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 29 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 14.7 18.1 81 18.3 21.3 86 COTTONWOOD CREEK 7670 25.5 23.8 107 28.8 27.1 106 GRAND TARGHEE 9260 40.6 -M * 32.0 -M * GRANITE CREEK 6770 15.7 18.7 84 19.8 19.8 100 GRASSY LAKE 7265 30.9 35.5 87 33.3 35.8 93 GROS VENTRE SUMMIT 8750 11.1 14.1 79 14.9 12.8 116 GUNSIGHT PASS 9820 14.2 -M * 15.0 -M * LEWIS LAKE DIVIDE 7850 -M 35.3 * -M 36.5 * PHILLIPS BENCH 8200 26.1 28.7 91 27.7 28.8 96 SALT RIVER SUMMIT 7760 14.0 14.4 97 15.3 18.6 82 SNAKE RIVER STATION 6920 16.3 19.1 85 21.2 22.1 96 SPRING CREEK DIVIDE 9000 25.7 26.4 97 24.9 26.2 95 THUMB DIVIDE 7980 18.4 19.0 97 19.3 18.7 103 TOGWOTEE PASS 9580 26.1 24.6 106 28.1 24.3 116 TWO OCEAN PLATEAU 9240 36.8 27.7 133 28.4 27.5 103 WILLOW CREEK 8380 32.5 30.1 108 37.1 31.9 116 ----- ----- Basin wide percent of average 98 101 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 22.7 23.2 98 20.5 19.9 103 BLACK BEAR 8170 34.5 39.0 88 33.9 40.0 85 CANYON 7870 12.9 13.7 94 14.2 15.3 93 FISHER CREEK 9100 35.6 34.7 103 -M 36.0 * MADISON PLATEAU 7750 21.1 25.0 84 22.7 26.4 86 NORTHEAST ENTRANCE 7350 10.8 11.3 96 13.1 12.5 105 PARKER PEAK 9400 25.5 21.5 119 -M 16.0 * SYLVAN LAKE 8420 19.6 22.4 88 21.6 20.7 104 THUMB DIVIDE 7980 18.4 19.0 97 19.3 18.7 103 TWO OCEAN PLATEAU 9240 36.8 27.7 133 28.4 27.5 103 WHISKEY CREEK 6800 15.2 17.1 89 18.6 20.8 89 WHITE MILL 8700 23.8 24.1 99 22.6 26.7 85 WOLVERINE 7650 11.5 11.5 100 11.7 12.7 92 ----- ----- Basin wide percent of average 99 94 WIND RIVER BURROUGHS CREEK 8750 15.1 14.6 103 15.5 16.0 97 COLD SPRINGS 9630 7.5 8.7 86 9.9 10.3 96 DEER PARK 9700 10.1 16.6 61 14.9 21.5 69 HOBBS PARK 10100 11.6 14.6 79 11.7 12.4 94 LITTLE WARM 9370 11.7 11.7 100 14.2 13.1 108 SOUTH PASS 9040 11.2 16.4 68 13.0 18.1 72 ST. LAWRENCE ALT 8620 5.1 7.1 72 8.2 8.6 95 TOGWOTEE PASS 9580 26.1 24.6 106 28.1 24.3 116 TOWNSEND CREEK 8700 7.7 8.5 91 10.1 11.2 90 ----- ----- Basin wide percent of average 86 93 BIGHORN BASIN BALD MTN. 9380 17.4 19.3 90 14.0 17.0 82 BEAR TRAP MEADOW 8200 8.8 5.2 169 9.3 8.0 116 BLACKWATER 9780 24.0 24.3 99 21.7 20.2 107 BONE SPRINGS DIV 9350 16.9 15.9 106 13.6 14.2 96 EVENING STAR 9200 29.5 29.5 100 29.9 25.0 120 GRAVE SPRINGS 8550 9.1 9.1 100 9.8 