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 MONDAY: MARCH 30 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 15.1 18.1 83 18.8 21.4 88 COTTONWOOD CREEK 7670 25.9 23.9 108 29.3 27.3 107 GRAND TARGHEE 9260 41.1 -M * 32.3 -M * GRANITE CREEK 6770 16.1 18.7 86 20.3 19.9 102 GRASSY LAKE 7265 31.4 35.7 88 33.6 35.9 94 GROS VENTRE SUMMIT 8750 11.5 14.2 81 15.4 12.8 120 GUNSIGHT PASS 9820 14.7 -M * 15.5 -M * LEWIS LAKE DIVIDE 7850 -M 35.4 * -M 36.7 * PHILLIPS BENCH 8200 26.8 28.8 93 28.2 29.0 97 SALT RIVER SUMMIT 7760 14.2 14.4 99 15.5 18.7 83 SNAKE RIVER STATION 6920 16.5 19.2 86 21.6 22.2 97 SPRING CREEK DIVIDE 9000 26.4 26.5 100 25.6 26.3 97 THUMB DIVIDE 7980 18.7 19.0 98 19.6 18.8 104 TOGWOTEE PASS 9580 26.6 24.8 107 28.8 24.5 118 TWO OCEAN PLATEAU 9240 37.2 27.9 133 29.0 27.6 105 WILLOW CREEK 8380 33.3 30.2 110 37.7 32.0 118 ----- ----- Basin wide percent of average 99 102 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 22.9 23.3 98 21.0 20.0 105 BLACK BEAR 8170 35.4 39.2 90 34.5 40.3 86 CANYON 7870 13.2 13.7 96 14.5 15.4 94 FISHER CREEK 9100 36.4 34.9 104 -M 36.2 * MADISON PLATEAU 7750 21.4 25.1 85 23.2 26.6 87 NORTHEAST ENTRANCE 7350 10.8 11.3 96 13.4 12.6 106 PARKER PEAK 9400 25.8 21.6 119 -M 16.1 * SYLVAN LAKE 8420 19.8 22.5 88 22.0 20.8 106 THUMB DIVIDE 7980 18.7 19.0 98 19.6 18.8 104 TWO OCEAN PLATEAU 9240 37.2 27.9 133 29.0 27.6 105 WHISKEY CREEK 6800 15.9 17.2 92 19.4 20.9 93 WHITE MILL 8700 24.4 24.2 101 22.8 26.9 85 WOLVERINE 7650 11.6 11.5 101 11.8 12.7 93 ----- ----- Basin wide percent of average 101 95 WIND RIVER BURROUGHS CREEK 8750 15.4 14.6 105 16.0 16.1 99 COLD SPRINGS 9630 7.6 8.8 86 10.1 10.4 97 DEER PARK 9700 10.3 16.8 61 15.1 21.6 70 HOBBS PARK 10100 12.2 14.7 83 12.2 12.5 98 LITTLE WARM 9370 11.9 11.8 101 14.6 13.2 111 SOUTH PASS 9040 11.3 16.6 68 13.3 18.2 73 ST. LAWRENCE ALT 8620 5.3 7.2 74 8.7 8.7 100 TOGWOTEE PASS 9580 26.6 24.8 107 28.8 24.5 118 TOWNSEND CREEK 8700 7.8 8.6 91 10.2 11.4 89 ----- ----- Basin wide percent of average 87 94 BIGHORN BASIN BALD MTN. 9380 18.3 19.5 94 14.4 17.1 84 BEAR TRAP MEADOW 8200 9.1 5.2 175 9.5 8.0 119 BLACKWATER 9780 24.6 24.4 101 22.2 20.4 109 BONE SPRINGS DIV 9350 17.4 16.0 109 13.9 14.4 97 EVENING STAR 9200 29.3 29.7 99 30.4 25.1 121 GRAVE SPRINGS 8550 9.1 