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 26 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 14.2 18.0 79 17.8 21.0 85 COTTONWOOD CREEK 7670 25.1 23.3 108 28.4 26.7 106 GRAND TARGHEE 9260 39.8 -M * 31.6 -M * GRANITE CREEK 6770 15.4 18.6 83 19.6 19.6 100 GRASSY LAKE 7265 30.4 34.9 87 32.6 35.3 92 GROS VENTRE SUMMIT 8750 11.7 13.9 84 14.6 12.6 116 GUNSIGHT PASS 9820 13.9 -M * 14.8 -M * LEWIS LAKE DIVIDE 7850 -M 34.8 * -M 36.0 * PHILLIPS BENCH 8200 25.3 28.2 90 27.0 28.4 95 SALT RIVER SUMMIT 7760 13.7 14.1 97 14.9 18.2 82 SNAKE RIVER STATION 6920 15.9 19.0 84 20.7 21.9 95 SPRING CREEK DIVIDE 9000 25.2 25.9 97 24.6 25.8 95 THUMB DIVIDE 7980 17.9 18.7 96 18.9 18.4 103 TOGWOTEE PASS 9580 25.5 24.2 105 27.6 23.9 115 TWO OCEAN PLATEAU 9240 35.9 27.2 132 27.7 27.0 103 WILLOW CREEK 8380 32.1 29.7 108 36.7 31.3 117 ----- ----- Basin wide percent of average 97 100 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 21.9 22.9 96 19.9 19.6 102 BLACK BEAR 8170 32.8 38.3 86 32.9 39.4 84 CANYON 7870 12.4 13.4 93 13.6 15.1 90 FISHER CREEK 9100 35.0 34.0 103 33.5 35.5 94 MADISON PLATEAU 7750 20.0 24.4 82 21.8 26.0 84 NORTHEAST ENTRANCE 7350 10.3 11.1 93 12.8 12.3 104 PARKER PEAK 9400 24.9 21.0 119 -M 15.8 * SYLVAN LAKE 8420 18.9 21.9 86 21.1 20.4 103 THUMB DIVIDE 7980 17.9 18.7 96 18.9 18.4 103 TWO OCEAN PLATEAU 9240 35.9 27.2 132 27.7 27.0 103 WHISKEY CREEK 6800 14.5 16.7 87 18.1 20.4 89 WHITE MILL 8700 23.1 23.6 98 22.2 26.3 84 WOLVERINE 7650 10.9 11.5 95 11.0 12.5 88 ----- ----- Basin wide percent of average 98 93 WIND RIVER BURROUGHS CREEK 8750 14.6 14.3 102 15.3 15.8 97 COLD SPRINGS 9630 7.1 8.5 84 9.3 10.0 93 DEER PARK 9700 9.6 16.5 58 14.3 21.1 68 HOBBS PARK 10100 10.9 14.1 77 11.1 12.1 92 LITTLE WARM 9370 11.0 11.4 96 13.7 12.8 107 SOUTH PASS 9040 10.4 16.2 64 12.7 17.7 72 ST. LAWRENCE ALT 8620 4.4 6.9 64 7.7 8.4 92 TOGWOTEE PASS 9580 25.5 24.2 105 27.6 23.9 115 TOWNSEND CREEK 8700 6.9 8.2 84 8.9 10.9 82 ----- ----- Basin wide percent of average 83 91 BIGHORN BASIN BALD MTN. 9380 17.3 18.9 92 14.4 16.7 86 BEAR TRAP MEADOW 8200 8.7 5.3 164 9.1 7.8 117 BLACKWATER 9780 23.4 23.7 99 21.1 19.9 106 BONE SPRINGS DIV 9350 16.8 15.5 108 13.3 13.9 96 EVENING STAR 9200 28.3 28.9 98 29.3 24.6 119 GRAVE SPRINGS 8550 8.9 8.9 100 9.8 9.2 107 KIRWIN 9550 11.4 10.9 105 12.6 10.7 118 MARQUETTE 8760 4.7 8.4 56 7.1 9.1 78 MIDDLE POWDER 7760 10.7 11.2 96 9.4 11.7 80 OWL CREEK 8975 4.7 5.2 90 4.7 5.4 87 POWDER RIVER PASS 9480 12.1 10.4 116 13.8 11.8 117 SHELL CREEK 9580 15.8 14.1 112 15.0 12.7 118 SYLVAN LAKE 8420 18.9 21.9 86 21.1 20.4 103 SYLVAN ROAD 7120 13.4 12.5 107 17.8 17.3 103 TIMBER CREEK 7950 3.6 5.4 67 7.3 6.9 106 YOUNTS PEAK 8350 17.2 16.7 103 15.2 15.7 97 ----- ----- Basin wide percent of average 99 103 SHOSHONE RIVER BLACKWATER 9780 23.4 23.7 99 21.1 19.9 106 EVENING STAR 9200 28.3 28.9 98 29.3 24.6 119 KIRWIN 9550 11.4 10.9 105 12.6 10.7 118 MARQUETTE 8760 4.7 8.4 56 7.1 9.1 78 SYLVAN LAKE 8420 18.9 21.9 86 21.1 20.4 103 SYLVAN ROAD 7120 13.4 12.5 107 17.8 17.3 103 YOUNTS PEAK 8350 17.2 16.7 103 15.2 15.7 97 ----- ----- Basin wide percent of average 95 106 POWDER-TONGUE BEAR TRAP MEADOW 8200 8.7 5.3 164 9.1 7.8 117 BIG GOOSE 7990 8.2 9.8 84 10.5 8.0 131 BONE SPRINGS DIV 9350 16.8 15.5 108 13.3 13.9 96 BURGESS JUNCTION 7880 11.0 11.0 100 11.3 11.5 98 CLOUD PEAK RESERVOIR 9860 16.1 12.6 128 15.1 12.0 126 DOME LAKE 8880 11.4 