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 FRIDAY: APRIL 3 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 16.2 18.1 90 19.6 21.8 90 COTTONWOOD CREEK 7670 27.8 24.2 115 31.1 27.9 111 GRAND TARGHEE 9260 43.9 -M * 34.1 -M * GRANITE CREEK 6770 17.0 18.6 91 21.1 20.2 104 GRASSY LAKE 7265 32.7 36.3 90 35.1 36.6 96 GROS VENTRE SUMMIT 8750 -M 14.4 * 15.8 13.1 121 GUNSIGHT PASS 9820 15.2 -M * 16.1 -M * LEWIS LAKE DIVIDE 7850 31.6 36.0 88 33.5 37.3 90 PHILLIPS BENCH 8200 28.5 29.4 97 29.6 29.5 100 SALT RIVER SUMMIT 7760 15.5 14.7 105 16.6 19.1 87 SNAKE RIVER STATION 6920 17.6 19.2 92 22.5 22.6 100 SPRING CREEK DIVIDE 9000 28.0 27.1 103 26.9 26.9 100 THUMB DIVIDE 7980 20.2 19.3 105 21.0 19.2 109 TOGWOTEE PASS 9580 27.8 25.3 110 29.9 25.0 120 TWO OCEAN PLATEAU 9240 38.7 28.6 135 29.7 28.1 106 WILLOW CREEK 8380 35.1 30.8 114 39.5 32.7 121 ----- ----- Basin wide percent of average 103 103 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 23.6 23.7 100 21.5 20.4 105 BLACK BEAR 8170 37.3 39.8 94 35.9 41.1 87 CANYON 7870 13.9 13.9 100 15.1 15.7 96 FISHER CREEK 9100 37.4 35.5 105 36.1 37.0 98 MADISON PLATEAU 7750 23.0 25.5 90 24.5 27.2 90 NORTHEAST ENTRANCE 7350 11.4 11.3 101 13.9 12.9 108 PARKER PEAK 9400 26.7 22.0 121 20.0 16.5 121 SYLVAN LAKE 8420 21.3 22.9 93 23.2 21.2 109 THUMB DIVIDE 7980 20.2 19.3 105 21.0 19.2 109 TWO OCEAN PLATEAU 9240 38.7 28.6 135 29.7 28.1 106 WHISKEY CREEK 6800 16.9 17.5 97 20.2 21.3 95 WHITE MILL 8700 25.2 24.7 102 24.7 27.4 90 WOLVERINE 7650 12.2 11.7 104 12.4 13.0 95 ----- ----- Basin wide percent of average 104 99 WIND RIVER BURROUGHS CREEK 8750 15.9 14.8 107 16.4 16.5 99 COLD SPRINGS 9630 8.0 9.0 89 10.4 10.8 96 DEER PARK 9700 11.9 17.3 69 16.6 22.2 75 HOBBS PARK 10100 13.4 15.3 88 13.3 13.0 102 LITTLE WARM 9370 12.3 12.1 102 14.9 13.6 110 SOUTH PASS 9040 12.8 16.9 76 14.5 18.7 78 ST. LAWRENCE ALT 8620 6.1 7.4 82 9.4 9.0 104 TOGWOTEE PASS 9580 27.8 25.3 110 29.9 25.0 120 TOWNSEND CREEK 8700 9.1 9.0 101 11.4 11.8 97 ----- ----- Basin wide percent of average 92 97 BIGHORN BASIN BALD MTN. 9380 19.1 20.0 96 15.5 17.6 88 BEAR TRAP MEADOW 8200 9.5 5.2 183 10.0 8.4 119 BLACKWATER 9780 25.6 24.9 103 23.1 20.8 111 BONE SPRINGS DIV 9350 17.8 16.5 108 14.7 14.8 99 EVENING STAR 9200 30.7 30.2 102 31.2 25.6 122 GRAVE SPRINGS 8550 