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: APRIL 2 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 15.8 18.1 87 19.3 21.7 89 COTTONWOOD CREEK 7670 27.2 24.2 112 30.5 27.8 110 GRAND TARGHEE 9260 43.1 -M * 33.6 -M * GRANITE CREEK 6770 16.6 18.6 89 20.8 20.1 103 GRASSY LAKE 7265 31.8 36.1 88 34.1 36.4 94 GROS VENTRE SUMMIT 8750 -M 14.4 * 15.6 13.0 120 GUNSIGHT PASS 9820 15.0 -M * 15.9 -M * LEWIS LAKE DIVIDE 7850 30.4 35.8 85 32.6 37.2 88 PHILLIPS BENCH 8200 27.9 29.2 96 29.2 29.4 99 SALT RIVER SUMMIT 7760 15.0 14.6 103 16.2 19.0 85 SNAKE RIVER STATION 6920 16.9 19.2 88 21.9 22.5 97 SPRING CREEK DIVIDE 9000 27.3 26.9 101 26.3 26.8 98 THUMB DIVIDE 7980 19.5 19.2 102 20.2 19.1 106 TOGWOTEE PASS 9580 27.4 25.2 109 29.6 24.9 119 TWO OCEAN PLATEAU 9240 38.2 28.4 135 29.5 28.0 105 WILLOW CREEK 8380 34.6 30.6 113 38.9 32.6 119 ----- ----- Basin wide percent of average 101 102 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 23.4 23.6 99 21.3 20.3 105 BLACK BEAR 8170 36.5 39.8 92 35.2 40.9 86 CANYON 7870 13.6 13.9 98 14.8 15.6 95 FISHER CREEK 9100 37.0 35.4 105 35.9 36.8 98 MADISON PLATEAU 7750 22.5 25.5 88 24.1 27.1 89 NORTHEAST ENTRANCE 7350 11.2 11.3 99 13.7 12.8 107 PARKER PEAK 9400 26.4 21.9 121 19.8 16.4 121 SYLVAN LAKE 8420 20.7 22.8 91 22.7 21.1 108 THUMB DIVIDE 7980 19.5 19.2 102 20.2 19.1 106 TWO OCEAN PLATEAU 9240 38.2 28.4 135 29.5 28.0 105 WHISKEY CREEK 6800 16.6 17.4 95 20.0 21.2 94 WHITE MILL 8700 24.9 24.6 101 24.3 27.3 89 WOLVERINE 7650 12.0 11.6 103 12.3 12.9 95 ----- ----- Basin wide percent of average 102 98 WIND RIVER BURROUGHS CREEK 8750 15.7 14.8 106 16.3 16.4 99 COLD SPRINGS 9630 7.8 9.0 87 10.2 10.7 95 DEER PARK 9700 11.5 17.1 67 16.2 22.1 73 HOBBS PARK 10100 13.3 15.1 88 13.2 12.9 102 LITTLE WARM 9370 12.1 12.0 101 14.8 13.5 110 SOUTH PASS 9040 12.5 16.7 75 14.4 18.6 77 ST. LAWRENCE ALT 8620 5.9 7.4 80 9.3 8.9 104 TOGWOTEE PASS 9580 27.4 25.2 109 29.6 24.9 119 TOWNSEND CREEK 8700 8.9 8.8 101 11.4 11.7 97 ----- ----- Basin wide percent of average 91 97 BIGHORN BASIN BALD MTN. 9380 19.0 19.9 95 15.3 17.5 87 BEAR TRAP MEADOW 8200 9.4 5.2 181 9.9 8.3 119 BLACKWATER 9780 25.1 24.8 101 22.7 20.7 110 BONE SPRINGS DIV 9350 17.7 16.4 108 14.6 14.7 99 EVENING STAR 9200 30.3 30.1 101 31.1 25.5 122 GRAVE SPRINGS 8550 9.9 