9.2 99 9.9 9.5 104 KIRWIN 9550 12.5 11.2 112 13.7 11.1 123 MARQUETTE 8760 5.8 8.8 66 7.7 9.5 81 MIDDLE POWDER 7760 11.1 11.5 97 9.8 12.1 81 OWL CREEK 8975 5.2 5.5 95 5.4 5.7 95 POWDER RIVER PASS 9480 12.5 10.7 117 14.5 12.1 120 SHELL CREEK 9580 16.6 14.5 114 15.8 13.1 121 SYLVAN LAKE 8420 19.8 22.5 88 22.0 20.8 106 SYLVAN ROAD 7120 13.7 12.9 106 18.5 17.6 105 TIMBER CREEK 7950 4.4 5.7 77 8.0 7.2 111 YOUNTS PEAK 8350 17.7 17.1 104 15.2 16.0 95 ----- ----- Basin wide percent of average 101 105 SHOSHONE RIVER BLACKWATER 9780 24.6 24.4 101 22.2 20.4 109 EVENING STAR 9200 29.3 29.7 99 30.4 25.1 121 KIRWIN 9550 12.5 11.2 112 13.7 11.1 123 MARQUETTE 8760 5.8 8.8 66 7.7 9.5 81 SYLVAN LAKE 8420 19.8 22.5 88 22.0 20.8 106 SYLVAN ROAD 7120 13.7 12.9 106 18.5 17.6 105 YOUNTS PEAK 8350 17.7 17.1 104 15.2 16.0 95 ----- ----- Basin wide percent of average 97 108 POWDER-TONGUE BEAR TRAP MEADOW 8200 9.1 5.2 175 9.5 8.0 119 BIG GOOSE 7990 9.2 10.3 89 11.5 8.3 139 BONE SPRINGS DIV 9350 17.4 16.0 109 13.9 14.4 97 BURGESS JUNCTION 7880 11.7 11.5 102 12.0 11.9 101 CLOUD PEAK RESERVOIR 9860 16.9 13.0 130 15.6 12.5 125 DOME LAKE 8880 12.5 12.1 103 14.7 12.8 115 GRAVE SPRINGS 8550 9.1 9.2 99 9.9 9.5 104 HANSEN SAWMILL 8360 6.7 6.3 106 9.7 8.0 121 MIDDLE POWDER 7760 11.1 11.5 97 9.8 12.1 81 POWDER RIVER PASS 9480 12.5 10.7 117 14.5 12.1 120 SUCKER CREEK 8880 13.6 11.6 117 15.7 13.2 119 TIE CREEK 6870 4.9 5.7 86 12.6 9.6 131 ----- ----- Basin wide percent of average 109 113 BELLE FOURCHE BLIND PARK 6890 7.0 8.6 81 14.5 10.9 133 COLE CANYON 5910 6.6 6.7 99 11.7 6.6 177 NORTH RAPID CREEK 6130 9.2 8.1 114 13.4 8.5 158 ----- ----- Basin wide percent of average 97 152 UPPER N. PLATTE RIVER COLUMBINE 9160 26.0 24.9 104 26.1 24.9 105 DIVIDE PEAK 8880 23.0 19.7 117 24.5 20.5 120 ELK RIVER 8700 21.5 19.3 111 21.0 19.3 109 JOE WRIGHT 10120 23.2 21.0 110 27.2 24.4 111 NORTH FRENCH CREEK 10130 34.1 28.8 118 31.0 24.3 128 OLD BATTLE 10000 32.0 31.9 100 36.3 34.2 106 SAGE CREEK BASIN 7850 11.3 11.4 99 13.8 11.9 116 SOUTH BRUSH CREEK 8440 12.8 13.0 98 16.8 16.1 104 TOWER 10500 42.7 45.0 95 40.8 38.0 107 WEBBER SPRINGS 9250 24.4 26.2 93 27.6 26.4 105 WILLOW CREEK PASS 9540 12.0 11.8 102 11.9 12.6 94 ----- ----- Basin wide percent of average 104 110 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 