10.0 9.5 105 10.5 9.8 107 KIRWIN 9550 12.9 11.5 112 14.2 11.4 125 MARQUETTE 8760 6.7 9.1 74 8.6 9.9 87 MIDDLE POWDER 7760 12.1 11.9 102 10.5 12.5 84 OWL CREEK 8975 5.9 5.6 105 5.9 6.0 98 POWDER RIVER PASS 9480 12.8 11.0 116 14.9 12.5 119 SHELL CREEK 9580 17.1 14.9 115 16.2 13.5 120 SYLVAN LAKE 8420 21.3 22.9 93 23.2 21.2 109 SYLVAN ROAD 7120 14.5 12.9 112 19.3 17.9 108 TIMBER CREEK 7950 4.9 5.8 84 8.3 7.5 111 YOUNTS PEAK 8350 18.5 17.4 106 16.3 16.4 99 ----- ----- Basin wide percent of average 104 107 SHOSHONE RIVER BLACKWATER 9780 25.6 24.9 103 23.1 20.8 111 EVENING STAR 9200 30.7 30.2 102 31.2 25.6 122 KIRWIN 9550 12.9 11.5 112 14.2 11.4 125 MARQUETTE 8760 6.7 9.1 74 8.6 9.9 87 SYLVAN LAKE 8420 21.3 22.9 93 23.2 21.2 109 SYLVAN ROAD 7120 14.5 12.9 112 19.3 17.9 108 YOUNTS PEAK 8350 18.5 17.4 106 16.3 16.4 99 ----- ----- Basin wide percent of average 101 110 POWDER-TONGUE BEAR TRAP MEADOW 8200 9.5 5.2 183 10.0 8.4 119 BIG GOOSE 7990 10.3 10.8 95 12.5 8.6 145 BONE SPRINGS DIV 9350 17.8 16.5 108 14.7 14.8 99 BURGESS JUNCTION 7880 12.8 11.8 108 13.0 12.3 106 CLOUD PEAK RESERVOIR 9860 17.8 13.6 131 16.4 13.0 126 DOME LAKE 8880 13.3 12.7 105 15.6 13.3 117 GRAVE SPRINGS 8550 10.0 9.5 105 10.5 9.8 107 HANSEN SAWMILL 8360 7.1 6.5 109 10.0 8.3 120 MIDDLE POWDER 7760 12.1 11.9 102 10.5 12.5 84 POWDER RIVER PASS 9480 12.8 11.0 116 14.9 12.5 119 SUCKER CREEK 8880 14.9 11.9 125 17.0 13.7 124 TIE CREEK 6870 6.1 6.1 100 13.6 10.0 136 ----- ----- Basin wide percent of average 113 116 BELLE FOURCHE BLIND PARK 6890 7.1 8.6 83 14.8 11.2 132 COLE CANYON 5910 6.9 6.9 100 12.2 6.7 182 NORTH RAPID CREEK 6130 10.3 8.4 123 14.2 8.6 165 ----- ----- Basin wide percent of average 102 155 UPPER N. PLATTE RIVER COLUMBINE 9160 27.7 25.1 110 27.6 25.5 108 DIVIDE PEAK 8880 24.5 20.1 122 25.7 20.9 123 ELK RIVER 8700 22.8 19.7 116 22.2 19.8 112 JOE WRIGHT 10120 23.7 21.6 110 28.3 25.0 113 NORTH FRENCH CREEK 10130 35.6 29.8 119 32.2 24.9 129 OLD BATTLE 10000 34.5 32.6 106 38.9 34.9 111 SAGE CREEK BASIN 7850 12.4 11.7 106 14.6 12.1 121 SOUTH BRUSH CREEK 8440 13.4 13.2 102 17.3 16.6 104 TOWER 10500 46.1 46.1 100 43.2 38.8 111 WEBBER SPRINGS 9250 25.9 26.4 98 29.1 27.0 108 WILLOW CREEK PASS 9540 12.6 12.2 103 12.5 13.0 96 ----- ----- Basin wide percent of average 108 113 