9.4 104 KIRWIN 9550 11.8 11.1 106 13.1 11.0 119 MARQUETTE 8760 5.2 8.7 60 7.5 9.4 80 MIDDLE POWDER 7760 10.8 11.4 95 9.5 12.0 79 OWL CREEK 8975 5.2 5.4 96 5.0 5.6 89 POWDER RIVER PASS 9480 12.0 10.6 113 13.9 12.0 116 SHELL CREEK 9580 16.1 14.4 112 15.1 13.0 116 SYLVAN LAKE 8420 19.6 22.4 88 21.6 20.7 104 SYLVAN ROAD 7120 13.3 12.7 105 18.1 17.5 103 TIMBER CREEK 7950 3.9 5.5 71 7.3 7.1 103 YOUNTS PEAK 8350 17.8 17.0 105 15.2 15.9 96 ----- ----- Basin wide percent of average 100 103 SHOSHONE RIVER BLACKWATER 9780 24.0 24.3 99 21.7 20.2 107 EVENING STAR 9200 29.5 29.5 100 29.9 25.0 120 KIRWIN 9550 11.8 11.1 106 13.1 11.0 119 MARQUETTE 8760 5.2 8.7 60 7.5 9.4 80 SYLVAN LAKE 8420 19.6 22.4 88 21.6 20.7 104 SYLVAN ROAD 7120 13.3 12.7 105 18.1 17.5 103 YOUNTS PEAK 8350 17.8 17.0 105 15.2 15.9 96 ----- ----- Basin wide percent of average 96 106 POWDER-TONGUE BEAR TRAP MEADOW 8200 8.8 5.2 169 9.3 8.0 116 BIG GOOSE 7990 8.5 10.1 84 10.6 8.2 129 BONE SPRINGS DIV 9350 16.9 15.9 106 13.6 14.2 96 BURGESS JUNCTION 7880 11.2 11.4 98 11.5 11.8 97 CLOUD PEAK RESERVOIR 9860 16.2 12.9 126 15.3 12.4 123 DOME LAKE 8880 11.7 12.0 98 13.9 12.7 109 GRAVE SPRINGS 8550 9.1 9.1 100 9.8 9.4 104 HANSEN SAWMILL 8360 6.3 6.3 100 9.3 7.9 118 MIDDLE POWDER 7760 10.8 11.4 95 9.5 12.0 79 POWDER RIVER PASS 9480 12.0 10.6 113 13.9 12.0 116 SUCKER CREEK 8880 12.7 11.5 110 15.0 13.1 115 TIE CREEK 6870 4.3 5.7 75 12.0 9.6 125 ----- ----- Basin wide percent of average 105 109 BELLE FOURCHE BLIND PARK 6890 6.9 8.5 81 14.2 10.9 130 COLE CANYON 5910 6.7 6.7 100 11.7 6.5 180 NORTH RAPID CREEK 6130 9.2 8.1 114 12.9 8.4 154 ----- ----- Basin wide percent of average 98 150 UPPER N. PLATTE RIVER COLUMBINE 9160 25.8 24.9 104 25.7 24.8 104 DIVIDE PEAK 8880 22.6 19.5 116 24.2 20.4 119 ELK RIVER 8700 20.9 19.2 109 20.8 19.2 108 JOE WRIGHT 10120 23.0 20.9 110 27.1 24.2 112 NORTH FRENCH CREEK 10130 33.6 28.6 117 30.8 24.2 127 OLD BATTLE 10000 31.9 31.7 101 36.3 34.1 106 SAGE CREEK BASIN 7850 11.1 11.3 98 13.5 11.8 114 SOUTH BRUSH CREEK 8440 12.3 12.9 95 16.3 16.0 102 TOWER 10500 42.3 44.7 95 40.5 37.8 107 WEBBER SPRINGS 9250 24.2 26.1 93 27.3 26.2 104 WILLOW CREEK PASS 9540 11.7 11.7 100 11.7 12.5 94 ----- ----- Basin wide percent of average 103 109 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 