22.5 23.4 96 20.9 21.7 96 CASPER MTN. 7900 11.7 14.2 82 12.9 14.0 92 DEADMAN HILL 10220 15.8 16.1 98 16.2 16.6 98 DEER PARK 9700 10.3 16.8 61 15.1 21.6 70 LAPRELE CREEK 8375 9.2 10.9 84 11.0 12.4 89 RENO HILL 8400 13.2 13.9 95 14.3 14.6 98 ROACH 9700 14.3 16.8 85 16.7 18.3 91 SAND LAKE 10050 29.2 32.1 91 27.4 23.7 116 SOUTH PASS 9040 11.3 16.6 68 13.3 18.2 73 WINDY PEAK 7900 8.6 8.0 108 9.4 10.3 91 ----- ----- Basin wide percent of average 87 92 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 16.1 11.3 142 17.8 15.6 114 DIVIDE PEAK 8880 23.0 19.7 117 24.5 20.5 120 OLD BATTLE 10000 32.0 31.9 100 36.3 34.2 106 SANDSTONE RS 8150 17.6 14.9 118 19.7 18.6 106 WHISKEY PARK 8950 32.2 30.1 107 32.2 28.4 113 ----- ----- Basin wide percent of average 112 111 UPPER GREEN RIVER BIG SANDY OPENING 9080 11.8 14.4 82 11.6 13.3 87 BLIND BULL SUM 8650 25.5 28.0 91 19.2 22.2 86 EAST RIM DIVIDE 7930 9.4 13.1 72 11.6 12.0 97 ELKHART PARK G.S. 9400 12.3 13.4 92 13.5 13.2 102 GROS VENTRE SUMMIT 8750 11.5 14.2 81 15.4 12.8 120 GUNSIGHT PASS 9820 14.7 -M * 15.5 -M * KENDALL R.S. 7740 11.3 14.6 77 13.4 14.5 92 LOOMIS PARK 8240 15.7 17.4 90 18.0 17.3 104 NEW FORK LAKE 8340 11.4 11.2 102 10.1 11.3 89 SNIDER BASIN 8060 13.9 14.6 95 14.2 16.1 88 SPRING CREEK DIVIDE 9000 26.4 26.5 100 25.6 26.3 97 TRIPLE PEAK 8500 23.9 24.9 96 25.4 24.7 103 ----- ----- Basin wide percent of average 90 97 LOWER GREEN RIVER HAMS FORK 7840 10.6 12.2 87 11.0 12.2 90 HEWINTA 9519 8.4 11.8 71 12.5 14.4 87 HICKERSON PARK 9145 3.8 7.4 51 7.0 7.8 90 HOLE-IN-ROCK 9150 4.4 7.0 63 7.1 7.3 97 INDIAN CREEK 9425 23.7 27.8 85 20.8 25.3 82 KELLEY R.S. 8180 15.5 16.9 92 17.0 20.2 84 STEEL CREEK PARK 10200 11.6 15.6 74 15.0 15.9 94 ----- ----- Basin wide percent of average 79 88 UPPER BEAR RIVER BUG LAKE 7950 18.1 20.9 87 17.2 19.1 90 HAYDEN FORK 9212 14.9 16.3 91 20.1 20.8 97 KELLEY R.S. 8180 15.5 16.9 92 17.0 20.2 84 LILY LAKE 9156 13.5 13.0 104 15.6 17.3 90 MONTE CRISTO 8960 26.0 29.8 87 25.1 25.3 99 SALT RIVER SUMMIT 7760 14.2 14.4 99 15.5 18.7 83 TRIAL LAKE 9992 22.4 25.0 90 20.9 24.8 84 ----- ----- Basin wide percent of average 91 90 ----------------------------------------------------------------------------- -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.