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 23.9 24.1 99 21.7 22.3 97 CASPER MTN. 7900 12.6 14.7 86 13.6 14.6 93 DEADMAN HILL 10220 16.5 16.6 99 16.8 17.1 98 DEER PARK 9700 11.9 17.3 69 16.6 22.2 75 LAPRELE CREEK 8375 9.5 11.0 86 12.1 12.7 95 RENO HILL 8400 14.8 14.4 103 15.7 15.1 104 ROACH 9700 15.3 17.3 88 17.7 18.8 94 SAND LAKE 10050 31.2 32.9 95 29.0 24.4 119 SOUTH PASS 9040 12.8 16.9 76 14.5 18.7 78 WINDY PEAK 7900 9.2 8.2 112 10.1 10.6 95 ----- ----- Basin wide percent of average 91 95 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 17.6 10.9 161 18.9 16.0 118 DIVIDE PEAK 8880 24.5 20.1 122 25.7 20.9 123 OLD BATTLE 10000 34.5 32.6 106 38.9 34.9 111 SANDSTONE RS 8150 19.5 14.7 133 21.0 18.9 111 WHISKEY PARK 8950 34.0 30.5 111 34.6 29.0 119 ----- ----- Basin wide percent of average 120 116 UPPER GREEN RIVER BIG SANDY OPENING 9080 12.6 14.7 86 12.4 13.5 92 BLIND BULL SUM 8650 27.5 28.4 97 20.2 22.6 89 EAST RIM DIVIDE 7930 10.3 13.4 77 12.2 12.2 100 ELKHART PARK G.S. 9400 13.0 13.6 96 14.1 13.5 104 GROS VENTRE SUMMIT 8750 -M 14.4 * 15.8 13.1 121 GUNSIGHT PASS 9820 15.2 -M * 16.1 -M * KENDALL R.S. 7740 11.9 14.5 82 14.1 14.8 95 LOOMIS PARK 8240 16.6 17.5 95 18.7 17.7 106 NEW FORK LAKE 8340 11.9 11.4 104 10.7 11.5 93 SNIDER BASIN 8060 14.7 14.8 99 15.0 16.4 91 SPRING CREEK DIVIDE 9000 28.0 27.1 103 26.9 26.9 100 TRIPLE PEAK 8500 25.2 25.3 100 26.7 25.2 106 ----- ----- Basin wide percent of average 95 100 LOWER GREEN RIVER HAMS FORK 7840 11.3 11.9 95 11.8 12.4 95 HEWINTA 9519 10.3 12.2 84 13.6 14.8 92 HICKERSON PARK 9145 4.4 7.8 56 7.8 8.0 98 HOLE-IN-ROCK 9150 5.0 7.2 69 7.8 7.6 103 INDIAN CREEK 9425 25.2 28.4 89 22.3 25.9 86 KELLEY R.S. 8180 16.9 17.2 98 18.5 20.7 89 STEEL CREEK PARK 10200 13.0 16.0 81 16.2 16.5 98 ----- ----- Basin wide percent of average 86 93 UPPER BEAR RIVER BUG LAKE 7950 19.4 21.3 91 18.2 19.5 93 HAYDEN FORK 9212 16.8 16.7 101 21.7 21.3 102 KELLEY R.S. 8180 16.9 17.2 98 18.5 20.7 89 LILY LAKE 9156 14.6 13.7 107 16.6 17.7 94 MONTE CRISTO 8960 27.4 30.2 91 26.1 25.9 101 SALT RIVER SUMMIT 7760 15.5 14.7 105 16.6 19.1 87 TRIAL LAKE 9992 24.4 25.4 96 22.6 25.3 89 ----- ----- Basin wide percent of average 97 94 ----------------------------------------------------------------------------- -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.