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 WEDNESDAY: APRIL 15 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 15.9 17.0 94 20.9 22.9 91 COTTONWOOD CREEK 7670 29.2 23.9 122 33.7 29.6 114 GRAND TARGHEE 9260 48.0 -M * 37.0 -M * GRANITE CREEK 6770 17.6 17.2 102 22.6 21.0 108 GRASSY LAKE 7265 34.1 37.1 92 36.9 38.4 96 GROS VENTRE SUMMIT 8750 -M 14.6 * 17.0 14.0 121 GUNSIGHT PASS 9820 16.3 -M * 17.5 -M * LEWIS LAKE DIVIDE 7850 33.8 36.7 92 36.0 39.2 92 PHILLIPS BENCH 8200 29.7 30.6 97 31.9 31.1 103 SALT RIVER SUMMIT 7760 15.8 14.5 109 17.8 20.2 88 SNAKE RIVER STATION 6920 18.3 17.7 103 24.1 23.9 101 SPRING CREEK DIVIDE 9000 30.1 28.4 106 28.8 28.4 101 THUMB DIVIDE 7980 22.0 18.8 117 23.3 20.4 114 TOGWOTEE PASS 9580 29.6 26.6 111 31.7 26.7 119 TWO OCEAN PLATEAU 9240 41.1 30.4 135 31.3 29.8 105 WILLOW CREEK 8380 37.7 31.8 119 41.8 34.7 120 ----- ----- Basin wide percent of average 107 105 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 25.2 25.4 99 22.9 21.7 106 BLACK BEAR 8170 38.2 40.9 93 37.9 43.2 88 CANYON 7870 15.0 14.0 107 16.2 16.5 98 FISHER CREEK 9100 38.9 37.0 105 37.8 39.0 97 MADISON PLATEAU 7750 24.3 26.2 93 25.9 28.8 90 NORTHEAST ENTRANCE 7350 11.3 10.8 105 15.0 13.6 110 PARKER PEAK 9400 29.6 23.3 127 20.4 17.7 115 SYLVAN LAKE 8420 22.4 24.2 93 25.4 22.6 112 THUMB DIVIDE 7980 22.0 18.8 117 23.3 20.4 114 TWO OCEAN PLATEAU 9240 41.1 30.4 135 31.3 29.8 105 WHISKEY CREEK 6800 17.9 17.8 101 21.3 22.5 95 WHITE MILL 8700 26.6 25.9 103 26.3 29.0 91 WOLVERINE 7650 12.3 11.1 111 13.4 13.8 97 ----- ----- Basin wide percent of average 106 100 WIND RIVER BURROUGHS CREEK 8750 16.9 15.1 112 17.4 17.6 99 COLD SPRINGS 9630 8.9 7.4 120 11.8 12.0 98 DEER PARK 9700 14.4 16.7 86 19.3 24.0 80 HOBBS PARK 10100 16.1 16.7 96 16.4 14.5 113 LITTLE WARM 9370 12.8 12.5 102 15.9 14.8 107 SOUTH PASS 9040 15.0 17.7 85 16.8 20.2 83 ST. LAWRENCE ALT 8620 7.5 7.4 101 11.1 10.1 110 TOGWOTEE PASS 9580 29.6 26.6 111 31.7 26.7 119 TOWNSEND CREEK 8700 11.1 9.8 113 14.0 13.3 105 ----- ----- Basin wide percent of average 102 101 BIGHORN BASIN BALD MTN. 9380 19.9 21.7 92 16.5 19.0 87 BEAR TRAP MEADOW 8200 8.2 4.7 174 10.3 9.3 111 BLACKWATER 9780 28.1 26.7 105 25.3 22.5 112 BONE SPRINGS DIV 9350 18.2 17.6 103 15.4 16.1 96 EVENING STAR 9200 32.2 31.9 101 33.6 27.4 123 GRAVE SPRINGS 