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 10 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 16.0 17.7 90 20.1 22.4 90 COTTONWOOD CREEK 7670 28.7 24.3 118 32.9 28.9 114 GRAND TARGHEE 9260 46.4 -M * 35.8 -M * GRANITE CREEK 6770 17.0 18.0 94 21.5 20.7 104 GRASSY LAKE 7265 33.8 37.0 91 36.3 37.6 97 GROS VENTRE SUMMIT 8750 -M 14.6 * 16.3 13.6 120 GUNSIGHT PASS 9820 15.9 -M * 17.0 -M * LEWIS LAKE DIVIDE 7850 32.3 36.6 88 34.8 38.5 90 PHILLIPS BENCH 8200 29.4 30.2 97 30.6 30.4 101 SALT RIVER SUMMIT 7760 15.8 14.8 107 17.2 19.8 87 SNAKE RIVER STATION 6920 17.9 18.6 96 23.2 23.4 99 SPRING CREEK DIVIDE 9000 29.1 28.0 104 28.0 27.8 101 THUMB DIVIDE 7980 21.6 19.3 112 22.2 19.9 112 TOGWOTEE PASS 9580 28.6 26.1 110 30.8 26.0 118 TWO OCEAN PLATEAU 9240 39.8 29.7 134 30.4 29.1 104 WILLOW CREEK 8380 37.2 31.5 118 41.5 33.9 122 ----- ----- Basin wide percent of average 105 104 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 24.6 24.6 100 22.5 21.1 107 BLACK BEAR 8170 37.9 40.5 94 37.3 42.3 88 CANYON 7870 14.4 14.0 103 15.6 16.2 96 FISHER CREEK 9100 38.1 36.4 105 36.8 38.2 96 MADISON PLATEAU 7750 23.8 26.0 92 25.4 28.2 90 NORTHEAST ENTRANCE 7350 11.9 11.0 108 14.7 13.3 111 PARKER PEAK 9400 29.0 22.8 127 -M 17.2 * SYLVAN LAKE 8420 22.6 23.6 96 24.8 22.0 113 THUMB DIVIDE 7980 21.6 19.3 112 22.2 19.9 112 TWO OCEAN PLATEAU 9240 39.8 29.7 134 30.4 29.1 104 WHISKEY CREEK 6800 17.6 17.7 99 20.9 22.1 95 WHITE MILL 8700 -M 25.3 * -M 28.3 * WOLVERINE 7650 12.7 11.5 110 13.2 13.5 98 ----- ----- Basin wide percent of average 106 99 WIND RIVER BURROUGHS CREEK 8750 16.1 15.1 107 17.0 17.1 99 COLD SPRINGS 9630 8.5 8.3 102 11.3 11.4 99 DEER PARK 9700 14.0 17.3 81 18.9 23.3 81 HOBBS PARK 10100 15.7 16.1 98 15.8 13.9 114 LITTLE WARM 9370 12.4 12.4 100 15.4 14.2 108 SOUTH PASS 9040 14.8 17.4 85 16.5 19.5 85 ST. LAWRENCE ALT 8620 7.5 7.5 100 10.9 9.6 114 TOGWOTEE PASS 9580 28.6 26.1 110 30.8 26.0 118 TOWNSEND CREEK 8700 11.1 9.6 116 13.8 12.6 110 ----- ----- Basin wide percent of average 99 102 BIGHORN BASIN BALD MTN. 9380 20.0 20.9 96 16.3 18.4 89 BEAR TRAP MEADOW 8200 9.5 5.1 186 10.2 8.9 115 BLACKWATER 9780 27.5 25.9 106 24.8 21.8 114 BONE SPRINGS DIV 9350 18.4 17.1 108 15.3 15.6 98 EVENING STAR 9200 31.8 31.3 102 33.1 26.7 124 GRAVE SPRINGS 8550 10.5 10.2 103 11.1 