9.4 105 10.4 9.7 107 KIRWIN 9550 12.8 11.5 111 14.1 11.3 125 MARQUETTE 8760 6.6 9.0 73 8.5 9.8 87 MIDDLE POWDER 7760 12.1 11.8 103 10.5 12.4 85 OWL CREEK 8975 5.7 5.6 102 5.7 5.9 97 POWDER RIVER PASS 9480 12.8 10.9 117 14.8 12.4 119 SHELL CREEK 9580 17.0 14.9 114 16.1 13.4 120 SYLVAN LAKE 8420 20.7 22.8 91 22.7 21.1 108 SYLVAN ROAD 7120 14.2 12.9 110 19.0 17.8 107 TIMBER CREEK 7950 4.8 5.8 83 8.4 7.4 114 YOUNTS PEAK 8350 18.2 17.3 105 16.1 16.3 99 ----- ----- Basin wide percent of average 104 107 SHOSHONE RIVER BLACKWATER 9780 25.1 24.8 101 22.7 20.7 110 EVENING STAR 9200 30.3 30.1 101 31.1 25.5 122 KIRWIN 9550 12.8 11.5 111 14.1 11.3 125 MARQUETTE 8760 6.6 9.0 73 8.5 9.8 87 SYLVAN LAKE 8420 20.7 22.8 91 22.7 21.1 108 SYLVAN ROAD 7120 14.2 12.9 110 19.0 17.8 107 YOUNTS PEAK 8350 18.2 17.3 105 16.1 16.3 99 ----- ----- Basin wide percent of average 100 110 POWDER-TONGUE BEAR TRAP MEADOW 8200 9.4 5.2 181 9.9 8.3 119 BIG GOOSE 7990 10.2 10.7 95 12.4 8.5 146 BONE SPRINGS DIV 9350 17.7 16.4 108 14.6 14.7 99 BURGESS JUNCTION 7880 12.7 11.7 109 13.0 12.2 107 CLOUD PEAK RESERVOIR 9860 17.8 13.5 132 16.2 12.9 126 DOME LAKE 8880 13.3 12.6 106 15.5 13.2 117 GRAVE SPRINGS 8550 9.9 9.4 105 10.4 9.7 107 HANSEN SAWMILL 8360 6.9 6.5 106 9.9 8.2 121 MIDDLE POWDER 7760 12.1 11.8 103 10.5 12.4 85 POWDER RIVER PASS 9480 12.8 10.9 117 14.8 12.4 119 SUCKER CREEK 8880 14.8 11.8 125 16.9 13.6 124 TIE CREEK 6870 6.0 6.1 98 13.6 9.9 137 ----- ----- Basin wide percent of average 113 116 BELLE FOURCHE BLIND PARK 6890 7.2 8.7 83 14.8 11.1 133 COLE CANYON 5910 7.1 6.9 103 12.2 6.7 182 NORTH RAPID CREEK 6130 10.2 8.3 123 14.2 8.6 165 ----- ----- Basin wide percent of average 103 156 UPPER N. PLATTE RIVER COLUMBINE 9160 27.1 25.0 108 26.8 25.3 106 DIVIDE PEAK 8880 24.3 20.0 122 25.6 20.8 123 ELK RIVER 8700 22.6 19.6 115 22.0 19.7 112 JOE WRIGHT 10120 23.7 21.5 110 28.4 24.9 114 NORTH FRENCH CREEK 10130 35.1 29.5 119 32.1 24.8 129 OLD BATTLE 10000 33.4 32.4 103 38.7 34.8 111 SAGE CREEK BASIN 7850 12.2 11.6 105 14.5 12.1 120 SOUTH BRUSH CREEK 8440 13.2 13.2 100 17.2 16.4 105 TOWER 10500 45.3 45.8 99 43.1 38.6 112 WEBBER SPRINGS 9250 25.5 26.4 97 28.8 26.8 107 WILLOW CREEK PASS 9540 12.5 12.1 103 12.5 12.9 97 ----- ----- Basin wide percent of average 107 113 