8550 10.5 10.5 100 11.2 11.3 99 KIRWIN 9550 14.4 12.3 117 15.6 12.4 126 MARQUETTE 8760 8.2 10.4 79 10.2 11.3 90 MIDDLE POWDER 7760 12.5 13.9 90 11.2 13.7 82 OWL CREEK 8975 6.0 5.2 115 6.9 6.8 101 POWDER RIVER PASS 9480 13.5 11.8 114 16.0 13.7 117 SHELL CREEK 9580 17.8 16.0 111 16.8 14.7 114 SYLVAN LAKE 8420 22.4 24.2 93 25.4 22.6 112 SYLVAN ROAD 7120 14.7 12.3 120 21.0 18.9 111 TIMBER CREEK 7950 5.3 5.6 95 8.9 8.5 105 YOUNTS PEAK 8350 19.3 18.0 107 17.2 17.4 99 ----- ----- Basin wide percent of average 103 106 SHOSHONE RIVER BLACKWATER 9780 28.1 26.7 105 25.3 22.5 112 EVENING STAR 9200 32.2 31.9 101 33.6 27.4 123 KIRWIN 9550 14.4 12.3 117 15.6 12.4 126 MARQUETTE 8760 8.2 10.4 79 10.2 11.3 90 SYLVAN LAKE 8420 22.4 24.2 93 25.4 22.6 112 SYLVAN ROAD 7120 14.7 12.3 120 21.0 18.9 111 YOUNTS PEAK 8350 19.3 18.0 107 17.2 17.4 99 ----- ----- Basin wide percent of average 103 112 POWDER-TONGUE BEAR TRAP MEADOW 8200 8.2 4.7 174 10.3 9.3 111 BIG GOOSE 7990 12.0 12.3 98 14.7 10.4 141 BONE SPRINGS DIV 9350 18.2 17.6 103 15.4 16.1 96 BURGESS JUNCTION 7880 13.8 13.2 105 14.4 13.5 107 CLOUD PEAK RESERVOIR 9860 19.7 15.1 130 18.9 14.5 130 DOME LAKE 8880 14.5 13.9 104 17.2 14.6 118 GRAVE SPRINGS 8550 10.5 10.5 100 11.2 11.3 99 HANSEN SAWMILL 8360 7.4 6.1 121 11.2 9.3 120 MIDDLE POWDER 7760 12.5 13.9 90 11.2 13.7 82 POWDER RIVER PASS 9480 13.5 11.8 114 16.0 13.7 117 SUCKER CREEK 8880 16.5 13.4 123 18.9 15.1 125 TIE CREEK 6870 7.1 5.1 139 16.1 11.3 142 ----- ----- Basin wide percent of average 112 115 BELLE FOURCHE BLIND PARK 6890 5.4 7.7 70 15.6 12.2 128 COLE CANYON 5910 6.8 7.1 96 13.4 7.6 176 NORTH RAPID CREEK 6130 9.3 8.8 106 15.3 9.5 161 ----- ----- Basin wide percent of average 91 151 UPPER N. PLATTE RIVER COLUMBINE 9160 27.1 24.8 109 29.3 27.1 108 DIVIDE PEAK 8880 27.2 20.8 131 29.3 22.3 131 ELK RIVER 8700 23.5 19.8 119 23.9 21.1 113 JOE WRIGHT 10120 24.6 23.5 105 30.2 27.0 112 NORTH FRENCH CREEK 10130 37.4 32.4 115 34.7 26.7 130 OLD BATTLE 10000 38.6 34.5 112 43.1 37.0 116 SAGE CREEK BASIN 7850 15.1 12.1 125 16.6 12.9 129 SOUTH BRUSH CREEK 8440 13.8 13.3 104 19.2 18.0 107 TOWER 10500 47.9 49.3 97 44.9 41.4 108 WEBBER SPRINGS 9250 28.8 26.2 110 32.6 28.8 113 WILLOW CREEK PASS 9540 14.1 13.5 104 13.7 14.0 98 ----- ----- Basin wide percent of average 110 115 