22.4 23.2 97 20.7 21.5 96 CASPER MTN. 7900 11.9 14.0 85 13.0 13.9 94 DEADMAN HILL 10220 15.6 15.9 98 16.0 16.5 97 DEER PARK 9700 10.1 16.6 61 14.9 21.5 69 LAPRELE CREEK 8375 9.4 10.8 87 11.1 12.3 90 RENO HILL 8400 13.4 13.7 98 14.4 14.4 100 ROACH 9700 14.3 16.7 86 16.6 18.2 91 SAND LAKE 10050 28.8 31.9 90 27.0 23.5 115 SOUTH PASS 9040 11.2 16.4 68 13.0 18.1 72 WINDY PEAK 7900 8.7 7.9 110 9.5 10.3 92 ----- ----- Basin wide percent of average 87 92 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 15.5 11.4 136 17.4 15.5 112 DIVIDE PEAK 8880 22.6 19.5 116 24.2 20.4 119 OLD BATTLE 10000 31.9 31.7 101 36.3 34.1 106 SANDSTONE RS 8150 17.0 15.0 113 19.4 18.5 105 WHISKEY PARK 8950 31.6 29.9 106 31.8 28.2 113 ----- ----- Basin wide percent of average 110 111 UPPER GREEN RIVER BIG SANDY OPENING 9080 11.8 14.4 82 11.7 13.2 89 BLIND BULL SUM 8650 25.3 27.8 91 18.9 22.0 86 EAST RIM DIVIDE 7930 9.2 13.0 71 11.5 12.0 96 ELKHART PARK G.S. 9400 12.1 13.3 91 13.2 13.1 101 GROS VENTRE SUMMIT 8750 11.1 14.1 79 14.9 12.8 116 GUNSIGHT PASS 9820 14.2 -M * 15.0 -M * KENDALL R.S. 7740 10.9 14.6 75 13.2 14.5 91 LOOMIS PARK 8240 15.4 17.3 89 17.5 17.3 101 NEW FORK LAKE 8340 11.3 11.1 102 10.2 11.2 91 SNIDER BASIN 8060 13.5 14.5 93 14.0 16.0 88 SPRING CREEK DIVIDE 9000 25.7 26.4 97 24.9 26.2 95 TRIPLE PEAK 8500 23.8 24.8 96 25.2 24.5 103 ----- ----- Basin wide percent of average 89 96 LOWER GREEN RIVER HAMS FORK 7840 10.3 12.3 84 11.0 12.1 91 HEWINTA 9519 8.0 11.7 68 12.3 14.3 86 HICKERSON PARK 9145 3.4 7.3 47 7.2 7.7 94 HOLE-IN-ROCK 9150 4.3 7.0 61 7.1 7.2 99 INDIAN CREEK 9425 22.9 27.6 83 20.6 25.1 82 KELLEY R.S. 8180 15.2 16.8 90 16.8 20.1 84 STEEL CREEK PARK 10200 11.5 15.5 74 14.8 15.8 94 ----- ----- Basin wide percent of average 77 88 UPPER BEAR RIVER BUG LAKE 7950 17.7 20.8 85 16.9 19.0 89 HAYDEN FORK 9212 14.4 16.2 89 19.7 20.6 96 KELLEY R.S. 8180 15.2 16.8 90 16.8 20.1 84 LILY LAKE 9156 13.1 12.9 102 15.2 17.2 88 MONTE CRISTO 8960 25.1 29.7 85 24.8 25.2 98 SALT RIVER SUMMIT 7760 14.0 14.4 97 15.3 18.6 82 TRIAL LAKE 9992 22.3 24.8 90 20.8 24.6 85 ----- ----- Basin wide percent of average 90 89 ----------------------------------------------------------------------------- -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.