11.7 97 13.7 12.4 110 GRAVE SPRINGS 8550 8.9 8.9 100 9.8 9.2 107 HANSEN SAWMILL 8360 6.2 6.3 98 9.0 7.7 117 MIDDLE POWDER 7760 10.7 11.2 96 9.4 11.7 80 POWDER RIVER PASS 9480 12.1 10.4 116 13.8 11.8 117 SUCKER CREEK 8880 12.6 11.1 114 14.6 12.8 114 TIE CREEK 6870 4.0 5.9 68 11.8 9.4 126 ----- ----- Basin wide percent of average 106 110 BELLE FOURCHE BLIND PARK 6890 6.9 8.7 79 14.1 10.7 132 COLE CANYON 5910 6.8 6.7 101 11.3 6.4 177 NORTH RAPID CREEK 6130 9.1 8.0 114 12.9 8.3 155 ----- ----- Basin wide percent of average 97 151 UPPER N. PLATTE RIVER COLUMBINE 9160 25.4 24.7 103 25.1 24.4 103 DIVIDE PEAK 8880 21.2 19.1 111 23.1 20.0 116 ELK RIVER 8700 20.6 18.9 109 20.2 18.9 107 JOE WRIGHT 10120 22.5 20.4 110 26.6 23.8 112 NORTH FRENCH CREEK 10130 32.9 27.9 118 30.2 23.8 127 OLD BATTLE 10000 31.1 31.2 100 35.8 33.5 107 SAGE CREEK BASIN 7850 10.2 11.1 92 13.4 11.6 116 SOUTH BRUSH CREEK 8440 12.1 12.7 95 16.1 15.6 103 TOWER 10500 41.4 43.9 94 39.5 37.1 106 WEBBER SPRINGS 9250 23.7 25.8 92 26.7 25.8 103 WILLOW CREEK PASS 9540 11.3 11.4 99 11.3 12.3 92 ----- ----- Basin wide percent of average 102 109 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 21.7 22.7 96 19.9 21.1 94 CASPER MTN. 7900 11.2 13.6 82 12.7 13.5 94 DEADMAN HILL 10220 14.7 15.5 95 15.2 16.1 94 DEER PARK 9700 9.6 16.5 58 14.3 21.1 68 LAPRELE CREEK 8375 9.4 10.7 88 10.6 12.0 88 RENO HILL 8400 13.0 13.3 98 14.0 14.0 100 ROACH 9700 13.7 16.3 84 16.0 17.9 89 SAND LAKE 10050 28.0 31.2 90 26.2 23.1 113 SOUTH PASS 9040 10.4 16.2 64 12.7 17.7 72 WINDY PEAK 7900 8.4 7.8 108 9.0 10.1 89 ----- ----- Basin wide percent of average 86 90 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 14.9 11.5 130 17.1 15.1 113 DIVIDE PEAK 8880 21.2 19.1 111 23.1 20.0 116 OLD BATTLE 10000 31.1 31.2 100 35.8 33.5 107 SANDSTONE RS 8150 16.6 14.9 111 19.1 18.2 105 WHISKEY PARK 8950 30.9 29.4 105 31.3 27.7 113 ----- ----- Basin wide percent of average 108 110 UPPER GREEN RIVER BIG SANDY OPENING 9080 11.7 14.1 83 11.5 13.0 88 BLIND BULL SUM 8650 24.4 27.4 89 18.5 21.7 85 EAST RIM DIVIDE 7930 8.9 12.8 70 11.3 11.8 96 ELKHART PARK G.S. 9400 11.9 13.1 91 13.0 12.9 101 GROS VENTRE SUMMIT 8750 11.7 13.9 84 14.6 12.6 116 GUNSIGHT PASS 9820 13.9 -M * 14.8 -M * KENDALL R.S. 7740 10.7 14.6 73 12.9 14.3 90 LOOMIS PARK 8240 14.9 17.1 87 17.2 17.0 101 NEW FORK LAKE 8340 11.1 11.0 101 9.9 11.0 90 SNIDER BASIN 8060 13.3 14.3 93 13.7 15.7 87 SPRING CREEK DIVIDE 9000 25.2 25.9 97 24.6 25.8 95 TRIPLE PEAK 8500 23.3 24.5 95 24.8 24.1 103 ----- ----- Basin wide percent of average 89 96 LOWER GREEN RIVER HAMS FORK 7840 10.2 12.4 82 10.4 11.9 87 HEWINTA 9519 7.5 11.4 66 12.0 13.9 86 HICKERSON PARK 9145 3.3 7.1 46 6.7 7.5 89 HOLE-IN-ROCK 9150 4.1 6.8 60 6.8 7.0 97 INDIAN CREEK 9425 22.1 27.1 82 19.9 24.6 81 KELLEY R.S. 8180 14.8 16.6 89 16.2 19.8 82 STEEL CREEK PARK 10200 11.0 15.2 72 14.5 15.4 94 ----- ----- Basin wide percent of average 76 86 UPPER BEAR RIVER BUG LAKE 7950 -M 20.4 * -M 18.7 * HAYDEN FORK 9212 14.1 16.0 88 19.5 20.2 97 KELLEY R.S. 8180 14.8 16.6 89 16.2 19.8 82 LILY LAKE 9156 -M 12.7 * -M 16.8 * MONTE CRISTO 8960 -M 29.3 * -M 24.7 * SALT RIVER SUMMIT 7760 13.7 14.1 97 14.9 18.2 82 TRIAL LAKE 9992 -M 24.5 * -M 24.2 * ----- ----- Basin wide percent of average 91* 87* ----------------------------------------------------------------------------- -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.