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 25.7 26.3 98 23.9 24.2 99 CASPER MTN. 7900 14.4 16.6 87 15.1 16.5 92 DEADMAN HILL 10220 18.5 18.2 102 18.8 18.6 101 DEER PARK 9700 14.4 16.7 86 19.3 24.0 80 LAPRELE CREEK 8375 9.5 10.4 91 14.3 14.1 101 RENO HILL 8400 17.2 15.8 109 18.8 17.1 110 ROACH 9700 17.5 18.4 95 20.2 20.3 100 SAND LAKE 10050 34.0 34.9 97 32.0 26.4 121 SOUTH PASS 9040 15.0 17.7 85 16.8 20.2 83 WINDY PEAK 7900 9.4 8.1 116 11.6 11.7 99 ----- ----- Basin wide percent of average 96 99 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 17.3 8.9 194 20.0 17.1 117 DIVIDE PEAK 8880 27.2 20.8 131 29.3 22.3 131 OLD BATTLE 10000 38.6 34.5 112 43.1 37.0 116 SANDSTONE RS 8150 21.6 13.6 159 22.6 20.0 113 WHISKEY PARK 8950 35.6 30.7 116 37.3 30.9 121 ----- ----- Basin wide percent of average 129 120 UPPER GREEN RIVER BIG SANDY OPENING 9080 13.9 15.3 91 14.0 14.4 97 BLIND BULL SUM 8650 29.4 28.9 102 21.6 23.7 91 EAST RIM DIVIDE 7930 11.2 13.9 81 13.2 12.9 102 ELKHART PARK G.S. 9400 15.1 14.0 108 16.4 14.5 113 GROS VENTRE SUMMIT 8750 -M 14.6 * 17.0 14.0 121 GUNSIGHT PASS 9820 16.3 -M * 17.5 -M * KENDALL R.S. 7740 11.6 13.7 85 14.8 15.5 95 LOOMIS PARK 8240 17.6 17.2 102 20.0 18.6 108 NEW FORK LAKE 8340 12.9 11.4 113 11.9 12.2 98 SNIDER BASIN 8060 15.4 15.0 103 16.1 17.4 93 SPRING CREEK DIVIDE 9000 30.1 28.4 106 28.8 28.4 101 TRIPLE PEAK 8500 25.6 25.9 99 28.3 26.6 106 ----- ----- Basin wide percent of average 100 102 LOWER GREEN RIVER HAMS FORK 7840 12.7 10.2 125 13.5 13.3 102 HEWINTA 9519 13.3 12.4 107 15.4 16.1 96 HICKERSON PARK 9145 7.2 8.3 87 11.1 8.9 125 HOLE-IN-ROCK 9150 7.1 7.3 97 10.5 8.4 125 INDIAN CREEK 9425 27.3 29.6 92 24.6 27.5 89 KELLEY R.S. 8180 17.9 17.3 103 20.1 22.0 91 STEEL CREEK PARK 10200 15.2 17.2 88 18.4 18.2 101 ----- ----- Basin wide percent of average 98 99 UPPER BEAR RIVER BUG LAKE 7950 20.4 21.7 94 19.6 20.7 95 HAYDEN FORK 9212 18.8 16.6 113 24.4 22.9 107 KELLEY R.S. 8180 17.9 17.3 103 20.1 22.0 91 LILY LAKE 9156 17.2 14.5 119 18.9 19.2 98 MONTE CRISTO 8960 30.0 30.6 98 28.9 27.7 104 SALT RIVER SUMMIT 7760 15.8 14.5 109 17.8 20.2 88 TRIAL LAKE 9992 27.5 26.3 105 25.8 27.0 96 ----- ----- Basin wide percent of average 104 97 ----------------------------------------------------------------------------- -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.