10.6 105 KIRWIN 9550 13.8 12.0 115 15.1 12.0 126 MARQUETTE 8760 8.1 9.9 82 9.9 10.7 93 MIDDLE POWDER 7760 12.9 13.0 99 11.1 13.2 84 OWL CREEK 8975 6.4 5.7 112 6.5 6.4 102 POWDER RIVER PASS 9480 13.0 11.5 113 15.2 13.2 115 SHELL CREEK 9580 17.3 15.6 111 16.4 14.2 115 SYLVAN LAKE 8420 22.6 23.6 96 24.8 22.0 113 SYLVAN ROAD 7120 15.2 12.7 120 20.4 18.5 110 TIMBER CREEK 7950 5.0 5.8 86 8.6 8.0 108 YOUNTS PEAK 8350 18.5 17.8 104 16.5 17.0 97 ----- ----- Basin wide percent of average 105 108 SHOSHONE RIVER BLACKWATER 9780 27.5 25.9 106 24.8 21.8 114 EVENING STAR 9200 31.8 31.3 102 33.1 26.7 124 KIRWIN 9550 13.8 12.0 115 15.1 12.0 126 MARQUETTE 8760 8.1 9.9 82 9.9 10.7 93 SYLVAN LAKE 8420 22.6 23.6 96 24.8 22.0 113 SYLVAN ROAD 7120 15.2 12.7 120 20.4 18.5 110 YOUNTS PEAK 8350 18.5 17.8 104 16.5 17.0 97 ----- ----- Basin wide percent of average 103 112 POWDER-TONGUE BEAR TRAP MEADOW 8200 9.5 5.1 186 10.2 8.9 115 BIG GOOSE 7990 12.2 11.8 103 14.5 9.6 151 BONE SPRINGS DIV 9350 18.4 17.1 108 15.3 15.6 98 BURGESS JUNCTION 7880 13.9 12.5 111 14.4 13.0 111 CLOUD PEAK RESERVOIR 9860 19.1 14.5 132 18.1 13.9 130 DOME LAKE 8880 14.7 13.4 110 17.1 14.1 121 GRAVE SPRINGS 8550 10.5 10.2 103 11.1 10.6 105 HANSEN SAWMILL 8360 7.8 6.5 120 11.1 8.8 126 MIDDLE POWDER 7760 12.9 13.0 99 11.1 13.2 84 POWDER RIVER PASS 9480 13.0 11.5 113 15.2 13.2 115 SUCKER CREEK 8880 16.7 12.8 130 18.8 14.5 130 TIE CREEK 6870 8.2 6.0 137 16.0 10.7 150 ----- ----- Basin wide percent of average 117 118 BELLE FOURCHE BLIND PARK 6890 7.6 8.1 94 15.5 11.8 131 COLE CANYON 5910 8.0 7.1 113 13.4 7.2 186 NORTH RAPID CREEK 6130 10.8 8.8 123 15.1 9.1 166 ----- ----- Basin wide percent of average 110 157 UPPER N. PLATTE RIVER COLUMBINE 9160 27.7 25.1 110 29.0 26.4 110 DIVIDE PEAK 8880 27.3 20.6 133 28.5 21.7 131 ELK RIVER 8700 23.6 20.1 117 23.4 20.6 114 JOE WRIGHT 10120 24.3 22.7 107 29.6 26.2 113 NORTH FRENCH CREEK 10130 36.9 31.4 118 33.3 25.9 129 OLD BATTLE 10000 37.2 33.8 110 40.9 36.1 113 SAGE CREEK BASIN 7850 15.5 11.9 130 16.2 12.6 129 SOUTH BRUSH CREEK 8440 14.3 13.4 107 18.8 17.4 108 TOWER 10500 47.2 48.0 98 44.1 40.3 109 WEBBER SPRINGS 9250 28.1 26.3 107 32.1 28.0 115 WILLOW CREEK PASS 9540 13.9 13.0 107 13.6 13.6 100 ----- ----- Basin wide percent of average 111 115 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 