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 23.5 23.9 98 21.7 22.1 98 CASPER MTN. 7900 12.4 14.6 85 13.5 14.4 94 DEADMAN HILL 10220 16.4 16.4 100 16.8 17.0 99 DEER PARK 9700 11.5 17.1 67 16.2 22.1 73 LAPRELE CREEK 8375 9.4 11.0 85 11.9 12.6 94 RENO HILL 8400 14.5 14.3 101 15.5 15.0 103 ROACH 9700 14.8 17.2 86 17.3 18.7 93 SAND LAKE 10050 30.8 32.7 94 28.8 24.2 119 SOUTH PASS 9040 12.5 16.7 75 14.4 18.6 77 WINDY PEAK 7900 9.0 8.1 111 10.0 10.6 94 ----- ----- Basin wide percent of average 90 95 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 17.3 11.0 157 18.6 15.9 117 DIVIDE PEAK 8880 24.3 20.0 122 25.6 20.8 123 OLD BATTLE 10000 33.4 32.4 103 38.7 34.8 111 SANDSTONE RS 8150 19.1 14.8 129 20.7 18.8 110 WHISKEY PARK 8950 33.8 30.4 111 34.5 28.8 120 ----- ----- Basin wide percent of average 118 116 UPPER GREEN RIVER BIG SANDY OPENING 9080 12.3 14.7 84 12.1 13.5 90 BLIND BULL SUM 8650 26.8 28.3 95 19.8 22.5 88 EAST RIM DIVIDE 7930 9.9 13.3 74 11.9 12.2 98 ELKHART PARK G.S. 9400 12.7 13.6 93 13.8 13.4 103 GROS VENTRE SUMMIT 8750 -M 14.4 * 15.6 13.0 120 GUNSIGHT PASS 9820 15.0 -M * 15.9 -M * KENDALL R.S. 7740 11.7 14.6 80 13.9 14.7 95 LOOMIS PARK 8240 16.3 17.5 93 18.5 17.6 105 NEW FORK LAKE 8340 11.7 11.3 104 10.5 11.4 92 SNIDER BASIN 8060 14.4 14.7 98 14.7 16.3 90 SPRING CREEK DIVIDE 9000 27.3 26.9 101 26.3 26.8 98 TRIPLE PEAK 8500 24.7 25.2 98 26.3 25.1 105 ----- ----- Basin wide percent of average 93 98 LOWER GREEN RIVER HAMS FORK 7840 11.1 12.0 92 11.5 12.3 93 HEWINTA 9519 9.7 12.1 80 13.2 14.7 90 HICKERSON PARK 9145 4.0 7.7 52 7.3 8.0 91 HOLE-IN-ROCK 9150 4.8 7.2 67 7.5 7.5 100 INDIAN CREEK 9425 24.7 28.2 88 21.9 25.7 85 KELLEY R.S. 8180 16.5 17.1 96 18.0 20.6 87 STEEL CREEK PARK 10200 12.5 15.9 79 15.8 16.3 97 ----- ----- Basin wide percent of average 83 91 UPPER BEAR RIVER BUG LAKE 7950 19.1 21.2 90 18.0 19.5 92 HAYDEN FORK 9212 15.9 16.6 96 20.9 21.2 99 KELLEY R.S. 8180 16.5 17.1 96 18.0 20.6 87 LILY LAKE 9156 14.0 13.5 104 16.2 17.6 92 MONTE CRISTO 8960 26.9 30.1 89 26.1 25.7 102 SALT RIVER SUMMIT 7760 15.0 14.6 103 16.2 19.0 85 TRIAL LAKE 9992 23.5 25.3 93 21.9 25.2 87 ----- ----- Basin wide percent of average 95 92 ----------------------------------------------------------------------------- -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.