 11.1 112 SOUTH BRUSH CREEK 8440 10.9 12.0 91 13.7 14.9 92 TOWER 10500 38.5 42.0 92 37.7 35.6 106 WEBBER SPRINGS 9250 21.5 24.8 87 25.1 24.7 102 WILLOW CREEK PASS 9540 10.9 10.9 100 10.5 11.7 90 ----- ----- Basin wide percent of average 101 106 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 19.7 21.5 92 18.4 20.0 92 CASPER MTN. 7900 8.5 12.8 66 10.6 12.7 83 DEADMAN HILL 10220 14.1 14.7 96 14.5 15.3 95 DEER PARK 9700 8.6 15.5 55 13.4 20.2 66 LAPRELE CREEK 8375 7.9 10.2 77 8.9 11.4 78 RENO HILL 8400 9.0 12.4 73 10.5 13.2 80 ROACH 9700 13.6 15.6 87 15.7 17.0 92 SAND LAKE 10050 25.3 29.4 86 23.7 21.9 108 SOUTH PASS 9040 9.4 15.7 60 11.3 16.9 67 WINDY PEAK 7900 6.8 7.4 92 7.8 9.6 81 ----- ----- Basin wide percent of average 79 85 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 15.7 11.4 138 15.6 14.3 109 DIVIDE PEAK 8880 19.6 18.1 108 21.4 19.2 111 OLD BATTLE 10000 28.5 29.8 96 33.9 32.1 106 SANDSTONE RS 8150 14.9 14.5 103 17.5 17.5 100 WHISKEY PARK 8950 29.7 28.0 106 29.2 26.4 111 ----- ----- Basin wide percent of average 106 107 UPPER GREEN RIVER BIG SANDY OPENING 9080 10.9 13.6 80 10.8 12.6 86 BLIND BULL SUM 8650 22.6 26.3 86 17.8 20.9 85 EAST RIM DIVIDE 7930 8.8 12.4 71 11.0 11.4 96 ELKHART PARK G.S. 9400 11.3 12.5 90 12.3 12.3 100 GROS VENTRE SUMMIT 8750 10.7 13.2 81 12.9 12.1 107 GUNSIGHT PASS 9820 12.8 -M * 13.5 -M * KENDALL R.S. 7740 10.3 14.2 73 12.2 13.9 88 LOOMIS PARK 8240 15.0 16.5 91 16.8 16.4 102 NEW FORK LAKE 8340 10.4 10.6 98 9.7 10.6 92 SNIDER BASIN 8060 12.8 13.8 93 13.2 15.1 87 SPRING CREEK DIVIDE 9000 23.5 24.9 94 23.3 24.8 94 TRIPLE PEAK 8500 21.7 23.5 92 23.5 23.2 101 ----- ----- Basin wide percent of average 87 94 LOWER GREEN RIVER HAMS FORK 7840 9.8 12.4 79 10.0 11.5 87 HEWINTA 9519 6.7 10.7 63 10.2 13.3 77 HICKERSON PARK 9145 2.8 6.7 42 5.8 7.1 82 HOLE-IN-ROCK 9150 3.5 6.5 54 6.0 6.6 91 INDIAN CREEK 9425 20.5 25.7 80 18.4 23.6 78 KELLEY R.S. 8180 13.1 15.9 82 14.8 19.0 78 STEEL CREEK PARK 10200 9.3 14.5 64 12.5 14.6 86 ----- ----- Basin wide percent of average 71 81 UPPER BEAR RIVER BUG LAKE 7950 16.4 19.5 84 15.1 18.0 84 HAYDEN FORK 9212 13.4 15.2 88 17.1 19.3 89 KELLEY R.S. 8180 13.1 15.9 82 14.8 19.0 78 LILY LAKE 9156 11.6 12.1 96 13.2 16.0 82 MONTE CRISTO 8960 21.9 28.2 78 21.9 23.7 92 SALT RIVER SUMMIT 7760 12.3 13.6 90 13.6 17.5 78 TRIAL LAKE 9992 19.6 23.5 83 18.8 23.2 81 ----- ----- Basin wide percent of average 85 84 ----------------------------------------------------------------------------- -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.