25.2 25.4 99 23.4 23.4 100 CASPER MTN. 7900 14.3 15.9 90 14.8 15.7 94 DEADMAN HILL 10220 17.6 17.5 101 17.9 18.0 99 DEER PARK 9700 14.0 17.3 81 18.9 23.3 81 LAPRELE CREEK 8375 9.5 10.8 88 13.9 13.5 103 RENO HILL 8400 16.2 15.4 105 17.6 16.3 108 ROACH 9700 17.1 18.1 94 19.8 19.7 101 SAND LAKE 10050 33.0 34.1 97 31.0 25.5 122 SOUTH PASS 9040 14.8 17.4 85 16.5 19.5 85 WINDY PEAK 7900 9.6 8.4 114 11.4 11.2 102 ----- ----- Basin wide percent of average 95 100 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 18.9 9.8 193 19.8 16.7 119 DIVIDE PEAK 8880 27.3 20.6 133 28.5 21.7 131 OLD BATTLE 10000 37.2 33.8 110 40.9 36.1 113 SANDSTONE RS 8150 21.9 14.2 154 22.5 19.6 115 WHISKEY PARK 8950 35.2 30.7 115 36.2 30.1 120 ----- ----- Basin wide percent of average 129 119 UPPER GREEN RIVER BIG SANDY OPENING 9080 13.5 15.2 89 13.4 14.1 95 BLIND BULL SUM 8650 28.2 28.8 98 20.7 23.3 89 EAST RIM DIVIDE 7930 10.7 13.7 78 12.7 12.6 101 ELKHART PARK G.S. 9400 14.5 13.9 104 15.7 14.1 111 GROS VENTRE SUMMIT 8750 -M 14.6 * 16.3 13.6 120 GUNSIGHT PASS 9820 15.9 -M * 17.0 -M * KENDALL R.S. 7740 12.0 14.2 85 14.4 15.2 95 LOOMIS PARK 8240 17.3 17.5 99 19.4 18.2 107 NEW FORK LAKE 8340 12.7 11.5 110 11.6 11.9 97 SNIDER BASIN 8060 15.2 15.0 101 15.6 17.0 92 SPRING CREEK DIVIDE 9000 29.1 28.0 104 28.0 27.8 101 TRIPLE PEAK 8500 25.1 25.8 97 27.4 26.0 105 ----- ----- Basin wide percent of average 97 101 LOWER GREEN RIVER HAMS FORK 7840 12.0 11.0 109 12.6 12.9 98 HEWINTA 9519 12.6 12.5 101 14.6 15.5 94 HICKERSON PARK 9145 5.9 8.3 71 9.5 8.5 112 HOLE-IN-ROCK 9150 6.6 7.5 88 9.5 8.0 119 INDIAN CREEK 9425 26.3 29.2 90 23.5 26.8 88 KELLEY R.S. 8180 17.4 17.4 100 19.2 21.4 90 STEEL CREEK PARK 10200 14.5 16.7 87 17.7 17.5 101 ----- ----- Basin wide percent of average 93 96 UPPER BEAR RIVER BUG LAKE 7950 20.5 21.8 94 19.0 20.2 94 HAYDEN FORK 9212 17.8 16.9 105 23.0 22.3 103 KELLEY R.S. 8180 17.4 17.4 100 19.2 21.4 90 LILY LAKE 9156 16.1 14.6 110 17.9 18.6 96 MONTE CRISTO 8960 29.0 30.5 95 28.1 26.9 104 SALT RIVER SUMMIT 7760 15.8 14.8 107 17.2 19.8 87 TRIAL LAKE 9992 25.2 26.0 97 23.8 26.3 90 ----- ----- Basin wide percent of average 100 95 ----------------------------------------------------------------------------- -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.